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_ip_source_policy(bool add, bool v6, unsigned int priority,
94 const union if_addr *addr, uint8_t mask, struct interface *iface)
98 struct iprule rule = {
99 .flags = IPRULE_SRC | IPRULE_LOOKUP | IPRULE_PRIORITY,
100 .priority = priority,
101 .lookup = (v6) ? iface->ip6table : iface->ip4table,
109 rule.flags |= (v6) ? IPRULE_INET6 : IPRULE_INET4;
111 return (add) ? system_add_iprule(&rule) : system_del_iprule(&rule);
114 static int set_ip_lo_policy(bool add, bool v6, struct interface *iface)
116 struct iprule rule = {
117 .flags = IPRULE_IN | IPRULE_LOOKUP | IPRULE_PRIORITY,
118 .priority = IPRULE_PRIORITY_NW + iface->l3_dev.dev->ifindex,
119 .lookup = (v6) ? iface->ip6table : iface->ip4table,
126 rule.flags |= (v6) ? IPRULE_INET6 : IPRULE_INET4;
128 return (add) ? system_add_iprule(&rule) : system_del_iprule(&rule);
132 __find_ip_addr_target(struct interface_ip_settings *ip, union if_addr *a, bool v6)
134 struct device_addr *addr;
136 vlist_for_each_element(&ip->addr, addr, node) {
140 if (v6 != ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
143 // Handle offlink addresses correctly
144 unsigned int mask = addr->mask;
145 if ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6 &&
146 (addr->flags & DEVADDR_OFFLINK))
149 if (!match_if_addr(&addr->addr, a, mask))
159 __find_ip_route_target(struct interface_ip_settings *ip, union if_addr *a,
160 bool v6, struct device_route **res)
162 struct device_route *route;
164 vlist_for_each_element(&ip->route, route, node) {
168 if (v6 != ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
171 if (!match_if_addr(&route->addr, a, route->mask))
174 if (route->flags & DEVROUTE_TABLE)
177 if (!*res || route->mask < (*res)->mask)
183 interface_ip_find_addr_target(struct interface *iface, union if_addr *a, bool v6)
185 return __find_ip_addr_target(&iface->proto_ip, a, v6) ||
186 __find_ip_addr_target(&iface->config_ip, a, v6);
190 interface_ip_find_route_target(struct interface *iface, union if_addr *a,
191 bool v6, struct device_route **route)
193 __find_ip_route_target(&iface->proto_ip, a, v6, route);
194 __find_ip_route_target(&iface->config_ip, a, v6, route);
198 interface_ip_add_target_route(union if_addr *addr, bool v6, struct interface *iface)
200 struct device_route *route, *r_next = NULL;
201 bool defaultroute_target = false;
202 int addrsize = v6 ? sizeof(addr->in6) : sizeof(addr->in);
204 route = calloc(1, sizeof(*route));
208 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
209 route->mask = v6 ? 128 : 32;
210 if (memcmp(&route->addr, addr, addrsize) == 0)
211 defaultroute_target = true;
213 memcpy(&route->addr, addr, addrsize);
216 /* look for locally addressable target first */
217 if (interface_ip_find_addr_target(iface, addr, v6))
220 /* do not stop at the first route, let the lookup compare
221 * masks to find the best match */
222 interface_ip_find_route_target(iface, addr, v6, &r_next);
224 vlist_for_each_element(&interfaces, iface, node) {
225 /* look for locally addressable target first */
226 if (interface_ip_find_addr_target(iface, addr, v6))
229 /* do not stop at the first route, let the lookup compare
230 * masks to find the best match */
231 interface_ip_find_route_target(iface, addr, v6, &r_next);
240 iface = r_next->iface;
241 memcpy(&route->nexthop, &r_next->nexthop, sizeof(route->nexthop));
242 route->mtu = r_next->mtu;
243 route->metric = r_next->metric;
244 route->table = r_next->table;
247 route->iface = iface;
248 if (defaultroute_target)
251 vlist_add(&iface->host_routes, &route->node, route);
256 interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6)
258 struct interface_ip_settings *ip;
259 struct blob_attr *tb[__ROUTE_MAX], *cur;
260 struct device_route *route;
261 int af = v6 ? AF_INET6 : AF_INET;
262 bool is_proto_route = !!iface;
264 blobmsg_parse(route_attr, __ROUTE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
267 if ((cur = tb[ROUTE_INTERFACE]) == NULL)
270 iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
274 ip = &iface->config_ip;
276 ip = &iface->proto_ip;
279 route = calloc(1, sizeof(*route));
283 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
284 route->mask = v6 ? 128 : 32;
285 if ((cur = tb[ROUTE_MASK]) != NULL) {
286 route->mask = parse_netmask_string(blobmsg_data(cur), v6);
287 if (route->mask > (v6 ? 128 : 32))
291 if ((cur = tb[ROUTE_TARGET]) != NULL) {
292 if (!parse_ip_and_netmask(af, blobmsg_data(cur), &route->addr, &route->mask)) {
293 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
298 if ((cur = tb[ROUTE_GATEWAY]) != NULL) {
299 if (!inet_pton(af, blobmsg_data(cur), &route->nexthop)) {
300 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur));
305 if ((cur = tb[ROUTE_METRIC]) != NULL) {
306 route->metric = blobmsg_get_u32(cur);
307 route->flags |= DEVROUTE_METRIC;
310 if ((cur = tb[ROUTE_MTU]) != NULL) {
311 route->mtu = blobmsg_get_u32(cur);
312 route->flags |= DEVROUTE_MTU;
315 // Use source-based routing
316 if (is_proto_route) {
317 route->table = (v6) ? iface->ip6table : iface->ip4table;
318 route->flags |= DEVROUTE_SRCTABLE;
321 if ((cur = tb[ROUTE_TABLE]) != NULL) {
322 if (!system_resolve_rt_table(blobmsg_data(cur), &route->table)) {
323 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
328 route->flags |= DEVROUTE_TABLE;
331 if ((cur = tb[ROUTE_VALID]) != NULL)
332 route->valid_until = system_get_rtime() + blobmsg_get_u32(cur);
334 vlist_add(&ip->route, &route->node, route);
342 addr_cmp(const void *k1, const void *k2, void *ptr)
344 return memcmp(k1, k2, sizeof(struct device_addr) -
345 offsetof(struct device_addr, flags));
349 route_cmp(const void *k1, const void *k2, void *ptr)
351 const struct device_route *r1 = k1, *r2 = k2;
353 if (r1->mask != r2->mask)
354 return r2->mask - r1->mask;
356 if (r1->metric != r2->metric)
357 return r1->metric - r2->metric;
359 if (r1->flags != r2->flags)
360 return r2->flags - r1->flags;
362 return memcmp(&r1->addr, &r2->addr, sizeof(r1->addr));
366 prefix_cmp(const void *k1, const void *k2, void *ptr)
368 return memcmp(k1, k2, sizeof(struct device_prefix) -
369 offsetof(struct device_prefix, addr));
373 interface_handle_subnet_route(struct interface *iface, struct device_addr *addr, bool add)
375 struct device *dev = iface->l3_dev.dev;
376 struct device_route route;
378 memset(&route, 0, sizeof(route));
380 route.flags = addr->flags;
381 route.mask = addr->mask;
382 memcpy(&route.addr, &addr->addr, sizeof(route.addr));
383 clear_if_addr(&route.addr, route.mask);
386 route.flags |= DEVADDR_KERNEL;
387 system_del_route(dev, &route);
389 if (!(addr->flags & DEVADDR_OFFLINK)) {
390 route.flags &= ~DEVADDR_KERNEL;
391 route.metric = iface->metric;
392 system_add_route(dev, &route);
395 if (!(addr->flags & DEVADDR_OFFLINK))
396 system_del_route(dev, &route);
401 interface_update_proto_addr(struct vlist_tree *tree,
402 struct vlist_node *node_new,
403 struct vlist_node *node_old)
405 struct interface_ip_settings *ip;
406 struct interface *iface;
408 struct device_addr *a_new = NULL, *a_old = NULL;
412 ip = container_of(tree, struct interface_ip_settings, addr);
414 dev = iface->l3_dev.dev;
417 a_new = container_of(node_new, struct device_addr, node);
419 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
423 uint32_t *a = (uint32_t *) &a_new->addr;
425 mask >>= a_new->mask;
426 a_new->broadcast = *a | htonl(mask);
431 a_old = container_of(node_old, struct device_addr, node);
433 if (a_new && a_old) {
436 if (a_old->flags != a_new->flags ||
437 a_old->valid_until != a_new->valid_until ||
438 a_old->preferred_until != a_new->preferred_until)
441 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
442 a_new->broadcast != a_old->broadcast)
447 if (!(a_old->flags & DEVADDR_EXTERNAL) && a_old->enabled && !keep) {
448 interface_handle_subnet_route(iface, a_old, false);
450 if ((a_old->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
453 //This is needed for source routing to work correctly. If a device
454 //has two connections to a network using the same subnet, adding
455 //only the network-rule will cause packets to be routed through the
456 //first matching network (source IP matches both masks).
457 set_ip_source_policy(false, v6, IPRULE_PRIORITY_ADDR, &a_old->addr,
458 (v6) ? 128 : 32, iface);
459 set_ip_source_policy(false, v6, IPRULE_PRIORITY_NW, &a_old->addr,
462 system_del_address(dev, a_old);
468 a_new->enabled = true;
469 if (!(a_new->flags & DEVADDR_EXTERNAL) && !keep) {
470 system_add_address(dev, a_new);
472 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
475 set_ip_source_policy(true, v6, IPRULE_PRIORITY_ADDR, &a_new->addr,
476 (v6) ? 128 : 32, iface);
477 set_ip_source_policy(true, v6, IPRULE_PRIORITY_NW, &a_new->addr,
480 if ((a_new->flags & DEVADDR_OFFLINK) || iface->metric)
481 interface_handle_subnet_route(iface, a_new, true);
487 enable_route(struct interface_ip_settings *ip, struct device_route *route)
489 if (ip->no_defaultroute && !route->mask)
496 interface_update_proto_route(struct vlist_tree *tree,
497 struct vlist_node *node_new,
498 struct vlist_node *node_old)
500 struct interface_ip_settings *ip;
501 struct interface *iface;
503 struct device_route *route_old, *route_new;
506 ip = container_of(tree, struct interface_ip_settings, route);
508 dev = iface->l3_dev.dev;
510 route_old = container_of(node_old, struct device_route, node);
511 route_new = container_of(node_new, struct device_route, node);
513 if (node_old && node_new)
514 keep = !memcmp(&route_old->nexthop, &route_new->nexthop, sizeof(route_old->nexthop));
517 if (!(route_old->flags & DEVADDR_EXTERNAL) && route_old->enabled && !keep)
518 system_del_route(dev, route_old);
523 bool _enabled = enable_route(ip, route_new);
525 if (!(route_new->flags & DEVROUTE_METRIC))
526 route_new->metric = iface->metric;
528 if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled)
529 system_add_route(dev, route_new);
531 route_new->iface = iface;
532 route_new->enabled = _enabled;
537 interface_update_host_route(struct vlist_tree *tree,
538 struct vlist_node *node_new,
539 struct vlist_node *node_old)
541 struct interface *iface;
543 struct device_route *route_old, *route_new;
545 iface = container_of(tree, struct interface, host_routes);
546 dev = iface->l3_dev.dev;
548 route_old = container_of(node_old, struct device_route, node);
549 route_new = container_of(node_new, struct device_route, node);
552 system_del_route(dev, route_old);
557 system_add_route(dev, route_new);
562 interface_set_prefix_address(struct device_prefix_assignment *assignment,
563 const struct device_prefix *prefix, struct interface *iface, bool add);
565 static void interface_trigger_ula_prefix(struct interface *iface,
566 const struct device_prefix *prefix, bool enable)
568 if (prefix == ula_prefix || (prefix->addr.s6_addr[0] & 0xfe) != 0xfc)
571 bool external_ula = false;
572 struct device_prefix_assignment *ula_assign = NULL;
573 struct device_prefix *c;
574 list_for_each_entry(c, &prefixes, head) {
575 if (c != ula_prefix && (c->addr.s6_addr[0] & 0xfe) != 0xfc)
578 struct device_prefix_assignment *a;
579 list_for_each_entry(a, &c->assignments, head) {
580 if (!strcmp(a->name, iface->name)) {
590 // Remove ULA assignment if there is an externally managed ULA and vice versa
591 if (ula_assign && ((enable && !external_ula) || (!enable && external_ula)))
592 interface_set_prefix_address(ula_assign, ula_prefix, iface, enable);
597 interface_set_prefix_address(struct device_prefix_assignment *assignment,
598 const struct device_prefix *prefix, struct interface *iface, bool add)
600 const struct interface *uplink = prefix->iface;
601 if (!iface->l3_dev.dev)
604 struct device *l3_downlink = iface->l3_dev.dev;
606 struct device_addr addr;
607 memset(&addr, 0, sizeof(addr));
608 addr.addr.in6 = prefix->addr;
609 addr.addr.in6.s6_addr32[1] |= htonl(assignment->assigned);
610 addr.addr.in6.s6_addr[15] += 1;
611 addr.mask = assignment->length;
612 addr.flags = DEVADDR_INET6;
613 addr.preferred_until = prefix->preferred_until;
614 addr.valid_until = prefix->valid_until;
616 if (!add && assignment->enabled) {
617 time_t now = system_get_rtime();
618 addr.preferred_until = now;
619 if (!addr.valid_until || addr.valid_until - now > 7200)
620 addr.valid_until = now + 7200;
621 system_add_address(l3_downlink, &addr);
622 assignment->enabled = false;
624 interface_trigger_ula_prefix(iface, prefix, true);
625 } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP)) {
626 system_add_address(l3_downlink, &addr);
627 if (uplink && uplink->l3_dev.dev) {
628 int mtu = system_update_ipv6_mtu(
629 uplink->l3_dev.dev, 0);
631 system_update_ipv6_mtu(l3_downlink, mtu);
633 assignment->enabled = true;
635 interface_trigger_ula_prefix(iface, prefix, false);
639 static bool interface_prefix_assign(struct list_head *list,
640 struct device_prefix_assignment *assign)
642 int32_t current = 0, asize = (1 << (64 - assign->length)) - 1;
643 struct device_prefix_assignment *c;
644 list_for_each_entry(c, list, head) {
645 if (assign->assigned != -1) {
646 if (assign->assigned > current && assign->assigned + asize < c->assigned) {
647 list_add_tail(&assign->head, &c->head);
650 } else if (assign->assigned == -1) {
651 current = (current + asize) & (~asize);
652 if (current + asize < c->assigned) {
653 assign->assigned = current;
654 list_add_tail(&assign->head, &c->head);
658 current = (c->assigned + (1 << (64 - c->length)));
663 static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
665 struct device_prefix_assignment *c;
666 struct interface *iface;
668 // Delete all assignments
669 while (!list_empty(&prefix->assignments)) {
670 c = list_first_entry(&prefix->assignments,
671 struct device_prefix_assignment, head);
672 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
673 interface_set_prefix_address(c, prefix, iface, false);
681 // End-of-assignment sentinel
682 c = malloc(sizeof(*c) + 1);
683 c->assigned = 1 << (64 - prefix->length);
686 list_add(&c->head, &prefix->assignments);
689 if (prefix->excl_length > 0) {
690 const char name[] = "!excluded";
691 c = malloc(sizeof(*c) + sizeof(name));
692 c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
693 ((1 << (64 - prefix->length)) - 1);
694 c->length = prefix->excl_length;
695 memcpy(c->name, name, sizeof(name));
696 list_add(&c->head, &prefix->assignments);
699 struct list_head assign_later = LIST_HEAD_INIT(assign_later);
700 vlist_for_each_element(&interfaces, iface, node) {
701 if (iface->config_ip.assignment_length < 48 ||
702 iface->config_ip.assignment_length > 64)
705 size_t namelen = strlen(iface->name) + 1;
706 c = malloc(sizeof(*c) + namelen);
707 c->length = iface->config_ip.assignment_length;
708 c->assigned = iface->config_ip.assignment_hint;
710 memcpy(c->name, iface->name, namelen);
712 // First process all custom assignments, put all others in later-list
713 if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
714 if (c->assigned != -1) {
716 netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
717 "of size %hhu for %s, trying other\n", c->length, c->name);
719 list_add_tail(&c->head, &assign_later);
723 // Then try to assign all other + failed custom assignments
724 while (!list_empty(&assign_later)) {
725 c = list_first_entry(&assign_later, struct device_prefix_assignment, head);
728 bool assigned = false;
730 assigned = interface_prefix_assign(&prefix->assignments, c);
731 } while (!assigned && ++c->length <= 64);
734 netifd_log_message(L_WARNING, "Failed to assign subprefix "
735 "of size %hhu for %s\n", c->length, c->name);
740 list_for_each_entry(c, &prefix->assignments, head)
741 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
742 interface_set_prefix_address(c, prefix, iface, true);
746 void interface_refresh_assignments(bool hint)
748 static bool refresh = false;
749 if (!hint && refresh) {
750 struct device_prefix *p;
751 list_for_each_entry(p, &prefixes, head)
752 interface_update_prefix_assignments(p, true);
759 interface_update_prefix(struct vlist_tree *tree,
760 struct vlist_node *node_new,
761 struct vlist_node *node_old)
763 struct device_prefix *prefix_old, *prefix_new;
764 prefix_old = container_of(node_old, struct device_prefix, node);
765 prefix_new = container_of(node_new, struct device_prefix, node);
767 struct device_route route;
768 memset(&route, 0, sizeof(route));
769 route.flags = DEVADDR_INET6;
770 route.metric = INT32_MAX;
771 route.mask = (node_new) ? prefix_new->length : prefix_old->length;
772 route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
775 struct device_prefix_assignment *c;
776 struct interface *iface;
778 if (node_old && node_new) {
779 // Move assignments and refresh addresses to update valid times
780 list_splice(&prefix_old->assignments, &prefix_new->assignments);
782 list_for_each_entry(c, &prefix_new->assignments, head)
783 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
784 interface_set_prefix_address(c, prefix_new, iface, true);
785 } else if (node_new) {
786 // Set null-route to avoid routing loops and set routing policy
787 system_add_route(NULL, &route);
788 if (prefix_new->iface)
789 set_ip_source_policy(true, true, IPRULE_PRIORITY_NW, &route.addr,
790 route.mask, prefix_new->iface);
793 interface_update_prefix_assignments(prefix_new, true);
794 } else if (node_old) {
795 interface_update_prefix_assignments(prefix_old, false);
798 if (prefix_old->iface)
799 set_ip_source_policy(false, true, IPRULE_PRIORITY_NW, &route.addr,
800 route.mask, prefix_old->iface);
801 system_del_route(NULL, &route);
805 list_del(&prefix_old->head);
810 list_add(&prefix_new->head, &prefixes);
814 struct device_prefix*
815 interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
816 uint8_t length, time_t valid_until, time_t preferred_until,
817 struct in6_addr *excl_addr, uint8_t excl_length)
819 struct device_prefix *prefix = calloc(1, sizeof(*prefix));
820 prefix->length = length;
821 prefix->addr = *addr;
822 prefix->preferred_until = preferred_until;
823 prefix->valid_until = valid_until;
824 prefix->iface = iface;
825 INIT_LIST_HEAD(&prefix->assignments);
828 prefix->excl_addr = *excl_addr;
829 prefix->excl_length = excl_length;
833 vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
835 interface_update_prefix(NULL, &prefix->node, NULL);
841 interface_ip_set_ula_prefix(const char *prefix)
843 char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
845 strncpy(buf, prefix, sizeof(buf) - 1);
846 char *prefixaddr = strtok_r(buf, "/", &saveptr);
848 struct in6_addr addr;
849 if (!prefixaddr || inet_pton(AF_INET6, prefixaddr, &addr) < 1) {
851 interface_update_prefix(NULL, NULL, &ula_prefix->node);
858 char *prefixlen = strtok_r(NULL, ",", &saveptr);
859 if (!prefixlen || (length = atoi(prefixlen)) < 1 || length > 64)
862 if (!ula_prefix || !IN6_ARE_ADDR_EQUAL(&addr, &ula_prefix->addr) ||
863 ula_prefix->length != length) {
865 interface_update_prefix(NULL, NULL, &ula_prefix->node);
867 ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
873 interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
875 struct dns_server *s;
877 s = calloc(1, sizeof(*s));
882 if (inet_pton(s->af, str, &s->addr.in))
886 if (inet_pton(s->af, str, &s->addr.in))
893 D(INTERFACE, "Add IPv%c DNS server: %s\n",
894 s->af == AF_INET6 ? '6' : '4', str);
895 vlist_simple_add(&ip->dns_servers, &s->node);
899 interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
901 struct blob_attr *cur;
904 blobmsg_for_each_attr(cur, list, rem) {
905 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
908 if (!blobmsg_check_attr(cur, NULL))
911 interface_add_dns_server(ip, blobmsg_data(cur));
916 interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
918 struct dns_search_domain *s;
919 int len = strlen(str);
921 s = calloc(1, sizeof(*s) + len + 1);
925 D(INTERFACE, "Add DNS search domain: %s\n", str);
926 memcpy(s->name, str, len);
927 vlist_simple_add(&ip->dns_search, &s->node);
931 interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
933 struct blob_attr *cur;
936 blobmsg_for_each_attr(cur, list, rem) {
937 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
940 if (!blobmsg_check_attr(cur, NULL))
943 interface_add_dns_search_domain(ip, blobmsg_data(cur));
948 write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip)
950 struct dns_server *s;
951 struct dns_search_domain *d;
953 char buf[INET6_ADDRSTRLEN];
955 vlist_simple_for_each_element(&ip->dns_servers, s, node) {
956 str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
960 fprintf(f, "nameserver %s\n", str);
963 vlist_simple_for_each_element(&ip->dns_search, d, node) {
964 fprintf(f, "search %s\n", d->name);
969 interface_write_resolv_conf(void)
971 struct interface *iface;
972 char *path = alloca(strlen(resolv_conf) + 5);
974 uint32_t crcold, crcnew;
976 sprintf(path, "%s.tmp", resolv_conf);
978 f = fopen(path, "w+");
980 D(INTERFACE, "Failed to open %s for writing\n", path);
984 vlist_for_each_element(&interfaces, iface, node) {
985 if (iface->state != IFS_UP)
988 if (vlist_simple_empty(&iface->proto_ip.dns_search) &&
989 vlist_simple_empty(&iface->proto_ip.dns_servers) &&
990 vlist_simple_empty(&iface->config_ip.dns_search) &&
991 vlist_simple_empty(&iface->config_ip.dns_servers))
994 fprintf(f, "# Interface %s\n", iface->name);
995 write_resolv_conf_entries(f, &iface->config_ip);
996 if (!iface->proto_ip.no_dns)
997 write_resolv_conf_entries(f, &iface->proto_ip);
1001 crcnew = crc32_file(f);
1004 crcold = crcnew + 1;
1005 f = fopen(resolv_conf, "r");
1007 crcold = crc32_file(f);
1011 if (crcold == crcnew) {
1013 } else if (rename(path, resolv_conf) < 0) {
1014 D(INTERFACE, "Failed to replace %s\n", resolv_conf);
1019 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
1021 struct device_addr *addr;
1022 struct device_route *route;
1025 ip->enabled = enabled;
1026 dev = ip->iface->l3_dev.dev;
1030 vlist_for_each_element(&ip->addr, addr, node) {
1031 if (addr->enabled == enabled)
1035 system_add_address(dev, addr);
1037 system_del_address(dev, addr);
1038 addr->enabled = enabled;
1041 vlist_for_each_element(&ip->route, route, node) {
1042 bool _enabled = enabled;
1044 if (!enable_route(ip, route))
1047 if (route->enabled == _enabled)
1051 if (!(route->flags & DEVROUTE_METRIC))
1052 route->metric = ip->iface->metric;
1054 system_add_route(dev, route);
1056 system_del_route(dev, route);
1057 route->enabled = _enabled;
1060 struct device_prefix *c;
1061 struct device_prefix_assignment *a;
1062 list_for_each_entry(c, &prefixes, head)
1063 list_for_each_entry(a, &c->assignments, head)
1064 if (!strcmp(a->name, ip->iface->name))
1065 interface_set_prefix_address(a, c, ip->iface, enabled);
1067 set_ip_lo_policy(enabled, true, ip->iface);
1068 set_ip_lo_policy(enabled, false, ip->iface);
1072 interface_ip_update_start(struct interface_ip_settings *ip)
1074 if (ip != &ip->iface->config_ip) {
1075 vlist_simple_update(&ip->dns_servers);
1076 vlist_simple_update(&ip->dns_search);
1078 vlist_update(&ip->route);
1079 vlist_update(&ip->addr);
1080 vlist_update(&ip->prefix);
1084 interface_ip_update_complete(struct interface_ip_settings *ip)
1086 vlist_simple_flush(&ip->dns_servers);
1087 vlist_simple_flush(&ip->dns_search);
1088 vlist_flush(&ip->route);
1089 vlist_flush(&ip->addr);
1090 vlist_flush(&ip->prefix);
1091 interface_write_resolv_conf();
1095 interface_ip_flush(struct interface_ip_settings *ip)
1097 if (ip == &ip->iface->proto_ip)
1098 vlist_flush_all(&ip->iface->host_routes);
1099 vlist_simple_flush_all(&ip->dns_servers);
1100 vlist_simple_flush_all(&ip->dns_search);
1101 vlist_flush_all(&ip->route);
1102 vlist_flush_all(&ip->addr);
1103 vlist_flush_all(&ip->prefix);
1107 __interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
1111 vlist_simple_init(&ip->dns_search, struct dns_search_domain, node);
1112 vlist_simple_init(&ip->dns_servers, struct dns_server, node);
1113 vlist_init(&ip->route, route_cmp, interface_update_proto_route);
1114 vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
1115 vlist_init(&ip->prefix, prefix_cmp, interface_update_prefix);
1119 interface_ip_init(struct interface *iface)
1121 __interface_ip_init(&iface->proto_ip, iface);
1122 __interface_ip_init(&iface->config_ip, iface);
1123 vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);
1128 interface_ip_valid_until_handler(struct uloop_timeout *t)
1130 time_t now = system_get_rtime();
1131 struct interface *iface;
1132 vlist_for_each_element(&interfaces, iface, node) {
1133 if (iface->state != IFS_UP)
1136 struct device_addr *addr, *addrp;
1137 struct device_route *route, *routep;
1138 struct device_prefix *pref, *prefp;
1140 vlist_for_each_element_safe(&iface->proto_ip.addr, addr, node, addrp)
1141 if (addr->valid_until && addr->valid_until < now)
1142 vlist_delete(&iface->proto_ip.addr, &addr->node);
1144 vlist_for_each_element_safe(&iface->proto_ip.route, route, node, routep)
1145 if (route->valid_until && route->valid_until < now)
1146 vlist_delete(&iface->proto_ip.route, &route->node);
1148 vlist_for_each_element_safe(&iface->proto_ip.prefix, pref, node, prefp)
1149 if (pref->valid_until && pref->valid_until < now)
1150 vlist_delete(&iface->proto_ip.prefix, &pref->node);
1154 uloop_timeout_set(t, 1000);
1158 interface_ip_init_worker(void)
1160 valid_until_timeout.cb = interface_ip_valid_until_handler;
1161 uloop_timeout_set(&valid_until_timeout, 1000);