/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2013 Tom Gundersen <teg@jklm.no> systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <net/if.h> #include "networkd.h" #include "utf8.h" #include "util.h" #include "conf-parser.h" #include "net-util.h" int route_new_static(Network *network, unsigned section, Route **ret) { _cleanup_route_free_ Route *route = NULL; if (section) { uint64_t key = section; route = hashmap_get(network->routes_by_section, &key); if (route) { *ret = route; route = NULL; return 0; } } route = new0(Route, 1); if (!route) return -ENOMEM; route->network = network; LIST_PREPEND(static_routes, network->static_routes, route); if (section) { route->section = section; hashmap_put(network->routes_by_section, &route->section, route); } *ret = route; route = NULL; return 0; } int route_new_dynamic(Route **ret) { _cleanup_route_free_ Route *route = NULL; route = new0(Route, 1); if (!route) return -ENOMEM; *ret = route; route = NULL; return 0; } void route_free(Route *route) { if (!route) return; if (route->network) { LIST_REMOVE(static_routes, route->network->static_routes, route); if (route->section) hashmap_remove(route->network->routes_by_section, &route->section); } free(route); } int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback) { _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; int r; assert(link); assert(link->manager); assert(link->manager->rtnl); assert(link->ifindex > 0); assert(route->family == AF_INET || route->family == AF_INET6); r = sd_rtnl_message_route_new(RTM_NEWROUTE, route->family, &req); if (r < 0) { log_error("Could not create RTM_NEWROUTE message: %s", strerror(-r)); return r; } if (route->family == AF_INET) r = sd_rtnl_message_append_in_addr(req, RTA_GATEWAY, &route->in_addr.in); else if (route->family == AF_INET6) r = sd_rtnl_message_append_in6_addr(req, RTA_GATEWAY, &route->in_addr.in6); if (r < 0) { log_error("Could not append RTA_GATEWAY attribute: %s", strerror(-r)); return r; } if (route->dst_prefixlen) { if (route->family == AF_INET) r = sd_rtnl_message_append_in_addr(req, RTA_DST, &route->dst_addr.in); else if (route->family == AF_INET6) r = sd_rtnl_message_append_in6_addr(req, RTA_DST, &route->dst_addr.in6); if (r < 0) { log_error("Could not append RTA_DST attribute: %s", strerror(-r)); return r; } r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen); if (r < 0) { log_error("Could not set destination prefix length: %s", strerror(-r)); return r; } } r = sd_rtnl_message_append_u32(req, RTA_OIF, link->ifindex); if (r < 0) { log_error("Could not append RTA_OIF attribute: %s", strerror(-r)); return r; } r = sd_rtnl_call_async(link->manager->rtnl, req, callback, link, 0, NULL); if (r < 0) { log_error("Could not send rtnetlink message: %s", strerror(-r)); return r; } 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_ Route *n = NULL; _cleanup_free_ char *route = 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 */ section_line = 0; } r = route_new_static(network, section_line, &n); if (r < 0) return r; r = net_parse_inaddr(rvalue, &n->family, &n->in_addr); if (r < 0) { log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Route is invalid, ignoring assignment: %s", route); return 0; } n = NULL; 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_ Route *n = NULL; _cleanup_free_ char *address = NULL; const char *e; int r; assert(filename); assert(section); assert(lvalue); assert(rvalue); assert(data); r = route_new_static(network, section_line, &n); if (r < 0) return r; /* Destination=address/prefixlen */ /* address */ e = strchr(rvalue, '/'); if (e) { address = strndup(rvalue, e - rvalue); if (!address) return log_oom(); } else { address = strdup(rvalue); if (!address) return log_oom(); } r = net_parse_inaddr(address, &n->dst_family, &n->dst_addr); if (r < 0) { log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Destination is invalid, ignoring assignment: %s", address); return 0; } /* prefixlen */ if (e) { unsigned i; r = safe_atou(e + 1, &i); if (r < 0) { log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Route destination prefix length is invalid, " "ignoring assignment: %s", e + 1); return 0; } n->dst_prefixlen = (unsigned char) i; } else { switch (n->dst_family) { case AF_INET: n->dst_prefixlen = 32; break; case AF_INET6: n->dst_prefixlen = 128; break; } } n = NULL; return 0; }