151 #include <netlink-local.h>
152 #include <netlink/netlink.h>
153 #include <netlink/utils.h>
154 #include <netlink/route/rtnl.h>
155 #include <netlink/route/neighbour.h>
156 #include <netlink/route/link.h>
159 #define NEIGH_ATTR_FLAGS 0x01
160 #define NEIGH_ATTR_STATE 0x02
161 #define NEIGH_ATTR_LLADDR 0x04
162 #define NEIGH_ATTR_DST 0x08
163 #define NEIGH_ATTR_CACHEINFO 0x10
164 #define NEIGH_ATTR_IFINDEX 0x20
165 #define NEIGH_ATTR_FAMILY 0x40
166 #define NEIGH_ATTR_TYPE 0x80
167 #define NEIGH_ATTR_PROBES 0x100
173 static void neigh_free_data(
struct nl_object *c)
175 struct rtnl_neigh *neigh = nl_object_priv(c);
180 nl_addr_put(neigh->n_lladdr);
181 nl_addr_put(neigh->n_dst);
186 struct rtnl_neigh *dst = nl_object_priv(_dst);
187 struct rtnl_neigh *src = nl_object_priv(_src);
201 uint32_t attrs,
int flags)
203 struct rtnl_neigh *a = (
struct rtnl_neigh *) _a;
204 struct rtnl_neigh *b = (
struct rtnl_neigh *) _b;
207 #define NEIGH_DIFF(ATTR, EXPR) ATTR_DIFF(attrs, NEIGH_ATTR_##ATTR, a, b, EXPR)
209 diff |= NEIGH_DIFF(IFINDEX, a->n_ifindex != b->n_ifindex);
210 diff |= NEIGH_DIFF(FAMILY, a->n_family != b->n_family);
211 diff |= NEIGH_DIFF(TYPE, a->n_type != b->n_type);
212 diff |= NEIGH_DIFF(LLADDR,
nl_addr_cmp(a->n_lladdr, b->n_lladdr));
213 diff |= NEIGH_DIFF(DST,
nl_addr_cmp(a->n_dst, b->n_dst));
215 if (flags & LOOSE_COMPARISON) {
216 diff |= NEIGH_DIFF(STATE,
217 (a->n_state ^ b->n_state) & b->n_state_mask);
218 diff |= NEIGH_DIFF(FLAGS,
219 (a->n_flags ^ b->n_flags) & b->n_flag_mask);
221 diff |= NEIGH_DIFF(STATE, a->n_state != b->n_state);
222 diff |= NEIGH_DIFF(FLAGS, a->n_flags != b->n_flags);
230 static const struct trans_tbl neigh_attrs[] = {
231 __ADD(NEIGH_ATTR_FLAGS, flags)
232 __ADD(NEIGH_ATTR_STATE, state)
233 __ADD(NEIGH_ATTR_LLADDR, lladdr)
234 __ADD(NEIGH_ATTR_DST, dst)
235 __ADD(NEIGH_ATTR_CACHEINFO, cacheinfo)
236 __ADD(NEIGH_ATTR_IFINDEX, ifindex)
237 __ADD(NEIGH_ATTR_FAMILY, family)
238 __ADD(NEIGH_ATTR_TYPE, type)
239 __ADD(NEIGH_ATTR_PROBES, probes)
242 static
char *neigh_attrs2str(
int attrs,
char *buf,
size_t len)
244 return __flags2str(attrs, buf, len, neigh_attrs,
245 ARRAY_SIZE(neigh_attrs));
248 static struct nla_policy neigh_policy[NDA_MAX+1] = {
249 [NDA_CACHEINFO] = { .
minlen =
sizeof(
struct nda_cacheinfo) },
250 [NDA_PROBES] = { .type =
NLA_U32 },
253 static int neigh_msg_parser(
struct nl_cache_ops *ops,
struct sockaddr_nl *who,
256 struct rtnl_neigh *neigh;
257 struct nlattr *tb[NDA_MAX + 1];
261 neigh = rtnl_neigh_alloc();
267 neigh->ce_msgtype = n->nlmsg_type;
270 err =
nlmsg_parse(n,
sizeof(*nm), tb, NDA_MAX, neigh_policy);
274 neigh->n_family = nm->ndm_family;
275 neigh->n_ifindex = nm->ndm_ifindex;
276 neigh->n_state = nm->ndm_state;
277 neigh->n_flags = nm->ndm_flags;
278 neigh->n_type = nm->ndm_type;
280 neigh->ce_mask |= (NEIGH_ATTR_FAMILY | NEIGH_ATTR_IFINDEX |
281 NEIGH_ATTR_STATE | NEIGH_ATTR_FLAGS |
284 if (tb[NDA_LLADDR]) {
286 if (!neigh->n_lladdr) {
290 nl_addr_set_family(neigh->n_lladdr,
292 neigh->ce_mask |= NEIGH_ATTR_LLADDR;
301 neigh->ce_mask |= NEIGH_ATTR_DST;
304 if (tb[NDA_CACHEINFO]) {
305 struct nda_cacheinfo *ci =
nla_data(tb[NDA_CACHEINFO]);
307 neigh->n_cacheinfo.nci_confirmed = ci->ndm_confirmed;
308 neigh->n_cacheinfo.nci_used = ci->ndm_used;
309 neigh->n_cacheinfo.nci_updated = ci->ndm_updated;
310 neigh->n_cacheinfo.nci_refcnt = ci->ndm_refcnt;
312 neigh->ce_mask |= NEIGH_ATTR_CACHEINFO;
315 if (tb[NDA_PROBES]) {
317 neigh->ce_mask |= NEIGH_ATTR_PROBES;
322 rtnl_neigh_put(neigh);
326 static int neigh_request_update(
struct nl_cache *c,
struct nl_sock *h)
334 char dst[INET6_ADDRSTRLEN+5], lladdr[INET6_ADDRSTRLEN+5];
335 struct rtnl_neigh *n = (
struct rtnl_neigh *) a;
336 struct nl_cache *link_cache;
337 char state[128], flags[64];
341 nl_dump_line(p,
"%s ",
nl_addr2str(n->n_dst, dst,
sizeof(dst)));
346 state,
sizeof(state)));
348 nl_dump(p,
"dev %d ", n->n_ifindex);
350 if (n->ce_mask & NEIGH_ATTR_LLADDR)
354 rtnl_neigh_state2str(n->n_state, state,
sizeof(state));
355 rtnl_neigh_flags2str(n->n_flags, flags,
sizeof(flags));
360 nl_dump(p,
"%s%s", state[0] ?
"," :
"<", flags);
361 if (state[0] || flags[0])
369 struct rtnl_neigh *n = (
struct rtnl_neigh *) a;
372 neigh_dump_line(a, p);
374 nl_dump_line(p,
" refcnt %u type %s confirmed %u used "
376 n->n_cacheinfo.nci_refcnt,
377 nl_rtntype2str(n->n_type, rtn_type,
sizeof(rtn_type)),
378 n->n_cacheinfo.nci_confirmed/hz,
379 n->n_cacheinfo.nci_used/hz, n->n_cacheinfo.nci_updated/hz);
384 neigh_dump_details(a, p);
392 struct rtnl_neigh *rtnl_neigh_alloc(
void)
397 void rtnl_neigh_put(
struct rtnl_neigh *neigh)
434 struct rtnl_neigh *neigh;
436 nl_list_for_each_entry(neigh, &cache->c_items, ce_list) {
437 if (neigh->n_ifindex == ifindex &&
454 static int build_neigh_msg(
struct rtnl_neigh *tmpl,
int cmd,
int flags,
455 struct nl_msg **result)
458 struct ndmsg nhdr = {
459 .ndm_ifindex = tmpl->n_ifindex,
460 .ndm_state = NUD_PERMANENT,
463 if (!(tmpl->ce_mask & NEIGH_ATTR_DST))
464 return -NLE_MISSING_ATTR;
466 nhdr.ndm_family = nl_addr_get_family(tmpl->n_dst);
468 if (tmpl->ce_mask & NEIGH_ATTR_FLAGS)
469 nhdr.ndm_flags = tmpl->n_flags;
471 if (tmpl->ce_mask & NEIGH_ATTR_STATE)
472 nhdr.ndm_state = tmpl->n_state;
478 if (
nlmsg_append(msg, &nhdr,
sizeof(nhdr), NLMSG_ALIGNTO) < 0)
479 goto nla_put_failure;
483 if (tmpl->ce_mask & NEIGH_ATTR_LLADDR)
515 struct nl_msg **result)
517 return build_neigh_msg(tmpl, RTM_NEWNEIGH, flags, result);
546 err = nl_send_auto_complete(sk, msg);
551 return wait_for_ack(sk);
576 struct nl_msg **result)
578 return build_neigh_msg(neigh, RTM_DELNEIGH, flags, result);
602 err = nl_send_auto_complete(sk, msg);
607 return wait_for_ack(sk);
617 static const struct trans_tbl neigh_states[] = {
618 __ADD(NUD_INCOMPLETE, incomplete)
619 __ADD(NUD_REACHABLE, reachable)
620 __ADD(NUD_STALE, stale)
621 __ADD(NUD_DELAY, delay)
622 __ADD(NUD_PROBE, probe)
623 __ADD(NUD_FAILED, failed)
624 __ADD(NUD_NOARP, norarp)
625 __ADD(NUD_PERMANENT, permanent)
628 char * rtnl_neigh_state2str(
int state,
char *buf,
size_t len)
630 return __flags2str(state, buf, len, neigh_states,
631 ARRAY_SIZE(neigh_states));
634 int rtnl_neigh_str2state(
const char *name)
636 return __str2type(name, neigh_states, ARRAY_SIZE(neigh_states));
646 static const struct trans_tbl neigh_flags[] = {
648 __ADD(NTF_PROXY, proxy)
649 __ADD(NTF_ROUTER, router)
652 char * rtnl_neigh_flags2str(
int flags,
char *buf,
size_t len)
654 return __flags2str(flags, buf, len, neigh_flags,
655 ARRAY_SIZE(neigh_flags));
658 int rtnl_neigh_str2flag(
const char *name)
660 return __str2type(name, neigh_flags, ARRAY_SIZE(neigh_flags));
670 void rtnl_neigh_set_state(
struct rtnl_neigh *neigh,
int state)
672 neigh->n_state_mask |= state;
673 neigh->n_state |= state;
674 neigh->ce_mask |= NEIGH_ATTR_STATE;
677 int rtnl_neigh_get_state(
struct rtnl_neigh *neigh)
679 if (neigh->ce_mask & NEIGH_ATTR_STATE)
680 return neigh->n_state;
685 void rtnl_neigh_unset_state(
struct rtnl_neigh *neigh,
int state)
687 neigh->n_state_mask |= state;
688 neigh->n_state &= ~state;
689 neigh->ce_mask |= NEIGH_ATTR_STATE;
692 void rtnl_neigh_set_flags(
struct rtnl_neigh *neigh,
unsigned int flags)
694 neigh->n_flag_mask |= flags;
695 neigh->n_flags |= flags;
696 neigh->ce_mask |= NEIGH_ATTR_FLAGS;
699 unsigned int rtnl_neigh_get_flags(
struct rtnl_neigh *neigh)
701 return neigh->n_flags;
704 void rtnl_neigh_unset_flags(
struct rtnl_neigh *neigh,
unsigned int flags)
706 neigh->n_flag_mask |= flags;
707 neigh->n_flags &= ~flags;
708 neigh->ce_mask |= NEIGH_ATTR_FLAGS;
711 void rtnl_neigh_set_ifindex(
struct rtnl_neigh *neigh,
int ifindex)
713 neigh->n_ifindex = ifindex;
714 neigh->ce_mask |= NEIGH_ATTR_IFINDEX;
717 int rtnl_neigh_get_ifindex(
struct rtnl_neigh *neigh)
719 return neigh->n_ifindex;
722 static inline int __assign_addr(
struct rtnl_neigh *neigh,
struct nl_addr **pos,
723 struct nl_addr *
new,
int flag,
int nocheck)
726 if (neigh->ce_mask & NEIGH_ATTR_FAMILY) {
727 if (new->a_family != neigh->n_family)
728 return -NLE_AF_MISMATCH;
730 neigh->n_family =
new->a_family;
731 neigh->ce_mask |= NEIGH_ATTR_FAMILY;
741 neigh->ce_mask |= flag;
746 void rtnl_neigh_set_lladdr(
struct rtnl_neigh *neigh,
struct nl_addr *addr)
748 __assign_addr(neigh, &neigh->n_lladdr, addr, NEIGH_ATTR_LLADDR, 1);
751 struct nl_addr *rtnl_neigh_get_lladdr(
struct rtnl_neigh *neigh)
753 if (neigh->ce_mask & NEIGH_ATTR_LLADDR)
754 return neigh->n_lladdr;
759 int rtnl_neigh_set_dst(
struct rtnl_neigh *neigh,
struct nl_addr *addr)
761 return __assign_addr(neigh, &neigh->n_dst, addr,
765 struct nl_addr *rtnl_neigh_get_dst(
struct rtnl_neigh *neigh)
767 if (neigh->ce_mask & NEIGH_ATTR_DST)
773 void rtnl_neigh_set_family(
struct rtnl_neigh *neigh,
int family)
775 neigh->n_family = family;
776 neigh->ce_mask |= NEIGH_ATTR_FAMILY;
779 int rtnl_neigh_get_family(
struct rtnl_neigh *neigh)
781 return neigh->n_family;
784 void rtnl_neigh_set_type(
struct rtnl_neigh *neigh,
int type)
786 neigh->n_type = type;
787 neigh->ce_mask = NEIGH_ATTR_TYPE;
790 int rtnl_neigh_get_type(
struct rtnl_neigh *neigh)
792 if (neigh->ce_mask & NEIGH_ATTR_TYPE)
793 return neigh->n_type;
802 .oo_size =
sizeof(
struct rtnl_neigh),
803 .oo_free_data = neigh_free_data,
804 .oo_clone = neigh_clone,
810 .oo_compare = neigh_compare,
811 .oo_attrs2str = neigh_attrs2str,
812 .oo_id_attrs = (NEIGH_ATTR_IFINDEX | NEIGH_ATTR_DST | NEIGH_ATTR_FAMILY),
816 { AF_UNSPEC, RTNLGRP_NEIGH },
817 { END_OF_GROUP_LIST },
822 .co_hdrsize =
sizeof(
struct ndmsg),
824 { RTM_NEWNEIGH, NL_ACT_NEW,
"new" },
825 { RTM_DELNEIGH, NL_ACT_DEL,
"del" },
826 { RTM_GETNEIGH, NL_ACT_GET,
"get" },
827 END_OF_MSGTYPES_LIST,
829 .co_protocol = NETLINK_ROUTE,
830 .co_groups = neigh_groups,
831 .co_request_update = neigh_request_update,
832 .co_msg_parser = neigh_msg_parser,
833 .co_obj_ops = &neigh_obj_ops,
836 static void __init neigh_init(
void)
841 static void __exit neigh_exit(
void)