2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
19 #include <arpa/inet.h>
23 #include "interface.h"
24 #include "interface-ip.h"
39 static const struct blobmsg_policy route_attr[__ROUTE_MAX] = {
40 [ROUTE_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
41 [ROUTE_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
42 [ROUTE_MASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING },
43 [ROUTE_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
44 [ROUTE_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
45 [ROUTE_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
48 const struct config_param_list route_attr_list = {
49 .n_params = __ROUTE_MAX,
54 match_if_addr(union if_addr *a1, union if_addr *a2, int mask)
57 int m_bytes = (mask + 7) / 8;
58 uint8_t m_clear = (1 << (m_bytes * 8 - mask)) - 1;
63 memcpy(p1, a1, m_bytes);
64 memcpy(p2, a2, m_bytes);
66 p1[m_bytes - 1] &= ~m_clear;
67 p2[m_bytes - 1] &= ~m_clear;
69 return !memcmp(p1, p2, m_bytes);
73 __find_ip_addr_target(struct interface_ip_settings *ip, union if_addr *a, bool v6)
75 struct device_addr *addr;
77 vlist_for_each_element(&ip->addr, addr, node) {
81 if (v6 != ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
84 if (!match_if_addr(&addr->addr, a, addr->mask))
94 __find_ip_route_target(struct interface_ip_settings *ip, union if_addr *a,
95 bool v6, struct device_route **res)
97 struct device_route *route;
99 vlist_for_each_element(&ip->route, route, node) {
103 if (v6 != ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
106 if (!match_if_addr(&route->addr, a, route->mask))
109 if (!*res || route->mask < (*res)->mask)
115 interface_ip_find_addr_target(struct interface *iface, union if_addr *a, bool v6)
117 return __find_ip_addr_target(&iface->proto_ip, a, v6) ||
118 __find_ip_addr_target(&iface->config_ip, a, v6);
122 interface_ip_find_route_target(struct interface *iface, union if_addr *a,
123 bool v6, struct device_route **route)
125 __find_ip_route_target(&iface->proto_ip, a, v6, route);
126 __find_ip_route_target(&iface->config_ip, a, v6, route);
130 interface_ip_add_target_route(union if_addr *addr, bool v6)
132 struct interface *iface;
133 struct device_route *route, *r_next = NULL;
135 route = calloc(1, sizeof(*route));
139 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
140 route->mask = v6 ? 128 : 32;
141 memcpy(&route->addr, addr, v6 ? sizeof(addr->in6) : sizeof(addr->in));
143 vlist_for_each_element(&interfaces, iface, node) {
144 /* look for locally addressable target first */
145 if (interface_ip_find_addr_target(iface, addr, v6))
148 /* do not stop at the first route, let the lookup compare
149 * masks to find the best match */
150 interface_ip_find_route_target(iface, addr, v6, &r_next);
156 iface = r_next->iface;
157 memcpy(&route->nexthop, &r_next->nexthop, sizeof(route->nexthop));
158 route->mtu = r_next->mtu;
159 route->metric = r_next->metric;
162 route->iface = iface;
163 vlist_add(&iface->host_routes, &route->node, &route->flags);
168 interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6)
170 struct interface_ip_settings *ip;
171 struct blob_attr *tb[__ROUTE_MAX], *cur;
172 struct device_route *route;
173 int af = v6 ? AF_INET6 : AF_INET;
175 blobmsg_parse(route_attr, __ROUTE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
178 if ((cur = tb[ROUTE_INTERFACE]) == NULL)
181 iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
185 ip = &iface->config_ip;
187 ip = &iface->proto_ip;
190 route = calloc(1, sizeof(*route));
194 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
195 route->mask = v6 ? 128 : 32;
196 if ((cur = tb[ROUTE_MASK]) != NULL) {
197 route->mask = parse_netmask_string(blobmsg_data(cur), v6);
198 if (route->mask > (v6 ? 128 : 32))
202 if ((cur = tb[ROUTE_TARGET]) != NULL) {
203 if (!inet_pton(af, blobmsg_data(cur), &route->addr)) {
204 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
209 if ((cur = tb[ROUTE_GATEWAY]) != NULL) {
210 if (!inet_pton(af, blobmsg_data(cur), &route->nexthop)) {
211 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur));
216 if ((cur = tb[ROUTE_METRIC]) != NULL) {
217 route->metric = blobmsg_get_u32(cur);
218 route->flags |= DEVROUTE_METRIC;
221 if ((cur = tb[ROUTE_MTU]) != NULL)
222 route->mtu = blobmsg_get_u32(cur);
224 vlist_add(&ip->route, &route->node, &route->flags);
232 addr_cmp(const void *k1, const void *k2, void *ptr)
234 return memcmp(k1, k2, sizeof(struct device_addr) -
235 offsetof(struct device_addr, flags));
239 route_cmp(const void *k1, const void *k2, void *ptr)
241 return memcmp(k1, k2, sizeof(struct device_route) -
242 offsetof(struct device_route, flags));
246 interface_update_proto_addr(struct vlist_tree *tree,
247 struct vlist_node *node_new,
248 struct vlist_node *node_old)
250 struct interface_ip_settings *ip;
251 struct interface *iface;
253 struct device_addr *a_new = NULL, *a_old = NULL;
256 ip = container_of(tree, struct interface_ip_settings, addr);
258 dev = iface->l3_dev.dev;
261 a_new = container_of(node_new, struct device_addr, node);
263 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
267 uint32_t *a = (uint32_t *) &a_new->addr;
269 mask >>= a_new->mask;
270 a_new->broadcast = *a | mask;
275 a_old = container_of(node_old, struct device_addr, node);
277 if (a_new && a_old) {
280 if (a_old->flags != a_new->flags)
283 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
284 a_new->broadcast != a_old->broadcast)
289 if (!(a_old->flags & DEVADDR_EXTERNAL) && a_old->enabled && !keep)
290 system_del_address(dev, a_old);
295 if (!(a_new->flags & DEVADDR_EXTERNAL) && !keep)
296 system_add_address(dev, a_new);
297 a_new->enabled = true;
302 enable_route(struct interface_ip_settings *ip, struct device_route *route)
304 if (ip->no_defaultroute && !route->mask)
311 interface_update_proto_route(struct vlist_tree *tree,
312 struct vlist_node *node_new,
313 struct vlist_node *node_old)
315 struct interface_ip_settings *ip;
316 struct interface *iface;
318 struct device_route *route_old, *route_new;
321 ip = container_of(tree, struct interface_ip_settings, route);
323 dev = iface->l3_dev.dev;
325 route_old = container_of(node_old, struct device_route, node);
326 route_new = container_of(node_new, struct device_route, node);
328 if (node_old && node_new)
329 keep = !memcmp(&route_old->nexthop, &route_new->nexthop, sizeof(route_old->nexthop));
332 if (!(route_old->flags & DEVADDR_EXTERNAL) && route_old->enabled && !keep)
333 system_del_route(dev, route_old);
338 bool _enabled = enable_route(ip, route_new);
340 if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled)
341 system_add_route(dev, route_new);
343 route_new->iface = iface;
344 route_new->enabled = _enabled;
349 interface_update_host_route(struct vlist_tree *tree,
350 struct vlist_node *node_new,
351 struct vlist_node *node_old)
353 struct interface *iface;
355 struct device_route *route_old, *route_new;
357 iface = container_of(tree, struct interface, host_routes);
358 dev = iface->l3_dev.dev;
360 route_old = container_of(node_old, struct device_route, node);
361 route_new = container_of(node_new, struct device_route, node);
364 system_del_route(dev, route_old);
369 system_add_route(dev, route_new);
373 interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
375 struct dns_server *s;
377 s = calloc(1, sizeof(*s));
379 if (inet_pton(s->af, str, &s->addr.in))
383 if (inet_pton(s->af, str, &s->addr.in))
390 D(INTERFACE, "Add IPv%c DNS server: %s\n",
391 s->af == AF_INET6 ? '6' : '4', str);
392 vlist_simple_add(&ip->dns_servers, &s->node);
396 interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
398 struct blob_attr *cur;
401 blobmsg_for_each_attr(cur, list, rem) {
402 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
405 if (!blobmsg_check_attr(cur, NULL))
408 interface_add_dns_server(ip, blobmsg_data(cur));
413 interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
415 struct dns_search_domain *s;
416 int len = strlen(str);
418 s = calloc(1, sizeof(*s) + len + 1);
422 D(INTERFACE, "Add DNS search domain: %s\n", str);
423 memcpy(s->name, str, len);
424 vlist_simple_add(&ip->dns_search, &s->node);
428 interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
430 struct blob_attr *cur;
433 blobmsg_for_each_attr(cur, list, rem) {
434 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
437 if (!blobmsg_check_attr(cur, NULL))
440 interface_add_dns_search_domain(ip, blobmsg_data(cur));
445 write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip)
447 struct dns_server *s;
448 struct dns_search_domain *d;
452 vlist_simple_for_each_element(&ip->dns_servers, s, node) {
453 str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
457 fprintf(f, "nameserver %s\n", str);
460 vlist_simple_for_each_element(&ip->dns_search, d, node) {
461 fprintf(f, "search %s\n", d->name);
466 interface_write_resolv_conf(void)
468 struct interface *iface;
469 char *path = alloca(strlen(resolv_conf) + 5);
472 sprintf(path, "%s.tmp", resolv_conf);
474 f = fopen(path, "w");
476 D(INTERFACE, "Failed to open %s for writing\n", path);
480 vlist_for_each_element(&interfaces, iface, node) {
481 if (iface->state != IFS_UP)
484 if (vlist_simple_empty(&iface->proto_ip.dns_search) &&
485 vlist_simple_empty(&iface->proto_ip.dns_servers) &&
486 vlist_simple_empty(&iface->config_ip.dns_search) &&
487 vlist_simple_empty(&iface->config_ip.dns_servers))
490 fprintf(f, "# Interface %s\n", iface->name);
491 write_resolv_conf_entries(f, &iface->config_ip);
492 if (!iface->proto_ip.no_dns)
493 write_resolv_conf_entries(f, &iface->proto_ip);
496 if (rename(path, resolv_conf) < 0) {
497 D(INTERFACE, "Failed to replace %s\n", resolv_conf);
502 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
504 struct device_addr *addr;
505 struct device_route *route;
508 ip->enabled = enabled;
509 dev = ip->iface->l3_dev.dev;
513 vlist_for_each_element(&ip->addr, addr, node) {
514 if (addr->enabled == enabled)
518 system_add_address(dev, addr);
520 system_del_address(dev, addr);
521 addr->enabled = enabled;
524 vlist_for_each_element(&ip->route, route, node) {
525 bool _enabled = enabled;
527 if (!enable_route(ip, route))
530 if (route->enabled == _enabled)
534 if (!(route->flags & DEVROUTE_METRIC))
535 route->metric = ip->iface->metric;
537 system_add_route(dev, route);
539 system_del_route(dev, route);
540 route->enabled = _enabled;
545 interface_ip_update_start(struct interface_ip_settings *ip)
547 if (ip != &ip->iface->config_ip) {
548 vlist_simple_update(&ip->dns_servers);
549 vlist_simple_update(&ip->dns_search);
551 vlist_update(&ip->route);
552 vlist_update(&ip->addr);
556 interface_ip_update_complete(struct interface_ip_settings *ip)
558 vlist_simple_flush(&ip->dns_servers);
559 vlist_simple_flush(&ip->dns_search);
560 vlist_flush(&ip->route);
561 vlist_flush(&ip->addr);
565 interface_ip_flush(struct interface_ip_settings *ip)
567 if (ip == &ip->iface->proto_ip)
568 vlist_flush_all(&ip->iface->host_routes);
569 vlist_simple_flush_all(&ip->dns_servers);
570 vlist_simple_flush_all(&ip->dns_search);
571 vlist_flush_all(&ip->route);
572 vlist_flush_all(&ip->addr);
576 __interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
580 vlist_simple_init(&ip->dns_search, struct dns_search_domain, node);
581 vlist_simple_init(&ip->dns_servers, struct dns_server, node);
582 vlist_init(&ip->route, route_cmp, interface_update_proto_route);
583 vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
587 interface_ip_init(struct interface *iface)
589 __interface_ip_init(&iface->proto_ip, iface);
590 __interface_ip_init(&iface->config_ip, iface);
591 vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);