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);
137 __find_ip_addr_target(struct interface_ip_settings *ip, union if_addr *a, bool v6)
139 struct device_addr *addr;
141 vlist_for_each_element(&ip->addr, addr, node) {
145 if (v6 != ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
148 // Handle offlink addresses correctly
149 unsigned int mask = addr->mask;
150 if ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6 &&
151 (addr->flags & DEVADDR_OFFLINK))
154 if (!match_if_addr(&addr->addr, a, mask))
164 __find_ip_route_target(struct interface_ip_settings *ip, union if_addr *a,
165 bool v6, struct device_route **res)
167 struct device_route *route;
169 vlist_for_each_element(&ip->route, route, node) {
173 if (v6 != ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6))
176 if (!match_if_addr(&route->addr, a, route->mask))
179 if (route->flags & DEVROUTE_TABLE)
182 if (!*res || route->mask < (*res)->mask)
188 interface_ip_find_addr_target(struct interface *iface, union if_addr *a, bool v6)
190 return __find_ip_addr_target(&iface->proto_ip, a, v6) ||
191 __find_ip_addr_target(&iface->config_ip, a, v6);
195 interface_ip_find_route_target(struct interface *iface, union if_addr *a,
196 bool v6, struct device_route **route)
198 __find_ip_route_target(&iface->proto_ip, a, v6, route);
199 __find_ip_route_target(&iface->config_ip, a, v6, route);
203 interface_ip_add_target_route(union if_addr *addr, bool v6, struct interface *iface)
205 struct device_route *route, *r_next = NULL;
206 bool defaultroute_target = false;
207 int addrsize = v6 ? sizeof(addr->in6) : sizeof(addr->in);
209 route = calloc(1, sizeof(*route));
213 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
214 route->mask = v6 ? 128 : 32;
215 if (memcmp(&route->addr, addr, addrsize) == 0)
216 defaultroute_target = true;
218 memcpy(&route->addr, addr, addrsize);
221 /* look for locally addressable target first */
222 if (interface_ip_find_addr_target(iface, addr, v6))
225 /* do not stop at the first route, let the lookup compare
226 * masks to find the best match */
227 interface_ip_find_route_target(iface, addr, v6, &r_next);
229 vlist_for_each_element(&interfaces, iface, node) {
230 /* look for locally addressable target first */
231 if (interface_ip_find_addr_target(iface, addr, v6))
234 /* do not stop at the first route, let the lookup compare
235 * masks to find the best match */
236 interface_ip_find_route_target(iface, addr, v6, &r_next);
245 iface = r_next->iface;
246 memcpy(&route->nexthop, &r_next->nexthop, sizeof(route->nexthop));
247 route->mtu = r_next->mtu;
248 route->metric = r_next->metric;
249 route->table = r_next->table;
252 route->iface = iface;
253 if (defaultroute_target)
256 vlist_add(&iface->host_routes, &route->node, route);
261 interface_ip_add_route(struct interface *iface, struct blob_attr *attr, bool v6)
263 struct interface_ip_settings *ip;
264 struct blob_attr *tb[__ROUTE_MAX], *cur;
265 struct device_route *route;
266 int af = v6 ? AF_INET6 : AF_INET;
267 bool is_proto_route = !!iface;
269 blobmsg_parse(route_attr, __ROUTE_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
272 if ((cur = tb[ROUTE_INTERFACE]) == NULL)
275 iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
279 ip = &iface->config_ip;
281 ip = &iface->proto_ip;
284 route = calloc(1, sizeof(*route));
288 route->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
289 route->mask = v6 ? 128 : 32;
290 if ((cur = tb[ROUTE_MASK]) != NULL) {
291 route->mask = parse_netmask_string(blobmsg_data(cur), v6);
292 if (route->mask > (v6 ? 128 : 32))
296 if ((cur = tb[ROUTE_TARGET]) != NULL) {
297 if (!parse_ip_and_netmask(af, blobmsg_data(cur), &route->addr, &route->mask)) {
298 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
303 if ((cur = tb[ROUTE_GATEWAY]) != NULL) {
304 if (!inet_pton(af, blobmsg_data(cur), &route->nexthop)) {
305 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur));
310 if ((cur = tb[ROUTE_METRIC]) != NULL) {
311 route->metric = blobmsg_get_u32(cur);
312 route->flags |= DEVROUTE_METRIC;
314 route->metric = iface->metric;
316 if ((cur = tb[ROUTE_MTU]) != NULL) {
317 route->mtu = blobmsg_get_u32(cur);
318 route->flags |= DEVROUTE_MTU;
321 // Use source-based routing
322 if ((cur = tb[ROUTE_SOURCE]) != NULL) {
323 char *saveptr, *source = alloca(blobmsg_data_len(cur));
324 memcpy(source, blobmsg_data(cur), blobmsg_data_len(cur));
326 const char *addr = strtok_r(source, "/", &saveptr);
327 const char *mask = strtok_r(NULL, "/", &saveptr);
329 if (!addr || inet_pton(af, addr, &route->source) < 1) {
330 DPRINTF("Failed to parse route source: %s\n", addr);
334 route->sourcemask = (mask) ? atoi(mask) : ((af == AF_INET6) ? 128 : 32);
337 if ((cur = tb[ROUTE_ONLINK]) != NULL && blobmsg_get_bool(cur))
338 route->flags |= DEVROUTE_ONLINK;
340 if (is_proto_route) {
341 route->table = (v6) ? iface->ip6table : iface->ip4table;
342 route->flags |= DEVROUTE_SRCTABLE;
345 if ((cur = tb[ROUTE_TABLE]) != NULL) {
346 if (!system_resolve_rt_table(blobmsg_data(cur), &route->table)) {
347 DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
351 /* only set the table flag if not using the main (default) table */
352 if (system_is_default_rt_table(route->table))
356 route->flags |= DEVROUTE_TABLE;
359 if ((cur = tb[ROUTE_VALID]) != NULL) {
360 int64_t valid = blobmsg_get_u32(cur);
361 int64_t valid_until = valid + (int64_t)system_get_rtime();
362 if (valid_until <= LONG_MAX && valid != 0xffffffffLL) // Catch overflow
363 route->valid_until = valid_until;
366 if ((cur = tb[ROUTE_TYPE]) != NULL) {
367 if (!system_resolve_rt_type(blobmsg_data(cur), &route->type)) {
368 DPRINTF("Failed to resolve routing type: %s\n", (char *) blobmsg_data(cur));
371 route->flags |= DEVROUTE_TYPE;
374 vlist_add(&ip->route, &route->node, route);
382 addr_cmp(const void *k1, const void *k2, void *ptr)
384 return memcmp(k1, k2, sizeof(struct device_addr) -
385 offsetof(struct device_addr, flags));
389 route_cmp(const void *k1, const void *k2, void *ptr)
391 const struct device_route *r1 = k1, *r2 = k2;
393 if (r1->mask != r2->mask)
394 return r2->mask - r1->mask;
396 if (r1->metric != r2->metric)
397 return r1->metric - r2->metric;
399 if (r1->flags != r2->flags)
400 return r2->flags - r1->flags;
402 if (r1->sourcemask != r2->sourcemask)
403 return r1->sourcemask - r2->sourcemask;
405 if (r1->table != r2->table)
406 return r1->table - r2->table;
408 int maskcmp = memcmp(&r1->source, &r2->source, sizeof(r1->source));
412 return memcmp(&r1->addr, &r2->addr, sizeof(r1->addr));
416 prefix_cmp(const void *k1, const void *k2, void *ptr)
418 return memcmp(k1, k2, offsetof(struct device_prefix, pclass) -
419 offsetof(struct device_prefix, addr));
423 interface_handle_subnet_route(struct interface *iface, struct device_addr *addr, bool add)
425 struct device *dev = iface->l3_dev.dev;
426 struct device_route route;
428 if (addr->flags & DEVADDR_OFFLINK)
431 memset(&route, 0, sizeof(route));
433 route.flags = addr->flags;
434 route.mask = addr->mask;
435 memcpy(&route.addr, &addr->addr, sizeof(route.addr));
436 clear_if_addr(&route.addr, route.mask);
439 route.flags |= DEVADDR_KERNEL;
440 system_del_route(dev, &route);
442 route.flags &= ~DEVADDR_KERNEL;
443 route.metric = iface->metric;
444 system_add_route(dev, &route);
446 system_del_route(dev, &route);
451 interface_update_proto_addr(struct vlist_tree *tree,
452 struct vlist_node *node_new,
453 struct vlist_node *node_old)
455 struct interface_ip_settings *ip;
456 struct interface *iface;
458 struct device_addr *a_new = NULL, *a_old = NULL;
459 bool replace = false;
463 ip = container_of(tree, struct interface_ip_settings, addr);
465 dev = iface->l3_dev.dev;
467 if (!node_new || !node_old)
468 iface->updated |= IUF_ADDRESS;
471 a_new = container_of(node_new, struct device_addr, node);
473 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
477 uint32_t *a = (uint32_t *) &a_new->addr;
479 mask >>= a_new->mask;
480 a_new->broadcast = *a | htonl(mask);
485 a_old = container_of(node_old, struct device_addr, node);
487 if (a_new && a_old) {
490 if (a_old->flags != a_new->flags || a_old->failed)
493 if (a_old->valid_until != a_new->valid_until ||
494 a_old->preferred_until != a_new->preferred_until)
497 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
498 a_new->broadcast != a_old->broadcast)
503 if (a_old->enabled && !keep) {
504 if ((a_old->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
507 unsigned int table = (v6) ? iface->ip6table : iface->ip4table;
509 //This is needed for source routing to work correctly. If a device
510 //has two connections to a network using the same subnet, adding
511 //only the network-rule will cause packets to be routed through the
512 //first matching network (source IP matches both masks).
514 set_ip_source_policy(false, v6, IPRULE_PRIORITY_ADDR, &a_old->addr,
515 (v6) ? 128 : 32, table, NULL, NULL);
517 if (a_old->mask != ((v6) ? 128 : 32))
518 set_ip_source_policy(false, v6, IPRULE_PRIORITY_NW, &a_old->addr,
519 a_old->mask, table, NULL, NULL);
522 if (!(a_old->flags & DEVADDR_EXTERNAL)) {
523 interface_handle_subnet_route(iface, a_old, false);
524 system_del_address(dev, a_old);
532 a_new->enabled = true;
533 if (!keep || replace) {
534 if (!(a_new->flags & DEVADDR_EXTERNAL)) {
535 if (system_add_address(dev, a_new))
536 a_new->failed = true;
539 interface_handle_subnet_route(iface, a_new, true);
543 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
546 unsigned int table = (v6) ? iface->ip6table : iface->ip4table;
549 set_ip_source_policy(true, v6, IPRULE_PRIORITY_ADDR, &a_new->addr,
550 (v6) ? 128 : 32, table, NULL, NULL);
552 if (a_new->mask != ((v6) ? 128 : 32))
553 set_ip_source_policy(true, v6, IPRULE_PRIORITY_NW, &a_new->addr,
554 a_new->mask, table, NULL, NULL);
562 enable_route(struct interface_ip_settings *ip, struct device_route *route)
564 if (ip->no_defaultroute && !route->mask)
571 interface_update_proto_route(struct vlist_tree *tree,
572 struct vlist_node *node_new,
573 struct vlist_node *node_old)
575 struct interface_ip_settings *ip;
576 struct interface *iface;
578 struct device_route *route_old, *route_new;
581 ip = container_of(tree, struct interface_ip_settings, route);
583 dev = iface->l3_dev.dev;
585 if (!node_new || !node_old)
586 iface->updated |= IUF_ROUTE;
588 route_old = container_of(node_old, struct device_route, node);
589 route_new = container_of(node_new, struct device_route, node);
591 if (node_old && node_new)
592 keep = !memcmp(&route_old->nexthop, &route_new->nexthop, sizeof(route_old->nexthop)) &&
593 (route_old->mtu == route_new->mtu) && (route_old->type == route_new->type) &&
597 if (!(route_old->flags & DEVADDR_EXTERNAL) && route_old->enabled && !keep)
598 system_del_route(dev, route_old);
604 bool _enabled = enable_route(ip, route_new);
606 if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled)
607 if (system_add_route(dev, route_new))
608 route_new->failed = true;
610 route_new->iface = iface;
611 route_new->enabled = _enabled;
616 interface_update_host_route(struct vlist_tree *tree,
617 struct vlist_node *node_new,
618 struct vlist_node *node_old)
620 struct interface *iface;
622 struct device_route *route_old, *route_new;
624 iface = container_of(tree, struct interface, host_routes);
625 dev = iface->l3_dev.dev;
627 route_old = container_of(node_old, struct device_route, node);
628 route_new = container_of(node_new, struct device_route, node);
631 system_del_route(dev, route_old);
636 if (system_add_route(dev, route_new))
637 route_new->failed = true;
642 random_ifaceid(struct in6_addr *addr)
644 static bool initialized = false;
649 gettimeofday(&t, NULL);
650 seed = t.tv_sec ^ t.tv_usec ^ getpid();
654 addr->s6_addr32[2] = (uint32_t)mrand48();
655 addr->s6_addr32[3] = (uint32_t)mrand48();
659 eui64_ifaceid(struct interface *iface, struct in6_addr *addr)
661 /* get mac address */
662 uint8_t *macaddr = iface->l3_dev.dev->settings.macaddr;
663 uint8_t *ifaceid = addr->s6_addr + 8;
664 memcpy(ifaceid,macaddr,3);
665 memcpy(ifaceid + 5,macaddr + 3, 3);
672 generate_ifaceid(struct interface *iface, struct in6_addr *addr)
674 /* generate new iface id */
675 switch (iface->assignment_iface_id_selection) {
678 /* copy host part from assignment_fixed_iface_id */
679 memcpy(addr->s6_addr + 8, iface->assignment_fixed_iface_id.s6_addr + 8, 8);
682 /* randomize last 64 bits */
683 random_ifaceid(addr);
687 eui64_ifaceid(iface, addr);
693 interface_set_prefix_address(struct device_prefix_assignment *assignment,
694 const struct device_prefix *prefix, struct interface *iface, bool add)
696 const struct interface *uplink = prefix->iface;
697 if (!iface->l3_dev.dev)
700 struct device *l3_downlink = iface->l3_dev.dev;
702 struct device_addr addr;
703 struct device_route route;
704 memset(&addr, 0, sizeof(addr));
705 memset(&route, 0, sizeof(route));
707 if (IN6_IS_ADDR_UNSPECIFIED(&assignment->addr)) {
708 addr.addr.in6 = prefix->addr;
709 addr.addr.in6.s6_addr32[1] |= htonl(assignment->assigned);
710 generate_ifaceid(iface, &addr.addr.in6);
711 assignment->addr = addr.addr.in6;
714 addr.addr.in6 = assignment->addr;
716 addr.mask = assignment->length;
717 addr.flags = DEVADDR_INET6 | DEVADDR_OFFLINK;
718 addr.preferred_until = prefix->preferred_until;
719 addr.valid_until = prefix->valid_until;
721 route.flags = DEVADDR_INET6;
722 route.mask = addr.mask < 64 ? 64 : addr.mask;
723 route.addr = addr.addr;
724 clear_if_addr(&route.addr, route.mask);
726 if (!add && assignment->enabled) {
727 time_t now = system_get_rtime();
728 addr.preferred_until = now;
729 if (!addr.valid_until || addr.valid_until - now > 7200)
730 addr.valid_until = now + 7200;
733 if (prefix->iface->ip6table)
734 set_ip_source_policy(false, true, IPRULE_PRIORITY_NW, &addr.addr,
735 addr.mask, prefix->iface->ip6table, iface, NULL);
737 set_ip_source_policy(false, true, IPRULE_PRIORITY_REJECT, &addr.addr,
738 addr.mask, 0, iface, "unreachable");
741 system_del_route(l3_downlink, &route);
742 system_add_address(l3_downlink, &addr);
744 assignment->enabled = false;
745 } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP) &&
746 !system_add_address(l3_downlink, &addr)) {
748 if (prefix->iface && !assignment->enabled) {
749 set_ip_source_policy(true, true, IPRULE_PRIORITY_REJECT, &addr.addr,
750 addr.mask, 0, iface, "unreachable");
752 if (prefix->iface->ip6table)
753 set_ip_source_policy(true, true, IPRULE_PRIORITY_NW, &addr.addr,
754 addr.mask, prefix->iface->ip6table, iface, NULL);
757 route.metric = iface->metric;
758 system_add_route(l3_downlink, &route);
760 if (uplink && uplink->l3_dev.dev && !(l3_downlink->settings.flags & DEV_OPT_MTU6)) {
761 int mtu = system_update_ipv6_mtu(uplink->l3_dev.dev, 0);
762 int mtu_old = system_update_ipv6_mtu(l3_downlink, 0);
764 if (mtu > 0 && mtu_old > mtu)
765 system_update_ipv6_mtu(l3_downlink, mtu);
768 assignment->enabled = true;
772 static bool interface_prefix_assign(struct list_head *list,
773 struct device_prefix_assignment *assign)
775 int32_t current = 0, asize = (1 << (64 - assign->length)) - 1;
776 struct device_prefix_assignment *c;
777 list_for_each_entry(c, list, head) {
778 if (assign->assigned != -1) {
779 if (assign->assigned >= current && assign->assigned + asize < c->assigned) {
780 list_add_tail(&assign->head, &c->head);
783 } else if (assign->assigned == -1) {
784 current = (current + asize) & (~asize);
785 if (current + asize < c->assigned) {
786 assign->assigned = current;
787 list_add_tail(&assign->head, &c->head);
791 current = (c->assigned + (1 << (64 - c->length)));
796 static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
798 struct device_prefix_assignment *c;
799 struct interface *iface;
801 // Delete all assignments
802 while (!list_empty(&prefix->assignments)) {
803 c = list_first_entry(&prefix->assignments,
804 struct device_prefix_assignment, head);
805 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
806 interface_set_prefix_address(c, prefix, iface, false);
814 // End-of-assignment sentinel
815 c = malloc(sizeof(*c) + 1);
816 c->assigned = 1 << (64 - prefix->length);
819 c->addr = in6addr_any;
820 list_add(&c->head, &prefix->assignments);
823 if (prefix->excl_length > 0) {
824 const char name[] = "!excluded";
825 c = malloc(sizeof(*c) + sizeof(name));
826 c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
827 ((1 << (64 - prefix->length)) - 1);
828 c->length = prefix->excl_length;
829 c->addr = in6addr_any;
830 memcpy(c->name, name, sizeof(name));
831 list_add(&c->head, &prefix->assignments);
834 bool assigned_any = false;
835 struct list_head assign_later = LIST_HEAD_INIT(assign_later);
836 vlist_for_each_element(&interfaces, iface, node) {
837 if (iface->assignment_length < 48 ||
838 iface->assignment_length > 64)
841 // Test whether there is a matching class
842 if (!list_empty(&iface->assignment_classes)) {
845 struct interface_assignment_class *c;
846 list_for_each_entry(c, &iface->assignment_classes, head) {
847 if (!strcmp(c->name, prefix->pclass)) {
857 size_t namelen = strlen(iface->name) + 1;
858 c = malloc(sizeof(*c) + namelen);
859 c->length = iface->assignment_length;
860 c->assigned = iface->assignment_hint;
861 c->addr = in6addr_any;
863 memcpy(c->name, iface->name, namelen);
865 // First process all custom assignments, put all others in later-list
866 if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
867 if (c->assigned != -1) {
869 netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
870 "of size %hhu for %s, trying other\n", c->length, c->name);
873 struct list_head *next = &assign_later;
874 struct device_prefix_assignment *n;
875 list_for_each_entry(n, &assign_later, head) {
876 if (n->length < c->length) {
881 list_add_tail(&c->head, next);
884 if (c->assigned != -1)
888 // Then try to assign all other + failed custom assignments
889 while (!list_empty(&assign_later)) {
890 c = list_first_entry(&assign_later, struct device_prefix_assignment, head);
893 bool assigned = false;
895 assigned = interface_prefix_assign(&prefix->assignments, c);
896 } while (!assigned && ++c->length <= 64);
899 netifd_log_message(L_WARNING, "Failed to assign subprefix "
900 "of size %hhu for %s\n", c->length, c->name);
907 list_for_each_entry(c, &prefix->assignments, head)
908 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
909 interface_set_prefix_address(c, prefix, iface, true);
912 netifd_log_message(L_WARNING, "You have delegated IPv6-prefixes but haven't assigned them "
913 "to any interface. Did you forget to set option ip6assign on your lan-interfaces?");
917 void interface_refresh_assignments(bool hint)
919 static bool refresh = false;
920 if (!hint && refresh) {
921 struct device_prefix *p;
922 list_for_each_entry(p, &prefixes, head)
923 interface_update_prefix_assignments(p, true);
930 interface_update_prefix(struct vlist_tree *tree,
931 struct vlist_node *node_new,
932 struct vlist_node *node_old)
934 struct device_prefix *prefix_old, *prefix_new;
935 prefix_old = container_of(node_old, struct device_prefix, node);
936 prefix_new = container_of(node_new, struct device_prefix, node);
938 struct interface_ip_settings *ip = container_of(tree, struct interface_ip_settings, prefix);
939 if (tree && (!node_new || !node_old))
940 ip->iface->updated |= IUF_PREFIX;
942 struct device_route route;
943 memset(&route, 0, sizeof(route));
944 route.flags = DEVADDR_INET6;
945 route.metric = INT32_MAX;
946 route.mask = (node_new) ? prefix_new->length : prefix_old->length;
947 route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
950 struct device_prefix_assignment *c;
951 struct interface *iface;
953 if (node_old && node_new) {
954 // Move assignments and refresh addresses to update valid times
955 list_splice(&prefix_old->assignments, &prefix_new->assignments);
957 list_for_each_entry(c, &prefix_new->assignments, head)
958 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
959 interface_set_prefix_address(c, prefix_new, iface, true);
960 } else if (node_new) {
961 // Set null-route to avoid routing loops
962 system_add_route(NULL, &route);
964 if (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation)
965 interface_update_prefix_assignments(prefix_new, true);
966 } else if (node_old) {
968 interface_update_prefix_assignments(prefix_old, false);
969 system_del_route(NULL, &route);
973 if (prefix_old->head.next)
974 list_del(&prefix_old->head);
978 if (node_new && (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation))
979 list_add(&prefix_new->head, &prefixes);
983 struct device_prefix*
984 interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
985 uint8_t length, time_t valid_until, time_t preferred_until,
986 struct in6_addr *excl_addr, uint8_t excl_length, const char *pclass)
989 pclass = (iface) ? iface->name : "local";
991 struct device_prefix *prefix = calloc(1, sizeof(*prefix) + strlen(pclass) + 1);
992 prefix->length = length;
993 prefix->addr = *addr;
994 prefix->preferred_until = preferred_until;
995 prefix->valid_until = valid_until;
996 prefix->iface = iface;
997 INIT_LIST_HEAD(&prefix->assignments);
1000 prefix->excl_addr = *excl_addr;
1001 prefix->excl_length = excl_length;
1004 strcpy(prefix->pclass, pclass);
1007 vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
1009 interface_update_prefix(NULL, &prefix->node, NULL);
1015 interface_ip_set_ula_prefix(const char *prefix)
1017 char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
1019 strncpy(buf, prefix, sizeof(buf) - 1);
1020 char *prefixaddr = strtok_r(buf, "/", &saveptr);
1022 struct in6_addr addr;
1023 if (!prefixaddr || inet_pton(AF_INET6, prefixaddr, &addr) < 1) {
1025 interface_update_prefix(NULL, NULL, &ula_prefix->node);
1032 char *prefixlen = strtok_r(NULL, ",", &saveptr);
1033 if (!prefixlen || (length = atoi(prefixlen)) < 1 || length > 64)
1036 if (!ula_prefix || !IN6_ARE_ADDR_EQUAL(&addr, &ula_prefix->addr) ||
1037 ula_prefix->length != length) {
1039 interface_update_prefix(NULL, NULL, &ula_prefix->node);
1041 ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
1042 0, 0, NULL, 0, NULL);
1047 interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
1049 struct dns_server *s;
1051 s = calloc(1, sizeof(*s));
1056 if (inet_pton(s->af, str, &s->addr.in))
1060 if (inet_pton(s->af, str, &s->addr.in))
1067 D(INTERFACE, "Add IPv%c DNS server: %s\n",
1068 s->af == AF_INET6 ? '6' : '4', str);
1069 vlist_simple_add(&ip->dns_servers, &s->node);
1073 interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
1075 struct blob_attr *cur;
1078 blobmsg_for_each_attr(cur, list, rem) {
1079 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1082 if (!blobmsg_check_attr(cur, NULL))
1085 interface_add_dns_server(ip, blobmsg_data(cur));
1090 interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
1092 struct dns_search_domain *s;
1093 int len = strlen(str);
1095 s = calloc(1, sizeof(*s) + len + 1);
1099 D(INTERFACE, "Add DNS search domain: %s\n", str);
1100 memcpy(s->name, str, len);
1101 vlist_simple_add(&ip->dns_search, &s->node);
1105 interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
1107 struct blob_attr *cur;
1110 blobmsg_for_each_attr(cur, list, rem) {
1111 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1114 if (!blobmsg_check_attr(cur, NULL))
1117 interface_add_dns_search_domain(ip, blobmsg_data(cur));
1122 write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip, const char *dev)
1124 struct dns_server *s;
1125 struct dns_search_domain *d;
1127 char buf[INET6_ADDRSTRLEN];
1129 vlist_simple_for_each_element(&ip->dns_servers, s, node) {
1130 str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
1134 if (s->af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&s->addr.in6))
1135 fprintf(f, "nameserver %s%%%s\n", str, dev);
1137 fprintf(f, "nameserver %s\n", str);
1140 vlist_simple_for_each_element(&ip->dns_search, d, node) {
1141 fprintf(f, "search %s\n", d->name);
1146 interface_write_resolv_conf(void)
1148 struct interface *iface;
1149 char *path = alloca(strlen(resolv_conf) + 5);
1151 uint32_t crcold, crcnew;
1153 sprintf(path, "%s.tmp", resolv_conf);
1155 f = fopen(path, "w+");
1157 D(INTERFACE, "Failed to open %s for writing\n", path);
1161 vlist_for_each_element(&interfaces, iface, node) {
1162 if (iface->state != IFS_UP)
1165 if (vlist_simple_empty(&iface->proto_ip.dns_search) &&
1166 vlist_simple_empty(&iface->proto_ip.dns_servers) &&
1167 vlist_simple_empty(&iface->config_ip.dns_search) &&
1168 vlist_simple_empty(&iface->config_ip.dns_servers))
1171 fprintf(f, "# Interface %s\n", iface->name);
1172 write_resolv_conf_entries(f, &iface->config_ip, iface->ifname);
1173 if (!iface->proto_ip.no_dns)
1174 write_resolv_conf_entries(f, &iface->proto_ip, iface->ifname);
1178 crcnew = crc32_file(f);
1181 crcold = crcnew + 1;
1182 f = fopen(resolv_conf, "r");
1184 crcold = crc32_file(f);
1188 if (crcold == crcnew) {
1190 } else if (rename(path, resolv_conf) < 0) {
1191 D(INTERFACE, "Failed to replace %s\n", resolv_conf);
1196 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
1198 struct device_addr *addr;
1199 struct device_route *route;
1201 struct interface *iface;
1203 ip->enabled = enabled;
1205 dev = iface->l3_dev.dev;
1209 vlist_for_each_element(&ip->addr, addr, node) {
1210 if (addr->enabled == enabled)
1214 system_add_address(dev, addr);
1216 interface_handle_subnet_route(iface, addr, true);
1218 interface_handle_subnet_route(iface, addr, false);
1219 system_del_address(dev, addr);
1221 addr->enabled = enabled;
1224 vlist_for_each_element(&ip->route, route, node) {
1225 bool _enabled = enabled;
1227 if (!enable_route(ip, route))
1230 if (route->enabled == _enabled)
1234 if (!(route->flags & DEVROUTE_METRIC))
1235 route->metric = ip->iface->metric;
1237 if (!(route->flags & DEVROUTE_TABLE)) {
1238 route->flags &= ~DEVROUTE_SRCTABLE;
1239 route->table = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6) ?
1240 iface->ip6table : iface->ip4table;
1243 route->flags |= DEVROUTE_SRCTABLE;
1246 if (system_add_route(dev, route))
1247 route->failed = true;
1249 system_del_route(dev, route);
1250 route->enabled = _enabled;
1253 struct device_prefix *c;
1254 struct device_prefix_assignment *a;
1255 list_for_each_entry(c, &prefixes, head)
1256 list_for_each_entry(a, &c->assignments, head)
1257 if (!strcmp(a->name, ip->iface->name))
1258 interface_set_prefix_address(a, c, ip->iface, enabled);
1260 if (ip->iface && ip->iface->l3_dev.dev)
1261 set_ip_source_policy(enabled, true, IPRULE_PRIORITY_REJECT + ip->iface->l3_dev.dev->ifindex,
1262 NULL, 0, 0, ip->iface, "failed_policy");
1266 interface_ip_update_start(struct interface_ip_settings *ip)
1268 if (ip != &ip->iface->config_ip) {
1269 vlist_simple_update(&ip->dns_servers);
1270 vlist_simple_update(&ip->dns_search);
1272 vlist_update(&ip->route);
1273 vlist_update(&ip->addr);
1274 vlist_update(&ip->prefix);
1278 interface_ip_update_complete(struct interface_ip_settings *ip)
1280 vlist_simple_flush(&ip->dns_servers);
1281 vlist_simple_flush(&ip->dns_search);
1282 vlist_flush(&ip->route);
1283 vlist_flush(&ip->addr);
1284 vlist_flush(&ip->prefix);
1285 interface_write_resolv_conf();
1289 interface_ip_flush(struct interface_ip_settings *ip)
1291 if (ip == &ip->iface->proto_ip)
1292 vlist_flush_all(&ip->iface->host_routes);
1293 vlist_simple_flush_all(&ip->dns_servers);
1294 vlist_simple_flush_all(&ip->dns_search);
1295 vlist_flush_all(&ip->route);
1296 vlist_flush_all(&ip->addr);
1297 vlist_flush_all(&ip->prefix);
1301 __interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
1305 vlist_simple_init(&ip->dns_search, struct dns_search_domain, node);
1306 vlist_simple_init(&ip->dns_servers, struct dns_server, node);
1307 vlist_init(&ip->route, route_cmp, interface_update_proto_route);
1308 vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
1309 vlist_init(&ip->prefix, prefix_cmp, interface_update_prefix);
1313 interface_ip_init(struct interface *iface)
1315 __interface_ip_init(&iface->proto_ip, iface);
1316 __interface_ip_init(&iface->config_ip, iface);
1317 vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);
1321 interface_ip_valid_until_handler(struct uloop_timeout *t)
1323 time_t now = system_get_rtime();
1324 struct interface *iface;
1325 vlist_for_each_element(&interfaces, iface, node) {
1326 if (iface->state != IFS_UP)
1329 struct device_addr *addr, *addrp;
1330 struct device_route *route, *routep;
1331 struct device_prefix *pref, *prefp;
1333 vlist_for_each_element_safe(&iface->proto_ip.addr, addr, node, addrp)
1334 if (addr->valid_until && addr->valid_until < now)
1335 vlist_delete(&iface->proto_ip.addr, &addr->node);
1337 vlist_for_each_element_safe(&iface->proto_ip.route, route, node, routep)
1338 if (route->valid_until && route->valid_until < now)
1339 vlist_delete(&iface->proto_ip.route, &route->node);
1341 vlist_for_each_element_safe(&iface->proto_ip.prefix, pref, node, prefp)
1342 if (pref->valid_until && pref->valid_until < now)
1343 vlist_delete(&iface->proto_ip.prefix, &pref->node);
1347 uloop_timeout_set(t, 1000);
1351 interface_ip_init_worker(void)
1353 valid_until_timeout.cb = interface_ip_valid_until_handler;
1354 uloop_timeout_set(&valid_until_timeout, 1000);