chan_unistim.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * UNISTIM channel driver for asterisk
 *
 * Copyright (C) 2005 - 2007, Cedric Hans
 * 
 * Cedric Hans <cedric.hans@mlkj.net>
 *
 * Asterisk 1.4 patch by Peter Be
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*!
 * \file
 *
 * \brief chan_unistim channel driver for Asterisk
 * \author Cedric Hans <cedric.hans@mlkj.net>
 *
 * Unistim (Unified Networks IP Stimulus) channel driver
 * for Nortel i2002, i2004 and i2050
 *
 * \ingroup channel_drivers
 */

#include "asterisk.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision: 192941 $")

#include <sys/stat.h>
#include <signal.h>

#if defined(__CYGWIN__)
/*
 * cygwin headers are partly inconsistent. struct iovec is defined in sys/uio.h
 * which is not included by default by sys/socket.h - in_pktinfo is defined in
 * w32api/ws2tcpip.h but this probably has compatibility problems with sys/socket.h
 * So for the time being we simply disable HAVE_PKTINFO when building under cygwin.
 *    This should be done in some common header, but for now this is the only file
 * using iovec and in_pktinfo so it suffices to apply the fix here.
 */
#ifdef HAVE_PKTINFO
#undef HAVE_PKTINFO
#endif
#endif /* __CYGWIN__ */

#include "asterisk/paths.h"   /* ast_config_AST_LOG_DIR used in (too ?) many places */
#include "asterisk/network.h"
#include "asterisk/channel.h"
#include "asterisk/config.h"
#include "asterisk/module.h"
#include "asterisk/pbx.h"
#include "asterisk/event.h"
#include "asterisk/rtp.h"
#include "asterisk/netsock.h"
#include "asterisk/acl.h"
#include "asterisk/callerid.h"
#include "asterisk/cli.h"
#include "asterisk/app.h"
#include "asterisk/musiconhold.h"
#include "asterisk/causes.h"
#include "asterisk/indications.h"

/*! Beware, G729 and G723 are not supported by asterisk, except with the proper licence */
#define CAPABILITY AST_FORMAT_ALAW | AST_FORMAT_ULAW    /* | AST_FORMAT_G729A | AST_FORMAT_G723_1 */

#define DEFAULTCONTEXT    "default"
#define DEFAULTCALLERID  "Unknown"
#define DEFAULTCALLERNAME       " "
#define USTM_LOG_DIR     "unistimHistory"

/*! Size of the transmit buffer */
#define MAX_BUF_SIZE     64
/*! Number of slots for the transmit queue */
#define MAX_BUF_NUMBER    50
/*! Try x times before removing the phone */
#define NB_MAX_RETRANSMIT       8
/*! Nb of milliseconds waited when no events are scheduled */
#define IDLE_WAIT        1000
/*! Wait x milliseconds before resending a packet */
#define RETRANSMIT_TIMER   2000
/*! How often the mailbox is checked for new messages */
#define TIMER_MWI        10000
/*! Not used */
#define DEFAULT_CODEC      0x00
#define SIZE_PAGE        4096
#define DEVICE_NAME_LEN  16
#define AST_CONFIG_MAX_PATH     255
#define MAX_ENTRY_LOG      30

#define SUB_REAL     0
#define SUB_THREEWAY     1
#define MAX_SUBS     2

enum autoprovision {
   AUTOPROVISIONING_NO = 0,
   AUTOPROVISIONING_YES,
   AUTOPROVISIONING_DB,
   AUTOPROVISIONING_TN
};

enum autoprov_extn {
   /*! Do not create an extension into the default dialplan */
   EXTENSION_NONE = 0,
   /*! Prompt user for an extension number and register it */
   EXTENSION_ASK,
   /*! Register an extension with the line=> value */
   EXTENSION_LINE,
   /*! Used with AUTOPROVISIONING_TN */
   EXTENSION_TN
};
#define OUTPUT_HANDSET    0xC0
#define OUTPUT_HEADPHONE   0xC1
#define OUTPUT_SPEAKER    0xC2

#define VOLUME_LOW         0x01
#define VOLUME_LOW_SPEAKER      0x03
#define VOLUME_NORMAL      0x02
#define VOLUME_INSANELY_LOUD    0x07

#define MUTE_OFF     0x00
#define MUTE_ON       0xFF
#define MUTE_ON_DISCRET  0xCE

#define SIZE_HEADER       6
#define SIZE_MAC_ADDR      17
#define TEXT_LENGTH_MAX  24
#define TEXT_LINE0         0x00
#define TEXT_LINE1         0x20
#define TEXT_LINE2         0x40
#define TEXT_NORMAL       0x05
#define TEXT_INVERSE     0x25
#define STATUS_LENGTH_MAX       28

#define FAV_ICON_NONE         0x00
#define FAV_ICON_ONHOOK_BLACK    0x20
#define FAV_ICON_ONHOOK_WHITE    0x21
#define FAV_ICON_SPEAKER_ONHOOK_BLACK   0x22
#define FAV_ICON_SPEAKER_ONHOOK_WHITE   0x23
#define FAV_ICON_OFFHOOK_BLACK     0x24
#define FAV_ICON_OFFHOOK_WHITE     0x25
#define FAV_ICON_ONHOLD_BLACK    0x26
#define FAV_ICON_ONHOLD_WHITE    0x27
#define FAV_ICON_SPEAKER_OFFHOOK_BLACK  0x28
#define FAV_ICON_SPEAKER_OFFHOOK_WHITE  0x29
#define FAV_ICON_PHONE_BLACK      0x2A
#define FAV_ICON_PHONE_WHITE      0x2B
#define FAV_ICON_SPEAKER_ONHOLD_BLACK   0x2C
#define FAV_ICON_SPEAKER_ONHOLD_WHITE   0x2D
#define FAV_ICON_HEADPHONES        0x2E
#define FAV_ICON_HEADPHONES_ONHOLD      0x2F
#define FAV_ICON_HOME         0x30
#define FAV_ICON_CITY         0x31
#define FAV_ICON_SHARP       0x32
#define FAV_ICON_PAGER       0x33
#define FAV_ICON_CALL_CENTER      0x34
#define FAV_ICON_FAX        0x35
#define FAV_ICON_MAILBOX      0x36
#define FAV_ICON_REFLECT      0x37
#define FAV_ICON_COMPUTER         0x38
#define FAV_ICON_FORWARD      0x39
#define FAV_ICON_LOCKED     0x3A
#define FAV_ICON_TRASH       0x3B
#define FAV_ICON_INBOX       0x3C
#define FAV_ICON_OUTBOX     0x3D
#define FAV_ICON_MEETING      0x3E
#define FAV_ICON_BOX        0x3F

#define FAV_BLINK_FAST       0x20
#define FAV_BLINK_SLOW       0x40

#define FAV_MAX_LENGTH       0x0A

static void dummy(char *unused, ...)
{
   return;
}

/*! \brief Global jitterbuffer configuration - by default, jb is disabled */
static struct ast_jb_conf default_jbconf =
{
        .flags = 0,
   .max_size = -1,
   .resync_threshold = -1,
   .impl = ""
};
static struct ast_jb_conf global_jbconf;
            

/* #define DUMP_PACKET 1 */
/* #define DEBUG_TIMER ast_verbose */

#define DEBUG_TIMER dummy
/*! Enable verbose output. can also be set with the CLI */
static int unistimdebug = 0;
static int unistim_port;
static enum autoprovision autoprovisioning = AUTOPROVISIONING_NO;
static int unistim_keepalive;
static int unistimsock = -1;

static struct {
   unsigned int tos;
   unsigned int tos_audio;
   unsigned int cos;
   unsigned int cos_audio;
} qos = { 0, 0, 0, 0 };

static struct io_context *io;
static struct sched_context *sched;
static struct sockaddr_in public_ip = { 0, };
/*! give the IP address for the last packet received */
static struct sockaddr_in address_from;
/*! size of the sockaddr_in (in WSARecvFrom) */
static unsigned int size_addr_from = sizeof(address_from);
/*! Receive buffer address */
static unsigned char *buff;
static int unistim_reloading = 0;
AST_MUTEX_DEFINE_STATIC(unistim_reload_lock);
AST_MUTEX_DEFINE_STATIC(usecnt_lock);
static int usecnt = 0;
/* extern char ast_config_AST_LOG_DIR[AST_CONFIG_MAX_PATH]; */

/*! This is the thread for the monitor which checks for input on the channels
 * which are not currently in use.  */
static pthread_t monitor_thread = AST_PTHREADT_NULL;

/*! Protect the monitoring thread, so only one process can kill or start it, and not
 *    when it's doing something critical. */
AST_MUTEX_DEFINE_STATIC(monlock);
/*! Protect the session list */
AST_MUTEX_DEFINE_STATIC(sessionlock);
/*! Protect the device list */
AST_MUTEX_DEFINE_STATIC(devicelock);

enum phone_state {
   STATE_INIT,
   STATE_AUTHDENY,
   STATE_MAINPAGE,
   STATE_EXTENSION,
   STATE_DIALPAGE,
   STATE_RINGING,
   STATE_CALL,
   STATE_SELECTCODEC,
   STATE_CLEANING,
   STATE_HISTORY
};

enum handset_state {
   STATE_ONHOOK,
   STATE_OFFHOOK,
};

enum phone_key {
   KEY_0 = 0x40,
   KEY_1 = 0x41,
   KEY_2 = 0x42,
   KEY_3 = 0x43,
   KEY_4 = 0x44,
   KEY_5 = 0x45,
   KEY_6 = 0x46,
   KEY_7 = 0x47,
   KEY_8 = 0x48,
   KEY_9 = 0x49,
   KEY_STAR = 0x4a,
   KEY_SHARP = 0x4b,
   KEY_UP = 0x4c,
   KEY_DOWN = 0x4d,
   KEY_RIGHT = 0x4e,
   KEY_LEFT = 0x4f,
   KEY_QUIT = 0x50,
   KEY_COPY = 0x51,
   KEY_FUNC1 = 0x54,
   KEY_FUNC2 = 0x55,
   KEY_FUNC3 = 0x56,
   KEY_FUNC4 = 0x57,
   KEY_ONHOLD = 0x5b,
   KEY_HANGUP = 0x5c,
   KEY_MUTE = 0x5d,
   KEY_HEADPHN = 0x5e,
   KEY_LOUDSPK = 0x5f,
   KEY_FAV0 = 0x60,
   KEY_FAV1 = 0x61,
   KEY_FAV2 = 0x62,
   KEY_FAV3 = 0x63,
   KEY_FAV4 = 0x64,
   KEY_FAV5 = 0x65,
   KEY_COMPUTR = 0x7b,
   KEY_CONF = 0x7c,
   KEY_SNDHIST = 0x7d,
   KEY_RCVHIST = 0x7e,
   KEY_INDEX = 0x7f
};

struct tone_zone_unistim {
   char country[3];
   int freq1;
   int freq2;
};

static const struct tone_zone_unistim frequency[] = {
   {"us", 350, 440},
   {"fr", 440, 0},
   {"au", 413, 438},
   {"nl", 425, 0},
   {"uk", 350, 440},
   {"fi", 425, 0},
   {"es", 425, 0},
   {"jp", 400, 0},
   {"no", 425, 0},
   {"at", 420, 0},
   {"nz", 400, 0},
   {"tw", 350, 440},
   {"cl", 400, 0},
   {"se", 425, 0},
   {"be", 425, 0},
   {"sg", 425, 0},
   {"il", 414, 0},
   {"br", 425, 0},
   {"hu", 425, 0},
   {"lt", 425, 0},
   {"pl", 425, 0},
   {"za", 400, 0},
   {"pt", 425, 0},
   {"ee", 425, 0},
   {"mx", 425, 0},
   {"in", 400, 0},
   {"de", 425, 0},
   {"ch", 425, 0},
   {"dk", 425, 0},
   {"cn", 450, 0},
   {"--", 0, 0}
};

struct wsabuf {
   u_long len;
   unsigned char *buf;
};

struct systemtime {
   unsigned short w_year;
   unsigned short w_month;
   unsigned short w_day_of_week;
   unsigned short w_day;
   unsigned short w_hour;
   unsigned short w_minute;
   unsigned short w_second;
   unsigned short w_milliseconds;
};

struct unistim_subchannel {
   ast_mutex_t lock;
   /*! SUBS_REAL or SUBS_THREEWAY */
   unsigned int subtype;
   /*! Asterisk channel used by the subchannel */
   struct ast_channel *owner;
   /*! Unistim line */
   struct unistim_line *parent;
   /*! RTP handle */
   struct ast_rtp *rtp;
   int alreadygone;
   char ringvolume;
   char ringstyle;
};

/*!
 * \todo Convert to stringfields
 */
struct unistim_line {
   ast_mutex_t lock;
   /*! Like 200 */
   char name[80];
   /*! Like USTM/200\@black */
   char fullname[80];
   /*! pointer to our current connection, channel... */
   struct unistim_subchannel *subs[MAX_SUBS];
   /*! Extension where to start */
   char exten[AST_MAX_EXTENSION];
   /*! Context to start in */
   char context[AST_MAX_EXTENSION];
   /*! Language for asterisk sounds */
   char language[MAX_LANGUAGE];
   /*! CallerID Number */
   char cid_num[AST_MAX_EXTENSION];
   /*! Mailbox for MWI */
   char mailbox[AST_MAX_EXTENSION];
   /*! Used by MWI */
   int lastmsgssent;
   /*! Used by MWI */
   time_t nextmsgcheck;
   /*! MusicOnHold class */
   char musicclass[MAX_MUSICCLASS];
   /*! Call group */
   unsigned int callgroup;
   /*! Pickup group */
   unsigned int pickupgroup;
   /*! Account code (for billing) */
   char accountcode[80];
   /*! AMA flags (for billing) */
   int amaflags;
   /*! Codec supported */
   int capability;
   /*! Parkinglot */
   char parkinglot[AST_MAX_CONTEXT];
   struct unistim_line *next;
   struct unistim_device *parent;
};

/*! 
 * \brief A device containing one or more lines 
 */
static struct unistim_device {
   int receiver_state;        /*!< state of the receiver (see ReceiverState) */
   int size_phone_number;    /*!< size of the phone number */
   char phone_number[16];    /*!< the phone number entered by the user */
   char redial_number[16];  /*!< the last phone number entered by the user */
   int phone_current;            /*!< Number of the current phone */
   int pos_fav;             /*!< Position of the displayed favorites (used for scrolling) */
   char id[18];             /*!< mac address of the current phone in ascii */
   char name[DEVICE_NAME_LEN];     /*!< name of the device */
   int softkeylinepos;          /*!< position of the line softkey (default 0) */
   char softkeylabel[6][11];       /*!< soft key label */
   char softkeynumber[6][16];      /*!< number dialed when the soft key is pressed */
   char softkeyicon[6];     /*!< icon number */
   char softkeydevice[6][16];      /*!< name of the device monitored */
   struct unistim_device *sp[6];   /*!< pointer to the device monitored by this soft key */
   char maintext0[25];          /*!< when the phone is idle, display this string on line 0 */
   char maintext1[25];          /*!< when the phone is idle, display this string on line 1 */
   char maintext2[25];          /*!< when the phone is idle, display this string on line 2 */
   char titledefault[13];    /*!< title (text before date/time) */
   char datetimeformat;     /*!< format used for displaying time/date */
   char contrast;         /*!< contrast */
   char country[3];        /*!< country used for dial tone frequency */
   struct tone_zone *tz;          /*!< Tone zone for res_indications (ring, busy, congestion) */
   char ringvolume;        /*!< Ring volume */
   char ringstyle;          /*!< Ring melody */
   int rtp_port;           /*!< RTP port used by the phone */
   int rtp_method;          /*!< Select the unistim data used to establish a RTP session */
   int status_method;            /*!< Select the unistim packet used for sending status text */
   char codec_number;            /*!< The current codec used to make calls */
   int missed_call;        /*!< Number of call unanswered */
   int callhistory;        /*!< Allowed to record call history */
   char lst_cid[TEXT_LENGTH_MAX];  /*!< Last callerID received */
   char lst_cnm[TEXT_LENGTH_MAX];  /*!< Last callername recevied */
   char call_forward[AST_MAX_EXTENSION];   /*!< Forward number */
   int output;               /*!< Handset, headphone or speaker */
   int previous_output;     /*!< Previous output */
   int volume;               /*!< Default volume */
   int mute;                   /*!< Mute mode */
   int moh;             /*!< Music on hold in progress */
   int nat;             /*!< Used by the obscure ast_rtp_setnat */
   enum autoprov_extn extension;   /*!< See ifdef EXTENSION for valid values */
   char extension_number[11];      /*!< Extension number entered by the user */
   char to_delete;          /*!< Used in reload */
   time_t start_call_timestamp;    /*!< timestamp for the length calculation of the call */
   struct ast_silence_generator *silence_generator;
   struct unistim_line *lines;
   struct ast_ha *ha;
   struct unistimsession *session;
   struct unistim_device *next;
} *devices = NULL;

static struct unistimsession {
   ast_mutex_t lock;
   struct sockaddr_in sin;  /*!< IP address of the phone */
   struct sockaddr_in sout;   /*!< IP address of server */
   int timeout;             /*!< time-out in ticks : resend packet if no ack was received before the timeout occured */
   unsigned short seq_phone;       /*!< sequence number for the next packet (when we receive a request) */
   unsigned short seq_server;      /*!< sequence number for the next packet (when we send a request) */
   unsigned short last_seq_ack;    /*!< sequence number of the last ACK received */
   unsigned long tick_next_ping;   /*!< time for the next ping */
   int last_buf_available;  /*!< number of a free slot */
   int nb_retransmit;            /*!< number of retransmition */
   int state;                 /*!< state of the phone (see phone_state) */
   int size_buff_entry;     /*!< size of the buffer used to enter datas */
   char buff_entry[16];     /*!< Buffer for temporary datas */
   char macaddr[18];           /*!< mac adress of the phone (not always available) */
   struct wsabuf wsabufsend[MAX_BUF_NUMBER];      /*!< Size of each paquet stored in the buffer array & pointer to this buffer */
   unsigned char buf[MAX_BUF_NUMBER][MAX_BUF_SIZE];   /*!< Buffer array used to keep the lastest non-acked paquets */
   struct unistim_device *device;
   struct unistimsession *next;
} *sessions = NULL;

/*!
 * \page Unistim datagram formats
 *
 * Format of datagrams :
 * bytes 0 & 1 : ffff for discovery packet, 0000 for everything else
 * byte 2 : sequence number (high part)
 * byte 3 : sequence number (low part)
 * byte 4 : 2 = ask question or send info, 1 = answer or ACK, 0 = retransmit request
 * byte 5 : direction, 1 = server to phone, 2 = phone to server arguments
 */

static const unsigned char packet_rcv_discovery[] =
   { 0xff, 0xff, 0xff, 0xff, 0x02, 0x02, 0xff, 0xff, 0xff, 0xff, 0x9e, 0x03, 0x08 };
static unsigned char packet_send_discovery_ack[] =
   { 0x00, 0x00, /*Initial Seq (2 bytes) */ 0x00, 0x00, 0x00, 0x01 };

static const unsigned char packet_recv_firm_version[] =
   { 0x00, 0x00, 0x00, 0x13, 0x9a, 0x0a, 0x02 };
static const unsigned char packet_recv_pressed_key[] =
   { 0x00, 0x00, 0x00, 0x13, 0x99, 0x04, 0x00 };
static const unsigned char packet_recv_pick_up[] =
   { 0x00, 0x00, 0x00, 0x13, 0x99, 0x03, 0x04 };
static const unsigned char packet_recv_hangup[] =
   { 0x00, 0x00, 0x00, 0x13, 0x99, 0x03, 0x03 };
static const unsigned char packet_recv_r2[] = { 0x00, 0x00, 0x00, 0x13, 0x96, 0x03, 0x03 };

/*! TransportAdapter */
static const unsigned char packet_recv_resume_connection_with_server[] =
   { 0xff, 0xff, 0xff, 0xff, 0x9e, 0x03, 0x08 };
static const unsigned char packet_recv_mac_addr[] =
   { 0xff, 0xff, 0xff, 0xff, 0x9a, 0x0d, 0x07 /*MacAddr */  };

static const unsigned char packet_send_date_time3[] =
   { 0x11, 0x09, 0x02, 0x02, /*Month */ 0x05, /*Day */ 0x06, /*Hour */ 0x07,
/*Minutes */ 0x08, 0x32
};
static const unsigned char packet_send_date_time[] =
   { 0x11, 0x09, 0x02, 0x0a, /*Month */ 0x05, /*Day */ 0x06, /*Hour */ 0x07, /*Minutes */
0x08, 0x32, 0x17, 0x04, 0x24, 0x07, 0x19,
   0x04, 0x07, 0x00, 0x19, 0x05, 0x09, 0x3e, 0x0f, 0x16, 0x05, 0x00, 0x80, 0x00, 0x1e,
      0x05, 0x12, 0x00, 0x78
};

static const unsigned char packet_send_no_ring[] =
   { 0x16, 0x04, 0x1a, 0x00, 0x16, 0x04, 0x11, 0x00 };
static const unsigned char packet_send_s4[] =
   { 0x16, 0x04, 0x1a, 0x00, 0x16, 0x04, 0x11, 0x00, 0x16, 0x06, 0x32, 0xdf, 0x00, 0xff,
0x16, 0x05, 0x1c, 0x00, 0x00, 0x17, 0x05,
   0x0b, 0x00, 0x00, 0x19, 0x04, 0x00, 0x00, 0x19, 0x04, 0x00, 0x08, 0x19, 0x04, 0x00,
      0x10, 0x19, 0x04, 0x00, 0x18, 0x16, 0x05,
   0x31, 0x00, 0x00, 0x16, 0x05, 0x04, 0x00, 0x00
};
static const unsigned char packet_send_call[] =
   { 0x16, 0x04, 0x1a, 0x00, 0x16, 0x04, 0x11, 0x00, 0x16, 0x06, 0x32, 0xdf,
   0x00, 0xff, 0x16, 0x05, 0x1c, 0x00, 0x00, 0x16, 0x0a, 0x38, 0x00, 0x12, 0xca, 0x03,
      0xc0, 0xc3, 0xc5, 0x16, 0x16, 0x30, 0x00,
   0x00, /*codec */ 0x12, 0x12, /* frames per packet */ 0x01, 0x5c, 0x00, /*port RTP */
      0x0f, 0xa0, /* port RTCP */ 0x9c, 0x41,
   /*port RTP */ 0x0f, 0xa0, /* port RTCP */ 0x9c, 0x41, /* IP Address */ 0x0a, 0x01,
      0x16, 0x66
};
static const unsigned char packet_send_stream_based_tone_off[] =
   { 0x16, 0x05, 0x1c, 0x00, 0x00 };

/* static const unsigned char packet_send_Mute[] = { 0x16, 0x05, 0x04, 0x00, 0x00 };
static const unsigned char packet_send_CloseAudioStreamRX[] = { 0x16, 0x05, 0x31, 0x00, 0xff };
static const unsigned char packet_send_CloseAudioStreamTX[] = { 0x16, 0x05, 0x31, 0xff, 0x00 };*/
static const unsigned char packet_send_stream_based_tone_on[] =
   { 0x16, 0x06, 0x1b, 0x00, 0x00, 0x05 };
static const unsigned char packet_send_stream_based_tone_single_freq[] =
   { 0x16, 0x06, 0x1d, 0x00, 0x01, 0xb8 };
static const unsigned char packet_send_stream_based_tone_dial_freq[] =
   { 0x16, 0x08, 0x1d, 0x00, 0x01, 0xb8, 0x01, 0x5e };
static const unsigned char packet_send_select_output[] =
   { 0x16, 0x06, 0x32, 0xc0, 0x01, 0x00 };
static const unsigned char packet_send_ring[] =
   { 0x16, 0x06, 0x32, 0xdf, 0x00, 0xff, 0x16, 0x05, 0x1c, 0x00, 0x00, 0x16,
   0x04, 0x1a, 0x01, 0x16, 0x05, 0x12, 0x13 /* Ring type 10 to 17 */ , 0x18, 0x16, 0x04, 0x18,     /* volume 00, 10, 20... */
   0x20, 0x16, 0x04, 0x10, 0x00
};
static const unsigned char packet_send_end_call[] =
   { 0x16, 0x06, 0x32, 0xdf, 0x00, 0xff, 0x16, 0x05, 0x31, 0x00, 0x00, 0x19, 0x04, 0x00,
0x10, 0x19, 0x04, 0x00, 0x18, 0x16, 0x05,
   0x04, 0x00, 0x00, 0x16, 0x04, 0x37, 0x10
};
static const unsigned char packet_send_s9[] =
   { 0x16, 0x06, 0x32, 0xdf, 0x00, 0xff, 0x19, 0x04, 0x00, 0x10, 0x16, 0x05, 0x1c, 0x00,
0x00 };
static const unsigned char packet_send_rtp_packet_size[] =
   { 0x16, 0x08, 0x38, 0x00, 0x00, 0xe0, 0x00, 0xa0 };
static const unsigned char packet_send_jitter_buffer_conf[] =
   { 0x16, 0x0e, 0x3a, 0x00, /* jitter */ 0x02, /* high water mark */ 0x04, 0x00, 0x00,
/* early packet resync 2 bytes */ 0x3e, 0x80,
   0x00, 0x00, /* late packet resync 2 bytes */ 0x3e, 0x80
};

/* Duration in ms div 2 (0x20 = 64ms, 0x08 = 16ms) 
static unsigned char packet_send_StreamBasedToneCad[] =
  { 0x16, 0x0a, 0x1e, 0x00, duration on  0x0a, duration off  0x0d, duration on 0x0a, duration off 0x0d, duration on 0x0a, duration off 0x2b }; */
static const unsigned char packet_send_open_audio_stream_rx[] =
   { 0x16, 0x1a, 0x30, 0x00, 0xff, /* Codec */ 0x00, 0x00, 0x01, 0x00, 0xb8, 0xb8, 0x0e,
0x0e, 0x01, /* Port */ 0x14, 0x50, 0x00,
   0x00, /* Port */ 0x14, 0x50, 0x00, 0x00, /* Dest IP */ 0x0a, 0x93, 0x69, 0x05
};
static const unsigned char packet_send_open_audio_stream_tx[] =
   { 0x16, 0x1a, 0x30, 0xff, 0x00, 0x00, /* Codec */ 0x00, 0x01, 0x00, 0xb8, 0xb8, 0x0e,
0x0e, 0x01, /* Local port */ 0x14, 0x50,
   0x00, 0x00, /* Rmt Port */ 0x14, 0x50, 0x00, 0x00, /* Dest IP */ 0x0a, 0x93, 0x69, 0x05
};

static const unsigned char packet_send_open_audio_stream_rx3[] =
   { 0x16, 0x1a, 0x30, 0x00, 0xff, /* Codec */ 0x00, 0x00, 0x02, 0x01, 0xb8, 0xb8, 0x06,
0x06, 0x81, /* RTP Port */ 0x14, 0x50,
/* RTCP Port */ 0x14,
   0x51, /* RTP Port */ 0x14, 0x50, /* RTCP Port */ 0x00, 0x00, /* Dest IP */ 0x0a, 0x93,
      0x69, 0x05
};
static const unsigned char packet_send_open_audio_stream_tx3[] =
   { 0x16, 0x1a, 0x30, 0xff, 0x00, 0x00, /* Codec */ 0x00, 0x02, 0x01, 0xb8, 0xb8, 0x06,
0x06, 0x81, /* RTP Local port */ 0x14, 0x50,
   /* RTCP Port */ 0x00, 0x00, /* RTP Rmt Port */ 0x14, 0x50, /* RTCP Port */ 0x00, 0x00,
      /* Dest IP */ 0x0a, 0x93, 0x69, 0x05
};

static const unsigned char packet_send_arrow[] = { 0x17, 0x04, 0x04, 0x00 };
static const unsigned char packet_send_blink_cursor[] = { 0x17, 0x04, 0x10, 0x86 };
static const unsigned char packet_send_date_time2[] = { 0x17, 0x04, 0x17, 0x3d, 0x11, 0x09, 0x02, 0x0a, /*Month */ 0x05,   /*Day */
   0x06, /*Hour */ 0x07, /*Minutes */ 0x08, 0x32
};
static const unsigned char packet_send_Contrast[] =
   { 0x17, 0x04, 0x24, /*Contrast */ 0x08 };
static const unsigned char packet_send_StartTimer[] =
   { 0x17, 0x05, 0x0b, 0x05, 0x00, 0x17, 0x08, 0x16, /* Text */ 0x44, 0x75, 0x72, 0xe9,
0x65 };
static const unsigned char packet_send_stop_timer[] = { 0x17, 0x05, 0x0b, 0x02, 0x00 };
static const unsigned char packet_send_icon[] = { 0x17, 0x05, 0x14, /*pos */ 0x00, /*icon */ 0x25 };      /* display an icon in front of the text zone */
static const unsigned char packet_send_S7[] = { 0x17, 0x06, 0x0f, 0x30, 0x07, 0x07 };
static const unsigned char packet_send_set_pos_cursor[] =
   { 0x17, 0x06, 0x10, 0x81, 0x04, /*pos */ 0x20 };

/*static unsigned char packet_send_MonthLabelsDownload[] =
  { 0x17, 0x0a, 0x15,  Month (3 char)  0x46, 0x65, 0x62, 0x4d, 0xe4, 0x72, 0x20 }; */
static const unsigned char packet_send_favorite[] =
   { 0x17, 0x0f, 0x19, 0x10, /*pos */ 0x01, /*name */ 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, /*end_name */ 0x19,
   0x05, 0x0f, /*pos */ 0x01, /*icone */ 0x00
};
static const unsigned char packet_send_title[] =
   { 0x17, 0x10, 0x19, 0x02, /*text */ 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20 /*end_text */  };
static const unsigned char packet_send_text[] =
   { 0x17, 0x1e, 0x1b, 0x04, /*pos */ 0x00, /*inverse */ 0x25, /*text */ 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
   0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
      /*end_text */ 0x17, 0x04, 0x10, 0x87
};
static const unsigned char packet_send_status[] =
   { 0x17, 0x20, 0x19, 0x08, /*text */ 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
   0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20    /*end_text */
};
static const unsigned char packet_send_status2[] =
   { 0x17, 0x0b, 0x19, /* pos [08|28|48|68] */ 0x00, /* text */ 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20 /* end_text */  };

static const unsigned char packet_send_led_update[] = { 0x19, 0x04, 0x00, 0x00 };

static const unsigned char packet_send_query_basic_manager_04[] = { 0x1a, 0x04, 0x01, 0x04 };
static const unsigned char packet_send_query_mac_address[] = { 0x1a, 0x04, 0x01, 0x08 };
static const unsigned char packet_send_query_basic_manager_10[] = { 0x1a, 0x04, 0x01, 0x10 };
static const unsigned char packet_send_S1[] = { 0x1a, 0x07, 0x07, 0x00, 0x00, 0x00, 0x13 };

static unsigned char packet_send_ping[] =
   { 0x1e, 0x05, 0x12, 0x00, /*Watchdog timer */ 0x78 };

#define BUFFSEND unsigned char buffsend[64] = { 0x00, 0x00, 0xaa, 0xbb, 0x02, 0x01 }

static const char tdesc[] = "UNISTIM Channel Driver";
static const char channel_type[] = "USTM";

/*! Protos */
static struct ast_channel *unistim_new(struct unistim_subchannel *sub, int state);
static int load_module(void);
static int reload(void);
static int unload_module(void);
static int reload_config(void);
static void show_main_page(struct unistimsession *pte);
static struct ast_channel *unistim_request(const char *type, int format, 
   void *data, int *cause);
static int unistim_call(struct ast_channel *ast, char *dest, int timeout);
static int unistim_hangup(struct ast_channel *ast);
static int unistim_answer(struct ast_channel *ast);
static struct ast_frame *unistim_read(struct ast_channel *ast);
static int unistim_write(struct ast_channel *ast, struct ast_frame *frame);
static int unistim_indicate(struct ast_channel *ast, int ind, const void *data,
   size_t datalen);
static int unistim_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
static int unistim_senddigit_begin(struct ast_channel *ast, char digit);
static int unistim_senddigit_end(struct ast_channel *ast, char digit, 
   unsigned int duration);
static int unistim_sendtext(struct ast_channel *ast, const char *text);

static int write_entry_history(struct unistimsession *pte, FILE * f, char c, 
   char *line1);
static void change_callerid(struct unistimsession *pte, int type, char *callerid);

static const struct ast_channel_tech unistim_tech = {
   .type = channel_type,
   .description = tdesc,
   .capabilities = CAPABILITY,
   .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER,
   .requester = unistim_request,
   .call = unistim_call,
   .hangup = unistim_hangup,
   .answer = unistim_answer,
   .read = unistim_read,
   .write = unistim_write,
   .indicate = unistim_indicate,
   .fixup = unistim_fixup,
   .send_digit_begin = unistim_senddigit_begin,
   .send_digit_end = unistim_senddigit_end,
   .send_text = unistim_sendtext,
/*      .bridge = ast_rtp_bridge, */
};

static void display_last_error(const char *sz_msg)
{
   time_t cur_time;
   
   time(&cur_time);

   /* Display the error message */
   ast_log(LOG_WARNING, "%s %s : (%u) %s\n", ctime(&cur_time), sz_msg, errno,
         strerror(errno));
}

static unsigned int get_tick_count(void)
{
   struct timeval now = ast_tvnow();

   return (now.tv_sec * 1000) + (now.tv_usec / 1000);
}

/* Send data to a phone without retransmit nor buffering */
static void send_raw_client(int size, unsigned char *data, struct sockaddr_in *addr_to,
   const struct sockaddr_in *addr_ourip)
{
#ifdef HAVE_PKTINFO
   struct iovec msg_iov;
   struct msghdr msg;
   char buffer[CMSG_SPACE(sizeof(struct in_pktinfo))];
   struct cmsghdr *ip_msg = (struct cmsghdr *) buffer;
   struct in_pktinfo *pki = (struct in_pktinfo *) CMSG_DATA(ip_msg);

   msg_iov.iov_base = data;
   msg_iov.iov_len = size;

   msg.msg_name = addr_to;  /* optional address */
   msg.msg_namelen = sizeof(struct sockaddr_in);   /* size of address */
   msg.msg_iov = &msg_iov;  /* scatter/gather array */
   msg.msg_iovlen = 1;          /* # elements in msg_iov */
   msg.msg_control = ip_msg;       /* ancillary data */
   msg.msg_controllen = sizeof(buffer);    /* ancillary data buffer len */
   msg.msg_flags = 0;            /* flags on received message */

   ip_msg->cmsg_len = CMSG_LEN(sizeof(*pki));
   ip_msg->cmsg_level = IPPROTO_IP;
   ip_msg->cmsg_type = IP_PKTINFO;
   pki->ipi_ifindex = 0;      /* Interface index, 0 = use interface specified in routing table */
   pki->ipi_spec_dst.s_addr = addr_ourip->sin_addr.s_addr; /* Local address */
   /* pki->ipi_addr = ;   Header Destination address - ignored by kernel */

#ifdef DUMP_PACKET
   if (unistimdebug) {
      int tmp;
      char iabuf[INET_ADDRSTRLEN];
      char iabuf2[INET_ADDRSTRLEN];
      ast_verb(0, "\n**> From %s sending %d bytes to %s ***\n",
               ast_inet_ntoa(addr_ourip->sin_addr), (int) size,
               ast_inet_ntoa(addr_to->sin_addr));
      for (tmp = 0; tmp < size; tmp++)
         ast_verb(0, "%.2x ", (unsigned char) data[tmp]);
      ast_verb(0, "\n******************************************\n");

   }
#endif

   if (sendmsg(unistimsock, &msg, 0) == -1)
      display_last_error("Error sending datas");
#else
   if (sendto(unistimsock, data, size, 0, (struct sockaddr *) addr_to, sizeof(*addr_to))
      == -1)
      display_last_error("Error sending datas");
#endif
}

static void send_client(int size, const unsigned char *data, struct unistimsession *pte)
{
   unsigned int tick;
   int buf_pos;
   unsigned short *sdata = (unsigned short *) data;

   ast_mutex_lock(&pte->lock);
   buf_pos = pte->last_buf_available;

   if (buf_pos >= MAX_BUF_NUMBER) {
      ast_log(LOG_WARNING, "Error : send queue overflow\n");
      ast_mutex_unlock(&pte->lock);
      return;
   }
   sdata[1] = ntohs(++(pte->seq_server));
   pte->wsabufsend[buf_pos].len = size;
   memcpy(pte->wsabufsend[buf_pos].buf, data, size);

   tick = get_tick_count();
   pte->timeout = tick + RETRANSMIT_TIMER;

/*#ifdef DUMP_PACKET */
   if (unistimdebug)
      ast_verb(6, "Sending datas with seq #0x%.4x Using slot #%d :\n", pte->seq_server, buf_pos);
/*#endif */
   send_raw_client(pte->wsabufsend[buf_pos].len, pte->wsabufsend[buf_pos].buf, &(pte->sin),
              &(pte->sout));
   pte->last_buf_available++;
   ast_mutex_unlock(&pte->lock);
}

static void send_ping(struct unistimsession *pte)
{
   BUFFSEND;
   if (unistimdebug)
      ast_verb(6, "Sending ping\n");
   pte->tick_next_ping = get_tick_count() + unistim_keepalive;
   memcpy(buffsend + SIZE_HEADER, packet_send_ping, sizeof(packet_send_ping));
   send_client(SIZE_HEADER + sizeof(packet_send_ping), buffsend, pte);
}

static int get_to_address(int fd, struct sockaddr_in *toAddr)
{
#ifdef HAVE_PKTINFO
   int err;
   struct msghdr msg;
   struct {
      struct cmsghdr cm;
      int len;
      struct in_addr address;
   } ip_msg;

   /* Zero out the structures before we use them */
   /* This sets several key values to NULL */
   memset(&msg, 0, sizeof(msg));
   memset(&ip_msg, 0, sizeof(ip_msg));

   /* Initialize the message structure */
   msg.msg_control = &ip_msg;
   msg.msg_controllen = sizeof(ip_msg);
   /* Get info about the incoming packet */
   err = recvmsg(fd, &msg, MSG_PEEK);
   if (err == -1)
      ast_log(LOG_WARNING, "recvmsg returned an error: %s\n", strerror(errno));
   memcpy(&toAddr->sin_addr, &ip_msg.address, sizeof(struct in_addr));
   return err;
#else
   memcpy(&toAddr, &public_ip, sizeof(&toAddr));
   return 0;
#endif
}

/* Allocate memory & initialize structures for a new phone */
/* addr_from : ip address of the phone */
static struct unistimsession *create_client(const struct sockaddr_in *addr_from)
{
   int tmp;
   struct unistimsession *s;

   if (!(s = ast_calloc(1, sizeof(*s))))
      return NULL;

   memcpy(&s->sin, addr_from, sizeof(struct sockaddr_in));
   get_to_address(unistimsock, &s->sout);
   if (unistimdebug) {
      ast_verb(0, "Creating a new entry for the phone from %s received via server ip %s\n",
          ast_inet_ntoa(addr_from->sin_addr), ast_inet_ntoa(s->sout.sin_addr));
   }
   ast_mutex_init(&s->lock);
   ast_mutex_lock(&sessionlock);
   s->next = sessions;
   sessions = s;

   s->timeout = get_tick_count() + RETRANSMIT_TIMER;
   s->seq_phone = (short) 0x0000;
   s->seq_server = (short) 0x0000;
   s->last_seq_ack = (short) 0x000;
   s->last_buf_available = 0;
   s->nb_retransmit = 0;
   s->state = STATE_INIT;
   s->tick_next_ping = get_tick_count() + unistim_keepalive;
   /* Initialize struct wsabuf  */
   for (tmp = 0; tmp < MAX_BUF_NUMBER; tmp++) {
      s->wsabufsend[tmp].buf = s->buf[tmp];
   }
   ast_mutex_unlock(&sessionlock);
   return s;
}

static void send_end_call(struct unistimsession *pte)
{
   BUFFSEND;
   if (unistimdebug)
      ast_verb(0, "Sending end call\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_end_call, sizeof(packet_send_end_call));
   send_client(SIZE_HEADER + sizeof(packet_send_end_call), buffsend, pte);
}

static void set_ping_timer(struct unistimsession *pte)
{
   unsigned int tick = 0;  /* XXX what is this for, anyways */

   pte->timeout = pte->tick_next_ping;
   DEBUG_TIMER("tick = %u next ping at %u tick\n", tick, pte->timeout);
   return;
}

/* Checking if our send queue is empty,
 * if true, setting up a timer for keepalive */
static void check_send_queue(struct unistimsession *pte)
{
   /* Check if our send queue contained only one element */
   if (pte->last_buf_available == 1) {
      if (unistimdebug)
         ast_verb(6, "Our single packet was ACKed.\n");
      pte->last_buf_available--;
      set_ping_timer(pte);
      return;
   }
   /* Check if this ACK catch up our latest packet */
   else if (pte->last_seq_ack + 1 == pte->seq_server + 1) {
      if (unistimdebug)
         ast_verb(6, "Our send queue is completely ACKed.\n");
      pte->last_buf_available = 0;    /* Purge the send queue */
      set_ping_timer(pte);
      return;
   }
   if (unistimdebug)
      ast_verb(6, "We still have packets in our send queue\n");
   return;
}

static void send_start_timer(struct unistimsession *pte)
{
   BUFFSEND;
   if (unistimdebug)
      ast_verb(0, "Sending start timer\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_StartTimer, sizeof(packet_send_StartTimer));
   send_client(SIZE_HEADER + sizeof(packet_send_StartTimer), buffsend, pte);
}

static void send_stop_timer(struct unistimsession *pte)
{
   BUFFSEND;
   if (unistimdebug)
      ast_verb(0, "Sending stop timer\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_stop_timer, sizeof(packet_send_stop_timer));
   send_client(SIZE_HEADER + sizeof(packet_send_stop_timer), buffsend, pte);
}

static void Sendicon(unsigned char pos, unsigned char status, struct unistimsession *pte)
{
   BUFFSEND;
   if (unistimdebug)
      ast_verb(0, "Sending icon pos %d with status 0x%.2x\n", pos, status);
   memcpy(buffsend + SIZE_HEADER, packet_send_icon, sizeof(packet_send_icon));
   buffsend[9] = pos;
   buffsend[10] = status;
   send_client(SIZE_HEADER + sizeof(packet_send_icon), buffsend, pte);
}

static void send_tone(struct unistimsession *pte, uint16_t tone1, uint16_t tone2)
{
   BUFFSEND;
   if (!tone1) {
      if (unistimdebug)
         ast_verb(0, "Sending Stream Based Tone Off\n");
      memcpy(buffsend + SIZE_HEADER, packet_send_stream_based_tone_off,
            sizeof(packet_send_stream_based_tone_off));
      send_client(SIZE_HEADER + sizeof(packet_send_stream_based_tone_off), buffsend, pte);
      return;
   }
   /* Since most of the world use a continuous tone, it's useless
      if (unistimdebug)
      ast_verb(0, "Sending Stream Based Tone Cadence Download\n");
      memcpy (buffsend + SIZE_HEADER, packet_send_StreamBasedToneCad, sizeof (packet_send_StreamBasedToneCad));
      send_client (SIZE_HEADER + sizeof (packet_send_StreamBasedToneCad), buffsend, pte); */
   if (unistimdebug)
      ast_verb(0, "Sending Stream Based Tone Frequency Component List Download %d %d\n", tone1, tone2);
   tone1 *= 8;
   if (!tone2) {
      memcpy(buffsend + SIZE_HEADER, packet_send_stream_based_tone_single_freq,
            sizeof(packet_send_stream_based_tone_single_freq));
      buffsend[10] = (tone1 & 0xff00) >> 8;
      buffsend[11] = (tone1 & 0x00ff);
      send_client(SIZE_HEADER + sizeof(packet_send_stream_based_tone_single_freq), buffsend,
               pte);
   } else {
      tone2 *= 8;
      memcpy(buffsend + SIZE_HEADER, packet_send_stream_based_tone_dial_freq,
            sizeof(packet_send_stream_based_tone_dial_freq));
      buffsend[10] = (tone1 & 0xff00) >> 8;
      buffsend[11] = (tone1 & 0x00ff);
      buffsend[12] = (tone2 & 0xff00) >> 8;
      buffsend[13] = (tone2 & 0x00ff);
      send_client(SIZE_HEADER + sizeof(packet_send_stream_based_tone_dial_freq), buffsend,
               pte);
   }

   if (unistimdebug)
      ast_verb(0, "Sending Stream Based Tone On\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_stream_based_tone_on,
         sizeof(packet_send_stream_based_tone_on));
   send_client(SIZE_HEADER + sizeof(packet_send_stream_based_tone_on), buffsend, pte);
}

/* Positions for favorites
 |--------------------|
 |  5     2    |
 |  4     1    |
 |  3     0    |
*/

/* status (icons) : 00 = nothing, 2x/3x = see parser.h, 4x/5x = blink fast, 6x/7x = blink slow */
static void
send_favorite(unsigned char pos, unsigned char status, struct unistimsession *pte,
          const char *text)
{
   BUFFSEND;
   int i;

   if (unistimdebug)
      ast_verb(0, "Sending favorite pos %d with status 0x%.2x\n", pos, status);
   memcpy(buffsend + SIZE_HEADER, packet_send_favorite, sizeof(packet_send_favorite));
   buffsend[10] = pos;
   buffsend[24] = pos;
   buffsend[25] = status;
   i = strlen(text);
   if (i > FAV_MAX_LENGTH)
      i = FAV_MAX_LENGTH;
   memcpy(buffsend + FAV_MAX_LENGTH + 1, text, i);
   send_client(SIZE_HEADER + sizeof(packet_send_favorite), buffsend, pte);
}

static void refresh_all_favorite(struct unistimsession *pte)
{
   int i = 0;

   if (unistimdebug)
      ast_verb(0, "Refreshing all favorite\n");
   for (i = 0; i < 6; i++) {
      if ((pte->device->softkeyicon[i] <= FAV_ICON_HEADPHONES_ONHOLD) &&
         (pte->device->softkeylinepos != i))
         send_favorite((unsigned char) i, pte->device->softkeyicon[i] + 1, pte,
                   pte->device->softkeylabel[i]);
      else
         send_favorite((unsigned char) i, pte->device->softkeyicon[i], pte,
                   pte->device->softkeylabel[i]);

   }
}

/* Change the status for this phone (pte) and update for each phones where pte is bookmarked
 * use FAV_ICON_*_BLACK constant in status parameters */
static void change_favorite_icon(struct unistimsession *pte, unsigned char status)
{
   struct unistim_device *d = devices;
   int i;
   /* Update the current phone */
   if (pte->state != STATE_CLEANING)
      send_favorite(pte->device->softkeylinepos, status, pte,
                pte->device->softkeylabel[pte->device->softkeylinepos]);
   /* Notify other phones if we're in their bookmark */
   while (d) {
      for (i = 0; i < 6; i++) {
         if (d->sp[i] == pte->device) {  /* It's us ? */
            if (d->softkeyicon[i] != status) {      /* Avoid resending the same icon */
               d->softkeyicon[i] = status;
               if (d->session)
                  send_favorite(i, status + 1, d->session, d->softkeylabel[i]);
            }
         }
      }
      d = d->next;
   }
}

static int RegisterExtension(const struct unistimsession *pte)
{
   if (unistimdebug)
      ast_verb(0, "Trying to register extension '%s' into context '%s' to %s\n",
               pte->device->extension_number, pte->device->lines->context,
               pte->device->lines->fullname);
   return ast_add_extension(pte->device->lines->context, 0,
                      pte->device->extension_number, 1, NULL, NULL, "Dial",
                      pte->device->lines->fullname, 0, "Unistim");
}

static int UnregisterExtension(const struct unistimsession *pte)
{
   if (unistimdebug)
      ast_verb(0, "Trying to unregister extension '%s' context '%s'\n",
               pte->device->extension_number, pte->device->lines->context);
   return ast_context_remove_extension(pte->device->lines->context,
                              pte->device->extension_number, 1, "Unistim");
}

/* Free memory allocated for a phone */
static void close_client(struct unistimsession *s)
{
   struct unistim_subchannel *sub;
   struct unistimsession *cur, *prev = NULL;
   ast_mutex_lock(&sessionlock);
   cur = sessions;
   /* Looking for the session in the linked chain */
   while (cur) {
      if (cur == s)
         break;
      prev = cur;
      cur = cur->next;
   }
   if (cur) {                 /* Session found ? */
      if (cur->device) {         /* This session was registered ? */
         s->state = STATE_CLEANING;
         if (unistimdebug)
            ast_verb(0, "close_client session %p device %p lines %p sub %p\n",
                     s, s->device, s->device->lines,
                     s->device->lines->subs[SUB_REAL]);
         change_favorite_icon(s, FAV_ICON_NONE);
         sub = s->device->lines->subs[SUB_REAL];
         if (sub) {
            if (sub->owner) {       /* Call in progress ? */
               if (unistimdebug)
                  ast_verb(0, "Aborting call\n");
               ast_queue_hangup_with_cause(sub->owner, AST_CAUSE_NETWORK_OUT_OF_ORDER);
            }
         } else
            ast_log(LOG_WARNING, "Freeing a client with no subchannel !\n");
         if (!ast_strlen_zero(s->device->extension_number))
            UnregisterExtension(s);
         cur->device->session = NULL;
      } else {
         if (unistimdebug)
            ast_verb(0, "Freeing an unregistered client\n");
      }
      if (prev)
         prev->next = cur->next;
      else
         sessions = cur->next;
      ast_mutex_destroy(&s->lock);
      ast_free(s);
   } else
      ast_log(LOG_WARNING, "Trying to delete non-existent session %p?\n", s);
   ast_mutex_unlock(&sessionlock);
   return;
}

/* Return 1 if the session chained link was modified */
static int send_retransmit(struct unistimsession *pte)
{
   int i;

   ast_mutex_lock(&pte->lock);
   if (++pte->nb_retransmit >= NB_MAX_RETRANSMIT) {
      if (unistimdebug)
         ast_verb(0, "Too many retransmit - freeing client\n");
      ast_mutex_unlock(&pte->lock);
      close_client(pte);
      return 1;
   }
   pte->timeout = get_tick_count() + RETRANSMIT_TIMER;

   for (i = pte->last_buf_available - (pte->seq_server - pte->last_seq_ack);
       i < pte->last_buf_available; i++) {
      if (i < 0) {
         ast_log(LOG_WARNING,
               "Asked to retransmit an ACKed slot ! last_buf_available=%d, seq_server = #0x%.4x last_seq_ack = #0x%.4x\n",
               pte->last_buf_available, pte->seq_server, pte->last_seq_ack);
         continue;
      }

      if (unistimdebug) {
         unsigned short *sbuf = (unsigned short *) pte->wsabufsend[i].buf;
         unsigned short seq;

         seq = ntohs(sbuf[1]);
         ast_verb(0, "Retransmit slot #%d (seq=#0x%.4x), last ack was #0x%.4x\n", i,
                  seq, pte->last_seq_ack);
      }
      send_raw_client(pte->wsabufsend[i].len, pte->wsabufsend[i].buf, &pte->sin,
                 &pte->sout);
   }
   ast_mutex_unlock(&pte->lock);
   return 0;
}

/* inverse : TEXT_INVERSE : yes, TEXT_NORMAL  : no */
static void
send_text(unsigned char pos, unsigned char inverse, struct unistimsession *pte,
       const char *text)
{
   int i;
   BUFFSEND;
   if (unistimdebug)
      ast_verb(0, "Sending text at pos %d, inverse flag %d\n", pos, inverse);
   memcpy(buffsend + SIZE_HEADER, packet_send_text, sizeof(packet_send_text));
   buffsend[10] = pos;
   buffsend[11] = inverse;
   i = strlen(text);
   if (i > TEXT_LENGTH_MAX)
      i = TEXT_LENGTH_MAX;
   memcpy(buffsend + 12, text, i);
   send_client(SIZE_HEADER + sizeof(packet_send_text), buffsend, pte);
}

static void send_text_status(struct unistimsession *pte, const char *text)
{
   BUFFSEND;
   int i;
   if (unistimdebug)
      ast_verb(0, "Sending status text\n");
   if (pte->device) {
      if (pte->device->status_method == 1) {  /* For new firmware and i2050 soft phone */
         int n = strlen(text);
         /* Must send individual button separately */
         int j;
         for (i = 0, j = 0; i < 4; i++, j += 7) {
            int pos = 0x08 + (i * 0x20);
            memcpy(buffsend + SIZE_HEADER, packet_send_status2,
                  sizeof(packet_send_status2));

            buffsend[9] = pos;
            memcpy(buffsend + 10, (j < n) ? (text + j) : "       ", 7);
            send_client(SIZE_HEADER + sizeof(packet_send_status2), buffsend, pte);
         }
         return;
      }
   }


   memcpy(buffsend + SIZE_HEADER, packet_send_status, sizeof(packet_send_status));
   i = strlen(text);
   if (i > STATUS_LENGTH_MAX)
      i = STATUS_LENGTH_MAX;
   memcpy(buffsend + 10, text, i);
   send_client(SIZE_HEADER + sizeof(packet_send_status), buffsend, pte);

}

/* led values in hexa : 0 = bar off, 1 = bar on, 2 = bar 1s on/1s off, 3 = bar 2.5s on/0.5s off
 * 4 = bar 0.6s on/0.3s off, 5 = bar 0.5s on/0.5s off, 6 = bar 2s on/0.5s off
 * 7 = bar off, 8 = speaker off, 9 = speaker on, 10 = headphone off, 11 = headphone on
 * 18 = mute off, 19 mute on */
static void send_led_update(struct unistimsession *pte, unsigned char led)
{
   BUFFSEND;
   if (unistimdebug)
      ast_verb(0, "Sending led_update (%x)\n", led);
   memcpy(buffsend + SIZE_HEADER, packet_send_led_update, sizeof(packet_send_led_update));
   buffsend[9] = led;
   send_client(SIZE_HEADER + sizeof(packet_send_led_update), buffsend, pte);
}

/* output = OUTPUT_HANDSET, OUTPUT_HEADPHONE or OUTPUT_SPEAKER
 * volume = VOLUME_LOW, VOLUME_NORMAL, VOLUME_INSANELY_LOUD
 * mute = MUTE_OFF, MUTE_ON */
static void
send_select_output(struct unistimsession *pte, unsigned char output, unsigned char volume,
             unsigned char mute)
{
   BUFFSEND;
   if (unistimdebug)
      ast_verb(0, "Sending select output packet output=%x volume=%x mute=%x\n", output,
               volume, mute);
   memcpy(buffsend + SIZE_HEADER, packet_send_select_output,
         sizeof(packet_send_select_output));
   buffsend[9] = output;
   if (output == OUTPUT_SPEAKER)
      volume = VOLUME_LOW_SPEAKER;
   else
      volume = VOLUME_LOW;
   buffsend[10] = volume;
   if (mute == MUTE_ON_DISCRET)
      buffsend[11] = MUTE_ON;
   else
      buffsend[11] = mute;
   send_client(SIZE_HEADER + sizeof(packet_send_select_output), buffsend, pte);
   if (mute == MUTE_OFF)
      send_led_update(pte, 0x18);
   else if (mute == MUTE_ON)
      send_led_update(pte, 0x19);
   pte->device->mute = mute;
   if (output == OUTPUT_HANDSET) {
      if (mute == MUTE_ON)
         change_favorite_icon(pte, FAV_ICON_ONHOLD_BLACK);
      else
         change_favorite_icon(pte, FAV_ICON_OFFHOOK_BLACK);
      send_led_update(pte, 0x08);
      send_led_update(pte, 0x10);
   } else if (output == OUTPUT_HEADPHONE) {
      if (mute == MUTE_ON)
         change_favorite_icon(pte, FAV_ICON_HEADPHONES_ONHOLD);
      else
         change_favorite_icon(pte, FAV_ICON_HEADPHONES);
      send_led_update(pte, 0x08);
      send_led_update(pte, 0x11);
   } else if (output == OUTPUT_SPEAKER) {
      send_led_update(pte, 0x10);
      send_led_update(pte, 0x09);
      if (pte->device->receiver_state == STATE_OFFHOOK) {
         if (mute == MUTE_ON)
            change_favorite_icon(pte, FAV_ICON_SPEAKER_ONHOLD_BLACK);
         else
            change_favorite_icon(pte, FAV_ICON_SPEAKER_ONHOOK_BLACK);
      } else {
         if (mute == MUTE_ON)
            change_favorite_icon(pte, FAV_ICON_SPEAKER_ONHOLD_BLACK);
         else
            change_favorite_icon(pte, FAV_ICON_SPEAKER_OFFHOOK_BLACK);
      }
   } else
      ast_log(LOG_WARNING, "Invalid ouput (%d)\n", output);
   if (output != pte->device->output)
      pte->device->previous_output = pte->device->output;
   pte->device->output = output;
}

static void send_ring(struct unistimsession *pte, char volume, char style)
{
   BUFFSEND;
   if (unistimdebug)
      ast_verb(0, "Sending ring packet\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_ring, sizeof(packet_send_ring));
   buffsend[24] = style + 0x10;
   buffsend[29] = volume * 0x10;
   send_client(SIZE_HEADER + sizeof(packet_send_ring), buffsend, pte);
}

static void send_no_ring(struct unistimsession *pte)
{
   BUFFSEND;
   if (unistimdebug)
      ast_verb(0, "Sending no ring packet\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_no_ring, sizeof(packet_send_no_ring));
   send_client(SIZE_HEADER + sizeof(packet_send_no_ring), buffsend, pte);
}

static void send_texttitle(struct unistimsession *pte, const char *text)
{
   BUFFSEND;
   int i;
   if (unistimdebug)
      ast_verb(0, "Sending title text\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_title, sizeof(packet_send_title));
   i = strlen(text);
   if (i > 12)
      i = 12;
   memcpy(buffsend + 10, text, i);
   send_client(SIZE_HEADER + sizeof(packet_send_title), buffsend, pte);

}

static void send_date_time(struct unistimsession *pte)
{
   BUFFSEND;
   struct timeval now = ast_tvnow();
   struct ast_tm atm = { 0, };

   if (unistimdebug)
      ast_verb(0, "Sending Time & Date\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_date_time, sizeof(packet_send_date_time));
   ast_localtime(&now, &atm, NULL);
   buffsend[10] = (unsigned char) atm.tm_mon + 1;
   buffsend[11] = (unsigned char) atm.tm_mday;
   buffsend[12] = (unsigned char) atm.tm_hour;
   buffsend[13] = (unsigned char) atm.tm_min;
   send_client(SIZE_HEADER + sizeof(packet_send_date_time), buffsend, pte);
}

static void send_date_time2(struct unistimsession *pte)
{
   BUFFSEND;
   struct timeval now = ast_tvnow();
   struct ast_tm atm = { 0, };

   if (unistimdebug)
      ast_verb(0, "Sending Time & Date #2\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_date_time2, sizeof(packet_send_date_time2));
   ast_localtime(&now, &atm, NULL);
   if (pte->device)
      buffsend[9] = pte->device->datetimeformat;
   else
      buffsend[9] = 61;
   buffsend[14] = (unsigned char) atm.tm_mon + 1;
   buffsend[15] = (unsigned char) atm.tm_mday;
   buffsend[16] = (unsigned char) atm.tm_hour;
   buffsend[17] = (unsigned char) atm.tm_min;
   send_client(SIZE_HEADER + sizeof(packet_send_date_time2), buffsend, pte);
}

static void send_date_time3(struct unistimsession *pte)
{
   BUFFSEND;
   struct timeval now = ast_tvnow();
   struct ast_tm atm = { 0, };

   if (unistimdebug)
      ast_verb(0, "Sending Time & Date #3\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_date_time3, sizeof(packet_send_date_time3));
   ast_localtime(&now, &atm, NULL);
   buffsend[10] = (unsigned char) atm.tm_mon + 1;
   buffsend[11] = (unsigned char) atm.tm_mday;
   buffsend[12] = (unsigned char) atm.tm_hour;
   buffsend[13] = (unsigned char) atm.tm_min;
   send_client(SIZE_HEADER + sizeof(packet_send_date_time3), buffsend, pte);
}

static void send_blink_cursor(struct unistimsession *pte)
{
   BUFFSEND;
   if (unistimdebug)
      ast_verb(0, "Sending set blink\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_blink_cursor, sizeof(packet_send_blink_cursor));
   send_client(SIZE_HEADER + sizeof(packet_send_blink_cursor), buffsend, pte);
   return;
}

/* pos : 0xab (a=0/2/4 = line ; b = row) */
static void send_cursor_pos(struct unistimsession *pte, unsigned char pos)
{
   BUFFSEND;
   if (unistimdebug)
      ast_verb(0, "Sending set cursor position\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_set_pos_cursor,
         sizeof(packet_send_set_pos_cursor));
   buffsend[11] = pos;
   send_client(SIZE_HEADER + sizeof(packet_send_set_pos_cursor), buffsend, pte);
   return;
}

static void rcv_resume_connection_with_server(struct unistimsession *pte)
{
   BUFFSEND;
   if (unistimdebug) {
      ast_verb(0, "ResumeConnectionWithServer received\n");
      ast_verb(0, "Sending packet_send_query_mac_address\n");
   }
   memcpy(buffsend + SIZE_HEADER, packet_send_query_mac_address,
         sizeof(packet_send_query_mac_address));
   send_client(SIZE_HEADER + sizeof(packet_send_query_mac_address), buffsend, pte);
   return;
}

static int unistim_register(struct unistimsession *s)
{
   struct unistim_device *d;

   ast_mutex_lock(&devicelock);
   d = devices;
   while (d) {
      if (!strcasecmp(s->macaddr, d->id)) {
         /* XXX Deal with IP authentication */
         s->device = d;
         d->session = s;
         d->codec_number = DEFAULT_CODEC;
         d->pos_fav = 0;
         d->missed_call = 0;
         d->receiver_state = STATE_ONHOOK;
         break;
      }
      d = d->next;
   }
   ast_mutex_unlock(&devicelock);

   if (!d)
      return 0;

   return 1;
}

static int alloc_sub(struct unistim_line *l, int x)
{
   struct unistim_subchannel *sub;
   if (!(sub = ast_calloc(1, sizeof(*sub))))
      return 0;

   if (unistimdebug)
      ast_verb(3, "Allocating UNISTIM subchannel #%d on %s@%s ptr=%p\n", x, l->name, l->parent->name, sub);
   sub->parent = l;
   sub->subtype = x;
   l->subs[x] = sub;
   ast_mutex_init(&sub->lock);
   return 1;
}

static int unalloc_sub(struct unistim_line *p, int x)
{
   if (!x) {
      ast_log(LOG_WARNING, "Trying to unalloc the real channel %s@%s?!?\n", p->name,
            p->parent->name);
      return -1;
   }
   if (unistimdebug)
      ast_debug(1, "Released sub %d of channel %s@%s\n", x, p->name,
            p->parent->name);
   ast_mutex_destroy(&p->lock);
   ast_free(p->subs[x]);
   p->subs[x] = 0;
   return 0;
}

static void rcv_mac_addr(struct unistimsession *pte, const unsigned char *buf)
{
   BUFFSEND;
   int tmp, i = 0;
   char addrmac[19];
   int res = 0;
   if (unistimdebug)
      ast_verb(0, "Mac Address received : ");
   for (tmp = 15; tmp < 15 + SIZE_HEADER; tmp++) {
      sprintf(&addrmac[i], "%.2x", (unsigned char) buf[tmp]);
      i += 2;
   }
   if (unistimdebug)
      ast_verb(0, "%s\n", addrmac);
   strcpy(pte->macaddr, addrmac);
   res = unistim_register(pte);
   if (!res) {
      switch (autoprovisioning) {
      case AUTOPROVISIONING_NO:
         ast_log(LOG_WARNING, "No entry found for this phone : %s\n", addrmac);
         pte->state = STATE_AUTHDENY;
         break;
      case AUTOPROVISIONING_YES:
         {
            struct unistim_device *d, *newd;
            struct unistim_line *newl;
            if (unistimdebug)
               ast_verb(0, "New phone, autoprovisioning on\n");
            /* First : locate the [template] section */
            ast_mutex_lock(&devicelock);
            d = devices;
            while (d) {
               if (!strcasecmp(d->name, "template")) {
                  /* Found, cloning this entry */
                  if (!(newd = ast_malloc(sizeof(*newd)))) {
                     ast_mutex_unlock(&devicelock);
                     return;
                  }

                  memcpy(newd, d, sizeof(*newd));
                  if (!(newl = ast_malloc(sizeof(*newl)))) {
                     ast_free(newd);
                     ast_mutex_unlock(&devicelock);
                     return;
                  }

                  memcpy(newl, d->lines, sizeof(*newl));
                  if (!alloc_sub(newl, SUB_REAL)) {
                     ast_free(newd);
                     ast_free(newl);
                     ast_mutex_unlock(&devicelock);
                     return;
                  }
                  /* Ok, now updating some fields */
                  ast_copy_string(newd->id, addrmac, sizeof(newd->id));
                  ast_copy_string(newd->name, addrmac, sizeof(newd->name));
                  if (newd->extension == EXTENSION_NONE)
                     newd->extension = EXTENSION_ASK;
                  newd->lines = newl;
                  newd->receiver_state = STATE_ONHOOK;
                  newd->session = pte;
                  newd->to_delete = -1;
                  pte->device = newd;
                  newd->next = NULL;
                  newl->parent = newd;
                  strcpy(newl->name, d->lines->name);
                  snprintf(d->lines->name, sizeof(d->lines->name), "%d",
                         atoi(d->lines->name) + 1);
                  snprintf(newl->fullname, sizeof(newl->fullname), "USTM/%s@%s",
                         newl->name, newd->name);
                  /* Go to the end of the linked chain */
                  while (d->next) {
                     d = d->next;
                  }
                  d->next = newd;
                  d = newd;
                  break;
               }
               d = d->next;
            }
            ast_mutex_unlock(&devicelock);
            if (!d) {
               ast_log(LOG_WARNING, "No entry [template] found in unistim.conf\n");
               pte->state = STATE_AUTHDENY;
            }
         }
         break;
      case AUTOPROVISIONING_TN:
         pte->state = STATE_AUTHDENY;
         break;
      case AUTOPROVISIONING_DB:
         ast_log(LOG_WARNING,
               "Autoprovisioning with database is not yet functional\n");
         break;
      default:
         ast_log(LOG_WARNING, "Internal error : unknown autoprovisioning value = %d\n",
               autoprovisioning);
      }
   }
   if (pte->state != STATE_AUTHDENY) {
      ast_verb(3, "Device '%s' successfuly registered\n", pte->device->name);
      switch (pte->device->extension) {
      case EXTENSION_NONE:
         pte->state = STATE_MAINPAGE;
         break;
      case EXTENSION_ASK:
         /* Checking if we already have an extension number */
         if (ast_strlen_zero(pte->device->extension_number))
            pte->state = STATE_EXTENSION;
         else {
            /* Yes, because of a phone reboot. We don't ask again for the TN */
            if (RegisterExtension(pte))
               pte->state = STATE_EXTENSION;
            else
               pte->state = STATE_MAINPAGE;
         }
         break;
      case EXTENSION_LINE:
         ast_copy_string(pte->device->extension_number, pte->device->lines->name,
                     sizeof(pte->device->extension_number));
         if (RegisterExtension(pte))
            pte->state = STATE_EXTENSION;
         else
            pte->state = STATE_MAINPAGE;
         break;
      case EXTENSION_TN:
         /* If we are here, it's because of a phone reboot */
         pte->state = STATE_MAINPAGE;
         break;
      default:
         ast_log(LOG_WARNING, "Internal error, extension value unknown : %d\n",
               pte->device->extension);
         pte->state = STATE_AUTHDENY;
         break;
      }
   }
   if (pte->state == STATE_EXTENSION) {
      if (pte->device->extension != EXTENSION_TN)
         pte->device->extension = EXTENSION_ASK;
      pte->device->extension_number[0] = '\0';
   }
   if (unistimdebug)
      ast_verb(0, "\nSending S1\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_S1, sizeof(packet_send_S1));
   send_client(SIZE_HEADER + sizeof(packet_send_S1), buffsend, pte);

   if (unistimdebug)
      ast_verb(0, "Sending query_basic_manager_04\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_query_basic_manager_04,
         sizeof(packet_send_query_basic_manager_04));
   send_client(SIZE_HEADER + sizeof(packet_send_query_basic_manager_04), buffsend, pte);

   if (unistimdebug)
      ast_verb(0, "Sending query_basic_manager_10\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_query_basic_manager_10,
         sizeof(packet_send_query_basic_manager_10));
   send_client(SIZE_HEADER + sizeof(packet_send_query_basic_manager_10), buffsend, pte);

   send_date_time(pte);
   return;
}

static int write_entry_history(struct unistimsession *pte, FILE * f, char c, char *line1)
{
   if (fwrite(&c, 1, 1, f) != 1) {
      display_last_error("Unable to write history log header.");
      return -1;
   }
   if (fwrite(line1, TEXT_LENGTH_MAX, 1, f) != 1) {
      display_last_error("Unable to write history entry - date.");
      return -1;
   }
   if (fwrite(pte->device->lst_cid, TEXT_LENGTH_MAX, 1, f) != 1) {
      display_last_error("Unable to write history entry - callerid.");
      return -1;
   }
   if (fwrite(pte->device->lst_cnm, TEXT_LENGTH_MAX, 1, f) != 1) {
      display_last_error("Unable to write history entry - callername.");
      return -1;
   }
   return 0;
}

static int write_history(struct unistimsession *pte, char way, char ismissed)
{
   char tmp[AST_CONFIG_MAX_PATH], tmp2[AST_CONFIG_MAX_PATH];
   char line1[TEXT_LENGTH_MAX + 1];
   char count = 0, *histbuf;
   int size;
   FILE *f, *f2;
   struct timeval now = ast_tvnow();
   struct ast_tm atm = { 0, };

   if (!pte->device)
      return -1;
   if (!pte->device->callhistory)
      return 0;
   if (strchr(pte->device->name, '/') || (pte->device->name[0] == '.')) {
      ast_log(LOG_WARNING, "Account code '%s' insecure for writing file\n",
            pte->device->name);
      return -1;
   }

   snprintf(tmp, sizeof(tmp), "%s/%s", ast_config_AST_LOG_DIR, USTM_LOG_DIR);
   if (ast_mkdir(tmp, 0770)) {
      if (errno != EEXIST) {
         display_last_error("Unable to create directory for history");
         return -1;
      }
   }

   ast_localtime(&now, &atm, NULL);
   if (ismissed) {
      if (way == 'i')
         strcpy(tmp2, "Miss");
      else
         strcpy(tmp2, "Fail");
   } else
      strcpy(tmp2, "Answ");
   snprintf(line1, sizeof(line1), "%04d/%02d/%02d %02d:%02d:%02d %s",
          atm.tm_year + 1900, atm.tm_mon + 1, atm.tm_mday, atm.tm_hour,
          atm.tm_min, atm.tm_sec, tmp2);

   snprintf(tmp, sizeof(tmp), "%s/%s/%s-%c.csv", ast_config_AST_LOG_DIR,
          USTM_LOG_DIR, pte->device->name, way);
   if ((f = fopen(tmp, "r"))) {
      struct stat bufstat;

      if (stat(tmp, &bufstat)) {
         display_last_error("Unable to stat history log.");
         fclose(f);
         return -1;
      }
      size = 1 + (MAX_ENTRY_LOG * TEXT_LENGTH_MAX * 3);
      if (bufstat.st_size != size) {
         ast_log(LOG_WARNING,
               "History file %s has an incorrect size (%d instead of %d). It will be replaced by a new one.",
               tmp, (int) bufstat.st_size, size);
         fclose(f);
         f = NULL;
         count = 1;
      }
   }

   /* If we can't open the log file, we create a brand new one */
   if (!f) {
      char c = 1;
      int i;

      if ((errno != ENOENT) && (count == 0)) {
         display_last_error("Unable to open history log.");
         return -1;
      }
      f = fopen(tmp, "w");
      if (!f) {
         display_last_error("Unable to create history log.");
         return -1;
      }
      if (write_entry_history(pte, f, c, line1)) {
         fclose(f);
         return -1;
      }
      memset(line1, ' ', TEXT_LENGTH_MAX);
      for (i = 3; i < MAX_ENTRY_LOG * 3; i++) {
         if (fwrite(line1, TEXT_LENGTH_MAX, 1, f) != 1) {
            display_last_error("Unable to write history entry - stuffing.");
            fclose(f);
            return -1;
         }
      }
      if (fclose(f))
         display_last_error("Unable to close history - creation.");
      return 0;
   }
   /* We can open the log file, we create a temporary one, we add our entry and copy the rest */
   if (fread(&count, 1, 1, f) != 1) {
      display_last_error("Unable to read history header.");
      fclose(f);
      return -1;
   }
   if (count > MAX_ENTRY_LOG) {
      ast_log(LOG_WARNING, "Invalid count in history header of %s (%d max %d)\n", tmp,
            count, MAX_ENTRY_LOG);
      fclose(f);
      return -1;
   }
   snprintf(tmp2, sizeof(tmp2), "%s/%s/%s-%c.csv.tmp", ast_config_AST_LOG_DIR,
          USTM_LOG_DIR, pte->device->name, way);
   if (!(f2 = fopen(tmp2, "w"))) {
      display_last_error("Unable to create temporary history log.");
      fclose(f);
      return -1;
   }

   if (++count > MAX_ENTRY_LOG)
      count = MAX_ENTRY_LOG;

   if (write_entry_history(pte, f2, count, line1)) {
      fclose(f);
      fclose(f2);
      return -1;
   }

   size = (MAX_ENTRY_LOG - 1) * TEXT_LENGTH_MAX * 3;
   if (!(histbuf = ast_malloc(size))) {
      fclose(f);
      fclose(f2);
      return -1;
   }

   if (fread(histbuf, size, 1, f) != 1) {
      ast_free(histbuf);
      fclose(f);
      fclose(f2);
      display_last_error("Unable to read previous history entries.");
      return -1;
   }
   if (fwrite(histbuf, size, 1, f2) != 1) {
      ast_free(histbuf);
      fclose(f);
      fclose(f2);
      display_last_error("Unable to write previous history entries.");
      return -1;
   }
   ast_free(histbuf);
   if (fclose(f))
      display_last_error("Unable to close history log.");
   if (fclose(f2))
      display_last_error("Unable to close temporary history log.");
   if (unlink(tmp))
      display_last_error("Unable to remove old history log.");
   if (rename(tmp2, tmp))
      display_last_error("Unable to rename new history log.");
   return 0;
}

static void cancel_dial(struct unistimsession *pte)
{
   send_no_ring(pte);
   pte->device->missed_call++;
   write_history(pte, 'i', 1);
   show_main_page(pte);
   return;
}

static void swap_subs(struct unistim_line *p, int a, int b)
{
/*  struct ast_channel *towner; */
   struct ast_rtp *rtp;
   int fds;

   if (unistimdebug)
      ast_verb(0, "Swapping %d and %d\n", a, b);

   if ((!p->subs[a]->owner) || (!p->subs[b]->owner)) {
      ast_log(LOG_WARNING,
            "Attempted to swap subchannels with a null owner : sub #%d=%p sub #%d=%p\n",
            a, p->subs[a]->owner, b, p->subs[b]->owner);
      return;
   }
   rtp = p->subs[a]->rtp;
   p->subs[a]->rtp = p->subs[b]->rtp;
   p->subs[b]->rtp = rtp;

   fds = p->subs[a]->owner->fds[0];
   p->subs[a]->owner->fds[0] = p->subs[b]->owner->fds[0];
   p->subs[b]->owner->fds[0] = fds;

   fds = p->subs[a]->owner->fds[1];
   p->subs[a]->owner->fds[1] = p->subs[b]->owner->fds[1];
   p->subs[b]->owner->fds[1] = fds;
}

static int attempt_transfer(struct unistim_subchannel *p1, struct unistim_subchannel *p2)
{
   int res = 0;
   struct ast_channel
    *chana = NULL, *chanb = NULL, *bridgea = NULL, *bridgeb = NULL, *peera =
      NULL, *peerb = NULL, *peerc = NULL, *peerd = NULL;

   if (!p1->owner || !p2->owner) {
      ast_log(LOG_WARNING, "Transfer attempted without dual ownership?\n");
      return -1;
   }
   chana = p1->owner;
   chanb = p2->owner;
   bridgea = ast_bridged_channel(chana);
   bridgeb = ast_bridged_channel(chanb);

   if (bridgea) {
      peera = chana;
      peerb = chanb;
      peerc = bridgea;
      peerd = bridgeb;
   } else if (bridgeb) {
      peera = chanb;
      peerb = chana;
      peerc = bridgeb;
      peerd = bridgea;
   }

   if (peera && peerb && peerc && (peerb != peerc)) {
      /*ast_quiet_chan(peera);
         ast_quiet_chan(peerb);
         ast_quiet_chan(peerc);
         ast_quiet_chan(peerd); */

      if (peera->cdr && peerb->cdr) {
         peerb->cdr = ast_cdr_append(peerb->cdr, peera->cdr);
      } else if (peera->cdr) {
         peerb->cdr = peera->cdr;
      }
      peera->cdr = NULL;

      if (peerb->cdr && peerc->cdr) {
         peerb->cdr = ast_cdr_append(peerb->cdr, peerc->cdr);
      } else if (peerc->cdr) {
         peerb->cdr = peerc->cdr;
      }
      peerc->cdr = NULL;

      if (ast_channel_masquerade(peerb, peerc)) {
         ast_log(LOG_WARNING, "Failed to masquerade %s into %s\n", peerb->name,
               peerc->name);
         res = -1;
      }
      return res;
   } else {
      ast_log(LOG_NOTICE,
            "Transfer attempted with no appropriate bridged calls to transfer\n");
      if (chana)
         ast_softhangup_nolock(chana, AST_SOFTHANGUP_DEV);
      if (chanb)
         ast_softhangup_nolock(chanb, AST_SOFTHANGUP_DEV);
      return -1;
   }
   return 0;
}

void change_callerid(struct unistimsession *pte, int type, char *callerid)
{
   char *data;
   int size;

   if (type)
      data = pte->device->lst_cnm;
   else
      data = pte->device->lst_cid;

   /* This is very nearly strncpy(), except that the remaining buffer
    * is padded with ' ', instead of '\0' */
   memset(data, ' ', TEXT_LENGTH_MAX);
   size = strlen(callerid);
   if (size > TEXT_LENGTH_MAX)
      size = TEXT_LENGTH_MAX;
   memcpy(data, callerid, size);
}

static void close_call(struct unistimsession *pte)
{
   struct unistim_subchannel *sub;
   struct unistim_line *l = pte->device->lines;

   sub = pte->device->lines->subs[SUB_REAL];
   send_stop_timer(pte);
   if (sub->owner) {
      sub->alreadygone = 1;
      if (l->subs[SUB_THREEWAY]) {
         l->subs[SUB_THREEWAY]->alreadygone = 1;
         if (attempt_transfer(sub, l->subs[SUB_THREEWAY]) < 0)
            ast_verb(0, "attempt_transfer failed.\n");
      } else
         ast_queue_hangup(sub->owner);
   } else {
      if (l->subs[SUB_THREEWAY]) {
         if (l->subs[SUB_THREEWAY]->owner)
            ast_queue_hangup_with_cause(l->subs[SUB_THREEWAY]->owner, AST_CAUSE_NORMAL_CLEARING);
         else
            ast_log(LOG_WARNING, "threeway sub without owner\n");
      } else
         ast_verb(0, "USTM(%s@%s-%d) channel already destroyed\n", sub->parent->name,
                  sub->parent->parent->name, sub->subtype);
   }
   change_callerid(pte, 0, pte->device->redial_number);
   change_callerid(pte, 1, "");
   write_history(pte, 'o', pte->device->missed_call);
   pte->device->missed_call = 0;
   show_main_page(pte);
   return;
}

static void IgnoreCall(struct unistimsession *pte)
{
   send_no_ring(pte);
   return;
}

static void *unistim_ss(void *data)
{
   struct ast_channel *chan = data;
   struct unistim_subchannel *sub = chan->tech_pvt;
   struct unistim_line *l = sub->parent;
   struct unistimsession *s = l->parent->session;
   int res;

   ast_verb(3, "Starting switch on '%s@%s-%d' to %s\n", l->name, l->parent->name, sub->subtype, s->device->phone_number);
   ast_copy_string(chan->exten, s->device->phone_number, sizeof(chan->exten));
   ast_copy_string(s->device->redial_number, s->device->phone_number,
               sizeof(s->device->redial_number));
   ast_setstate(chan, AST_STATE_RING);
   res = ast_pbx_run(chan);
   if (res) {
      ast_log(LOG_WARNING, "PBX exited non-zero\n");
      send_tone(s, 1000, 0);;
   }
   return NULL;
}

static void start_rtp(struct unistim_subchannel *sub)
{
   BUFFSEND;
   struct sockaddr_in us;
   struct sockaddr_in public;
   struct sockaddr_in sin;
   int codec;
   struct sockaddr_in sout;

   /* Sanity checks */
   if (!sub) {
      ast_log(LOG_WARNING, "start_rtp with a null subchannel !\n");
      return;
   }
   if (!sub->parent) {
      ast_log(LOG_WARNING, "start_rtp with a null line !\n");
      return;
   }
   if (!sub->parent->parent) {
      ast_log(LOG_WARNING, "start_rtp with a null device !\n");
      return;
   }
   if (!sub->parent->parent->session) {
      ast_log(LOG_WARNING, "start_rtp with a null session !\n");
      return;
   }
   sout = sub->parent->parent->session->sout;

   ast_mutex_lock(&sub->lock);
   /* Allocate the RTP */
   if (unistimdebug)
      ast_verb(0, "Starting RTP. Bind on %s\n", ast_inet_ntoa(sout.sin_addr));
   sub->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, sout.sin_addr);
   if (!sub->rtp) {
      ast_log(LOG_WARNING, "Unable to create RTP session: %s binaddr=%s\n",
            strerror(errno), ast_inet_ntoa(sout.sin_addr));
      ast_mutex_unlock(&sub->lock);
      return;
   }
   if (sub->rtp && sub->owner) {
      sub->owner->fds[0] = ast_rtp_fd(sub->rtp);
      sub->owner->fds[1] = ast_rtcp_fd(sub->rtp);
   }
   if (sub->rtp) {
      ast_rtp_setqos(sub->rtp, qos.tos_audio, qos.cos_audio, "UNISTIM RTP");
      ast_rtp_setnat(sub->rtp, sub->parent->parent->nat);
   }

   /* Create the RTP connection */
   ast_rtp_get_us(sub->rtp, &us);
   sin.sin_family = AF_INET;
   /* Setting up RTP for our side */
   memcpy(&sin.sin_addr, &sub->parent->parent->session->sin.sin_addr,
         sizeof(sin.sin_addr));
   sin.sin_port = htons(sub->parent->parent->rtp_port);
   ast_rtp_set_peer(sub->rtp, &sin);
   if (!(sub->owner->nativeformats & sub->owner->readformat)) {
      int fmt;
      fmt = ast_best_codec(sub->owner->nativeformats);
      ast_log(LOG_WARNING,
            "Our read/writeformat has been changed to something incompatible : %s (%d), using %s (%d) best codec from %d\n",
            ast_getformatname(sub->owner->readformat),
            sub->owner->readformat, ast_getformatname(fmt), fmt,
            sub->owner->nativeformats);
      sub->owner->readformat = fmt;
      sub->owner->writeformat = fmt;
   }
   codec = ast_rtp_lookup_code(sub->rtp, 1, sub->owner->readformat);
   /* Setting up RTP of the phone */
   if (public_ip.sin_family == 0)  /* NAT IP override ?   */
      memcpy(&public, &us, sizeof(public));   /* No defined, using IP from recvmsg  */
   else
      memcpy(&public, &public_ip, sizeof(public));    /* override  */
   if (unistimdebug) {
      ast_verb(0, "RTP started : Our IP/port is : %s:%hd with codec %s (%d)\n",
          ast_inet_ntoa(us.sin_addr),
          htons(us.sin_port), ast_getformatname(sub->owner->readformat),
          sub->owner->readformat);
      ast_verb(0, "Starting phone RTP stack. Our public IP is %s\n",
               ast_inet_ntoa(public.sin_addr));
   }
   if ((sub->owner->readformat == AST_FORMAT_ULAW) ||
      (sub->owner->readformat == AST_FORMAT_ALAW)) {
      if (unistimdebug)
         ast_verb(0, "Sending packet_send_rtp_packet_size for codec %d\n", codec);
      memcpy(buffsend + SIZE_HEADER, packet_send_rtp_packet_size,
            sizeof(packet_send_rtp_packet_size));
      buffsend[10] = codec;
      send_client(SIZE_HEADER + sizeof(packet_send_rtp_packet_size), buffsend,
               sub->parent->parent->session);
   }
   if (unistimdebug)
      ast_verb(0, "Sending Jitter Buffer Parameters Configuration\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_jitter_buffer_conf,
         sizeof(packet_send_jitter_buffer_conf));
   send_client(SIZE_HEADER + sizeof(packet_send_jitter_buffer_conf), buffsend,
            sub->parent->parent->session);
   if (sub->parent->parent->rtp_method != 0) {
      uint16_t rtcpsin_port = htons(us.sin_port) + 1; /* RTCP port is RTP + 1 */

      if (unistimdebug)
         ast_verb(0, "Sending OpenAudioStreamTX using method #%d\n",
                  sub->parent->parent->rtp_method);
      if (sub->parent->parent->rtp_method == 3)
         memcpy(buffsend + SIZE_HEADER, packet_send_open_audio_stream_tx3,
               sizeof(packet_send_open_audio_stream_tx3));
      else
         memcpy(buffsend + SIZE_HEADER, packet_send_open_audio_stream_tx,
               sizeof(packet_send_open_audio_stream_tx));
      if (sub->parent->parent->rtp_method != 2) {
         memcpy(buffsend + 28, &public.sin_addr, sizeof(public.sin_addr));
         buffsend[20] = (htons(sin.sin_port) & 0xff00) >> 8;
         buffsend[21] = (htons(sin.sin_port) & 0x00ff);
         buffsend[23] = (rtcpsin_port & 0x00ff);
         buffsend[22] = (rtcpsin_port & 0xff00) >> 8;
         buffsend[25] = (us.sin_port & 0xff00) >> 8;
         buffsend[24] = (us.sin_port & 0x00ff);
         buffsend[27] = (rtcpsin_port & 0x00ff);
         buffsend[26] = (rtcpsin_port & 0xff00) >> 8;
      } else {
         memcpy(buffsend + 23, &public.sin_addr, sizeof(public.sin_addr));
         buffsend[15] = (htons(sin.sin_port) & 0xff00) >> 8;
         buffsend[16] = (htons(sin.sin_port) & 0x00ff);
         buffsend[20] = (us.sin_port & 0xff00) >> 8;
         buffsend[19] = (us.sin_port & 0x00ff);
         buffsend[11] = codec;
      }
      buffsend[12] = codec;
      send_client(SIZE_HEADER + sizeof(packet_send_open_audio_stream_tx), buffsend,
               sub->parent->parent->session);

      if (unistimdebug)
         ast_verb(0, "Sending OpenAudioStreamRX\n");
      if (sub->parent->parent->rtp_method == 3)
         memcpy(buffsend + SIZE_HEADER, packet_send_open_audio_stream_rx3,
               sizeof(packet_send_open_audio_stream_rx3));
      else
         memcpy(buffsend + SIZE_HEADER, packet_send_open_audio_stream_rx,
               sizeof(packet_send_open_audio_stream_rx));
      if (sub->parent->parent->rtp_method != 2) {
         memcpy(buffsend + 28, &public.sin_addr, sizeof(public.sin_addr));
         buffsend[20] = (htons(sin.sin_port) & 0xff00) >> 8;
         buffsend[21] = (htons(sin.sin_port) & 0x00ff);
         buffsend[23] = (rtcpsin_port & 0x00ff);
         buffsend[22] = (rtcpsin_port & 0xff00) >> 8;
         buffsend[25] = (us.sin_port & 0xff00) >> 8;
         buffsend[24] = (us.sin_port & 0x00ff);
         buffsend[27] = (rtcpsin_port & 0x00ff);
         buffsend[26] = (rtcpsin_port & 0xff00) >> 8;
      } else {
         memcpy(buffsend + 23, &public.sin_addr, sizeof(public.sin_addr));
         buffsend[15] = (htons(sin.sin_port) & 0xff00) >> 8;
         buffsend[16] = (htons(sin.sin_port) & 0x00ff);
         buffsend[20] = (us.sin_port & 0xff00) >> 8;
         buffsend[19] = (us.sin_port & 0x00ff);
         buffsend[12] = codec;
      }
      buffsend[11] = codec;
      send_client(SIZE_HEADER + sizeof(packet_send_open_audio_stream_rx), buffsend,
               sub->parent->parent->session);
   } else {
      uint16_t rtcpsin_port = htons(us.sin_port) + 1; /* RTCP port is RTP + 1 */

      if (unistimdebug)
         ast_verb(0, "Sending packet_send_call default method\n");

      memcpy(buffsend + SIZE_HEADER, packet_send_call, sizeof(packet_send_call));
      memcpy(buffsend + 53, &public.sin_addr, sizeof(public.sin_addr));
      /* Destination port when sending RTP */
      buffsend[49] = (us.sin_port & 0x00ff);
      buffsend[50] = (us.sin_port & 0xff00) >> 8;
      /* Destination port when sending RTCP */
      buffsend[52] = (rtcpsin_port & 0x00ff);
      buffsend[51] = (rtcpsin_port & 0xff00) >> 8;
      /* Codec */
      buffsend[40] = codec;
      buffsend[41] = codec;
      if (sub->owner->readformat == AST_FORMAT_ULAW)
         buffsend[42] = 1;       /* 1 = 20ms (160 bytes), 2 = 40ms (320 bytes) */
      else if (sub->owner->readformat == AST_FORMAT_ALAW)
         buffsend[42] = 1;       /* 1 = 20ms (160 bytes), 2 = 40ms (320 bytes) */
      else if (sub->owner->readformat == AST_FORMAT_G723_1)
         buffsend[42] = 2;       /* 1 = 30ms (24 bytes), 2 = 60 ms (48 bytes) */
      else if (sub->owner->readformat == AST_FORMAT_G729A)
         buffsend[42] = 2;       /* 1 = 10ms (10 bytes), 2 = 20ms (20 bytes) */
      else
         ast_log(LOG_WARNING, "Unsupported codec %s (%d) !\n",
               ast_getformatname(sub->owner->readformat), sub->owner->readformat);
      /* Source port for transmit RTP and Destination port for receiving RTP */
      buffsend[45] = (htons(sin.sin_port) & 0xff00) >> 8;
      buffsend[46] = (htons(sin.sin_port) & 0x00ff);
      buffsend[47] = (rtcpsin_port & 0xff00) >> 8;
      buffsend[48] = (rtcpsin_port & 0x00ff);
      send_client(SIZE_HEADER + sizeof(packet_send_call), buffsend,
               sub->parent->parent->session);
   }
   ast_mutex_unlock(&sub->lock);
}

static void SendDialTone(struct unistimsession *pte)
{
   int i;
   /* No country defined ? Using US tone */
   if (ast_strlen_zero(pte->device->country)) {
      if (unistimdebug)
         ast_verb(0, "No country defined, using US tone\n");
      send_tone(pte, 350, 440);
      return;
   }
   if (strlen(pte->device->country) != 2) {
      if (unistimdebug)
         ast_verb(0, "Country code != 2 char, using US tone\n");
      send_tone(pte, 350, 440);
      return;
   }
   i = 0;
   while (frequency[i].freq1) {
      if ((frequency[i].country[0] == pte->device->country[0]) &&
         (frequency[i].country[1] == pte->device->country[1])) {
         if (unistimdebug)
            ast_verb(0, "Country code found (%s), freq1=%d freq2=%d\n",
                     frequency[i].country, frequency[i].freq1, frequency[i].freq2);
         send_tone(pte, frequency[i].freq1, frequency[i].freq2);
      }
      i++;
   }
}

static void handle_dial_page(struct unistimsession *pte)
{
   pte->state = STATE_DIALPAGE;
   if (pte->device->call_forward[0] == -1) {
      send_text(TEXT_LINE0, TEXT_NORMAL, pte, "");
      send_text(TEXT_LINE1, TEXT_NORMAL, pte, "Enter forward");
      send_text_status(pte, "ForwardCancel BackSpcErase");
      if (pte->device->call_forward[1] != 0) {
         char tmp[TEXT_LENGTH_MAX + 1];

         ast_copy_string(pte->device->phone_number, pte->device->call_forward + 1,
                     sizeof(pte->device->phone_number));
         pte->device->size_phone_number = strlen(pte->device->phone_number);
         if (pte->device->size_phone_number > 15)
            pte->device->size_phone_number = 15;
         strcpy(tmp, "Number : ...............");
         memcpy(tmp + 9, pte->device->phone_number, pte->device->size_phone_number);
         send_text(TEXT_LINE2, TEXT_NORMAL, pte, tmp);
         send_blink_cursor(pte);
         send_cursor_pos(pte,
                    (unsigned char) (TEXT_LINE2 + 0x09 +
                                 pte->device->size_phone_number));
         send_led_update(pte, 0);
         return;
      }
   } else {
      if ((pte->device->output == OUTPUT_HANDSET) &&
         (pte->device->receiver_state == STATE_ONHOOK))
         send_select_output(pte, OUTPUT_SPEAKER, pte->device->volume, MUTE_OFF);
      else
         send_select_output(pte, pte->device->output, pte->device->volume, MUTE_OFF);
      SendDialTone(pte);
      send_text(TEXT_LINE0, TEXT_NORMAL, pte, "Enter the number to dial");
      send_text(TEXT_LINE1, TEXT_NORMAL, pte, "and press Call");
      send_text_status(pte, "Call   Redial BackSpcErase");
   }
   send_text(TEXT_LINE2, TEXT_NORMAL, pte, "Number : ...............");
   send_blink_cursor(pte);
   send_cursor_pos(pte, TEXT_LINE2 + 0x09);
   pte->device->size_phone_number = 0;
   pte->device->phone_number[0] = 0;
   change_favorite_icon(pte, FAV_ICON_PHONE_BLACK);
   Sendicon(TEXT_LINE0, FAV_ICON_NONE, pte);
   pte->device->missed_call = 0;
   send_led_update(pte, 0);
   return;
}

/* Step 1 : Music On Hold for peer, Dialing screen for us */
static void TransferCallStep1(struct unistimsession *pte)
{
   struct unistim_subchannel *sub;
   struct unistim_line *p = pte->device->lines;

   sub = p->subs[SUB_REAL];

   if (!sub->owner) {
      ast_log(LOG_WARNING, "Unable to find subchannel for music on hold\n");
      return;
   }
   if (p->subs[SUB_THREEWAY]) {
      if (unistimdebug)
         ast_verb(0, "Transfer canceled, hangup our threeway channel\n");
      if (p->subs[SUB_THREEWAY]->owner)
         ast_queue_hangup_with_cause(p->subs[SUB_THREEWAY]->owner, AST_CAUSE_NORMAL_CLEARING);
      else
         ast_log(LOG_WARNING, "Canceling a threeway channel without owner\n");
      return;
   }
   /* Start music on hold if appropriate */
   if (pte->device->moh)
      ast_log(LOG_WARNING, "Transfer with peer already listening music on hold\n");
   else {
      if (ast_bridged_channel(p->subs[SUB_REAL]->owner)) {
         ast_moh_start(ast_bridged_channel(p->subs[SUB_REAL]->owner),
                    pte->device->lines->musicclass, NULL);
         pte->device->moh = 1;
      } else {
         ast_log(LOG_WARNING, "Unable to find peer subchannel for music on hold\n");
         return;
      }
   }
   /* Silence our channel */
   if (!pte->device->silence_generator) {
      pte->device->silence_generator =
         ast_channel_start_silence_generator(p->subs[SUB_REAL]->owner);
      if (pte->device->silence_generator == NULL)
         ast_log(LOG_WARNING, "Unable to start a silence generator.\n");
      else if (unistimdebug)
         ast_verb(0, "Starting silence generator\n");
   }
   handle_dial_page(pte);
}

/* From phone to PBX */
static void HandleCallOutgoing(struct unistimsession *s)
{
   struct ast_channel *c;
   struct unistim_subchannel *sub;
   pthread_t t;
   s->state = STATE_CALL;
   sub = s->device->lines->subs[SUB_REAL];
   if (!sub) {
      ast_log(LOG_NOTICE, "No available lines on: %s\n", s->device->name);
      return;
   }
   if (!sub->owner) {            /* A call is already in progress ? */
      c = unistim_new(sub, AST_STATE_DOWN);   /* No, starting a new one */
      if (c) {
         /* Need to start RTP before calling ast_pbx_run */
         if (!sub->rtp)
            start_rtp(sub);
         send_select_output(s, s->device->output, s->device->volume, MUTE_OFF);
         send_text(TEXT_LINE0, TEXT_NORMAL, s, "Calling :");
         send_text(TEXT_LINE1, TEXT_NORMAL, s, s->device->phone_number);
         send_text(TEXT_LINE2, TEXT_NORMAL, s, "Dialing...");
         send_text_status(s, "Hangup");
         /* start switch */
         if (ast_pthread_create(&t, NULL, unistim_ss, c)) {
            display_last_error("Unable to create switch thread");
            ast_queue_hangup_with_cause(c, AST_CAUSE_SWITCH_CONGESTION);
         }
      } else
         ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n",
               sub->parent->name, s->device->name);
   } else {             /* We already have a call, so we switch in a threeway call */

      if (s->device->moh) {
         struct unistim_subchannel *subchannel;
         struct unistim_line *p = s->device->lines;
         subchannel = p->subs[SUB_REAL];

         if (!subchannel->owner) {
            ast_log(LOG_WARNING, "Unable to find subchannel for music on hold\n");
            return;
         }
         if (p->subs[SUB_THREEWAY]) {
            ast_log(LOG_WARNING,
                  "Can't transfer while an another transfer is taking place\n");
            return;
         }
         if (!alloc_sub(p, SUB_THREEWAY)) {
            ast_log(LOG_WARNING, "Unable to allocate three-way subchannel\n");
            return;
         }
         /* Stop the silence generator */
         if (s->device->silence_generator) {
            if (unistimdebug)
               ast_verb(0, "Stopping silence generator\n");
            ast_channel_stop_silence_generator(subchannel->owner,
                                       s->device->silence_generator);
            s->device->silence_generator = NULL;
         }
         send_tone(s, 0, 0);
         /* Make new channel */
         c = unistim_new(p->subs[SUB_THREEWAY], AST_STATE_DOWN);
         if (!c) {
            ast_log(LOG_WARNING, "Cannot allocate new structure on channel %p\n", p);
            return;
         }
         /* Swap things around between the three-way and real call */
         swap_subs(p, SUB_THREEWAY, SUB_REAL);
         send_select_output(s, s->device->output, s->device->volume, MUTE_OFF);
         send_text(TEXT_LINE0, TEXT_NORMAL, s, "Calling (pre-transfer)");
         send_text(TEXT_LINE1, TEXT_NORMAL, s, s->device->phone_number);
         send_text(TEXT_LINE2, TEXT_NORMAL, s, "Dialing...");
         send_text_status(s, "TransfrCancel");

         if (ast_pthread_create(&t, NULL, unistim_ss, p->subs[SUB_THREEWAY]->owner)) {
            ast_log(LOG_WARNING, "Unable to start simple switch on channel %p\n", p);
            ast_hangup(c);
            return;
         }
         if (unistimdebug)
            ast_verb(0, "Started three way call on channel %p (%s) subchan %d\n",
                p->subs[SUB_THREEWAY]->owner, p->subs[SUB_THREEWAY]->owner->name,
                p->subs[SUB_THREEWAY]->subtype);
      } else
         ast_debug(1, "Current sub [%s] already has owner\n", sub->owner->name);
   }
   return;
}

/* From PBX to phone */
static void HandleCallIncoming(struct unistimsession *s)
{
   struct unistim_subchannel *sub;
   s->state = STATE_CALL;
   s->device->missed_call = 0;
   send_no_ring(s);
   sub = s->device->lines->subs[SUB_REAL];
   if (!sub) {
      ast_log(LOG_NOTICE, "No available lines on: %s\n", s->device->name);
      return;
   } else if (unistimdebug)
      ast_verb(0, "Handle Call Incoming for %s@%s\n", sub->parent->name,
               s->device->name);
   start_rtp(sub);
   if (!sub->rtp)
      ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", sub->parent->name,
            s->device->name);
   ast_queue_control(sub->owner, AST_CONTROL_ANSWER);
   send_text(TEXT_LINE2, TEXT_NORMAL, s, "is on-line");
   send_text_status(s, "Hangup Transf");
   send_start_timer(s);

   if ((s->device->output == OUTPUT_HANDSET) &&
      (s->device->receiver_state == STATE_ONHOOK))
      send_select_output(s, OUTPUT_SPEAKER, s->device->volume, MUTE_OFF);
   else
      send_select_output(s, s->device->output, s->device->volume, MUTE_OFF);
   s->device->start_call_timestamp = time(0);
   write_history(s, 'i', 0);
   return;
}

static int unistim_do_senddigit(struct unistimsession *pte, char digit)
{
   struct ast_frame f = { .frametype = AST_FRAME_DTMF, .subclass = digit, .src = "unistim" };
   struct unistim_subchannel *sub;
   sub = pte->device->lines->subs[SUB_REAL];
   if (!sub->owner || sub->alreadygone) {
      ast_log(LOG_WARNING, "Unable to find subchannel in dtmf senddigit\n");
      return -1;
   }

   /* Send DTMF indication _before_ playing sounds */
   ast_queue_frame(sub->owner, &f);

   if (unistimdebug)
      ast_verb(0, "Send Digit %c\n", digit);
   switch (digit) {
   case '0':
      send_tone(pte, 941, 1336);
      break;
   case '1':
      send_tone(pte, 697, 1209);
      break;
   case '2':
      send_tone(pte, 697, 1336);
      break;
   case '3':
      send_tone(pte, 697, 1477);
      break;
   case '4':
      send_tone(pte, 770, 1209);
      break;
   case '5':
      send_tone(pte, 770, 1336);
      break;
   case '6':
      send_tone(pte, 770, 1477);
      break;
   case '7':
      send_tone(pte, 852, 1209);
      break;
   case '8':
      send_tone(pte, 852, 1336);
      break;
   case '9':
      send_tone(pte, 852, 1477);
      break;
   case 'A':
      send_tone(pte, 697, 1633);
      break;
   case 'B':
      send_tone(pte, 770, 1633);
      break;
   case 'C':
      send_tone(pte, 852, 1633);
      break;
   case 'D':
      send_tone(pte, 941, 1633);
      break;
   case '*':
      send_tone(pte, 941, 1209);
      break;
   case '#':
      send_tone(pte, 941, 1477);
      break;
   default:
      send_tone(pte, 500, 2000);
   }
   usleep(150000);          /* XXX Less than perfect, blocking an important thread is not a good idea */
   send_tone(pte, 0, 0);
   return 0;
}

static void key_call(struct unistimsession *pte, char keycode)
{
   if ((keycode >= KEY_0) && (keycode <= KEY_SHARP)) {
      if (keycode == KEY_SHARP)
         keycode = '#';
      else if (keycode == KEY_STAR)
         keycode = '*';
      else
         keycode -= 0x10;
      unistim_do_senddigit(pte, keycode);
      return;
   }
   switch (keycode) {
   case KEY_HANGUP:
   case KEY_FUNC1:
      close_call(pte);
      break;
   case KEY_FUNC2:
      TransferCallStep1(pte);
      break;
   case KEY_HEADPHN:
      if (pte->device->output == OUTPUT_HEADPHONE)
         send_select_output(pte, OUTPUT_HANDSET, pte->device->volume, MUTE_OFF);
      else
         send_select_output(pte, OUTPUT_HEADPHONE, pte->device->volume, MUTE_OFF);
      break;
   case KEY_LOUDSPK:
      if (pte->device->output != OUTPUT_SPEAKER)
         send_select_output(pte, OUTPUT_SPEAKER, pte->device->volume, MUTE_OFF);
      else
         send_select_output(pte, pte->device->previous_output, pte->device->volume,
                      MUTE_OFF);
      break;
   case KEY_MUTE:
      if (!pte->device->moh) {
         if (pte->device->mute == MUTE_ON)
            send_select_output(pte, pte->device->output, pte->device->volume, MUTE_OFF);
         else
            send_select_output(pte, pte->device->output, pte->device->volume, MUTE_ON);
         break;
      }
   case KEY_ONHOLD:
      {
         struct unistim_subchannel *sub;
         struct ast_channel *bridgepeer = NULL;
         sub = pte->device->lines->subs[SUB_REAL];
         if (!sub->owner) {
            ast_log(LOG_WARNING, "Unable to find subchannel for music on hold\n");
            return;
         }
         if ((bridgepeer = ast_bridged_channel(sub->owner))) {
            if (pte->device->moh) {
               ast_moh_stop(bridgepeer);
               pte->device->moh = 0;
               send_select_output(pte, pte->device->output, pte->device->volume,
                            MUTE_OFF);
            } else {
               ast_moh_start(bridgepeer, pte->device->lines->musicclass, NULL);
               pte->device->moh = 1;
               send_select_output(pte, pte->device->output, pte->device->volume,
                            MUTE_ON);
            }
         } else
            ast_log(LOG_WARNING,
                  "Unable to find peer subchannel for music on hold\n");
         break;
      }
   }
   return;
}

static void key_ringing(struct unistimsession *pte, char keycode)
{
   if (keycode == KEY_FAV0 + pte->device->softkeylinepos) {
      HandleCallIncoming(pte);
      return;
   }
   switch (keycode) {
   case KEY_HANGUP:
   case KEY_FUNC4:
      IgnoreCall(pte);
      break;
   case KEY_FUNC1:
      HandleCallIncoming(pte);
      break;
   }
   return;
}

static void Keyfavorite(struct unistimsession *pte, char keycode)
{
   int fav;

   if ((keycode < KEY_FAV1) && (keycode > KEY_FAV5)) {
      ast_log(LOG_WARNING, "It's not a favorite key\n");
      return;
   }
   if (keycode == KEY_FAV0)
      return;
   fav = keycode - KEY_FAV0;
   if (pte->device->softkeyicon[fav] == 0)
      return;
   ast_copy_string(pte->device->phone_number, pte->device->softkeynumber[fav],
               sizeof(pte->device->phone_number));
   HandleCallOutgoing(pte);
   return;
}

static void key_dial_page(struct unistimsession *pte, char keycode)
{
   if (keycode == KEY_FUNC3) {
      if (pte->device->size_phone_number <= 1)
         keycode = KEY_FUNC4;
      else {
         pte->device->size_phone_number -= 2;
         keycode = pte->device->phone_number[pte->device->size_phone_number] + 0x10;
      }
   }
   if ((keycode >= KEY_0) && (keycode <= KEY_SHARP)) {
      char tmpbuf[] = "Number : ...............";
      int i = 0;

      if (pte->device->size_phone_number >= 15)
         return;
      if (pte->device->size_phone_number == 0)
         send_tone(pte, 0, 0);
      while (i < pte->device->size_phone_number) {
         tmpbuf[i + 9] = pte->device->phone_number[i];
         i++;
      }
      if (keycode == KEY_SHARP)
         keycode = '#';
      else if (keycode == KEY_STAR)
         keycode = '*';
      else
         keycode -= 0x10;
      tmpbuf[i + 9] = keycode;
      pte->device->phone_number[i] = keycode;
      pte->device->size_phone_number++;
      pte->device->phone_number[i + 1] = 0;
      send_text(TEXT_LINE2, TEXT_NORMAL, pte, tmpbuf);
      send_blink_cursor(pte);
      send_cursor_pos(pte, (unsigned char) (TEXT_LINE2 + 0x0a + i));
      return;
   }
   if (keycode == KEY_FUNC4) {

      pte->device->size_phone_number = 0;
      send_text(TEXT_LINE2, TEXT_NORMAL, pte, "Number : ...............");
      send_blink_cursor(pte);
      send_cursor_pos(pte, TEXT_LINE2 + 0x09);
      return;
   }

   if (pte->device->call_forward[0] == -1) {
      if (keycode == KEY_FUNC1) {
         ast_copy_string(pte->device->call_forward, pte->device->phone_number,
                     sizeof(pte->device->call_forward));
         show_main_page(pte);
      } else if ((keycode == KEY_FUNC2) || (keycode == KEY_HANGUP)) {
         pte->device->call_forward[0] = '\0';
         show_main_page(pte);
      }
      return;
   }
   switch (keycode) {
   case KEY_FUNC2:
      if (ast_strlen_zero(pte->device->redial_number))
         break;
      ast_copy_string(pte->device->phone_number, pte->device->redial_number,
                  sizeof(pte->device->phone_number));
   case KEY_FUNC1:
      HandleCallOutgoing(pte);
      break;
   case KEY_HANGUP:
      if (pte->device->lines->subs[SUB_REAL]->owner) {
         /* Stop the silence generator */
         if (pte->device->silence_generator) {
            if (unistimdebug)
               ast_verb(0, "Stopping silence generator\n");
            ast_channel_stop_silence_generator(pte->device->lines->subs[SUB_REAL]->
                                       owner, pte->device->silence_generator);
            pte->device->silence_generator = NULL;
         }
         send_tone(pte, 0, 0);
         ast_moh_stop(ast_bridged_channel(pte->device->lines->subs[SUB_REAL]->owner));
         pte->device->moh = 0;
         pte->state = STATE_CALL;
         send_text(TEXT_LINE0, TEXT_NORMAL, pte, "Dialing canceled,");
         send_text(TEXT_LINE1, TEXT_NORMAL, pte, "switching back to");
         send_text(TEXT_LINE2, TEXT_NORMAL, pte, "previous call.");
         send_text_status(pte, "Hangup Transf");
      } else
         show_main_page(pte);
      break;
   case KEY_FAV1:
   case KEY_FAV2:
   case KEY_FAV3:
   case KEY_FAV4:
   case KEY_FAV5:
      Keyfavorite(pte, keycode);
      break;
   case KEY_LOUDSPK:
      if (pte->device->output == OUTPUT_SPEAKER) {
         if (pte->device->receiver_state == STATE_OFFHOOK)
            send_select_output(pte, pte->device->previous_output, pte->device->volume,
                         MUTE_OFF);
         else
            show_main_page(pte);
      } else
         send_select_output(pte, OUTPUT_SPEAKER, pte->device->volume, MUTE_OFF);
      break;
   case KEY_HEADPHN:
      if (pte->device->output == OUTPUT_HEADPHONE) {
         if (pte->device->receiver_state == STATE_OFFHOOK)
            send_select_output(pte, OUTPUT_HANDSET, pte->device->volume, MUTE_OFF);
         else
            show_main_page(pte);
      } else
         send_select_output(pte, OUTPUT_HEADPHONE, pte->device->volume, MUTE_OFF);
      break;
   }
   return;
}

#define SELECTCODEC_START_ENTRY_POS 15
#define SELECTCODEC_MAX_LENGTH 2
#define SELECTCODEC_MSG "Codec number : .."
static void HandleSelectCodec(struct unistimsession *pte)
{
   char buf[30], buf2[5];

   pte->state = STATE_SELECTCODEC;
   strcpy(buf, "Using codec ");
   sprintf(buf2, "%d", pte->device->codec_number);
   strcat(buf, buf2);
   strcat(buf, " (G711u=0,");

   send_text(TEXT_LINE0, TEXT_NORMAL, pte, buf);
   send_text(TEXT_LINE1, TEXT_NORMAL, pte, "G723=4,G711a=8,G729A=18)");
   send_text(TEXT_LINE2, TEXT_INVERSE, pte, SELECTCODEC_MSG);
   send_blink_cursor(pte);
   send_cursor_pos(pte, TEXT_LINE2 + SELECTCODEC_START_ENTRY_POS);
   pte->size_buff_entry = 0;
   send_text_status(pte, "Select BackSpcErase  Cancel");
   return;
}

static void key_select_codec(struct unistimsession *pte, char keycode)
{
   if (keycode == KEY_FUNC2) {
      if (pte->size_buff_entry <= 1)
         keycode = KEY_FUNC3;
      else {
         pte->size_buff_entry -= 2;
         keycode = pte->buff_entry[pte->size_buff_entry] + 0x10;
      }
   }
   if ((keycode >= KEY_0) && (keycode <= KEY_9)) {
      char tmpbuf[] = SELECTCODEC_MSG;
      int i = 0;

      if (pte->size_buff_entry >= SELECTCODEC_MAX_LENGTH)
         return;

      while (i < pte->size_buff_entry) {
         tmpbuf[i + SELECTCODEC_START_ENTRY_POS] = pte->buff_entry[i];
         i++;
      }
      tmpbuf[i + SELECTCODEC_START_ENTRY_POS] = keycode - 0x10;
      pte->buff_entry[i] = keycode - 0x10;
      pte->size_buff_entry++;
      send_text(TEXT_LINE2, TEXT_INVERSE, pte, tmpbuf);
      send_blink_cursor(pte);
      send_cursor_pos(pte,
                 (unsigned char) (TEXT_LINE2 + SELECTCODEC_START_ENTRY_POS + 1 + i));
      return;
   }

   switch (keycode) {
   case KEY_FUNC1:
      if (pte->size_buff_entry == 1)
         pte->device->codec_number = pte->buff_entry[0] - 48;
      else if (pte->size_buff_entry == 2)
         pte->device->codec_number =
            ((pte->buff_entry[0] - 48) * 10) + (pte->buff_entry[1] - 48);
      show_main_page(pte);
      break;
   case KEY_FUNC3:
      pte->size_buff_entry = 0;
      send_text(TEXT_LINE2, TEXT_INVERSE, pte, SELECTCODEC_MSG);
      send_blink_cursor(pte);
      send_cursor_pos(pte, TEXT_LINE2 + SELECTCODEC_START_ENTRY_POS);
      break;
   case KEY_HANGUP:
   case KEY_FUNC4:
      show_main_page(pte);
      break;
   }
   return;
}

#define SELECTEXTENSION_START_ENTRY_POS 0
#define SELECTEXTENSION_MAX_LENGTH 10
#define SELECTEXTENSION_MSG ".........."
static void ShowExtensionPage(struct unistimsession *pte)
{
   pte->state = STATE_EXTENSION;

   send_text(TEXT_LINE0, TEXT_NORMAL, pte, "Please enter a Terminal");
   send_text(TEXT_LINE1, TEXT_NORMAL, pte, "Number (TN) :");
   send_text(TEXT_LINE2, TEXT_NORMAL, pte, SELECTEXTENSION_MSG);
   send_blink_cursor(pte);
   send_cursor_pos(pte, TEXT_LINE2 + SELECTEXTENSION_START_ENTRY_POS);
   send_text_status(pte, "Enter  BackSpcErase");
   pte->size_buff_entry = 0;
   return;
}

static void key_select_extension(struct unistimsession *pte, char keycode)
{
   if (keycode == KEY_FUNC2) {
      if (pte->size_buff_entry <= 1)
         keycode = KEY_FUNC3;
      else {
         pte->size_buff_entry -= 2;
         keycode = pte->buff_entry[pte->size_buff_entry] + 0x10;
      }
   }
   if ((keycode >= KEY_0) && (keycode <= KEY_9)) {
      char tmpbuf[] = SELECTEXTENSION_MSG;
      int i = 0;

      if (pte->size_buff_entry >= SELECTEXTENSION_MAX_LENGTH)
         return;

      while (i < pte->size_buff_entry) {
         tmpbuf[i + SELECTEXTENSION_START_ENTRY_POS] = pte->buff_entry[i];
         i++;
      }
      tmpbuf[i + SELECTEXTENSION_START_ENTRY_POS] = keycode - 0x10;
      pte->buff_entry[i] = keycode - 0x10;
      pte->size_buff_entry++;
      send_text(TEXT_LINE2, TEXT_NORMAL, pte, tmpbuf);
      send_blink_cursor(pte);
      send_cursor_pos(pte,
                 (unsigned char) (TEXT_LINE2 + SELECTEXTENSION_START_ENTRY_POS + 1 +
                              i));
      return;
   }

   switch (keycode) {
   case KEY_FUNC1:
      if (pte->size_buff_entry < 1)
         return;
      if (autoprovisioning == AUTOPROVISIONING_TN) {
         struct unistim_device *d;

         /* First step : looking for this TN in our device list */
         ast_mutex_lock(&devicelock);
         d = devices;
         pte->buff_entry[pte->size_buff_entry] = '\0';
         while (d) {
            if (d->id[0] == 'T') {  /* It's a TN device ? */
               /* It's the TN we're looking for ? */
               if (!strcmp((d->id) + 1, pte->buff_entry)) {
                  pte->device = d;
                  d->session = pte;
                  d->codec_number = DEFAULT_CODEC;
                  d->pos_fav = 0;
                  d->missed_call = 0;
                  d->receiver_state = STATE_ONHOOK;
                  strcpy(d->id, pte->macaddr);
                  pte->device->extension_number[0] = 'T';
                  pte->device->extension = EXTENSION_TN;
                  ast_copy_string((pte->device->extension_number) + 1,
                              pte->buff_entry, pte->size_buff_entry + 1);
                  ast_mutex_unlock(&devicelock);
                  show_main_page(pte);
                  refresh_all_favorite(pte);
                  return;
               }
            }
            d = d->next;
         }
         ast_mutex_unlock(&devicelock);
         send_text(TEXT_LINE0, TEXT_NORMAL, pte, "Invalid Terminal Number.");
         send_text(TEXT_LINE1, TEXT_NORMAL, pte, "Please try again :");
         send_cursor_pos(pte,
                    (unsigned char) (TEXT_LINE2 + SELECTEXTENSION_START_ENTRY_POS +
                                 pte->size_buff_entry));
         send_blink_cursor(pte);
      } else {
         ast_copy_string(pte->device->extension_number, pte->buff_entry,
                     pte->size_buff_entry + 1);
         if (RegisterExtension(pte)) {
            send_text(TEXT_LINE0, TEXT_NORMAL, pte, "Invalid extension.");
            send_text(TEXT_LINE1, TEXT_NORMAL, pte, "Please try again :");
            send_cursor_pos(pte,
                       (unsigned char) (TEXT_LINE2 +
                                    SELECTEXTENSION_START_ENTRY_POS +
                                    pte->size_buff_entry));
            send_blink_cursor(pte);
         } else
            show_main_page(pte);
      }
      break;
   case KEY_FUNC3:
      pte->size_buff_entry = 0;
      send_text(TEXT_LINE2, TEXT_NORMAL, pte, SELECTEXTENSION_MSG);
      send_blink_cursor(pte);
      send_cursor_pos(pte, TEXT_LINE2 + SELECTEXTENSION_START_ENTRY_POS);
      break;
   }
   return;
}

static int ReformatNumber(char *number)
{
   int pos = 0, i = 0, size = strlen(number);

   for (; i < size; i++) {
      if ((number[i] >= '0') && (number[i] <= '9')) {
         if (i == pos) {
            pos++;
            continue;
         }
         number[pos] = number[i];
         pos++;
      }
   }
   number[pos] = 0;
   return pos;
}

static void show_entry_history(struct unistimsession *pte, FILE ** f)
{
   char line[TEXT_LENGTH_MAX + 1], status[STATUS_LENGTH_MAX + 1], func1[10], func2[10],
      func3[10];

   if (fread(line, TEXT_LENGTH_MAX, 1, *f) != 1) {
      display_last_error("Can't read history date entry");
      fclose(*f);
      return;
   }
   line[sizeof(line) - 1] = '\0';
   send_text(TEXT_LINE0, TEXT_NORMAL, pte, line);
   if (fread(line, TEXT_LENGTH_MAX, 1, *f) != 1) {
      display_last_error("Can't read callerid entry");
      fclose(*f);
      return;
   }
   line[sizeof(line) - 1] = '\0';
   ast_copy_string(pte->device->lst_cid, line, sizeof(pte->device->lst_cid));
   send_text(TEXT_LINE1, TEXT_NORMAL, pte, line);
   if (fread(line, TEXT_LENGTH_MAX, 1, *f) != 1) {
      display_last_error("Can't read callername entry");
      fclose(*f);
      return;
   }
   line[sizeof(line) - 1] = '\0';
   send_text(TEXT_LINE2, TEXT_NORMAL, pte, line);
   fclose(*f);

   snprintf(line, sizeof(line), "Call %03d/%03d", pte->buff_entry[2],
          pte->buff_entry[1]);
   send_texttitle(pte, line);

   if (pte->buff_entry[2] == 1)
      strcpy(func1, "       ");
   else
      strcpy(func1, "Prvious");
   if (pte->buff_entry[2] >= pte->buff_entry[1])
      strcpy(func2, "       ");
   else
      strcpy(func2, "Next   ");
   if (ReformatNumber(pte->device->lst_cid))
      strcpy(func3, "Redial ");
   else
      strcpy(func3, "       ");
   snprintf(status, sizeof(status), "%s%s%sCancel", func1, func2, func3);
   send_text_status(pte, status);
}

static char OpenHistory(struct unistimsession *pte, char way, FILE ** f)
{
   char tmp[AST_CONFIG_MAX_PATH];
   char count;

   snprintf(tmp, sizeof(tmp), "%s/%s/%s-%c.csv", ast_config_AST_LOG_DIR,
          USTM_LOG_DIR, pte->device->name, way);
   *f = fopen(tmp, "r");
   if (!*f) {
      display_last_error("Unable to open history file");
      return 0;
   }
   if (fread(&count, 1, 1, *f) != 1) {
      display_last_error("Unable to read history header - display.");
      fclose(*f);
      return 0;
   }
   if (count > MAX_ENTRY_LOG) {
      ast_log(LOG_WARNING, "Invalid count in history header of %s (%d max %d)\n", tmp,
            count, MAX_ENTRY_LOG);
      fclose(*f);
      return 0;
   }
   return count;
}

static void show_history(struct unistimsession *pte, char way)
{
   FILE *f;
   char count;

   if (!pte->device)
      return;
   if (!pte->device->callhistory)
      return;
   count = OpenHistory(pte, way, &f);
   if (!count)
      return;
   pte->buff_entry[0] = way;
   pte->buff_entry[1] = count;
   pte->buff_entry[2] = 1;
   show_entry_history(pte, &f);
   pte->state = STATE_HISTORY;
}

static void show_main_page(struct unistimsession *pte)
{
   char tmpbuf[TEXT_LENGTH_MAX + 1];


   if ((pte->device->extension == EXTENSION_ASK) &&
      (ast_strlen_zero(pte->device->extension_number))) {
      ShowExtensionPage(pte);
      return;
   }

   pte->state = STATE_MAINPAGE;

   send_tone(pte, 0, 0);
   send_select_output(pte, pte->device->output, pte->device->volume, MUTE_ON_DISCRET);
   pte->device->lines->lastmsgssent = 0;
   send_favorite(pte->device->softkeylinepos, FAV_ICON_ONHOOK_BLACK, pte,
             pte->device->softkeylabel[pte->device->softkeylinepos]);
   if (!ast_strlen_zero(pte->device->call_forward)) {
      send_text(TEXT_LINE0, TEXT_NORMAL, pte, "Call forwarded to :");
      send_text(TEXT_LINE1, TEXT_NORMAL, pte, pte->device->call_forward);
      Sendicon(TEXT_LINE0, FAV_ICON_REFLECT + FAV_BLINK_SLOW, pte);
      send_text_status(pte, "Dial   Redial NoForwd");
   } else {
      if ((pte->device->extension == EXTENSION_ASK) ||
         (pte->device->extension == EXTENSION_TN))
         send_text_status(pte, "Dial   Redial ForwardUnregis");
      else
         send_text_status(pte, "Dial   Redial Forward");

      send_text(TEXT_LINE1, TEXT_NORMAL, pte, pte->device->maintext1);
      if (pte->device->missed_call == 0)
         send_text(TEXT_LINE0, TEXT_NORMAL, pte, pte->device->maintext0);
      else {
         sprintf(tmpbuf, "%d unanswered call(s)", pte->device->missed_call);
         send_text(TEXT_LINE0, TEXT_NORMAL, pte, tmpbuf);
         Sendicon(TEXT_LINE0, FAV_ICON_CALL_CENTER + FAV_BLINK_SLOW, pte);
      }
   }
   if (ast_strlen_zero(pte->device->maintext2)) {
      strcpy(tmpbuf, "IP : ");
      strcat(tmpbuf, ast_inet_ntoa(pte->sin.sin_addr));
      send_text(TEXT_LINE2, TEXT_NORMAL, pte, tmpbuf);
   } else
      send_text(TEXT_LINE2, TEXT_NORMAL, pte, pte->device->maintext2);
   send_texttitle(pte, pte->device->titledefault);
   change_favorite_icon(pte, FAV_ICON_ONHOOK_BLACK);
}

static void key_main_page(struct unistimsession *pte, char keycode)
{
   if (pte->device->missed_call) {
      Sendicon(TEXT_LINE0, FAV_ICON_NONE, pte);
      pte->device->missed_call = 0;
   }
   if ((keycode >= KEY_0) && (keycode <= KEY_SHARP)) {
      handle_dial_page(pte);
      key_dial_page(pte, keycode);
      return;
   }
   switch (keycode) {
   case KEY_FUNC1:
      handle_dial_page(pte);
      break;
   case KEY_FUNC2:
      if (ast_strlen_zero(pte->device->redial_number))
         break;
      if ((pte->device->output == OUTPUT_HANDSET) &&
         (pte->device->receiver_state == STATE_ONHOOK))
         send_select_output(pte, OUTPUT_SPEAKER, pte->device->volume, MUTE_OFF);
      else
         send_select_output(pte, pte->device->output, pte->device->volume, MUTE_OFF);

      ast_copy_string(pte->device->phone_number, pte->device->redial_number,
                  sizeof(pte->device->phone_number));
      HandleCallOutgoing(pte);
      break;
   case KEY_FUNC3:
      if (!ast_strlen_zero(pte->device->call_forward)) {
         /* Cancel call forwarding */
         memmove(pte->device->call_forward + 1, pte->device->call_forward,
               sizeof(pte->device->call_forward));
         pte->device->call_forward[0] = '\0';
         Sendicon(TEXT_LINE0, FAV_ICON_NONE, pte);
         pte->device->output = OUTPUT_HANDSET;   /* Seems to be reseted somewhere */
         show_main_page(pte);
         break;
      }
      pte->device->call_forward[0] = -1;
      handle_dial_page(pte);
      break;
   case KEY_FUNC4:
      if (pte->device->extension == EXTENSION_ASK) {
         UnregisterExtension(pte);
         pte->device->extension_number[0] = '\0';
         ShowExtensionPage(pte);
      } else if (pte->device->extension == EXTENSION_TN) {
         ast_mutex_lock(&devicelock);
         strcpy(pte->device->id, pte->device->extension_number);
         pte->buff_entry[0] = '\0';
         pte->size_buff_entry = 0;
         pte->device->session = NULL;
         pte->device = NULL;
         ast_mutex_unlock(&devicelock);
         ShowExtensionPage(pte);
      }
      break;
   case KEY_FAV0:
      handle_dial_page(pte);
      break;
   case KEY_FAV1:
   case KEY_FAV2:
   case KEY_FAV3:
   case KEY_FAV4:
   case KEY_FAV5:
      if ((pte->device->output == OUTPUT_HANDSET) &&
         (pte->device->receiver_state == STATE_ONHOOK))
         send_select_output(pte, OUTPUT_SPEAKER, pte->device->volume, MUTE_OFF);
      else
         send_select_output(pte, pte->device->output, pte->device->volume, MUTE_OFF);
      Keyfavorite(pte, keycode);
      break;
   case KEY_CONF:
      HandleSelectCodec(pte);
      break;
   case KEY_LOUDSPK:
      send_select_output(pte, OUTPUT_SPEAKER, pte->device->volume, MUTE_OFF);
      handle_dial_page(pte);
      break;
   case KEY_HEADPHN:
      send_select_output(pte, OUTPUT_HEADPHONE, pte->device->volume, MUTE_OFF);
      handle_dial_page(pte);
      break;
   case KEY_SNDHIST:
      show_history(pte, 'o');
      break;
   case KEY_RCVHIST:
      show_history(pte, 'i');
      break;
   }
   return;
}

static void key_history(struct unistimsession *pte, char keycode)
{
   FILE *f;
   char count;
   long offset;

   switch (keycode) {
   case KEY_UP:
   case KEY_LEFT:
   case KEY_FUNC1:
      if (pte->buff_entry[2] <= 1)
         return;
      pte->buff_entry[2]--;
      count = OpenHistory(pte, pte->buff_entry[0], &f);
      if (!count)
         return;
      offset = ((pte->buff_entry[2] - 1) * TEXT_LENGTH_MAX * 3);
      if (fseek(f, offset, SEEK_CUR)) {
         display_last_error("Unable to seek history entry.");
         fclose(f);
         return;
      }
      show_entry_history(pte, &f);
      break;
   case KEY_DOWN:
   case KEY_RIGHT:
   case KEY_FUNC2:
      if (pte->buff_entry[2] >= pte->buff_entry[1])
         return;
      pte->buff_entry[2]++;
      count = OpenHistory(pte, pte->buff_entry[0], &f);
      if (!count)
         return;
      offset = ((pte->buff_entry[2] - 1) * TEXT_LENGTH_MAX * 3);
      if (fseek(f, offset, SEEK_CUR)) {
         display_last_error("Unable to seek history entry.");
         fclose(f);
         return;
      }
      show_entry_history(pte, &f);
      break;
   case KEY_FUNC3:
      if (!ReformatNumber(pte->device->lst_cid))
         break;
      ast_copy_string(pte->device->redial_number, pte->device->lst_cid,
                  sizeof(pte->device->redial_number));
      key_main_page(pte, KEY_FUNC2);
      break;
   case KEY_FUNC4:
   case KEY_HANGUP:
      show_main_page(pte);
      break;
   case KEY_SNDHIST:
      if (pte->buff_entry[0] == 'i')
         show_history(pte, 'o');
      else
         show_main_page(pte);
      break;
   case KEY_RCVHIST:
      if (pte->buff_entry[0] == 'i')
         show_main_page(pte);
      else
         show_history(pte, 'i');
      break;
   }
   return;
}

static void init_phone_step2(struct unistimsession *pte)
{
   BUFFSEND;
   if (unistimdebug)
      ast_verb(0, "Sending S4\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_s4, sizeof(packet_send_s4));
   send_client(SIZE_HEADER + sizeof(packet_send_s4), buffsend, pte);
   send_date_time2(pte);
   send_date_time3(pte);
   if (unistimdebug)
      ast_verb(0, "Sending S7\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_S7, sizeof(packet_send_S7));
   send_client(SIZE_HEADER + sizeof(packet_send_S7), buffsend, pte);
   if (unistimdebug)
      ast_verb(0, "Sending Contrast\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_Contrast, sizeof(packet_send_Contrast));
   if (pte->device != NULL)
      buffsend[9] = pte->device->contrast;
   send_client(SIZE_HEADER + sizeof(packet_send_Contrast), buffsend, pte);

   if (unistimdebug)
      ast_verb(0, "Sending S9\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_s9, sizeof(packet_send_s9));
   send_client(SIZE_HEADER + sizeof(packet_send_s9), buffsend, pte);
   send_no_ring(pte);

   if (unistimdebug)
      ast_verb(0, "Sending S7\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_S7, sizeof(packet_send_S7));
   send_client(SIZE_HEADER + sizeof(packet_send_S7), buffsend, pte);
   send_led_update(pte, 0);
   send_ping(pte);
   if (pte->state < STATE_MAINPAGE) {
      if (autoprovisioning == AUTOPROVISIONING_TN) {
         ShowExtensionPage(pte);
         return;
      } else {
         int i;
         char tmp[30];

         for (i = 1; i < 6; i++)
            send_favorite(i, 0, pte, "");
         send_text(TEXT_LINE0, TEXT_NORMAL, pte, "Sorry, this phone is not");
         send_text(TEXT_LINE1, TEXT_NORMAL, pte, "registered in unistim.cfg");
         strcpy(tmp, "MAC = ");
         strcat(tmp, pte->macaddr);
         send_text(TEXT_LINE2, TEXT_NORMAL, pte, tmp);
         send_text_status(pte, "");
         send_texttitle(pte, "UNISTIM for*");
         return;
      }
   }
   show_main_page(pte);
   refresh_all_favorite(pte);
   if (unistimdebug)
      ast_verb(0, "Sending arrow\n");
   memcpy(buffsend + SIZE_HEADER, packet_send_arrow, sizeof(packet_send_arrow));
   send_client(SIZE_HEADER + sizeof(packet_send_arrow), buffsend, pte);
   return;
}

static void process_request(int size, unsigned char *buf, struct unistimsession *pte)
{
   char tmpbuf[255];
   if (memcmp
      (buf + SIZE_HEADER, packet_recv_resume_connection_with_server,
       sizeof(packet_recv_resume_connection_with_server)) == 0) {
      rcv_resume_connection_with_server(pte);
      return;
   }
   if (memcmp(buf + SIZE_HEADER, packet_recv_firm_version, sizeof(packet_recv_firm_version)) ==
      0) {
      buf[size] = 0;
      if (unistimdebug)
         ast_verb(0, "Got the firmware version : '%s'\n", buf + 13);
      init_phone_step2(pte);
      return;
   }
   if (memcmp(buf + SIZE_HEADER, packet_recv_mac_addr, sizeof(packet_recv_mac_addr)) == 0) {
      rcv_mac_addr(pte, buf);
      return;
   }
   if (memcmp(buf + SIZE_HEADER, packet_recv_r2, sizeof(packet_recv_r2)) == 0) {
      if (unistimdebug)
         ast_verb(0, "R2 received\n");
      return;
   }

   if (pte->state < STATE_MAINPAGE) {
      if (unistimdebug)
         ast_verb(0, "Request not authorized in this state\n");
      return;
   }
   if (!memcmp(buf + SIZE_HEADER, packet_recv_pressed_key, sizeof(packet_recv_pressed_key))) {
      char keycode = buf[13];

      if (unistimdebug)
         ast_verb(0, "Key pressed : keycode = 0x%.2x - current state : %d\n", keycode,
                  pte->state);

      switch (pte->state) {
      case STATE_INIT:
         if (unistimdebug)
            ast_verb(0, "No keys allowed in the init state\n");
         break;
      case STATE_AUTHDENY:
         if (unistimdebug)
            ast_verb(0, "No keys allowed in authdeny state\n");
         break;
      case STATE_MAINPAGE:
         key_main_page(pte, keycode);
         break;
      case STATE_DIALPAGE:
         key_dial_page(pte, keycode);
         break;
      case STATE_RINGING:
         key_ringing(pte, keycode);
         break;
      case STATE_CALL:
         key_call(pte, keycode);
         break;
      case STATE_EXTENSION:
         key_select_extension(pte, keycode);
         break;
      case STATE_SELECTCODEC:
         key_select_codec(pte, keycode);
         break;
      case STATE_HISTORY:
         key_history(pte, keycode);
         break;
      default:
         ast_log(LOG_WARNING, "Key : Unknown state\n");
      }
      return;
   }
   if (memcmp(buf + SIZE_HEADER, packet_recv_pick_up, sizeof(packet_recv_pick_up)) == 0) {
      if (unistimdebug)
         ast_verb(0, "Handset off hook\n");
      if (!pte->device)        /* We are not yet registered (asking for a TN in AUTOPROVISIONING_TN) */
         return;
      pte->device->receiver_state = STATE_OFFHOOK;
      if (pte->device->output == OUTPUT_HEADPHONE)
         send_select_output(pte, OUTPUT_HEADPHONE, pte->device->volume, MUTE_OFF);
      else
         send_select_output(pte, OUTPUT_HANDSET, pte->device->volume, MUTE_OFF);
      if (pte->state == STATE_RINGING)
         HandleCallIncoming(pte);
      else if ((pte->state == STATE_DIALPAGE) || (pte->state == STATE_CALL))
         send_select_output(pte, OUTPUT_HANDSET, pte->device->volume, MUTE_OFF);
      else if (pte->state == STATE_EXTENSION) /* We must have a TN before calling */
         return;
      else {
         send_select_output(pte, OUTPUT_HANDSET, pte->device->volume, MUTE_OFF);
         handle_dial_page(pte);
      }
      return;
   }
   if (memcmp(buf + SIZE_HEADER, packet_recv_hangup, sizeof(packet_recv_hangup)) == 0) {
      if (unistimdebug)
         ast_verb(0, "Handset on hook\n");
      if (!pte->device)
         return;
      pte->device->receiver_state = STATE_ONHOOK;
      if (pte->state == STATE_CALL)
         close_call(pte);
      else if (pte->device->lines->subs[SUB_REAL]->owner)
         close_call(pte);
      else if (pte->state == STATE_EXTENSION)
         return;
      else
         show_main_page(pte);
      return;
   }
   strcpy(tmpbuf, ast_inet_ntoa(pte->sin.sin_addr));
   strcat(tmpbuf, " Unknown request packet\n");
   if (unistimdebug)
      ast_debug(1, "%s", tmpbuf);
   return;
}

static void parsing(int size, unsigned char *buf, struct unistimsession *pte,
   struct sockaddr_in *addr_from)
{
   unsigned short *sbuf = (unsigned short *) buf;
   unsigned short seq;
   char tmpbuf[255];

   strcpy(tmpbuf, ast_inet_ntoa(addr_from->sin_addr));

   if (size < 10) {
      if (size == 0) {
         ast_log(LOG_WARNING, "%s Read error\n", tmpbuf);
      } else {
         ast_log(LOG_NOTICE, "%s Packet too short - ignoring\n", tmpbuf);
      }
      return;
   }
   if (sbuf[0] == 0xffff) {   /* Starting with 0xffff ? *//* Yes, discovery packet ? */
      if (size != sizeof(packet_rcv_discovery)) {
         ast_log(LOG_NOTICE, "%s Invalid size of a discovery packet\n", tmpbuf);
      } else {
         if (memcmp(buf, packet_rcv_discovery, sizeof(packet_rcv_discovery)) == 0) {
            if (unistimdebug)
               ast_verb(0, "Discovery packet received - Sending Discovery ACK\n");
            if (pte) {        /* A session was already active for this IP ? */
               if (pte->state == STATE_INIT) { /* Yes, but it's a dupe */
                  if (unistimdebug)
                     ast_verb(1, "Duplicated Discovery packet\n");
                  send_raw_client(sizeof(packet_send_discovery_ack),
                             packet_send_discovery_ack, addr_from, &pte->sout);
                  pte->seq_phone = (short) 0x0000; /* reset sequence number */
               } else { /* No, probably a reboot, phone side */
                  close_client(pte);       /* Cleanup the previous session */
                  if (create_client(addr_from))
                     send_raw_client(sizeof(packet_send_discovery_ack),
                                packet_send_discovery_ack, addr_from, &pte->sout);
               }
            } else {
               /* Creating new entry in our phone list */
               if ((pte = create_client(addr_from)))
                  send_raw_client(sizeof(packet_send_discovery_ack),
                             packet_send_discovery_ack, addr_from, &pte->sout);
            }
            return;
         }
         ast_log(LOG_NOTICE, "%s Invalid discovery packet\n", tmpbuf);
      }
      return;
   }
   if (!pte) {
      if (unistimdebug)
         ast_verb(0, "%s Not a discovery packet from an unknown source : ignoring\n",
                  tmpbuf);
      return;
   }

   if (sbuf[0] != 0) {          /* Starting with something else than 0x0000 ? */
      ast_log(LOG_NOTICE, "Unknown packet received - ignoring\n");
      return;
   }
   if (buf[5] != 2) {
      ast_log(LOG_NOTICE, "%s Wrong direction : got 0x%.2x expected 0x02\n", tmpbuf,
            buf[5]);
      return;
   }
   seq = ntohs(sbuf[1]);
   if (buf[4] == 1) {
      ast_mutex_lock(&pte->lock);
      if (unistimdebug)
         ast_verb(6, "ACK received for packet #0x%.4x\n", seq);
      pte->nb_retransmit = 0;

      if ((pte->last_seq_ack) + 1 == seq) {
         pte->last_seq_ack++;
         check_send_queue(pte);
         ast_mutex_unlock(&pte->lock);
         return;
      }
      if (pte->last_seq_ack > seq) {
         if (pte->last_seq_ack == 0xffff) {
            ast_verb(0, "ACK at 0xffff, restarting counter.\n");
            pte->last_seq_ack = 0;
         } else
            ast_log(LOG_NOTICE,
                  "%s Warning : ACK received for an already ACKed packet : #0x%.4x we are at #0x%.4x\n",
                  tmpbuf, seq, pte->last_seq_ack);
         ast_mutex_unlock(&pte->lock);
         return;
      }
      if (pte->seq_server < seq) {
         ast_log(LOG_NOTICE,
               "%s Error : ACK received for a non-existent packet : #0x%.4x\n",
               tmpbuf, pte->seq_server);
         ast_mutex_unlock(&pte->lock);
         return;
      }
      if (unistimdebug)
         ast_verb(0, "%s ACK gap : Received ACK #0x%.4x, previous was #0x%.4x\n",
                  tmpbuf, seq, pte->last_seq_ack);
      pte->last_seq_ack = seq;
      check_send_queue(pte);
      ast_mutex_unlock(&pte->lock);
      return;
   }
   if (buf[4] == 2) {
      if (unistimdebug)
         ast_verb(0, "Request received\n");
      if (pte->seq_phone == seq) {
         /* Send ACK */
         buf[4] = 1;
         buf[5] = 1;
         send_raw_client(SIZE_HEADER, buf, addr_from, &pte->sout);
         pte->seq_phone++;

         process_request(size, buf, pte);
         return;
      }
      if (pte->seq_phone > seq) {
         ast_log(LOG_NOTICE,
               "%s Warning : received a retransmitted packet : #0x%.4x (we are at #0x%.4x)\n",
               tmpbuf, seq, pte->seq_phone);
         /* BUG ? pte->device->seq_phone = seq; */
         /* Send ACK */
         buf[4] = 1;
         buf[5] = 1;
         send_raw_client(SIZE_HEADER, buf, addr_from, &pte->sout);
         return;
      }
      ast_log(LOG_NOTICE,
            "%s Warning : we lost a packet : received #0x%.4x (we are at #0x%.4x)\n",
            tmpbuf, seq, pte->seq_phone);
      return;
   }
   if (buf[4] == 0) {
      ast_log(LOG_NOTICE, "%s Retransmit request for packet #0x%.4x\n", tmpbuf, seq);
      if (pte->last_seq_ack > seq) {
         ast_log(LOG_NOTICE,
               "%s Error : received a request for an already ACKed packet : #0x%.4x\n",
               tmpbuf, pte->last_seq_ack);
         return;
      }
      if (pte->seq_server < seq) {
         ast_log(LOG_NOTICE,
               "%s Error : received a request for a non-existent packet : #0x%.4x\n",
               tmpbuf, pte->seq_server);
         return;
      }
      send_retransmit(pte);
      return;
   }
   ast_log(LOG_NOTICE, "%s Unknown request : got 0x%.2x expected 0x00,0x01 or 0x02\n",
         tmpbuf, buf[4]);
   return;
}

static struct unistimsession *channel_to_session(struct ast_channel *ast)
{
   struct unistim_subchannel *sub;
   if (!ast) {
      ast_log(LOG_WARNING, "Unistim callback function called with a null channel\n");
      return NULL;
   }
   if (!ast->tech_pvt) {
      ast_log(LOG_WARNING, "Unistim callback function called without a tech_pvt\n");
      return NULL;
   }
   sub = ast->tech_pvt;

   if (!sub->parent) {
      ast_log(LOG_WARNING, "Unistim callback function called without a line\n");
      return NULL;
   }
   if (!sub->parent->parent) {
      ast_log(LOG_WARNING, "Unistim callback function called without a device\n");
      return NULL;
   }
   if (!sub->parent->parent->session) {
      ast_log(LOG_WARNING, "Unistim callback function called without a session\n");
      return NULL;
   }
   return sub->parent->parent->session;
}

/*--- unistim_call: Initiate UNISTIM call from PBX ---*/
/*      used from the dial() application      */
static int unistim_call(struct ast_channel *ast, char *dest, int timeout)
{
   int res = 0;
   struct unistim_subchannel *sub;
   struct unistimsession *session;

   session = channel_to_session(ast);
   if (!session) {
      ast_log(LOG_ERROR, "Device not registered, cannot call %s\n", dest);
      return -1;
   }

   sub = ast->tech_pvt;
   if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
      ast_log(LOG_WARNING, "unistim_call called on %s, neither down nor reserved\n",
            ast->name);
      return -1;
   }

   if (unistimdebug)
      ast_verb(3, "unistim_call(%s)\n", ast->name);

   session->state = STATE_RINGING;
   Sendicon(TEXT_LINE0, FAV_ICON_NONE, session);

   if (sub->owner) {
      if (sub->owner->cid.cid_num) {
         send_text(TEXT_LINE1, TEXT_NORMAL, session, sub->owner->cid.cid_num);
         change_callerid(session, 0, sub->owner->cid.cid_num);
      } else {
         send_text(TEXT_LINE1, TEXT_NORMAL, session, DEFAULTCALLERID);
         change_callerid(session, 0, DEFAULTCALLERID);
      }
      if (sub->owner->cid.cid_name) {
         send_text(TEXT_LINE0, TEXT_NORMAL, session, sub->owner->cid.cid_name);
         change_callerid(session, 1, sub->owner->cid.cid_name);
      } else {
         send_text(TEXT_LINE0, TEXT_NORMAL, session, DEFAULTCALLERNAME);
         change_callerid(session, 1, DEFAULTCALLERNAME);
      }
   }
   send_text(TEXT_LINE2, TEXT_NORMAL, session, "is calling you.");
   send_text_status(session, "Accept          Ignore");

   if (sub->ringstyle == -1)
      send_ring(session, session->device->ringvolume, session->device->ringstyle);
   else {
      if (sub->ringvolume == -1)
         send_ring(session, session->device->ringvolume, sub->ringstyle);
      else
         send_ring(session, sub->ringvolume, sub->ringstyle);
   }
   change_favorite_icon(session, FAV_ICON_SPEAKER_ONHOOK_BLACK + FAV_BLINK_FAST);

   ast_setstate(ast, AST_STATE_RINGING);
   ast_queue_control(ast, AST_CONTROL_RINGING);
   return res;
}

/*--- unistim_hangup: Hangup UNISTIM call */
static int unistim_hangup(struct ast_channel *ast)
{
   struct unistim_subchannel *sub;
   struct unistim_line *l;
   struct unistimsession *s;

   s = channel_to_session(ast);
   sub = ast->tech_pvt;
   if (!s) {
      ast_debug(1, "Asked to hangup channel not connected\n");
      ast_mutex_lock(&sub->lock);
      sub->owner = NULL;
      ast->tech_pvt = NULL;
      sub->alreadygone = 0;
      ast_mutex_unlock(&sub->lock);
      if (sub->rtp) {
         if (unistimdebug)
            ast_verb(0, "Destroying RTP session\n");
         ast_rtp_destroy(sub->rtp);
         sub->rtp = NULL;
      }
      return 0;
   }
   l = sub->parent;
   if (unistimdebug)
      ast_verb(0, "unistim_hangup(%s) on %s@%s\n", ast->name, l->name, l->parent->name);

   if ((l->subs[SUB_THREEWAY]) && (sub->subtype == SUB_REAL)) {
      if (unistimdebug)
         ast_verb(0, "Real call disconnected while talking to threeway\n");
      sub->owner = NULL;
      ast->tech_pvt = NULL;
      return 0;
   }
   if ((l->subs[SUB_REAL]->owner) && (sub->subtype == SUB_THREEWAY) &&
      (sub->alreadygone == 0)) {
      if (unistimdebug)
         ast_verb(0, "threeway call disconnected, switching to real call\n");
      send_text(TEXT_LINE0, TEXT_NORMAL, s, "Three way call canceled,");
      send_text(TEXT_LINE1, TEXT_NORMAL, s, "switching back to");
      send_text(TEXT_LINE2, TEXT_NORMAL, s, "previous call.");
      send_text_status(s, "Hangup Transf");
      ast_moh_stop(ast_bridged_channel(l->subs[SUB_REAL]->owner));
      swap_subs(l, SUB_THREEWAY, SUB_REAL);
      l->parent->moh = 0;
      ast_mutex_lock(&sub->lock);
      sub->owner = NULL;
      ast->tech_pvt = NULL;
      ast_mutex_unlock(&sub->lock);
      unalloc_sub(l, SUB_THREEWAY);
      return 0;
   }
   ast_mutex_lock(&sub->lock);
   sub->owner = NULL;
   ast->tech_pvt = NULL;
   sub->alreadygone = 0;
   ast_mutex_unlock(&sub->lock);
   if (!s) {
      if (unistimdebug)
         ast_verb(0, "Asked to hangup channel not connected (no session)\n");
      if (sub->rtp) {
         if (unistimdebug)
            ast_verb(0, "Destroying RTP session\n");
         ast_rtp_destroy(sub->rtp);
         sub->rtp = NULL;
      }
      return 0;
   }
   if (sub->subtype == SUB_REAL) {
      /* Stop the silence generator */
      if (s->device->silence_generator) {
         if (unistimdebug)
            ast_verb(0, "Stopping silence generator\n");
         if (sub->owner)
            ast_channel_stop_silence_generator(sub->owner,
                                       s->device->silence_generator);
         else
            ast_log(LOG_WARNING,
                  "Trying to stop silence generator on a null channel !\n");
         s->device->silence_generator = NULL;
      }
   }
   l->parent->moh = 0;
   send_no_ring(s);
   send_end_call(s);
   if (sub->rtp) {
      if (unistimdebug)
         ast_verb(0, "Destroying RTP session\n");
      ast_rtp_destroy(sub->rtp);
      sub->rtp = NULL;
   } else if (unistimdebug)
      ast_verb(0, "No RTP session to destroy\n");
   if (l->subs[SUB_THREEWAY]) {
      if (unistimdebug)
         ast_verb(0, "Cleaning other subchannels\n");
      unalloc_sub(l, SUB_THREEWAY);
   }
   if (s->state == STATE_RINGING)
      cancel_dial(s);
   else if (s->state == STATE_CALL)
      close_call(s);

   return 0;
}

/*--- unistim_answer: Answer UNISTIM call */
static int unistim_answer(struct ast_channel *ast)
{
   int res = 0;
   struct unistim_subchannel *sub;
   struct unistim_line *l;
   struct unistimsession *s;

   s = channel_to_session(ast);
   if (!s) {
      ast_log(LOG_WARNING, "unistim_answer on a disconnected device ?\n");
      return -1;
   }
   sub = ast->tech_pvt;
   l = sub->parent;

   if ((!sub->rtp) && (!l->subs[SUB_THREEWAY]))
      start_rtp(sub);
   if (unistimdebug)
      ast_verb(0, "unistim_answer(%s) on %s@%s-%d\n", ast->name, l->name,
               l->parent->name, sub->subtype);
   send_text(TEXT_LINE2, TEXT_NORMAL, l->parent->session, "is now on-line");
   if (l->subs[SUB_THREEWAY])
      send_text_status(l->parent->session, "Transf Cancel");
   else
      send_text_status(l->parent->session, "Hangup Transf");
   send_start_timer(l->parent->session);
   if (ast->_state != AST_STATE_UP)
      ast_setstate(ast, AST_STATE_UP);
   return res;
}

/*--- unistimsock_read: Read data from UNISTIM socket ---*/
/*    Successful messages is connected to UNISTIM call and forwarded to parsing() */
static int unistimsock_read(int *id, int fd, short events, void *ignore)
{
   struct sockaddr_in addr_from = { 0, };
   struct unistimsession *cur = NULL;
   int found = 0;
   int tmp = 0;
   int dw_num_bytes_rcvd;
#ifdef DUMP_PACKET
   int dw_num_bytes_rcvdd;
   char iabuf[INET_ADDRSTRLEN];
#endif

   dw_num_bytes_rcvd =
      recvfrom(unistimsock, buff, SIZE_PAGE, 0, (struct sockaddr *) &addr_from,
             &size_addr_from);
   if (dw_num_bytes_rcvd == -1) {
      if (errno == EAGAIN)
         ast_log(LOG_NOTICE, "UNISTIM: Received packet with bad UDP checksum\n");
      else if (errno != ECONNREFUSED)
         ast_log(LOG_WARNING, "Recv error %d (%s)\n", errno, strerror(errno));
      return 1;
   }

   /* Looking in the phone list if we already have a registration for him */
   ast_mutex_lock(&sessionlock);
   cur = sessions;
   while (cur) {
      if (cur->sin.sin_addr.s_addr == addr_from.sin_addr.s_addr) {
         found = 1;
         break;
      }
      tmp++;
      cur = cur->next;
   }
   ast_mutex_unlock(&sessionlock);

#ifdef DUMP_PACKET
   if (unistimdebug)
      ast_verb(0, "\n*** Dump %d bytes from %s - phone_table[%d] ***\n",
               dw_num_bytes_rcvd, ast_inet_ntoa(addr_from.sin_addr), tmp);
   for (dw_num_bytes_rcvdd = 0; dw_num_bytes_rcvdd < dw_num_bytes_rcvd;
       dw_num_bytes_rcvdd++)
      ast_verb(0, "%.2x ", (unsigned char) buff[dw_num_bytes_rcvdd]);
   ast_verb(0, "\n******************************************\n");
#endif

   if (!found) {
      if (unistimdebug)
         ast_verb(0, "Received a packet from an unknown source\n");
      parsing(dw_num_bytes_rcvd, buff, NULL, (struct sockaddr_in *) &addr_from);

   } else
      parsing(dw_num_bytes_rcvd, buff, cur, (struct sockaddr_in *) &addr_from);

   return 1;
}

static struct ast_frame *unistim_rtp_read(const struct ast_channel *ast,
   const struct unistim_subchannel *sub)
{
   /* Retrieve audio/etc from channel.  Assumes sub->lock is already held. */
   struct ast_frame *f;

   if (!ast) {
      ast_log(LOG_WARNING, "Channel NULL while reading\n");
      return &ast_null_frame;
   }

   if (!sub->rtp) {
      ast_log(LOG_WARNING, "RTP handle NULL while reading on subchannel %d\n",
            sub->subtype);
      return &ast_null_frame;
   }

   switch (ast->fdno) {
   case 0:
      f = ast_rtp_read(sub->rtp);     /* RTP Audio */
      break;
   case 1:
      f = ast_rtcp_read(sub->rtp);    /* RTCP Control Channel */
      break;
   default:
      f = &ast_null_frame;
   }

   if (sub->owner) {
      /* We already hold the channel lock */
      if (f->frametype == AST_FRAME_VOICE) {
         if (f->subclass != sub->owner->nativeformats) {
            ast_debug(1,
                  "Oooh, format changed from %s (%d) to %s (%d)\n",
                  ast_getformatname(sub->owner->nativeformats),
                  sub->owner->nativeformats, ast_getformatname(f->subclass),
                  f->subclass);

            sub->owner->nativeformats = f->subclass;
            ast_set_read_format(sub->owner, sub->owner->readformat);
            ast_set_write_format(sub->owner, sub->owner->writeformat);
         }
      }
   }

   return f;
}

static struct ast_frame *unistim_read(struct ast_channel *ast)
{
   struct ast_frame *fr;
   struct unistim_subchannel *sub = ast->tech_pvt;

   ast_mutex_lock(&sub->lock);
   fr = unistim_rtp_read(ast, sub);
   ast_mutex_unlock(&sub->lock);

   return fr;
}

static int unistim_write(struct ast_channel *ast, struct ast_frame *frame)
{
   struct unistim_subchannel *sub = ast->tech_pvt;
   int res = 0;

   if (frame->frametype != AST_FRAME_VOICE) {
      if (frame->frametype == AST_FRAME_IMAGE)
         return 0;
      else {
         ast_log(LOG_WARNING, "Can't send %d type frames with unistim_write\n",
               frame->frametype);
         return 0;
      }
   } else {
      if (!(frame->subclass & ast->nativeformats)) {
         ast_log(LOG_WARNING,
               "Asked to transmit frame type %s (%d), while native formats is %s (%d) (read/write = %s (%d)/%d)\n",
               ast_getformatname(frame->subclass), frame->subclass,
               ast_getformatname(ast->nativeformats), ast->nativeformats,
               ast_getformatname(ast->readformat), ast->readformat,
               ast->writeformat);
         return -1;
      }
   }

   if (sub) {
      ast_mutex_lock(&sub->lock);
      if (sub->rtp) {
         res = ast_rtp_write(sub->rtp, frame);
      }
      ast_mutex_unlock(&sub->lock);
   }

   return res;
}

static int unistim_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
{
   struct unistim_subchannel *p = newchan->tech_pvt;
   struct unistim_line *l = p->parent;

   ast_mutex_lock(&p->lock);

   ast_debug(1, "New owner for channel USTM/%s@%s-%d is %s\n", l->name,
         l->parent->name, p->subtype, newchan->name);

   if (p->owner != oldchan) {
      ast_log(LOG_WARNING, "old channel wasn't %s (%p) but was %s (%p)\n",
            oldchan->name, oldchan, p->owner->name, p->owner);
      return -1;
   }

   p->owner = newchan;

   ast_mutex_unlock(&p->lock);

   return 0;

}

static char *control2str(int ind)
{
   switch (ind) {
   case AST_CONTROL_HANGUP:
      return "Other end has hungup";
   case AST_CONTROL_RING:
      return "Local ring";
   case AST_CONTROL_RINGING:
      return "Remote end is ringing";
   case AST_CONTROL_ANSWER:
      return "Remote end has answered";
   case AST_CONTROL_BUSY:
      return "Remote end is busy";
   case AST_CONTROL_TAKEOFFHOOK:
      return "Make it go off hook";
   case AST_CONTROL_OFFHOOK:
      return "Line is off hook";
   case AST_CONTROL_CONGESTION:
      return "Congestion (circuits busy)";
   case AST_CONTROL_FLASH:
      return "Flash hook";
   case AST_CONTROL_WINK:
      return "Wink";
   case AST_CONTROL_OPTION:
      return "Set a low-level option";
   case AST_CONTROL_RADIO_KEY:
      return "Key Radio";
   case AST_CONTROL_RADIO_UNKEY:
      return "Un-Key Radio";
   case -1:
      return "Stop tone";
   }
   return "UNKNOWN";
}

static void in_band_indication(struct ast_channel *ast, const struct tone_zone *tz,
   const char *indication)
{
   const struct tone_zone_sound *ts = NULL;

   ts = ast_get_indication_tone(tz, indication);

   if (ts && ts->data[0])
      ast_playtones_start(ast, 0, ts->data, 1);
   else
      ast_log(LOG_WARNING, "Unable to get indication tone for %s\n", indication);
}

static int unistim_indicate(struct ast_channel *ast, int ind, const void *data, 
   size_t datalen)
{
   struct unistim_subchannel *sub;
   struct unistim_line *l;
   struct unistimsession *s;

   if (unistimdebug) {
      ast_verb(3, "Asked to indicate '%s' condition on channel %s\n",
               control2str(ind), ast->name);
   }

   s = channel_to_session(ast);
   if (!s)
      return -1;

   sub = ast->tech_pvt;
   l = sub->parent;

   switch (ind) {
   case AST_CONTROL_RINGING:
      if (ast->_state != AST_STATE_UP) {
         send_text(TEXT_LINE2, TEXT_NORMAL, s, "Ringing...");
         in_band_indication(ast, l->parent->tz, "ring");
         s->device->missed_call = -1;
         break;
      }
      return -1;
   case AST_CONTROL_BUSY:
      if (ast->_state != AST_STATE_UP) {
         sub->alreadygone = 1;
         send_text(TEXT_LINE2, TEXT_NORMAL, s, "Busy");
         in_band_indication(ast, l->parent->tz, "busy");
         s->device->missed_call = -1;
         break;
      }
      return -1;
   case AST_CONTROL_CONGESTION:
      if (ast->_state != AST_STATE_UP) {
         sub->alreadygone = 1;
         send_text(TEXT_LINE2, TEXT_NORMAL, s, "Congestion");
         in_band_indication(ast, l->parent->tz, "congestion");
         s->device->missed_call = -1;
         break;
      }
      return -1;
   case AST_CONTROL_HOLD:
      ast_moh_start(ast, data, NULL);
      break;
   case AST_CONTROL_UNHOLD:
      ast_moh_stop(ast);
      break;
   case AST_CONTROL_PROGRESS:
   case AST_CONTROL_SRCUPDATE:
      break;
   case -1:
      ast_playtones_stop(ast);
      s->device->missed_call = 0;
      break;
   case AST_CONTROL_PROCEEDING:
      break;
   default:
      ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", ind);
      return -1;
   }

   return 0;
}

static struct unistim_subchannel *find_subchannel_by_name(const char *dest)
{
   struct unistim_line *l;
   struct unistim_device *d;
   char line[256];
   char *at;
   char *device;

   ast_copy_string(line, dest, sizeof(line));
   at = strchr(line, '@');
   if (!at) {
      ast_log(LOG_NOTICE, "Device '%s' has no @ (at) sign!\n", dest);
      return NULL;
   }
   *at = '\0';
   at++;
   device = at;
   ast_mutex_lock(&devicelock);
   d = devices;
   at = strchr(device, '/');       /* Extra options ? */
   if (at)
      *at = '\0';
   while (d) {
      if (!strcasecmp(d->name, device)) {
         if (unistimdebug)
            ast_verb(0, "Found device: %s\n", d->name);
         /* Found the device */
         l = d->lines;
         while (l) {
            /* Search for the right line */
            if (!strcasecmp(l->name, line)) {
               l->subs[SUB_REAL]->ringvolume = -1;
               l->subs[SUB_REAL]->ringstyle = -1;
               if (at) {       /* Other options ? */
                  at++;   /* Skip slash */
                  if (*at == 'r') {       /* distinctive ring */
                     at++;
                     if ((*at < '0') || (*at > '7')) /* ring style */
                        ast_log(LOG_WARNING, "Invalid ring selection (%s)", at);
                     else {
                        char ring_volume = -1;
                        char ring_style = *at - '0';
                        at++;
                        if ((*at >= '0') && (*at <= '3'))       /* ring volume */
                           ring_volume = *at - '0';
                        if (unistimdebug)
                           ast_verb(0, "Distinctive ring : style #%d volume %d\n",
                               ring_style, ring_volume);
                        l->subs[SUB_REAL]->ringvolume = ring_volume;
                        l->subs[SUB_REAL]->ringstyle = ring_style;
                     }
                  }
               }
               ast_mutex_unlock(&devicelock);
               return l->subs[SUB_REAL];
            }
            l = l->next;
         }
      }
      d = d->next;
   }
   /* Device not found */
   ast_mutex_unlock(&devicelock);

   return NULL;
}

static int unistim_senddigit_begin(struct ast_channel *ast, char digit)
{
   struct unistimsession *pte = channel_to_session(ast);

   if (!pte)
      return -1;

   return unistim_do_senddigit(pte, digit);
}

static int unistim_senddigit_end(struct ast_channel *ast, char digit, unsigned int duration)
{
   struct unistimsession *pte = channel_to_session(ast);
   struct ast_frame f = { 0, };
   struct unistim_subchannel *sub;

   sub = pte->device->lines->subs[SUB_REAL];

   if (!sub->owner || sub->alreadygone) {
      ast_log(LOG_WARNING, "Unable to find subchannel in dtmf senddigit_end\n");
      return -1;
   }

   if (unistimdebug)
      ast_verb(0, "Send Digit off %c\n", digit);

   if (!pte)
      return -1;

   send_tone(pte, 0, 0);
   f.frametype = AST_FRAME_DTMF;
   f.subclass = digit;
   f.src = "unistim";
   ast_queue_frame(sub->owner, &f);

   return 0;
}

/*--- unistim_sendtext: Display a text on the phone screen ---*/
/*      Called from PBX core text message functions */
static int unistim_sendtext(struct ast_channel *ast, const char *text)
{
   struct unistimsession *pte = channel_to_session(ast);
   int size;
   char tmp[TEXT_LENGTH_MAX + 1];

   if (unistimdebug)
      ast_verb(0, "unistim_sendtext called\n");

   if (!text) {
      ast_log(LOG_WARNING, "unistim_sendtext called with a null text\n");
      return 1;
   }

   size = strlen(text);
   if (text[0] == '@') {
      int pos = 0, i = 1, tok = 0, sz = 0;
      char label[11];
      char number[16];
      char icon = '\0';
      char cur = '\0';

      memset(label, 0, 11);
      memset(number, 0, 16);
      while (text[i]) {
         cur = text[i++];
         switch (tok) {
         case 0:
            if ((cur < '0') && (cur > '5')) {
               ast_log(LOG_WARNING,
                     "sendtext failed : position must be a number beetween 0 and 5\n");
               return 1;
            }
            pos = cur - '0';
            tok = 1;
            continue;
         case 1:
            if (cur != '@') {
               ast_log(LOG_WARNING, "sendtext failed : invalid position\n");
               return 1;
            }
            tok = 2;
            continue;
         case 2:
            if ((cur < '3') && (cur > '6')) {
               ast_log(LOG_WARNING,
                     "sendtext failed : icon must be a number beetween 32 and 63 (first digit invalid)\n");
               return 1;
            }
            icon = (cur - '0') * 10;
            tok = 3;
            continue;
         case 3:
            if ((cur < '0') && (cur > '9')) {
               ast_log(LOG_WARNING,
                     "sendtext failed : icon must be a number beetween 32 and 63 (second digit invalid)\n");
               return 1;
            }
            icon += (cur - '0');
            tok = 4;
            continue;
         case 4:
            if (cur != '@') {
               ast_log(LOG_WARNING,
                     "sendtext failed : icon must be a number beetween 32 and 63 (too many digits)\n");
               return 1;
            }
            tok = 5;
            continue;
         case 5:
            if (cur == '@') {
               tok = 6;
               sz = 0;
               continue;
            }
            if (sz > 10)
               continue;
            label[sz] = cur;
            sz++;
            continue;
         case 6:
            if (sz > 15) {
               ast_log(LOG_WARNING,
                     "sendtext failed : extension too long = %d (15 car max)\n",
                     sz);
               return 1;
            }
            number[sz] = cur;
            sz++;
            continue;
         }
      }
      if (tok != 6) {
         ast_log(LOG_WARNING, "sendtext failed : incomplet command\n");
         return 1;
      }
      if (!pte->device) {
         ast_log(LOG_WARNING, "sendtext failed : no device ?\n");
         return 1;
      }
      strcpy(pte->device->softkeylabel[pos], label);
      strcpy(pte->device->softkeynumber[pos], number);
      pte->device->softkeyicon[pos] = icon;
      send_favorite(pos, icon, pte, label);
      return 0;
   }

   if (size <= TEXT_LENGTH_MAX * 2) {
      send_text(TEXT_LINE0, TEXT_NORMAL, pte, "Message :");
      send_text(TEXT_LINE1, TEXT_NORMAL, pte, text);
      if (size <= TEXT_LENGTH_MAX) {
         send_text(TEXT_LINE2, TEXT_NORMAL, pte, "");
         return 0;
      }
      memcpy(tmp, text + TEXT_LENGTH_MAX, TEXT_LENGTH_MAX);
      tmp[sizeof(tmp) - 1] = '\0';
      send_text(TEXT_LINE2, TEXT_NORMAL, pte, tmp);
      return 0;
   }
   send_text(TEXT_LINE0, TEXT_NORMAL, pte, text);
   memcpy(tmp, text + TEXT_LENGTH_MAX, TEXT_LENGTH_MAX);
   tmp[sizeof(tmp) - 1] = '\0';
   send_text(TEXT_LINE1, TEXT_NORMAL, pte, tmp);
   memcpy(tmp, text + TEXT_LENGTH_MAX * 2, TEXT_LENGTH_MAX);
   tmp[sizeof(tmp) - 1] = '\0';
   send_text(TEXT_LINE2, TEXT_NORMAL, pte, tmp);
   return 0;
}

/*--- unistim_send_mwi_to_peer: Send message waiting indication ---*/
static int unistim_send_mwi_to_peer(struct unistimsession *s, unsigned int tick)
{
   struct ast_event *event;
   int new;
   char *mailbox, *context;
   struct unistim_line *peer = s->device->lines;

   context = mailbox = ast_strdupa(peer->mailbox);
   strsep(&context, "@");
   if (ast_strlen_zero(context))
      context = "default";

   event = ast_event_get_cached(AST_EVENT_MWI,
      AST_EVENT_IE_MAILBOX, AST_EVENT_IE_PLTYPE_STR, mailbox,
      AST_EVENT_IE_CONTEXT, AST_EVENT_IE_PLTYPE_STR, context,
      AST_EVENT_IE_END);

   if (event) {
      new = ast_event_get_ie_uint(event, AST_EVENT_IE_NEWMSGS);
      ast_event_destroy(event);
   } else { /* Fall back on checking the mailbox directly */
      new = ast_app_has_voicemail(peer->mailbox, "INBOX");
   }

   peer->nextmsgcheck = tick + TIMER_MWI;

   /* Return now if it's the same thing we told them last time */
   if (new == peer->lastmsgssent) {
      return 0;
   }

   peer->lastmsgssent = new;
   if (new == 0) {
      send_led_update(s, 0);
   } else {
      send_led_update(s, 1);
   }

   return 0;
}

/*--- unistim_new: Initiate a call in the UNISTIM channel */
/*      called from unistim_request (calls from the pbx ) */
static struct ast_channel *unistim_new(struct unistim_subchannel *sub, int state)
{
   struct ast_channel *tmp;
   struct unistim_line *l;
   int fmt;

   if (!sub) {
      ast_log(LOG_WARNING, "subchannel null in unistim_new\n");
      return NULL;
   }
   if (!sub->parent) {
      ast_log(LOG_WARNING, "no line for subchannel %p\n", sub);
      return NULL;
   }
   l = sub->parent;
   tmp = ast_channel_alloc(1, state, l->cid_num, NULL, l->accountcode, l->exten, 
      l->context, l->amaflags, "%s-%08x", l->fullname, (int) (long) sub);
   if (unistimdebug)
      ast_verb(0, "unistim_new sub=%d (%p) chan=%p\n", sub->subtype, sub, tmp);
   if (!tmp) {
      ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
      return NULL;
   }

   tmp->nativeformats = l->capability;
   if (!tmp->nativeformats)
      tmp->nativeformats = CAPABILITY;
   fmt = ast_best_codec(tmp->nativeformats);
   if (unistimdebug)
      ast_verb(0, "Best codec = %d from nativeformats %d (line cap=%d global=%d)\n", fmt,
          tmp->nativeformats, l->capability, CAPABILITY);
   ast_string_field_build(tmp, name, "USTM/%s@%s-%d", l->name, l->parent->name,
                     sub->subtype);
   if ((sub->rtp) && (sub->subtype == 0)) {
      if (unistimdebug)
         ast_verb(0, "New unistim channel with a previous rtp handle ?\n");
      tmp->fds[0] = ast_rtp_fd(sub->rtp);
      tmp->fds[1] = ast_rtcp_fd(sub->rtp);
   }
   if (sub->rtp)
      ast_jb_configure(tmp, &global_jbconf);
      
/*      tmp->type = type; */
   ast_setstate(tmp, state);
   if (state == AST_STATE_RING)
      tmp->rings = 1;
   tmp->adsicpe = AST_ADSI_UNAVAILABLE;
   tmp->writeformat = fmt;
   tmp->rawwriteformat = fmt;
   tmp->readformat = fmt;
   tmp->rawreadformat = fmt;
   tmp->tech_pvt = sub;
   tmp->tech = &unistim_tech;
   if (!ast_strlen_zero(l->language))
      ast_string_field_set(tmp, language, l->language);
   sub->owner = tmp;
   ast_mutex_lock(&usecnt_lock);
   usecnt++;
   ast_mutex_unlock(&usecnt_lock);
   ast_update_use_count();
   tmp->callgroup = l->callgroup;
   tmp->pickupgroup = l->pickupgroup;
   ast_string_field_set(tmp, call_forward, l->parent->call_forward);
   if (!ast_strlen_zero(l->cid_num)) {
      char *name, *loc, *instr;
      instr = ast_strdup(l->cid_num);
      if (instr) {
         ast_callerid_parse(instr, &name, &loc);
         tmp->cid.cid_num = ast_strdup(loc);
         tmp->cid.cid_name = ast_strdup(name);
         ast_free(instr);
      }
   }
   tmp->priority = 1;
   if (state != AST_STATE_DOWN) {
      if (unistimdebug)
         ast_verb(0, "Starting pbx in unistim_new\n");
      if (ast_pbx_start(tmp)) {
         ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
         ast_hangup(tmp);
         tmp = NULL;
      }
   }

   return tmp;
}

static void *do_monitor(void *data)
{
   struct unistimsession *cur = NULL;
   unsigned int dw_timeout = 0;
   unsigned int tick;
   int res;
   int reloading;

   /* Add an I/O event to our UDP socket */
   if (unistimsock > -1)
      ast_io_add(io, unistimsock, unistimsock_read, AST_IO_IN, NULL);

   /* This thread monitors our UDP socket and timers */
   for (;;) {
      /* This loop is executed at least every IDLE_WAITus (1s) or every time a packet is received */
      /* Looking for the smallest time-out value */
      tick = get_tick_count();
      dw_timeout = UINT_MAX;
      ast_mutex_lock(&sessionlock);
      cur = sessions;
      DEBUG_TIMER("checking timeout for session %p with tick = %u\n", cur, tick);
      while (cur) {
         DEBUG_TIMER("checking timeout for session %p timeout = %u\n", cur,
                  cur->timeout);
         /* Check if we have miss something */
         if (cur->timeout <= tick) {
            DEBUG_TIMER("Event for session %p\n", cur);
            /* If the queue is empty, send a ping */
            if (cur->last_buf_available == 0)
               send_ping(cur);
            else {
               if (send_retransmit(cur)) {
                  DEBUG_TIMER("The chained link was modified, restarting...\n");
                  cur = sessions;
                  dw_timeout = UINT_MAX;
                  continue;
               }
            }
         }
         if (dw_timeout > cur->timeout - tick)
            dw_timeout = cur->timeout - tick;
         /* Checking if the phone is logged on for a new MWI */
         if (cur->device) {
            if ((!ast_strlen_zero(cur->device->lines->mailbox)) &&
               ((tick >= cur->device->lines->nextmsgcheck))) {
               DEBUG_TIMER("Checking mailbox for MWI\n");
               unistim_send_mwi_to_peer(cur, tick);
               break;
            }
         }
         cur = cur->next;
      }
      ast_mutex_unlock(&sessionlock);
      DEBUG_TIMER("Waiting for %dus\n", dw_timeout);
      res = dw_timeout;
      /* We should not wait more than IDLE_WAIT */
      if ((res < 0) || (res > IDLE_WAIT))
         res = IDLE_WAIT;
      /* Wait for UDP messages for a maximum of res us */
      res = ast_io_wait(io, res);     /* This function will call unistimsock_read if a packet is received */
      /* Check for a reload request */
      ast_mutex_lock(&unistim_reload_lock);
      reloading = unistim_reloading;
      unistim_reloading = 0;
      ast_mutex_unlock(&unistim_reload_lock);
      if (reloading) {
         ast_verb(1, "Reloading unistim.conf...\n");
         reload_config();
      }
      pthread_testcancel();
   }
   /* Never reached */
   return NULL;
}

/*--- restart_monitor: Start the channel monitor thread ---*/
static int restart_monitor(void)
{
   pthread_attr_t attr;
   /* If we're supposed to be stopped -- stay stopped */
   if (monitor_thread == AST_PTHREADT_STOP)
      return 0;
   if (ast_mutex_lock(&monlock)) {
      ast_log(LOG_WARNING, "Unable to lock monitor\n");
      return -1;
   }
   if (monitor_thread == pthread_self()) {
      ast_mutex_unlock(&monlock);
      ast_log(LOG_WARNING, "Cannot kill myself\n");
      return -1;
   }
   if (monitor_thread != AST_PTHREADT_NULL) {
      /* Wake up the thread */
      pthread_kill(monitor_thread, SIGURG);
   } else {
      pthread_attr_init(&attr);
      pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
      /* Start a new monitor */
      if (ast_pthread_create(&monitor_thread, &attr, do_monitor, NULL) < 0) {
         ast_mutex_unlock(&monlock);
         ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
         return -1;
      }
   }
   ast_mutex_unlock(&monlock);
   return 0;
}

/*--- unistim_request: PBX interface function ---*/
/* UNISTIM calls initiated by the PBX arrive here */
static struct ast_channel *unistim_request(const char *type, int format, void *data,
                                 int *cause)
{
   int oldformat;
   struct unistim_subchannel *sub;
   struct ast_channel *tmpc = NULL;
   char tmp[256];
   char *dest = data;

   oldformat = format;
   format &= CAPABILITY;
   ast_log(LOG_NOTICE,
         "Asked to get a channel of format %s while capability is %d result : %s (%d) \n",
         ast_getformatname(oldformat), CAPABILITY, ast_getformatname(format), format);
   if (!format) {
      ast_log(LOG_NOTICE,
            "Asked to get a channel of unsupported format %s while capability is %s\n",
            ast_getformatname(oldformat), ast_getformatname(CAPABILITY));
      return NULL;
   }

   ast_copy_string(tmp, dest, sizeof(tmp));
   if (ast_strlen_zero(tmp)) {
      ast_log(LOG_NOTICE, "Unistim channels require a device\n");
      return NULL;
   }

   sub = find_subchannel_by_name(tmp);
   if (!sub) {
      ast_log(LOG_NOTICE, "No available lines on: %s\n", dest);
      *cause = AST_CAUSE_CONGESTION;
      return NULL;
   }

   ast_verb(3, "unistim_request(%s)\n", tmp);
   /* Busy ? */
   if (sub->owner) {
      if (unistimdebug)
         ast_verb(0, "Can't create channel : Busy !\n");
      *cause = AST_CAUSE_BUSY;
      return NULL;
   }
   sub->parent->capability = format;
   tmpc = unistim_new(sub, AST_STATE_DOWN);
   if (!tmpc)
      ast_log(LOG_WARNING, "Unable to make channel for '%s'\n", tmp);
   if (unistimdebug)
      ast_verb(0, "unistim_request owner = %p\n", sub->owner);
   restart_monitor();

   /* and finish */
   return tmpc;
}

static char *unistim_info(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
   struct unistim_device *device = devices;
   struct unistim_line *line;
   struct unistim_subchannel *sub;
   struct unistimsession *s;
   int i;
   struct ast_channel *tmp;

   switch (cmd) {
   case CLI_INIT:
      e->command = "unistim info";
      e->usage =
         "Usage: unistim info\n" 
         "       Dump internal structures.\n";
      return NULL;

   case CLI_GENERATE:
      return NULL;   /* no completion */
   }

   if (a->argc != e->args)
      return CLI_SHOWUSAGE;

   ast_cli(a->fd, "Dumping internal structures :\ndevice\n->line\n-->sub\n");
   while (device) {
      ast_cli(a->fd, "\nname=%s id=%s line=%p ha=%p sess=%p device=%p\n",
            device->name, device->id, device->lines, device->ha, device->session,
            device);
      line = device->lines;
      while (line) {
         ast_cli(a->fd,
               "->name=%s fullname=%s exten=%s callid=%s cap=%d device=%p line=%p\n",
               line->name, line->fullname, line->exten, line->cid_num,
               line->capability, line->parent, line);
         for (i = 0; i < MAX_SUBS; i++) {
            sub = line->subs[i];
            if (!sub)
               continue;
            if (!sub->owner)
               tmp = (void *) -42;
            else
               tmp = sub->owner->_bridge;
            if (sub->subtype != i)
               ast_cli(a->fd, "Warning ! subchannel->subs[%d] have a subtype=%d\n", i,
                     sub->subtype);
            ast_cli(a->fd,
                  "-->subtype=%d chan=%p rtp=%p bridge=%p line=%p alreadygone=%d\n",
                  sub->subtype, sub->owner, sub->rtp, tmp, sub->parent,
                  sub->alreadygone);
         }
         line = line->next;
      }
      device = device->next;
   }
   ast_cli(a->fd, "\nSessions:\n");
   ast_mutex_lock(&sessionlock);
   s = sessions;
   while (s) {
      ast_cli(a->fd,
            "sin=%s timeout=%u state=%d macaddr=%s device=%p session=%p\n",
            ast_inet_ntoa(s->sin.sin_addr), s->timeout, s->state, s->macaddr,
            s->device, s);
      s = s->next;
   }
   ast_mutex_unlock(&sessionlock);

   return CLI_SUCCESS;
}

static char *unistim_sp(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
   BUFFSEND;
   struct unistim_subchannel *sub;
   int i, j = 0, len;
   unsigned char c, cc;
   char tmp[256];

   switch (cmd) {
   case CLI_INIT:
      e->command = "unistim sp";
      e->usage =
         "Usage: unistim sp USTM/line@name hexa\n"
         "       unistim sp USTM/1000@hans 19040004\n";
      return NULL;

   case CLI_GENERATE:
      return NULL;   /* no completion */
   }
   
   if (a->argc < 4)
      return CLI_SHOWUSAGE;

   if (strlen(a->argv[2]) < 9)
      return CLI_SHOWUSAGE;

   len = strlen(a->argv[3]);
   if (len % 2)
      return CLI_SHOWUSAGE;

   ast_copy_string(tmp, a->argv[2] + 5, sizeof(tmp));
   sub = find_subchannel_by_name(tmp);
   if (!sub) {
      ast_cli(a->fd, "Can't find '%s'\n", tmp);
      return CLI_SUCCESS;
   }
   if (!sub->parent->parent->session) {
      ast_cli(a->fd, "'%s' is not connected\n", tmp);
      return CLI_SUCCESS;
   }
   ast_cli(a->fd, "Sending '%s' to %s (%p)\n", a->argv[3], tmp, sub->parent->parent->session);
   for (i = 0; i < len; i++) {
      c = a->argv[3][i];
      if (c >= 'a')
         c -= 'a' - 10;
      else
         c -= '0';
      i++;
      cc = a->argv[3][i];
      if (cc >= 'a')
         cc -= 'a' - 10;
      else
         cc -= '0';
      tmp[j++] = (c << 4) | cc;
   }
   memcpy(buffsend + SIZE_HEADER, tmp, j);
   send_client(SIZE_HEADER + j, buffsend, sub->parent->parent->session);
   return CLI_SUCCESS;
}

static char *unistim_do_debug(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
   switch (cmd) {
   case CLI_INIT:
      e->command = "unistim set debug {on|off}";
      e->usage =
         "Usage: unistim set debug\n" 
         "       Display debug messages.\n";
      return NULL;

   case CLI_GENERATE:
      return NULL;   /* no completion */
   }

   if (a->argc != e->args)
      return CLI_SHOWUSAGE;

   if (!strcasecmp(a->argv[3], "on")) {
      unistimdebug = 1;
      ast_cli(a->fd, "UNISTIM Debugging Enabled\n");
   } else if (!strcasecmp(a->argv[3], "off")) {
      unistimdebug = 0;
      ast_cli(a->fd, "UNISTIM Debugging Disabled\n");
   } else
      return CLI_SHOWUSAGE;

   return CLI_SUCCESS;
}

/*! \brief --- unistim_reload: Force reload of module from cli ---
 * Runs in the asterisk main thread, so don't do anything useful
 * but setting a flag and waiting for do_monitor to do the job
 * in our thread */
static char *unistim_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
   switch (cmd) {
   case CLI_INIT:
      e->command = "unistim reload";
      e->usage =
         "Usage: unistim reload\n" 
         "       Reloads UNISTIM configuration from unistim.conf\n";
      return NULL;

   case CLI_GENERATE:
      return NULL;   /* no completion */
   }

   if (e && a && a->argc != e->args)
      return CLI_SHOWUSAGE;

   if (unistimdebug)
      ast_verb(0, "reload unistim\n");

   ast_mutex_lock(&unistim_reload_lock);
   if (!unistim_reloading)
      unistim_reloading = 1;
   ast_mutex_unlock(&unistim_reload_lock);

   restart_monitor();

   return CLI_SUCCESS;
}

static struct ast_cli_entry unistim_cli[] = {
   AST_CLI_DEFINE(unistim_reload, "Reload UNISTIM configuration"),
   AST_CLI_DEFINE(unistim_info, "Show UNISTIM info"),
   AST_CLI_DEFINE(unistim_sp, "Send packet (for reverse engineering)"),
   AST_CLI_DEFINE(unistim_do_debug, "Toggle UNITSTIM debugging"),
};

static void unquote(char *out, const char *src, int maxlen)
{
   int len = strlen(src);
   if (!len)
      return;
   if ((len > 1) && src[0] == '\"') {
      /* This is a quoted string */
      src++;
      /* Don't take more than what's there */
      len--;
      if (maxlen > len - 1)
         maxlen = len - 1;
      memcpy(out, src, maxlen);
      ((char *) out)[maxlen] = '\0';
   } else
      memcpy(out, src, maxlen);
   return;
}

static int ParseBookmark(const char *text, struct unistim_device *d)
{
   char line[256];
   char *at;
   char *number;
   char *icon;
   int p;
   int len = strlen(text);

   ast_copy_string(line, text, sizeof(line));
   /* Position specified ? */
   if ((len > 2) && (line[1] == '@')) {
      p = line[0];
      if ((p >= '0') && (p <= '5'))
         p -= '0';
      else {
         ast_log(LOG_WARNING,
               "Invalid position for bookmark : must be between 0 and 5\n");
         return 0;
      }
      if (d->softkeyicon[p] != 0) {
         ast_log(LOG_WARNING, "Invalid position %d for bookmark : already used\n:", p);
         return 0;
      }
      memmove(line, line + 2, sizeof(line));
   } else {
      /* No position specified, looking for a free slot */
      for (p = 0; p <= 5; p++) {
         if (!d->softkeyicon[p])
            break;
      }
      if (p > 5) {
         ast_log(LOG_WARNING, "No more free bookmark position\n");
         return 0;
      }
   }
   at = strchr(line, '@');
   if (!at) {
      ast_log(LOG_NOTICE, "Bookmark entry '%s' has no @ (at) sign!\n", text);
      return 0;
   }
   *at = '\0';
   at++;
   number = at;
   at = strchr(at, '@');
   if (ast_strlen_zero(number)) {
      ast_log(LOG_NOTICE, "Bookmark entry '%s' has no number\n", text);
      return 0;
   }
   if (ast_strlen_zero(line)) {
      ast_log(LOG_NOTICE, "Bookmark entry '%s' has no description\n", text);
      return 0;
   }

   at = strchr(number, '@');
   if (!at)
      d->softkeyicon[p] = FAV_ICON_SHARP;     /* default icon */
   else {
      *at = '\0';
      at++;
      icon = at;
      if (ast_strlen_zero(icon)) {
         ast_log(LOG_NOTICE, "Bookmark entry '%s' has no icon value\n", text);
         return 0;
      }
      if (strncmp(icon, "USTM/", 5))
         d->softkeyicon[p] = atoi(icon);
      else {
         d->softkeyicon[p] = 1;
         ast_copy_string(d->softkeydevice[p], icon + 5, sizeof(d->softkeydevice[p]));
      }
   }
   ast_copy_string(d->softkeylabel[p], line, sizeof(d->softkeylabel[p]));
   ast_copy_string(d->softkeynumber[p], number, sizeof(d->softkeynumber[p]));
   if (unistimdebug)
      ast_verb(0, "New bookmark at pos %d label='%s' number='%s' icon=%x\n",
               p, d->softkeylabel[p], d->softkeynumber[p], d->softkeyicon[p]);
   return 1;
}

/* Looking for dynamic icons entries in bookmarks */
static void finish_bookmark(void)
{
   struct unistim_device *d = devices;
   int i;
   while (d) {
      for (i = 0; i < 6; i++) {
         if (d->softkeyicon[i] == 1) {   /* Something for us */
            struct unistim_device *d2 = devices;
            while (d2) {
               if (!strcmp(d->softkeydevice[i], d2->name)) {
                  d->sp[i] = d2;
                  d->softkeyicon[i] = 0;
                  break;
               }
               d2 = d2->next;
            }
            if (d->sp[i] == NULL)
               ast_log(LOG_NOTICE, "Bookmark entry with device %s not found\n",
                     d->softkeydevice[i]);
         }
      }
      d = d->next;
   }
}

static struct unistim_device *build_device(const char *cat, const struct ast_variable *v)
{
   struct unistim_device *d;
   struct unistim_line *l = NULL;
   int create = 1;
   int nbsoftkey, dateformat, timeformat, callhistory;
   char linelabel[AST_MAX_EXTENSION];
   char context[AST_MAX_EXTENSION];
   char ringvolume, ringstyle;

   /* First, we need to know if we already have this name in our list */
   /* Get a lock for the device chained list */
   ast_mutex_lock(&devicelock);
   d = devices;
   while (d) {
      if (!strcmp(d->name, cat)) {
         /* Yep, we alreay have this one */
         if (unistimsock < 0) {
            /* It's a dupe */
            ast_log(LOG_WARNING, "Duplicate entry found (%s), ignoring.\n", cat);
            ast_mutex_unlock(&devicelock);
            return NULL;
         }
         /* we're reloading right now */
         create = 0;
         l = d->lines;
         break;
      }
      d = d->next;
   }
   ast_mutex_unlock(&devicelock);
   if (create) {
      if (!(d = ast_calloc(1, sizeof(*d))))
         return NULL;

      if (!(l = ast_calloc(1, sizeof(*l)))) {
         ast_free(d);
         return NULL;
      }
      ast_copy_string(d->name, cat, sizeof(d->name));
   }
   ast_copy_string(context, DEFAULTCONTEXT, sizeof(context));
   d->contrast = -1;
   d->output = OUTPUT_HANDSET;
   d->previous_output = OUTPUT_HANDSET;
   d->volume = VOLUME_LOW;
   d->mute = MUTE_OFF;
   linelabel[0] = '\0';
   dateformat = 1;
   timeformat = 1;
   ringvolume = 2;
   callhistory = 1;
   ringstyle = 3;
   nbsoftkey = 0;
   while (v) {
      if (!strcasecmp(v->name, "rtp_port"))
         d->rtp_port = atoi(v->value);
      else if (!strcasecmp(v->name, "rtp_method"))
         d->rtp_method = atoi(v->value);
      else if (!strcasecmp(v->name, "status_method"))
         d->status_method = atoi(v->value);
      else if (!strcasecmp(v->name, "device"))
         ast_copy_string(d->id, v->value, sizeof(d->id));
      else if (!strcasecmp(v->name, "tn"))
         ast_copy_string(d->extension_number, v->value, sizeof(d->extension_number));
      else if (!strcasecmp(v->name, "permit") || !strcasecmp(v->name, "deny"))
         d->ha = ast_append_ha(v->name, v->value, d->ha, NULL);
      else if (!strcasecmp(v->name, "context"))
         ast_copy_string(context, v->value, sizeof(context));
      else if (!strcasecmp(v->name, "maintext0"))
         unquote(d->maintext0, v->value, sizeof(d->maintext0) - 1);
      else if (!strcasecmp(v->name, "maintext1"))
         unquote(d->maintext1, v->value, sizeof(d->maintext1) - 1);
      else if (!strcasecmp(v->name, "maintext2"))
         unquote(d->maintext2, v->value, sizeof(d->maintext2) - 1);
      else if (!strcasecmp(v->name, "titledefault"))
         unquote(d->titledefault, v->value, sizeof(d->titledefault) - 1);
      else if (!strcasecmp(v->name, "dateformat"))
         dateformat = atoi(v->value);
      else if (!strcasecmp(v->name, "timeformat"))
         timeformat = atoi(v->value);
      else if (!strcasecmp(v->name, "contrast")) {
         d->contrast = atoi(v->value);
         if ((d->contrast < 0) || (d->contrast > 15)) {
            ast_log(LOG_WARNING, "constrast must be beetween 0 and 15");
            d->contrast = 8;
         }
      } else if (!strcasecmp(v->name, "nat"))
         d->nat = ast_true(v->value);
      else if (!strcasecmp(v->name, "ringvolume"))
         ringvolume = atoi(v->value);
      else if (!strcasecmp(v->name, "ringstyle"))
         ringstyle = atoi(v->value);
      else if (!strcasecmp(v->name, "callhistory"))
         callhistory = atoi(v->value);
      else if (!strcasecmp(v->name, "callerid")) {
         if (!strcasecmp(v->value, "asreceived"))
            l->cid_num[0] = '\0';
         else
            ast_copy_string(l->cid_num, v->value, sizeof(l->cid_num));
      } else if (!strcasecmp(v->name, "language"))
         ast_copy_string(l->language, v->value, sizeof(l->language));
      else if (!strcasecmp(v->name, "country"))
         ast_copy_string(d->country, v->value, sizeof(d->country));
      else if (!strcasecmp(v->name, "accountcode"))
         ast_copy_string(l->accountcode, v->value, sizeof(l->accountcode));
      else if (!strcasecmp(v->name, "amaflags")) {
         int y;
         y = ast_cdr_amaflags2int(v->value);
         if (y < 0)
            ast_log(LOG_WARNING, "Invalid AMA flags: %s at line %d\n", v->value,
                  v->lineno);
         else
            l->amaflags = y;
      } else if (!strcasecmp(v->name, "musiconhold"))
         ast_copy_string(l->musicclass, v->value, sizeof(l->musicclass));
      else if (!strcasecmp(v->name, "callgroup"))
         l->callgroup = ast_get_group(v->value);
      else if (!strcasecmp(v->name, "pickupgroup"))
         l->pickupgroup = ast_get_group(v->value);
      else if (!strcasecmp(v->name, "mailbox"))
         ast_copy_string(l->mailbox, v->value, sizeof(l->mailbox));
      else if (!strcasecmp(v->name, "parkinglot"))
         ast_copy_string(l->parkinglot, v->value, sizeof(l->parkinglot));
      else if (!strcasecmp(v->name, "linelabel"))
         unquote(linelabel, v->value, sizeof(linelabel) - 1);
      else if (!strcasecmp(v->name, "extension")) {
         if (!strcasecmp(v->value, "none"))
            d->extension = EXTENSION_NONE;
         else if (!strcasecmp(v->value, "ask"))
            d->extension = EXTENSION_ASK;
         else if (!strcasecmp(v->value, "line"))
            d->extension = EXTENSION_LINE;
         else
            ast_log(LOG_WARNING, "Unknown extension option.\n");
      } else if (!strcasecmp(v->name, "bookmark")) {
         if (nbsoftkey > 5)
            ast_log(LOG_WARNING,
                  "More than 6 softkeys defined. Ignoring new entries.\n");
         else {
            if (ParseBookmark(v->value, d))
               nbsoftkey++;
         }
      } else if (!strcasecmp(v->name, "line")) {
         int len = strlen(linelabel);

         if (nbsoftkey) {
            ast_log(LOG_WARNING,
                  "You must use bookmark AFTER line=>. Only one line is supported in this version\n");
            if (create) {
               ast_free(d);
               ast_free(l);
            }
            return NULL;
         }
         if (create) {
            ast_mutex_init(&l->lock);
         } else {
            d->to_delete = 0;
            /* reset bookmarks */
            memset(d->softkeylabel, 0, sizeof(d->softkeylabel));
            memset(d->softkeynumber, 0, sizeof(d->softkeynumber));
            memset(d->softkeyicon, 0, sizeof(d->softkeyicon));
            memset(d->softkeydevice, 0, sizeof(d->softkeydevice));
            memset(d->sp, 0, sizeof(d->sp));
         }
         ast_copy_string(l->name, v->value, sizeof(l->name));
         snprintf(l->fullname, sizeof(l->fullname), "USTM/%s@%s", l->name, d->name);
         d->softkeyicon[0] = FAV_ICON_ONHOOK_BLACK;
         if (!len)             /* label is undefined ? */
            ast_copy_string(d->softkeylabel[0], v->value, sizeof(d->softkeylabel[0]));
         else {
            if ((len > 2) && (linelabel[1] == '@')) {
               d->softkeylinepos = linelabel[0];
               if ((d->softkeylinepos >= '0') && (d->softkeylinepos <= '5')) {
                  d->softkeylinepos -= '0';
                  d->softkeyicon[0] = 0;
               } else {
                  ast_log(LOG_WARNING,
                        "Invalid position for linelabel : must be between 0 and 5\n");
                  d->softkeylinepos = 0;
               }
               ast_copy_string(d->softkeylabel[d->softkeylinepos], linelabel + 2,
                           sizeof(d->softkeylabel[d->softkeylinepos]));
               d->softkeyicon[d->softkeylinepos] = FAV_ICON_ONHOOK_BLACK;
            } else
               ast_copy_string(d->softkeylabel[0], linelabel,
                           sizeof(d->softkeylabel[0]));
         }
         nbsoftkey++;
         ast_copy_string(l->context, context, sizeof(l->context));
         if (!ast_strlen_zero(l->mailbox)) {
            if (unistimdebug)
               ast_verb(3, "Setting mailbox '%s' on %s@%s\n", l->mailbox, d->name, l->name);
         }

         l->capability = CAPABILITY;
         l->parent = d;

         if (create) {
            if (!alloc_sub(l, SUB_REAL)) {
               ast_mutex_destroy(&l->lock);
               ast_free(l);
               ast_free(d);
               return NULL;
            }
            l->next = d->lines;
            d->lines = l;
         }
      } else
         ast_log(LOG_WARNING, "Don't know keyword '%s' at line %d\n", v->name,
               v->lineno);
      v = v->next;
   }
   d->ringvolume = ringvolume;
   d->ringstyle = ringstyle;
   d->callhistory = callhistory;
   d->tz = ast_get_indication_zone(d->country);
   if ((d->tz == NULL) && !ast_strlen_zero(d->country))
      ast_log(LOG_WARNING, "Country '%s' was not found in indications.conf\n",
            d->country);
   d->datetimeformat = 56 + (dateformat * 4);
   d->datetimeformat += timeformat;
   if (!d->lines) {
      ast_log(LOG_ERROR, "An Unistim device must have at least one line!\n");
      ast_mutex_destroy(&l->lock);
      ast_free(l);
      ast_free(d);
      return NULL;
   }
   if ((autoprovisioning == AUTOPROVISIONING_TN) &&
      (!ast_strlen_zero(d->extension_number))) {
      d->extension = EXTENSION_TN;
      if (!ast_strlen_zero(d->id))
         ast_log(LOG_WARNING,
               "tn= and device= can't be used together. Ignoring device= entry\n");
      d->id[0] = 'T';       /* magic : this is a tn entry */
      ast_copy_string((d->id) + 1, d->extension_number, sizeof(d->id) - 1);
      d->extension_number[0] = '\0';
   } else if (ast_strlen_zero(d->id)) {
      if (strcmp(d->name, "template")) {
         ast_log(LOG_ERROR, "You must specify the mac address with device=\n");
         ast_mutex_destroy(&l->lock);
         ast_free(l);
         ast_free(d);
         return NULL;
      } else
         strcpy(d->id, "000000000000");
   }
   if (!d->rtp_port)
      d->rtp_port = 10000;
   if (d->contrast == -1)
      d->contrast = 8;
   if (ast_strlen_zero(d->maintext0))
      strcpy(d->maintext0, "Welcome");
   if (ast_strlen_zero(d->maintext1))
      strcpy(d->maintext1, d->name);
   if (ast_strlen_zero(d->titledefault)) {
      struct ast_tm tm = { 0, };
      struct timeval cur_time = ast_tvnow();

      if ((ast_localtime(&cur_time, &tm, 0)) == 0 || ast_strlen_zero(tm.tm_zone)) {
         display_last_error("Error in ast_localtime()");
         ast_copy_string(d->titledefault, "UNISTIM for*", 12);
      } else {
         if (strlen(tm.tm_zone) < 4) {
            strcpy(d->titledefault, "TimeZone ");
            strcat(d->titledefault, tm.tm_zone);
         } else if (strlen(tm.tm_zone) < 9) {
            strcpy(d->titledefault, "TZ ");
            strcat(d->titledefault, tm.tm_zone);
         } else
            ast_copy_string(d->titledefault, tm.tm_zone, 12);
      }
   }
   /* Update the chained link if it's a new device */
   if (create) {
      ast_mutex_lock(&devicelock);
      d->next = devices;
      devices = d;
      ast_mutex_unlock(&devicelock);
      ast_verb(3, "Added device '%s'\n", d->name);
   } else {
      ast_verb(3, "Device '%s' reloaded\n", d->name);
   }
   return d;
}

/*--- reload_config: Re-read unistim.conf config file ---*/
static int reload_config(void)
{
   struct ast_config *cfg;
   struct ast_variable *v;
   struct ast_hostent ahp;
   struct hostent *hp;
   struct sockaddr_in bindaddr = { 0, };
   char *config = "unistim.conf";
   char *cat;
   struct unistim_device *d;
   const int reuseFlag = 1;
   struct unistimsession *s;
   struct ast_flags config_flags = { 0, };

   cfg = ast_config_load(config, config_flags);
   /* We *must* have a config file otherwise stop immediately */
   if (!cfg) {
      ast_log(LOG_ERROR, "Unable to load config %s\n", config);
      return -1;
   }
   
   /* Copy the default jb config over global_jbconf */
   memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));

   unistim_keepalive = 120;
   unistim_port = 0;
   v = ast_variable_browse(cfg, "general");
   while (v) {
      /* handle jb conf */
      if (!ast_jb_read_conf(&global_jbconf, v->name, v->value))
         continue;   
   
      if (!strcasecmp(v->name, "keepalive"))
         unistim_keepalive = atoi(v->value);
      else if (!strcasecmp(v->name, "port"))
         unistim_port = atoi(v->value);
                else if (!strcasecmp(v->name, "tos")) {
                        if (ast_str2tos(v->value, &qos.tos))
                            ast_log(LOG_WARNING, "Invalid tos value at line %d, refer to QoS documentation\n", v->lineno);
                } else if (!strcasecmp(v->name, "tos_audio")) {
                        if (ast_str2tos(v->value, &qos.tos_audio))
                            ast_log(LOG_WARNING, "Invalid tos_audio value at line %d, refer to QoS documentation\n", v->lineno);
                } else if (!strcasecmp(v->name, "cos")) {
                        if (ast_str2cos(v->value, &qos.cos))
                            ast_log(LOG_WARNING, "Invalid cos value at line %d, refer to QoS documentation\n", v->lineno);
                } else if (!strcasecmp(v->name, "cos_audio")) {
                        if (ast_str2cos(v->value, &qos.cos_audio))
                            ast_log(LOG_WARNING, "Invalid cos_audio value at line %d, refer to QoS documentation\n", v->lineno);
      } else if (!strcasecmp(v->name, "autoprovisioning")) {
         if (!strcasecmp(v->value, "no"))
            autoprovisioning = AUTOPROVISIONING_NO;
         else if (!strcasecmp(v->value, "yes"))
            autoprovisioning = AUTOPROVISIONING_YES;
         else if (!strcasecmp(v->value, "db"))
            autoprovisioning = AUTOPROVISIONING_DB;
         else if (!strcasecmp(v->value, "tn"))
            autoprovisioning = AUTOPROVISIONING_TN;
         else
            ast_log(LOG_WARNING, "Unknown autoprovisioning option.\n");
      } else if (!strcasecmp(v->name, "public_ip")) {
         if (!ast_strlen_zero(v->value)) {
            if (!(hp = ast_gethostbyname(v->value, &ahp)))
               ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
            else {
               memcpy(&public_ip.sin_addr, hp->h_addr, sizeof(public_ip.sin_addr));
               public_ip.sin_family = AF_INET;
            }
         }
      }
      v = v->next;
   }
   if ((unistim_keepalive < 10) ||
      (unistim_keepalive >
       255 - (((NB_MAX_RETRANSMIT + 1) * RETRANSMIT_TIMER) / 1000))) {
      ast_log(LOG_ERROR, "keepalive is invalid in %s\n", config);
      ast_config_destroy(cfg);
      return -1;
   }
   packet_send_ping[4] =
      unistim_keepalive + (((NB_MAX_RETRANSMIT + 1) * RETRANSMIT_TIMER) / 1000);
   if ((unistim_port < 1) || (unistim_port > 65535)) {
      ast_log(LOG_ERROR, "port is not set or invalid in %s\n", config);
      ast_config_destroy(cfg);
      return -1;
   }
   unistim_keepalive *= 1000;

   ast_mutex_lock(&devicelock);
   d = devices;
   while (d) {
      if (d->to_delete >= 0)
         d->to_delete = 1;
      d = d->next;
   }
   ast_mutex_unlock(&devicelock);
   /* load the device sections */
   cat = ast_category_browse(cfg, NULL);
   while (cat) {
      if (strcasecmp(cat, "general")) {
         d = build_device(cat, ast_variable_browse(cfg, cat));
      }
      cat = ast_category_browse(cfg, cat);
   }
   ast_mutex_lock(&devicelock);
   d = devices;
   while (d) {
      if (d->to_delete) {
         int i;

         if (unistimdebug)
            ast_verb(0, "Removing device '%s'\n", d->name);
         if (!d->lines) {
            ast_log(LOG_ERROR, "Device '%s' without a line !, aborting\n", d->name);
            ast_config_destroy(cfg);
            return 0;
         }
         if (!d->lines->subs[0]) {
            ast_log(LOG_ERROR, "Device '%s' without a subchannel !, aborting\n",
                  d->name);
            ast_config_destroy(cfg);
            return 0;
         }
         if (d->lines->subs[0]->owner) {
            ast_log(LOG_WARNING,
                  "Device '%s' was not deleted : a call is in progress. Try again later.\n",
                  d->name);
            d = d->next;
            continue;
         }
         ast_mutex_destroy(&d->lines->subs[0]->lock);
         ast_free(d->lines->subs[0]);
         for (i = 1; i < MAX_SUBS; i++) {
            if (d->lines->subs[i]) {
               ast_log(LOG_WARNING,
                     "Device '%s' with threeway call subchannels allocated, aborting.\n",
                     d->name);
               break;
            }
         }
         if (i < MAX_SUBS) {
            d = d->next;
            continue;
         }
         ast_mutex_destroy(&d->lines->lock);
         ast_free(d->lines);
         if (d->session) {
            if (sessions == d->session)
               sessions = d->session->next;
            else {
               s = sessions;
               while (s) {
                  if (s->next == d->session) {
                     s->next = d->session->next;
                     break;
                  }
                  s = s->next;
               }
            }
            ast_mutex_destroy(&d->session->lock);
            ast_free(d->session);
         }
         if (devices == d)
            devices = d->next;
         else {
            struct unistim_device *d2 = devices;
            while (d2) {
               if (d2->next == d) {
                  d2->next = d->next;
                  break;
               }
               d2 = d2->next;
            }
         }
         ast_free(d);
         d = devices;
         continue;
      }
      d = d->next;
   }
   finish_bookmark();
   ast_mutex_unlock(&devicelock);
   ast_config_destroy(cfg);
   ast_mutex_lock(&sessionlock);
   s = sessions;
   while (s) {
      if (s->device)
         refresh_all_favorite(s);
      s = s->next;
   }
   ast_mutex_unlock(&sessionlock);
   /* We don't recreate a socket when reloading (locks would be necessary). */
   if (unistimsock > -1)
      return 0;
   bindaddr.sin_addr.s_addr = INADDR_ANY;
   bindaddr.sin_port = htons(unistim_port);
   bindaddr.sin_family = AF_INET;
   unistimsock = socket(AF_INET, SOCK_DGRAM, 0);
   if (unistimsock < 0) {
      ast_log(LOG_WARNING, "Unable to create UNISTIM socket: %s\n", strerror(errno));
      return -1;
   }
#ifdef HAVE_PKTINFO
   {
      const int pktinfoFlag = 1;
      setsockopt(unistimsock, IPPROTO_IP, IP_PKTINFO, &pktinfoFlag,
               sizeof(pktinfoFlag));
   }
#else
   if (public_ip.sin_family == 0) {
      ast_log(LOG_WARNING,
            "Your OS does not support IP_PKTINFO, you must set public_ip.\n");
      unistimsock = -1;
      return -1;
   }
#endif
   setsockopt(unistimsock, SOL_SOCKET, SO_REUSEADDR, (const char *) &reuseFlag,
            sizeof(reuseFlag));
   if (bind(unistimsock, (struct sockaddr *) &bindaddr, sizeof(bindaddr)) < 0) {
      ast_log(LOG_WARNING, "Failed to bind to %s:%d: %s\n",
            ast_inet_ntoa(bindaddr.sin_addr), htons(bindaddr.sin_port),
            strerror(errno));
      close(unistimsock);
      unistimsock = -1;
   } else {
      ast_verb(2, "UNISTIM Listening on %s:%d\n", ast_inet_ntoa(bindaddr.sin_addr), htons(bindaddr.sin_port));
      ast_netsock_set_qos(unistimsock, qos.tos, qos.cos, "UNISTIM");
   }
   return 0;
}

static enum ast_rtp_get_result unistim_get_vrtp_peer(struct ast_channel *chan, 
   struct ast_rtp **rtp)
{
   return AST_RTP_TRY_NATIVE;
}

static enum ast_rtp_get_result unistim_get_rtp_peer(struct ast_channel *chan, 
   struct ast_rtp **rtp)
{
   struct unistim_subchannel *sub;
   enum ast_rtp_get_result res = AST_RTP_GET_FAILED;

   if (unistimdebug)
      ast_verb(0, "unistim_get_rtp_peer called\n");
      
   sub = chan->tech_pvt;
   if (sub && sub->rtp) {
      *rtp = sub->rtp;
      res = AST_RTP_TRY_NATIVE;
   }

   return res;
}

static int unistim_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, 
   struct ast_rtp *vrtp, struct ast_rtp *trtp, int codecs, int nat_active)
{
   struct unistim_subchannel *sub;

   if (unistimdebug)
      ast_verb(0, "unistim_set_rtp_peer called\n");

   sub = chan->tech_pvt;

   if (sub)
      return 0;

   return -1;
}

static struct ast_rtp_protocol unistim_rtp = {
   .type = channel_type,
   .get_rtp_info = unistim_get_rtp_peer,
   .get_vrtp_info = unistim_get_vrtp_peer,
   .set_rtp_peer = unistim_set_rtp_peer,
};

/*--- load_module: PBX load module - initialization ---*/
int load_module(void)
{
   int res;

   if (!(buff = ast_malloc(SIZE_PAGE)))
      goto buff_failed;

   io = io_context_create();
   if (!io) {
      ast_log(LOG_ERROR, "Failed to allocate IO context\n");
      goto io_failed;
   }

   sched = sched_context_create();
   if (!sched) {
      ast_log(LOG_ERROR, "Failed to allocate scheduler context\n");
      goto sched_failed;
   }

   res = reload_config();
   if (res)
      return AST_MODULE_LOAD_DECLINE;

   /* Make sure we can register our unistim channel type */
   if (ast_channel_register(&unistim_tech)) {
      ast_log(LOG_ERROR, "Unable to register channel type '%s'\n", channel_type);
      goto chanreg_failed;
   } 

   ast_rtp_proto_register(&unistim_rtp);

   ast_cli_register_multiple(unistim_cli, ARRAY_LEN(unistim_cli));

   restart_monitor();

   return AST_MODULE_LOAD_SUCCESS;

chanreg_failed:
   /*! XXX \todo Leaking anything allocated by reload_config() ... */
   sched_context_destroy(sched);
   sched = NULL;
sched_failed:
   io_context_destroy(io);
   io = NULL;
io_failed:
   ast_free(buff);
   buff = NULL;
buff_failed:
   return AST_MODULE_LOAD_FAILURE;
}

static int unload_module(void)
{
   /* First, take us out of the channel loop */
   if (sched)
      sched_context_destroy(sched);

   ast_cli_unregister_multiple(unistim_cli, ARRAY_LEN(unistim_cli));

   ast_channel_unregister(&unistim_tech);
   ast_rtp_proto_unregister(&unistim_rtp);

   ast_mutex_lock(&monlock);
   if (monitor_thread && (monitor_thread != AST_PTHREADT_STOP) && (monitor_thread != AST_PTHREADT_NULL)) {
      pthread_cancel(monitor_thread);
      pthread_kill(monitor_thread, SIGURG);
      pthread_join(monitor_thread, NULL);
   }
   monitor_thread = AST_PTHREADT_STOP;
   ast_mutex_unlock(&monlock);

   if (buff)
      ast_free(buff);
   if (unistimsock > -1)
      close(unistimsock);

   return 0;
}

/*! reload: Part of Asterisk module interface ---*/
int reload(void)
{
   unistim_reload(NULL, 0, NULL);
   return 0;
}

AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "UNISTIM Protocol (USTM)",
    .load = load_module,
    .unload = unload_module,
    .reload = reload,
);