| /* SPDX-License-Identifier: LGPL-2.1-only */ |
| /* |
| * Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch> |
| */ |
| |
| /** |
| * @ingroup route |
| * @defgroup route_obj Route Object |
| * |
| * @par Attributes |
| * @code |
| * Name Default |
| * ------------------------------------------------------------- |
| * routing table RT_TABLE_MAIN |
| * scope RT_SCOPE_NOWHERE |
| * tos 0 |
| * protocol RTPROT_STATIC |
| * prio 0 |
| * family AF_UNSPEC |
| * type RTN_UNICAST |
| * iif NULL |
| * @endcode |
| * |
| * @{ |
| */ |
| |
| #include "nl-default.h" |
| |
| #include <linux/in_route.h> |
| |
| #include <netlink/netlink.h> |
| #include <netlink/cache.h> |
| #include <netlink/utils.h> |
| #include <netlink/data.h> |
| #include <netlink/hashtable.h> |
| #include <netlink/route/rtnl.h> |
| #include <netlink/route/route.h> |
| #include <netlink/route/link.h> |
| #include <netlink/route/nexthop.h> |
| |
| #include "nl-route.h" |
| #include "nl-aux-route/nl-route.h" |
| #include "nl-priv-dynamic-core/nl-core.h" |
| #include "nexthop-encap.h" |
| |
| /** @cond SKIP */ |
| struct rtnl_route { |
| NLHDR_COMMON |
| |
| uint8_t rt_family; |
| uint8_t rt_tos; |
| uint8_t rt_protocol; |
| uint8_t rt_scope; |
| uint8_t rt_type; |
| uint8_t rt_nmetrics; |
| uint8_t rt_ttl_propagate; |
| uint32_t rt_flags; |
| struct nl_addr *rt_dst; |
| struct nl_addr *rt_src; |
| uint32_t rt_table; |
| uint32_t rt_iif; |
| uint32_t rt_prio; |
| uint32_t rt_metrics[RTAX_MAX]; |
| uint32_t rt_metrics_mask; |
| uint32_t rt_nr_nh; |
| uint32_t rt_nhid; |
| struct nl_addr *rt_pref_src; |
| struct nl_list_head rt_nexthops; |
| struct rtnl_rtcacheinfo rt_cacheinfo; |
| uint32_t rt_flag_mask; |
| }; |
| |
| #define ROUTE_ATTR_FAMILY 0x000001 |
| #define ROUTE_ATTR_TOS 0x000002 |
| #define ROUTE_ATTR_TABLE 0x000004 |
| #define ROUTE_ATTR_PROTOCOL 0x000008 |
| #define ROUTE_ATTR_SCOPE 0x000010 |
| #define ROUTE_ATTR_TYPE 0x000020 |
| #define ROUTE_ATTR_FLAGS 0x000040 |
| #define ROUTE_ATTR_DST 0x000080 |
| #define ROUTE_ATTR_SRC 0x000100 |
| #define ROUTE_ATTR_IIF 0x000200 |
| #define ROUTE_ATTR_OIF 0x000400 |
| #define ROUTE_ATTR_GATEWAY 0x000800 |
| #define ROUTE_ATTR_PRIO 0x001000 |
| #define ROUTE_ATTR_PREF_SRC 0x002000 |
| #define ROUTE_ATTR_METRICS 0x004000 |
| #define ROUTE_ATTR_MULTIPATH 0x008000 |
| #define ROUTE_ATTR_REALMS 0x010000 |
| #define ROUTE_ATTR_CACHEINFO 0x020000 |
| #define ROUTE_ATTR_TTL_PROPAGATE 0x040000 |
| #define ROUTE_ATTR_NHID 0x080000 |
| /** @endcond */ |
| |
| static void route_constructor(struct nl_object *c) |
| { |
| struct rtnl_route *r = (struct rtnl_route *) c; |
| |
| r->rt_family = AF_UNSPEC; |
| r->rt_scope = RT_SCOPE_NOWHERE; |
| r->rt_table = RT_TABLE_MAIN; |
| r->rt_protocol = RTPROT_STATIC; |
| r->rt_type = RTN_UNICAST; |
| r->rt_prio = 0; |
| |
| nl_init_list_head(&r->rt_nexthops); |
| } |
| |
| static void route_free_data(struct nl_object *c) |
| { |
| struct rtnl_route *r = (struct rtnl_route *) c; |
| struct rtnl_nexthop *nh, *tmp; |
| |
| if (r == NULL) |
| return; |
| |
| nl_addr_put(r->rt_dst); |
| nl_addr_put(r->rt_src); |
| nl_addr_put(r->rt_pref_src); |
| |
| nl_list_for_each_entry_safe(nh, tmp, &r->rt_nexthops, rtnh_list) { |
| rtnl_route_remove_nexthop(r, nh); |
| rtnl_route_nh_free(nh); |
| } |
| } |
| |
| static int route_clone(struct nl_object *_dst, struct nl_object *_src) |
| { |
| struct rtnl_route *dst = (struct rtnl_route *) _dst; |
| struct rtnl_route *src = (struct rtnl_route *) _src; |
| struct rtnl_nexthop *nh, *new; |
| |
| dst->rt_dst = NULL; |
| dst->rt_src = NULL; |
| dst->rt_pref_src = NULL; |
| nl_init_list_head(&dst->rt_nexthops); |
| dst->rt_nr_nh = 0; |
| |
| if (src->rt_dst) { |
| if (!(dst->rt_dst = nl_addr_clone(src->rt_dst))) |
| return -NLE_NOMEM; |
| } |
| |
| if (src->rt_src) { |
| if (!(dst->rt_src = nl_addr_clone(src->rt_src))) |
| return -NLE_NOMEM; |
| } |
| |
| if (src->rt_pref_src) { |
| if (!(dst->rt_pref_src = nl_addr_clone(src->rt_pref_src))) |
| return -NLE_NOMEM; |
| } |
| |
| nl_list_for_each_entry(nh, &src->rt_nexthops, rtnh_list) { |
| new = rtnl_route_nh_clone(nh); |
| if (!new) |
| return -NLE_NOMEM; |
| |
| rtnl_route_add_nexthop(dst, new); |
| } |
| |
| return 0; |
| } |
| |
| static void route_dump_line(struct nl_object *a, struct nl_dump_params *p) |
| { |
| struct rtnl_route *r = (struct rtnl_route *) a; |
| int cache = 0, flags; |
| char buf[64]; |
| |
| if (r->rt_flags & RTM_F_CLONED) |
| cache = 1; |
| |
| nl_dump_line(p, "%s ", nl_af2str(r->rt_family, buf, sizeof(buf))); |
| |
| if (cache) |
| nl_dump(p, "cache "); |
| |
| if (!(r->ce_mask & ROUTE_ATTR_DST) || |
| (nl_addr_get_prefixlen(r->rt_dst) == 0 && |
| nl_addr_get_len(r->rt_dst) > 0 && nl_addr_iszero(r->rt_dst))) |
| nl_dump(p, "default "); |
| else |
| nl_dump(p, "%s ", nl_addr2str(r->rt_dst, buf, sizeof(buf))); |
| |
| if (r->ce_mask & ROUTE_ATTR_TABLE && !cache) |
| nl_dump(p, "table %s ", |
| rtnl_route_table2str(r->rt_table, buf, sizeof(buf))); |
| |
| if (r->ce_mask & ROUTE_ATTR_TYPE) |
| nl_dump(p, "type %s ", |
| nl_rtntype2str(r->rt_type, buf, sizeof(buf))); |
| |
| if (r->ce_mask & ROUTE_ATTR_TOS && r->rt_tos != 0) |
| nl_dump(p, "tos %#x ", r->rt_tos); |
| |
| if (r->ce_mask & ROUTE_ATTR_NHID) |
| nl_dump(p, "nhid %u ", r->rt_nhid); |
| |
| if (r->ce_mask & ROUTE_ATTR_MULTIPATH) { |
| struct rtnl_nexthop *nh; |
| |
| nl_list_for_each_entry(nh, &r->rt_nexthops, rtnh_list) { |
| p->dp_ivar = NH_DUMP_FROM_ONELINE; |
| rtnl_route_nh_dump(nh, p); |
| } |
| } |
| |
| flags = r->rt_flags & ~(RTM_F_CLONED); |
| if (r->ce_mask & ROUTE_ATTR_FLAGS && flags) { |
| |
| nl_dump(p, "<"); |
| |
| #define PRINT_FLAG(f) if (flags & RTNH_F_##f) { \ |
| flags &= ~RTNH_F_##f; nl_dump(p, #f "%s", flags ? "," : ""); } |
| PRINT_FLAG(DEAD); |
| PRINT_FLAG(ONLINK); |
| PRINT_FLAG(PERVASIVE); |
| #undef PRINT_FLAG |
| |
| #define PRINT_FLAG(f) if (flags & RTM_F_##f) { \ |
| flags &= ~RTM_F_##f; nl_dump(p, #f "%s", flags ? "," : ""); } |
| PRINT_FLAG(NOTIFY); |
| PRINT_FLAG(EQUALIZE); |
| PRINT_FLAG(PREFIX); |
| #undef PRINT_FLAG |
| |
| #define PRINT_FLAG(f) if (flags & RTCF_##f) { \ |
| flags &= ~RTCF_##f; nl_dump(p, #f "%s", flags ? "," : ""); } |
| PRINT_FLAG(NOTIFY); |
| PRINT_FLAG(REDIRECTED); |
| PRINT_FLAG(DOREDIRECT); |
| PRINT_FLAG(DIRECTSRC); |
| PRINT_FLAG(DNAT); |
| PRINT_FLAG(BROADCAST); |
| PRINT_FLAG(MULTICAST); |
| PRINT_FLAG(LOCAL); |
| #undef PRINT_FLAG |
| |
| nl_dump(p, ">"); |
| } |
| |
| nl_dump(p, "\n"); |
| } |
| |
| static void route_dump_details(struct nl_object *a, struct nl_dump_params *p) |
| { |
| _nl_auto_nl_cache struct nl_cache *link_cache = NULL; |
| struct rtnl_route *r = (struct rtnl_route *) a; |
| char buf[256]; |
| int i; |
| |
| link_cache = nl_cache_mngt_require_safe("route/link"); |
| |
| route_dump_line(a, p); |
| nl_dump_line(p, " "); |
| |
| if (r->ce_mask & ROUTE_ATTR_PREF_SRC) |
| nl_dump(p, "preferred-src %s ", |
| nl_addr2str(r->rt_pref_src, buf, sizeof(buf))); |
| |
| if (r->ce_mask & ROUTE_ATTR_SCOPE && r->rt_scope != RT_SCOPE_NOWHERE) |
| nl_dump(p, "scope %s ", |
| rtnl_scope2str(r->rt_scope, buf, sizeof(buf))); |
| |
| if (r->ce_mask & ROUTE_ATTR_PRIO) |
| nl_dump(p, "priority %#x ", r->rt_prio); |
| |
| if (r->ce_mask & ROUTE_ATTR_PROTOCOL) |
| nl_dump(p, "protocol %s ", |
| rtnl_route_proto2str(r->rt_protocol, buf, sizeof(buf))); |
| |
| if (r->ce_mask & ROUTE_ATTR_IIF) { |
| if (link_cache) { |
| nl_dump(p, "iif %s ", |
| rtnl_link_i2name(link_cache, r->rt_iif, |
| buf, sizeof(buf))); |
| } else |
| nl_dump(p, "iif %d ", r->rt_iif); |
| } |
| |
| if (r->ce_mask & ROUTE_ATTR_SRC) |
| nl_dump(p, "src %s ", nl_addr2str(r->rt_src, buf, sizeof(buf))); |
| |
| if (r->ce_mask & ROUTE_ATTR_TTL_PROPAGATE) { |
| nl_dump(p, " ttl-propagate %s", |
| r->rt_ttl_propagate ? "enabled" : "disabled"); |
| } |
| |
| if (r->ce_mask & ROUTE_ATTR_NHID) |
| nl_dump(p, "nhid %u ", r->rt_nhid); |
| |
| nl_dump(p, "\n"); |
| |
| if (r->ce_mask & ROUTE_ATTR_MULTIPATH) { |
| struct rtnl_nexthop *nh; |
| |
| nl_list_for_each_entry(nh, &r->rt_nexthops, rtnh_list) { |
| nl_dump_line(p, " "); |
| p->dp_ivar = NH_DUMP_FROM_DETAILS; |
| rtnl_route_nh_dump(nh, p); |
| nl_dump(p, "\n"); |
| } |
| } |
| |
| if ((r->ce_mask & ROUTE_ATTR_CACHEINFO) && r->rt_cacheinfo.rtci_error) { |
| nl_dump_line(p, " cacheinfo error %d (%s)\n", |
| r->rt_cacheinfo.rtci_error, |
| nl_strerror_l(-r->rt_cacheinfo.rtci_error)); |
| } |
| |
| if (r->ce_mask & ROUTE_ATTR_METRICS) { |
| nl_dump_line(p, " metrics ["); |
| for (i = 0; i < RTAX_MAX; i++) |
| if (r->rt_metrics_mask & (1 << i)) |
| nl_dump(p, "%s %u ", |
| rtnl_route_metric2str(i+1, |
| buf, sizeof(buf)), |
| r->rt_metrics[i]); |
| nl_dump(p, "]\n"); |
| } |
| } |
| |
| static void route_dump_stats(struct nl_object *obj, struct nl_dump_params *p) |
| { |
| struct rtnl_route *route = (struct rtnl_route *) obj; |
| |
| route_dump_details(obj, p); |
| |
| if (route->ce_mask & ROUTE_ATTR_CACHEINFO) { |
| struct rtnl_rtcacheinfo *ci = &route->rt_cacheinfo; |
| |
| nl_dump_line(p, " used %u refcnt %u last-use %us " |
| "expires %us\n", |
| ci->rtci_used, ci->rtci_clntref, |
| ci->rtci_last_use / nl_get_user_hz(), |
| ci->rtci_expires / nl_get_user_hz()); |
| } |
| } |
| |
| static void route_keygen(struct nl_object *obj, uint32_t *hashkey, |
| uint32_t table_sz) |
| { |
| struct rtnl_route *route = (struct rtnl_route *) obj; |
| unsigned int rkey_sz; |
| struct nl_addr *addr = NULL; |
| _nl_auto_free struct route_hash_key { |
| uint8_t rt_family; |
| uint8_t rt_tos; |
| uint32_t rt_table; |
| uint32_t rt_prio; |
| char rt_addr[0]; |
| } _nl_packed *rkey = NULL; |
| char buf[INET6_ADDRSTRLEN+5]; |
| |
| if (route->rt_dst) |
| addr = route->rt_dst; |
| |
| rkey_sz = sizeof(*rkey); |
| if (addr) |
| rkey_sz += nl_addr_get_len(addr); |
| rkey = calloc(1, rkey_sz); |
| if (!rkey) { |
| NL_DBG(2, "Warning: calloc failed for %d bytes...\n", rkey_sz); |
| *hashkey = 0; |
| return; |
| } |
| rkey->rt_family = route->rt_family; |
| rkey->rt_tos = route->rt_tos; |
| rkey->rt_table = route->rt_table; |
| rkey->rt_prio = route->rt_prio; |
| if (addr) |
| memcpy(rkey->rt_addr, nl_addr_get_binary_addr(addr), |
| nl_addr_get_len(addr)); |
| |
| *hashkey = nl_hash(rkey, rkey_sz, 0) % table_sz; |
| |
| NL_DBG(5, |
| "route %p key (fam %d tos %d table %d prio %d addr %s) keysz %d hash 0x%x\n", |
| route, rkey->rt_family, rkey->rt_tos, rkey->rt_table, |
| rkey->rt_prio, nl_addr2str(addr, buf, sizeof(buf)), rkey_sz, |
| *hashkey); |
| |
| return; |
| } |
| |
| static uint32_t route_id_attrs_get(struct nl_object *obj) |
| { |
| struct rtnl_route *route = (struct rtnl_route *)obj; |
| struct nl_object_ops *ops = obj->ce_ops; |
| uint32_t rv = ops->oo_id_attrs; |
| |
| /* MPLS address family does not allow RTA_PRIORITY to be set */ |
| if (route->rt_family == AF_MPLS) |
| rv &= ~ROUTE_ATTR_PRIO; |
| |
| return rv; |
| } |
| |
| static uint64_t route_compare(struct nl_object *_a, struct nl_object *_b, |
| uint64_t attrs, int flags) |
| { |
| struct rtnl_route *a = (struct rtnl_route *) _a; |
| struct rtnl_route *b = (struct rtnl_route *) _b; |
| struct rtnl_nexthop *nh_a, *nh_b; |
| int i, found; |
| uint64_t diff = 0; |
| |
| #define _DIFF(ATTR, EXPR) ATTR_DIFF(attrs, ATTR, a, b, EXPR) |
| diff |= _DIFF(ROUTE_ATTR_FAMILY, a->rt_family != b->rt_family); |
| diff |= _DIFF(ROUTE_ATTR_TOS, a->rt_tos != b->rt_tos); |
| diff |= _DIFF(ROUTE_ATTR_TABLE, a->rt_table != b->rt_table); |
| diff |= _DIFF(ROUTE_ATTR_PROTOCOL, a->rt_protocol != b->rt_protocol); |
| diff |= _DIFF(ROUTE_ATTR_SCOPE, a->rt_scope != b->rt_scope); |
| diff |= _DIFF(ROUTE_ATTR_TYPE, a->rt_type != b->rt_type); |
| diff |= _DIFF(ROUTE_ATTR_PRIO, a->rt_prio != b->rt_prio); |
| diff |= _DIFF(ROUTE_ATTR_DST, nl_addr_cmp(a->rt_dst, b->rt_dst)); |
| diff |= _DIFF(ROUTE_ATTR_SRC, nl_addr_cmp(a->rt_src, b->rt_src)); |
| diff |= _DIFF(ROUTE_ATTR_IIF, a->rt_iif != b->rt_iif); |
| diff |= _DIFF(ROUTE_ATTR_PREF_SRC, |
| nl_addr_cmp(a->rt_pref_src, b->rt_pref_src)); |
| diff |= _DIFF(ROUTE_ATTR_TTL_PROPAGATE, |
| a->rt_ttl_propagate != b->rt_ttl_propagate); |
| diff |= _DIFF(ROUTE_ATTR_NHID, a->rt_nhid != b->rt_nhid); |
| |
| if (flags & LOOSE_COMPARISON) { |
| nl_list_for_each_entry(nh_b, &b->rt_nexthops, rtnh_list) { |
| found = 0; |
| nl_list_for_each_entry(nh_a, &a->rt_nexthops, |
| rtnh_list) { |
| if (!rtnl_route_nh_compare(nh_a, nh_b, |
| nh_b->ce_mask, 1)) { |
| found = 1; |
| break; |
| } |
| } |
| |
| if (!found) |
| goto nh_mismatch; |
| } |
| |
| for (i = 0; i < RTAX_MAX - 1; i++) { |
| if (a->rt_metrics_mask & (1 << i) && |
| (!(b->rt_metrics_mask & (1 << i)) || |
| a->rt_metrics[i] != b->rt_metrics[i])) |
| diff |= _DIFF(ROUTE_ATTR_METRICS, 1); |
| } |
| |
| diff |= _DIFF(ROUTE_ATTR_FLAGS, |
| (a->rt_flags ^ b->rt_flags) & b->rt_flag_mask); |
| } else { |
| if (a->rt_nr_nh != b->rt_nr_nh) |
| goto nh_mismatch; |
| |
| /* search for a dup in each nh of a */ |
| nl_list_for_each_entry(nh_a, &a->rt_nexthops, rtnh_list) { |
| found = 0; |
| nl_list_for_each_entry(nh_b, &b->rt_nexthops, |
| rtnh_list) { |
| if (rtnl_route_nh_identical(nh_a, nh_b)) { |
| found = 1; |
| break; |
| } |
| } |
| if (!found) |
| goto nh_mismatch; |
| } |
| |
| /* search for a dup in each nh of b, covers case where a has |
| * dupes itself */ |
| nl_list_for_each_entry(nh_b, &b->rt_nexthops, rtnh_list) { |
| found = 0; |
| nl_list_for_each_entry(nh_a, &a->rt_nexthops, |
| rtnh_list) { |
| if (rtnl_route_nh_identical(nh_a, nh_b)) { |
| found = 1; |
| break; |
| } |
| } |
| if (!found) |
| goto nh_mismatch; |
| } |
| |
| for (i = 0; i < RTAX_MAX - 1; i++) { |
| if ((a->rt_metrics_mask & (1 << i)) ^ |
| (b->rt_metrics_mask & (1 << i))) |
| diff |= _DIFF(ROUTE_ATTR_METRICS, 1); |
| else |
| diff |= _DIFF(ROUTE_ATTR_METRICS, |
| a->rt_metrics[i] != b->rt_metrics[i]); |
| } |
| |
| diff |= _DIFF(ROUTE_ATTR_FLAGS, a->rt_flags != b->rt_flags); |
| } |
| |
| out: |
| return diff; |
| |
| nh_mismatch: |
| diff |= _DIFF(ROUTE_ATTR_MULTIPATH, 1); |
| goto out; |
| #undef _DIFF |
| } |
| |
| static int route_update(struct nl_object *old_obj, struct nl_object *new_obj) |
| { |
| struct rtnl_route *new_route = (struct rtnl_route *) new_obj; |
| struct rtnl_route *old_route = (struct rtnl_route *) old_obj; |
| struct rtnl_nexthop *new_nh; |
| int action = new_obj->ce_msgtype; |
| char buf[INET6_ADDRSTRLEN+5]; |
| |
| /* |
| * ipv6 ECMP route notifications from the kernel come as |
| * separate notifications, one for every nexthop. This update |
| * function collapses such route msgs into a single |
| * route with multiple nexthops. The resulting object looks |
| * similar to a ipv4 ECMP route |
| */ |
| if (new_route->rt_family != AF_INET6 || |
| new_route->rt_table == RT_TABLE_LOCAL) |
| return -NLE_OPNOTSUPP; |
| |
| /* |
| * For routes that are already multipath, |
| * or dont have a nexthop dont do anything |
| */ |
| if (rtnl_route_get_nnexthops(new_route) != 1) |
| return -NLE_OPNOTSUPP; |
| |
| /* |
| * Get the only nexthop entry from the new route. For |
| * IPv6 we always get a route with a 0th NH |
| * filled or nothing at all |
| */ |
| new_nh = rtnl_route_nexthop_n(new_route, 0); |
| if (!new_nh || !rtnl_route_nh_get_gateway(new_nh)) |
| return -NLE_OPNOTSUPP; |
| |
| switch(action) { |
| case RTM_NEWROUTE : { |
| struct rtnl_nexthop *cloned_nh; |
| struct rtnl_nexthop *old_nh; |
| |
| /* |
| * Do not add the nexthop to old route if it was already added before |
| */ |
| nl_list_for_each_entry(old_nh, &old_route->rt_nexthops, rtnh_list) { |
| if (rtnl_route_nh_identical(old_nh, new_nh)) { |
| return 0; |
| } |
| } |
| |
| /* |
| * Add the nexthop to old route |
| */ |
| cloned_nh = rtnl_route_nh_clone(new_nh); |
| if (!cloned_nh) |
| return -NLE_NOMEM; |
| rtnl_route_add_nexthop(old_route, cloned_nh); |
| |
| NL_DBG(2, "Route obj %p updated. Added " |
| "nexthop %p via %s\n", old_route, cloned_nh, |
| nl_addr2str(cloned_nh->rtnh_gateway, buf, |
| sizeof(buf))); |
| } |
| break; |
| case RTM_DELROUTE : { |
| struct rtnl_nexthop *old_nh; |
| |
| /* |
| * Only take care of nexthop deletes and not |
| * route deletes. So, if there is only one nexthop |
| * quite likely we did not update it. So dont do |
| * anything and return |
| */ |
| if (rtnl_route_get_nnexthops(old_route) <= 1) |
| return -NLE_OPNOTSUPP; |
| |
| /* |
| * Find the next hop in old route and delete it |
| */ |
| nl_list_for_each_entry(old_nh, &old_route->rt_nexthops, |
| rtnh_list) { |
| if (rtnl_route_nh_identical(old_nh, new_nh)) { |
| |
| rtnl_route_remove_nexthop(old_route, old_nh); |
| |
| NL_DBG(2, "Route obj %p updated. Removed " |
| "nexthop %p via %s\n", old_route, |
| old_nh, |
| nl_addr2str(old_nh->rtnh_gateway, buf, |
| sizeof(buf))); |
| |
| rtnl_route_nh_free(old_nh); |
| break; |
| } |
| } |
| } |
| break; |
| default: |
| NL_DBG(2, "Unknown action associated " |
| "to object %p during route update\n", new_obj); |
| return -NLE_OPNOTSUPP; |
| } |
| |
| return NLE_SUCCESS; |
| } |
| |
| static const struct trans_tbl route_attrs[] = { |
| __ADD(ROUTE_ATTR_FAMILY, family), |
| __ADD(ROUTE_ATTR_TOS, tos), |
| __ADD(ROUTE_ATTR_TABLE, table), |
| __ADD(ROUTE_ATTR_PROTOCOL, protocol), |
| __ADD(ROUTE_ATTR_SCOPE, scope), |
| __ADD(ROUTE_ATTR_TYPE, type), |
| __ADD(ROUTE_ATTR_FLAGS, flags), |
| __ADD(ROUTE_ATTR_DST, dst), |
| __ADD(ROUTE_ATTR_SRC, src), |
| __ADD(ROUTE_ATTR_IIF, iif), |
| __ADD(ROUTE_ATTR_OIF, oif), |
| __ADD(ROUTE_ATTR_GATEWAY, gateway), |
| __ADD(ROUTE_ATTR_PRIO, prio), |
| __ADD(ROUTE_ATTR_PREF_SRC, pref_src), |
| __ADD(ROUTE_ATTR_METRICS, metrics), |
| __ADD(ROUTE_ATTR_MULTIPATH, multipath), |
| __ADD(ROUTE_ATTR_REALMS, realms), |
| __ADD(ROUTE_ATTR_CACHEINFO, cacheinfo), |
| __ADD(ROUTE_ATTR_TTL_PROPAGATE, ttl_propagate), |
| __ADD(ROUTE_ATTR_NHID, nhid), |
| }; |
| |
| static char *route_attrs2str(int attrs, char *buf, size_t len) |
| { |
| return __flags2str(attrs, buf, len, route_attrs, |
| ARRAY_SIZE(route_attrs)); |
| } |
| |
| /** |
| * @name Allocation/Freeing |
| * @{ |
| */ |
| |
| struct rtnl_route *rtnl_route_alloc(void) |
| { |
| return (struct rtnl_route *) nl_object_alloc(&route_obj_ops); |
| } |
| |
| void rtnl_route_get(struct rtnl_route *route) |
| { |
| nl_object_get((struct nl_object *) route); |
| } |
| |
| void rtnl_route_put(struct rtnl_route *route) |
| { |
| nl_object_put((struct nl_object *) route); |
| } |
| |
| /** @} */ |
| |
| /** |
| * @name Attributes |
| * @{ |
| */ |
| |
| void rtnl_route_set_table(struct rtnl_route *route, uint32_t table) |
| { |
| route->rt_table = table; |
| route->ce_mask |= ROUTE_ATTR_TABLE; |
| } |
| |
| uint32_t rtnl_route_get_table(struct rtnl_route *route) |
| { |
| return route->rt_table; |
| } |
| |
| void rtnl_route_set_scope(struct rtnl_route *route, uint8_t scope) |
| { |
| route->rt_scope = scope; |
| route->ce_mask |= ROUTE_ATTR_SCOPE; |
| } |
| |
| uint8_t rtnl_route_get_scope(struct rtnl_route *route) |
| { |
| return route->rt_scope; |
| } |
| |
| void rtnl_route_set_tos(struct rtnl_route *route, uint8_t tos) |
| { |
| route->rt_tos = tos; |
| route->ce_mask |= ROUTE_ATTR_TOS; |
| } |
| |
| uint8_t rtnl_route_get_tos(struct rtnl_route *route) |
| { |
| return route->rt_tos; |
| } |
| |
| void rtnl_route_set_protocol(struct rtnl_route *route, uint8_t protocol) |
| { |
| route->rt_protocol = protocol; |
| route->ce_mask |= ROUTE_ATTR_PROTOCOL; |
| } |
| |
| uint8_t rtnl_route_get_protocol(struct rtnl_route *route) |
| { |
| return route->rt_protocol; |
| } |
| |
| void rtnl_route_set_priority(struct rtnl_route *route, uint32_t prio) |
| { |
| route->rt_prio = prio; |
| route->ce_mask |= ROUTE_ATTR_PRIO; |
| } |
| |
| uint32_t rtnl_route_get_priority(struct rtnl_route *route) |
| { |
| return route->rt_prio; |
| } |
| |
| int rtnl_route_set_family(struct rtnl_route *route, uint8_t family) |
| { |
| switch(family) { |
| case AF_INET: |
| case AF_INET6: |
| case AF_DECnet: |
| case AF_MPLS: |
| route->rt_family = family; |
| route->ce_mask |= ROUTE_ATTR_FAMILY; |
| return 0; |
| } |
| |
| return -NLE_AF_NOSUPPORT; |
| } |
| |
| uint8_t rtnl_route_get_family(struct rtnl_route *route) |
| { |
| return route->rt_family; |
| } |
| |
| int rtnl_route_set_dst(struct rtnl_route *route, struct nl_addr *addr) |
| { |
| if (route->ce_mask & ROUTE_ATTR_FAMILY) { |
| if (addr->a_family != route->rt_family) |
| return -NLE_AF_MISMATCH; |
| } else |
| route->rt_family = addr->a_family; |
| |
| if (route->rt_dst) |
| nl_addr_put(route->rt_dst); |
| |
| nl_addr_get(addr); |
| route->rt_dst = addr; |
| |
| route->ce_mask |= (ROUTE_ATTR_DST | ROUTE_ATTR_FAMILY); |
| |
| return 0; |
| } |
| |
| struct nl_addr *rtnl_route_get_dst(struct rtnl_route *route) |
| { |
| return route->rt_dst; |
| } |
| |
| int rtnl_route_set_src(struct rtnl_route *route, struct nl_addr *addr) |
| { |
| if (addr->a_family == AF_INET) |
| return -NLE_SRCRT_NOSUPPORT; |
| |
| if (route->ce_mask & ROUTE_ATTR_FAMILY) { |
| if (addr->a_family != route->rt_family) |
| return -NLE_AF_MISMATCH; |
| } else |
| route->rt_family = addr->a_family; |
| |
| if (route->rt_src) |
| nl_addr_put(route->rt_src); |
| |
| nl_addr_get(addr); |
| route->rt_src = addr; |
| route->ce_mask |= (ROUTE_ATTR_SRC | ROUTE_ATTR_FAMILY); |
| |
| return 0; |
| } |
| |
| struct nl_addr *rtnl_route_get_src(struct rtnl_route *route) |
| { |
| return route->rt_src; |
| } |
| |
| int rtnl_route_set_type(struct rtnl_route *route, uint8_t type) |
| { |
| if (type > RTN_MAX) |
| return -NLE_RANGE; |
| |
| route->rt_type = type; |
| route->ce_mask |= ROUTE_ATTR_TYPE; |
| |
| return 0; |
| } |
| |
| uint8_t rtnl_route_get_type(struct rtnl_route *route) |
| { |
| return route->rt_type; |
| } |
| |
| void rtnl_route_set_flags(struct rtnl_route *route, uint32_t flags) |
| { |
| route->rt_flag_mask |= flags; |
| route->rt_flags |= flags; |
| route->ce_mask |= ROUTE_ATTR_FLAGS; |
| } |
| |
| void rtnl_route_unset_flags(struct rtnl_route *route, uint32_t flags) |
| { |
| route->rt_flag_mask |= flags; |
| route->rt_flags &= ~flags; |
| route->ce_mask |= ROUTE_ATTR_FLAGS; |
| } |
| |
| uint32_t rtnl_route_get_flags(struct rtnl_route *route) |
| { |
| return route->rt_flags; |
| } |
| |
| int rtnl_route_set_metric(struct rtnl_route *route, int metric, uint32_t value) |
| { |
| if (metric > RTAX_MAX || metric < 1) |
| return -NLE_RANGE; |
| |
| route->rt_metrics[metric - 1] = value; |
| |
| if (!(route->rt_metrics_mask & (1 << (metric - 1)))) { |
| route->rt_nmetrics++; |
| route->rt_metrics_mask |= (1 << (metric - 1)); |
| } |
| |
| route->ce_mask |= ROUTE_ATTR_METRICS; |
| |
| return 0; |
| } |
| |
| int rtnl_route_unset_metric(struct rtnl_route *route, int metric) |
| { |
| if (metric > RTAX_MAX || metric < 1) |
| return -NLE_RANGE; |
| |
| if (route->rt_metrics_mask & (1 << (metric - 1))) { |
| route->rt_nmetrics--; |
| route->rt_metrics_mask &= ~(1 << (metric - 1)); |
| } |
| |
| return 0; |
| } |
| |
| int rtnl_route_get_metric(struct rtnl_route *route, int metric, uint32_t *value) |
| { |
| if (metric > RTAX_MAX || metric < 1) |
| return -NLE_RANGE; |
| |
| if (!(route->rt_metrics_mask & (1 << (metric - 1)))) |
| return -NLE_OBJ_NOTFOUND; |
| |
| if (value) |
| *value = route->rt_metrics[metric - 1]; |
| |
| return 0; |
| } |
| |
| int rtnl_route_set_pref_src(struct rtnl_route *route, struct nl_addr *addr) |
| { |
| if (route->ce_mask & ROUTE_ATTR_FAMILY) { |
| if (addr->a_family != route->rt_family) |
| return -NLE_AF_MISMATCH; |
| } else |
| route->rt_family = addr->a_family; |
| |
| if (route->rt_pref_src) |
| nl_addr_put(route->rt_pref_src); |
| |
| nl_addr_get(addr); |
| route->rt_pref_src = addr; |
| route->ce_mask |= (ROUTE_ATTR_PREF_SRC | ROUTE_ATTR_FAMILY); |
| |
| return 0; |
| } |
| |
| struct nl_addr *rtnl_route_get_pref_src(struct rtnl_route *route) |
| { |
| return route->rt_pref_src; |
| } |
| |
| void rtnl_route_set_iif(struct rtnl_route *route, int ifindex) |
| { |
| route->rt_iif = ifindex; |
| route->ce_mask |= ROUTE_ATTR_IIF; |
| } |
| |
| int rtnl_route_get_iif(struct rtnl_route *route) |
| { |
| return route->rt_iif; |
| } |
| |
| void rtnl_route_add_nexthop(struct rtnl_route *route, struct rtnl_nexthop *nh) |
| { |
| nl_list_add_tail(&nh->rtnh_list, &route->rt_nexthops); |
| route->rt_nr_nh++; |
| route->ce_mask |= ROUTE_ATTR_MULTIPATH; |
| } |
| |
| void rtnl_route_remove_nexthop(struct rtnl_route *route, struct rtnl_nexthop *nh) |
| { |
| if (route->ce_mask & ROUTE_ATTR_MULTIPATH) { |
| route->rt_nr_nh--; |
| nl_list_del(&nh->rtnh_list); |
| } |
| } |
| |
| struct nl_list_head *rtnl_route_get_nexthops(struct rtnl_route *route) |
| { |
| if (route->ce_mask & ROUTE_ATTR_MULTIPATH) |
| return &route->rt_nexthops; |
| |
| return NULL; |
| } |
| |
| int rtnl_route_get_nnexthops(struct rtnl_route *route) |
| { |
| if (route->ce_mask & ROUTE_ATTR_MULTIPATH) |
| return route->rt_nr_nh; |
| |
| return 0; |
| } |
| |
| void rtnl_route_foreach_nexthop(struct rtnl_route *r, |
| void (*cb)(struct rtnl_nexthop *, void *), |
| void *arg) |
| { |
| struct rtnl_nexthop *nh; |
| |
| if (r->ce_mask & ROUTE_ATTR_MULTIPATH) { |
| nl_list_for_each_entry(nh, &r->rt_nexthops, rtnh_list) { |
| cb(nh, arg); |
| } |
| } |
| } |
| |
| struct rtnl_nexthop *rtnl_route_nexthop_n(struct rtnl_route *r, int n) |
| { |
| struct rtnl_nexthop *nh; |
| |
| if (r->ce_mask & ROUTE_ATTR_MULTIPATH && n >= 0 && |
| ((unsigned)n) < r->rt_nr_nh) { |
| int i; |
| |
| i = 0; |
| nl_list_for_each_entry(nh, &r->rt_nexthops, rtnh_list) { |
| if (i == n) return nh; |
| i++; |
| } |
| } |
| return NULL; |
| } |
| |
| void rtnl_route_set_ttl_propagate(struct rtnl_route *route, uint8_t ttl_prop) |
| { |
| route->rt_ttl_propagate = ttl_prop; |
| route->ce_mask |= ROUTE_ATTR_TTL_PROPAGATE; |
| } |
| |
| int rtnl_route_get_ttl_propagate(struct rtnl_route *route) |
| { |
| if (!route) |
| return -NLE_INVAL; |
| if (!(route->ce_mask & ROUTE_ATTR_TTL_PROPAGATE)) |
| return -NLE_MISSING_ATTR; |
| return route->rt_ttl_propagate; |
| } |
| |
| void rtnl_route_set_nhid(struct rtnl_route *route, uint32_t nhid) |
| { |
| route->rt_nhid = nhid; |
| |
| if (nhid > 0) |
| route->ce_mask |= ROUTE_ATTR_NHID; |
| else |
| route->ce_mask &= ~ROUTE_ATTR_NHID; |
| } |
| |
| uint32_t rtnl_route_get_nhid(struct rtnl_route *route) |
| { |
| return route->rt_nhid; |
| } |
| |
| /** @} */ |
| |
| /** |
| * @name Utilities |
| * @{ |
| */ |
| |
| /** |
| * Guess scope of a route object. |
| * @arg route Route object. |
| * |
| * Guesses the scope of a route object, based on the following rules: |
| * @code |
| * 1) Local route -> local scope |
| * 2) At least one nexthop not directly connected -> universe scope |
| * 3) All others -> link scope |
| * @endcode |
| * |
| * @return Scope value. |
| */ |
| int rtnl_route_guess_scope(struct rtnl_route *route) |
| { |
| if (route->rt_type == RTN_LOCAL) |
| return RT_SCOPE_HOST; |
| |
| if (route->rt_family == AF_MPLS) |
| return RT_SCOPE_UNIVERSE; |
| |
| if (!nl_list_empty(&route->rt_nexthops)) { |
| struct rtnl_nexthop *nh; |
| |
| /* |
| * Use scope uiniverse if there is at least one nexthop which |
| * is not directly connected |
| */ |
| nl_list_for_each_entry(nh, &route->rt_nexthops, rtnh_list) { |
| if (nh->rtnh_gateway || nh->rtnh_via) |
| return RT_SCOPE_UNIVERSE; |
| } |
| } |
| |
| return RT_SCOPE_LINK; |
| } |
| |
| /** @} */ |
| |
| static struct nl_addr *rtnl_route_parse_via(struct nlattr *nla) |
| { |
| int alen = nla_len(nla) - offsetof(struct rtvia, rtvia_addr); |
| struct rtvia *via = nla_data(nla); |
| |
| return nl_addr_build(via->rtvia_family, via->rtvia_addr, alen); |
| } |
| |
| static int rtnl_route_put_via(struct nl_msg *msg, struct nl_addr *addr) |
| { |
| unsigned int alen = nl_addr_get_len(addr); |
| struct nlattr *nla; |
| struct rtvia *via; |
| |
| nla = nla_reserve(msg, RTA_VIA, alen + sizeof(*via)); |
| if (!nla) |
| return -EMSGSIZE; |
| |
| via = nla_data(nla); |
| via->rtvia_family = nl_addr_get_family(addr); |
| memcpy(via->rtvia_addr, nl_addr_get_binary_addr(addr), alen); |
| |
| return 0; |
| } |
| |
| static struct nla_policy route_policy[RTA_MAX+1] = { |
| [RTA_IIF] = { .type = NLA_U32 }, |
| [RTA_OIF] = { .type = NLA_U32 }, |
| [RTA_PRIORITY] = { .type = NLA_U32 }, |
| [RTA_FLOW] = { .type = NLA_U32 }, |
| [RTA_CACHEINFO] = { .minlen = sizeof(struct rta_cacheinfo) }, |
| [RTA_METRICS] = { .type = NLA_NESTED }, |
| [RTA_MULTIPATH] = { .type = NLA_NESTED }, |
| [RTA_TTL_PROPAGATE] = { .type = NLA_U8 }, |
| [RTA_ENCAP] = { .type = NLA_NESTED }, |
| [RTA_ENCAP_TYPE] = { .type = NLA_U16 }, |
| [RTA_NH_ID] = { .type = NLA_U32 }, |
| }; |
| |
| static int parse_multipath(struct rtnl_route *route, struct nlattr *attr) |
| { |
| struct rtnexthop *rtnh = nla_data(attr); |
| size_t tlen = nla_len(attr); |
| int err; |
| |
| while (tlen >= sizeof(*rtnh) && tlen >= rtnh->rtnh_len) { |
| _nl_auto_rtnl_nexthop struct rtnl_nexthop *nh = NULL; |
| |
| nh = rtnl_route_nh_alloc(); |
| if (!nh) |
| return -NLE_NOMEM; |
| |
| rtnl_route_nh_set_weight(nh, rtnh->rtnh_hops); |
| rtnl_route_nh_set_ifindex(nh, rtnh->rtnh_ifindex); |
| rtnl_route_nh_set_flags(nh, rtnh->rtnh_flags); |
| |
| if (rtnh->rtnh_len > sizeof(*rtnh)) { |
| struct nlattr *ntb[RTA_MAX + 1]; |
| |
| err = nla_parse(ntb, RTA_MAX, (struct nlattr *) |
| RTNH_DATA(rtnh), |
| rtnh->rtnh_len - sizeof(*rtnh), |
| route_policy); |
| if (err < 0) |
| return err; |
| |
| if (ntb[RTA_GATEWAY]) { |
| _nl_auto_nl_addr struct nl_addr *addr = NULL; |
| |
| addr = nl_addr_alloc_attr(ntb[RTA_GATEWAY], |
| route->rt_family); |
| if (!addr) |
| return -NLE_NOMEM; |
| |
| rtnl_route_nh_set_gateway(nh, addr); |
| } |
| |
| if (ntb[RTA_FLOW]) { |
| uint32_t realms; |
| |
| realms = nla_get_u32(ntb[RTA_FLOW]); |
| rtnl_route_nh_set_realms(nh, realms); |
| } |
| |
| if (ntb[RTA_NEWDST]) { |
| _nl_auto_nl_addr struct nl_addr *addr = NULL; |
| |
| addr = nl_addr_alloc_attr(ntb[RTA_NEWDST], |
| route->rt_family); |
| if (!addr) |
| return -NLE_NOMEM; |
| |
| err = rtnl_route_nh_set_newdst(nh, addr); |
| if (err < 0) |
| return err; |
| } |
| |
| if (ntb[RTA_VIA]) { |
| _nl_auto_nl_addr struct nl_addr *addr = NULL; |
| |
| addr = rtnl_route_parse_via(ntb[RTA_VIA]); |
| if (!addr) |
| return -NLE_NOMEM; |
| |
| err = rtnl_route_nh_set_via(nh, addr); |
| if (err < 0) |
| return err; |
| } |
| |
| if (ntb[RTA_ENCAP] && ntb[RTA_ENCAP_TYPE]) { |
| err = nh_encap_parse_msg(ntb[RTA_ENCAP], |
| ntb[RTA_ENCAP_TYPE], |
| nh); |
| if (err < 0) |
| return err; |
| } |
| } |
| |
| rtnl_route_add_nexthop(route, _nl_steal_pointer(&nh)); |
| tlen -= RTNH_ALIGN(rtnh->rtnh_len); |
| rtnh = RTNH_NEXT(rtnh); |
| } |
| |
| return 0; |
| } |
| |
| int rtnl_route_parse(struct nlmsghdr *nlh, struct rtnl_route **result) |
| { |
| _nl_auto_rtnl_route struct rtnl_route *route = NULL; |
| _nl_auto_rtnl_nexthop struct rtnl_nexthop *old_nh = NULL; |
| _nl_auto_nl_addr struct nl_addr *src = NULL; |
| _nl_auto_nl_addr struct nl_addr *dst = NULL; |
| struct nlattr *tb[RTA_MAX + 1]; |
| struct rtmsg *rtm; |
| int family; |
| int err; |
| |
| route = rtnl_route_alloc(); |
| if (!route) |
| return -NLE_NOMEM; |
| |
| route->ce_msgtype = nlh->nlmsg_type; |
| |
| err = nlmsg_parse(nlh, sizeof(struct rtmsg), tb, RTA_MAX, route_policy); |
| if (err < 0) |
| return err; |
| |
| rtm = nlmsg_data(nlh); |
| route->rt_family = family = rtm->rtm_family; |
| route->rt_tos = rtm->rtm_tos; |
| route->rt_table = rtm->rtm_table; |
| route->rt_type = rtm->rtm_type; |
| route->rt_scope = rtm->rtm_scope; |
| route->rt_protocol = rtm->rtm_protocol; |
| route->rt_flags = rtm->rtm_flags; |
| route->rt_prio = 0; |
| |
| route->ce_mask |= ROUTE_ATTR_FAMILY | ROUTE_ATTR_TOS | |
| ROUTE_ATTR_TABLE | ROUTE_ATTR_TYPE | |
| ROUTE_ATTR_SCOPE | ROUTE_ATTR_PROTOCOL | |
| ROUTE_ATTR_FLAGS; |
| |
| /* right now MPLS does not allow rt_prio to be set, so don't |
| * assume it is unless it comes from an attribute |
| */ |
| if (family != AF_MPLS) |
| route->ce_mask |= ROUTE_ATTR_PRIO; |
| |
| if (tb[RTA_DST]) { |
| if (!(dst = nl_addr_alloc_attr(tb[RTA_DST], family))) |
| return -NLE_NOMEM; |
| } else { |
| int len; |
| |
| switch (family) { |
| case AF_INET: |
| len = 4; |
| break; |
| |
| case AF_INET6: |
| len = 16; |
| break; |
| default: |
| len = 0; |
| break; |
| } |
| |
| if (!(dst = nl_addr_build(family, NULL, len))) |
| return -NLE_NOMEM; |
| } |
| |
| nl_addr_set_prefixlen(dst, rtm->rtm_dst_len); |
| err = rtnl_route_set_dst(route, dst); |
| if (err < 0) |
| return err; |
| |
| if (tb[RTA_SRC]) { |
| if (!(src = nl_addr_alloc_attr(tb[RTA_SRC], family))) |
| return -NLE_NOMEM; |
| } else if (rtm->rtm_src_len) |
| if (!(src = nl_addr_alloc(0))) |
| return -NLE_NOMEM; |
| |
| if (src) { |
| nl_addr_set_prefixlen(src, rtm->rtm_src_len); |
| rtnl_route_set_src(route, src); |
| } |
| |
| if (tb[RTA_TABLE]) |
| rtnl_route_set_table(route, nla_get_u32(tb[RTA_TABLE])); |
| |
| if (tb[RTA_IIF]) |
| rtnl_route_set_iif(route, nla_get_u32(tb[RTA_IIF])); |
| |
| if (tb[RTA_PRIORITY]) |
| rtnl_route_set_priority(route, nla_get_u32(tb[RTA_PRIORITY])); |
| |
| if (tb[RTA_PREFSRC]) { |
| _nl_auto_nl_addr struct nl_addr *addr = NULL; |
| |
| if (!(addr = nl_addr_alloc_attr(tb[RTA_PREFSRC], family))) |
| return -NLE_NOMEM; |
| rtnl_route_set_pref_src(route, addr); |
| } |
| |
| if (tb[RTA_METRICS]) { |
| struct nlattr *mtb[RTAX_MAX + 1]; |
| int i; |
| |
| err = nla_parse_nested(mtb, RTAX_MAX, tb[RTA_METRICS], NULL); |
| if (err < 0) |
| return err; |
| |
| for (i = 1; i <= RTAX_MAX; i++) { |
| if (mtb[i] && _nla_len(mtb[i]) >= sizeof(uint32_t)) { |
| uint32_t m = nla_get_u32(mtb[i]); |
| |
| err = rtnl_route_set_metric(route, i, m); |
| if (err < 0) |
| return err; |
| } |
| } |
| } |
| |
| if (tb[RTA_MULTIPATH]) { |
| if ((err = parse_multipath(route, tb[RTA_MULTIPATH])) < 0) |
| return err; |
| } |
| |
| if (tb[RTA_CACHEINFO]) { |
| nla_memcpy(&route->rt_cacheinfo, tb[RTA_CACHEINFO], |
| sizeof(route->rt_cacheinfo)); |
| route->ce_mask |= ROUTE_ATTR_CACHEINFO; |
| } |
| |
| if (tb[RTA_OIF]) { |
| if (!old_nh && !(old_nh = rtnl_route_nh_alloc())) |
| return -NLE_NOMEM; |
| |
| rtnl_route_nh_set_ifindex(old_nh, nla_get_u32(tb[RTA_OIF])); |
| } |
| |
| if (tb[RTA_GATEWAY]) { |
| _nl_auto_nl_addr struct nl_addr *addr = NULL; |
| |
| if (!old_nh && !(old_nh = rtnl_route_nh_alloc())) |
| return -NLE_NOMEM; |
| |
| if (!(addr = nl_addr_alloc_attr(tb[RTA_GATEWAY], family))) |
| return -NLE_NOMEM; |
| |
| rtnl_route_nh_set_gateway(old_nh, addr); |
| } |
| |
| if (tb[RTA_FLOW]) { |
| if (!old_nh && !(old_nh = rtnl_route_nh_alloc())) |
| return -NLE_NOMEM; |
| |
| rtnl_route_nh_set_realms(old_nh, nla_get_u32(tb[RTA_FLOW])); |
| } |
| |
| if (tb[RTA_NEWDST]) { |
| _nl_auto_nl_addr struct nl_addr *addr = NULL; |
| |
| if (!old_nh && !(old_nh = rtnl_route_nh_alloc())) |
| return -NLE_NOMEM; |
| |
| addr = nl_addr_alloc_attr(tb[RTA_NEWDST], route->rt_family); |
| if (!addr) |
| return -NLE_NOMEM; |
| |
| err = rtnl_route_nh_set_newdst(old_nh, addr); |
| if (err < 0) |
| return err; |
| } |
| |
| if (tb[RTA_VIA]) { |
| int alen = nla_len(tb[RTA_VIA]) - offsetof(struct rtvia, rtvia_addr); |
| _nl_auto_nl_addr struct nl_addr *addr = NULL; |
| struct rtvia *via = nla_data(tb[RTA_VIA]); |
| |
| if (!old_nh && !(old_nh = rtnl_route_nh_alloc())) |
| return -NLE_NOMEM; |
| |
| addr = nl_addr_build(via->rtvia_family, via->rtvia_addr, alen); |
| if (!addr) |
| return -NLE_NOMEM; |
| |
| err = rtnl_route_nh_set_via(old_nh, addr); |
| if (err < 0) |
| return err; |
| } |
| |
| if (tb[RTA_TTL_PROPAGATE]) { |
| rtnl_route_set_ttl_propagate(route, |
| nla_get_u8(tb[RTA_TTL_PROPAGATE])); |
| } |
| |
| if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE]) { |
| if (!old_nh && !(old_nh = rtnl_route_nh_alloc())) |
| return -NLE_NOMEM; |
| |
| err = nh_encap_parse_msg(tb[RTA_ENCAP], |
| tb[RTA_ENCAP_TYPE], old_nh); |
| if (err < 0) |
| return err; |
| } |
| |
| if (tb[RTA_NH_ID]) { |
| rtnl_route_set_nhid(route, nla_get_u32(tb[RTA_NH_ID])); |
| } |
| |
| if (old_nh) { |
| rtnl_route_nh_set_flags(old_nh, rtm->rtm_flags & 0xff); |
| if (route->rt_nr_nh == 0) { |
| /* If no nexthops have been provided via RTA_MULTIPATH |
| * we add it as regular nexthop to maintain backwards |
| * compatibility */ |
| rtnl_route_add_nexthop(route, _nl_steal_pointer(&old_nh)); |
| } else { |
| /* Kernel supports new style nexthop configuration, |
| * verify that it is a duplicate and discard nexthop. */ |
| struct rtnl_nexthop *first; |
| |
| first = nl_list_first_entry(&route->rt_nexthops, |
| struct rtnl_nexthop, |
| rtnh_list); |
| if (!first) |
| BUG(); |
| |
| if (rtnl_route_nh_compare(old_nh, first, |
| old_nh->ce_mask, 0)) { |
| return -NLE_INVAL; |
| } |
| } |
| } |
| |
| *result = _nl_steal_pointer(&route); |
| return 0; |
| } |
| |
| int rtnl_route_build_msg(struct nl_msg *msg, struct rtnl_route *route) |
| { |
| int i; |
| struct nlattr *metrics; |
| struct rtmsg rtmsg = { |
| .rtm_family = route->rt_family, |
| .rtm_tos = route->rt_tos, |
| .rtm_table = route->rt_table, |
| .rtm_protocol = route->rt_protocol, |
| .rtm_scope = route->rt_scope, |
| .rtm_type = route->rt_type, |
| .rtm_flags = route->rt_flags, |
| }; |
| |
| if (route->rt_dst == NULL) |
| return -NLE_MISSING_ATTR; |
| |
| rtmsg.rtm_dst_len = nl_addr_get_prefixlen(route->rt_dst); |
| if (route->rt_src) |
| rtmsg.rtm_src_len = nl_addr_get_prefixlen(route->rt_src); |
| |
| if (!(route->ce_mask & ROUTE_ATTR_SCOPE)) |
| rtmsg.rtm_scope = rtnl_route_guess_scope(route); |
| |
| if (rtnl_route_get_nnexthops(route) == 1) { |
| struct rtnl_nexthop *nh; |
| nh = rtnl_route_nexthop_n(route, 0); |
| rtmsg.rtm_flags |= nh->rtnh_flags; |
| } |
| |
| if (nlmsg_append(msg, &rtmsg, sizeof(rtmsg), NLMSG_ALIGNTO) < 0) |
| goto nla_put_failure; |
| |
| /* Additional table attribute replacing the 8bit in the header, was |
| * required to allow more than 256 tables. MPLS does not allow the |
| * table attribute to be set |
| */ |
| if (route->rt_family != AF_MPLS) |
| NLA_PUT_U32(msg, RTA_TABLE, route->rt_table); |
| |
| if (nl_addr_get_len(route->rt_dst)) |
| NLA_PUT_ADDR(msg, RTA_DST, route->rt_dst); |
| |
| if (route->ce_mask & ROUTE_ATTR_PRIO) |
| NLA_PUT_U32(msg, RTA_PRIORITY, route->rt_prio); |
| |
| if (route->ce_mask & ROUTE_ATTR_SRC) |
| NLA_PUT_ADDR(msg, RTA_SRC, route->rt_src); |
| |
| if (route->ce_mask & ROUTE_ATTR_PREF_SRC) |
| NLA_PUT_ADDR(msg, RTA_PREFSRC, route->rt_pref_src); |
| |
| if (route->ce_mask & ROUTE_ATTR_IIF) |
| NLA_PUT_U32(msg, RTA_IIF, route->rt_iif); |
| |
| if (route->ce_mask & ROUTE_ATTR_TTL_PROPAGATE) |
| NLA_PUT_U8(msg, RTA_TTL_PROPAGATE, route->rt_ttl_propagate); |
| |
| if (route->rt_nmetrics > 0) { |
| uint32_t val; |
| |
| metrics = nla_nest_start(msg, RTA_METRICS); |
| if (metrics == NULL) |
| goto nla_put_failure; |
| |
| for (i = 1; i <= RTAX_MAX; i++) { |
| if (!rtnl_route_get_metric(route, i, &val)) |
| NLA_PUT_U32(msg, i, val); |
| } |
| |
| nla_nest_end(msg, metrics); |
| } |
| |
| /* Nexthop specification and nexthop id are mutually exclusive */ |
| if (route->ce_mask & ROUTE_ATTR_NHID) { |
| NLA_PUT_U32(msg, RTA_NH_ID, route->rt_nhid); |
| } else if (rtnl_route_get_nnexthops(route) == 1) { |
| struct rtnl_nexthop *nh; |
| |
| nh = rtnl_route_nexthop_n(route, 0); |
| if (nh->rtnh_gateway) |
| NLA_PUT_ADDR(msg, RTA_GATEWAY, nh->rtnh_gateway); |
| if (nh->rtnh_ifindex) |
| NLA_PUT_U32(msg, RTA_OIF, nh->rtnh_ifindex); |
| if (nh->rtnh_realms) |
| NLA_PUT_U32(msg, RTA_FLOW, nh->rtnh_realms); |
| if (nh->rtnh_newdst) |
| NLA_PUT_ADDR(msg, RTA_NEWDST, nh->rtnh_newdst); |
| if (nh->rtnh_via && rtnl_route_put_via(msg, nh->rtnh_via) < 0) |
| goto nla_put_failure; |
| if (nh->rtnh_encap && |
| nh_encap_build_msg(msg, nh->rtnh_encap) < 0) |
| goto nla_put_failure; |
| } else if (rtnl_route_get_nnexthops(route) > 1) { |
| struct nlattr *multipath; |
| struct rtnl_nexthop *nh; |
| |
| if (!(multipath = nla_nest_start(msg, RTA_MULTIPATH))) |
| goto nla_put_failure; |
| |
| nl_list_for_each_entry(nh, &route->rt_nexthops, rtnh_list) { |
| struct rtnexthop *rtnh; |
| |
| rtnh = nlmsg_reserve(msg, sizeof(*rtnh), NLMSG_ALIGNTO); |
| if (!rtnh) |
| goto nla_put_failure; |
| |
| rtnh->rtnh_flags = nh->rtnh_flags; |
| rtnh->rtnh_hops = nh->rtnh_weight; |
| rtnh->rtnh_ifindex = nh->rtnh_ifindex; |
| |
| if (nh->rtnh_gateway) |
| NLA_PUT_ADDR(msg, RTA_GATEWAY, |
| nh->rtnh_gateway); |
| |
| if (nh->rtnh_newdst) |
| NLA_PUT_ADDR(msg, RTA_NEWDST, nh->rtnh_newdst); |
| |
| if (nh->rtnh_via && |
| rtnl_route_put_via(msg, nh->rtnh_via) < 0) |
| goto nla_put_failure; |
| |
| if (nh->rtnh_realms) |
| NLA_PUT_U32(msg, RTA_FLOW, nh->rtnh_realms); |
| |
| if (nh->rtnh_encap && |
| nh_encap_build_msg(msg, nh->rtnh_encap) < 0) |
| goto nla_put_failure; |
| |
| rtnh->rtnh_len = (char *) nlmsg_tail(msg->nm_nlh) - |
| (char *) rtnh; |
| } |
| |
| nla_nest_end(msg, multipath); |
| } |
| |
| return 0; |
| |
| nla_put_failure: |
| return -NLE_MSGSIZE; |
| } |
| |
| /** @cond SKIP */ |
| struct nl_object_ops route_obj_ops = { |
| .oo_name = "route/route", |
| .oo_size = sizeof(struct rtnl_route), |
| .oo_constructor = route_constructor, |
| .oo_free_data = route_free_data, |
| .oo_clone = route_clone, |
| .oo_dump = { |
| [NL_DUMP_LINE] = route_dump_line, |
| [NL_DUMP_DETAILS] = route_dump_details, |
| [NL_DUMP_STATS] = route_dump_stats, |
| }, |
| .oo_compare = route_compare, |
| .oo_keygen = route_keygen, |
| .oo_update = route_update, |
| .oo_attrs2str = route_attrs2str, |
| .oo_id_attrs = (ROUTE_ATTR_FAMILY | ROUTE_ATTR_TOS | |
| ROUTE_ATTR_TABLE | ROUTE_ATTR_DST | |
| ROUTE_ATTR_PRIO), |
| .oo_id_attrs_get = route_id_attrs_get, |
| }; |
| /** @endcond */ |
| |
| /** @} */ |