33 #include <netlink-private/netlink.h> 34 #include <netlink/netlink.h> 35 #include <netlink/cache.h> 36 #include <netlink/utils.h> 37 #include <netlink/data.h> 38 #include <netlink/hashtable.h> 39 #include <netlink/route/rtnl.h> 40 #include <netlink/route/route.h> 41 #include <netlink/route/link.h> 42 #include <netlink/route/nexthop.h> 45 #define ROUTE_ATTR_FAMILY 0x000001 46 #define ROUTE_ATTR_TOS 0x000002 47 #define ROUTE_ATTR_TABLE 0x000004 48 #define ROUTE_ATTR_PROTOCOL 0x000008 49 #define ROUTE_ATTR_SCOPE 0x000010 50 #define ROUTE_ATTR_TYPE 0x000020 51 #define ROUTE_ATTR_FLAGS 0x000040 52 #define ROUTE_ATTR_DST 0x000080 53 #define ROUTE_ATTR_SRC 0x000100 54 #define ROUTE_ATTR_IIF 0x000200 55 #define ROUTE_ATTR_OIF 0x000400 56 #define ROUTE_ATTR_GATEWAY 0x000800 57 #define ROUTE_ATTR_PRIO 0x001000 58 #define ROUTE_ATTR_PREF_SRC 0x002000 59 #define ROUTE_ATTR_METRICS 0x004000 60 #define ROUTE_ATTR_MULTIPATH 0x008000 61 #define ROUTE_ATTR_REALMS 0x010000 62 #define ROUTE_ATTR_CACHEINFO 0x020000 65 static void route_constructor(
struct nl_object *c)
67 struct rtnl_route *r = (
struct rtnl_route *) c;
69 r->rt_family = AF_UNSPEC;
70 r->rt_scope = RT_SCOPE_NOWHERE;
71 r->rt_table = RT_TABLE_MAIN;
72 r->rt_protocol = RTPROT_STATIC;
73 r->rt_type = RTN_UNICAST;
76 nl_init_list_head(&r->rt_nexthops);
79 static void route_free_data(
struct nl_object *c)
81 struct rtnl_route *r = (
struct rtnl_route *) c;
82 struct rtnl_nexthop *nh, *tmp;
91 nl_list_for_each_entry_safe(nh, tmp, &r->rt_nexthops, rtnh_list) {
92 rtnl_route_remove_nexthop(r, nh);
93 rtnl_route_nh_free(nh);
97 static int route_clone(
struct nl_object *_dst,
struct nl_object *_src)
99 struct rtnl_route *dst = (
struct rtnl_route *) _dst;
100 struct rtnl_route *src = (
struct rtnl_route *) _src;
101 struct rtnl_nexthop *nh, *
new;
111 if (src->rt_pref_src)
118 nl_init_list_head(&dst->rt_nexthops);
119 nl_list_for_each_entry(nh, &src->rt_nexthops, rtnh_list) {
120 new = rtnl_route_nh_clone(nh);
124 rtnl_route_add_nexthop(dst,
new);
130 static void route_dump_line(
struct nl_object *a,
struct nl_dump_params *p)
132 struct rtnl_route *r = (
struct rtnl_route *) a;
133 int cache = 0, flags;
136 if (r->rt_flags & RTM_F_CLONED)
139 nl_dump_line(p,
"%s ", nl_af2str(r->rt_family, buf,
sizeof(buf)));
144 if (!(r->ce_mask & ROUTE_ATTR_DST) ||
150 if (r->ce_mask & ROUTE_ATTR_TABLE && !cache)
152 rtnl_route_table2str(r->rt_table, buf,
sizeof(buf)));
154 if (r->ce_mask & ROUTE_ATTR_TYPE)
156 nl_rtntype2str(r->rt_type, buf,
sizeof(buf)));
158 if (r->ce_mask & ROUTE_ATTR_TOS && r->rt_tos != 0)
159 nl_dump(p,
"tos %#x ", r->rt_tos);
161 if (r->ce_mask & ROUTE_ATTR_MULTIPATH) {
162 struct rtnl_nexthop *nh;
164 nl_list_for_each_entry(nh, &r->rt_nexthops, rtnh_list) {
165 p->
dp_ivar = NH_DUMP_FROM_ONELINE;
166 rtnl_route_nh_dump(nh, p);
170 flags = r->rt_flags & ~(RTM_F_CLONED);
171 if (r->ce_mask & ROUTE_ATTR_FLAGS && flags) {
175 #define PRINT_FLAG(f) if (flags & RTNH_F_##f) { \ 176 flags &= ~RTNH_F_##f; nl_dump(p, #f "%s", flags ? "," : ""); } 179 PRINT_FLAG(PERVASIVE);
182 #define PRINT_FLAG(f) if (flags & RTM_F_##f) { \ 183 flags &= ~RTM_F_##f; nl_dump(p, #f "%s", flags ? "," : ""); } 185 PRINT_FLAG(EQUALIZE);
189 #define PRINT_FLAG(f) if (flags & RTCF_##f) { \ 190 flags &= ~RTCF_##f; nl_dump(p, #f "%s", flags ? "," : ""); } 192 PRINT_FLAG(REDIRECTED);
193 PRINT_FLAG(DOREDIRECT);
194 PRINT_FLAG(DIRECTSRC);
196 PRINT_FLAG(BROADCAST);
197 PRINT_FLAG(MULTICAST);
207 static void route_dump_details(
struct nl_object *a,
struct nl_dump_params *p)
209 struct rtnl_route *r = (
struct rtnl_route *) a;
210 struct nl_cache *link_cache;
216 route_dump_line(a, p);
217 nl_dump_line(p,
" ");
219 if (r->ce_mask & ROUTE_ATTR_PREF_SRC)
220 nl_dump(p,
"preferred-src %s ",
223 if (r->ce_mask & ROUTE_ATTR_SCOPE && r->rt_scope != RT_SCOPE_NOWHERE)
225 rtnl_scope2str(r->rt_scope, buf,
sizeof(buf)));
227 if (r->ce_mask & ROUTE_ATTR_PRIO)
228 nl_dump(p,
"priority %#x ", r->rt_prio);
230 if (r->ce_mask & ROUTE_ATTR_PROTOCOL)
232 rtnl_route_proto2str(r->rt_protocol, buf,
sizeof(buf)));
234 if (r->ce_mask & ROUTE_ATTR_IIF) {
240 nl_dump(p,
"iif %d ", r->rt_iif);
243 if (r->ce_mask & ROUTE_ATTR_SRC)
248 if (r->ce_mask & ROUTE_ATTR_MULTIPATH) {
249 struct rtnl_nexthop *nh;
251 nl_list_for_each_entry(nh, &r->rt_nexthops, rtnh_list) {
252 nl_dump_line(p,
" ");
253 p->
dp_ivar = NH_DUMP_FROM_DETAILS;
254 rtnl_route_nh_dump(nh, p);
259 if ((r->ce_mask & ROUTE_ATTR_CACHEINFO) && r->rt_cacheinfo.rtci_error) {
260 nl_dump_line(p,
" cacheinfo error %d (%s)\n",
261 r->rt_cacheinfo.rtci_error,
262 strerror_r(-r->rt_cacheinfo.rtci_error, buf,
sizeof(buf)));
265 if (r->ce_mask & ROUTE_ATTR_METRICS) {
266 nl_dump_line(p,
" metrics [");
267 for (i = 0; i < RTAX_MAX; i++)
268 if (r->rt_metrics_mask & (1 << i))
270 rtnl_route_metric2str(i+1,
277 nl_cache_put(link_cache);
280 static void route_dump_stats(
struct nl_object *obj,
struct nl_dump_params *p)
282 struct rtnl_route *route = (
struct rtnl_route *) obj;
284 route_dump_details(obj, p);
286 if (route->ce_mask & ROUTE_ATTR_CACHEINFO) {
289 nl_dump_line(p,
" used %u refcnt %u last-use %us " 291 ci->rtci_used, ci->rtci_clntref,
297 static void route_keygen(
struct nl_object *obj, uint32_t *hashkey,
300 struct rtnl_route *route = (
struct rtnl_route *) obj;
301 unsigned int rkey_sz;
302 struct nl_addr *addr = NULL;
303 struct route_hash_key {
309 } __attribute__((packed)) *rkey;
311 char buf[INET6_ADDRSTRLEN+5];
315 addr = route->rt_dst;
317 rkey_sz =
sizeof(*rkey);
320 rkey = calloc(1, rkey_sz);
322 NL_DBG(2,
"Warning: calloc failed for %d bytes...\n", rkey_sz);
326 rkey->rt_family = route->rt_family;
327 rkey->rt_tos = route->rt_tos;
328 rkey->rt_table = route->rt_table;
329 rkey->rt_prio = route->rt_prio;
334 *hashkey = nl_hash(rkey, rkey_sz, 0) % table_sz;
336 NL_DBG(5,
"route %p key (fam %d tos %d table %d addr %s) keysz %d " 337 "hash 0x%x\n", route, rkey->rt_family, rkey->rt_tos,
338 rkey->rt_table,
nl_addr2str(addr, buf,
sizeof(buf)),
346 static uint64_t route_compare(
struct nl_object *_a,
struct nl_object *_b,
347 uint64_t attrs,
int flags)
349 struct rtnl_route *a = (
struct rtnl_route *) _a;
350 struct rtnl_route *b = (
struct rtnl_route *) _b;
351 struct rtnl_nexthop *nh_a, *nh_b;
355 #define ROUTE_DIFF(ATTR, EXPR) ATTR_DIFF(attrs, ROUTE_ATTR_##ATTR, a, b, EXPR) 357 diff |= ROUTE_DIFF(FAMILY, a->rt_family != b->rt_family);
358 diff |= ROUTE_DIFF(TOS, a->rt_tos != b->rt_tos);
359 diff |= ROUTE_DIFF(TABLE, a->rt_table != b->rt_table);
360 diff |= ROUTE_DIFF(PROTOCOL, a->rt_protocol != b->rt_protocol);
361 diff |= ROUTE_DIFF(SCOPE, a->rt_scope != b->rt_scope);
362 diff |= ROUTE_DIFF(TYPE, a->rt_type != b->rt_type);
363 diff |= ROUTE_DIFF(PRIO, a->rt_prio != b->rt_prio);
364 diff |= ROUTE_DIFF(DST,
nl_addr_cmp(a->rt_dst, b->rt_dst));
365 diff |= ROUTE_DIFF(SRC,
nl_addr_cmp(a->rt_src, b->rt_src));
366 diff |= ROUTE_DIFF(IIF, a->rt_iif != b->rt_iif);
367 diff |= ROUTE_DIFF(PREF_SRC,
nl_addr_cmp(a->rt_pref_src,
370 if (flags & LOOSE_COMPARISON) {
371 nl_list_for_each_entry(nh_b, &b->rt_nexthops, rtnh_list) {
373 nl_list_for_each_entry(nh_a, &a->rt_nexthops,
375 if (!rtnl_route_nh_compare(nh_a, nh_b,
386 for (i = 0; i < RTAX_MAX - 1; i++) {
387 if (a->rt_metrics_mask & (1 << i) &&
388 (!(b->rt_metrics_mask & (1 << i)) ||
389 a->rt_metrics[i] != b->rt_metrics[i]))
390 diff |= ROUTE_DIFF(METRICS, 1);
393 diff |= ROUTE_DIFF(FLAGS,
394 (a->rt_flags ^ b->rt_flags) & b->rt_flag_mask);
396 if (a->rt_nr_nh != b->rt_nr_nh)
400 nl_list_for_each_entry(nh_a, &a->rt_nexthops, rtnh_list) {
402 nl_list_for_each_entry(nh_b, &b->rt_nexthops,
404 if (!rtnl_route_nh_compare(nh_a, nh_b, ~0, 0)) {
415 nl_list_for_each_entry(nh_b, &b->rt_nexthops, rtnh_list) {
417 nl_list_for_each_entry(nh_a, &a->rt_nexthops,
419 if (!rtnl_route_nh_compare(nh_a, nh_b, ~0, 0)) {
428 for (i = 0; i < RTAX_MAX - 1; i++) {
429 if ((a->rt_metrics_mask & (1 << i)) ^
430 (b->rt_metrics_mask & (1 << i)))
431 diff |= ROUTE_DIFF(METRICS, 1);
433 diff |= ROUTE_DIFF(METRICS,
434 a->rt_metrics[i] != b->rt_metrics[i]);
437 diff |= ROUTE_DIFF(FLAGS, a->rt_flags != b->rt_flags);
444 diff |= ROUTE_DIFF(MULTIPATH, 1);
450 static int route_update(
struct nl_object *old_obj,
struct nl_object *new_obj)
452 struct rtnl_route *new_route = (
struct rtnl_route *) new_obj;
453 struct rtnl_route *old_route = (
struct rtnl_route *) old_obj;
454 struct rtnl_nexthop *new_nh;
455 int action = new_obj->ce_msgtype;
457 char buf[INET6_ADDRSTRLEN+5];
467 if (new_route->rt_family != AF_INET6 ||
468 new_route->rt_table == RT_TABLE_LOCAL)
469 return -NLE_OPNOTSUPP;
475 if (rtnl_route_get_nnexthops(new_route) != 1)
476 return -NLE_OPNOTSUPP;
483 new_nh = rtnl_route_nexthop_n(new_route, 0);
484 if (!new_nh || !rtnl_route_nh_get_gateway(new_nh))
485 return -NLE_OPNOTSUPP;
488 case RTM_NEWROUTE : {
489 struct rtnl_nexthop *cloned_nh;
494 cloned_nh = rtnl_route_nh_clone(new_nh);
497 rtnl_route_add_nexthop(old_route, cloned_nh);
499 NL_DBG(2,
"Route obj %p updated. Added " 500 "nexthop %p via %s\n", old_route, cloned_nh,
505 case RTM_DELROUTE : {
506 struct rtnl_nexthop *old_nh;
514 if (rtnl_route_get_nnexthops(old_route) <= 1)
515 return -NLE_OPNOTSUPP;
520 nl_list_for_each_entry(old_nh, &old_route->rt_nexthops,
522 if (!rtnl_route_nh_compare(old_nh, new_nh, ~0, 0)) {
524 rtnl_route_remove_nexthop(old_route, old_nh);
526 NL_DBG(2,
"Route obj %p updated. Removed " 527 "nexthop %p via %s\n", old_route,
532 rtnl_route_nh_free(old_nh);
539 NL_DBG(2,
"Unknown action associated " 540 "to object %p during route update\n", new_obj);
541 return -NLE_OPNOTSUPP;
547 static const struct trans_tbl route_attrs[] = {
548 __ADD(ROUTE_ATTR_FAMILY, family),
549 __ADD(ROUTE_ATTR_TOS, tos),
550 __ADD(ROUTE_ATTR_TABLE, table),
551 __ADD(ROUTE_ATTR_PROTOCOL, protocol),
552 __ADD(ROUTE_ATTR_SCOPE, scope),
553 __ADD(ROUTE_ATTR_TYPE, type),
554 __ADD(ROUTE_ATTR_FLAGS, flags),
555 __ADD(ROUTE_ATTR_DST, dst),
556 __ADD(ROUTE_ATTR_SRC, src),
557 __ADD(ROUTE_ATTR_IIF, iif),
558 __ADD(ROUTE_ATTR_OIF, oif),
559 __ADD(ROUTE_ATTR_GATEWAY, gateway),
560 __ADD(ROUTE_ATTR_PRIO, prio),
561 __ADD(ROUTE_ATTR_PREF_SRC, pref_src),
562 __ADD(ROUTE_ATTR_METRICS, metrics),
563 __ADD(ROUTE_ATTR_MULTIPATH, multipath),
564 __ADD(ROUTE_ATTR_REALMS, realms),
565 __ADD(ROUTE_ATTR_CACHEINFO, cacheinfo),
568 static char *route_attrs2str(
int attrs,
char *buf,
size_t len)
570 return __flags2str(attrs, buf, len, route_attrs,
571 ARRAY_SIZE(route_attrs));
579 struct rtnl_route *rtnl_route_alloc(
void)
584 void rtnl_route_get(
struct rtnl_route *route)
589 void rtnl_route_put(
struct rtnl_route *route)
601 void rtnl_route_set_table(
struct rtnl_route *route, uint32_t table)
603 route->rt_table = table;
604 route->ce_mask |= ROUTE_ATTR_TABLE;
607 uint32_t rtnl_route_get_table(
struct rtnl_route *route)
609 return route->rt_table;
612 void rtnl_route_set_scope(
struct rtnl_route *route, uint8_t scope)
614 route->rt_scope = scope;
615 route->ce_mask |= ROUTE_ATTR_SCOPE;
618 uint8_t rtnl_route_get_scope(
struct rtnl_route *route)
620 return route->rt_scope;
623 void rtnl_route_set_tos(
struct rtnl_route *route, uint8_t tos)
626 route->ce_mask |= ROUTE_ATTR_TOS;
629 uint8_t rtnl_route_get_tos(
struct rtnl_route *route)
631 return route->rt_tos;
634 void rtnl_route_set_protocol(
struct rtnl_route *route, uint8_t protocol)
636 route->rt_protocol = protocol;
637 route->ce_mask |= ROUTE_ATTR_PROTOCOL;
640 uint8_t rtnl_route_get_protocol(
struct rtnl_route *route)
642 return route->rt_protocol;
645 void rtnl_route_set_priority(
struct rtnl_route *route, uint32_t prio)
647 route->rt_prio = prio;
648 route->ce_mask |= ROUTE_ATTR_PRIO;
651 uint32_t rtnl_route_get_priority(
struct rtnl_route *route)
653 return route->rt_prio;
656 int rtnl_route_set_family(
struct rtnl_route *route, uint8_t family)
658 if (family != AF_INET && family != AF_INET6 && family != AF_DECnet)
659 return -NLE_AF_NOSUPPORT;
661 route->rt_family = family;
662 route->ce_mask |= ROUTE_ATTR_FAMILY;
667 uint8_t rtnl_route_get_family(
struct rtnl_route *route)
669 return route->rt_family;
672 int rtnl_route_set_dst(
struct rtnl_route *route,
struct nl_addr *addr)
674 if (route->ce_mask & ROUTE_ATTR_FAMILY) {
675 if (addr->a_family != route->rt_family)
676 return -NLE_AF_MISMATCH;
678 route->rt_family = addr->a_family;
684 route->rt_dst = addr;
686 route->ce_mask |= (ROUTE_ATTR_DST | ROUTE_ATTR_FAMILY);
691 struct nl_addr *rtnl_route_get_dst(
struct rtnl_route *route)
693 return route->rt_dst;
696 int rtnl_route_set_src(
struct rtnl_route *route,
struct nl_addr *addr)
698 if (addr->a_family == AF_INET)
699 return -NLE_SRCRT_NOSUPPORT;
701 if (route->ce_mask & ROUTE_ATTR_FAMILY) {
702 if (addr->a_family != route->rt_family)
703 return -NLE_AF_MISMATCH;
705 route->rt_family = addr->a_family;
711 route->rt_src = addr;
712 route->ce_mask |= (ROUTE_ATTR_SRC | ROUTE_ATTR_FAMILY);
717 struct nl_addr *rtnl_route_get_src(
struct rtnl_route *route)
719 return route->rt_src;
722 int rtnl_route_set_type(
struct rtnl_route *route, uint8_t type)
727 route->rt_type = type;
728 route->ce_mask |= ROUTE_ATTR_TYPE;
733 uint8_t rtnl_route_get_type(
struct rtnl_route *route)
735 return route->rt_type;
738 void rtnl_route_set_flags(
struct rtnl_route *route, uint32_t flags)
740 route->rt_flag_mask |= flags;
741 route->rt_flags |= flags;
742 route->ce_mask |= ROUTE_ATTR_FLAGS;
745 void rtnl_route_unset_flags(
struct rtnl_route *route, uint32_t flags)
747 route->rt_flag_mask |= flags;
748 route->rt_flags &= ~flags;
749 route->ce_mask |= ROUTE_ATTR_FLAGS;
752 uint32_t rtnl_route_get_flags(
struct rtnl_route *route)
754 return route->rt_flags;
757 int rtnl_route_set_metric(
struct rtnl_route *route,
int metric, uint32_t value)
759 if (metric > RTAX_MAX || metric < 1)
762 route->rt_metrics[metric - 1] = value;
764 if (!(route->rt_metrics_mask & (1 << (metric - 1)))) {
765 route->rt_nmetrics++;
766 route->rt_metrics_mask |= (1 << (metric - 1));
769 route->ce_mask |= ROUTE_ATTR_METRICS;
774 int rtnl_route_unset_metric(
struct rtnl_route *route,
int metric)
776 if (metric > RTAX_MAX || metric < 1)
779 if (route->rt_metrics_mask & (1 << (metric - 1))) {
780 route->rt_nmetrics--;
781 route->rt_metrics_mask &= ~(1 << (metric - 1));
787 int rtnl_route_get_metric(
struct rtnl_route *route,
int metric, uint32_t *value)
789 if (metric > RTAX_MAX || metric < 1)
792 if (!(route->rt_metrics_mask & (1 << (metric - 1))))
793 return -NLE_OBJ_NOTFOUND;
796 *value = route->rt_metrics[metric - 1];
801 int rtnl_route_set_pref_src(
struct rtnl_route *route,
struct nl_addr *addr)
803 if (route->ce_mask & ROUTE_ATTR_FAMILY) {
804 if (addr->a_family != route->rt_family)
805 return -NLE_AF_MISMATCH;
807 route->rt_family = addr->a_family;
809 if (route->rt_pref_src)
813 route->rt_pref_src = addr;
814 route->ce_mask |= (ROUTE_ATTR_PREF_SRC | ROUTE_ATTR_FAMILY);
819 struct nl_addr *rtnl_route_get_pref_src(
struct rtnl_route *route)
821 return route->rt_pref_src;
824 void rtnl_route_set_iif(
struct rtnl_route *route,
int ifindex)
826 route->rt_iif = ifindex;
827 route->ce_mask |= ROUTE_ATTR_IIF;
830 int rtnl_route_get_iif(
struct rtnl_route *route)
832 return route->rt_iif;
835 void rtnl_route_add_nexthop(
struct rtnl_route *route,
struct rtnl_nexthop *nh)
837 nl_list_add_tail(&nh->rtnh_list, &route->rt_nexthops);
839 route->ce_mask |= ROUTE_ATTR_MULTIPATH;
842 void rtnl_route_remove_nexthop(
struct rtnl_route *route,
struct rtnl_nexthop *nh)
844 if (route->ce_mask & ROUTE_ATTR_MULTIPATH) {
846 nl_list_del(&nh->rtnh_list);
850 struct nl_list_head *rtnl_route_get_nexthops(
struct rtnl_route *route)
852 if (route->ce_mask & ROUTE_ATTR_MULTIPATH)
853 return &route->rt_nexthops;
858 int rtnl_route_get_nnexthops(
struct rtnl_route *route)
860 if (route->ce_mask & ROUTE_ATTR_MULTIPATH)
861 return route->rt_nr_nh;
866 void rtnl_route_foreach_nexthop(
struct rtnl_route *r,
867 void (*cb)(
struct rtnl_nexthop *,
void *),
870 struct rtnl_nexthop *nh;
872 if (r->ce_mask & ROUTE_ATTR_MULTIPATH) {
873 nl_list_for_each_entry(nh, &r->rt_nexthops, rtnh_list) {
879 struct rtnl_nexthop *rtnl_route_nexthop_n(
struct rtnl_route *r,
int n)
881 struct rtnl_nexthop *nh;
884 if (r->ce_mask & ROUTE_ATTR_MULTIPATH && r->rt_nr_nh > n) {
886 nl_list_for_each_entry(nh, &r->rt_nexthops, rtnh_list) {
887 if (i == n)
return nh;
916 if (route->rt_type == RTN_LOCAL)
917 return RT_SCOPE_HOST;
919 if (!nl_list_empty(&route->rt_nexthops)) {
920 struct rtnl_nexthop *nh;
926 nl_list_for_each_entry(nh, &route->rt_nexthops, rtnh_list) {
927 if (nh->rtnh_gateway)
928 return RT_SCOPE_UNIVERSE;
932 return RT_SCOPE_LINK;
937 static struct nla_policy route_policy[RTA_MAX+1] = {
939 [RTA_OIF] = { .type =
NLA_U32 },
940 [RTA_PRIORITY] = { .type =
NLA_U32 },
941 [RTA_FLOW] = { .type =
NLA_U32 },
942 [RTA_CACHEINFO] = { .minlen =
sizeof(
struct rta_cacheinfo) },
947 static int parse_multipath(
struct rtnl_route *route,
struct nlattr *attr)
949 struct rtnl_nexthop *nh = NULL;
950 struct rtnexthop *rtnh =
nla_data(attr);
954 while (tlen >=
sizeof(*rtnh) && tlen >= rtnh->rtnh_len) {
955 nh = rtnl_route_nh_alloc();
959 rtnl_route_nh_set_weight(nh, rtnh->rtnh_hops);
960 rtnl_route_nh_set_ifindex(nh, rtnh->rtnh_ifindex);
961 rtnl_route_nh_set_flags(nh, rtnh->rtnh_flags);
963 if (rtnh->rtnh_len >
sizeof(*rtnh)) {
964 struct nlattr *ntb[RTA_MAX + 1];
966 err =
nla_parse(ntb, RTA_MAX, (
struct nlattr *)
968 rtnh->rtnh_len -
sizeof(*rtnh),
973 if (ntb[RTA_GATEWAY]) {
974 struct nl_addr *addr;
983 rtnl_route_nh_set_gateway(nh, addr);
991 rtnl_route_nh_set_realms(nh, realms);
995 rtnl_route_add_nexthop(route, nh);
996 tlen -= RTNH_ALIGN(rtnh->rtnh_len);
997 rtnh = RTNH_NEXT(rtnh);
1003 rtnl_route_nh_free(nh);
1008 int rtnl_route_parse(
struct nlmsghdr *nlh,
struct rtnl_route **result)
1011 struct rtnl_route *route;
1012 struct nlattr *tb[RTA_MAX + 1];
1013 struct nl_addr *src = NULL, *dst = NULL, *addr;
1014 struct rtnl_nexthop *old_nh = NULL;
1017 route = rtnl_route_alloc();
1023 route->ce_msgtype = nlh->nlmsg_type;
1025 err =
nlmsg_parse(nlh,
sizeof(
struct rtmsg), tb, RTA_MAX, route_policy);
1030 route->rt_family = family = rtm->rtm_family;
1031 route->rt_tos = rtm->rtm_tos;
1032 route->rt_table = rtm->rtm_table;
1033 route->rt_type = rtm->rtm_type;
1034 route->rt_scope = rtm->rtm_scope;
1035 route->rt_protocol = rtm->rtm_protocol;
1036 route->rt_flags = rtm->rtm_flags;
1039 route->ce_mask |= ROUTE_ATTR_FAMILY | ROUTE_ATTR_TOS |
1040 ROUTE_ATTR_TABLE | ROUTE_ATTR_TYPE |
1041 ROUTE_ATTR_SCOPE | ROUTE_ATTR_PROTOCOL |
1042 ROUTE_ATTR_FLAGS | ROUTE_ATTR_PRIO;
1054 err = rtnl_route_set_dst(route, dst);
1063 }
else if (rtm->rtm_src_len)
1069 rtnl_route_set_src(route, src);
1074 rtnl_route_set_table(route,
nla_get_u32(tb[RTA_TABLE]));
1077 rtnl_route_set_iif(route,
nla_get_u32(tb[RTA_IIF]));
1079 if (tb[RTA_PRIORITY])
1080 rtnl_route_set_priority(route,
nla_get_u32(tb[RTA_PRIORITY]));
1082 if (tb[RTA_PREFSRC]) {
1085 rtnl_route_set_pref_src(route, addr);
1089 if (tb[RTA_METRICS]) {
1090 struct nlattr *mtb[RTAX_MAX + 1];
1097 for (i = 1; i <= RTAX_MAX; i++) {
1098 if (mtb[i] &&
nla_len(mtb[i]) >=
sizeof(uint32_t)) {
1100 if (rtnl_route_set_metric(route, i, m) < 0)
1106 if (tb[RTA_MULTIPATH])
1107 if ((err = parse_multipath(route, tb[RTA_MULTIPATH])) < 0)
1110 if (tb[RTA_CACHEINFO]) {
1111 nla_memcpy(&route->rt_cacheinfo, tb[RTA_CACHEINFO],
1112 sizeof(route->rt_cacheinfo));
1113 route->ce_mask |= ROUTE_ATTR_CACHEINFO;
1117 if (!old_nh && !(old_nh = rtnl_route_nh_alloc()))
1120 rtnl_route_nh_set_ifindex(old_nh,
nla_get_u32(tb[RTA_OIF]));
1123 if (tb[RTA_GATEWAY]) {
1124 if (!old_nh && !(old_nh = rtnl_route_nh_alloc()))
1130 rtnl_route_nh_set_gateway(old_nh, addr);
1135 if (!old_nh && !(old_nh = rtnl_route_nh_alloc()))
1138 rtnl_route_nh_set_realms(old_nh,
nla_get_u32(tb[RTA_FLOW]));
1142 rtnl_route_nh_set_flags(old_nh, rtm->rtm_flags & 0xff);
1143 if (route->rt_nr_nh == 0) {
1147 rtnl_route_add_nexthop(route, old_nh);
1151 struct rtnl_nexthop *first;
1153 first = nl_list_first_entry(&route->rt_nexthops,
1154 struct rtnl_nexthop,
1159 if (rtnl_route_nh_compare(old_nh, first,
1160 old_nh->ce_mask, 0)) {
1165 rtnl_route_nh_free(old_nh);
1173 rtnl_route_put(route);
1181 int rtnl_route_build_msg(
struct nl_msg *msg,
struct rtnl_route *route)
1184 struct nlattr *metrics;
1185 struct rtmsg rtmsg = {
1186 .rtm_family = route->rt_family,
1187 .rtm_tos = route->rt_tos,
1188 .rtm_table = route->rt_table,
1189 .rtm_protocol = route->rt_protocol,
1190 .rtm_scope = route->rt_scope,
1191 .rtm_type = route->rt_type,
1192 .rtm_flags = route->rt_flags,
1195 if (route->rt_dst == NULL)
1196 return -NLE_MISSING_ATTR;
1202 if (!(route->ce_mask & ROUTE_ATTR_SCOPE))
1205 if (rtnl_route_get_nnexthops(route) == 1) {
1206 struct rtnl_nexthop *nh;
1207 nh = rtnl_route_nexthop_n(route, 0);
1208 rtmsg.rtm_flags |= nh->rtnh_flags;
1211 if (
nlmsg_append(msg, &rtmsg,
sizeof(rtmsg), NLMSG_ALIGNTO) < 0)
1212 goto nla_put_failure;
1222 if (route->ce_mask & ROUTE_ATTR_SRC)
1225 if (route->ce_mask & ROUTE_ATTR_PREF_SRC)
1228 if (route->ce_mask & ROUTE_ATTR_IIF)
1231 if (route->rt_nmetrics > 0) {
1235 if (metrics == NULL)
1236 goto nla_put_failure;
1238 for (i = 1; i <= RTAX_MAX; i++) {
1239 if (!rtnl_route_get_metric(route, i, &val))
1246 if (rtnl_route_get_nnexthops(route) == 1) {
1247 struct rtnl_nexthop *nh;
1249 nh = rtnl_route_nexthop_n(route, 0);
1250 if (nh->rtnh_gateway)
1252 if (nh->rtnh_ifindex)
1254 if (nh->rtnh_realms)
1256 }
else if (rtnl_route_get_nnexthops(route) > 1) {
1257 struct nlattr *multipath;
1258 struct rtnl_nexthop *nh;
1261 goto nla_put_failure;
1263 nl_list_for_each_entry(nh, &route->rt_nexthops, rtnh_list) {
1264 struct rtnexthop *rtnh;
1268 goto nla_put_failure;
1270 rtnh->rtnh_flags = nh->rtnh_flags;
1271 rtnh->rtnh_hops = nh->rtnh_weight;
1272 rtnh->rtnh_ifindex = nh->rtnh_ifindex;
1274 if (nh->rtnh_gateway)
1278 if (nh->rtnh_realms)
1281 rtnh->rtnh_len = nlmsg_tail(msg->nm_nlh) -
1291 return -NLE_MSGSIZE;
1295 struct nl_object_ops route_obj_ops = {
1296 .oo_name =
"route/route",
1297 .oo_size =
sizeof(
struct rtnl_route),
1298 .oo_constructor = route_constructor,
1299 .oo_free_data = route_free_data,
1300 .oo_clone = route_clone,
1306 .oo_compare = route_compare,
1307 .oo_keygen = route_keygen,
1308 .oo_update = route_update,
1309 .oo_attrs2str = route_attrs2str,
1310 .oo_id_attrs = (ROUTE_ATTR_FAMILY | ROUTE_ATTR_TOS |
1311 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.