X-Git-Url: http://git.onelab.eu/?p=libnl.git;a=blobdiff_plain;f=lib%2Froute%2Faddr.c;fp=lib%2Froute%2Faddr.c;h=0000000000000000000000000000000000000000;hp=888daf1383ad495b4447404f82a64cc958449e05;hb=332c8b7561dcac7ac95cc0d07328b1cb22d780a6;hpb=eabdd897b75ecc1fac5e255229a899126085e57a diff --git a/lib/route/addr.c b/lib/route/addr.c deleted file mode 100644 index 888daf1..0000000 --- a/lib/route/addr.c +++ /dev/null @@ -1,1278 +0,0 @@ -/* - * lib/route/addr.c Addresses - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation version 2.1 - * of the License. - * - * Copyright (c) 2003-2006 Thomas Graf - * Baruch Even , - * Mediatrix Telecom, inc. - */ - -/** - * @ingroup rtnl - * @defgroup rtaddr Addresses - * @brief - * - * @par 1) Address Addition - * @code - * // Allocate an empty address object to be filled out with the attributes - * // of the new address. - * struct rtnl_addr *addr = rtnl_addr_alloc(); - * - * // Fill out the mandatory attributes of the new address. Setting the - * // local address will automatically set the address family and the - * // prefix length to the correct values. - * rtnl_addr_set_ifindex(addr, ifindex); - * rtnl_addr_set_local(addr, local_addr); - * - * // The label of the address can be specified, currently only supported - * // by IPv4 and DECnet. - * rtnl_addr_set_label(addr, "mylabel"); - * - * // The peer address can be specified if necessary, in either case a peer - * // address will be sent to the kernel in order to fullfil the interface - * // requirements. If none is set, it will equal the local address. - * // Note: Real peer addresses are only supported by IPv4 for now. - * rtnl_addr_set_peer(addr, peer_addr); - * - * // In case you want to have the address have a scope other than global - * // it may be overwritten using rtnl_addr_set_scope(). The scope currently - * // cannot be set for IPv6 addresses. - * rtnl_addr_set_scope(addr, rtnl_str2scope("site")); - * - * // Broadcast and anycast address may be specified using the relevant - * // functions, the address family will be verified if one of the other - * // addresses has been set already. Currently only works for IPv4. - * rtnl_addr_set_broadcast(addr, broadcast_addr); - * rtnl_addr_set_anycast(addr, anycast_addr); - * - * // Build the netlink message and send it to the kernel, the operation will - * // block until the operation has been completed. Alternatively the required - * // netlink message can be built using rtnl_addr_build_add_request() to be - * // sent out using nl_send_auto_complete(). - * rtnl_addr_add(handle, addr, 0); - * - * // Free the memory - * rtnl_addr_put(addr); - * @endcode - * - * @par 2) Address Deletion - * @code - * // Allocate an empty address object to be filled out with the attributes - * // matching the address to be deleted. Alternatively a fully equipped - * // address object out of a cache can be used instead. - * struct rtnl_addr *addr = rtnl_addr_alloc(); - * - * // The only mandatory parameter besides the address family is the interface - * // index the address is on, i.e. leaving out all other parameters will - * // result in all addresses of the specified address family interface tuple - * // to be deleted. - * rtnl_addr_set_ifindex(addr, ifindex); - * - * // Specyfing the address family manually is only required if neither the - * // local nor peer address have been specified. - * rtnl_addr_set_family(addr, AF_INET); - * - * // Specyfing the local address is optional but the best choice to delete - * // specific addresses. - * rtnl_addr_set_local(addr, local_addr); - * - * // The label of the address can be specified, currently only supported - * // by IPv4 and DECnet. - * rtnl_addr_set_label(addr, "mylabel"); - * - * // The peer address can be specified if necessary, in either case a peer - * // address will be sent to the kernel in order to fullfil the interface - * // requirements. If none is set, it will equal the local address. - * // Note: Real peer addresses are only supported by IPv4 for now. - * rtnl_addr_set_peer(addr, peer_addr); - * - * // Build the netlink message and send it to the kernel, the operation will - * // block until the operation has been completed. Alternatively the required - * // netlink message can be built using rtnl_addr_build_delete_request() - * // to be sent out using nl_send_auto_complete(). - * rtnl_addr_delete(handle, addr, 0); - * - * // Free the memory - * rtnl_addr_put(addr); - * @endcode - * @{ - */ - -#include -#include -#include -#include -#include -#include -#include - -/** @cond SKIP */ -#define ADDR_ATTR_FAMILY 0x0001 -#define ADDR_ATTR_PREFIXLEN 0x0002 -#define ADDR_ATTR_FLAGS 0x0004 -#define ADDR_ATTR_SCOPE 0x0008 -#define ADDR_ATTR_IFINDEX 0x0010 -#define ADDR_ATTR_LABEL 0x0020 -#define ADDR_ATTR_CACHEINFO 0x0040 -#define ADDR_ATTR_PEER 0x0080 -#define ADDR_ATTR_LOCAL 0x0100 -#define ADDR_ATTR_BROADCAST 0x0200 -#define ADDR_ATTR_ANYCAST 0x0400 -#define ADDR_ATTR_MULTICAST 0x0800 - -static struct nl_cache_ops rtnl_addr_ops; -/** @endcond */ - -static void addr_free_data(struct nl_object *obj) -{ - struct rtnl_addr *addr = nl_object_priv(obj); - - if (!addr) - return; - - nl_addr_put(addr->a_peer); - nl_addr_put(addr->a_local); - nl_addr_put(addr->a_bcast); - nl_addr_put(addr->a_anycast); - nl_addr_put(addr->a_multicast); -} - -static struct nla_policy addr_policy[IFA_MAX+1] = { - [IFA_LABEL] = { .type = NLA_STRING, - .maxlen = IFNAMSIZ }, - [IFA_CACHEINFO] = { .minlen = sizeof(struct ifa_cacheinfo) }, -}; - -static int addr_msg_parser(struct sockaddr_nl *who, struct nlmsghdr *nlh, - void *arg) -{ - struct rtnl_addr *addr; - struct nl_parser_param *pp = arg; - struct ifaddrmsg *ifa; - struct nlattr *tb[IFA_MAX+1]; - int err = -ENOMEM, peer_prefix = 0; - - addr = rtnl_addr_alloc(); - if (!addr) { - err = nl_errno(ENOMEM); - goto errout; - } - addr->ce_msgtype = nlh->nlmsg_type; - - err = nlmsg_parse(nlh, sizeof(*ifa), tb, IFA_MAX, addr_policy); - if (err < 0) - goto errout_free; - - ifa = nlmsg_data(nlh); - addr->a_family = ifa->ifa_family; - addr->a_prefixlen = ifa->ifa_prefixlen; - addr->a_flags = ifa->ifa_flags; - addr->a_scope = ifa->ifa_scope; - addr->a_ifindex = ifa->ifa_index; - - addr->a_mask = (ADDR_ATTR_FAMILY | ADDR_ATTR_PREFIXLEN | - ADDR_ATTR_FLAGS | ADDR_ATTR_SCOPE | ADDR_ATTR_IFINDEX); - - if (tb[IFA_LABEL]) { - nla_strlcpy(addr->a_label, tb[IFA_LABEL], IFNAMSIZ); - addr->a_mask |= ADDR_ATTR_LABEL; - } - - if (tb[IFA_CACHEINFO]) { - struct ifa_cacheinfo *ca; - - ca = nla_data(tb[IFA_CACHEINFO]); - addr->a_cacheinfo.aci_prefered = ca->ifa_prefered; - addr->a_cacheinfo.aci_valid = ca->ifa_valid; - addr->a_cacheinfo.aci_cstamp = ca->cstamp; - addr->a_cacheinfo.aci_tstamp = ca->tstamp; - addr->a_mask |= ADDR_ATTR_CACHEINFO; - } - - if (tb[IFA_LOCAL]) { - addr->a_local = nla_get_addr(tb[IFA_LOCAL], addr->a_family); - if (!addr->a_local) - goto errout_free; - addr->a_mask |= ADDR_ATTR_LOCAL; - } - - if (tb[IFA_ADDRESS]) { - struct nl_addr *a; - - a = nla_get_addr(tb[IFA_ADDRESS], addr->a_family); - if (!a) - goto errout_free; - - /* IPv6 sends the local address as IFA_ADDRESS with - * no IFA_LOCAL, IPv4 sends both IFA_LOCAL and IFA_ADDRESS - * with IFA_ADDRESS being the peer address if they differ */ - if (!tb[IFA_LOCAL] || !nl_addr_cmp(a, addr->a_local)) { - nl_addr_put(addr->a_local); - addr->a_local = a; - addr->a_mask |= ADDR_ATTR_LOCAL; - } else { - addr->a_peer = a; - addr->a_mask |= ADDR_ATTR_PEER; - peer_prefix = 1; - } - } - - nl_addr_set_prefixlen(peer_prefix ? addr->a_peer : addr->a_local, - addr->a_prefixlen); - - if (tb[IFA_BROADCAST]) { - addr->a_bcast = nla_get_addr(tb[IFA_BROADCAST], addr->a_family); - if (!addr->a_bcast) - goto errout_free; - - addr->a_mask |= ADDR_ATTR_BROADCAST; - } - - if (tb[IFA_ANYCAST]) { - addr->a_anycast = nla_get_addr(tb[IFA_ANYCAST], addr->a_family); - if (!addr->a_anycast) - goto errout_free; - - addr->a_mask |= ADDR_ATTR_ANYCAST; - } - - if (tb[IFA_MULTICAST]) { - addr->a_multicast = nla_get_addr(tb[IFA_MULTICAST], - addr->a_family); - if (!addr->a_multicast) - goto errout_free; - - addr->a_mask |= ADDR_ATTR_MULTICAST; - } - - err = pp->pp_cb((struct nl_object *) addr, pp); - if (err < 0) - goto errout_free; - - return P_ACCEPT; - -errout_free: - rtnl_addr_free(addr); -errout: - return err; -} - -static int addr_request_update(struct nl_cache *cache, struct nl_handle *handle) -{ - return nl_rtgen_request(handle, RTM_GETADDR, AF_UNSPEC, NLM_F_DUMP); -} - -static int addr_dump_brief(struct nl_object *obj, struct nl_dump_params *p) -{ - struct rtnl_addr *addr = (struct rtnl_addr *) obj; - struct nl_cache *link_cache; - char buf[128]; - - link_cache = nl_cache_mngt_require("route/link"); - - if (addr->a_mask & ADDR_ATTR_LOCAL) - dp_dump(p, "%s", - nl_addr2str(addr->a_local, buf, sizeof(buf))); - else - dp_dump(p, "none"); - - if (addr->a_mask & ADDR_ATTR_PEER) - dp_dump(p, " peer %s", - nl_addr2str(addr->a_peer, buf, sizeof(buf))); - - dp_dump(p, " %s ", nl_af2str(addr->a_family, buf, sizeof(buf))); - - if (link_cache) - dp_dump(p, "dev %s ", - rtnl_link_i2name(link_cache, addr->a_ifindex, - buf, sizeof(buf))); - else - dp_dump(p, "dev %d ", addr->a_ifindex); - - dp_dump(p, "scope %s", - rtnl_scope2str(addr->a_scope, buf, sizeof(buf))); - - rtnl_addr_flags2str(addr->a_flags, buf, sizeof(buf)); - if (buf[0]) - dp_dump(p, " <%s>", buf); - - dp_dump(p, "\n"); - - return 1; -} - -static int addr_dump_full(struct nl_object *obj, struct nl_dump_params *p) -{ - struct rtnl_addr *addr = (struct rtnl_addr *) obj; - int line = addr_dump_brief(obj, p); - char buf[128]; - - if (addr->a_mask & (ADDR_ATTR_LABEL | ADDR_ATTR_BROADCAST | - ADDR_ATTR_ANYCAST | ADDR_ATTR_MULTICAST)) { - dp_dump_line(p, line++, " "); - - if (addr->a_mask & ADDR_ATTR_LABEL) - dp_dump(p, " label %s", addr->a_label); - - if (addr->a_mask & ADDR_ATTR_BROADCAST) - dp_dump(p, " broadcast %s", - nl_addr2str(addr->a_bcast, buf, sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_ANYCAST) - dp_dump(p, " anycast %s", - nl_addr2str(addr->a_anycast, buf, - sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_MULTICAST) - dp_dump(p, " multicast %s", - nl_addr2str(addr->a_multicast, buf, - sizeof(buf))); - - dp_dump(p, "\n"); - } - - if (addr->a_mask & ADDR_ATTR_CACHEINFO) { - struct rtnl_addr_cacheinfo *ci = &addr->a_cacheinfo; - - dp_dump_line(p, line++, " valid-lifetime %s", - ci->aci_valid == 0xFFFFFFFFU ? "forever" : - nl_msec2str(ci->aci_valid * 1000, - buf, sizeof(buf))); - - dp_dump(p, " preferred-lifetime %s\n", - ci->aci_prefered == 0xFFFFFFFFU ? "forever" : - nl_msec2str(ci->aci_prefered * 1000, - buf, sizeof(buf))); - - dp_dump_line(p, line++, " created boot-time+%s ", - nl_msec2str(addr->a_cacheinfo.aci_cstamp * 10, - buf, sizeof(buf))); - - dp_dump(p, "last-updated boot-time+%s\n", - nl_msec2str(addr->a_cacheinfo.aci_tstamp * 10, - buf, sizeof(buf))); - } - - return line; -} - -static int addr_dump_stats(struct nl_object *obj, struct nl_dump_params *p) -{ - return addr_dump_full(obj, p); -} - -static int addr_dump_xml(struct nl_object *obj, struct nl_dump_params *p) -{ - struct rtnl_addr *addr = (struct rtnl_addr *) obj; - struct nl_cache *link_cache; - char buf[128]; - int line = 0; - - dp_dump_line(p, line++, "
\n"); - dp_dump_line(p, line++, " %s\n", - nl_af2str(addr->a_family, buf, sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_LOCAL) - dp_dump_line(p, line++, " %s\n", - nl_addr2str(addr->a_local, buf, sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_PEER) - dp_dump_line(p, line++, " %s\n", - nl_addr2str(addr->a_peer, buf, sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_BROADCAST) - dp_dump_line(p, line++, " %s\n", - nl_addr2str(addr->a_bcast, buf, sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_ANYCAST) - dp_dump_line(p, line++, " %s\n", - nl_addr2str(addr->a_anycast, buf, sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_MULTICAST) - dp_dump_line(p, line++, " %s\n", - nl_addr2str(addr->a_multicast, buf, - sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_PREFIXLEN) - dp_dump_line(p, line++, " %u\n", - addr->a_prefixlen); - link_cache = nl_cache_mngt_require("route/link"); - - if (link_cache) - dp_dump_line(p, line++, " %s\n", - rtnl_link_i2name(link_cache, addr->a_ifindex, - buf, sizeof(buf))); - else - dp_dump_line(p, line++, " %u\n", - addr->a_ifindex); - - if (addr->a_mask & ADDR_ATTR_SCOPE) - dp_dump_line(p, line++, " %s\n", - rtnl_scope2str(addr->a_scope, buf, sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_LABEL) - dp_dump_line(p, line++, " \n", addr->a_label); - - rtnl_addr_flags2str(addr->a_flags, buf, sizeof(buf)); - if (buf[0]) - dp_dump_line(p, line++, " %s\n", buf); - - if (addr->a_mask & ADDR_ATTR_CACHEINFO) { - struct rtnl_addr_cacheinfo *ci = &addr->a_cacheinfo; - - dp_dump_line(p, line++, " \n"); - - dp_dump_line(p, line++, " %s\n", - ci->aci_valid == 0xFFFFFFFFU ? "forever" : - nl_msec2str(ci->aci_valid * 1000, - buf, sizeof(buf))); - - dp_dump_line(p, line++, " %s\n", - ci->aci_prefered == 0xFFFFFFFFU ? "forever" : - nl_msec2str(ci->aci_prefered * 1000, - buf, sizeof(buf))); - - dp_dump_line(p, line++, " %s\n", - nl_msec2str(addr->a_cacheinfo.aci_cstamp * 10, - buf, sizeof(buf))); - - dp_dump_line(p, line++, " %s\n", - nl_msec2str(addr->a_cacheinfo.aci_tstamp * 10, - buf, sizeof(buf))); - - dp_dump_line(p, line++, " \n"); - } - - dp_dump_line(p, line++, "
\n"); - - return line; -} - -static int addr_dump_env(struct nl_object *obj, struct nl_dump_params *p) -{ - struct rtnl_addr *addr = (struct rtnl_addr *) obj; - struct nl_cache *link_cache; - char buf[128]; - int line = 0; - - dp_dump_line(p, line++, "ADDR_FAMILY=%s\n", - nl_af2str(addr->a_family, buf, sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_LOCAL) - dp_dump_line(p, line++, "ADDR_LOCAL=%s\n", - nl_addr2str(addr->a_local, buf, sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_PEER) - dp_dump_line(p, line++, "ADDR_PEER=%s\n", - nl_addr2str(addr->a_peer, buf, sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_BROADCAST) - dp_dump_line(p, line++, "ADDR_BROADCAST=%s\n", - nl_addr2str(addr->a_bcast, buf, sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_ANYCAST) - dp_dump_line(p, line++, "ADDR_ANYCAST=%s\n", - nl_addr2str(addr->a_anycast, buf, sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_MULTICAST) - dp_dump_line(p, line++, "ADDR_MULTICAST=%s\n", - nl_addr2str(addr->a_multicast, buf, - sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_PREFIXLEN) - dp_dump_line(p, line++, "ADDR_PREFIXLEN=%u\n", - addr->a_prefixlen); - link_cache = nl_cache_mngt_require("route/link"); - - dp_dump_line(p, line++, "ADDR_IFINDEX=%u\n", addr->a_ifindex); - if (link_cache) - dp_dump_line(p, line++, "ADDR_IFNAME=%s\n", - rtnl_link_i2name(link_cache, addr->a_ifindex, - buf, sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_SCOPE) - dp_dump_line(p, line++, "ADDR_SCOPE=%s\n", - rtnl_scope2str(addr->a_scope, buf, sizeof(buf))); - - if (addr->a_mask & ADDR_ATTR_LABEL) - dp_dump_line(p, line++, "ADDR_LABEL=%s\n", addr->a_label); - - rtnl_addr_flags2str(addr->a_flags, buf, sizeof(buf)); - if (buf[0]) - dp_dump_line(p, line++, "ADDR_FLAGS=%s\n", buf); - - if (addr->a_mask & ADDR_ATTR_CACHEINFO) { - struct rtnl_addr_cacheinfo *ci = &addr->a_cacheinfo; - - dp_dump_line(p, line++, "ADDR_CACHEINFO_VALID=%s\n", - ci->aci_valid == 0xFFFFFFFFU ? "forever" : - nl_msec2str(ci->aci_valid * 1000, - buf, sizeof(buf))); - - dp_dump_line(p, line++, "ADDR_CACHEINFO_PREFERED=%s\n", - ci->aci_prefered == 0xFFFFFFFFU ? "forever" : - nl_msec2str(ci->aci_prefered * 1000, - buf, sizeof(buf))); - - dp_dump_line(p, line++, "ADDR_CACHEINFO_CREATED=%s\n", - nl_msec2str(addr->a_cacheinfo.aci_cstamp * 10, - buf, sizeof(buf))); - - dp_dump_line(p, line++, "ADDR_CACHEINFO_LASTUPDATE=%s\n", - nl_msec2str(addr->a_cacheinfo.aci_tstamp * 10, - buf, sizeof(buf))); - } - - return line; -} - -static int addr_filter(struct nl_object *obj, struct nl_object *filter) -{ - struct rtnl_addr *o = (struct rtnl_addr *) obj; - struct rtnl_addr *f = (struct rtnl_addr *) filter; - -#define REQ(F) (f->a_mask & ADDR_ATTR_##F) -#define AVAIL(F) (o->a_mask & ADDR_ATTR_##F) -#define _O(F, EXPR) (REQ(F) && (!AVAIL(F) || (EXPR))) -#define _C(F, N) (REQ(F) && (!AVAIL(F) || (o->N != f->N))) - if (_C(IFINDEX, a_ifindex) || - _C(FAMILY, a_family) || - _C(SCOPE, a_scope) || - _O(FLAGS, f->a_flags ^ (o->a_flags & f->a_flag_mask)) || - _O(LABEL, strcmp(o->a_label, f->a_label)) || - _O(PEER, nl_addr_cmp(o->a_peer, f->a_peer)) || - _O(LOCAL, nl_addr_cmp(o->a_local, f->a_local)) || - _O(ANYCAST, nl_addr_cmp(o->a_anycast, f->a_anycast)) || - _O(MULTICAST, nl_addr_cmp(o->a_multicast, f->a_multicast)) || - _O(BROADCAST, nl_addr_cmp(o->a_bcast, f->a_bcast))) - return 0; -#undef REQ -#undef AVAIL -#undef _O -#undef _C - - return 1; -} - -/** - * @name Address Object Creation/Deletion - * @{ - */ - -/** - * Allocate and initialize a new address object - * @note Free the memory after usage using rtnl_addr_put() or rtnl_addr_free(). - * @return Newly allocated address object or NULL if an error occured. - */ -struct rtnl_addr *rtnl_addr_alloc(void) -{ - return (struct rtnl_addr *) nl_object_alloc_from_ops(&rtnl_addr_ops); -} - -/** - * Give back a reference on a address object. - * @arg addr Address object to be given back. - * - * Decrements the reference counter and frees the object if the - * last reference has been released. - */ -void rtnl_addr_put(struct rtnl_addr *addr) -{ - nl_object_put((struct nl_object *) addr); -} - -/** - * Free an address object - * @arg addr Address object to be freed. - * - * @note Always use rtnl_addr_put() unless you're absolutely sure - * that no other user may have a reference on this object. - */ -void rtnl_addr_free(struct rtnl_addr *addr) -{ - nl_object_free((struct nl_object *) addr); -} - -/** @} */ - -/** - * @name Address Cache Management - * @{ - */ - -/** - * Allocate address cache and fill in all configured addresses - * @arg handle Netlink handle. - * - * Allocates a new address cache, initializes it properly and updates it - * to include all addresses currently configured in the kernel. - * - * @note Free the memory after usage. - * @return Newly allocated cache or NULL if an error occured. - */ -struct nl_cache *rtnl_addr_alloc_cache(struct nl_handle *handle) -{ - struct nl_cache *cache; - - cache = nl_cache_alloc_from_ops(&rtnl_addr_ops); - if (!cache) - return NULL; - - if (nl_cache_update(handle, cache) < 0) { - nl_cache_free(cache); - return NULL; - } - - return cache; -} - -/** @} */ - -static struct nl_msg *build_addr_msg(struct rtnl_addr *tmpl, int cmd, int flags) -{ - struct nl_msg *msg; - struct ifaddrmsg am = { - .ifa_family = tmpl->a_family, - .ifa_index = tmpl->a_ifindex, - .ifa_prefixlen = tmpl->a_prefixlen, - }; - - if (tmpl->a_mask & ADDR_ATTR_SCOPE) - am.ifa_scope = tmpl->a_scope; - else { - /* compatibility hack */ - if (tmpl->a_family == AF_INET && - tmpl->a_mask & ADDR_ATTR_LOCAL && - *((char *) nl_addr_get_binary_addr(tmpl->a_local)) == 127) - am.ifa_scope = RT_SCOPE_HOST; - else - am.ifa_scope = RT_SCOPE_UNIVERSE; - } - - msg = nlmsg_build_simple(cmd, flags); - if (!msg) - goto nla_put_failure; - - if (nlmsg_append(msg, &am, sizeof(am), 1) < 0) - goto nla_put_failure; - - if (tmpl->a_mask & ADDR_ATTR_LOCAL) - NLA_PUT_ADDR(msg, IFA_LOCAL, tmpl->a_local); - - if (tmpl->a_mask & ADDR_ATTR_PEER) - NLA_PUT_ADDR(msg, IFA_ADDRESS, tmpl->a_peer); - else - NLA_PUT_ADDR(msg, IFA_ADDRESS, tmpl->a_local); - - if (tmpl->a_mask & ADDR_ATTR_LABEL) - NLA_PUT_STRING(msg, IFA_LABEL, tmpl->a_label); - - if (tmpl->a_mask & ADDR_ATTR_BROADCAST) - NLA_PUT_ADDR(msg, IFA_BROADCAST, tmpl->a_bcast); - - if (tmpl->a_mask & ADDR_ATTR_ANYCAST) - NLA_PUT_ADDR(msg, IFA_ANYCAST, tmpl->a_anycast); - - return msg; - -nla_put_failure: - nlmsg_free(msg); - return NULL; -} - -/** - * @name Address Addition - * @{ - */ - -/** - * Build netlink request message to request addition of new address - * @arg addr Address object representing the new address. - * @arg flags Additional netlink message flags. - * - * Builds a new netlink message requesting the addition of a new - * address. The netlink message header isn't fully equipped with - * all relevant fields and must thus be sent out via nl_send_auto_complete() - * or supplemented as needed. - * - * Minimal required attributes: - * - interface index (rtnl_addr_set_ifindex()) - * - local address (rtnl_addr_set_local()) - * - * The scope will default to universe except for loopback addresses in - * which case a host scope is used if not specified otherwise. - * - * @note Free the memory after usage using nlmsg_free(). - * @return Newly allocated netlink message or NULL if an error occured. - */ -struct nl_msg *rtnl_addr_build_add_request(struct rtnl_addr *addr, int flags) -{ - int required = ADDR_ATTR_IFINDEX | ADDR_ATTR_FAMILY | - ADDR_ATTR_PREFIXLEN | ADDR_ATTR_LOCAL; - - if ((addr->a_mask & required) != required) { - nl_error(EINVAL, "Missing mandatory attributes, required are: " - "ifindex, family, prefixlen, local address."); - return NULL; - } - - return build_addr_msg(addr, RTM_NEWADDR, NLM_F_CREATE | flags); -} - -/** - * Request addition of new address - * @arg handle Netlink handle. - * @arg addr Address object representing the new address. - * @arg flags Additional netlink message flags. - * - * Builds a netlink message by calling rtnl_addr_build_add_request(), - * sends the request to the kernel and waits for the next ACK to be - * received and thus blocks until the request has been fullfilled. - * - * @see rtnl_addr_build_add_request() - * - * @return 0 on sucess or a negative error if an error occured. - */ -int rtnl_addr_add(struct nl_handle *handle, struct rtnl_addr *addr, int flags) -{ - struct nl_msg *msg; - int err; - - msg = rtnl_addr_build_add_request(addr, flags); - if (!msg) - return nl_get_errno(); - - err = nl_send_auto_complete(handle, msg); - nlmsg_free(msg); - if (err < 0) - return err; - - return nl_wait_for_ack(handle); -} - -/** @} */ - -/** - * @name Address Deletion - * @{ - */ - -/** - * Build a netlink request message to request deletion of an address - * @arg addr Address object to be deleteted. - * @arg flags Additional netlink message flags. - * - * Builds a new netlink message requesting a deletion of an address. - * The netlink message header isn't fully equipped with all relevant - * fields and must thus be sent out via nl_send_auto_complete() - * or supplemented as needed. - * - * Minimal required attributes: - * - interface index (rtnl_addr_set_ifindex()) - * - address family (rtnl_addr_set_family()) - * - * Optional attributes: - * - local address (rtnl_addr_set_local()) - * - label (rtnl_addr_set_label(), IPv4/DECnet only) - * - peer address (rtnl_addr_set_peer(), IPv4 only) - * - * @note Free the memory after usage using nlmsg_free(). - * @return Newly allocated netlink message or NULL if an error occured. - */ -struct nl_msg *rtnl_addr_build_delete_request(struct rtnl_addr *addr, int flags) -{ - int required = ADDR_ATTR_IFINDEX | ADDR_ATTR_FAMILY; - - if ((addr->a_mask & required) != required) { - nl_error(EINVAL, "Missing mandatory attributes, required are: " - "ifindex, family"); - return NULL; - } - - return build_addr_msg(addr, RTM_DELADDR, flags); -} - -/** - * Request deletion of an address - * @arg handle Netlink handle. - * @arg addr Address object to be deleted. - * @arg flags Additional netlink message flags. - * - * Builds a netlink message by calling rtnl_addr_build_delete_request(), - * sends the request to the kernel and waits for the next ACK to be - * received and thus blocks until the request has been fullfilled. - * - * @see rtnl_addr_build_delete_request(); - * - * @return 0 on sucess or a negative error if an error occured. - */ -int rtnl_addr_delete(struct nl_handle *handle, struct rtnl_addr *addr, - int flags) -{ - struct nl_msg *msg; - int err; - - msg = rtnl_addr_build_delete_request(addr, flags); - if (!msg) - return nl_get_errno(); - - err = nl_send_auto_complete(handle, msg); - nlmsg_free(msg); - if (err < 0) - return err; - - return nl_wait_for_ack(handle); -} - -/** @} */ - -/** - * @name Attribute Access - * @{ - */ - -/** - * Set label of address object - * @arg addr Address object to be modified. - * @arg label New address label. - * - * @note The maximum size of an address label is IFNAMSIZ. - */ -void rtnl_addr_set_label(struct rtnl_addr *addr, const char *label) -{ - strncpy(addr->a_label, label, sizeof(addr->a_label) - 1); - addr->a_mask |= ADDR_ATTR_LABEL; -} - -/** - * Get label of address object - * @arg addr Address object. - * @return Address label or NULL if not set. - */ -char *rtnl_addr_get_label(struct rtnl_addr *addr) -{ - if (addr->a_mask & ADDR_ATTR_LABEL) - return addr->a_label; - else - return NULL; -} - -/** - * Set interface index of address object - * @arg addr Address object ot be modified. - * @arg ifindex New interface index this address is on. - */ -void rtnl_addr_set_ifindex(struct rtnl_addr *addr, int ifindex) -{ - addr->a_ifindex = ifindex; - addr->a_mask |= ADDR_ATTR_IFINDEX; -} - -/** - * Get interface index of address object - * @arg addr Address object. - * @return Interface index address is on or RTNL_LINK_NOT_FOUND if not set. - */ -int rtnl_addr_get_ifindex(struct rtnl_addr *addr) -{ - if (addr->a_mask & ADDR_ATTR_IFINDEX) - return addr->a_ifindex; - else - return RTNL_LINK_NOT_FOUND; -} - -/** - * Set address family of address object. - * @arg addr Address object to be modified. - * @arg family New address family - * - * @note The address family is set automatically if one of the addresses - * is set and the family hasn't been specified yet. Setting it manually - * can be used to enforce family validation while setting addresses. - */ -void rtnl_addr_set_family(struct rtnl_addr *addr, int family) -{ - addr->a_family = family; - addr->a_mask |= ADDR_ATTR_FAMILY; -} - -/** - * Get address family of address object. - * @arg addr Address object. - * @return Address family or AF_UNSPEC if not set. - */ -int rtnl_addr_get_family(struct rtnl_addr *addr) -{ - if (addr->a_mask & ADDR_ATTR_FAMILY) - return addr->a_family; - else - return AF_UNSPEC; -} - -/** - * Set prefix length of address object. - * @arg addr Address object to be modified. - * @arg prefix New prefix length. - */ -void rtnl_addr_set_prefixlen(struct rtnl_addr *addr, int prefix) -{ - addr->a_prefixlen = prefix; - addr->a_mask |= ADDR_ATTR_PREFIXLEN; -} - -/** - * Get prefix length of address object. - * @arg addr Address object. - * @return Prefix length or a negative number if not set. - */ -int rtnl_addr_get_prefixlen(struct rtnl_addr *addr) -{ - if (addr->a_mask & ADDR_ATTR_PREFIXLEN) - return addr->a_prefixlen; - else - return -1; -} - -/** - * Set scope of address object. - * @arg addr Address object to be modified. - * @arg scope New scope. - */ -void rtnl_addr_set_scope(struct rtnl_addr *addr, int scope) -{ - addr->a_scope = scope; - addr->a_mask |= ADDR_ATTR_SCOPE; -} - -/** - * Get scope of address object. - * @arg addr Address object. - * @return Scope or a negative number if not set. - */ -int rtnl_addr_get_scope(struct rtnl_addr *addr) -{ - if (addr->a_mask & ADDR_ATTR_SCOPE) - return addr->a_scope; - else - return -1; -} - -/** - * Set flags of address object. - * @arg addr Address object to be modified. - * @arg flags Additional flags to set. - * - * @note Existing flags that have been set will not be overwritten. - */ -void rtnl_addr_set_flags(struct rtnl_addr *addr, unsigned int flags) -{ - addr->a_flag_mask |= flags; - addr->a_flags |= flags; - addr->a_mask |= ADDR_ATTR_FLAGS; -} - -/** - * Unset flags of address object. - * @arg addr Address object to be modified. - * @arg flags Flags to unset. - */ -void rtnl_addr_unset_flags(struct rtnl_addr *addr, unsigned int flags) -{ - addr->a_flag_mask |= flags; - addr->a_flags &= ~flags; - addr->a_mask |= ADDR_ATTR_FLAGS; -} - -/** - * Get flags of address object. - * @arg addr Address object. - * @return Flags in form of a bitmask. - */ -unsigned int rtnl_addr_get_flags(struct rtnl_addr *addr) -{ - return addr->a_flags; -} - -static inline int __assign_addr(struct rtnl_addr *addr, struct nl_addr **pos, - struct nl_addr *new, int flag) -{ - if (addr->a_mask & ADDR_ATTR_FAMILY) { - if (new->a_family != addr->a_family) - return nl_error(EINVAL, "Address family mismatch"); - } else - addr->a_family = new->a_family; - - if (*pos) - nl_addr_put(*pos); - - *pos = nl_addr_get(new); - addr->a_mask |= (flag | ADDR_ATTR_FAMILY); - - return 0; -} - -/** - * Set local address of address object. - * @arg addr Address object to be modified. - * @arg local New local address. - * - * Assigns the new local address to the specified address object. The - * address is validated against the address family if set already via - * either rtnl_addr_set_family() or by setting one of the other addresses. - * The assignment fails if the address families mismatch. In case the - * address family has not been specified yet, the address family of the - * new address is elected to be the new requirement. - * - * @note The address may not contain a prefix length if the peer address - * has been specified already. - * - * @return 0 on success or a negative error code. - */ -int rtnl_addr_set_local(struct rtnl_addr *addr, struct nl_addr *local) -{ - int err; - - err = __assign_addr(addr, &addr->a_local, local, ADDR_ATTR_LOCAL); - if (err < 0) - return err; - - if (!(addr->a_mask & ADDR_ATTR_PEER)) { - addr->a_prefixlen = nl_addr_get_prefixlen(addr->a_local); - addr->a_mask |= ADDR_ATTR_PREFIXLEN; - } - - return 0; -} - -/** - * Get local address of address object. - * @arg addr Address object. - * @return Local address or NULL if not set. - */ -struct nl_addr *rtnl_addr_get_local(struct rtnl_addr *addr) -{ - if (addr->a_mask & ADDR_ATTR_LOCAL) - return addr->a_local; - else - return NULL; -} - -/** - * Set peer address of address object. - * @arg addr Address object to be modified. - * @arg peer New peer address. - * - * Assigns the new peer address to the specified address object. The - * address is validated against the address family if set already via - * either rtnl_addr_set_family() or by setting one of the other addresses. - * The assignment fails if the address families mismatch. In case the - * address family has not been specified yet, the address family of this - * new address is elected to be the requirement. - * - * @return 0 on success or a negative error code. - */ -int rtnl_addr_set_peer(struct rtnl_addr *addr, struct nl_addr *peer) -{ - return __assign_addr(addr, &addr->a_peer, peer, ADDR_ATTR_PEER); - - addr->a_prefixlen = nl_addr_get_prefixlen(addr->a_peer); - addr->a_mask |= ADDR_ATTR_PREFIXLEN; - - return 0; -} - -/** - * Get peer address of address object. - * @arg addr Adress object. - * @return Peer address or NULL if not set. - */ -struct nl_addr *rtnl_addr_get_peer(struct rtnl_addr *addr) -{ - if (addr->a_mask & ADDR_ATTR_PEER) - return addr->a_peer; - else - return NULL; -} - -/** - * Set broadcast address of address object. - * @arg addr Address object to be modified. - * @arg bcast New broadcast address. - * - * Assigns the new broadcast address to the specified address object. The - * address is validated against the address family if set already via - * either rtnl_addr_set_family() or by setting one of the other addresses. - * The assignment fails if the address families mismatch. In case the - * address family has not been specified yet, the address family of this - * new address is elected to be the requirement. - * - * @return 0 on success or a negative error code. - */ -int rtnl_addr_set_broadcast(struct rtnl_addr *addr, struct nl_addr *bcast) -{ - return __assign_addr(addr, &addr->a_bcast, bcast, ADDR_ATTR_BROADCAST); -} - -/** - * Get broadcast address of address object. - * @arg addr Address object. - * @return Broadcast address or NULL if not set. - */ -struct nl_addr *rtnl_addr_get_broadcast(struct rtnl_addr *addr) -{ - if (addr->a_mask & ADDR_ATTR_BROADCAST) - return addr->a_bcast; - else - return NULL; -} - -/** - * Set anycast address of address object. - * @arg addr Address object to be modified. - * @arg anycast New anycast address. - * - * Assigns the new anycast address to the specified address object. The - * address is validated against the address family if set already via - * either rtnl_addr_set_family() or by setting one of the other addresses. - * The assignment fails if the address families mismatch. In case the - * address family has not been specified yet, the address family of this - * new address is elected to be the requirement. - * - * @return 0 on success or a negative error code. - */ -int rtnl_addr_set_anycast(struct rtnl_addr *addr, struct nl_addr *anycast) -{ - return __assign_addr(addr, &addr->a_anycast, anycast, - ADDR_ATTR_ANYCAST); -} - -/** - * Get anycast address of address object. - * @arg addr Address object. - * @return Anycast address or NULL if not set. - */ -struct nl_addr *rtnl_addr_get_anycast(struct rtnl_addr *addr) -{ - if (addr->a_mask & ADDR_ATTR_ANYCAST) - return addr->a_anycast; - else - return NULL; -} - -/** - * Set multicast address of address object. - * @arg addr Address object to be modified. - * @arg multicast New multicast address. - * - * Assigns the new multicast address to the specified address object. The - * address is validated against the address family if set already via - * either rtnl_addr_set_family() or by setting one of the other addresses. - * The assignment fails if the address families mismatch. In case the - * address family has not been specified yet, the address family of this - * new address is elected to be the requirement. - * - * @return 0 on success or a negative error code. - */ -int rtnl_addr_set_multicast(struct rtnl_addr *addr, struct nl_addr *multicast) -{ - return __assign_addr(addr, &addr->a_multicast, multicast, - ADDR_ATTR_MULTICAST); -} - -/** - * Get multicast address of address object. - * @arg addr Address object. - * @return Multicast address or NULL if not set. - */ -struct nl_addr *rtnl_addr_get_multicast(struct rtnl_addr *addr) -{ - if (addr->a_mask & ADDR_ATTR_MULTICAST) - return addr->a_multicast; - else - return NULL; -} - -/** @} */ - -/** - * @name Address Flags Translations - * @{ - */ - -static struct trans_tbl addr_flags[] = { - __ADD(IFA_F_SECONDARY, secondary) - __ADD(IFA_F_DEPRECATED, deprecated) - __ADD(IFA_F_TENTATIVE, tentative) - __ADD(IFA_F_PERMANENT, permanent) -}; - -/** - * Convert address flags to character string. - * @arg flags Address flags. - * @arg buf Destination buffer. - * @arg size Size of destination buffer. - * - * Converts address flags to a character string separated by commas and - * stores the resulting character string in the specified destination buffer. - * - * @return Formatted flags as character string. - */ -char *rtnl_addr_flags2str(int flags, char *buf, size_t size) -{ - return __flags2str(flags, buf, size, addr_flags, - ARRAY_SIZE(addr_flags)); -} - -/** - * Convert character string to address flags. - * @arg name Name of address flags. - * - * Converts the provided character string specifying any number of address - * flags separated by commas to the corresponding numeric bitmask. - * - * @return Address flags in form of a bitmask. - */ -int rtnl_addr_str2flags(const char *name) -{ - return __str2flags(name, addr_flags, ARRAY_SIZE(addr_flags)); -} - -/** @} */ - -static struct nl_cache_ops rtnl_addr_ops = { - .co_name = "route/addr", - .co_size = sizeof(struct rtnl_addr), - .co_hdrsize = sizeof(struct ifaddrmsg), - .co_msgtypes = { - { RTM_NEWADDR, "new" }, - { RTM_DELADDR, "delete" }, - { RTM_GETADDR, "get" }, - { -1, NULL }, - }, - .co_protocol = NETLINK_ROUTE, - .co_request_update = addr_request_update, - .co_msg_parser = addr_msg_parser, - .co_free_data = addr_free_data, - .co_dump[NL_DUMP_BRIEF] = addr_dump_brief, - .co_dump[NL_DUMP_FULL] = addr_dump_full, - .co_dump[NL_DUMP_STATS] = addr_dump_stats, - .co_dump[NL_DUMP_XML] = addr_dump_xml, - .co_dump[NL_DUMP_ENV] = addr_dump_env, - .co_filter = addr_filter, -}; - -static void __init addr_init(void) -{ - nl_cache_mngt_register(&rtnl_addr_ops); -} - -static void __exit neigh_exit(void) -{ - nl_cache_mngt_unregister(&rtnl_addr_ops); -} - -/** @} */