2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2012 Steven Barth <steven@midlink.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
20 #include <arpa/inet.h>
24 #include "interface.h"
25 #include "interface-ip.h"
42 static const struct blobmsg_policy route_attr[__ROUTE_MAX] = {
43 [ROUTE_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
44 [ROUTE_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
45 [ROUTE_MASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING },
46 [ROUTE_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
47 [ROUTE_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
48 [ROUTE_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
49 [ROUTE_TABLE] = { .name = "table", .type = BLOBMSG_TYPE_STRING },
50 [ROUTE_VALID] = { .name = "valid", .type = BLOBMSG_TYPE_INT32 },
53 const struct config_param_list route_attr_list = {
54 .n_params = __ROUTE_MAX,
59 struct list_head prefixes = LIST_HEAD_INIT(prefixes);
60 static struct device_prefix *ula_prefix = NULL;
61 static struct uloop_timeout valid_until_timeout;
65 clear_if_addr(union if_addr *a, int mask)
67 int m_bytes = (mask + 7) / 8;
68 uint8_t m_clear = (1 << (m_bytes * 8 - mask)) - 1;
69 uint8_t *p = (uint8_t *) a;
71 if (m_bytes < sizeof(a))
72 memset(p + m_bytes, 0, sizeof(a) - m_bytes);
74 p[m_bytes - 1] &= ~m_clear;
78 match_if_addr(union if_addr *a1, union if_addr *a2, int mask)
80 union if_addr *p1, *p2;
82 p1 = alloca(sizeof(*a1));
83 p2 = alloca(sizeof(*a2));
85 memcpy(p1, a1, sizeof(*a1));
86 clear_if_addr(p1, mask);
87 memcpy(p2, a2, sizeof(*a2));
88 clear_if_addr(p2, mask);
90 return !memcmp(p1, p2, sizeof(*p1));
93 static int set_ipv6_source_policy(bool add, const union if_addr *addr, uint8_t mask, int ifindex)
95 struct iprule rule = {
96 .flags = IPRULE_INET6 | IPRULE_SRC | IPRULE_LOOKUP | IPRULE_PRIORITY,
98 .lookup = interface_ip_resolve_v6_rtable(ifindex),
103 return (add) ? system_add_iprule(&rule) : system_del_iprule(&rule);
107 __find_ip_addr_target(struct interface_ip_settings *ip, union if_addr *a, bool v6)
109 struct device_addr *addr;
111 vlist_for_each_element(&ip->addr, addr, node) {
115 if (v6 != ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
118 // Handle offlink addresses correctly
119 unsigned int mask = addr->mask;
120 if ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6 &&
121 (addr->flags & DEVADDR_OFFLINK))
124 if (!match_if_addr(&addr->addr, a, mask))
134 __find_ip_route_target(struct interface_ip_settings *ip, union if_addr *a,
135 bool v6, struct device_route **res)
137 struct device_route *route;
139 vlist_for_each_element(&ip->route, route, node) {
143 if (v6 != ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
146 if (!match_if_addr(&route->addr, a, route->mask))
149 if (route->flags & DEVROUTE_TABLE)
152 if (!*res || route->mask < (*res)->mask)
158 interface_ip_find_addr_target(struct interface *iface, union if_addr *a, bool v6)
160 return __find_ip_addr_target(&iface->proto_ip, a, v6) ||
161 __find_ip_addr_target(&iface->config_ip, a, v6);
165 interface_ip_find_route_target(struct interface *iface, union if_addr *a,
166 bool v6, struct device_route **route)
168 __find_ip_route_target(&iface->proto_ip, a, v6, route);
169 __find_ip_route_target(&iface->config_ip, a, v6, route);
173 interface_ip_add_target_route(union if_addr *addr, bool v6, struct interface *iface)
175 struct device_route *route, *r_next = NULL;
176 bool defaultroute_target = false;
177 int addrsize = v6 ? sizeof(addr->in6) : sizeof(addr->in);
179 route = calloc(1, sizeof(*route));
183 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
184 route->mask = v6 ? 128 : 32;
185 if (memcmp(&route->addr, addr, addrsize) == 0)
186 defaultroute_target = true;
188 memcpy(&route->addr, addr, addrsize);
191 /* look for locally addressable target first */
192 if (interface_ip_find_addr_target(iface, addr, v6))
195 /* do not stop at the first route, let the lookup compare
196 * masks to find the best match */
197 interface_ip_find_route_target(iface, addr, v6, &r_next);
199 vlist_for_each_element(&interfaces, iface, node) {
200 /* look for locally addressable target first */
201 if (interface_ip_find_addr_target(iface, addr, v6))
204 /* do not stop at the first route, let the lookup compare
205 * masks to find the best match */
206 interface_ip_find_route_target(iface, addr, v6, &r_next);
215 iface = r_next->iface;
216 memcpy(&route->nexthop, &r_next->nexthop, sizeof(route->nexthop));
217 route->mtu = r_next->mtu;
218 route->metric = r_next->metric;
219 route->table = r_next->table;
222 route->iface = iface;
223 if (defaultroute_target)
226 vlist_add(&iface->host_routes, &route->node, route);
231 interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6)
233 struct interface_ip_settings *ip;
234 struct blob_attr *tb[__ROUTE_MAX], *cur;
235 struct device_route *route;
236 int af = v6 ? AF_INET6 : AF_INET;
237 bool is_v6_proto_route = v6 && iface;
239 blobmsg_parse(route_attr, __ROUTE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
242 if ((cur = tb[ROUTE_INTERFACE]) == NULL)
245 iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
249 ip = &iface->config_ip;
251 ip = &iface->proto_ip;
254 route = calloc(1, sizeof(*route));
258 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
259 route->mask = v6 ? 128 : 32;
260 if ((cur = tb[ROUTE_MASK]) != NULL) {
261 route->mask = parse_netmask_string(blobmsg_data(cur), v6);
262 if (route->mask > (v6 ? 128 : 32))
266 if ((cur = tb[ROUTE_TARGET]) != NULL) {
267 if (!parse_ip_and_netmask(af, blobmsg_data(cur), &route->addr, &route->mask)) {
268 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
273 if ((cur = tb[ROUTE_GATEWAY]) != NULL) {
274 if (!inet_pton(af, blobmsg_data(cur), &route->nexthop)) {
275 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur));
280 if ((cur = tb[ROUTE_METRIC]) != NULL) {
281 route->metric = blobmsg_get_u32(cur);
282 route->flags |= DEVROUTE_METRIC;
285 if ((cur = tb[ROUTE_MTU]) != NULL) {
286 route->mtu = blobmsg_get_u32(cur);
287 route->flags |= DEVROUTE_MTU;
290 // Use source-based routing
291 if (is_v6_proto_route) {
292 route->table = interface_ip_resolve_v6_rtable(iface->l3_dev.dev->ifindex);
293 route->flags |= DEVROUTE_SRCTABLE;
296 if ((cur = tb[ROUTE_TABLE]) != NULL) {
297 if (!system_resolve_rt_table(blobmsg_data(cur), &route->table)) {
298 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
303 route->flags |= DEVROUTE_TABLE;
306 if ((cur = tb[ROUTE_VALID]) != NULL)
307 route->valid_until = system_get_rtime() + blobmsg_get_u32(cur);
309 vlist_add(&ip->route, &route->node, route);
317 addr_cmp(const void *k1, const void *k2, void *ptr)
319 return memcmp(k1, k2, sizeof(struct device_addr) -
320 offsetof(struct device_addr, flags));
324 route_cmp(const void *k1, const void *k2, void *ptr)
326 const struct device_route *r1 = k1, *r2 = k2;
328 if (r1->mask != r2->mask)
329 return r2->mask - r1->mask;
331 if (r1->metric != r2->metric)
332 return r1->metric - r2->metric;
334 if (r1->flags != r2->flags)
335 return r2->flags - r1->flags;
337 return memcmp(&r1->addr, &r2->addr, sizeof(r1->addr));
341 prefix_cmp(const void *k1, const void *k2, void *ptr)
343 return memcmp(k1, k2, sizeof(struct device_prefix) -
344 offsetof(struct device_prefix, addr));
348 interface_handle_subnet_route(struct interface *iface, struct device_addr *addr, bool add)
350 struct device *dev = iface->l3_dev.dev;
351 struct device_route route;
353 memset(&route, 0, sizeof(route));
355 route.flags = addr->flags;
356 route.mask = addr->mask;
357 memcpy(&route.addr, &addr->addr, sizeof(route.addr));
358 clear_if_addr(&route.addr, route.mask);
361 route.flags |= DEVADDR_KERNEL;
362 system_del_route(dev, &route);
364 if (!(addr->flags & DEVADDR_OFFLINK)) {
365 route.flags &= ~DEVADDR_KERNEL;
366 route.metric = iface->metric;
367 system_add_route(dev, &route);
370 if (!(addr->flags & DEVADDR_OFFLINK))
371 system_del_route(dev, &route);
376 interface_update_proto_addr(struct vlist_tree *tree,
377 struct vlist_node *node_new,
378 struct vlist_node *node_old)
380 struct interface_ip_settings *ip;
381 struct interface *iface;
383 struct device_addr *a_new = NULL, *a_old = NULL;
386 ip = container_of(tree, struct interface_ip_settings, addr);
388 dev = iface->l3_dev.dev;
391 a_new = container_of(node_new, struct device_addr, node);
393 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
397 uint32_t *a = (uint32_t *) &a_new->addr;
399 mask >>= a_new->mask;
400 a_new->broadcast = *a | htonl(mask);
405 a_old = container_of(node_old, struct device_addr, node);
407 if (a_new && a_old) {
410 if (a_old->flags != a_new->flags ||
411 a_old->valid_until != a_new->valid_until ||
412 a_old->preferred_until != a_new->preferred_until)
415 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
416 a_new->broadcast != a_old->broadcast)
421 if (!(a_old->flags & DEVADDR_EXTERNAL) && a_old->enabled && !keep) {
422 interface_handle_subnet_route(iface, a_old, false);
424 if ((a_old->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
425 set_ipv6_source_policy(false, &a_old->addr, a_old->mask, dev->ifindex);
427 system_del_address(dev, a_old);
433 a_new->enabled = true;
434 if (!(a_new->flags & DEVADDR_EXTERNAL) && !keep) {
435 system_add_address(dev, a_new);
437 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
438 set_ipv6_source_policy(true, &a_new->addr, a_new->mask, dev->ifindex);
440 if ((a_new->flags & DEVADDR_OFFLINK) || iface->metric)
441 interface_handle_subnet_route(iface, a_new, true);
447 enable_route(struct interface_ip_settings *ip, struct device_route *route)
449 if (ip->no_defaultroute && !route->mask)
456 interface_update_proto_route(struct vlist_tree *tree,
457 struct vlist_node *node_new,
458 struct vlist_node *node_old)
460 struct interface_ip_settings *ip;
461 struct interface *iface;
463 struct device_route *route_old, *route_new;
466 ip = container_of(tree, struct interface_ip_settings, route);
468 dev = iface->l3_dev.dev;
470 route_old = container_of(node_old, struct device_route, node);
471 route_new = container_of(node_new, struct device_route, node);
473 if (node_old && node_new)
474 keep = !memcmp(&route_old->nexthop, &route_new->nexthop, sizeof(route_old->nexthop));
477 if (!(route_old->flags & DEVADDR_EXTERNAL) && route_old->enabled && !keep)
478 system_del_route(dev, route_old);
483 bool _enabled = enable_route(ip, route_new);
485 if (!(route_new->flags & DEVROUTE_METRIC))
486 route_new->metric = iface->metric;
488 if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled)
489 system_add_route(dev, route_new);
491 route_new->iface = iface;
492 route_new->enabled = _enabled;
497 interface_update_host_route(struct vlist_tree *tree,
498 struct vlist_node *node_new,
499 struct vlist_node *node_old)
501 struct interface *iface;
503 struct device_route *route_old, *route_new;
505 iface = container_of(tree, struct interface, host_routes);
506 dev = iface->l3_dev.dev;
508 route_old = container_of(node_old, struct device_route, node);
509 route_new = container_of(node_new, struct device_route, node);
512 system_del_route(dev, route_old);
517 system_add_route(dev, route_new);
522 interface_set_prefix_address(struct device_prefix_assignment *assignment,
523 const struct device_prefix *prefix, struct interface *iface, bool add);
525 static void interface_trigger_ula_prefix(struct interface *iface,
526 const struct device_prefix *prefix, bool enable)
528 if (prefix == ula_prefix || (prefix->addr.s6_addr[0] & 0xfe) != 0xfc)
531 bool external_ula = false;
532 struct device_prefix_assignment *ula_assign = NULL;
533 struct device_prefix *c;
534 list_for_each_entry(c, &prefixes, head) {
535 if (c != ula_prefix && (c->addr.s6_addr[0] & 0xfe) != 0xfc)
538 struct device_prefix_assignment *a;
539 list_for_each_entry(a, &c->assignments, head) {
540 if (!strcmp(a->name, iface->name)) {
550 // Remove ULA assignment if there is an externally managed ULA and vice versa
551 if (ula_assign && ((enable && !external_ula) || (!enable && external_ula)))
552 interface_set_prefix_address(ula_assign, ula_prefix, iface, enable);
557 interface_set_prefix_address(struct device_prefix_assignment *assignment,
558 const struct device_prefix *prefix, struct interface *iface, bool add)
560 const struct interface *uplink = prefix->iface;
561 if (!iface->l3_dev.dev)
564 struct device *l3_downlink = iface->l3_dev.dev;
566 struct device_addr addr;
567 memset(&addr, 0, sizeof(addr));
568 addr.addr.in6 = prefix->addr;
569 addr.addr.in6.s6_addr32[1] |= htonl(assignment->assigned);
570 addr.addr.in6.s6_addr[15] += 1;
571 addr.mask = assignment->length;
572 addr.flags = DEVADDR_INET6;
573 addr.preferred_until = prefix->preferred_until;
574 addr.valid_until = prefix->valid_until;
576 if (!add && assignment->enabled) {
577 time_t now = system_get_rtime();
578 addr.preferred_until = now;
579 if (!addr.valid_until || addr.valid_until - now > 7200)
580 addr.valid_until = now + 7200;
581 system_add_address(l3_downlink, &addr);
582 assignment->enabled = false;
584 interface_trigger_ula_prefix(iface, prefix, true);
585 } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP)) {
586 system_add_address(l3_downlink, &addr);
587 if (uplink && uplink->l3_dev.dev) {
588 int mtu = system_update_ipv6_mtu(
589 uplink->l3_dev.dev, 0);
591 system_update_ipv6_mtu(l3_downlink, mtu);
593 assignment->enabled = true;
595 interface_trigger_ula_prefix(iface, prefix, false);
599 static bool interface_prefix_assign(struct list_head *list,
600 struct device_prefix_assignment *assign)
602 int32_t current = 0, asize = (1 << (64 - assign->length)) - 1;
603 struct device_prefix_assignment *c;
604 list_for_each_entry(c, list, head) {
605 if (assign->assigned != -1) {
606 if (assign->assigned > current && assign->assigned + asize < c->assigned) {
607 list_add_tail(&assign->head, &c->head);
610 } else if (assign->assigned == -1) {
611 current = (current + asize) & (~asize);
612 if (current + asize < c->assigned) {
613 assign->assigned = current;
614 list_add_tail(&assign->head, &c->head);
618 current = (c->assigned + (1 << (64 - c->length)));
623 static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
625 struct device_prefix_assignment *c;
626 struct interface *iface;
628 // Delete all assignments
629 while (!list_empty(&prefix->assignments)) {
630 c = list_first_entry(&prefix->assignments,
631 struct device_prefix_assignment, head);
632 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
633 interface_set_prefix_address(c, prefix, iface, false);
641 // End-of-assignment sentinel
642 c = malloc(sizeof(*c) + 1);
643 c->assigned = 1 << (64 - prefix->length);
646 list_add(&c->head, &prefix->assignments);
649 if (prefix->excl_length > 0) {
650 const char name[] = "!excluded";
651 c = malloc(sizeof(*c) + sizeof(name));
652 c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
653 ((1 << (64 - prefix->length)) - 1);
654 c->length = prefix->excl_length;
655 memcpy(c->name, name, sizeof(name));
656 list_add(&c->head, &prefix->assignments);
659 struct list_head assign_later = LIST_HEAD_INIT(assign_later);
660 vlist_for_each_element(&interfaces, iface, node) {
661 if (iface->config_ip.assignment_length < 48 ||
662 iface->config_ip.assignment_length > 64)
665 size_t namelen = strlen(iface->name) + 1;
666 c = malloc(sizeof(*c) + namelen);
667 c->length = iface->config_ip.assignment_length;
668 c->assigned = iface->config_ip.assignment_hint;
670 memcpy(c->name, iface->name, namelen);
672 // First process all custom assignments, put all others in later-list
673 if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
674 if (c->assigned != -1) {
676 netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
677 "of size %hhu for %s, trying other\n", c->length, c->name);
679 list_add_tail(&c->head, &assign_later);
683 // Then try to assign all other + failed custom assignments
684 while (!list_empty(&assign_later)) {
685 c = list_first_entry(&assign_later, struct device_prefix_assignment, head);
688 bool assigned = false;
690 assigned = interface_prefix_assign(&prefix->assignments, c);
691 } while (!assigned && ++c->length <= 64);
694 netifd_log_message(L_WARNING, "Failed to assign subprefix "
695 "of size %hhu for %s\n", c->length, c->name);
700 list_for_each_entry(c, &prefix->assignments, head)
701 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
702 interface_set_prefix_address(c, prefix, iface, true);
706 void interface_refresh_assignments(bool hint)
708 static bool refresh = false;
709 if (!hint && refresh) {
710 struct device_prefix *p;
711 list_for_each_entry(p, &prefixes, head)
712 interface_update_prefix_assignments(p, true);
719 interface_update_prefix(struct vlist_tree *tree,
720 struct vlist_node *node_new,
721 struct vlist_node *node_old)
723 struct device_prefix *prefix_old, *prefix_new;
724 prefix_old = container_of(node_old, struct device_prefix, node);
725 prefix_new = container_of(node_new, struct device_prefix, node);
727 struct device_route route;
728 memset(&route, 0, sizeof(route));
729 route.flags = DEVADDR_INET6;
730 route.metric = INT32_MAX;
731 route.mask = (node_new) ? prefix_new->length : prefix_old->length;
732 route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
735 struct device_prefix_assignment *c;
736 struct interface *iface;
738 if (node_old && node_new) {
739 // Move assignments and refresh addresses to update valid times
740 list_splice(&prefix_old->assignments, &prefix_new->assignments);
742 list_for_each_entry(c, &prefix_new->assignments, head)
743 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
744 interface_set_prefix_address(c, prefix_new, iface, true);
745 } else if (node_new) {
746 // Set null-route to avoid routing loops and set routing policy
747 system_add_route(NULL, &route);
748 if (prefix_new->iface)
749 set_ipv6_source_policy(true, &route.addr, route.mask,
750 prefix_new->iface->l3_dev.dev->ifindex);
753 interface_update_prefix_assignments(prefix_new, true);
754 } else if (node_old) {
755 interface_update_prefix_assignments(prefix_old, false);
758 if (prefix_old->iface)
759 set_ipv6_source_policy(false, &route.addr, route.mask,
760 prefix_old->iface->l3_dev.dev->ifindex);
761 system_del_route(NULL, &route);
765 list_del(&prefix_old->head);
770 list_add(&prefix_new->head, &prefixes);
774 struct device_prefix*
775 interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
776 uint8_t length, time_t valid_until, time_t preferred_until,
777 struct in6_addr *excl_addr, uint8_t excl_length)
779 struct device_prefix *prefix = calloc(1, sizeof(*prefix));
780 prefix->length = length;
781 prefix->addr = *addr;
782 prefix->preferred_until = preferred_until;
783 prefix->valid_until = valid_until;
784 prefix->iface = iface;
785 INIT_LIST_HEAD(&prefix->assignments);
788 prefix->excl_addr = *excl_addr;
789 prefix->excl_length = excl_length;
793 vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
795 interface_update_prefix(NULL, &prefix->node, NULL);
801 interface_ip_set_ula_prefix(const char *prefix)
803 char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
805 strncpy(buf, prefix, sizeof(buf) - 1);
806 char *prefixaddr = strtok_r(buf, "/", &saveptr);
808 struct in6_addr addr;
809 if (!prefixaddr || inet_pton(AF_INET6, prefixaddr, &addr) < 1) {
811 interface_update_prefix(NULL, NULL, &ula_prefix->node);
818 char *prefixlen = strtok_r(NULL, ",", &saveptr);
819 if (!prefixlen || (length = atoi(prefixlen)) < 1 || length > 64)
822 if (!ula_prefix || !IN6_ARE_ADDR_EQUAL(&addr, &ula_prefix->addr) ||
823 ula_prefix->length != length) {
825 interface_update_prefix(NULL, NULL, &ula_prefix->node);
827 ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
832 int interface_ip_resolve_v6_rtable(int ifindex)
834 return ifindex + 1000;
838 interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
840 struct dns_server *s;
842 s = calloc(1, sizeof(*s));
847 if (inet_pton(s->af, str, &s->addr.in))
851 if (inet_pton(s->af, str, &s->addr.in))
858 D(INTERFACE, "Add IPv%c DNS server: %s\n",
859 s->af == AF_INET6 ? '6' : '4', str);
860 vlist_simple_add(&ip->dns_servers, &s->node);
864 interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
866 struct blob_attr *cur;
869 blobmsg_for_each_attr(cur, list, rem) {
870 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
873 if (!blobmsg_check_attr(cur, NULL))
876 interface_add_dns_server(ip, blobmsg_data(cur));
881 interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
883 struct dns_search_domain *s;
884 int len = strlen(str);
886 s = calloc(1, sizeof(*s) + len + 1);
890 D(INTERFACE, "Add DNS search domain: %s\n", str);
891 memcpy(s->name, str, len);
892 vlist_simple_add(&ip->dns_search, &s->node);
896 interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
898 struct blob_attr *cur;
901 blobmsg_for_each_attr(cur, list, rem) {
902 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
905 if (!blobmsg_check_attr(cur, NULL))
908 interface_add_dns_search_domain(ip, blobmsg_data(cur));
913 write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip)
915 struct dns_server *s;
916 struct dns_search_domain *d;
918 char buf[INET6_ADDRSTRLEN];
920 vlist_simple_for_each_element(&ip->dns_servers, s, node) {
921 str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
925 fprintf(f, "nameserver %s\n", str);
928 vlist_simple_for_each_element(&ip->dns_search, d, node) {
929 fprintf(f, "search %s\n", d->name);
934 interface_write_resolv_conf(void)
936 struct interface *iface;
937 char *path = alloca(strlen(resolv_conf) + 5);
939 uint32_t crcold, crcnew;
941 sprintf(path, "%s.tmp", resolv_conf);
943 f = fopen(path, "w+");
945 D(INTERFACE, "Failed to open %s for writing\n", path);
949 vlist_for_each_element(&interfaces, iface, node) {
950 if (iface->state != IFS_UP)
953 if (vlist_simple_empty(&iface->proto_ip.dns_search) &&
954 vlist_simple_empty(&iface->proto_ip.dns_servers) &&
955 vlist_simple_empty(&iface->config_ip.dns_search) &&
956 vlist_simple_empty(&iface->config_ip.dns_servers))
959 fprintf(f, "# Interface %s\n", iface->name);
960 write_resolv_conf_entries(f, &iface->config_ip);
961 if (!iface->proto_ip.no_dns)
962 write_resolv_conf_entries(f, &iface->proto_ip);
966 crcnew = crc32_file(f);
970 f = fopen(resolv_conf, "r");
972 crcold = crc32_file(f);
976 if (crcold == crcnew) {
978 } else if (rename(path, resolv_conf) < 0) {
979 D(INTERFACE, "Failed to replace %s\n", resolv_conf);
984 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
986 struct device_addr *addr;
987 struct device_route *route;
990 ip->enabled = enabled;
991 dev = ip->iface->l3_dev.dev;
995 vlist_for_each_element(&ip->addr, addr, node) {
996 if (addr->enabled == enabled)
1000 system_add_address(dev, addr);
1002 system_del_address(dev, addr);
1003 addr->enabled = enabled;
1006 vlist_for_each_element(&ip->route, route, node) {
1007 bool _enabled = enabled;
1009 if (!enable_route(ip, route))
1012 if (route->enabled == _enabled)
1016 if (!(route->flags & DEVROUTE_METRIC))
1017 route->metric = ip->iface->metric;
1019 system_add_route(dev, route);
1021 system_del_route(dev, route);
1022 route->enabled = _enabled;
1025 struct device_prefix *c;
1026 struct device_prefix_assignment *a;
1027 list_for_each_entry(c, &prefixes, head)
1028 list_for_each_entry(a, &c->assignments, head)
1029 if (!strcmp(a->name, ip->iface->name))
1030 interface_set_prefix_address(a, c, ip->iface, enabled);
1034 interface_ip_update_start(struct interface_ip_settings *ip)
1036 if (ip != &ip->iface->config_ip) {
1037 vlist_simple_update(&ip->dns_servers);
1038 vlist_simple_update(&ip->dns_search);
1040 vlist_update(&ip->route);
1041 vlist_update(&ip->addr);
1042 vlist_update(&ip->prefix);
1046 interface_ip_update_complete(struct interface_ip_settings *ip)
1048 vlist_simple_flush(&ip->dns_servers);
1049 vlist_simple_flush(&ip->dns_search);
1050 vlist_flush(&ip->route);
1051 vlist_flush(&ip->addr);
1052 vlist_flush(&ip->prefix);
1053 interface_write_resolv_conf();
1057 interface_ip_flush(struct interface_ip_settings *ip)
1059 if (ip == &ip->iface->proto_ip)
1060 vlist_flush_all(&ip->iface->host_routes);
1061 vlist_simple_flush_all(&ip->dns_servers);
1062 vlist_simple_flush_all(&ip->dns_search);
1063 vlist_flush_all(&ip->route);
1064 vlist_flush_all(&ip->addr);
1065 vlist_flush_all(&ip->prefix);
1069 __interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
1073 vlist_simple_init(&ip->dns_search, struct dns_search_domain, node);
1074 vlist_simple_init(&ip->dns_servers, struct dns_server, node);
1075 vlist_init(&ip->route, route_cmp, interface_update_proto_route);
1076 vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
1077 vlist_init(&ip->prefix, prefix_cmp, interface_update_prefix);
1081 interface_ip_init(struct interface *iface)
1083 __interface_ip_init(&iface->proto_ip, iface);
1084 __interface_ip_init(&iface->config_ip, iface);
1085 vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);
1090 interface_ip_valid_until_handler(struct uloop_timeout *t)
1092 time_t now = system_get_rtime();
1093 struct interface *iface;
1094 vlist_for_each_element(&interfaces, iface, node) {
1095 if (iface->state != IFS_UP)
1098 struct device_addr *addr, *addrp;
1099 struct device_route *route, *routep;
1100 struct device_prefix *pref, *prefp;
1102 vlist_for_each_element_safe(&iface->proto_ip.addr, addr, node, addrp)
1103 if (addr->valid_until && addr->valid_until < now)
1104 vlist_delete(&iface->proto_ip.addr, &addr->node);
1106 vlist_for_each_element_safe(&iface->proto_ip.route, route, node, routep)
1107 if (route->valid_until && route->valid_until < now)
1108 vlist_delete(&iface->proto_ip.route, &route->node);
1110 vlist_for_each_element_safe(&iface->proto_ip.prefix, pref, node, prefp)
1111 if (pref->valid_until && pref->valid_until < now)
1112 vlist_delete(&iface->proto_ip.prefix, &pref->node);
1116 uloop_timeout_set(t, 1000);
1120 interface_ip_init_worker(void)
1122 valid_until_timeout.cb = interface_ip_valid_until_handler;
1123 uloop_timeout_set(&valid_until_timeout, 1000);