2 * lib/route/addr.c Addresses
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation version 2.1
9 * Copyright (c) 2003-2012 Thomas Graf <tgraf@suug.ch>
10 * Copyright (c) 2003-2006 Baruch Even <baruch@ev-en.org>,
11 * Mediatrix Telecom, inc. <ericb@mediatrix.com>
16 * @defgroup rtaddr Addresses
19 * @note The maximum size of an address label is IFNAMSIZ.
21 * @note The address may not contain a prefix length if the peer address
22 * has been specified already.
24 * @par 1) Address Addition
26 * // Allocate an empty address object to be filled out with the attributes
27 * // of the new address.
28 * struct rtnl_addr *addr = rtnl_addr_alloc();
30 * // Fill out the mandatory attributes of the new address. Setting the
31 * // local address will automatically set the address family and the
32 * // prefix length to the correct values.
33 * rtnl_addr_set_ifindex(addr, ifindex);
34 * rtnl_addr_set_local(addr, local_addr);
36 * // The label of the address can be specified, currently only supported
37 * // by IPv4 and DECnet.
38 * rtnl_addr_set_label(addr, "mylabel");
40 * // The peer address can be specified if necessary, in either case a peer
41 * // address will be sent to the kernel in order to fullfil the interface
42 * // requirements. If none is set, it will equal the local address.
43 * // Note: Real peer addresses are only supported by IPv4 for now.
44 * rtnl_addr_set_peer(addr, peer_addr);
46 * // In case you want to have the address have a scope other than global
47 * // it may be overwritten using rtnl_addr_set_scope(). The scope currently
48 * // cannot be set for IPv6 addresses.
49 * rtnl_addr_set_scope(addr, rtnl_str2scope("site"));
51 * // Broadcast address may be specified using the relevant
52 * // functions, the address family will be verified if one of the other
53 * // addresses has been set already. Currently only works for IPv4.
54 * rtnl_addr_set_broadcast(addr, broadcast_addr);
56 * // Build the netlink message and send it to the kernel, the operation will
57 * // block until the operation has been completed. Alternatively the required
58 * // netlink message can be built using rtnl_addr_build_add_request() to be
59 * // sent out using nl_send_auto_complete().
60 * rtnl_addr_add(sk, addr, 0);
63 * rtnl_addr_put(addr);
66 * @par 2) Address Deletion
68 * // Allocate an empty address object to be filled out with the attributes
69 * // matching the address to be deleted. Alternatively a fully equipped
70 * // address object out of a cache can be used instead.
71 * struct rtnl_addr *addr = rtnl_addr_alloc();
73 * // The only mandatory parameter besides the address family is the interface
74 * // index the address is on, i.e. leaving out all other parameters will
75 * // result in all addresses of the specified address family interface tuple
77 * rtnl_addr_set_ifindex(addr, ifindex);
79 * // Specyfing the address family manually is only required if neither the
80 * // local nor peer address have been specified.
81 * rtnl_addr_set_family(addr, AF_INET);
83 * // Specyfing the local address is optional but the best choice to delete
84 * // specific addresses.
85 * rtnl_addr_set_local(addr, local_addr);
87 * // The label of the address can be specified, currently only supported
88 * // by IPv4 and DECnet.
89 * rtnl_addr_set_label(addr, "mylabel");
91 * // The peer address can be specified if necessary, in either case a peer
92 * // address will be sent to the kernel in order to fullfil the interface
93 * // requirements. If none is set, it will equal the local address.
94 * // Note: Real peer addresses are only supported by IPv4 for now.
95 * rtnl_addr_set_peer(addr, peer_addr);
97 * // Build the netlink message and send it to the kernel, the operation will
98 * // block until the operation has been completed. Alternatively the required
99 * // netlink message can be built using rtnl_addr_build_delete_request()
100 * // to be sent out using nl_send_auto_complete().
101 * rtnl_addr_delete(sk, addr, 0);
104 * rtnl_addr_put(addr);
109 #include <netlink-private/netlink.h>
110 #include <netlink/netlink.h>
111 #include <netlink/route/rtnl.h>
112 #include <netlink/route/addr.h>
113 #include <netlink/route/route.h>
114 #include <netlink/route/link.h>
115 #include <netlink/utils.h>
118 #define ADDR_ATTR_FAMILY 0x0001
119 #define ADDR_ATTR_PREFIXLEN 0x0002
120 #define ADDR_ATTR_FLAGS 0x0004
121 #define ADDR_ATTR_SCOPE 0x0008
122 #define ADDR_ATTR_IFINDEX 0x0010
123 #define ADDR_ATTR_LABEL 0x0020
124 #define ADDR_ATTR_CACHEINFO 0x0040
125 #define ADDR_ATTR_PEER 0x0080
126 #define ADDR_ATTR_LOCAL 0x0100
127 #define ADDR_ATTR_BROADCAST 0x0200
128 #define ADDR_ATTR_MULTICAST 0x0400
129 #define ADDR_ATTR_ANYCAST 0x0800
131 static struct nl_cache_ops rtnl_addr_ops;
132 static struct nl_object_ops addr_obj_ops;
135 static void addr_constructor(struct nl_object *obj)
137 struct rtnl_addr *addr = nl_object_priv(obj);
139 addr->a_scope = RT_SCOPE_NOWHERE;
142 static void addr_free_data(struct nl_object *obj)
144 struct rtnl_addr *addr = nl_object_priv(obj);
149 nl_addr_put(addr->a_peer);
150 nl_addr_put(addr->a_local);
151 nl_addr_put(addr->a_bcast);
152 nl_addr_put(addr->a_multicast);
153 nl_addr_put(addr->a_anycast);
154 rtnl_link_put(addr->a_link);
157 static int addr_clone(struct nl_object *_dst, struct nl_object *_src)
159 struct rtnl_addr *dst = nl_object_priv(_dst);
160 struct rtnl_addr *src = nl_object_priv(_src);
163 nl_object_get(OBJ_CAST(src->a_link));
164 dst->a_link = src->a_link;
168 if (!(dst->a_peer = nl_addr_clone(src->a_peer)))
172 if (!(dst->a_local = nl_addr_clone(src->a_local)))
176 if (!(dst->a_bcast = nl_addr_clone(src->a_bcast)))
179 if (src->a_multicast)
180 if (!(dst->a_multicast = nl_addr_clone(src->a_multicast)))
184 if (!(dst->a_anycast = nl_addr_clone(src->a_anycast)))
190 static struct nla_policy addr_policy[IFA_MAX+1] = {
191 [IFA_LABEL] = { .type = NLA_STRING,
192 .maxlen = IFNAMSIZ },
193 [IFA_CACHEINFO] = { .minlen = sizeof(struct ifa_cacheinfo) },
196 static int addr_msg_parser(struct nl_cache_ops *ops, struct sockaddr_nl *who,
197 struct nlmsghdr *nlh, struct nl_parser_param *pp)
199 struct rtnl_addr *addr;
200 struct ifaddrmsg *ifa;
201 struct nlattr *tb[IFA_MAX+1];
203 struct nl_cache *link_cache;
204 struct nl_addr *plen_addr = NULL;
206 addr = rtnl_addr_alloc();
210 addr->ce_msgtype = nlh->nlmsg_type;
212 err = nlmsg_parse(nlh, sizeof(*ifa), tb, IFA_MAX, addr_policy);
216 ifa = nlmsg_data(nlh);
217 addr->a_family = family = ifa->ifa_family;
218 addr->a_prefixlen = ifa->ifa_prefixlen;
219 addr->a_flags = ifa->ifa_flags;
220 addr->a_scope = ifa->ifa_scope;
221 addr->a_ifindex = ifa->ifa_index;
223 addr->ce_mask = (ADDR_ATTR_FAMILY | ADDR_ATTR_PREFIXLEN |
224 ADDR_ATTR_FLAGS | ADDR_ATTR_SCOPE | ADDR_ATTR_IFINDEX);
227 nla_strlcpy(addr->a_label, tb[IFA_LABEL], IFNAMSIZ);
228 addr->ce_mask |= ADDR_ATTR_LABEL;
232 if (tb[IFA_CACHEINFO]) {
233 struct ifa_cacheinfo *ca;
235 ca = nla_data(tb[IFA_CACHEINFO]);
236 addr->a_cacheinfo.aci_prefered = ca->ifa_prefered;
237 addr->a_cacheinfo.aci_valid = ca->ifa_valid;
238 addr->a_cacheinfo.aci_cstamp = ca->cstamp;
239 addr->a_cacheinfo.aci_tstamp = ca->tstamp;
240 addr->ce_mask |= ADDR_ATTR_CACHEINFO;
244 addr->a_local = nl_addr_alloc_attr(tb[IFA_LOCAL], family);
247 addr->ce_mask |= ADDR_ATTR_LOCAL;
248 plen_addr = addr->a_local;
251 if (tb[IFA_ADDRESS]) {
254 a = nl_addr_alloc_attr(tb[IFA_ADDRESS], family);
258 /* IPv6 sends the local address as IFA_ADDRESS with
259 * no IFA_LOCAL, IPv4 sends both IFA_LOCAL and IFA_ADDRESS
260 * with IFA_ADDRESS being the peer address if they differ */
261 if (!tb[IFA_LOCAL] || !nl_addr_cmp(a, addr->a_local)) {
262 nl_addr_put(addr->a_local);
264 addr->ce_mask |= ADDR_ATTR_LOCAL;
267 addr->ce_mask |= ADDR_ATTR_PEER;
274 nl_addr_set_prefixlen(plen_addr, addr->a_prefixlen);
277 if (tb[IFA_BROADCAST]) {
278 addr->a_bcast = nl_addr_alloc_attr(tb[IFA_BROADCAST], family);
282 addr->ce_mask |= ADDR_ATTR_BROADCAST;
286 if (tb[IFA_MULTICAST]) {
287 addr->a_multicast = nl_addr_alloc_attr(tb[IFA_MULTICAST],
289 if (!addr->a_multicast)
292 addr->ce_mask |= ADDR_ATTR_MULTICAST;
296 if (tb[IFA_ANYCAST]) {
297 addr->a_anycast = nl_addr_alloc_attr(tb[IFA_ANYCAST],
299 if (!addr->a_anycast)
302 addr->ce_mask |= ADDR_ATTR_ANYCAST;
305 if ((link_cache = __nl_cache_mngt_require("route/link"))) {
306 struct rtnl_link *link;
308 if ((link = rtnl_link_get(link_cache, addr->a_ifindex))) {
309 rtnl_addr_set_link(addr, link);
311 /* rtnl_addr_set_link incs refcnt */
316 err = pp->pp_cb((struct nl_object *) addr, pp);
327 static int addr_request_update(struct nl_cache *cache, struct nl_sock *sk)
329 return nl_rtgen_request(sk, RTM_GETADDR, AF_UNSPEC, NLM_F_DUMP);
332 static void addr_dump_line(struct nl_object *obj, struct nl_dump_params *p)
334 struct rtnl_addr *addr = (struct rtnl_addr *) obj;
335 struct nl_cache *link_cache;
338 link_cache = nl_cache_mngt_require_safe("route/link");
340 if (addr->ce_mask & ADDR_ATTR_LOCAL)
341 nl_dump_line(p, "%s",
342 nl_addr2str(addr->a_local, buf, sizeof(buf)));
344 nl_dump_line(p, "none");
346 if (addr->ce_mask & ADDR_ATTR_PEER)
347 nl_dump(p, " peer %s",
348 nl_addr2str(addr->a_peer, buf, sizeof(buf)));
350 nl_dump(p, " %s ", nl_af2str(addr->a_family, buf, sizeof(buf)));
353 nl_dump(p, "dev %s ",
354 rtnl_link_i2name(link_cache, addr->a_ifindex,
357 nl_dump(p, "dev %d ", addr->a_ifindex);
359 nl_dump(p, "scope %s",
360 rtnl_scope2str(addr->a_scope, buf, sizeof(buf)));
362 rtnl_addr_flags2str(addr->a_flags, buf, sizeof(buf));
364 nl_dump(p, " <%s>", buf);
369 nl_cache_put(link_cache);
372 static void addr_dump_details(struct nl_object *obj, struct nl_dump_params *p)
374 struct rtnl_addr *addr = (struct rtnl_addr *) obj;
377 addr_dump_line(obj, p);
379 if (addr->ce_mask & (ADDR_ATTR_LABEL | ADDR_ATTR_BROADCAST |
380 ADDR_ATTR_MULTICAST)) {
381 nl_dump_line(p, " ");
383 if (addr->ce_mask & ADDR_ATTR_LABEL)
384 nl_dump(p, " label %s", addr->a_label);
386 if (addr->ce_mask & ADDR_ATTR_BROADCAST)
387 nl_dump(p, " broadcast %s",
388 nl_addr2str(addr->a_bcast, buf, sizeof(buf)));
390 if (addr->ce_mask & ADDR_ATTR_MULTICAST)
391 nl_dump(p, " multicast %s",
392 nl_addr2str(addr->a_multicast, buf,
395 if (addr->ce_mask & ADDR_ATTR_ANYCAST)
396 nl_dump(p, " anycast %s",
397 nl_addr2str(addr->a_anycast, buf,
403 if (addr->ce_mask & ADDR_ATTR_CACHEINFO) {
404 struct rtnl_addr_cacheinfo *ci = &addr->a_cacheinfo;
406 nl_dump_line(p, " valid-lifetime %s",
407 ci->aci_valid == 0xFFFFFFFFU ? "forever" :
408 nl_msec2str(ci->aci_valid * 1000,
411 nl_dump(p, " preferred-lifetime %s\n",
412 ci->aci_prefered == 0xFFFFFFFFU ? "forever" :
413 nl_msec2str(ci->aci_prefered * 1000,
416 nl_dump_line(p, " created boot-time+%s ",
417 nl_msec2str(addr->a_cacheinfo.aci_cstamp * 10,
420 nl_dump(p, "last-updated boot-time+%s\n",
421 nl_msec2str(addr->a_cacheinfo.aci_tstamp * 10,
426 static void addr_dump_stats(struct nl_object *obj, struct nl_dump_params *p)
428 addr_dump_details(obj, p);
431 static int addr_compare(struct nl_object *_a, struct nl_object *_b,
432 uint32_t attrs, int flags)
434 struct rtnl_addr *a = (struct rtnl_addr *) _a;
435 struct rtnl_addr *b = (struct rtnl_addr *) _b;
438 #define ADDR_DIFF(ATTR, EXPR) ATTR_DIFF(attrs, ADDR_ATTR_##ATTR, a, b, EXPR)
440 diff |= ADDR_DIFF(IFINDEX, a->a_ifindex != b->a_ifindex);
441 diff |= ADDR_DIFF(FAMILY, a->a_family != b->a_family);
442 diff |= ADDR_DIFF(SCOPE, a->a_scope != b->a_scope);
443 diff |= ADDR_DIFF(LABEL, strcmp(a->a_label, b->a_label));
444 diff |= ADDR_DIFF(PEER, nl_addr_cmp(a->a_peer, b->a_peer));
445 diff |= ADDR_DIFF(LOCAL, nl_addr_cmp(a->a_local, b->a_local));
446 diff |= ADDR_DIFF(MULTICAST, nl_addr_cmp(a->a_multicast,
448 diff |= ADDR_DIFF(BROADCAST, nl_addr_cmp(a->a_bcast, b->a_bcast));
449 diff |= ADDR_DIFF(ANYCAST, nl_addr_cmp(a->a_anycast, b->a_anycast));
451 if (flags & LOOSE_COMPARISON)
452 diff |= ADDR_DIFF(FLAGS,
453 (a->a_flags ^ b->a_flags) & b->a_flag_mask);
455 diff |= ADDR_DIFF(FLAGS, a->a_flags != b->a_flags);
462 static const struct trans_tbl addr_attrs[] = {
463 __ADD(ADDR_ATTR_FAMILY, family)
464 __ADD(ADDR_ATTR_PREFIXLEN, prefixlen)
465 __ADD(ADDR_ATTR_FLAGS, flags)
466 __ADD(ADDR_ATTR_SCOPE, scope)
467 __ADD(ADDR_ATTR_IFINDEX, ifindex)
468 __ADD(ADDR_ATTR_LABEL, label)
469 __ADD(ADDR_ATTR_CACHEINFO, cacheinfo)
470 __ADD(ADDR_ATTR_PEER, peer)
471 __ADD(ADDR_ATTR_LOCAL, local)
472 __ADD(ADDR_ATTR_BROADCAST, broadcast)
473 __ADD(ADDR_ATTR_MULTICAST, multicast)
476 static char *addr_attrs2str(int attrs, char *buf, size_t len)
478 return __flags2str(attrs, buf, len, addr_attrs,
479 ARRAY_SIZE(addr_attrs));
483 * @name Allocation/Freeing
487 struct rtnl_addr *rtnl_addr_alloc(void)
489 return (struct rtnl_addr *) nl_object_alloc(&addr_obj_ops);
492 void rtnl_addr_put(struct rtnl_addr *addr)
494 nl_object_put((struct nl_object *) addr);
500 * @name Cache Management
504 int rtnl_addr_alloc_cache(struct nl_sock *sk, struct nl_cache **result)
506 return nl_cache_alloc_and_fill(&rtnl_addr_ops, sk, result);
510 * Search address in cache
511 * @arg cache Address cache
512 * @arg ifindex Interface index of address
513 * @arg addr Local address part
515 * Searches address cache previously allocated with rtnl_addr_alloc_cache()
516 * for an address with a matching local address.
518 * The reference counter is incremented before returning the address, therefore
519 * the reference must be given back with rtnl_addr_put() after usage.
521 * @return Address object or NULL if no match was found.
523 struct rtnl_addr *rtnl_addr_get(struct nl_cache *cache, int ifindex,
524 struct nl_addr *addr)
528 if (cache->c_ops != &rtnl_addr_ops)
531 nl_list_for_each_entry(a, &cache->c_items, ce_list) {
532 if (ifindex && a->a_ifindex != ifindex)
535 if (a->ce_mask & ADDR_ATTR_LOCAL &&
536 !nl_addr_cmp(a->a_local, addr)) {
537 nl_object_get((struct nl_object *) a);
547 static int build_addr_msg(struct rtnl_addr *tmpl, int cmd, int flags,
548 struct nl_msg **result)
551 struct ifaddrmsg am = {
552 .ifa_family = tmpl->a_family,
553 .ifa_index = tmpl->a_ifindex,
554 .ifa_prefixlen = tmpl->a_prefixlen,
557 if (tmpl->ce_mask & ADDR_ATTR_SCOPE)
558 am.ifa_scope = tmpl->a_scope;
560 /* compatibility hack */
561 if (tmpl->a_family == AF_INET &&
562 tmpl->ce_mask & ADDR_ATTR_LOCAL &&
563 *((char *) nl_addr_get_binary_addr(tmpl->a_local)) == 127)
564 am.ifa_scope = RT_SCOPE_HOST;
566 am.ifa_scope = RT_SCOPE_UNIVERSE;
569 msg = nlmsg_alloc_simple(cmd, flags);
573 if (nlmsg_append(msg, &am, sizeof(am), NLMSG_ALIGNTO) < 0)
574 goto nla_put_failure;
576 if (tmpl->ce_mask & ADDR_ATTR_LOCAL)
577 NLA_PUT_ADDR(msg, IFA_LOCAL, tmpl->a_local);
579 if (tmpl->ce_mask & ADDR_ATTR_PEER)
580 NLA_PUT_ADDR(msg, IFA_ADDRESS, tmpl->a_peer);
581 else if (tmpl->ce_mask & ADDR_ATTR_LOCAL)
582 NLA_PUT_ADDR(msg, IFA_ADDRESS, tmpl->a_local);
584 if (tmpl->ce_mask & ADDR_ATTR_LABEL)
585 NLA_PUT_STRING(msg, IFA_LABEL, tmpl->a_label);
587 if (tmpl->ce_mask & ADDR_ATTR_BROADCAST)
588 NLA_PUT_ADDR(msg, IFA_BROADCAST, tmpl->a_bcast);
590 if (tmpl->ce_mask & ADDR_ATTR_CACHEINFO) {
591 struct ifa_cacheinfo ca = {
592 .ifa_valid = tmpl->a_cacheinfo.aci_valid,
593 .ifa_prefered = tmpl->a_cacheinfo.aci_prefered,
596 NLA_PUT(msg, IFA_CACHEINFO, sizeof(ca), &ca);
614 * Build netlink request message to request addition of new address
615 * @arg addr Address object representing the new address.
616 * @arg flags Additional netlink message flags.
617 * @arg result Pointer to store resulting message.
619 * Builds a new netlink message requesting the addition of a new
620 * address. The netlink message header isn't fully equipped with
621 * all relevant fields and must thus be sent out via nl_send_auto_complete()
622 * or supplemented as needed.
624 * Minimal required attributes:
625 * - interface index (rtnl_addr_set_ifindex())
626 * - local address (rtnl_addr_set_local())
628 * The scope will default to universe except for loopback addresses in
629 * which case a host scope is used if not specified otherwise.
631 * @note Free the memory after usage using nlmsg_free().
633 * @return 0 on success or a negative error code.
635 int rtnl_addr_build_add_request(struct rtnl_addr *addr, int flags,
636 struct nl_msg **result)
638 uint32_t required = ADDR_ATTR_IFINDEX | ADDR_ATTR_FAMILY |
639 ADDR_ATTR_PREFIXLEN | ADDR_ATTR_LOCAL;
641 if ((addr->ce_mask & required) != required)
642 return -NLE_MISSING_ATTR;
644 return build_addr_msg(addr, RTM_NEWADDR, NLM_F_CREATE | flags, result);
648 * Request addition of new address
649 * @arg sk Netlink socket.
650 * @arg addr Address object representing the new address.
651 * @arg flags Additional netlink message flags.
653 * Builds a netlink message by calling rtnl_addr_build_add_request(),
654 * sends the request to the kernel and waits for the next ACK to be
655 * received and thus blocks until the request has been fullfilled.
657 * @see rtnl_addr_build_add_request()
659 * @return 0 on sucess or a negative error if an error occured.
661 int rtnl_addr_add(struct nl_sock *sk, struct rtnl_addr *addr, int flags)
666 if ((err = rtnl_addr_build_add_request(addr, flags, &msg)) < 0)
669 err = nl_send_auto_complete(sk, msg);
674 return wait_for_ack(sk);
685 * Build a netlink request message to request deletion of an address
686 * @arg addr Address object to be deleteted.
687 * @arg flags Additional netlink message flags.
688 * @arg result Pointer to store resulting message.
690 * Builds a new netlink message requesting a deletion of an address.
691 * The netlink message header isn't fully equipped with all relevant
692 * fields and must thus be sent out via nl_send_auto_complete()
693 * or supplemented as needed.
695 * Minimal required attributes:
696 * - interface index (rtnl_addr_set_ifindex())
697 * - address family (rtnl_addr_set_family())
699 * Optional attributes:
700 * - local address (rtnl_addr_set_local())
701 * - label (rtnl_addr_set_label(), IPv4/DECnet only)
702 * - peer address (rtnl_addr_set_peer(), IPv4 only)
704 * @note Free the memory after usage using nlmsg_free().
706 * @return 0 on success or a negative error code.
708 int rtnl_addr_build_delete_request(struct rtnl_addr *addr, int flags,
709 struct nl_msg **result)
711 uint32_t required = ADDR_ATTR_IFINDEX | ADDR_ATTR_FAMILY;
713 if ((addr->ce_mask & required) != required)
714 return -NLE_MISSING_ATTR;
716 return build_addr_msg(addr, RTM_DELADDR, flags, result);
720 * Request deletion of an address
721 * @arg sk Netlink socket.
722 * @arg addr Address object to be deleted.
723 * @arg flags Additional netlink message flags.
725 * Builds a netlink message by calling rtnl_addr_build_delete_request(),
726 * sends the request to the kernel and waits for the next ACK to be
727 * received and thus blocks until the request has been fullfilled.
729 * @see rtnl_addr_build_delete_request();
731 * @return 0 on sucess or a negative error if an error occured.
733 int rtnl_addr_delete(struct nl_sock *sk, struct rtnl_addr *addr, int flags)
738 if ((err = rtnl_addr_build_delete_request(addr, flags, &msg)) < 0)
741 err = nl_send_auto_complete(sk, msg);
746 return wait_for_ack(sk);
756 int rtnl_addr_set_label(struct rtnl_addr *addr, const char *label)
758 if (strlen(label) > sizeof(addr->a_label) - 1)
761 strcpy(addr->a_label, label);
762 addr->ce_mask |= ADDR_ATTR_LABEL;
767 char *rtnl_addr_get_label(struct rtnl_addr *addr)
769 if (addr->ce_mask & ADDR_ATTR_LABEL)
770 return addr->a_label;
775 void rtnl_addr_set_ifindex(struct rtnl_addr *addr, int ifindex)
777 addr->a_ifindex = ifindex;
778 addr->ce_mask |= ADDR_ATTR_IFINDEX;
781 int rtnl_addr_get_ifindex(struct rtnl_addr *addr)
783 return addr->a_ifindex;
786 void rtnl_addr_set_link(struct rtnl_addr *addr, struct rtnl_link *link)
788 rtnl_link_put(addr->a_link);
793 nl_object_get(OBJ_CAST(link));
795 addr->a_ifindex = link->l_index;
796 addr->ce_mask |= ADDR_ATTR_IFINDEX;
799 struct rtnl_link *rtnl_addr_get_link(struct rtnl_addr *addr)
802 nl_object_get(OBJ_CAST(addr->a_link));
809 void rtnl_addr_set_family(struct rtnl_addr *addr, int family)
811 addr->a_family = family;
812 addr->ce_mask |= ADDR_ATTR_FAMILY;
815 int rtnl_addr_get_family(struct rtnl_addr *addr)
817 return addr->a_family;
821 * Set the prefix length / netmask
823 * @arg prefixlen Length of prefix (netmask)
825 * Modifies the length of the prefix. If the address object contains a peer
826 * address the prefix length will apply to it, otherwise the prefix length
827 * will apply to the local address of the address.
829 * If the address object contains a peer or local address the corresponding
830 * `struct nl_addr` will be updated with the new prefix length.
832 * @note Specifying a length of 0 will remove the prefix length alltogether.
834 * @see rtnl_addr_get_prefixlen()
836 void rtnl_addr_set_prefixlen(struct rtnl_addr *addr, int prefixlen)
838 addr->a_prefixlen = prefixlen;
841 addr->ce_mask |= ADDR_ATTR_PREFIXLEN;
843 addr->ce_mask &= ~ADDR_ATTR_PREFIXLEN;
846 * The prefix length always applies to the peer address if
847 * a peer address is present.
850 nl_addr_set_prefixlen(addr->a_peer, prefixlen);
851 else if (addr->a_local)
852 nl_addr_set_prefixlen(addr->a_local, prefixlen);
855 int rtnl_addr_get_prefixlen(struct rtnl_addr *addr)
857 return addr->a_prefixlen;
860 void rtnl_addr_set_scope(struct rtnl_addr *addr, int scope)
862 addr->a_scope = scope;
863 addr->ce_mask |= ADDR_ATTR_SCOPE;
866 int rtnl_addr_get_scope(struct rtnl_addr *addr)
868 return addr->a_scope;
871 void rtnl_addr_set_flags(struct rtnl_addr *addr, unsigned int flags)
873 addr->a_flag_mask |= flags;
874 addr->a_flags |= flags;
875 addr->ce_mask |= ADDR_ATTR_FLAGS;
878 void rtnl_addr_unset_flags(struct rtnl_addr *addr, unsigned int flags)
880 addr->a_flag_mask |= flags;
881 addr->a_flags &= ~flags;
882 addr->ce_mask |= ADDR_ATTR_FLAGS;
885 unsigned int rtnl_addr_get_flags(struct rtnl_addr *addr)
887 return addr->a_flags;
890 static inline int __assign_addr(struct rtnl_addr *addr, struct nl_addr **pos,
891 struct nl_addr *new, int flag)
894 if (addr->ce_mask & ADDR_ATTR_FAMILY) {
895 if (new->a_family != addr->a_family)
896 return -NLE_AF_MISMATCH;
898 addr->a_family = new->a_family;
903 *pos = nl_addr_get(new);
904 addr->ce_mask |= (flag | ADDR_ATTR_FAMILY);
910 addr->ce_mask &= ~flag;
916 int rtnl_addr_set_local(struct rtnl_addr *addr, struct nl_addr *local)
920 /* Prohibit local address with prefix length if peer address is present */
921 if ((addr->ce_mask & ADDR_ATTR_PEER) && local &&
922 nl_addr_get_prefixlen(local))
925 err = __assign_addr(addr, &addr->a_local, local, ADDR_ATTR_LOCAL);
929 /* Never overwrite the prefix length if a peer address is present */
930 if (!(addr->ce_mask & ADDR_ATTR_PEER))
931 rtnl_addr_set_prefixlen(addr, local ? nl_addr_get_prefixlen(local) : 0);
936 struct nl_addr *rtnl_addr_get_local(struct rtnl_addr *addr)
938 return addr->a_local;
941 int rtnl_addr_set_peer(struct rtnl_addr *addr, struct nl_addr *peer)
945 if (peer && peer->a_family != AF_INET)
946 return -NLE_AF_NOSUPPORT;
948 err = __assign_addr(addr, &addr->a_peer, peer, ADDR_ATTR_PEER);
952 rtnl_addr_set_prefixlen(addr, peer ? nl_addr_get_prefixlen(peer) : 0);
957 struct nl_addr *rtnl_addr_get_peer(struct rtnl_addr *addr)
962 int rtnl_addr_set_broadcast(struct rtnl_addr *addr, struct nl_addr *bcast)
964 if (bcast && bcast->a_family != AF_INET)
965 return -NLE_AF_NOSUPPORT;
967 return __assign_addr(addr, &addr->a_bcast, bcast, ADDR_ATTR_BROADCAST);
970 struct nl_addr *rtnl_addr_get_broadcast(struct rtnl_addr *addr)
972 return addr->a_bcast;
975 int rtnl_addr_set_multicast(struct rtnl_addr *addr, struct nl_addr *multicast)
977 if (multicast && multicast->a_family != AF_INET6)
978 return -NLE_AF_NOSUPPORT;
980 return __assign_addr(addr, &addr->a_multicast, multicast,
981 ADDR_ATTR_MULTICAST);
984 struct nl_addr *rtnl_addr_get_multicast(struct rtnl_addr *addr)
986 return addr->a_multicast;
989 int rtnl_addr_set_anycast(struct rtnl_addr *addr, struct nl_addr *anycast)
991 if (anycast && anycast->a_family != AF_INET6)
992 return -NLE_AF_NOSUPPORT;
994 return __assign_addr(addr, &addr->a_anycast, anycast,
998 struct nl_addr *rtnl_addr_get_anycast(struct rtnl_addr *addr)
1000 return addr->a_anycast;
1003 uint32_t rtnl_addr_get_valid_lifetime(struct rtnl_addr *addr)
1005 if (addr->ce_mask & ADDR_ATTR_CACHEINFO)
1006 return addr->a_cacheinfo.aci_valid;
1011 void rtnl_addr_set_valid_lifetime(struct rtnl_addr *addr, uint32_t lifetime)
1013 addr->a_cacheinfo.aci_valid = lifetime;
1014 addr->ce_mask |= ADDR_ATTR_CACHEINFO;
1017 uint32_t rtnl_addr_get_preferred_lifetime(struct rtnl_addr *addr)
1019 if (addr->ce_mask & ADDR_ATTR_CACHEINFO)
1020 return addr->a_cacheinfo.aci_prefered;
1025 void rtnl_addr_set_preferred_lifetime(struct rtnl_addr *addr, uint32_t lifetime)
1027 addr->a_cacheinfo.aci_prefered = lifetime;
1028 addr->ce_mask |= ADDR_ATTR_CACHEINFO;
1031 uint32_t rtnl_addr_get_create_time(struct rtnl_addr *addr)
1033 return addr->a_cacheinfo.aci_cstamp;
1036 uint32_t rtnl_addr_get_last_update_time(struct rtnl_addr *addr)
1038 return addr->a_cacheinfo.aci_tstamp;
1044 * @name Flags Translations
1048 static const struct trans_tbl addr_flags[] = {
1049 __ADD(IFA_F_SECONDARY, secondary)
1050 __ADD(IFA_F_NODAD, nodad)
1051 __ADD(IFA_F_OPTIMISTIC, optimistic)
1052 __ADD(IFA_F_HOMEADDRESS, homeaddress)
1053 __ADD(IFA_F_DEPRECATED, deprecated)
1054 __ADD(IFA_F_TENTATIVE, tentative)
1055 __ADD(IFA_F_PERMANENT, permanent)
1058 char *rtnl_addr_flags2str(int flags, char *buf, size_t size)
1060 return __flags2str(flags, buf, size, addr_flags,
1061 ARRAY_SIZE(addr_flags));
1064 int rtnl_addr_str2flags(const char *name)
1066 return __str2flags(name, addr_flags, ARRAY_SIZE(addr_flags));
1071 static struct nl_object_ops addr_obj_ops = {
1072 .oo_name = "route/addr",
1073 .oo_size = sizeof(struct rtnl_addr),
1074 .oo_constructor = addr_constructor,
1075 .oo_free_data = addr_free_data,
1076 .oo_clone = addr_clone,
1078 [NL_DUMP_LINE] = addr_dump_line,
1079 [NL_DUMP_DETAILS] = addr_dump_details,
1080 [NL_DUMP_STATS] = addr_dump_stats,
1082 .oo_compare = addr_compare,
1083 .oo_attrs2str = addr_attrs2str,
1084 .oo_id_attrs = (ADDR_ATTR_FAMILY | ADDR_ATTR_IFINDEX |
1085 ADDR_ATTR_LOCAL | ADDR_ATTR_PREFIXLEN),
1088 static struct nl_af_group addr_groups[] = {
1089 { AF_INET, RTNLGRP_IPV4_IFADDR },
1090 { AF_INET6, RTNLGRP_IPV6_IFADDR },
1091 { END_OF_GROUP_LIST },
1094 static struct nl_cache_ops rtnl_addr_ops = {
1095 .co_name = "route/addr",
1096 .co_hdrsize = sizeof(struct ifaddrmsg),
1098 { RTM_NEWADDR, NL_ACT_NEW, "new" },
1099 { RTM_DELADDR, NL_ACT_DEL, "del" },
1100 { RTM_GETADDR, NL_ACT_GET, "get" },
1101 END_OF_MSGTYPES_LIST,
1103 .co_protocol = NETLINK_ROUTE,
1104 .co_groups = addr_groups,
1105 .co_request_update = addr_request_update,
1106 .co_msg_parser = addr_msg_parser,
1107 .co_obj_ops = &addr_obj_ops,
1110 static void __init addr_init(void)
1112 nl_cache_mngt_register(&rtnl_addr_ops);
1115 static void __exit addr_exit(void)
1117 nl_cache_mngt_unregister(&rtnl_addr_ops);