33 #include <netlink-private/netlink.h> 34 #include <netlink-private/utils.h> 35 #include <netlink/netlink.h> 36 #include <netlink/cache.h> 37 #include <netlink/utils.h> 38 #include <netlink/data.h> 39 #include <netlink/hashtable.h> 40 #include <netlink/route/rtnl.h> 41 #include <netlink/route/route.h> 42 #include <netlink/route/link.h> 43 #include <netlink/route/nexthop.h> 46 #define ROUTE_ATTR_FAMILY 0x000001 47 #define ROUTE_ATTR_TOS 0x000002 48 #define ROUTE_ATTR_TABLE 0x000004 49 #define ROUTE_ATTR_PROTOCOL 0x000008 50 #define ROUTE_ATTR_SCOPE 0x000010 51 #define ROUTE_ATTR_TYPE 0x000020 52 #define ROUTE_ATTR_FLAGS 0x000040 53 #define ROUTE_ATTR_DST 0x000080 54 #define ROUTE_ATTR_SRC 0x000100 55 #define ROUTE_ATTR_IIF 0x000200 56 #define ROUTE_ATTR_OIF 0x000400 57 #define ROUTE_ATTR_GATEWAY 0x000800 58 #define ROUTE_ATTR_PRIO 0x001000 59 #define ROUTE_ATTR_PREF_SRC 0x002000 60 #define ROUTE_ATTR_METRICS 0x004000 61 #define ROUTE_ATTR_MULTIPATH 0x008000 62 #define ROUTE_ATTR_REALMS 0x010000 63 #define ROUTE_ATTR_CACHEINFO 0x020000 66 static void route_constructor(
struct nl_object *c)
68 struct rtnl_route *r = (
struct rtnl_route *) c;
70 r->rt_family = AF_UNSPEC;
71 r->rt_scope = RT_SCOPE_NOWHERE;
72 r->rt_table = RT_TABLE_MAIN;
73 r->rt_protocol = RTPROT_STATIC;
74 r->rt_type = RTN_UNICAST;
77 nl_init_list_head(&r->rt_nexthops);
80 static void route_free_data(
struct nl_object *c)
82 struct rtnl_route *r = (
struct rtnl_route *) c;
83 struct rtnl_nexthop *nh, *tmp;
92 nl_list_for_each_entry_safe(nh, tmp, &r->rt_nexthops, rtnh_list) {
93 rtnl_route_remove_nexthop(r, nh);
94 rtnl_route_nh_free(nh);
98 static int route_clone(
struct nl_object *_dst,
struct nl_object *_src)
100 struct rtnl_route *dst = (
struct rtnl_route *) _dst;
101 struct rtnl_route *src = (
struct rtnl_route *) _src;
102 struct rtnl_nexthop *nh, *
new;
112 if (src->rt_pref_src)
119 nl_init_list_head(&dst->rt_nexthops);
120 nl_list_for_each_entry(nh, &src->rt_nexthops, rtnh_list) {
121 new = rtnl_route_nh_clone(nh);
125 rtnl_route_add_nexthop(dst,
new);
131 static void route_dump_line(
struct nl_object *a,
struct nl_dump_params *p)
133 struct rtnl_route *r = (
struct rtnl_route *) a;
134 int cache = 0, flags;
137 if (r->rt_flags & RTM_F_CLONED)
140 nl_dump_line(p,
"%s ", nl_af2str(r->rt_family, buf,
sizeof(buf)));
145 if (!(r->ce_mask & ROUTE_ATTR_DST) ||
151 if (r->ce_mask & ROUTE_ATTR_TABLE && !cache)
153 rtnl_route_table2str(r->rt_table, buf,
sizeof(buf)));
155 if (r->ce_mask & ROUTE_ATTR_TYPE)
157 nl_rtntype2str(r->rt_type, buf,
sizeof(buf)));
159 if (r->ce_mask & ROUTE_ATTR_TOS && r->rt_tos != 0)
160 nl_dump(p,
"tos %#x ", r->rt_tos);
162 if (r->ce_mask & ROUTE_ATTR_MULTIPATH) {
163 struct rtnl_nexthop *nh;
165 nl_list_for_each_entry(nh, &r->rt_nexthops, rtnh_list) {
166 p->
dp_ivar = NH_DUMP_FROM_ONELINE;
167 rtnl_route_nh_dump(nh, p);
171 flags = r->rt_flags & ~(RTM_F_CLONED);
172 if (r->ce_mask & ROUTE_ATTR_FLAGS && flags) {
176 #define PRINT_FLAG(f) if (flags & RTNH_F_##f) { \ 177 flags &= ~RTNH_F_##f; nl_dump(p, #f "%s", flags ? "," : ""); } 180 PRINT_FLAG(PERVASIVE);
183 #define PRINT_FLAG(f) if (flags & RTM_F_##f) { \ 184 flags &= ~RTM_F_##f; nl_dump(p, #f "%s", flags ? "," : ""); } 186 PRINT_FLAG(EQUALIZE);
190 #define PRINT_FLAG(f) if (flags & RTCF_##f) { \ 191 flags &= ~RTCF_##f; nl_dump(p, #f "%s", flags ? "," : ""); } 193 PRINT_FLAG(REDIRECTED);
194 PRINT_FLAG(DOREDIRECT);
195 PRINT_FLAG(DIRECTSRC);
197 PRINT_FLAG(BROADCAST);
198 PRINT_FLAG(MULTICAST);
208 static void route_dump_details(
struct nl_object *a,
struct nl_dump_params *p)
210 struct rtnl_route *r = (
struct rtnl_route *) a;
211 struct nl_cache *link_cache;
217 route_dump_line(a, p);
218 nl_dump_line(p,
" ");
220 if (r->ce_mask & ROUTE_ATTR_PREF_SRC)
221 nl_dump(p,
"preferred-src %s ",
224 if (r->ce_mask & ROUTE_ATTR_SCOPE && r->rt_scope != RT_SCOPE_NOWHERE)
226 rtnl_scope2str(r->rt_scope, buf,
sizeof(buf)));
228 if (r->ce_mask & ROUTE_ATTR_PRIO)
229 nl_dump(p,
"priority %#x ", r->rt_prio);
231 if (r->ce_mask & ROUTE_ATTR_PROTOCOL)
233 rtnl_route_proto2str(r->rt_protocol, buf,
sizeof(buf)));
235 if (r->ce_mask & ROUTE_ATTR_IIF) {
241 nl_dump(p,
"iif %d ", r->rt_iif);
244 if (r->ce_mask & ROUTE_ATTR_SRC)
249 if (r->ce_mask & ROUTE_ATTR_MULTIPATH) {
250 struct rtnl_nexthop *nh;
252 nl_list_for_each_entry(nh, &r->rt_nexthops, rtnh_list) {
253 nl_dump_line(p,
" ");
254 p->
dp_ivar = NH_DUMP_FROM_DETAILS;
255 rtnl_route_nh_dump(nh, p);
260 if ((r->ce_mask & ROUTE_ATTR_CACHEINFO) && r->rt_cacheinfo.rtci_error) {
261 nl_dump_line(p,
" cacheinfo error %d (%s)\n",
262 r->rt_cacheinfo.rtci_error,
263 nl_strerror_l(-r->rt_cacheinfo.rtci_error));
266 if (r->ce_mask & ROUTE_ATTR_METRICS) {
267 nl_dump_line(p,
" metrics [");
268 for (i = 0; i < RTAX_MAX; i++)
269 if (r->rt_metrics_mask & (1 << i))
271 rtnl_route_metric2str(i+1,
278 nl_cache_put(link_cache);
281 static void route_dump_stats(
struct nl_object *obj,
struct nl_dump_params *p)
283 struct rtnl_route *route = (
struct rtnl_route *) obj;
285 route_dump_details(obj, p);
287 if (route->ce_mask & ROUTE_ATTR_CACHEINFO) {
290 nl_dump_line(p,
" used %u refcnt %u last-use %us " 292 ci->rtci_used, ci->rtci_clntref,
298 static void route_keygen(
struct nl_object *obj, uint32_t *hashkey,
301 struct rtnl_route *route = (
struct rtnl_route *) obj;
302 unsigned int rkey_sz;
303 struct nl_addr *addr = NULL;
304 struct route_hash_key {
310 } __attribute__((packed)) *rkey;
312 char buf[INET6_ADDRSTRLEN+5];
316 addr = route->rt_dst;
318 rkey_sz =
sizeof(*rkey);
321 rkey = calloc(1, rkey_sz);
323 NL_DBG(2,
"Warning: calloc failed for %d bytes...\n", rkey_sz);
327 rkey->rt_family = route->rt_family;
328 rkey->rt_tos = route->rt_tos;
329 rkey->rt_table = route->rt_table;
330 rkey->rt_prio = route->rt_prio;
335 *hashkey = nl_hash(rkey, rkey_sz, 0) % table_sz;
337 NL_DBG(5,
"route %p key (fam %d tos %d table %d addr %s) keysz %d " 338 "hash 0x%x\n", route, rkey->rt_family, rkey->rt_tos,
339 rkey->rt_table,
nl_addr2str(addr, buf,
sizeof(buf)),
347 static uint64_t route_compare(
struct nl_object *_a,
struct nl_object *_b,
348 uint64_t attrs,
int flags)
350 struct rtnl_route *a = (
struct rtnl_route *) _a;
351 struct rtnl_route *b = (
struct rtnl_route *) _b;
352 struct rtnl_nexthop *nh_a, *nh_b;
356 #define ROUTE_DIFF(ATTR, EXPR) ATTR_DIFF(attrs, ROUTE_ATTR_##ATTR, a, b, EXPR) 358 diff |= ROUTE_DIFF(FAMILY, a->rt_family != b->rt_family);
359 diff |= ROUTE_DIFF(TOS, a->rt_tos != b->rt_tos);
360 diff |= ROUTE_DIFF(TABLE, a->rt_table != b->rt_table);
361 diff |= ROUTE_DIFF(PROTOCOL, a->rt_protocol != b->rt_protocol);
362 diff |= ROUTE_DIFF(SCOPE, a->rt_scope != b->rt_scope);
363 diff |= ROUTE_DIFF(TYPE, a->rt_type != b->rt_type);
364 diff |= ROUTE_DIFF(PRIO, a->rt_prio != b->rt_prio);
365 diff |= ROUTE_DIFF(DST,
nl_addr_cmp(a->rt_dst, b->rt_dst));
366 diff |= ROUTE_DIFF(SRC,
nl_addr_cmp(a->rt_src, b->rt_src));
367 diff |= ROUTE_DIFF(IIF, a->rt_iif != b->rt_iif);
368 diff |= ROUTE_DIFF(PREF_SRC,
nl_addr_cmp(a->rt_pref_src,
371 if (flags & LOOSE_COMPARISON) {
372 nl_list_for_each_entry(nh_b, &b->rt_nexthops, rtnh_list) {
374 nl_list_for_each_entry(nh_a, &a->rt_nexthops,
376 if (!rtnl_route_nh_compare(nh_a, nh_b,
387 for (i = 0; i < RTAX_MAX - 1; i++) {
388 if (a->rt_metrics_mask & (1 << i) &&
389 (!(b->rt_metrics_mask & (1 << i)) ||
390 a->rt_metrics[i] != b->rt_metrics[i]))
391 diff |= ROUTE_DIFF(METRICS, 1);
394 diff |= ROUTE_DIFF(FLAGS,
395 (a->rt_flags ^ b->rt_flags) & b->rt_flag_mask);
397 if (a->rt_nr_nh != b->rt_nr_nh)
401 nl_list_for_each_entry(nh_a, &a->rt_nexthops, rtnh_list) {
403 nl_list_for_each_entry(nh_b, &b->rt_nexthops,
405 if (!rtnl_route_nh_compare(nh_a, nh_b, ~0, 0)) {
416 nl_list_for_each_entry(nh_b, &b->rt_nexthops, rtnh_list) {
418 nl_list_for_each_entry(nh_a, &a->rt_nexthops,
420 if (!rtnl_route_nh_compare(nh_a, nh_b, ~0, 0)) {
429 for (i = 0; i < RTAX_MAX - 1; i++) {
430 if ((a->rt_metrics_mask & (1 << i)) ^
431 (b->rt_metrics_mask & (1 << i)))
432 diff |= ROUTE_DIFF(METRICS, 1);
434 diff |= ROUTE_DIFF(METRICS,
435 a->rt_metrics[i] != b->rt_metrics[i]);
438 diff |= ROUTE_DIFF(FLAGS, a->rt_flags != b->rt_flags);
445 diff |= ROUTE_DIFF(MULTIPATH, 1);
451 static int route_update(
struct nl_object *old_obj,
struct nl_object *new_obj)
453 struct rtnl_route *new_route = (
struct rtnl_route *) new_obj;
454 struct rtnl_route *old_route = (
struct rtnl_route *) old_obj;
455 struct rtnl_nexthop *new_nh;
456 int action = new_obj->ce_msgtype;
458 char buf[INET6_ADDRSTRLEN+5];
468 if (new_route->rt_family != AF_INET6 ||
469 new_route->rt_table == RT_TABLE_LOCAL)
470 return -NLE_OPNOTSUPP;
476 if (rtnl_route_get_nnexthops(new_route) != 1)
477 return -NLE_OPNOTSUPP;
484 new_nh = rtnl_route_nexthop_n(new_route, 0);
485 if (!new_nh || !rtnl_route_nh_get_gateway(new_nh))
486 return -NLE_OPNOTSUPP;
489 case RTM_NEWROUTE : {
490 struct rtnl_nexthop *cloned_nh;
495 cloned_nh = rtnl_route_nh_clone(new_nh);
498 rtnl_route_add_nexthop(old_route, cloned_nh);
500 NL_DBG(2,
"Route obj %p updated. Added " 501 "nexthop %p via %s\n", old_route, cloned_nh,
506 case RTM_DELROUTE : {
507 struct rtnl_nexthop *old_nh;
515 if (rtnl_route_get_nnexthops(old_route) <= 1)
516 return -NLE_OPNOTSUPP;
521 nl_list_for_each_entry(old_nh, &old_route->rt_nexthops,
523 if (!rtnl_route_nh_compare(old_nh, new_nh, ~0, 0)) {
525 rtnl_route_remove_nexthop(old_route, old_nh);
527 NL_DBG(2,
"Route obj %p updated. Removed " 528 "nexthop %p via %s\n", old_route,
533 rtnl_route_nh_free(old_nh);
540 NL_DBG(2,
"Unknown action associated " 541 "to object %p during route update\n", new_obj);
542 return -NLE_OPNOTSUPP;
548 static const struct trans_tbl route_attrs[] = {
549 __ADD(ROUTE_ATTR_FAMILY, family),
550 __ADD(ROUTE_ATTR_TOS, tos),
551 __ADD(ROUTE_ATTR_TABLE, table),
552 __ADD(ROUTE_ATTR_PROTOCOL, protocol),
553 __ADD(ROUTE_ATTR_SCOPE, scope),
554 __ADD(ROUTE_ATTR_TYPE, type),
555 __ADD(ROUTE_ATTR_FLAGS, flags),
556 __ADD(ROUTE_ATTR_DST, dst),
557 __ADD(ROUTE_ATTR_SRC, src),
558 __ADD(ROUTE_ATTR_IIF, iif),
559 __ADD(ROUTE_ATTR_OIF, oif),
560 __ADD(ROUTE_ATTR_GATEWAY, gateway),
561 __ADD(ROUTE_ATTR_PRIO, prio),
562 __ADD(ROUTE_ATTR_PREF_SRC, pref_src),
563 __ADD(ROUTE_ATTR_METRICS, metrics),
564 __ADD(ROUTE_ATTR_MULTIPATH, multipath),
565 __ADD(ROUTE_ATTR_REALMS, realms),
566 __ADD(ROUTE_ATTR_CACHEINFO, cacheinfo),
569 static char *route_attrs2str(
int attrs,
char *buf,
size_t len)
571 return __flags2str(attrs, buf, len, route_attrs,
572 ARRAY_SIZE(route_attrs));
580 struct rtnl_route *rtnl_route_alloc(
void)
585 void rtnl_route_get(
struct rtnl_route *route)
590 void rtnl_route_put(
struct rtnl_route *route)
602 void rtnl_route_set_table(
struct rtnl_route *route, uint32_t table)
604 route->rt_table = table;
605 route->ce_mask |= ROUTE_ATTR_TABLE;
608 uint32_t rtnl_route_get_table(
struct rtnl_route *route)
610 return route->rt_table;
613 void rtnl_route_set_scope(
struct rtnl_route *route, uint8_t scope)
615 route->rt_scope = scope;
616 route->ce_mask |= ROUTE_ATTR_SCOPE;
619 uint8_t rtnl_route_get_scope(
struct rtnl_route *route)
621 return route->rt_scope;
624 void rtnl_route_set_tos(
struct rtnl_route *route, uint8_t tos)
627 route->ce_mask |= ROUTE_ATTR_TOS;
630 uint8_t rtnl_route_get_tos(
struct rtnl_route *route)
632 return route->rt_tos;
635 void rtnl_route_set_protocol(
struct rtnl_route *route, uint8_t protocol)
637 route->rt_protocol = protocol;
638 route->ce_mask |= ROUTE_ATTR_PROTOCOL;
641 uint8_t rtnl_route_get_protocol(
struct rtnl_route *route)
643 return route->rt_protocol;
646 void rtnl_route_set_priority(
struct rtnl_route *route, uint32_t prio)
648 route->rt_prio = prio;
649 route->ce_mask |= ROUTE_ATTR_PRIO;
652 uint32_t rtnl_route_get_priority(
struct rtnl_route *route)
654 return route->rt_prio;
657 int rtnl_route_set_family(
struct rtnl_route *route, uint8_t family)
659 if (family != AF_INET && family != AF_INET6 && family != AF_DECnet)
660 return -NLE_AF_NOSUPPORT;
662 route->rt_family = family;
663 route->ce_mask |= ROUTE_ATTR_FAMILY;
668 uint8_t rtnl_route_get_family(
struct rtnl_route *route)
670 return route->rt_family;
673 int rtnl_route_set_dst(
struct rtnl_route *route,
struct nl_addr *addr)
675 if (route->ce_mask & ROUTE_ATTR_FAMILY) {
676 if (addr->a_family != route->rt_family)
677 return -NLE_AF_MISMATCH;
679 route->rt_family = addr->a_family;
685 route->rt_dst = addr;
687 route->ce_mask |= (ROUTE_ATTR_DST | ROUTE_ATTR_FAMILY);
692 struct nl_addr *rtnl_route_get_dst(
struct rtnl_route *route)
694 return route->rt_dst;
697 int rtnl_route_set_src(
struct rtnl_route *route,
struct nl_addr *addr)
699 if (addr->a_family == AF_INET)
700 return -NLE_SRCRT_NOSUPPORT;
702 if (route->ce_mask & ROUTE_ATTR_FAMILY) {
703 if (addr->a_family != route->rt_family)
704 return -NLE_AF_MISMATCH;
706 route->rt_family = addr->a_family;
712 route->rt_src = addr;
713 route->ce_mask |= (ROUTE_ATTR_SRC | ROUTE_ATTR_FAMILY);
718 struct nl_addr *rtnl_route_get_src(
struct rtnl_route *route)
720 return route->rt_src;
723 int rtnl_route_set_type(
struct rtnl_route *route, uint8_t type)
728 route->rt_type = type;
729 route->ce_mask |= ROUTE_ATTR_TYPE;
734 uint8_t rtnl_route_get_type(
struct rtnl_route *route)
736 return route->rt_type;
739 void rtnl_route_set_flags(
struct rtnl_route *route, uint32_t flags)
741 route->rt_flag_mask |= flags;
742 route->rt_flags |= flags;
743 route->ce_mask |= ROUTE_ATTR_FLAGS;
746 void rtnl_route_unset_flags(
struct rtnl_route *route, uint32_t flags)
748 route->rt_flag_mask |= flags;
749 route->rt_flags &= ~flags;
750 route->ce_mask |= ROUTE_ATTR_FLAGS;
753 uint32_t rtnl_route_get_flags(
struct rtnl_route *route)
755 return route->rt_flags;
758 int rtnl_route_set_metric(
struct rtnl_route *route,
int metric, uint32_t value)
760 if (metric > RTAX_MAX || metric < 1)
763 route->rt_metrics[metric - 1] = value;
765 if (!(route->rt_metrics_mask & (1 << (metric - 1)))) {
766 route->rt_nmetrics++;
767 route->rt_metrics_mask |= (1 << (metric - 1));
770 route->ce_mask |= ROUTE_ATTR_METRICS;
775 int rtnl_route_unset_metric(
struct rtnl_route *route,
int metric)
777 if (metric > RTAX_MAX || metric < 1)
780 if (route->rt_metrics_mask & (1 << (metric - 1))) {
781 route->rt_nmetrics--;
782 route->rt_metrics_mask &= ~(1 << (metric - 1));
788 int rtnl_route_get_metric(
struct rtnl_route *route,
int metric, uint32_t *value)
790 if (metric > RTAX_MAX || metric < 1)
793 if (!(route->rt_metrics_mask & (1 << (metric - 1))))
794 return -NLE_OBJ_NOTFOUND;
797 *value = route->rt_metrics[metric - 1];
802 int rtnl_route_set_pref_src(
struct rtnl_route *route,
struct nl_addr *addr)
804 if (route->ce_mask & ROUTE_ATTR_FAMILY) {
805 if (addr->a_family != route->rt_family)
806 return -NLE_AF_MISMATCH;
808 route->rt_family = addr->a_family;
810 if (route->rt_pref_src)
814 route->rt_pref_src = addr;
815 route->ce_mask |= (ROUTE_ATTR_PREF_SRC | ROUTE_ATTR_FAMILY);
820 struct nl_addr *rtnl_route_get_pref_src(
struct rtnl_route *route)
822 return route->rt_pref_src;
825 void rtnl_route_set_iif(
struct rtnl_route *route,
int ifindex)
827 route->rt_iif = ifindex;
828 route->ce_mask |= ROUTE_ATTR_IIF;
831 int rtnl_route_get_iif(
struct rtnl_route *route)
833 return route->rt_iif;
836 void rtnl_route_add_nexthop(
struct rtnl_route *route,
struct rtnl_nexthop *nh)
838 nl_list_add_tail(&nh->rtnh_list, &route->rt_nexthops);
840 route->ce_mask |= ROUTE_ATTR_MULTIPATH;
843 void rtnl_route_remove_nexthop(
struct rtnl_route *route,
struct rtnl_nexthop *nh)
845 if (route->ce_mask & ROUTE_ATTR_MULTIPATH) {
847 nl_list_del(&nh->rtnh_list);
851 struct nl_list_head *rtnl_route_get_nexthops(
struct rtnl_route *route)
853 if (route->ce_mask & ROUTE_ATTR_MULTIPATH)
854 return &route->rt_nexthops;
859 int rtnl_route_get_nnexthops(
struct rtnl_route *route)
861 if (route->ce_mask & ROUTE_ATTR_MULTIPATH)
862 return route->rt_nr_nh;
867 void rtnl_route_foreach_nexthop(
struct rtnl_route *r,
868 void (*cb)(
struct rtnl_nexthop *,
void *),
871 struct rtnl_nexthop *nh;
873 if (r->ce_mask & ROUTE_ATTR_MULTIPATH) {
874 nl_list_for_each_entry(nh, &r->rt_nexthops, rtnh_list) {
880 struct rtnl_nexthop *rtnl_route_nexthop_n(
struct rtnl_route *r,
int n)
882 struct rtnl_nexthop *nh;
885 if (r->ce_mask & ROUTE_ATTR_MULTIPATH && r->rt_nr_nh > n) {
887 nl_list_for_each_entry(nh, &r->rt_nexthops, rtnh_list) {
888 if (i == n)
return nh;
917 if (route->rt_type == RTN_LOCAL)
918 return RT_SCOPE_HOST;
920 if (!nl_list_empty(&route->rt_nexthops)) {
921 struct rtnl_nexthop *nh;
927 nl_list_for_each_entry(nh, &route->rt_nexthops, rtnh_list) {
928 if (nh->rtnh_gateway)
929 return RT_SCOPE_UNIVERSE;
933 return RT_SCOPE_LINK;
938 static struct nla_policy route_policy[RTA_MAX+1] = {
940 [RTA_OIF] = { .type =
NLA_U32 },
941 [RTA_PRIORITY] = { .type =
NLA_U32 },
942 [RTA_FLOW] = { .type =
NLA_U32 },
943 [RTA_CACHEINFO] = { .minlen =
sizeof(
struct rta_cacheinfo) },
948 static int parse_multipath(
struct rtnl_route *route,
struct nlattr *attr)
950 struct rtnl_nexthop *nh = NULL;
951 struct rtnexthop *rtnh =
nla_data(attr);
955 while (tlen >=
sizeof(*rtnh) && tlen >= rtnh->rtnh_len) {
956 nh = rtnl_route_nh_alloc();
960 rtnl_route_nh_set_weight(nh, rtnh->rtnh_hops);
961 rtnl_route_nh_set_ifindex(nh, rtnh->rtnh_ifindex);
962 rtnl_route_nh_set_flags(nh, rtnh->rtnh_flags);
964 if (rtnh->rtnh_len >
sizeof(*rtnh)) {
965 struct nlattr *ntb[RTA_MAX + 1];
967 err =
nla_parse(ntb, RTA_MAX, (
struct nlattr *)
969 rtnh->rtnh_len -
sizeof(*rtnh),
974 if (ntb[RTA_GATEWAY]) {
975 struct nl_addr *addr;
984 rtnl_route_nh_set_gateway(nh, addr);
992 rtnl_route_nh_set_realms(nh, realms);
996 rtnl_route_add_nexthop(route, nh);
997 tlen -= RTNH_ALIGN(rtnh->rtnh_len);
998 rtnh = RTNH_NEXT(rtnh);
1004 rtnl_route_nh_free(nh);
1009 int rtnl_route_parse(
struct nlmsghdr *nlh,
struct rtnl_route **result)
1012 struct rtnl_route *route;
1013 struct nlattr *tb[RTA_MAX + 1];
1014 struct nl_addr *src = NULL, *dst = NULL, *addr;
1015 struct rtnl_nexthop *old_nh = NULL;
1018 route = rtnl_route_alloc();
1024 route->ce_msgtype = nlh->nlmsg_type;
1026 err =
nlmsg_parse(nlh,
sizeof(
struct rtmsg), tb, RTA_MAX, route_policy);
1031 route->rt_family = family = rtm->rtm_family;
1032 route->rt_tos = rtm->rtm_tos;
1033 route->rt_table = rtm->rtm_table;
1034 route->rt_type = rtm->rtm_type;
1035 route->rt_scope = rtm->rtm_scope;
1036 route->rt_protocol = rtm->rtm_protocol;
1037 route->rt_flags = rtm->rtm_flags;
1040 route->ce_mask |= ROUTE_ATTR_FAMILY | ROUTE_ATTR_TOS |
1041 ROUTE_ATTR_TABLE | ROUTE_ATTR_TYPE |
1042 ROUTE_ATTR_SCOPE | ROUTE_ATTR_PROTOCOL |
1043 ROUTE_ATTR_FLAGS | ROUTE_ATTR_PRIO;
1055 err = rtnl_route_set_dst(route, dst);
1064 }
else if (rtm->rtm_src_len)
1070 rtnl_route_set_src(route, src);
1075 rtnl_route_set_table(route,
nla_get_u32(tb[RTA_TABLE]));
1078 rtnl_route_set_iif(route,
nla_get_u32(tb[RTA_IIF]));
1080 if (tb[RTA_PRIORITY])
1081 rtnl_route_set_priority(route,
nla_get_u32(tb[RTA_PRIORITY]));
1083 if (tb[RTA_PREFSRC]) {
1086 rtnl_route_set_pref_src(route, addr);
1090 if (tb[RTA_METRICS]) {
1091 struct nlattr *mtb[RTAX_MAX + 1];
1098 for (i = 1; i <= RTAX_MAX; i++) {
1099 if (mtb[i] &&
nla_len(mtb[i]) >=
sizeof(uint32_t)) {
1101 if (rtnl_route_set_metric(route, i, m) < 0)
1107 if (tb[RTA_MULTIPATH])
1108 if ((err = parse_multipath(route, tb[RTA_MULTIPATH])) < 0)
1111 if (tb[RTA_CACHEINFO]) {
1112 nla_memcpy(&route->rt_cacheinfo, tb[RTA_CACHEINFO],
1113 sizeof(route->rt_cacheinfo));
1114 route->ce_mask |= ROUTE_ATTR_CACHEINFO;
1118 if (!old_nh && !(old_nh = rtnl_route_nh_alloc()))
1121 rtnl_route_nh_set_ifindex(old_nh,
nla_get_u32(tb[RTA_OIF]));
1124 if (tb[RTA_GATEWAY]) {
1125 if (!old_nh && !(old_nh = rtnl_route_nh_alloc()))
1131 rtnl_route_nh_set_gateway(old_nh, addr);
1136 if (!old_nh && !(old_nh = rtnl_route_nh_alloc()))
1139 rtnl_route_nh_set_realms(old_nh,
nla_get_u32(tb[RTA_FLOW]));
1143 rtnl_route_nh_set_flags(old_nh, rtm->rtm_flags & 0xff);
1144 if (route->rt_nr_nh == 0) {
1148 rtnl_route_add_nexthop(route, old_nh);
1152 struct rtnl_nexthop *first;
1154 first = nl_list_first_entry(&route->rt_nexthops,
1155 struct rtnl_nexthop,
1160 if (rtnl_route_nh_compare(old_nh, first,
1161 old_nh->ce_mask, 0)) {
1166 rtnl_route_nh_free(old_nh);
1174 rtnl_route_put(route);
1182 int rtnl_route_build_msg(
struct nl_msg *msg,
struct rtnl_route *route)
1185 struct nlattr *metrics;
1186 struct rtmsg rtmsg = {
1187 .rtm_family = route->rt_family,
1188 .rtm_tos = route->rt_tos,
1189 .rtm_table = route->rt_table,
1190 .rtm_protocol = route->rt_protocol,
1191 .rtm_scope = route->rt_scope,
1192 .rtm_type = route->rt_type,
1193 .rtm_flags = route->rt_flags,
1196 if (route->rt_dst == NULL)
1197 return -NLE_MISSING_ATTR;
1203 if (!(route->ce_mask & ROUTE_ATTR_SCOPE))
1206 if (rtnl_route_get_nnexthops(route) == 1) {
1207 struct rtnl_nexthop *nh;
1208 nh = rtnl_route_nexthop_n(route, 0);
1209 rtmsg.rtm_flags |= nh->rtnh_flags;
1212 if (
nlmsg_append(msg, &rtmsg,
sizeof(rtmsg), NLMSG_ALIGNTO) < 0)
1213 goto nla_put_failure;
1223 if (route->ce_mask & ROUTE_ATTR_SRC)
1226 if (route->ce_mask & ROUTE_ATTR_PREF_SRC)
1229 if (route->ce_mask & ROUTE_ATTR_IIF)
1232 if (route->rt_nmetrics > 0) {
1236 if (metrics == NULL)
1237 goto nla_put_failure;
1239 for (i = 1; i <= RTAX_MAX; i++) {
1240 if (!rtnl_route_get_metric(route, i, &val))
1247 if (rtnl_route_get_nnexthops(route) == 1) {
1248 struct rtnl_nexthop *nh;
1250 nh = rtnl_route_nexthop_n(route, 0);
1251 if (nh->rtnh_gateway)
1253 if (nh->rtnh_ifindex)
1255 if (nh->rtnh_realms)
1257 }
else if (rtnl_route_get_nnexthops(route) > 1) {
1258 struct nlattr *multipath;
1259 struct rtnl_nexthop *nh;
1262 goto nla_put_failure;
1264 nl_list_for_each_entry(nh, &route->rt_nexthops, rtnh_list) {
1265 struct rtnexthop *rtnh;
1269 goto nla_put_failure;
1271 rtnh->rtnh_flags = nh->rtnh_flags;
1272 rtnh->rtnh_hops = nh->rtnh_weight;
1273 rtnh->rtnh_ifindex = nh->rtnh_ifindex;
1275 if (nh->rtnh_gateway)
1279 if (nh->rtnh_realms)
1282 rtnh->rtnh_len = nlmsg_tail(msg->nm_nlh) -
1292 return -NLE_MSGSIZE;
1296 struct nl_object_ops route_obj_ops = {
1297 .oo_name =
"route/route",
1298 .oo_size =
sizeof(
struct rtnl_route),
1299 .oo_constructor = route_constructor,
1300 .oo_free_data = route_free_data,
1301 .oo_clone = route_clone,
1307 .oo_compare = route_compare,
1308 .oo_keygen = route_keygen,
1309 .oo_update = route_update,
1310 .oo_attrs2str = route_attrs2str,
1311 .oo_id_attrs = (ROUTE_ATTR_FAMILY | ROUTE_ATTR_TOS |
1312 ROUTE_ATTR_TABLE | ROUTE_ATTR_DST |
struct nl_addr * nl_addr_clone(const struct nl_addr *addr)
Clone existing abstract address object.
Dump object briefly on one line.
struct nl_addr * nl_addr_alloc(size_t maxsize)
Allocate empty abstract address.
int nl_get_user_hz(void)
Return the value of HZ.
void nl_addr_set_prefixlen(struct nl_addr *addr, int prefixlen)
Set the prefix length of an abstract address.
int nl_addr_cmp(const struct nl_addr *a, const struct nl_addr *b)
Compare abstract addresses.
void * nlmsg_data(const struct nlmsghdr *nlh)
Return pointer to message payload.
#define NLA_PUT_ADDR(msg, attrtype, addr)
Add address attribute to netlink message.
unsigned int nl_addr_get_prefixlen(const struct nl_addr *addr)
Return prefix length of abstract address object.
struct nl_object * nl_object_alloc(struct nl_object_ops *ops)
Allocate a new object of kind specified by the operations handle.
void * nlmsg_reserve(struct nl_msg *n, size_t len, int pad)
Reserve room for additional data in a netlink message.
Attribute validation policy.
struct nl_cache * nl_cache_mngt_require_safe(const char *name)
Return cache previously provided via nl_cache_mngt_provide()
void nl_object_get(struct nl_object *obj)
Acquire a reference on a object.
uint32_t nla_get_u32(const struct nlattr *nla)
Return payload of 32 bit integer attribute.
int nlmsg_parse(struct nlmsghdr *nlh, int hdrlen, struct nlattr *tb[], int maxtype, struct nla_policy *policy)
parse attributes of a netlink message
struct nl_addr * nl_addr_get(struct nl_addr *addr)
Increase the reference counter of an abstract address.
void nl_addr_set_family(struct nl_addr *addr, int family)
Set address family.
struct nl_addr * nl_addr_alloc_attr(const struct nlattr *nla, int family)
Allocate abstract address based on Netlink attribute.
Dump all attributes but no statistics.
int nla_nest_end(struct nl_msg *msg, struct nlattr *start)
Finalize nesting of attributes.
int nla_memcpy(void *dest, const struct nlattr *src, int count)
Copy attribute payload to another memory area.
int nla_parse_nested(struct nlattr *tb[], int maxtype, struct nlattr *nla, struct nla_policy *policy)
Create attribute index based on nested attribute.
void * nla_data(const struct nlattr *nla)
Return pointer to the payload section.
#define NLA_PUT_U32(msg, attrtype, value)
Add 32 bit integer attribute to netlink message.
int nla_len(const struct nlattr *nla)
Return length of the payload .
int nla_parse(struct nlattr *tb[], int maxtype, struct nlattr *head, int len, struct nla_policy *policy)
Create attribute index based on a stream of attributes.
int rtnl_route_guess_scope(struct rtnl_route *route)
Guess scope of a route object.
int nlmsg_append(struct nl_msg *n, void *data, size_t len, int pad)
Append data to tail of a netlink message.
void nl_object_put(struct nl_object *obj)
Release a reference from an object.
void nl_addr_put(struct nl_addr *addr)
Decrease the reference counter of an abstract address.
uint16_t type
Type of attribute or NLA_UNSPEC.
char * rtnl_link_i2name(struct nl_cache *cache, int ifindex, char *dst, size_t len)
Translate interface index to corresponding link name.
void nl_dump(struct nl_dump_params *params, const char *fmt,...)
Dump a formatted character string.
unsigned int nl_addr_get_len(const struct nl_addr *addr)
Get length of binary address of abstract address object.
int dp_ivar
PRIVATE Owned by the current caller.
Dump all attributes including statistics.
void * nl_addr_get_binary_addr(const struct nl_addr *addr)
Get binary address of abstract address object.
struct nlattr * nla_nest_start(struct nl_msg *msg, int attrtype)
Start a new level of nested attributes.
char * nl_addr2str(const struct nl_addr *addr, char *buf, size_t size)
Convert abstract address object to character string.