| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <linux/icmpv6.h> |
| #include <linux/ipv6_route.h> |
| #include <linux/nexthop.h> |
| |
| #include "alloc-util.h" |
| #include "event-util.h" |
| #include "netlink-util.h" |
| #include "networkd-address.h" |
| #include "networkd-ipv4ll.h" |
| #include "networkd-manager.h" |
| #include "networkd-network.h" |
| #include "networkd-nexthop.h" |
| #include "networkd-queue.h" |
| #include "networkd-route-util.h" |
| #include "networkd-route.h" |
| #include "parse-util.h" |
| #include "string-util.h" |
| #include "strv.h" |
| #include "vrf.h" |
| #include "wireguard.h" |
| |
| int route_new(Route **ret) { |
| _cleanup_(route_freep) Route *route = NULL; |
| |
| route = new(Route, 1); |
| if (!route) |
| return -ENOMEM; |
| |
| *route = (Route) { |
| .family = AF_UNSPEC, |
| .scope = RT_SCOPE_UNIVERSE, |
| .protocol = RTPROT_UNSPEC, |
| .type = RTN_UNICAST, |
| .table = RT_TABLE_MAIN, |
| .lifetime_usec = USEC_INFINITY, |
| .quickack = -1, |
| .fast_open_no_cookie = -1, |
| .gateway_onlink = -1, |
| .ttl_propagate = -1, |
| }; |
| |
| *ret = TAKE_PTR(route); |
| |
| return 0; |
| } |
| |
| static int route_new_static(Network *network, const char *filename, unsigned section_line, Route **ret) { |
| _cleanup_(config_section_freep) ConfigSection *n = NULL; |
| _cleanup_(route_freep) Route *route = NULL; |
| int r; |
| |
| assert(network); |
| assert(ret); |
| assert(filename); |
| assert(section_line > 0); |
| |
| r = config_section_new(filename, section_line, &n); |
| if (r < 0) |
| return r; |
| |
| route = hashmap_get(network->routes_by_section, n); |
| if (route) { |
| *ret = TAKE_PTR(route); |
| return 0; |
| } |
| |
| if (hashmap_size(network->routes_by_section) >= routes_max()) |
| return -E2BIG; |
| |
| r = route_new(&route); |
| if (r < 0) |
| return r; |
| |
| route->protocol = RTPROT_STATIC; |
| route->network = network; |
| route->section = TAKE_PTR(n); |
| route->source = NETWORK_CONFIG_SOURCE_STATIC; |
| |
| r = hashmap_ensure_put(&network->routes_by_section, &config_section_hash_ops, route->section, route); |
| if (r < 0) |
| return r; |
| |
| *ret = TAKE_PTR(route); |
| return 0; |
| } |
| |
| Route *route_free(Route *route) { |
| if (!route) |
| return NULL; |
| |
| if (route->network) { |
| assert(route->section); |
| hashmap_remove(route->network->routes_by_section, route->section); |
| } |
| |
| config_section_free(route->section); |
| |
| if (route->link) |
| set_remove(route->link->routes, route); |
| |
| if (route->manager) |
| set_remove(route->manager->routes, route); |
| |
| ordered_set_free_with_destructor(route->multipath_routes, multipath_route_free); |
| |
| sd_event_source_disable_unref(route->expire); |
| |
| free(route->tcp_congestion_control_algo); |
| |
| return mfree(route); |
| } |
| |
| static void route_hash_func(const Route *route, struct siphash *state) { |
| assert(route); |
| |
| siphash24_compress(&route->family, sizeof(route->family), state); |
| |
| switch (route->family) { |
| case AF_INET: |
| case AF_INET6: |
| siphash24_compress(&route->dst_prefixlen, sizeof(route->dst_prefixlen), state); |
| siphash24_compress(&route->dst, FAMILY_ADDRESS_SIZE(route->family), state); |
| |
| siphash24_compress(&route->src_prefixlen, sizeof(route->src_prefixlen), state); |
| siphash24_compress(&route->src, FAMILY_ADDRESS_SIZE(route->family), state); |
| |
| siphash24_compress(&route->gw_family, sizeof(route->gw_family), state); |
| if (IN_SET(route->gw_family, AF_INET, AF_INET6)) { |
| siphash24_compress(&route->gw, FAMILY_ADDRESS_SIZE(route->gw_family), state); |
| siphash24_compress(&route->gw_weight, sizeof(route->gw_weight), state); |
| } |
| |
| siphash24_compress(&route->prefsrc, FAMILY_ADDRESS_SIZE(route->family), state); |
| |
| siphash24_compress(&route->tos, sizeof(route->tos), state); |
| siphash24_compress(&route->priority, sizeof(route->priority), state); |
| siphash24_compress(&route->table, sizeof(route->table), state); |
| siphash24_compress(&route->protocol, sizeof(route->protocol), state); |
| siphash24_compress(&route->scope, sizeof(route->scope), state); |
| siphash24_compress(&route->type, sizeof(route->type), state); |
| |
| siphash24_compress(&route->initcwnd, sizeof(route->initcwnd), state); |
| siphash24_compress(&route->initrwnd, sizeof(route->initrwnd), state); |
| |
| siphash24_compress(&route->advmss, sizeof(route->advmss), state); |
| siphash24_compress(&route->nexthop_id, sizeof(route->nexthop_id), state); |
| |
| break; |
| default: |
| /* treat any other address family as AF_UNSPEC */ |
| break; |
| } |
| } |
| |
| static int route_compare_func(const Route *a, const Route *b) { |
| int r; |
| |
| r = CMP(a->family, b->family); |
| if (r != 0) |
| return r; |
| |
| switch (a->family) { |
| case AF_INET: |
| case AF_INET6: |
| r = CMP(a->dst_prefixlen, b->dst_prefixlen); |
| if (r != 0) |
| return r; |
| |
| r = memcmp(&a->dst, &b->dst, FAMILY_ADDRESS_SIZE(a->family)); |
| if (r != 0) |
| return r; |
| |
| r = CMP(a->src_prefixlen, b->src_prefixlen); |
| if (r != 0) |
| return r; |
| |
| r = memcmp(&a->src, &b->src, FAMILY_ADDRESS_SIZE(a->family)); |
| if (r != 0) |
| return r; |
| |
| r = CMP(a->gw_family, b->gw_family); |
| if (r != 0) |
| return r; |
| |
| if (IN_SET(a->gw_family, AF_INET, AF_INET6)) { |
| r = memcmp(&a->gw, &b->gw, FAMILY_ADDRESS_SIZE(a->family)); |
| if (r != 0) |
| return r; |
| |
| r = CMP(a->gw_weight, b->gw_weight); |
| if (r != 0) |
| return r; |
| } |
| |
| r = memcmp(&a->prefsrc, &b->prefsrc, FAMILY_ADDRESS_SIZE(a->family)); |
| if (r != 0) |
| return r; |
| |
| r = CMP(a->tos, b->tos); |
| if (r != 0) |
| return r; |
| |
| r = CMP(a->priority, b->priority); |
| if (r != 0) |
| return r; |
| |
| r = CMP(a->table, b->table); |
| if (r != 0) |
| return r; |
| |
| r = CMP(a->protocol, b->protocol); |
| if (r != 0) |
| return r; |
| |
| r = CMP(a->scope, b->scope); |
| if (r != 0) |
| return r; |
| |
| r = CMP(a->type, b->type); |
| if (r != 0) |
| return r; |
| |
| r = CMP(a->initcwnd, b->initcwnd); |
| if (r != 0) |
| return r; |
| |
| r = CMP(a->initrwnd, b->initrwnd); |
| if (r != 0) |
| return r; |
| |
| r = CMP(a->advmss, b->advmss); |
| if (r != 0) |
| return r; |
| |
| r = CMP(a->nexthop_id, b->nexthop_id); |
| if (r != 0) |
| return r; |
| |
| return 0; |
| default: |
| /* treat any other address family as AF_UNSPEC */ |
| return 0; |
| } |
| } |
| |
| DEFINE_HASH_OPS_WITH_KEY_DESTRUCTOR( |
| route_hash_ops, |
| Route, |
| route_hash_func, |
| route_compare_func, |
| route_free); |
| |
| static bool route_type_is_reject(const Route *route) { |
| assert(route); |
| |
| return IN_SET(route->type, RTN_UNREACHABLE, RTN_PROHIBIT, RTN_BLACKHOLE, RTN_THROW); |
| } |
| |
| static bool route_needs_convert(const Route *route) { |
| assert(route); |
| |
| return route->nexthop_id > 0 || !ordered_set_isempty(route->multipath_routes); |
| } |
| |
| static int route_add(Manager *manager, Link *link, Route *route) { |
| int r; |
| |
| assert(route); |
| |
| if (route_type_is_reject(route)) { |
| assert(manager); |
| |
| r = set_ensure_put(&manager->routes, &route_hash_ops, route); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return -EEXIST; |
| |
| route->manager = manager; |
| } else { |
| assert(link); |
| |
| r = set_ensure_put(&link->routes, &route_hash_ops, route); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return -EEXIST; |
| |
| route->link = link; |
| } |
| |
| return 0; |
| } |
| |
| int route_get(Manager *manager, Link *link, const Route *in, Route **ret) { |
| Route *route; |
| |
| assert(in); |
| |
| if (route_type_is_reject(in)) { |
| if (!manager) |
| return -ENOENT; |
| |
| route = set_get(manager->routes, in); |
| } else { |
| if (!link) |
| return -ENOENT; |
| |
| route = set_get(link->routes, in); |
| } |
| if (!route) |
| return -ENOENT; |
| |
| if (ret) |
| *ret = route; |
| |
| return 0; |
| } |
| |
| int route_dup(const Route *src, Route **ret) { |
| _cleanup_(route_freep) Route *dest = NULL; |
| int r; |
| |
| /* This does not copy mulipath routes. */ |
| |
| assert(src); |
| assert(ret); |
| |
| dest = newdup(Route, src, 1); |
| if (!dest) |
| return -ENOMEM; |
| |
| /* Unset all pointers */ |
| dest->network = NULL; |
| dest->section = NULL; |
| dest->link = NULL; |
| dest->manager = NULL; |
| dest->multipath_routes = NULL; |
| dest->expire = NULL; |
| dest->tcp_congestion_control_algo = NULL; |
| |
| r = free_and_strdup(&dest->tcp_congestion_control_algo, src->tcp_congestion_control_algo); |
| if (r < 0) |
| return r; |
| |
| *ret = TAKE_PTR(dest); |
| return 0; |
| } |
| |
| static void route_apply_nexthop(Route *route, const NextHop *nh, uint8_t nh_weight) { |
| assert(route); |
| assert(nh); |
| assert(hashmap_isempty(nh->group)); |
| |
| route->gw_family = nh->family; |
| route->gw = nh->gw; |
| |
| if (nh_weight != UINT8_MAX) |
| route->gw_weight = nh_weight; |
| |
| if (nh->blackhole) |
| route->type = RTN_BLACKHOLE; |
| } |
| |
| static void route_apply_multipath_route(Route *route, const MultipathRoute *m) { |
| assert(route); |
| assert(m); |
| |
| route->gw_family = m->gateway.family; |
| route->gw = m->gateway.address; |
| route->gw_weight = m->weight; |
| } |
| |
| static int multipath_route_get_link(Manager *manager, const MultipathRoute *m, Link **ret) { |
| int r; |
| |
| assert(manager); |
| assert(m); |
| |
| if (m->ifname) { |
| r = link_get_by_name(manager, m->ifname, ret); |
| return r < 0 ? r : 1; |
| |
| } else if (m->ifindex > 0) { /* Always ignore ifindex if ifname is set. */ |
| r = link_get_by_index(manager, m->ifindex, ret); |
| return r < 0 ? r : 1; |
| } |
| |
| if (ret) |
| *ret = NULL; |
| return 0; |
| } |
| |
| typedef struct ConvertedRoutes { |
| size_t n; |
| Route **routes; |
| Link **links; |
| } ConvertedRoutes; |
| |
| static ConvertedRoutes *converted_routes_free(ConvertedRoutes *c) { |
| if (!c) |
| return NULL; |
| |
| for (size_t i = 0; i < c->n; i++) |
| route_free(c->routes[i]); |
| |
| free(c->routes); |
| free(c->links); |
| |
| return mfree(c); |
| } |
| |
| DEFINE_TRIVIAL_CLEANUP_FUNC(ConvertedRoutes*, converted_routes_free); |
| |
| static int converted_routes_new(size_t n, ConvertedRoutes **ret) { |
| _cleanup_(converted_routes_freep) ConvertedRoutes *c = NULL; |
| _cleanup_free_ Route **routes = NULL; |
| _cleanup_free_ Link **links = NULL; |
| |
| assert(n > 0); |
| assert(ret); |
| |
| routes = new0(Route*, n); |
| if (!routes) |
| return -ENOMEM; |
| |
| links = new0(Link*, n); |
| if (!links) |
| return -ENOMEM; |
| |
| c = new(ConvertedRoutes, 1); |
| if (!c) |
| return -ENOMEM; |
| |
| *c = (ConvertedRoutes) { |
| .n = n, |
| .routes = TAKE_PTR(routes), |
| .links = TAKE_PTR(links), |
| }; |
| |
| *ret = TAKE_PTR(c); |
| return 0; |
| } |
| |
| static int route_convert(Manager *manager, const Route *route, ConvertedRoutes **ret) { |
| _cleanup_(converted_routes_freep) ConvertedRoutes *c = NULL; |
| int r; |
| |
| assert(manager); |
| assert(route); |
| assert(ret); |
| |
| if (!route_needs_convert(route)) { |
| *ret = NULL; |
| return 0; |
| } |
| |
| if (route->nexthop_id > 0) { |
| struct nexthop_grp *nhg; |
| NextHop *nh; |
| |
| r = manager_get_nexthop_by_id(manager, route->nexthop_id, &nh); |
| if (r < 0) |
| return r; |
| |
| if (hashmap_isempty(nh->group)) { |
| r = converted_routes_new(1, &c); |
| if (r < 0) |
| return r; |
| |
| r = route_dup(route, &c->routes[0]); |
| if (r < 0) |
| return r; |
| |
| route_apply_nexthop(c->routes[0], nh, UINT8_MAX); |
| c->links[0] = nh->link; |
| |
| *ret = TAKE_PTR(c); |
| return 1; |
| } |
| |
| r = converted_routes_new(hashmap_size(nh->group), &c); |
| if (r < 0) |
| return r; |
| |
| size_t i = 0; |
| HASHMAP_FOREACH(nhg, nh->group) { |
| NextHop *h; |
| |
| r = manager_get_nexthop_by_id(manager, nhg->id, &h); |
| if (r < 0) |
| return r; |
| |
| r = route_dup(route, &c->routes[i]); |
| if (r < 0) |
| return r; |
| |
| route_apply_nexthop(c->routes[i], h, nhg->weight); |
| c->links[i] = h->link; |
| |
| i++; |
| } |
| |
| *ret = TAKE_PTR(c); |
| return 1; |
| |
| } |
| |
| assert(!ordered_set_isempty(route->multipath_routes)); |
| |
| r = converted_routes_new(ordered_set_size(route->multipath_routes), &c); |
| if (r < 0) |
| return r; |
| |
| size_t i = 0; |
| MultipathRoute *m; |
| ORDERED_SET_FOREACH(m, route->multipath_routes) { |
| r = route_dup(route, &c->routes[i]); |
| if (r < 0) |
| return r; |
| |
| route_apply_multipath_route(c->routes[i], m); |
| |
| r = multipath_route_get_link(manager, m, &c->links[i]); |
| if (r < 0) |
| return r; |
| |
| i++; |
| } |
| |
| *ret = TAKE_PTR(c); |
| return 1; |
| } |
| |
| void link_mark_routes(Link *link, NetworkConfigSource source) { |
| Route *route; |
| |
| assert(link); |
| |
| SET_FOREACH(route, link->routes) { |
| if (route->source != source) |
| continue; |
| |
| route_mark(route); |
| } |
| } |
| |
| static void log_route_debug(const Route *route, const char *str, const Link *link, const Manager *manager) { |
| _cleanup_free_ char *state = NULL, *gw_alloc = NULL, *prefsrc = NULL, |
| *table = NULL, *scope = NULL, *proto = NULL, *flags = NULL; |
| const char *gw = NULL, *dst, *src; |
| |
| assert(route); |
| assert(str); |
| assert(manager); |
| |
| /* link may be NULL. */ |
| |
| if (!DEBUG_LOGGING) |
| return; |
| |
| (void) network_config_state_to_string_alloc(route->state, &state); |
| |
| dst = in_addr_is_set(route->family, &route->dst) || route->dst_prefixlen > 0 ? |
| IN_ADDR_PREFIX_TO_STRING(route->family, &route->dst, route->dst_prefixlen) : NULL; |
| src = in_addr_is_set(route->family, &route->src) || route->src_prefixlen > 0 ? |
| IN_ADDR_PREFIX_TO_STRING(route->family, &route->src, route->src_prefixlen) : NULL; |
| |
| if (in_addr_is_set(route->gw_family, &route->gw)) { |
| (void) in_addr_to_string(route->gw_family, &route->gw, &gw_alloc); |
| gw = gw_alloc; |
| } else if (route->gateway_from_dhcp_or_ra) { |
| if (route->gw_family == AF_INET) |
| gw = "_dhcp4"; |
| else if (route->gw_family == AF_INET6) |
| gw = "_ipv6ra"; |
| } else { |
| MultipathRoute *m; |
| |
| ORDERED_SET_FOREACH(m, route->multipath_routes) { |
| _cleanup_free_ char *buf = NULL; |
| union in_addr_union a = m->gateway.address; |
| |
| (void) in_addr_to_string(m->gateway.family, &a, &buf); |
| (void) strextend_with_separator(&gw_alloc, ",", strna(buf)); |
| if (m->ifname) |
| (void) strextend(&gw_alloc, "@", m->ifname); |
| else if (m->ifindex > 0) |
| (void) strextendf(&gw_alloc, "@%i", m->ifindex); |
| /* See comments in config_parse_multipath_route(). */ |
| (void) strextendf(&gw_alloc, ":%"PRIu32, m->weight + 1); |
| } |
| gw = gw_alloc; |
| } |
| if (in_addr_is_set(route->family, &route->prefsrc)) |
| (void) in_addr_to_string(route->family, &route->prefsrc, &prefsrc); |
| (void) route_scope_to_string_alloc(route->scope, &scope); |
| (void) manager_get_route_table_to_string(manager, route->table, &table); |
| (void) route_protocol_full_to_string_alloc(route->protocol, &proto); |
| (void) route_flags_to_string_alloc(route->flags, &flags); |
| |
| log_link_debug(link, |
| "%s %s route (%s): dst: %s, src: %s, gw: %s, prefsrc: %s, scope: %s, table: %s, " |
| "proto: %s, type: %s, nexthop: %"PRIu32", priority: %"PRIu32", flags: %s", |
| str, strna(network_config_source_to_string(route->source)), strna(state), |
| strna(dst), strna(src), strna(gw), strna(prefsrc), |
| strna(scope), strna(table), strna(proto), |
| strna(route_type_to_string(route->type)), |
| route->nexthop_id, route->priority, strna(flags)); |
| } |
| |
| static int route_set_netlink_message(const Route *route, sd_netlink_message *req, Link *link) { |
| int r; |
| |
| assert(route); |
| assert(req); |
| |
| /* link may be NULL */ |
| |
| if (in_addr_is_set(route->gw_family, &route->gw) && route->nexthop_id == 0) { |
| if (route->gw_family == route->family) { |
| r = netlink_message_append_in_addr_union(req, RTA_GATEWAY, route->gw_family, &route->gw); |
| if (r < 0) |
| return r; |
| } else { |
| RouteVia rtvia = { |
| .family = route->gw_family, |
| .address = route->gw, |
| }; |
| |
| r = sd_netlink_message_append_data(req, RTA_VIA, &rtvia, sizeof(rtvia)); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| if (route->dst_prefixlen > 0) { |
| r = netlink_message_append_in_addr_union(req, RTA_DST, route->family, &route->dst); |
| if (r < 0) |
| return r; |
| |
| r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen); |
| if (r < 0) |
| return r; |
| } |
| |
| if (route->src_prefixlen > 0) { |
| r = netlink_message_append_in_addr_union(req, RTA_SRC, route->family, &route->src); |
| if (r < 0) |
| return r; |
| |
| r = sd_rtnl_message_route_set_src_prefixlen(req, route->src_prefixlen); |
| if (r < 0) |
| return r; |
| } |
| |
| if (in_addr_is_set(route->family, &route->prefsrc)) { |
| r = netlink_message_append_in_addr_union(req, RTA_PREFSRC, route->family, &route->prefsrc); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_rtnl_message_route_set_scope(req, route->scope); |
| if (r < 0) |
| return r; |
| |
| r = sd_rtnl_message_route_set_flags(req, route->flags & RTNH_F_ONLINK); |
| if (r < 0) |
| return r; |
| |
| if (route->table < 256) { |
| r = sd_rtnl_message_route_set_table(req, route->table); |
| if (r < 0) |
| return r; |
| } else { |
| r = sd_rtnl_message_route_set_table(req, RT_TABLE_UNSPEC); |
| if (r < 0) |
| return r; |
| |
| /* Table attribute to allow more than 256. */ |
| r = sd_netlink_message_append_u32(req, RTA_TABLE, route->table); |
| if (r < 0) |
| return r; |
| } |
| |
| if (!route_type_is_reject(route) && |
| route->nexthop_id == 0 && |
| ordered_set_isempty(route->multipath_routes)) { |
| assert(link); /* Those routes must be attached to a specific link */ |
| |
| r = sd_netlink_message_append_u32(req, RTA_OIF, link->ifindex); |
| if (r < 0) |
| return r; |
| } |
| |
| if (route->nexthop_id > 0) { |
| r = sd_netlink_message_append_u32(req, RTA_NH_ID, route->nexthop_id); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_netlink_message_append_u8(req, RTA_PREF, route->pref); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_append_u32(req, RTA_PRIORITY, route->priority); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static int route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
| int r; |
| |
| assert(m); |
| |
| /* link may be NULL. */ |
| |
| if (link && IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
| return 0; |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0 && r != -ESRCH) |
| log_link_message_warning_errno(link, m, r, "Could not drop route, ignoring"); |
| |
| return 1; |
| } |
| |
| int route_remove(Route *route) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
| unsigned char type; |
| Manager *manager; |
| Link *link; |
| int r; |
| |
| assert(route); |
| assert(route->manager || (route->link && route->link->manager)); |
| assert(IN_SET(route->family, AF_INET, AF_INET6)); |
| |
| link = route->link; |
| manager = route->manager ?: link->manager; |
| |
| log_route_debug(route, "Removing", link, manager); |
| |
| r = sd_rtnl_message_new_route(manager->rtnl, &req, |
| RTM_DELROUTE, route->family, |
| route->protocol); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not create netlink message: %m"); |
| |
| if (route->family == AF_INET && route->nexthop_id > 0 && route->type == RTN_BLACKHOLE) |
| /* When IPv4 route has nexthop id and the nexthop type is blackhole, even though kernel |
| * sends RTM_NEWROUTE netlink message with blackhole type, kernel's internal route type |
| * fib_rt_info::type may not be blackhole. Thus, we cannot know the internal value. |
| * Moreover, on route removal, the matching is done with the hidden value if we set |
| * non-zero type in RTM_DELROUTE message. Note, sd_rtnl_message_new_route() sets |
| * RTN_UNICAST by default. So, we need to clear the type here. */ |
| type = RTN_UNSPEC; |
| else |
| type = route->type; |
| |
| r = sd_rtnl_message_route_set_type(req, type); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not set route type: %m"); |
| |
| r = route_set_netlink_message(route, req, link); |
| if (r < 0) |
| return log_error_errno(r, "Could not fill netlink message: %m"); |
| |
| r = netlink_call_async(manager->rtnl, NULL, req, route_remove_handler, |
| link ? link_netlink_destroy_callback : NULL, link); |
| if (r < 0) |
| return log_link_error_errno(link, r, "Could not send netlink message: %m"); |
| |
| link_ref(link); |
| |
| route_enter_removing(route); |
| return 0; |
| } |
| |
| int route_remove_and_drop(Route *route) { |
| if (!route) |
| return 0; |
| |
| route_cancel_request(route, NULL); |
| |
| if (route_exists(route)) |
| return route_remove(route); |
| |
| if (route->state == 0) |
| route_free(route); |
| |
| return 0; |
| } |
| |
| static void manager_mark_routes(Manager *manager, bool foreign, const Link *except) { |
| Route *route; |
| Link *link; |
| int r; |
| |
| assert(manager); |
| |
| /* First, mark all routes. */ |
| SET_FOREACH(route, manager->routes) { |
| /* Do not touch routes managed by the kernel. */ |
| if (route->protocol == RTPROT_KERNEL) |
| continue; |
| |
| /* When 'foreign' is true, mark only foreign routes, and vice versa. */ |
| if (foreign != (route->source == NETWORK_CONFIG_SOURCE_FOREIGN)) |
| continue; |
| |
| /* Do not touch dynamic routes. They will removed by dhcp_pd_prefix_lost() */ |
| if (IN_SET(route->source, NETWORK_CONFIG_SOURCE_DHCP4, NETWORK_CONFIG_SOURCE_DHCP6)) |
| continue; |
| |
| /* Ignore routes not assigned yet or already removed. */ |
| if (!route_exists(route)) |
| continue; |
| |
| route_mark(route); |
| } |
| |
| /* Then, unmark all routes requested by active links. */ |
| HASHMAP_FOREACH(link, manager->links_by_index) { |
| if (link == except) |
| continue; |
| |
| if (!link->network) |
| continue; |
| |
| if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) |
| continue; |
| |
| HASHMAP_FOREACH(route, link->network->routes_by_section) { |
| _cleanup_(converted_routes_freep) ConvertedRoutes *converted = NULL; |
| Route *existing; |
| |
| r = route_convert(manager, route, &converted); |
| if (r < 0) |
| continue; |
| if (r == 0) { |
| if (route_get(manager, NULL, route, &existing) >= 0) |
| route_unmark(existing); |
| continue; |
| } |
| |
| for (size_t i = 0; i < converted->n; i++) |
| if (route_get(manager, NULL, converted->routes[i], &existing) >= 0) |
| route_unmark(existing); |
| } |
| } |
| } |
| |
| static int manager_drop_marked_routes(Manager *manager) { |
| Route *route; |
| int k, r = 0; |
| |
| assert(manager); |
| |
| SET_FOREACH(route, manager->routes) { |
| if (!route_is_marked(route)) |
| continue; |
| |
| k = route_remove(route); |
| if (k < 0 && r >= 0) |
| r = k; |
| } |
| |
| return r; |
| } |
| |
| static bool route_by_kernel(const Route *route) { |
| assert(route); |
| |
| if (route->protocol == RTPROT_KERNEL) |
| return true; |
| |
| /* The kernels older than a826b04303a40d52439aa141035fca5654ccaccd (v5.11) create the IPv6 |
| * multicast with RTPROT_BOOT. Do not touch it. */ |
| if (route->protocol == RTPROT_BOOT && |
| route->family == AF_INET6 && |
| route->dst_prefixlen == 8 && |
| in6_addr_equal(&route->dst.in6, & (struct in6_addr) {{{ 0xff,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 }}})) |
| return true; |
| |
| return false; |
| } |
| |
| static void link_unmark_wireguard_routes(Link *link) { |
| Route *route, *existing; |
| Wireguard *w; |
| |
| assert(link); |
| |
| w = WIREGUARD(link->netdev); |
| if (!w) |
| return; |
| |
| SET_FOREACH(route, w->routes) |
| if (route_get(NULL, link, route, &existing) >= 0) |
| route_unmark(existing); |
| } |
| |
| int link_drop_foreign_routes(Link *link) { |
| Route *route; |
| int k, r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(link->network); |
| |
| SET_FOREACH(route, link->routes) { |
| /* do not touch routes managed by the kernel */ |
| if (route_by_kernel(route)) |
| continue; |
| |
| /* Do not remove routes we configured. */ |
| if (route->source != NETWORK_CONFIG_SOURCE_FOREIGN) |
| continue; |
| |
| /* Ignore routes not assigned yet or already removed. */ |
| if (!route_exists(route)) |
| continue; |
| |
| if (route->protocol == RTPROT_STATIC && |
| FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC)) |
| continue; |
| |
| if (route->protocol == RTPROT_DHCP && |
| FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP)) |
| continue; |
| |
| route_mark(route); |
| } |
| |
| HASHMAP_FOREACH(route, link->network->routes_by_section) { |
| _cleanup_(converted_routes_freep) ConvertedRoutes *converted = NULL; |
| Route *existing; |
| |
| r = route_convert(link->manager, route, &converted); |
| if (r < 0) |
| continue; |
| if (r == 0) { |
| if (route_get(NULL, link, route, &existing) >= 0) |
| route_unmark(existing); |
| continue; |
| } |
| |
| for (size_t i = 0; i < converted->n; i++) |
| if (route_get(NULL, link, converted->routes[i], &existing) >= 0) |
| route_unmark(existing); |
| } |
| |
| link_unmark_wireguard_routes(link); |
| |
| r = 0; |
| SET_FOREACH(route, link->routes) { |
| if (!route_is_marked(route)) |
| continue; |
| |
| k = route_remove(route); |
| if (k < 0 && r >= 0) |
| r = k; |
| } |
| |
| manager_mark_routes(link->manager, /* foreign = */ true, NULL); |
| |
| k = manager_drop_marked_routes(link->manager); |
| if (k < 0 && r >= 0) |
| r = k; |
| |
| return r; |
| } |
| |
| int link_drop_managed_routes(Link *link) { |
| Route *route; |
| int k, r = 0; |
| |
| assert(link); |
| |
| SET_FOREACH(route, link->routes) { |
| /* do not touch routes managed by the kernel */ |
| if (route_by_kernel(route)) |
| continue; |
| |
| /* Do not touch routes managed by kernel or other tools. */ |
| if (route->source == NETWORK_CONFIG_SOURCE_FOREIGN) |
| continue; |
| |
| if (!route_exists(route)) |
| continue; |
| |
| k = route_remove(route); |
| if (k < 0 && r >= 0) |
| r = k; |
| } |
| |
| manager_mark_routes(link->manager, /* foreign = */ false, link); |
| |
| k = manager_drop_marked_routes(link->manager); |
| if (k < 0 && r >= 0) |
| r = k; |
| |
| return r; |
| } |
| |
| void link_foreignize_routes(Link *link) { |
| Route *route; |
| |
| assert(link); |
| |
| SET_FOREACH(route, link->routes) |
| route->source = NETWORK_CONFIG_SOURCE_FOREIGN; |
| |
| manager_mark_routes(link->manager, /* foreign = */ false, link); |
| |
| SET_FOREACH(route, link->manager->routes) { |
| if (!route_is_marked(route)) |
| continue; |
| |
| route->source = NETWORK_CONFIG_SOURCE_FOREIGN; |
| } |
| } |
| |
| static int route_expire_handler(sd_event_source *s, uint64_t usec, void *userdata) { |
| Route *route = ASSERT_PTR(userdata); |
| Link *link; |
| int r; |
| |
| assert(route->manager || (route->link && route->link->manager)); |
| |
| link = route->link; /* This may be NULL. */ |
| |
| r = route_remove(route); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Could not remove route: %m"); |
| if (link) |
| link_enter_failed(link); |
| } |
| |
| return 1; |
| } |
| |
| static int route_setup_timer(Route *route, const struct rta_cacheinfo *cacheinfo) { |
| Manager *manager; |
| int r; |
| |
| assert(route); |
| assert(route->manager || (route->link && route->link->manager)); |
| |
| manager = route->manager ?: route->link->manager; |
| |
| if (route->lifetime_usec == USEC_INFINITY) |
| return 0; |
| |
| if (cacheinfo && cacheinfo->rta_expires != 0) |
| /* Assume that non-zero rta_expires means kernel will handle the route expiration. */ |
| return 0; |
| |
| r = event_reset_time(manager->event, &route->expire, CLOCK_BOOTTIME, |
| route->lifetime_usec, 0, route_expire_handler, route, 0, "route-expiration", true); |
| if (r < 0) |
| return r; |
| |
| return 1; |
| } |
| |
| static int append_nexthop_one(const Link *link, const Route *route, const MultipathRoute *m, struct rtattr **rta, size_t offset) { |
| struct rtnexthop *rtnh; |
| struct rtattr *new_rta; |
| int r; |
| |
| assert(route); |
| assert(m); |
| assert(rta); |
| assert(*rta); |
| |
| new_rta = realloc(*rta, RTA_ALIGN((*rta)->rta_len) + RTA_SPACE(sizeof(struct rtnexthop))); |
| if (!new_rta) |
| return -ENOMEM; |
| *rta = new_rta; |
| |
| rtnh = (struct rtnexthop *)((uint8_t *) *rta + offset); |
| *rtnh = (struct rtnexthop) { |
| .rtnh_len = sizeof(*rtnh), |
| .rtnh_ifindex = m->ifindex > 0 ? m->ifindex : link->ifindex, |
| .rtnh_hops = m->weight, |
| }; |
| |
| (*rta)->rta_len += sizeof(struct rtnexthop); |
| |
| if (route->family == m->gateway.family) { |
| r = rtattr_append_attribute(rta, RTA_GATEWAY, &m->gateway.address, FAMILY_ADDRESS_SIZE(m->gateway.family)); |
| if (r < 0) |
| goto clear; |
| rtnh = (struct rtnexthop *)((uint8_t *) *rta + offset); |
| rtnh->rtnh_len += RTA_SPACE(FAMILY_ADDRESS_SIZE(m->gateway.family)); |
| } else { |
| r = rtattr_append_attribute(rta, RTA_VIA, &m->gateway, FAMILY_ADDRESS_SIZE(m->gateway.family) + sizeof(m->gateway.family)); |
| if (r < 0) |
| goto clear; |
| rtnh = (struct rtnexthop *)((uint8_t *) *rta + offset); |
| rtnh->rtnh_len += RTA_SPACE(FAMILY_ADDRESS_SIZE(m->gateway.family) + sizeof(m->gateway.family)); |
| } |
| |
| return 0; |
| |
| clear: |
| (*rta)->rta_len -= sizeof(struct rtnexthop); |
| return r; |
| } |
| |
| static int append_nexthops(const Link *link, const Route *route, sd_netlink_message *req) { |
| _cleanup_free_ struct rtattr *rta = NULL; |
| struct rtnexthop *rtnh; |
| MultipathRoute *m; |
| size_t offset; |
| int r; |
| |
| assert(link); |
| assert(route); |
| assert(req); |
| |
| if (ordered_set_isempty(route->multipath_routes)) |
| return 0; |
| |
| rta = new(struct rtattr, 1); |
| if (!rta) |
| return -ENOMEM; |
| |
| *rta = (struct rtattr) { |
| .rta_type = RTA_MULTIPATH, |
| .rta_len = RTA_LENGTH(0), |
| }; |
| offset = (uint8_t *) RTA_DATA(rta) - (uint8_t *) rta; |
| |
| ORDERED_SET_FOREACH(m, route->multipath_routes) { |
| r = append_nexthop_one(link, route, m, &rta, offset); |
| if (r < 0) |
| return r; |
| |
| rtnh = (struct rtnexthop *)((uint8_t *) rta + offset); |
| offset = (uint8_t *) RTNH_NEXT(rtnh) - (uint8_t *) rta; |
| } |
| |
| r = sd_netlink_message_append_data(req, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta)); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| int route_configure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) { |
| int r; |
| |
| assert(m); |
| assert(link); |
| assert(error_msg); |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r < 0 && r != -EEXIST) { |
| log_link_message_warning_errno(link, m, r, "Could not set route"); |
| link_enter_failed(link); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static int route_configure(const Route *route, uint32_t lifetime_sec, Link *link, Request *req) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
| int r; |
| |
| assert(route); |
| assert(IN_SET(route->family, AF_INET, AF_INET6)); |
| assert(link); |
| assert(link->manager); |
| assert(link->manager->rtnl); |
| assert(link->ifindex > 0); |
| assert(req); |
| |
| log_route_debug(route, "Configuring", link, link->manager); |
| |
| r = sd_rtnl_message_new_route(link->manager->rtnl, &m, RTM_NEWROUTE, route->family, route->protocol); |
| if (r < 0) |
| return r; |
| |
| r = sd_rtnl_message_route_set_type(m, route->type); |
| if (r < 0) |
| return r; |
| |
| r = route_set_netlink_message(route, m, link); |
| if (r < 0) |
| return r; |
| |
| if (lifetime_sec != UINT32_MAX) { |
| r = sd_netlink_message_append_u32(m, RTA_EXPIRES, lifetime_sec); |
| if (r < 0) |
| return r; |
| } |
| |
| if (route->ttl_propagate >= 0) { |
| r = sd_netlink_message_append_u8(m, RTA_TTL_PROPAGATE, route->ttl_propagate); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_netlink_message_open_container(m, RTA_METRICS); |
| if (r < 0) |
| return r; |
| |
| if (route->mtu > 0) { |
| r = sd_netlink_message_append_u32(m, RTAX_MTU, route->mtu); |
| if (r < 0) |
| return r; |
| } |
| |
| if (route->initcwnd > 0) { |
| r = sd_netlink_message_append_u32(m, RTAX_INITCWND, route->initcwnd); |
| if (r < 0) |
| return r; |
| } |
| |
| if (route->initrwnd > 0) { |
| r = sd_netlink_message_append_u32(m, RTAX_INITRWND, route->initrwnd); |
| if (r < 0) |
| return r; |
| } |
| |
| if (route->quickack >= 0) { |
| r = sd_netlink_message_append_u32(m, RTAX_QUICKACK, route->quickack); |
| if (r < 0) |
| return r; |
| } |
| |
| if (route->fast_open_no_cookie >= 0) { |
| r = sd_netlink_message_append_u32(m, RTAX_FASTOPEN_NO_COOKIE, route->fast_open_no_cookie); |
| if (r < 0) |
| return r; |
| } |
| |
| if (route->advmss > 0) { |
| r = sd_netlink_message_append_u32(m, RTAX_ADVMSS, route->advmss); |
| if (r < 0) |
| return r; |
| } |
| |
| if (!isempty(route->tcp_congestion_control_algo)) { |
| r = sd_netlink_message_append_string(m, RTAX_CC_ALGO, route->tcp_congestion_control_algo); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_netlink_message_close_container(m); |
| if (r < 0) |
| return r; |
| |
| if (!ordered_set_isempty(route->multipath_routes)) { |
| assert(route->nexthop_id == 0); |
| assert(!in_addr_is_set(route->gw_family, &route->gw)); |
| |
| r = append_nexthops(link, route, m); |
| if (r < 0) |
| return r; |
| } |
| |
| return request_call_netlink_async(link->manager->rtnl, m, req); |
| } |
| |
| static int route_is_ready_to_configure(const Route *route, Link *link) { |
| int r; |
| |
| assert(route); |
| assert(link); |
| |
| if (!link_is_ready_to_configure(link, false)) |
| return false; |
| |
| if (set_size(link->routes) >= routes_max()) |
| return false; |
| |
| if (route->nexthop_id > 0) { |
| struct nexthop_grp *nhg; |
| NextHop *nh; |
| |
| if (manager_get_nexthop_by_id(link->manager, route->nexthop_id, &nh) < 0) |
| return false; |
| |
| if (!nexthop_exists(nh)) |
| return false; |
| |
| HASHMAP_FOREACH(nhg, nh->group) { |
| NextHop *g; |
| |
| if (manager_get_nexthop_by_id(link->manager, nhg->id, &g) < 0) |
| return false; |
| |
| if (!nexthop_exists(g)) |
| return false; |
| } |
| } |
| |
| if (in_addr_is_set(route->family, &route->prefsrc) > 0) { |
| r = manager_has_address(link->manager, route->family, &route->prefsrc, route->family == AF_INET6); |
| if (r <= 0) |
| return r; |
| } |
| |
| if (!gateway_is_ready(link, FLAGS_SET(route->flags, RTNH_F_ONLINK), route->gw_family, &route->gw)) |
| return false; |
| |
| MultipathRoute *m; |
| ORDERED_SET_FOREACH(m, route->multipath_routes) { |
| union in_addr_union a = m->gateway.address; |
| Link *l = NULL; |
| |
| r = multipath_route_get_link(link->manager, m, &l); |
| if (r < 0) |
| return false; |
| if (r > 0) { |
| if (!link_is_ready_to_configure(l, /* allow_unmanaged = */ true) || |
| !link_has_carrier(l)) |
| return false; |
| |
| m->ifindex = l->ifindex; |
| } |
| |
| if (!gateway_is_ready(l ?: link, FLAGS_SET(route->flags, RTNH_F_ONLINK), m->gateway.family, &a)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static int route_process_request(Request *req, Link *link, Route *route) { |
| _cleanup_(converted_routes_freep) ConvertedRoutes *converted = NULL; |
| int r; |
| |
| assert(req); |
| assert(link); |
| assert(link->manager); |
| assert(route); |
| |
| r = route_is_ready_to_configure(route, link); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to check if route is ready to configure: %m"); |
| if (r == 0) |
| return 0; |
| |
| if (route_needs_convert(route)) { |
| r = route_convert(link->manager, route, &converted); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to convert route: %m"); |
| |
| assert(r > 0); |
| assert(converted); |
| |
| for (size_t i = 0; i < converted->n; i++) { |
| Route *existing; |
| |
| if (route_get(link->manager, converted->links[i] ?: link, converted->routes[i], &existing) < 0) { |
| _cleanup_(route_freep) Route *tmp = NULL; |
| |
| r = route_dup(converted->routes[i], &tmp); |
| if (r < 0) |
| return log_oom(); |
| |
| r = route_add(link->manager, converted->links[i] ?: link, tmp); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to add route: %m"); |
| |
| TAKE_PTR(tmp); |
| } else { |
| existing->source = converted->routes[i]->source; |
| existing->provider = converted->routes[i]->provider; |
| } |
| } |
| } |
| |
| usec_t now_usec; |
| assert_se(sd_event_now(link->manager->event, CLOCK_BOOTTIME, &now_usec) >= 0); |
| uint32_t sec = usec_to_sec(route->lifetime_usec, now_usec); |
| if (sec == 0) { |
| log_link_debug(link, "Refuse to configure %s route with zero lifetime.", |
| network_config_source_to_string(route->source)); |
| |
| if (converted) |
| for (size_t i = 0; i < converted->n; i++) { |
| Route *existing; |
| |
| assert_se(route_get(link->manager, converted->links[i] ?: link, converted->routes[i], &existing) >= 0); |
| route_cancel_requesting(existing); |
| } |
| else |
| route_cancel_requesting(route); |
| |
| return 1; |
| } |
| |
| r = route_configure(route, sec, link, req); |
| if (r < 0) |
| return log_link_warning_errno(link, r, "Failed to configure route: %m"); |
| |
| if (converted) |
| for (size_t i = 0; i < converted->n; i++) { |
| Route *existing; |
| |
| assert_se(route_get(link->manager, converted->links[i] ?: link, converted->routes[i], &existing) >= 0); |
| route_enter_configuring(existing); |
| } |
| else |
| route_enter_configuring(route); |
| |
| return 1; |
| } |
| |
| int link_request_route( |
| Link *link, |
| Route *route, |
| bool consume_object, |
| unsigned *message_counter, |
| route_netlink_handler_t netlink_handler, |
| Request **ret) { |
| |
| Route *existing = NULL; |
| int r; |
| |
| assert(link); |
| assert(link->manager); |
| assert(route); |
| assert(route->source != NETWORK_CONFIG_SOURCE_FOREIGN); |
| assert(!route_needs_convert(route)); |
| |
| (void) route_get(link->manager, link, route, &existing); |
| |
| if (route->lifetime_usec == 0) { |
| if (consume_object) |
| route_free(route); |
| |
| /* The requested route is outdated. Let's remove it. */ |
| return route_remove_and_drop(existing); |
| } |
| |
| if (!existing) { |
| _cleanup_(route_freep) Route *tmp = NULL; |
| |
| if (consume_object) |
| tmp = route; |
| else { |
| r = route_dup(route, &tmp); |
| if (r < 0) |
| return r; |
| } |
| |
| r = route_add(link->manager, link, tmp); |
| if (r < 0) |
| return r; |
| |
| existing = TAKE_PTR(tmp); |
| } else { |
| existing->source = route->source; |
| existing->provider = route->provider; |
| existing->lifetime_usec = route->lifetime_usec; |
| if (consume_object) |
| route_free(route); |
| |
| if (existing->expire) { |
| /* When re-configuring an existing route, kernel does not send RTM_NEWROUTE |
| * message, so we need to update the timer here. */ |
| r = route_setup_timer(existing, NULL); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Failed to update expiration timer for route, ignoring: %m"); |
| if (r > 0) |
| log_route_debug(existing, "Updated expiration timer for", link, link->manager); |
| } |
| } |
| |
| log_route_debug(existing, "Requesting", link, link->manager); |
| r = link_queue_request_safe(link, REQUEST_TYPE_ROUTE, |
| existing, NULL, |
| route_hash_func, |
| route_compare_func, |
| route_process_request, |
| message_counter, netlink_handler, ret); |
| if (r <= 0) |
| return r; |
| |
| route_enter_requesting(existing); |
| return 1; |
| } |
| |
| static int static_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, Route *route) { |
| int r; |
| |
| assert(link); |
| |
| r = route_configure_handler_internal(rtnl, m, link, "Could not set route"); |
| if (r <= 0) |
| return r; |
| |
| if (link->static_route_messages == 0) { |
| log_link_debug(link, "Routes set"); |
| link->static_routes_configured = true; |
| link_check_ready(link); |
| } |
| |
| return 1; |
| } |
| |
| static int link_request_static_route(Link *link, Route *route) { |
| assert(link); |
| assert(link->manager); |
| assert(route); |
| |
| if (!route_needs_convert(route)) |
| return link_request_route(link, route, false, &link->static_route_messages, |
| static_route_handler, NULL); |
| |
| log_route_debug(route, "Requesting", link, link->manager); |
| return link_queue_request_safe(link, REQUEST_TYPE_ROUTE, |
| route, NULL, route_hash_func, route_compare_func, |
| route_process_request, |
| &link->static_route_messages, static_route_handler, NULL); |
| } |
| |
| static int link_request_wireguard_routes(Link *link, bool only_ipv4) { |
| NetDev *netdev; |
| Wireguard *w; |
| Route *route; |
| int r; |
| |
| assert(link); |
| |
| if (!streq_ptr(link->kind, "wireguard")) |
| return 0; |
| |
| if (netdev_get(link->manager, link->ifname, &netdev) < 0) |
| return 0; |
| |
| w = WIREGUARD(netdev); |
| if (!w) |
| return 0; |
| |
| SET_FOREACH(route, w->routes) { |
| if (only_ipv4 && route->family != AF_INET) |
| continue; |
| |
| r = link_request_static_route(link, route); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| int link_request_static_routes(Link *link, bool only_ipv4) { |
| Route *route; |
| int r; |
| |
| assert(link); |
| assert(link->network); |
| |
| link->static_routes_configured = false; |
| |
| HASHMAP_FOREACH(route, link->network->routes_by_section) { |
| if (route->gateway_from_dhcp_or_ra) |
| continue; |
| |
| if (only_ipv4 && route->family != AF_INET) |
| continue; |
| |
| r = link_request_static_route(link, route); |
| if (r < 0) |
| return r; |
| } |
| |
| r = link_request_wireguard_routes(link, only_ipv4); |
| if (r < 0) |
| return r; |
| |
| if (link->static_route_messages == 0) { |
| link->static_routes_configured = true; |
| link_check_ready(link); |
| } else { |
| log_link_debug(link, "Requesting routes"); |
| link_set_state(link, LINK_STATE_CONFIGURING); |
| } |
| |
| return 0; |
| } |
| |
| void route_cancel_request(Route *route, Link *link) { |
| Request req; |
| |
| assert(route); |
| |
| link = route->link ?: link; |
| |
| assert(link); |
| |
| if (!route_is_requesting(route)) |
| return; |
| |
| req = (Request) { |
| .link = link, |
| .type = REQUEST_TYPE_ROUTE, |
| .userdata = route, |
| .hash_func = (hash_func_t) route_hash_func, |
| .compare_func = (compare_func_t) route_compare_func, |
| }; |
| |
| request_detach(link->manager, &req); |
| route_cancel_requesting(route); |
| } |
| |
| static int process_route_one( |
| Manager *manager, |
| Link *link, |
| uint16_t type, |
| Route *in, |
| const struct rta_cacheinfo *cacheinfo) { |
| |
| _cleanup_(route_freep) Route *tmp = in; |
| Route *route = NULL; |
| int r; |
| |
| assert(manager); |
| assert(tmp); |
| assert(IN_SET(type, RTM_NEWROUTE, RTM_DELROUTE)); |
| |
| /* link may be NULL. This consumes 'in'. */ |
| |
| (void) route_get(manager, link, tmp, &route); |
| |
| switch (type) { |
| case RTM_NEWROUTE: |
| if (route) { |
| route->flags = tmp->flags; |
| route_enter_configured(route); |
| log_route_debug(route, "Received remembered", link, manager); |
| |
| r = route_setup_timer(route, cacheinfo); |
| if (r < 0) |
| log_link_warning_errno(link, r, "Failed to configure expiration timer for route, ignoring: %m"); |
| if (r > 0) |
| log_route_debug(route, "Configured expiration timer for", link, manager); |
| |
| } else if (!manager->manage_foreign_routes) { |
| route_enter_configured(tmp); |
| log_route_debug(tmp, "Ignoring received", link, manager); |
| |
| } else { |
| /* A route appeared that we did not request */ |
| route_enter_configured(tmp); |
| log_route_debug(tmp, "Received new", link, manager); |
| r = route_add(manager, link, tmp); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "Failed to remember foreign route, ignoring: %m"); |
| return 0; |
| } |
| TAKE_PTR(tmp); |
| } |
| |
| break; |
| |
| case RTM_DELROUTE: |
| if (route) { |
| route_enter_removed(route); |
| if (route->state == 0) { |
| log_route_debug(route, "Forgetting", link, manager); |
| route_free(route); |
| } else |
| log_route_debug(route, "Removed", link, manager); |
| } else |
| log_route_debug(tmp, |
| manager->manage_foreign_routes ? "Kernel removed unknown" : "Ignoring received", |
| link, manager); |
| |
| break; |
| |
| default: |
| assert_not_reached(); |
| } |
| |
| return 1; |
| } |
| |
| int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) { |
| _cleanup_(converted_routes_freep) ConvertedRoutes *converted = NULL; |
| _cleanup_(route_freep) Route *tmp = NULL; |
| _cleanup_free_ void *rta_multipath = NULL; |
| struct rta_cacheinfo cacheinfo; |
| bool has_cacheinfo; |
| Link *link = NULL; |
| uint32_t ifindex; |
| uint16_t type; |
| size_t rta_len; |
| int r; |
| |
| assert(rtnl); |
| assert(message); |
| assert(m); |
| |
| if (sd_netlink_message_is_error(message)) { |
| r = sd_netlink_message_get_errno(message); |
| if (r < 0) |
| log_message_warning_errno(message, r, "rtnl: failed to receive route message, ignoring"); |
| |
| return 0; |
| } |
| |
| r = sd_netlink_message_get_type(message, &type); |
| if (r < 0) { |
| log_warning_errno(r, "rtnl: could not get message type, ignoring: %m"); |
| return 0; |
| } else if (!IN_SET(type, RTM_NEWROUTE, RTM_DELROUTE)) { |
| log_warning("rtnl: received unexpected message type %u when processing route, ignoring.", type); |
| return 0; |
| } |
| |
| r = sd_netlink_message_read_u32(message, RTA_OIF, &ifindex); |
| if (r < 0 && r != -ENODATA) { |
| log_warning_errno(r, "rtnl: could not get ifindex from route message, ignoring: %m"); |
| return 0; |
| } else if (r >= 0) { |
| if (ifindex <= 0) { |
| log_warning("rtnl: received route message with invalid ifindex %u, ignoring.", ifindex); |
| return 0; |
| } |
| |
| r = link_get_by_index(m, ifindex, &link); |
| if (r < 0 || !link) { |
| /* when enumerating we might be out of sync, but we will |
| * get the route again, so just ignore it */ |
| if (!m->enumerating) |
| log_warning("rtnl: received route message for link (%u) we do not know about, ignoring", ifindex); |
| return 0; |
| } |
| } |
| |
| r = route_new(&tmp); |
| if (r < 0) |
| return log_oom(); |
| |
| r = sd_rtnl_message_route_get_family(message, &tmp->family); |
| if (r < 0) { |
| log_link_warning(link, "rtnl: received route message without family, ignoring"); |
| return 0; |
| } else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) { |
| log_link_debug(link, "rtnl: received route message with invalid family '%i', ignoring", tmp->family); |
| return 0; |
| } |
| |
| r = sd_rtnl_message_route_get_protocol(message, &tmp->protocol); |
| if (r < 0) { |
| log_warning_errno(r, "rtnl: received route message without route protocol, ignoring: %m"); |
| return 0; |
| } |
| |
| r = sd_rtnl_message_route_get_flags(message, &tmp->flags); |
| if (r < 0) { |
| log_warning_errno(r, "rtnl: received route message without route flags, ignoring: %m"); |
| return 0; |
| } |
| |
| r = netlink_message_read_in_addr_union(message, RTA_DST, tmp->family, &tmp->dst); |
| if (r < 0 && r != -ENODATA) { |
| log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m"); |
| return 0; |
| } |
| |
| r = netlink_message_read_in_addr_union(message, RTA_GATEWAY, tmp->family, &tmp->gw); |
| if (r < 0 && r != -ENODATA) { |
| log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m"); |
| return 0; |
| } else if (r >= 0) |
| tmp->gw_family = tmp->family; |
| else if (tmp->family == AF_INET) { |
| RouteVia via; |
| |
| r = sd_netlink_message_read(message, RTA_VIA, sizeof(via), &via); |
| if (r < 0 && r != -ENODATA) { |
| log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m"); |
| return 0; |
| } else if (r >= 0) { |
| tmp->gw_family = via.family; |
| tmp->gw = via.address; |
| } |
| } |
| |
| r = netlink_message_read_in_addr_union(message, RTA_SRC, tmp->family, &tmp->src); |
| if (r < 0 && r != -ENODATA) { |
| log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m"); |
| return 0; |
| } |
| |
| r = netlink_message_read_in_addr_union(message, RTA_PREFSRC, tmp->family, &tmp->prefsrc); |
| if (r < 0 && r != -ENODATA) { |
| log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m"); |
| return 0; |
| } |
| |
| r = sd_rtnl_message_route_get_dst_prefixlen(message, &tmp->dst_prefixlen); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "rtnl: received route message with invalid destination prefixlen, ignoring: %m"); |
| return 0; |
| } |
| |
| r = sd_rtnl_message_route_get_src_prefixlen(message, &tmp->src_prefixlen); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "rtnl: received route message with invalid source prefixlen, ignoring: %m"); |
| return 0; |
| } |
| |
| r = sd_rtnl_message_route_get_scope(message, &tmp->scope); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "rtnl: received route message with invalid scope, ignoring: %m"); |
| return 0; |
| } |
| |
| r = sd_rtnl_message_route_get_tos(message, &tmp->tos); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "rtnl: received route message with invalid tos, ignoring: %m"); |
| return 0; |
| } |
| |
| r = sd_rtnl_message_route_get_type(message, &tmp->type); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "rtnl: received route message with invalid type, ignoring: %m"); |
| return 0; |
| } |
| |
| r = sd_netlink_message_read_u32(message, RTA_TABLE, &tmp->table); |
| if (r == -ENODATA) { |
| unsigned char table; |
| |
| r = sd_rtnl_message_route_get_table(message, &table); |
| if (r >= 0) |
| tmp->table = table; |
| } |
| if (r < 0) { |
| log_link_warning_errno(link, r, "rtnl: received route message with invalid table, ignoring: %m"); |
| return 0; |
| } |
| |
| r = sd_netlink_message_read_u32(message, RTA_PRIORITY, &tmp->priority); |
| if (r < 0 && r != -ENODATA) { |
| log_link_warning_errno(link, r, "rtnl: received route message with invalid priority, ignoring: %m"); |
| return 0; |
| } |
| |
| r = sd_netlink_message_read_u32(message, RTA_NH_ID, &tmp->nexthop_id); |
| if (r < 0 && r != -ENODATA) { |
| log_link_warning_errno(link, r, "rtnl: received route message with invalid nexthop id, ignoring: %m"); |
| return 0; |
| } |
| |
| r = sd_netlink_message_enter_container(message, RTA_METRICS); |
| if (r < 0 && r != -ENODATA) { |
| log_link_error_errno(link, r, "rtnl: Could not enter RTA_METRICS container, ignoring: %m"); |
| return 0; |
| } |
| if (r >= 0) { |
| r = sd_netlink_message_read_u32(message, RTAX_INITCWND, &tmp->initcwnd); |
| if (r < 0 && r != -ENODATA) { |
| log_link_warning_errno(link, r, "rtnl: received route message with invalid initcwnd, ignoring: %m"); |
| return 0; |
| } |
| |
| r = sd_netlink_message_read_u32(message, RTAX_INITRWND, &tmp->initrwnd); |
| if (r < 0 && r != -ENODATA) { |
| log_link_warning_errno(link, r, "rtnl: received route message with invalid initrwnd, ignoring: %m"); |
| return 0; |
| } |
| |
| r = sd_netlink_message_read_u32(message, RTAX_ADVMSS, &tmp->advmss); |
| if (r < 0 && r != -ENODATA) { |
| log_link_warning_errno(link, r, "rtnl: received route message with invalid advmss, ignoring: %m"); |
| return 0; |
| } |
| |
| r = sd_netlink_message_exit_container(message); |
| if (r < 0) { |
| log_link_error_errno(link, r, "rtnl: Could not exit from RTA_METRICS container, ignoring: %m"); |
| return 0; |
| } |
| } |
| |
| r = sd_netlink_message_read_data(message, RTA_MULTIPATH, &rta_len, &rta_multipath); |
| if (r < 0 && r != -ENODATA) { |
| log_link_warning_errno(link, r, "rtnl: failed to read RTA_MULTIPATH attribute, ignoring: %m"); |
| return 0; |
| } else if (r >= 0) { |
| r = rtattr_read_nexthop(rta_multipath, rta_len, tmp->family, &tmp->multipath_routes); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "rtnl: failed to parse RTA_MULTIPATH attribute, ignoring: %m"); |
| return 0; |
| } |
| } |
| |
| r = sd_netlink_message_read(message, RTA_CACHEINFO, sizeof(cacheinfo), &cacheinfo); |
| if (r < 0 && r != -ENODATA) { |
| log_link_warning_errno(link, r, "rtnl: failed to read RTA_CACHEINFO attribute, ignoring: %m"); |
| return 0; |
| } |
| has_cacheinfo = r >= 0; |
| |
| /* IPv6 routes with reject type are always assigned to the loopback interface. See kernel's |
| * fib6_nh_init() in net/ipv6/route.c. However, we'd like to manage them by Manager. Hence, set |
| * link to NULL here. */ |
| if (route_type_is_reject(tmp)) |
| link = NULL; |
| |
| if (!route_needs_convert(tmp)) |
| return process_route_one(m, link, type, TAKE_PTR(tmp), has_cacheinfo ? &cacheinfo : NULL); |
| |
| r = route_convert(m, tmp, &converted); |
| if (r < 0) { |
| log_link_warning_errno(link, r, "rtnl: failed to convert received route, ignoring: %m"); |
| return 0; |
| } |
| |
| assert(r > 0); |
| assert(converted); |
| |
| for (size_t i = 0; i < converted->n; i++) |
| (void) process_route_one(m, |
| converted->links[i] ?: link, |
| type, |
| TAKE_PTR(converted->routes[i]), |
| has_cacheinfo ? &cacheinfo : NULL); |
| |
| return 1; |
| } |
| |
| int network_add_ipv4ll_route(Network *network) { |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| unsigned section_line; |
| int r; |
| |
| assert(network); |
| |
| if (!network->ipv4ll_route) |
| return 0; |
| |
| section_line = hashmap_find_free_section_line(network->routes_by_section); |
| |
| /* IPv4LLRoute= is in [Network] section. */ |
| r = route_new_static(network, network->filename, section_line, &n); |
| if (r < 0) |
| return r; |
| |
| r = in_addr_from_string(AF_INET, "169.254.0.0", &n->dst); |
| if (r < 0) |
| return r; |
| |
| n->family = AF_INET; |
| n->dst_prefixlen = 16; |
| n->scope = RT_SCOPE_LINK; |
| n->scope_set = true; |
| n->table_set = true; |
| n->priority = IPV4LL_ROUTE_METRIC; |
| n->protocol = RTPROT_STATIC; |
| |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int network_add_default_route_on_device(Network *network) { |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| unsigned section_line; |
| int r; |
| |
| assert(network); |
| |
| if (!network->default_route_on_device) |
| return 0; |
| |
| section_line = hashmap_find_free_section_line(network->routes_by_section); |
| |
| /* DefaultRouteOnDevice= is in [Network] section. */ |
| r = route_new_static(network, network->filename, section_line, &n); |
| if (r < 0) |
| return r; |
| |
| n->family = AF_INET; |
| n->scope = RT_SCOPE_LINK; |
| n->scope_set = true; |
| n->protocol = RTPROT_STATIC; |
| |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_gateway( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Network *network = userdata; |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| int r; |
| |
| assert(filename); |
| assert(section); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| if (streq(section, "Network")) { |
| /* we are not in an Route section, so use line number instead */ |
| r = route_new_static(network, filename, line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| } else { |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| if (isempty(rvalue)) { |
| n->gateway_from_dhcp_or_ra = false; |
| n->gw_family = AF_UNSPEC; |
| n->gw = IN_ADDR_NULL; |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| if (streq(rvalue, "_dhcp")) { |
| n->gateway_from_dhcp_or_ra = true; |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| if (streq(rvalue, "_dhcp4")) { |
| n->gw_family = AF_INET; |
| n->gateway_from_dhcp_or_ra = true; |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| if (streq(rvalue, "_ipv6ra")) { |
| n->gw_family = AF_INET6; |
| n->gateway_from_dhcp_or_ra = true; |
| TAKE_PTR(n); |
| return 0; |
| } |
| } |
| |
| r = in_addr_from_string_auto(rvalue, &n->gw_family, &n->gw); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Invalid %s='%s', ignoring assignment: %m", lvalue, rvalue); |
| return 0; |
| } |
| |
| n->gateway_from_dhcp_or_ra = false; |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_preferred_src( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Network *network = userdata; |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| int r; |
| |
| assert(filename); |
| assert(section); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| if (n->family == AF_UNSPEC) |
| r = in_addr_from_string_auto(rvalue, &n->family, &n->prefsrc); |
| else |
| r = in_addr_from_string(n->family, rvalue, &n->prefsrc); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, EINVAL, |
| "Invalid %s='%s', ignoring assignment: %m", lvalue, rvalue); |
| return 0; |
| } |
| |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_destination( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Network *network = userdata; |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| union in_addr_union *buffer; |
| unsigned char *prefixlen; |
| int r; |
| |
| assert(filename); |
| assert(section); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| if (streq(lvalue, "Destination")) { |
| buffer = &n->dst; |
| prefixlen = &n->dst_prefixlen; |
| } else if (streq(lvalue, "Source")) { |
| buffer = &n->src; |
| prefixlen = &n->src_prefixlen; |
| } else |
| assert_not_reached(); |
| |
| if (n->family == AF_UNSPEC) |
| r = in_addr_prefix_from_string_auto(rvalue, &n->family, buffer, prefixlen); |
| else |
| r = in_addr_prefix_from_string(rvalue, n->family, buffer, prefixlen); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, EINVAL, |
| "Invalid %s='%s', ignoring assignment: %m", lvalue, rvalue); |
| return 0; |
| } |
| |
| (void) in_addr_mask(n->family, buffer, *prefixlen); |
| |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_route_priority( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Network *network = userdata; |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| int r; |
| |
| assert(filename); |
| assert(section); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| r = safe_atou32(rvalue, &n->priority); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Could not parse route priority \"%s\", ignoring assignment: %m", rvalue); |
| return 0; |
| } |
| |
| n->priority_set = true; |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_route_scope( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Network *network = userdata; |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| int r; |
| |
| assert(filename); |
| assert(section); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| r = route_scope_from_string(rvalue); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, "Unknown route scope: %s", rvalue); |
| return 0; |
| } |
| |
| n->scope = r; |
| n->scope_set = true; |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_route_nexthop( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Network *network = userdata; |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| uint32_t id; |
| int r; |
| |
| assert(filename); |
| assert(section); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| if (isempty(rvalue)) { |
| n->nexthop_id = 0; |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| r = safe_atou32(rvalue, &id); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse nexthop ID, ignoring assignment: %s", rvalue); |
| return 0; |
| } |
| if (id == 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid nexthop ID, ignoring assignment: %s", rvalue); |
| return 0; |
| } |
| |
| n->nexthop_id = id; |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_route_table( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| Network *network = userdata; |
| int r; |
| |
| assert(filename); |
| assert(section); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| r = manager_get_route_table_from_string(network->manager, rvalue, &n->table); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Could not parse route table \"%s\", ignoring assignment: %m", rvalue); |
| return 0; |
| } |
| |
| n->table_set = true; |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_route_boolean( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Network *network = userdata; |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| int r; |
| |
| assert(filename); |
| assert(section); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| r = parse_boolean(rvalue); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Could not parse %s=\"%s\", ignoring assignment: %m", lvalue, rvalue); |
| return 0; |
| } |
| |
| if (STR_IN_SET(lvalue, "GatewayOnLink", "GatewayOnlink")) |
| n->gateway_onlink = r; |
| else if (streq(lvalue, "QuickAck")) |
| n->quickack = r; |
| else if (streq(lvalue, "FastOpenNoCookie")) |
| n->fast_open_no_cookie = r; |
| else if (streq(lvalue, "TTLPropagate")) |
| n->ttl_propagate = r; |
| else |
| assert_not_reached(); |
| |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_ipv6_route_preference( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Network *network = userdata; |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| int r; |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| if (streq(rvalue, "low")) |
| n->pref = ICMPV6_ROUTER_PREF_LOW; |
| else if (streq(rvalue, "medium")) |
| n->pref = ICMPV6_ROUTER_PREF_MEDIUM; |
| else if (streq(rvalue, "high")) |
| n->pref = ICMPV6_ROUTER_PREF_HIGH; |
| else { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown route preference: %s", rvalue); |
| return 0; |
| } |
| |
| n->pref_set = true; |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_route_protocol( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Network *network = userdata; |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| int r; |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| r = route_protocol_from_string(rvalue); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to parse route protocol \"%s\", ignoring assignment: %m", rvalue); |
| return 0; |
| } |
| |
| n->protocol = r; |
| |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_route_type( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Network *network = userdata; |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| int t, r; |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| t = route_type_from_string(rvalue); |
| if (t < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Could not parse route type \"%s\", ignoring assignment: %m", rvalue); |
| return 0; |
| } |
| |
| n->type = (unsigned char) t; |
| |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_tcp_congestion( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Network *network = userdata; |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| int r; |
| |
| assert(filename); |
| assert(section); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| r = config_parse_string(unit, filename, line, section, section_line, lvalue, ltype, |
| rvalue, &n->tcp_congestion_control_algo, userdata); |
| if (r < 0) |
| return r; |
| |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_tcp_advmss( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| Network *network = userdata; |
| uint64_t u; |
| int r; |
| |
| assert(filename); |
| assert(section); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| if (isempty(rvalue)) { |
| n->advmss = 0; |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| r = parse_size(rvalue, 1024, &u); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Could not parse TCPAdvertisedMaximumSegmentSize= \"%s\", ignoring assignment: %m", rvalue); |
| return 0; |
| } |
| |
| if (u == 0 || u > UINT32_MAX) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Invalid TCPAdvertisedMaximumSegmentSize= \"%s\", ignoring assignment: %m", rvalue); |
| return 0; |
| } |
| |
| n->advmss = u; |
| |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_tcp_window( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| Network *network = userdata; |
| uint32_t k; |
| int r; |
| |
| assert(filename); |
| assert(section); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| r = safe_atou32(rvalue, &k); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Could not parse TCP %s \"%s\", ignoring assignment: %m", lvalue, rvalue); |
| return 0; |
| } |
| if (k >= 1024) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Specified TCP %s \"%s\" is too large, ignoring assignment: %m", lvalue, rvalue); |
| return 0; |
| } |
| if (k == 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Invalid TCP %s \"%s\", ignoring assignment: %m", lvalue, rvalue); |
| return 0; |
| } |
| |
| if (streq(lvalue, "InitialCongestionWindow")) |
| n->initcwnd = k; |
| else if (streq(lvalue, "InitialAdvertisedReceiveWindow")) |
| n->initrwnd = k; |
| else |
| assert_not_reached(); |
| |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_route_mtu( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| Network *network = userdata; |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| int r; |
| |
| assert(filename); |
| assert(section); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| r = config_parse_mtu(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &n->mtu, userdata); |
| if (r < 0) |
| return r; |
| |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| int config_parse_multipath_route( |
| const char *unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| _cleanup_(multipath_route_freep) MultipathRoute *m = NULL; |
| _cleanup_(route_free_or_set_invalidp) Route *n = NULL; |
| _cleanup_free_ char *word = NULL; |
| Network *network = userdata; |
| union in_addr_union a; |
| int family, r; |
| const char *p; |
| char *dev; |
| |
| assert(filename); |
| assert(section); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| r = route_new_static(network, filename, section_line, &n); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to allocate route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| if (isempty(rvalue)) { |
| n->multipath_routes = ordered_set_free_with_destructor(n->multipath_routes, multipath_route_free); |
| return 0; |
| } |
| |
| m = new0(MultipathRoute, 1); |
| if (!m) |
| return log_oom(); |
| |
| p = rvalue; |
| r = extract_first_word(&p, &word, NULL, 0); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r <= 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Invalid multipath route option, ignoring assignment: %s", rvalue); |
| return 0; |
| } |
| |
| dev = strchr(word, '@'); |
| if (dev) { |
| *dev++ = '\0'; |
| |
| r = parse_ifindex(dev); |
| if (r > 0) |
| m->ifindex = r; |
| else { |
| if (!ifname_valid_full(dev, IFNAME_VALID_ALTERNATIVE)) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Invalid interface name '%s' in %s=, ignoring: %s", dev, lvalue, rvalue); |
| return 0; |
| } |
| |
| m->ifname = strdup(dev); |
| if (!m->ifname) |
| return log_oom(); |
| } |
| } |
| |
| r = in_addr_from_string_auto(word, &family, &a); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Invalid multipath route gateway '%s', ignoring assignment: %m", rvalue); |
| return 0; |
| } |
| m->gateway.address = a; |
| m->gateway.family = family; |
| |
| if (!isempty(p)) { |
| r = safe_atou32(p, &m->weight); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Invalid multipath route weight, ignoring assignment: %s", p); |
| return 0; |
| } |
| /* ip command takes weight in the range 1…255, while kernel takes the value in the |
| * range 0…254. MultiPathRoute= setting also takes weight in the same range which ip |
| * command uses, then networkd decreases by one and stores it to match the range which |
| * kernel uses. */ |
| if (m->weight == 0 || m->weight > 256) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Invalid multipath route weight, ignoring assignment: %s", p); |
| return 0; |
| } |
| m->weight--; |
| } |
| |
| r = ordered_set_ensure_put(&n->multipath_routes, NULL, m); |
| if (r == -ENOMEM) |
| return log_oom(); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to store multipath route, ignoring assignment: %m"); |
| return 0; |
| } |
| |
| TAKE_PTR(m); |
| TAKE_PTR(n); |
| return 0; |
| } |
| |
| static int route_section_verify(Route *route, Network *network) { |
| if (section_is_invalid(route->section)) |
| return -EINVAL; |
| |
| /* Currently, we do not support static route with finite lifetime. */ |
| assert(route->lifetime_usec == USEC_INFINITY); |
| |
| if (route->gateway_from_dhcp_or_ra) { |
| if (route->gw_family == AF_UNSPEC) { |
| /* When deprecated Gateway=_dhcp is set, then assume gateway family based on other settings. */ |
| switch (route->family) { |
| case AF_UNSPEC: |
| log_warning("%s: Deprecated value \"_dhcp\" is specified for Gateway= in [Route] section from line %u. " |
| "Please use \"_dhcp4\" or \"_ipv6ra\" instead. Assuming \"_dhcp4\".", |
| route->section->filename, route->section->line); |
| route->family = AF_INET; |
| break; |
| case AF_INET: |
| case AF_INET6: |
| log_warning("%s: Deprecated value \"_dhcp\" is specified for Gateway= in [Route] section from line %u. " |
| "Assuming \"%s\" based on Destination=, Source=, or PreferredSource= setting.", |
| route->section->filename, route->section->line, route->family == AF_INET ? "_dhcp4" : "_ipv6ra"); |
| break; |
| default: |
| return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), |
| "%s: Invalid route family. Ignoring [Route] section from line %u.", |
| route->section->filename, route->section->line); |
| } |
| route->gw_family = route->family; |
| } |
| |
| if (route->gw_family == AF_INET && !FLAGS_SET(network->dhcp, ADDRESS_FAMILY_IPV4)) |
| return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), |
| "%s: Gateway=\"_dhcp4\" is specified but DHCPv4 client is disabled. " |
| "Ignoring [Route] section from line %u.", |
| route->section->filename, route->section->line); |
| |
| if (route->gw_family == AF_INET6 && !network->ipv6_accept_ra) |
| return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), |
| "%s: Gateway=\"_ipv6ra\" is specified but IPv6AcceptRA= is disabled. " |
| "Ignoring [Route] section from line %u.", |
| route->section->filename, route->section->line); |
| } |
| |
| /* When only Gateway= is specified, assume the route family based on the Gateway address. */ |
| if (route->family == AF_UNSPEC) |
| route->family = route->gw_family; |
| |
| if (route->family == AF_UNSPEC) { |
| assert(route->section); |
| |
| return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), |
| "%s: Route section without Gateway=, Destination=, Source=, " |
| "or PreferredSource= field configured. " |
| "Ignoring [Route] section from line %u.", |
| route->section->filename, route->section->line); |
| } |
| |
| if (route->family == AF_INET6 && route->gw_family == AF_INET) |
| return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), |
| "%s: IPv4 gateway is configured for IPv6 route. " |
| "Ignoring [Route] section from line %u.", |
| route->section->filename, route->section->line); |
| |
| if (!route->table_set && network->vrf) { |
| route->table = VRF(network->vrf)->table; |
| route->table_set = true; |
| } |
| |
| if (!route->table_set && IN_SET(route->type, RTN_LOCAL, RTN_BROADCAST, RTN_ANYCAST, RTN_NAT)) |
| route->table = RT_TABLE_LOCAL; |
| |
| if (!route->scope_set && route->family != AF_INET6) { |
| if (IN_SET(route->type, RTN_LOCAL, RTN_NAT)) |
| route->scope = RT_SCOPE_HOST; |
| else if (IN_SET(route->type, RTN_BROADCAST, RTN_ANYCAST, RTN_MULTICAST)) |
| route->scope = RT_SCOPE_LINK; |
| else if (IN_SET(route->type, RTN_UNICAST, RTN_UNSPEC) && |
| !route->gateway_from_dhcp_or_ra && |
| !in_addr_is_set(route->gw_family, &route->gw) && |
| ordered_set_isempty(route->multipath_routes) && |
| route->nexthop_id == 0) |
| route->scope = RT_SCOPE_LINK; |
| } |
| |
| if (route->scope != RT_SCOPE_UNIVERSE && route->family == AF_INET6) { |
| log_warning("%s: Scope= is specified for IPv6 route. It will be ignored.", route->section->filename); |
| route->scope = RT_SCOPE_UNIVERSE; |
| } |
| |
| if (route->family == AF_INET6 && route->priority == 0) |
| route->priority = IP6_RT_PRIO_USER; |
| |
| if (route->gateway_onlink < 0 && in_addr_is_set(route->gw_family, &route->gw) && |
| ordered_hashmap_isempty(network->addresses_by_section)) { |
| /* If no address is configured, in most cases the gateway cannot be reachable. |
| * TODO: we may need to improve the condition above. */ |
| log_warning("%s: Gateway= without static address configured. " |
| "Enabling GatewayOnLink= option.", |
| network->filename); |
| route->gateway_onlink = true; |
| } |
| |
| if (route->gateway_onlink >= 0) |
| SET_FLAG(route->flags, RTNH_F_ONLINK, route->gateway_onlink); |
| |
| if (route->family == AF_INET6) { |
| MultipathRoute *m; |
| |
| ORDERED_SET_FOREACH(m, route->multipath_routes) |
| if (m->gateway.family == AF_INET) |
| return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), |
| "%s: IPv4 multipath route is specified for IPv6 route. " |
| "Ignoring [Route] section from line %u.", |
| route->section->filename, route->section->line); |
| } |
| |
| if ((route->gateway_from_dhcp_or_ra || |
| in_addr_is_set(route->gw_family, &route->gw)) && |
| !ordered_set_isempty(route->multipath_routes)) |
| return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), |
| "%s: Gateway= cannot be specified with MultiPathRoute=. " |
| "Ignoring [Route] section from line %u.", |
| route->section->filename, route->section->line); |
| |
| if (route->nexthop_id > 0 && |
| (route->gateway_from_dhcp_or_ra || |
| in_addr_is_set(route->gw_family, &route->gw) || |
| !ordered_set_isempty(route->multipath_routes))) |
| return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), |
| "%s: NextHopId= cannot be specified with Gateway= or MultiPathRoute=. " |
| "Ignoring [Route] section from line %u.", |
| route->section->filename, route->section->line); |
| |
| return 0; |
| } |
| |
| void network_drop_invalid_routes(Network *network) { |
| Route *route; |
| |
| assert(network); |
| |
| HASHMAP_FOREACH(route, network->routes_by_section) |
| if (route_section_verify(route, network) < 0) |
| route_free(route); |
| } |