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>
21 #include <netinet/in.h>
25 #include "interface.h"
26 #include "interface-ip.h"
46 static const struct blobmsg_policy route_attr[__ROUTE_MAX] = {
47 [ROUTE_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
48 [ROUTE_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
49 [ROUTE_MASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING },
50 [ROUTE_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
51 [ROUTE_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
52 [ROUTE_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
53 [ROUTE_TABLE] = { .name = "table", .type = BLOBMSG_TYPE_STRING },
54 [ROUTE_VALID] = { .name = "valid", .type = BLOBMSG_TYPE_INT32 },
55 [ROUTE_SOURCE] = { .name = "source", .type = BLOBMSG_TYPE_STRING },
56 [ROUTE_ONLINK] = { .name = "onlink", .type = BLOBMSG_TYPE_BOOL },
57 [ROUTE_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING }
60 const struct uci_blob_param_list route_attr_list = {
61 .n_params = __ROUTE_MAX,
66 struct list_head prefixes = LIST_HEAD_INIT(prefixes);
67 static struct device_prefix *ula_prefix = NULL;
68 static struct uloop_timeout valid_until_timeout;
72 clear_if_addr(union if_addr *a, int mask)
74 int m_bytes = (mask + 7) / 8;
75 uint8_t m_clear = (1 << (m_bytes * 8 - mask)) - 1;
76 uint8_t *p = (uint8_t *) a;
78 if (m_bytes < sizeof(*a))
79 memset(p + m_bytes, 0, sizeof(*a) - m_bytes);
81 p[m_bytes - 1] &= ~m_clear;
85 match_if_addr(union if_addr *a1, union if_addr *a2, int mask)
87 union if_addr *p1, *p2;
89 p1 = alloca(sizeof(*a1));
90 p2 = alloca(sizeof(*a2));
92 memcpy(p1, a1, sizeof(*a1));
93 clear_if_addr(p1, mask);
94 memcpy(p2, a2, sizeof(*a2));
95 clear_if_addr(p2, mask);
97 return !memcmp(p1, p2, sizeof(*p1));
100 static int set_ip_source_policy(bool add, bool v6, unsigned int priority,
101 const union if_addr *addr, uint8_t mask, unsigned int table,
102 struct interface *in_iface, const char *action)
104 struct iprule rule = {
105 .flags = IPRULE_PRIORITY,
110 rule.flags |= IPRULE_SRC;
111 rule.src_addr = *addr;
112 rule.src_mask = mask;
116 rule.flags |= IPRULE_LOOKUP;
122 rule.flags |= IPRULE_ACTION;
123 system_resolve_iprule_action(action, &rule.action);
126 if (in_iface && in_iface->l3_dev.dev) {
127 rule.flags |= IPRULE_IN;
128 strcpy(rule.in_dev, in_iface->l3_dev.dev->ifname);
131 rule.flags |= (v6) ? IPRULE_INET6 : IPRULE_INET4;
133 return (add) ? system_add_iprule(&rule) : system_del_iprule(&rule);
136 static int set_ip_lo_policy(bool add, bool v6, struct interface *iface)
138 struct iprule rule = {
139 .flags = IPRULE_IN | IPRULE_LOOKUP | IPRULE_PRIORITY,
140 .priority = IPRULE_PRIORITY_NW + iface->l3_dev.dev->ifindex,
141 .lookup = (v6) ? iface->ip6table : iface->ip4table,
148 rule.flags |= (v6) ? IPRULE_INET6 : IPRULE_INET4;
150 return (add) ? system_add_iprule(&rule) : system_del_iprule(&rule);
154 __find_ip_addr_target(struct interface_ip_settings *ip, union if_addr *a, bool v6)
156 struct device_addr *addr;
158 vlist_for_each_element(&ip->addr, addr, node) {
162 if (v6 != ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
165 // Handle offlink addresses correctly
166 unsigned int mask = addr->mask;
167 if ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6 &&
168 (addr->flags & DEVADDR_OFFLINK))
171 if (!match_if_addr(&addr->addr, a, mask))
181 __find_ip_route_target(struct interface_ip_settings *ip, union if_addr *a,
182 bool v6, struct device_route **res)
184 struct device_route *route;
186 vlist_for_each_element(&ip->route, route, node) {
190 if (v6 != ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
193 if (!match_if_addr(&route->addr, a, route->mask))
196 if (route->flags & DEVROUTE_TABLE)
199 if (!*res || route->mask < (*res)->mask)
205 interface_ip_find_addr_target(struct interface *iface, union if_addr *a, bool v6)
207 return __find_ip_addr_target(&iface->proto_ip, a, v6) ||
208 __find_ip_addr_target(&iface->config_ip, a, v6);
212 interface_ip_find_route_target(struct interface *iface, union if_addr *a,
213 bool v6, struct device_route **route)
215 __find_ip_route_target(&iface->proto_ip, a, v6, route);
216 __find_ip_route_target(&iface->config_ip, a, v6, route);
220 interface_ip_add_target_route(union if_addr *addr, bool v6, struct interface *iface)
222 struct device_route *route, *r_next = NULL;
223 bool defaultroute_target = false;
224 int addrsize = v6 ? sizeof(addr->in6) : sizeof(addr->in);
226 route = calloc(1, sizeof(*route));
230 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
231 route->mask = v6 ? 128 : 32;
232 if (memcmp(&route->addr, addr, addrsize) == 0)
233 defaultroute_target = true;
235 memcpy(&route->addr, addr, addrsize);
238 /* look for locally addressable target first */
239 if (interface_ip_find_addr_target(iface, addr, v6))
242 /* do not stop at the first route, let the lookup compare
243 * masks to find the best match */
244 interface_ip_find_route_target(iface, addr, v6, &r_next);
246 vlist_for_each_element(&interfaces, iface, node) {
247 /* look for locally addressable target first */
248 if (interface_ip_find_addr_target(iface, addr, v6))
251 /* do not stop at the first route, let the lookup compare
252 * masks to find the best match */
253 interface_ip_find_route_target(iface, addr, v6, &r_next);
262 iface = r_next->iface;
263 memcpy(&route->nexthop, &r_next->nexthop, sizeof(route->nexthop));
264 route->mtu = r_next->mtu;
265 route->metric = r_next->metric;
266 route->table = r_next->table;
269 route->iface = iface;
270 if (defaultroute_target)
273 vlist_add(&iface->host_routes, &route->node, route);
278 interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6)
280 struct interface_ip_settings *ip;
281 struct blob_attr *tb[__ROUTE_MAX], *cur;
282 struct device_route *route;
283 int af = v6 ? AF_INET6 : AF_INET;
284 bool is_proto_route = !!iface;
286 blobmsg_parse(route_attr, __ROUTE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
289 if ((cur = tb[ROUTE_INTERFACE]) == NULL)
292 iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
296 ip = &iface->config_ip;
298 ip = &iface->proto_ip;
301 route = calloc(1, sizeof(*route));
305 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
306 route->mask = v6 ? 128 : 32;
307 if ((cur = tb[ROUTE_MASK]) != NULL) {
308 route->mask = parse_netmask_string(blobmsg_data(cur), v6);
309 if (route->mask > (v6 ? 128 : 32))
313 if ((cur = tb[ROUTE_TARGET]) != NULL) {
314 if (!parse_ip_and_netmask(af, blobmsg_data(cur), &route->addr, &route->mask)) {
315 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
320 if ((cur = tb[ROUTE_GATEWAY]) != NULL) {
321 if (!inet_pton(af, blobmsg_data(cur), &route->nexthop)) {
322 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur));
327 if ((cur = tb[ROUTE_METRIC]) != NULL) {
328 route->metric = blobmsg_get_u32(cur);
329 route->flags |= DEVROUTE_METRIC;
331 route->metric = iface->metric;
333 if ((cur = tb[ROUTE_MTU]) != NULL) {
334 route->mtu = blobmsg_get_u32(cur);
335 route->flags |= DEVROUTE_MTU;
338 // Use source-based routing
339 if ((cur = tb[ROUTE_SOURCE]) != NULL) {
340 char *saveptr, *source = alloca(blobmsg_data_len(cur));
341 memcpy(source, blobmsg_data(cur), blobmsg_data_len(cur));
343 const char *addr = strtok_r(source, "/", &saveptr);
344 const char *mask = strtok_r(NULL, "/", &saveptr);
346 if (!addr || inet_pton(af, addr, &route->source) < 1) {
347 DPRINTF("Failed to parse route source: %s\n", addr);
351 route->sourcemask = (mask) ? atoi(mask) : ((af == AF_INET6) ? 128 : 32);
354 if ((cur = tb[ROUTE_ONLINK]) != NULL && blobmsg_get_bool(cur))
355 route->flags |= DEVROUTE_ONLINK;
357 if (is_proto_route) {
358 route->table = (v6) ? iface->ip6table : iface->ip4table;
359 route->flags |= DEVROUTE_SRCTABLE;
362 if ((cur = tb[ROUTE_TABLE]) != NULL) {
363 if (!system_resolve_rt_table(blobmsg_data(cur), &route->table)) {
364 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
368 /* only set the table flag if not using the main (default) table */
369 if (system_is_default_rt_table(route->table))
373 route->flags |= DEVROUTE_TABLE;
376 if ((cur = tb[ROUTE_VALID]) != NULL) {
377 int64_t valid = blobmsg_get_u32(cur);
378 int64_t valid_until = valid + (int64_t)system_get_rtime();
379 if (valid_until <= LONG_MAX && valid != 0xffffffffLL) // Catch overflow
380 route->valid_until = valid_until;
383 if ((cur = tb[ROUTE_TYPE]) != NULL) {
384 if (!system_resolve_rt_type(blobmsg_data(cur), &route->type)) {
385 DPRINTF("Failed to resolve routing type: %s\n", (char *) blobmsg_data(cur));
388 route->flags |= DEVROUTE_TYPE;
391 vlist_add(&ip->route, &route->node, route);
399 addr_cmp(const void *k1, const void *k2, void *ptr)
401 return memcmp(k1, k2, sizeof(struct device_addr) -
402 offsetof(struct device_addr, flags));
406 route_cmp(const void *k1, const void *k2, void *ptr)
408 const struct device_route *r1 = k1, *r2 = k2;
410 if (r1->mask != r2->mask)
411 return r2->mask - r1->mask;
413 if (r1->metric != r2->metric)
414 return r1->metric - r2->metric;
416 if (r1->flags != r2->flags)
417 return r2->flags - r1->flags;
419 if (r1->sourcemask != r2->sourcemask)
420 return r1->sourcemask - r2->sourcemask;
422 if (r1->table != r2->table)
423 return r1->table - r2->table;
425 int maskcmp = memcmp(&r1->source, &r2->source, sizeof(r1->source));
429 return memcmp(&r1->addr, &r2->addr, sizeof(r1->addr));
433 prefix_cmp(const void *k1, const void *k2, void *ptr)
435 return memcmp(k1, k2, offsetof(struct device_prefix, pclass) -
436 offsetof(struct device_prefix, addr));
440 interface_handle_subnet_route(struct interface *iface, struct device_addr *addr, bool add)
442 struct device *dev = iface->l3_dev.dev;
443 struct device_route route;
445 memset(&route, 0, sizeof(route));
447 route.flags = addr->flags;
448 route.mask = addr->mask;
449 memcpy(&route.addr, &addr->addr, sizeof(route.addr));
450 clear_if_addr(&route.addr, route.mask);
453 route.flags |= DEVADDR_KERNEL;
454 system_del_route(dev, &route);
456 if (!(addr->flags & DEVADDR_OFFLINK)) {
457 route.flags &= ~DEVADDR_KERNEL;
458 route.metric = iface->metric;
459 system_add_route(dev, &route);
462 if (!(addr->flags & DEVADDR_OFFLINK))
463 system_del_route(dev, &route);
468 interface_update_proto_addr(struct vlist_tree *tree,
469 struct vlist_node *node_new,
470 struct vlist_node *node_old)
472 struct interface_ip_settings *ip;
473 struct interface *iface;
475 struct device_addr *a_new = NULL, *a_old = NULL;
476 bool replace = false;
480 ip = container_of(tree, struct interface_ip_settings, addr);
482 dev = iface->l3_dev.dev;
484 if (!node_new || !node_old)
485 iface->updated |= IUF_ADDRESS;
488 a_new = container_of(node_new, struct device_addr, node);
490 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
494 uint32_t *a = (uint32_t *) &a_new->addr;
496 mask >>= a_new->mask;
497 a_new->broadcast = *a | htonl(mask);
502 a_old = container_of(node_old, struct device_addr, node);
504 if (a_new && a_old) {
507 if (a_old->flags != a_new->flags || a_old->failed)
510 if (a_old->valid_until != a_new->valid_until ||
511 a_old->preferred_until != a_new->preferred_until)
514 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
515 a_new->broadcast != a_old->broadcast)
520 if (!(a_old->flags & DEVADDR_EXTERNAL) && a_old->enabled && !keep) {
521 interface_handle_subnet_route(iface, a_old, false);
523 if ((a_old->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
526 unsigned int table = (v6) ? iface->ip6table : iface->ip4table;
528 //This is needed for source routing to work correctly. If a device
529 //has two connections to a network using the same subnet, adding
530 //only the network-rule will cause packets to be routed through the
531 //first matching network (source IP matches both masks).
533 set_ip_source_policy(false, v6, IPRULE_PRIORITY_ADDR, &a_old->addr,
534 (v6) ? 128 : 32, table, NULL, NULL);
535 set_ip_source_policy(false, v6, IPRULE_PRIORITY_NW, &a_old->addr,
536 a_old->mask, table, NULL, NULL);
539 system_del_address(dev, a_old);
546 a_new->enabled = true;
547 if (!(a_new->flags & DEVADDR_EXTERNAL) && (!keep || replace)) {
548 if (system_add_address(dev, a_new))
549 a_new->failed = true;
552 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
555 unsigned int table = (v6) ? iface->ip6table : iface->ip4table;
558 set_ip_source_policy(true, v6, IPRULE_PRIORITY_ADDR, &a_new->addr,
559 (v6) ? 128 : 32, table, NULL, NULL);
560 set_ip_source_policy(true, v6, IPRULE_PRIORITY_NW, &a_new->addr,
561 a_new->mask, table, NULL, NULL);
565 if ((a_new->flags & DEVADDR_OFFLINK) || iface->metric)
566 interface_handle_subnet_route(iface, a_new, true);
572 enable_route(struct interface_ip_settings *ip, struct device_route *route)
574 if (ip->no_defaultroute && !route->mask)
581 interface_update_proto_route(struct vlist_tree *tree,
582 struct vlist_node *node_new,
583 struct vlist_node *node_old)
585 struct interface_ip_settings *ip;
586 struct interface *iface;
588 struct device_route *route_old, *route_new;
591 ip = container_of(tree, struct interface_ip_settings, route);
593 dev = iface->l3_dev.dev;
595 if (!node_new || !node_old)
596 iface->updated |= IUF_ROUTE;
598 route_old = container_of(node_old, struct device_route, node);
599 route_new = container_of(node_new, struct device_route, node);
601 if (node_old && node_new)
602 keep = !memcmp(&route_old->nexthop, &route_new->nexthop, sizeof(route_old->nexthop)) &&
603 (route_old->mtu == route_new->mtu) && (route_old->type == route_new->type) &&
604 (route_old->valid_until == route_new->valid_until) && !route_old->failed;
607 if (!(route_old->flags & DEVADDR_EXTERNAL) && route_old->enabled && !keep)
608 system_del_route(dev, route_old);
614 bool _enabled = enable_route(ip, route_new);
616 if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled)
617 if (system_add_route(dev, route_new))
618 route_new->failed = true;
620 route_new->iface = iface;
621 route_new->enabled = _enabled;
626 interface_update_host_route(struct vlist_tree *tree,
627 struct vlist_node *node_new,
628 struct vlist_node *node_old)
630 struct interface *iface;
632 struct device_route *route_old, *route_new;
634 iface = container_of(tree, struct interface, host_routes);
635 dev = iface->l3_dev.dev;
637 route_old = container_of(node_old, struct device_route, node);
638 route_new = container_of(node_new, struct device_route, node);
641 system_del_route(dev, route_old);
646 if (system_add_route(dev, route_new))
647 route_new->failed = true;
652 random_ifaceid(struct in6_addr *addr)
654 static bool initialized = false;
659 gettimeofday(&t, NULL);
660 seed = t.tv_sec ^ t.tv_usec ^ getpid();
664 addr->s6_addr32[2] = (uint32_t)mrand48();
665 addr->s6_addr32[3] = (uint32_t)mrand48();
669 eui64_ifaceid(struct interface *iface, struct in6_addr *addr)
671 /* get mac address */
672 uint8_t *macaddr = iface->l3_dev.dev->settings.macaddr;
673 uint8_t *ifaceid = addr->s6_addr + 8;
674 memcpy(ifaceid,macaddr,3);
675 memcpy(ifaceid + 5,macaddr + 3, 3);
682 generate_ifaceid(struct interface *iface, struct in6_addr *addr)
684 /* generate new iface id */
685 switch (iface->assignment_iface_id_selection) {
688 /* copy host part from assignment_fixed_iface_id */
689 memcpy(addr->s6_addr + 8, iface->assignment_fixed_iface_id.s6_addr + 8, 8);
692 /* randomize last 64 bits */
693 random_ifaceid(addr);
697 eui64_ifaceid(iface, addr);
703 interface_set_prefix_address(struct device_prefix_assignment *assignment,
704 const struct device_prefix *prefix, struct interface *iface, bool add)
706 const struct interface *uplink = prefix->iface;
707 if (!iface->l3_dev.dev)
710 struct device *l3_downlink = iface->l3_dev.dev;
712 struct device_addr addr;
713 memset(&addr, 0, sizeof(addr));
715 if (IN6_IS_ADDR_UNSPECIFIED(&assignment->addr)) {
716 addr.addr.in6 = prefix->addr;
717 addr.addr.in6.s6_addr32[1] |= htonl(assignment->assigned);
718 generate_ifaceid(iface, &addr.addr.in6);
719 assignment->addr = addr.addr.in6;
722 addr.addr.in6 = assignment->addr;
724 addr.mask = assignment->length;
725 addr.flags = DEVADDR_INET6;
726 addr.preferred_until = prefix->preferred_until;
727 addr.valid_until = prefix->valid_until;
729 if (addr.mask < 64) {
731 system_del_address(l3_downlink, &addr);
732 addr.mask = assignment->length;
735 if (!add && assignment->enabled) {
736 time_t now = system_get_rtime();
737 addr.preferred_until = now;
738 if (!addr.valid_until || addr.valid_until - now > 7200)
739 addr.valid_until = now + 7200;
741 system_del_address(l3_downlink, &addr); // Work around dangling prefix routes
744 if (prefix->iface->ip6table)
745 set_ip_source_policy(false, true, IPRULE_PRIORITY_NW, &addr.addr,
746 addr.mask, prefix->iface->ip6table, iface, NULL);
748 set_ip_source_policy(false, true, IPRULE_PRIORITY_REJECT, &addr.addr,
749 addr.mask, 0, iface, "unreachable");
755 interface_handle_subnet_route(iface, &addr, false);
756 system_add_address(l3_downlink, &addr);
758 assignment->enabled = false;
759 } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP) &&
760 !system_add_address(l3_downlink, &addr)) {
761 interface_handle_subnet_route(iface, &addr, false);
763 if (prefix->iface && !assignment->enabled) {
764 set_ip_source_policy(true, true, IPRULE_PRIORITY_REJECT, &addr.addr,
765 addr.mask, 0, iface, "unreachable");
767 if (prefix->iface->ip6table)
768 set_ip_source_policy(true, true, IPRULE_PRIORITY_NW, &addr.addr,
769 addr.mask, prefix->iface->ip6table, iface, NULL);
775 interface_handle_subnet_route(iface, &addr, true);
777 if (uplink && uplink->l3_dev.dev) {
778 int mtu = system_update_ipv6_mtu(
779 uplink->l3_dev.dev, 0);
781 system_update_ipv6_mtu(l3_downlink, mtu);
784 assignment->enabled = true;
788 static bool interface_prefix_assign(struct list_head *list,
789 struct device_prefix_assignment *assign)
791 int32_t current = 0, asize = (1 << (64 - assign->length)) - 1;
792 struct device_prefix_assignment *c;
793 list_for_each_entry(c, list, head) {
794 if (assign->assigned != -1) {
795 if (assign->assigned >= current && assign->assigned + asize < c->assigned) {
796 list_add_tail(&assign->head, &c->head);
799 } else if (assign->assigned == -1) {
800 current = (current + asize) & (~asize);
801 if (current + asize < c->assigned) {
802 assign->assigned = current;
803 list_add_tail(&assign->head, &c->head);
807 current = (c->assigned + (1 << (64 - c->length)));
812 static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
814 struct device_prefix_assignment *c;
815 struct interface *iface;
817 // Delete all assignments
818 while (!list_empty(&prefix->assignments)) {
819 c = list_first_entry(&prefix->assignments,
820 struct device_prefix_assignment, head);
821 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
822 interface_set_prefix_address(c, prefix, iface, false);
830 // End-of-assignment sentinel
831 c = malloc(sizeof(*c) + 1);
832 c->assigned = 1 << (64 - prefix->length);
835 c->addr = in6addr_any;
836 list_add(&c->head, &prefix->assignments);
839 if (prefix->excl_length > 0) {
840 const char name[] = "!excluded";
841 c = malloc(sizeof(*c) + sizeof(name));
842 c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
843 ((1 << (64 - prefix->length)) - 1);
844 c->length = prefix->excl_length;
845 c->addr = in6addr_any;
846 memcpy(c->name, name, sizeof(name));
847 list_add(&c->head, &prefix->assignments);
850 bool assigned_any = false;
851 struct list_head assign_later = LIST_HEAD_INIT(assign_later);
852 vlist_for_each_element(&interfaces, iface, node) {
853 if (iface->assignment_length < 48 ||
854 iface->assignment_length > 64)
857 // Test whether there is a matching class
858 if (!list_empty(&iface->assignment_classes)) {
861 struct interface_assignment_class *c;
862 list_for_each_entry(c, &iface->assignment_classes, head) {
863 if (!strcmp(c->name, prefix->pclass)) {
873 size_t namelen = strlen(iface->name) + 1;
874 c = malloc(sizeof(*c) + namelen);
875 c->length = iface->assignment_length;
876 c->assigned = iface->assignment_hint;
877 c->addr = in6addr_any;
879 memcpy(c->name, iface->name, namelen);
881 // First process all custom assignments, put all others in later-list
882 if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
883 if (c->assigned != -1) {
885 netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
886 "of size %hhu for %s, trying other\n", c->length, c->name);
889 struct list_head *next = &assign_later;
890 struct device_prefix_assignment *n;
891 list_for_each_entry(n, &assign_later, head) {
892 if (n->length < c->length) {
897 list_add_tail(&c->head, next);
900 if (c->assigned != -1)
904 // Then try to assign all other + failed custom assignments
905 while (!list_empty(&assign_later)) {
906 c = list_first_entry(&assign_later, struct device_prefix_assignment, head);
909 bool assigned = false;
911 assigned = interface_prefix_assign(&prefix->assignments, c);
912 } while (!assigned && ++c->length <= 64);
915 netifd_log_message(L_WARNING, "Failed to assign subprefix "
916 "of size %hhu for %s\n", c->length, c->name);
923 list_for_each_entry(c, &prefix->assignments, head)
924 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
925 interface_set_prefix_address(c, prefix, iface, true);
928 netifd_log_message(L_WARNING, "You have delegated IPv6-prefixes but haven't assigned them "
929 "to any interface. Did you forget to set option ip6assign on your lan-interfaces?");
933 void interface_refresh_assignments(bool hint)
935 static bool refresh = false;
936 if (!hint && refresh) {
937 struct device_prefix *p;
938 list_for_each_entry(p, &prefixes, head)
939 interface_update_prefix_assignments(p, true);
946 interface_update_prefix(struct vlist_tree *tree,
947 struct vlist_node *node_new,
948 struct vlist_node *node_old)
950 struct device_prefix *prefix_old, *prefix_new;
951 prefix_old = container_of(node_old, struct device_prefix, node);
952 prefix_new = container_of(node_new, struct device_prefix, node);
954 struct interface_ip_settings *ip = container_of(tree, struct interface_ip_settings, prefix);
955 if (tree && (!node_new || !node_old))
956 ip->iface->updated |= IUF_PREFIX;
958 struct device_route route;
959 memset(&route, 0, sizeof(route));
960 route.flags = DEVADDR_INET6;
961 route.metric = INT32_MAX;
962 route.mask = (node_new) ? prefix_new->length : prefix_old->length;
963 route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
966 struct device_prefix_assignment *c;
967 struct interface *iface;
969 if (node_old && node_new) {
970 // Move assignments and refresh addresses to update valid times
971 list_splice(&prefix_old->assignments, &prefix_new->assignments);
973 list_for_each_entry(c, &prefix_new->assignments, head)
974 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
975 interface_set_prefix_address(c, prefix_new, iface, true);
976 } else if (node_new) {
977 // Set null-route to avoid routing loops
978 system_add_route(NULL, &route);
980 if (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation)
981 interface_update_prefix_assignments(prefix_new, true);
982 } else if (node_old) {
984 interface_update_prefix_assignments(prefix_old, false);
985 system_del_route(NULL, &route);
989 if (prefix_old->head.next)
990 list_del(&prefix_old->head);
994 if (node_new && (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation))
995 list_add(&prefix_new->head, &prefixes);
999 struct device_prefix*
1000 interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
1001 uint8_t length, time_t valid_until, time_t preferred_until,
1002 struct in6_addr *excl_addr, uint8_t excl_length, const char *pclass)
1005 pclass = (iface) ? iface->name : "local";
1007 struct device_prefix *prefix = calloc(1, sizeof(*prefix) + strlen(pclass) + 1);
1008 prefix->length = length;
1009 prefix->addr = *addr;
1010 prefix->preferred_until = preferred_until;
1011 prefix->valid_until = valid_until;
1012 prefix->iface = iface;
1013 INIT_LIST_HEAD(&prefix->assignments);
1016 prefix->excl_addr = *excl_addr;
1017 prefix->excl_length = excl_length;
1020 strcpy(prefix->pclass, pclass);
1023 vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
1025 interface_update_prefix(NULL, &prefix->node, NULL);
1031 interface_ip_set_ula_prefix(const char *prefix)
1033 char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
1035 strncpy(buf, prefix, sizeof(buf) - 1);
1036 char *prefixaddr = strtok_r(buf, "/", &saveptr);
1038 struct in6_addr addr;
1039 if (!prefixaddr || inet_pton(AF_INET6, prefixaddr, &addr) < 1) {
1041 interface_update_prefix(NULL, NULL, &ula_prefix->node);
1048 char *prefixlen = strtok_r(NULL, ",", &saveptr);
1049 if (!prefixlen || (length = atoi(prefixlen)) < 1 || length > 64)
1052 if (!ula_prefix || !IN6_ARE_ADDR_EQUAL(&addr, &ula_prefix->addr) ||
1053 ula_prefix->length != length) {
1055 interface_update_prefix(NULL, NULL, &ula_prefix->node);
1057 ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
1058 0, 0, NULL, 0, NULL);
1063 interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
1065 struct dns_server *s;
1067 s = calloc(1, sizeof(*s));
1072 if (inet_pton(s->af, str, &s->addr.in))
1076 if (inet_pton(s->af, str, &s->addr.in))
1083 D(INTERFACE, "Add IPv%c DNS server: %s\n",
1084 s->af == AF_INET6 ? '6' : '4', str);
1085 vlist_simple_add(&ip->dns_servers, &s->node);
1089 interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
1091 struct blob_attr *cur;
1094 blobmsg_for_each_attr(cur, list, rem) {
1095 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1098 if (!blobmsg_check_attr(cur, NULL))
1101 interface_add_dns_server(ip, blobmsg_data(cur));
1106 interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
1108 struct dns_search_domain *s;
1109 int len = strlen(str);
1111 s = calloc(1, sizeof(*s) + len + 1);
1115 D(INTERFACE, "Add DNS search domain: %s\n", str);
1116 memcpy(s->name, str, len);
1117 vlist_simple_add(&ip->dns_search, &s->node);
1121 interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
1123 struct blob_attr *cur;
1126 blobmsg_for_each_attr(cur, list, rem) {
1127 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1130 if (!blobmsg_check_attr(cur, NULL))
1133 interface_add_dns_search_domain(ip, blobmsg_data(cur));
1138 write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip, const char *dev)
1140 struct dns_server *s;
1141 struct dns_search_domain *d;
1143 char buf[INET6_ADDRSTRLEN];
1145 vlist_simple_for_each_element(&ip->dns_servers, s, node) {
1146 str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
1150 if (s->af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&s->addr.in6))
1151 fprintf(f, "nameserver %s%%%s\n", str, dev);
1153 fprintf(f, "nameserver %s\n", str);
1156 vlist_simple_for_each_element(&ip->dns_search, d, node) {
1157 fprintf(f, "search %s\n", d->name);
1162 interface_write_resolv_conf(void)
1164 struct interface *iface;
1165 char *path = alloca(strlen(resolv_conf) + 5);
1167 uint32_t crcold, crcnew;
1169 sprintf(path, "%s.tmp", resolv_conf);
1171 f = fopen(path, "w+");
1173 D(INTERFACE, "Failed to open %s for writing\n", path);
1177 vlist_for_each_element(&interfaces, iface, node) {
1178 if (iface->state != IFS_UP)
1181 if (vlist_simple_empty(&iface->proto_ip.dns_search) &&
1182 vlist_simple_empty(&iface->proto_ip.dns_servers) &&
1183 vlist_simple_empty(&iface->config_ip.dns_search) &&
1184 vlist_simple_empty(&iface->config_ip.dns_servers))
1187 fprintf(f, "# Interface %s\n", iface->name);
1188 write_resolv_conf_entries(f, &iface->config_ip, iface->ifname);
1189 if (!iface->proto_ip.no_dns)
1190 write_resolv_conf_entries(f, &iface->proto_ip, iface->ifname);
1194 crcnew = crc32_file(f);
1197 crcold = crcnew + 1;
1198 f = fopen(resolv_conf, "r");
1200 crcold = crc32_file(f);
1204 if (crcold == crcnew) {
1206 } else if (rename(path, resolv_conf) < 0) {
1207 D(INTERFACE, "Failed to replace %s\n", resolv_conf);
1212 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
1214 struct device_addr *addr;
1215 struct device_route *route;
1217 struct interface *iface;
1219 ip->enabled = enabled;
1221 dev = iface->l3_dev.dev;
1225 vlist_for_each_element(&ip->addr, addr, node) {
1226 if (addr->enabled == enabled)
1230 system_add_address(dev, addr);
1231 if ((addr->flags & DEVADDR_OFFLINK) || iface->metric)
1232 interface_handle_subnet_route(iface, addr, true);
1234 interface_handle_subnet_route(iface, addr, false);
1235 system_del_address(dev, addr);
1237 addr->enabled = enabled;
1240 vlist_for_each_element(&ip->route, route, node) {
1241 bool _enabled = enabled;
1243 if (!enable_route(ip, route))
1246 if (route->enabled == _enabled)
1250 if (!(route->flags & DEVROUTE_METRIC))
1251 route->metric = ip->iface->metric;
1253 if (system_add_route(dev, route))
1254 route->failed = true;
1256 system_del_route(dev, route);
1257 route->enabled = _enabled;
1260 struct device_prefix *c;
1261 struct device_prefix_assignment *a;
1262 list_for_each_entry(c, &prefixes, head)
1263 list_for_each_entry(a, &c->assignments, head)
1264 if (!strcmp(a->name, ip->iface->name))
1265 interface_set_prefix_address(a, c, ip->iface, enabled);
1267 if (ip->iface && ip->iface->l3_dev.dev) {
1268 set_ip_lo_policy(enabled, true, ip->iface);
1269 set_ip_lo_policy(enabled, false, ip->iface);
1271 set_ip_source_policy(enabled, true, IPRULE_PRIORITY_REJECT + ip->iface->l3_dev.dev->ifindex,
1272 NULL, 0, 0, ip->iface, "failed_policy");
1277 interface_ip_update_start(struct interface_ip_settings *ip)
1279 if (ip != &ip->iface->config_ip) {
1280 vlist_simple_update(&ip->dns_servers);
1281 vlist_simple_update(&ip->dns_search);
1283 vlist_update(&ip->route);
1284 vlist_update(&ip->addr);
1285 vlist_update(&ip->prefix);
1289 interface_ip_update_complete(struct interface_ip_settings *ip)
1291 vlist_simple_flush(&ip->dns_servers);
1292 vlist_simple_flush(&ip->dns_search);
1293 vlist_flush(&ip->route);
1294 vlist_flush(&ip->addr);
1295 vlist_flush(&ip->prefix);
1296 interface_write_resolv_conf();
1300 interface_ip_flush(struct interface_ip_settings *ip)
1302 if (ip == &ip->iface->proto_ip)
1303 vlist_flush_all(&ip->iface->host_routes);
1304 vlist_simple_flush_all(&ip->dns_servers);
1305 vlist_simple_flush_all(&ip->dns_search);
1306 vlist_flush_all(&ip->route);
1307 vlist_flush_all(&ip->addr);
1308 vlist_flush_all(&ip->prefix);
1312 __interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
1316 vlist_simple_init(&ip->dns_search, struct dns_search_domain, node);
1317 vlist_simple_init(&ip->dns_servers, struct dns_server, node);
1318 vlist_init(&ip->route, route_cmp, interface_update_proto_route);
1319 vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
1320 vlist_init(&ip->prefix, prefix_cmp, interface_update_prefix);
1324 interface_ip_init(struct interface *iface)
1326 __interface_ip_init(&iface->proto_ip, iface);
1327 __interface_ip_init(&iface->config_ip, iface);
1328 vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);
1332 interface_ip_valid_until_handler(struct uloop_timeout *t)
1334 time_t now = system_get_rtime();
1335 struct interface *iface;
1336 vlist_for_each_element(&interfaces, iface, node) {
1337 if (iface->state != IFS_UP)
1340 struct device_addr *addr, *addrp;
1341 struct device_route *route, *routep;
1342 struct device_prefix *pref, *prefp;
1344 vlist_for_each_element_safe(&iface->proto_ip.addr, addr, node, addrp)
1345 if (addr->valid_until && addr->valid_until < now)
1346 vlist_delete(&iface->proto_ip.addr, &addr->node);
1348 vlist_for_each_element_safe(&iface->proto_ip.route, route, node, routep)
1349 if (route->valid_until && route->valid_until < now)
1350 vlist_delete(&iface->proto_ip.route, &route->node);
1352 vlist_for_each_element_safe(&iface->proto_ip.prefix, pref, node, prefp)
1353 if (pref->valid_until && pref->valid_until < now)
1354 vlist_delete(&iface->proto_ip.prefix, &pref->node);
1358 uloop_timeout_set(t, 1000);
1362 interface_ip_init_worker(void)
1364 valid_until_timeout.cb = interface_ip_valid_until_handler;
1365 uloop_timeout_set(&valid_until_timeout, 1000);