/* SPDX-License-Identifier: LGPL-2.1+ */ #include #include "alloc-util.h" #include "conf-parser.h" #include "in-addr-util.h" #include "missing_network.h" #include "netlink-util.h" #include "networkd-ipv4ll.h" #include "networkd-manager.h" #include "networkd-route.h" #include "parse-util.h" #include "set.h" #include "socket-netlink.h" #include "string-table.h" #include "string-util.h" #include "strxcpyx.h" #include "sysctl-util.h" #include "vrf.h" #define ROUTES_DEFAULT_MAX_PER_FAMILY 4096U static unsigned routes_max(void) { static thread_local unsigned cached = 0; _cleanup_free_ char *s4 = NULL, *s6 = NULL; unsigned val4 = ROUTES_DEFAULT_MAX_PER_FAMILY, val6 = ROUTES_DEFAULT_MAX_PER_FAMILY; if (cached > 0) return cached; if (sysctl_read("net/ipv4/route/max_size", &s4) >= 0) { truncate_nl(s4); if (safe_atou(s4, &val4) >= 0 && val4 == 2147483647U) /* This is the default "no limit" value in the kernel */ val4 = ROUTES_DEFAULT_MAX_PER_FAMILY; } if (sysctl_read("net/ipv6/route/max_size", &s6) >= 0) { truncate_nl(s6); (void) safe_atou(s6, &val6); } cached = MAX(ROUTES_DEFAULT_MAX_PER_FAMILY, val4) + MAX(ROUTES_DEFAULT_MAX_PER_FAMILY, val6); return cached; } 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_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_(network_config_section_freep) NetworkConfigSection *n = NULL; _cleanup_(route_freep) Route *route = NULL; int r; assert(network); assert(ret); assert(!!filename == (section_line > 0)); if (filename) { r = network_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 (network->n_static_routes >= routes_max()) return -E2BIG; r = route_new(&route); if (r < 0) return r; route->protocol = RTPROT_STATIC; route->network = network; LIST_PREPEND(routes, network->static_routes, route); network->n_static_routes++; if (filename) { route->section = TAKE_PTR(n); r = hashmap_ensure_allocated(&network->routes_by_section, &network_config_hash_ops); if (r < 0) return r; r = hashmap_put(network->routes_by_section, route->section, route); if (r < 0) return r; } *ret = TAKE_PTR(route); return 0; } void route_free(Route *route) { if (!route) return; if (route->network) { LIST_REMOVE(routes, route->network->static_routes, route); assert(route->network->n_static_routes > 0); route->network->n_static_routes--; if (route->section) hashmap_remove(route->network->routes_by_section, route->section); } network_config_section_free(route->section); if (route->link) { set_remove(route->link->routes, route); set_remove(route->link->routes_foreign, route); } ordered_set_free_free(route->multipath_routes); sd_event_source_unref(route->expire); free(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_ADDRESS_SIZE(route->family), 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); 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 = memcmp(&a->gw, &b->gw, FAMILY_ADDRESS_SIZE(a->family)); 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; 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); bool route_equal(Route *r1, Route *r2) { if (r1 == r2) return true; if (!r1 || !r2) return false; return route_compare_func(r1, r2) == 0; } int route_get(Link *link, Route *in, Route **ret) { Route *existing; assert(link); assert(in); existing = set_get(link->routes, in); if (existing) { if (ret) *ret = existing; return 1; } existing = set_get(link->routes_foreign, in); if (existing) { if (ret) *ret = existing; return 0; } return -ENOENT; } static int route_add_internal(Link *link, Set **routes, Route *in, Route **ret) { _cleanup_(route_freep) Route *route = NULL; int r; assert(link); assert(routes); assert(in); r = route_new(&route); if (r < 0) return r; route->family = in->family; route->src = in->src; route->src_prefixlen = in->src_prefixlen; route->dst = in->dst; route->dst_prefixlen = in->dst_prefixlen; route->gw = in->gw; route->prefsrc = in->prefsrc; route->scope = in->scope; route->protocol = in->protocol; route->type = in->type; route->tos = in->tos; route->priority = in->priority; route->table = in->table; route->initcwnd = in->initcwnd; route->initrwnd = in->initrwnd; route->lifetime = in->lifetime; r = set_ensure_allocated(routes, &route_hash_ops); if (r < 0) return r; r = set_put(*routes, route); if (r < 0) return r; if (r == 0) return -EEXIST; route->link = link; if (ret) *ret = route; route = NULL; return 0; } int route_add_foreign(Link *link, Route *in, Route **ret) { return route_add_internal(link, &link->routes_foreign, in, ret); } int route_add(Link *link, Route *in, Route **ret) { Route *route; int r; r = route_get(link, in, &route); if (r == -ENOENT) { /* Route does not exist, create a new one */ r = route_add_internal(link, &link->routes, in, &route); if (r < 0) return r; } else if (r == 0) { /* Take over a foreign route */ r = set_ensure_allocated(&link->routes, &route_hash_ops); if (r < 0) return r; r = set_put(link->routes, route); if (r < 0) return r; set_remove(link->routes_foreign, route); } else if (r == 1) { /* Route exists, do nothing */ ; } else return r; if (ret) *ret = route; return 0; } static int route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { int r; assert(m); assert(link); assert(link->ifname); if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) return 1; 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, Link *link, link_netlink_message_handler_t callback) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; int r; assert(link); assert(link->manager); assert(link->manager->rtnl); assert(link->ifindex > 0); assert(IN_SET(route->family, AF_INET, AF_INET6)); r = sd_rtnl_message_new_route(link->manager->rtnl, &req, RTM_DELROUTE, route->family, route->protocol); if (r < 0) return log_link_error_errno(link, r, "Could not create RTM_DELROUTE message: %m"); if (DEBUG_LOGGING) { _cleanup_free_ char *dst = NULL, *dst_prefixlen = NULL, *src = NULL, *gw = NULL, *prefsrc = NULL; char scope[ROUTE_SCOPE_STR_MAX], table[ROUTE_TABLE_STR_MAX], protocol[ROUTE_PROTOCOL_STR_MAX]; if (!in_addr_is_null(route->family, &route->dst)) { (void) in_addr_to_string(route->family, &route->dst, &dst); (void) asprintf(&dst_prefixlen, "/%u", route->dst_prefixlen); } if (!in_addr_is_null(route->family, &route->src)) (void) in_addr_to_string(route->family, &route->src, &src); if (!in_addr_is_null(route->family, &route->gw)) (void) in_addr_to_string(route->family, &route->gw, &gw); if (!in_addr_is_null(route->family, &route->prefsrc)) (void) in_addr_to_string(route->family, &route->prefsrc, &prefsrc); log_link_debug(link, "Removing route: dst: %s%s, src: %s, gw: %s, prefsrc: %s, scope: %s, table: %s, proto: %s, type: %s", strna(dst), strempty(dst_prefixlen), strna(src), strna(gw), strna(prefsrc), format_route_scope(route->scope, scope, sizeof(scope)), format_route_table(route->table, table, sizeof(table)), format_route_protocol(route->protocol, protocol, sizeof(protocol)), strna(route_type_to_string(route->type))); } if (in_addr_is_null(route->family, &route->gw) == 0) { r = netlink_message_append_in_addr_union(req, RTA_GATEWAY, route->family, &route->gw); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_GATEWAY attribute: %m"); } if (route->dst_prefixlen) { r = netlink_message_append_in_addr_union(req, RTA_DST, route->family, &route->dst); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_DST attribute: %m"); r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen); if (r < 0) return log_link_error_errno(link, r, "Could not set destination prefix length: %m"); } if (route->src_prefixlen) { r = netlink_message_append_in_addr_union(req, RTA_SRC, route->family, &route->src); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_SRC attribute: %m"); r = sd_rtnl_message_route_set_src_prefixlen(req, route->src_prefixlen); if (r < 0) return log_link_error_errno(link, r, "Could not set source prefix length: %m"); } if (in_addr_is_null(route->family, &route->prefsrc) == 0) { r = netlink_message_append_in_addr_union(req, RTA_PREFSRC, route->family, &route->prefsrc); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_PREFSRC attribute: %m"); } r = sd_rtnl_message_route_set_scope(req, route->scope); if (r < 0) return log_link_error_errno(link, r, "Could not set scope: %m"); r = sd_netlink_message_append_u32(req, RTA_PRIORITY, route->priority); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_PRIORITY attribute: %m"); if (!IN_SET(route->type, RTN_UNREACHABLE, RTN_PROHIBIT, RTN_BLACKHOLE, RTN_THROW)) { r = sd_netlink_message_append_u32(req, RTA_OIF, link->ifindex); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_OIF attribute: %m"); } r = netlink_call_async(link->manager->rtnl, NULL, req, callback ?: route_remove_handler, link_netlink_destroy_callback, link); if (r < 0) return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); link_ref(link); return 0; } int route_expire_handler(sd_event_source *s, uint64_t usec, void *userdata) { Route *route = userdata; int r; assert(route); r = route_remove(route, route->link, NULL); if (r < 0) log_link_warning_errno(route->link, r, "Could not remove route: %m"); else route_free(route); return 1; } static int append_nexthop_one(Route *route, 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, .rtnh_hops = m->weight > 0 ? m->weight - 1 : 0, }; (*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(Route *route, sd_netlink_message *req) { _cleanup_free_ struct rtattr *rta = NULL; struct rtnexthop *rtnh; MultipathRoute *m; size_t offset; Iterator i; int r; 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, i) { r = append_nexthop_one(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( Route *route, Link *link, link_netlink_message_handler_t callback) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL; int r; assert(link); assert(link->manager); assert(link->manager->rtnl); assert(link->ifindex > 0); assert(IN_SET(route->family, AF_INET, AF_INET6)); assert(callback); if (route_get(link, route, NULL) <= 0 && set_size(link->routes) >= routes_max()) return log_link_error_errno(link, SYNTHETIC_ERRNO(E2BIG), "Too many routes are configured, refusing: %m"); if (DEBUG_LOGGING) { _cleanup_free_ char *dst = NULL, *dst_prefixlen = NULL, *src = NULL, *gw = NULL, *prefsrc = NULL; char scope[ROUTE_SCOPE_STR_MAX], table[ROUTE_TABLE_STR_MAX], protocol[ROUTE_PROTOCOL_STR_MAX]; if (!in_addr_is_null(route->family, &route->dst)) { (void) in_addr_to_string(route->family, &route->dst, &dst); (void) asprintf(&dst_prefixlen, "/%u", route->dst_prefixlen); } if (!in_addr_is_null(route->family, &route->src)) (void) in_addr_to_string(route->family, &route->src, &src); if (!in_addr_is_null(route->family, &route->gw)) (void) in_addr_to_string(route->family, &route->gw, &gw); if (!in_addr_is_null(route->family, &route->prefsrc)) (void) in_addr_to_string(route->family, &route->prefsrc, &prefsrc); log_link_debug(link, "Configuring route: dst: %s%s, src: %s, gw: %s, prefsrc: %s, scope: %s, table: %s, proto: %s, type: %s", strna(dst), strempty(dst_prefixlen), strna(src), strna(gw), strna(prefsrc), format_route_scope(route->scope, scope, sizeof(scope)), format_route_table(route->table, table, sizeof(table)), format_route_protocol(route->protocol, protocol, sizeof(protocol)), strna(route_type_to_string(route->type))); } r = sd_rtnl_message_new_route(link->manager->rtnl, &req, RTM_NEWROUTE, route->family, route->protocol); if (r < 0) return log_link_error_errno(link, r, "Could not create RTM_NEWROUTE message: %m"); if (in_addr_is_null(route->family, &route->gw) == 0) { r = netlink_message_append_in_addr_union(req, RTA_GATEWAY, route->family, &route->gw); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_GATEWAY attribute: %m"); r = sd_rtnl_message_route_set_family(req, route->family); if (r < 0) return log_link_error_errno(link, r, "Could not set route family: %m"); } if (route->dst_prefixlen > 0) { r = netlink_message_append_in_addr_union(req, RTA_DST, route->family, &route->dst); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_DST attribute: %m"); r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen); if (r < 0) return log_link_error_errno(link, r, "Could not set destination prefix length: %m"); } if (route->src_prefixlen > 0) { r = netlink_message_append_in_addr_union(req, RTA_SRC, route->family, &route->src); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_SRC attribute: %m"); r = sd_rtnl_message_route_set_src_prefixlen(req, route->src_prefixlen); if (r < 0) return log_link_error_errno(link, r, "Could not set source prefix length: %m"); } if (in_addr_is_null(route->family, &route->prefsrc) == 0) { r = netlink_message_append_in_addr_union(req, RTA_PREFSRC, route->family, &route->prefsrc); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_PREFSRC attribute: %m"); } r = sd_rtnl_message_route_set_scope(req, route->scope); if (r < 0) return log_link_error_errno(link, r, "Could not set scope: %m"); if (route->gateway_onlink >= 0) SET_FLAG(route->flags, RTNH_F_ONLINK, route->gateway_onlink); r = sd_rtnl_message_route_set_flags(req, route->flags); if (r < 0) return log_link_error_errno(link, r, "Could not set flags: %m"); if (route->table != RT_TABLE_MAIN) { if (route->table < 256) { r = sd_rtnl_message_route_set_table(req, route->table); if (r < 0) return log_link_error_errno(link, r, "Could not set route table: %m"); } else { r = sd_rtnl_message_route_set_table(req, RT_TABLE_UNSPEC); if (r < 0) return log_link_error_errno(link, r, "Could not set route table: %m"); /* Table attribute to allow more than 256. */ r = sd_netlink_message_append_data(req, RTA_TABLE, &route->table, sizeof(route->table)); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_TABLE attribute: %m"); } } r = sd_netlink_message_append_u32(req, RTA_PRIORITY, route->priority); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_PRIORITY attribute: %m"); r = sd_netlink_message_append_u8(req, RTA_PREF, route->pref); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_PREF attribute: %m"); if (route->lifetime != USEC_INFINITY && kernel_route_expiration_supported()) { r = sd_netlink_message_append_u32(req, RTA_EXPIRES, DIV_ROUND_UP(usec_sub_unsigned(route->lifetime, now(clock_boottime_or_monotonic())), USEC_PER_SEC)); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_EXPIRES attribute: %m"); } r = sd_rtnl_message_route_set_type(req, route->type); if (r < 0) return log_link_error_errno(link, r, "Could not set route type: %m"); if (!IN_SET(route->type, RTN_UNREACHABLE, RTN_PROHIBIT, RTN_BLACKHOLE, RTN_THROW)) { r = sd_netlink_message_append_u32(req, RTA_OIF, link->ifindex); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_OIF attribute: %m"); } if (route->ttl_propagate >= 0) { r = sd_netlink_message_append_u8(req, RTA_TTL_PROPAGATE, route->ttl_propagate); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_TTL_PROPAGATE attribute: %m"); } r = sd_netlink_message_open_container(req, RTA_METRICS); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_METRICS attribute: %m"); if (route->mtu > 0) { r = sd_netlink_message_append_u32(req, RTAX_MTU, route->mtu); if (r < 0) return log_link_error_errno(link, r, "Could not append RTAX_MTU attribute: %m"); } if (route->initcwnd > 0) { r = sd_netlink_message_append_u32(req, RTAX_INITCWND, route->initcwnd); if (r < 0) return log_link_error_errno(link, r, "Could not append RTAX_INITCWND attribute: %m"); } if (route->initrwnd > 0) { r = sd_netlink_message_append_u32(req, RTAX_INITRWND, route->initrwnd); if (r < 0) return log_link_error_errno(link, r, "Could not append RTAX_INITRWND attribute: %m"); } if (route->quickack >= 0) { r = sd_netlink_message_append_u32(req, RTAX_QUICKACK, route->quickack); if (r < 0) return log_link_error_errno(link, r, "Could not append RTAX_QUICKACK attribute: %m"); } if (route->fast_open_no_cookie >= 0) { r = sd_netlink_message_append_u32(req, RTAX_FASTOPEN_NO_COOKIE, route->fast_open_no_cookie); if (r < 0) return log_link_error_errno(link, r, "Could not append RTAX_FASTOPEN_NO_COOKIE attribute: %m"); } r = sd_netlink_message_close_container(req); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_METRICS attribute: %m"); r = append_nexthops(route, req); if (r < 0) return log_link_error_errno(link, r, "Could not append RTA_MULTIPATH attribute: %m"); r = netlink_call_async(link->manager->rtnl, NULL, req, callback, link_netlink_destroy_callback, link); if (r < 0) return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); link_ref(link); r = route_add(link, route, &route); if (r < 0) return log_link_error_errno(link, r, "Could not add route: %m"); /* TODO: drop expiration handling once it can be pushed into the kernel */ if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) { r = sd_event_add_time(link->manager->event, &expire, clock_boottime_or_monotonic(), route->lifetime, 0, route_expire_handler, route); if (r < 0) return log_link_error_errno(link, r, "Could not arm expiration timer: %m"); } sd_event_source_unref(route->expire); route->expire = TAKE_PTR(expire); return 1; } int network_add_ipv4ll_route(Network *network) { _cleanup_(route_free_or_set_invalidp) Route *n = NULL; int r; assert(network); if (!network->ipv4ll_route) return 0; /* IPv4LLRoute= is in [Network] section. */ r = route_new_static(network, NULL, 0, &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; int r; assert(network); if (!network->default_route_on_device) return 0; /* DefaultRouteOnDevice= is in [Network] section. */ r = route_new_static(network, NULL, 0, &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; } static const char * const route_type_table[__RTN_MAX] = { [RTN_UNICAST] = "unicast", [RTN_LOCAL] = "local", [RTN_BROADCAST] = "broadcast", [RTN_ANYCAST] = "anycast", [RTN_MULTICAST] = "multicast", [RTN_BLACKHOLE] = "blackhole", [RTN_UNREACHABLE] = "unreachable", [RTN_PROHIBIT] = "prohibit", [RTN_THROW] = "throw", [RTN_NAT] = "nat", [RTN_XRESOLVE] = "xresolve", }; assert_cc(__RTN_MAX <= UCHAR_MAX); DEFINE_STRING_TABLE_LOOKUP(route_type, int); static const char * const route_scope_table[] = { [RT_SCOPE_UNIVERSE] = "global", [RT_SCOPE_SITE] = "site", [RT_SCOPE_LINK] = "link", [RT_SCOPE_HOST] = "host", [RT_SCOPE_NOWHERE] = "nowhere", }; DEFINE_PRIVATE_STRING_TABLE_LOOKUP(route_scope, int); const char *format_route_scope(int scope, char *buf, size_t size) { const char *s; char *p = buf; s = route_scope_to_string(scope); if (s) strpcpy(&p, size, s); else strpcpyf(&p, size, "%d", scope); return buf; } static const char * const route_table_table[] = { [RT_TABLE_DEFAULT] = "default", [RT_TABLE_MAIN] = "main", [RT_TABLE_LOCAL] = "local", }; DEFINE_PRIVATE_STRING_TABLE_LOOKUP(route_table, int); const char *format_route_table(int table, char *buf, size_t size) { const char *s; char *p = buf; s = route_table_to_string(table); if (s) strpcpy(&p, size, s); else strpcpyf(&p, size, "%d", table); return buf; } static const char * const route_protocol_table[] = { [RTPROT_KERNEL] = "kernel", [RTPROT_BOOT] = "boot", [RTPROT_STATIC] = "static", }; DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(route_protocol, int); static const char * const route_protocol_full_table[] = { [RTPROT_REDIRECT] = "redirect", [RTPROT_KERNEL] = "kernel", [RTPROT_BOOT] = "boot", [RTPROT_STATIC] = "static", [RTPROT_GATED] = "gated", [RTPROT_RA] = "ra", [RTPROT_MRT] = "mrt", [RTPROT_ZEBRA] = "zebra", [RTPROT_BIRD] = "bird", [RTPROT_DNROUTED] = "dnrouted", [RTPROT_XORP] = "xorp", [RTPROT_NTK] = "ntk", [RTPROT_DHCP] = "dhcp", [RTPROT_MROUTED] = "mrouted", [RTPROT_BABEL] = "babel", [RTPROT_BGP] = "bgp", [RTPROT_ISIS] = "isis", [RTPROT_OSPF] = "ospf", [RTPROT_RIP] = "rip", [RTPROT_EIGRP] = "eigrp", }; DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(route_protocol_full, int); const char *format_route_protocol(int protocol, char *buf, size_t size) { const char *s; char *p = buf; s = route_protocol_full_to_string(protocol); if (s) strpcpy(&p, size, s); else strpcpyf(&p, size, "%d", protocol); return buf; } 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 treat * this as the special '0' section */ r = route_new_static(network, NULL, 0, &n); if (r < 0) return r; } else { r = route_new_static(network, filename, section_line, &n); if (r < 0) return r; if (streq(rvalue, "_dhcp")) { n->gateway_from_dhcp = true; TAKE_PTR(n); return 0; } } if (n->family == AF_UNSPEC) r = in_addr_from_string_auto(rvalue, &n->family, &n->gw); else r = in_addr_from_string(n->family, rvalue, &n->gw); if (r < 0) { log_syntax(unit, LOG_ERR, filename, line, r, "Invalid %s='%s', ignoring assignment: %m", lvalue, rvalue); return 0; } 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 < 0) return r; 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_ERR, 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 < 0) return r; 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(lvalue); 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_ERR, filename, line, EINVAL, "Invalid %s='%s', ignoring assignment: %m", lvalue, rvalue); return 0; } 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 < 0) return r; r = safe_atou32(rvalue, &n->priority); if (r < 0) { log_syntax(unit, LOG_ERR, filename, line, r, "Could not parse route priority \"%s\", ignoring assignment: %m", rvalue); return 0; } 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 < 0) return r; r = route_scope_from_string(rvalue); if (r < 0) { log_syntax(unit, LOG_ERR, filename, line, 0, "Unknown route scope: %s", rvalue); return 0; } n->scope = r; n->scope_set = true; 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 < 0) return r; r = route_table_from_string(rvalue); if (r >= 0) n->table = r; else { r = safe_atou32(rvalue, &n->table); if (r < 0) { log_syntax(unit, LOG_ERR, filename, line, r, "Could not parse route table number \"%s\", ignoring assignment: %m", rvalue); return 0; } } n->table_set = true; TAKE_PTR(n); return 0; } int config_parse_gateway_onlink( 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 < 0) return r; r = parse_boolean(rvalue); if (r < 0) { log_syntax(unit, LOG_ERR, filename, line, r, "Could not parse %s=\"%s\", ignoring assignment: %m", lvalue, rvalue); return 0; } n->gateway_onlink = r; 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 < 0) return r; 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_ERR, filename, line, 0, "Unknown route preference: %s", rvalue); return 0; } 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 < 0) return r; r = route_protocol_from_string(rvalue); if (r >= 0) n->protocol = r; else { r = safe_atou8(rvalue , &n->protocol); if (r < 0) { log_syntax(unit, LOG_ERR, filename, line, r, "Could not parse route protocol \"%s\", ignoring assignment: %m", rvalue); return 0; } } 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 < 0) return r; t = route_type_from_string(rvalue); if (t < 0) { log_syntax(unit, LOG_ERR, filename, line, 0, "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_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; uint64_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 < 0) return r; r = parse_size(rvalue, 1024, &k); if (r < 0) { log_syntax(unit, LOG_ERR, filename, line, r, "Could not parse TCP %s \"%s\", ignoring assignment: %m", lvalue, rvalue); return 0; } if (k > UINT32_MAX) { log_syntax(unit, LOG_ERR, filename, line, 0, "Specified TCP %s \"%s\" is too large, 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("Invalid TCP window type."); TAKE_PTR(n); return 0; } int config_parse_quickack( 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 k, r; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); r = route_new_static(network, filename, section_line, &n); if (r < 0) return r; k = parse_boolean(rvalue); if (k < 0) { log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse TCP quickack, ignoring: %s", rvalue); return 0; } n->quickack = !!k; TAKE_PTR(n); return 0; } int config_parse_fast_open_no_cookie( 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 k, r; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); r = route_new_static(network, filename, section_line, &n); if (r < 0) return r; k = parse_boolean(rvalue); if (k < 0) { log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse TCP fastopen no cookie, ignoring: %s", rvalue); return 0; } n->fast_open_no_cookie = k; 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 < 0) return r; 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_route_ttl_propagate( 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, k; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); r = route_new_static(network, filename, section_line, &n); if (r < 0) return r; k = parse_boolean(rvalue); if (k < 0) { log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse TTLPropagate= value, ignoring: %s", rvalue); return 0; } n->ttl_propagate = k; 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_(route_free_or_set_invalidp) Route *n = NULL; _cleanup_free_ char *word = NULL, *buf = NULL; _cleanup_free_ MultipathRoute *m = NULL; Network *network = userdata; const char *p, *ip, *dev; union in_addr_union a; int family, r; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); r = route_new_static(network, filename, section_line, &n); if (r < 0) return r; if (isempty(rvalue)) { n->multipath_routes = ordered_set_free_free(n->multipath_routes); 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_ERR, filename, line, r, "Invalid multipath route option, ignoring assignment: %s", rvalue); return 0; } dev = strchr(word, '@'); if (dev) { buf = strndup(word, dev - word); if (!buf) return log_oom(); ip = buf; dev++; } else ip = word; r = in_addr_from_string_auto(ip, &family, &a); if (r < 0) { log_syntax(unit, LOG_ERR, filename, line, r, "Invalid multipath route gateway '%s', ignoring assignment: %m", rvalue); return 0; } m->gateway.address = a; m->gateway.family = family; if (dev) { r = resolve_interface(NULL, dev); if (r < 0) { log_syntax(unit, LOG_ERR, filename, line, r, "Invalid interface name or index, ignoring assignment: %s", dev); return 0; } m->ifindex = r; } if (!isempty(p)) { r = safe_atou32(p, &m->weight); if (r < 0) { log_syntax(unit, LOG_ERR, filename, line, r, "Invalid multipath route weight, ignoring assignment: %s", p); return 0; } if (m->weight == 0 || m->weight > 256) { log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid multipath route weight, ignoring assignment: %s", p); return 0; } } r = ordered_set_ensure_allocated(&n->multipath_routes, NULL); if (r < 0) return log_oom(); r = ordered_set_put(n->multipath_routes, m); if (r < 0) { log_syntax(unit, LOG_ERR, filename, line, r, "Failed to store multipath route, ignoring assignment: %m"); return 0; } TAKE_PTR(m); TAKE_PTR(n); return 0; } int route_section_verify(Route *route, Network *network) { if (section_is_invalid(route->section)) return -EINVAL; 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->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; } if (network->n_static_addresses == 0 && in_addr_is_null(route->family, &route->gw) == 0 && route->gateway_onlink < 0) { log_warning("%s: Gateway= without static address configured. " "Enabling GatewayOnLink= option.", network->filename); route->gateway_onlink = true; } return 0; }