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 if (addr->flags & DEVADDR_OFFLINK)
448 memset(&route, 0, sizeof(route));
450 route.flags = addr->flags;
451 route.mask = addr->mask;
452 memcpy(&route.addr, &addr->addr, sizeof(route.addr));
453 clear_if_addr(&route.addr, route.mask);
456 route.flags |= DEVADDR_KERNEL;
457 system_del_route(dev, &route);
459 route.flags &= ~DEVADDR_KERNEL;
460 route.metric = iface->metric;
461 system_add_route(dev, &route);
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 &&
493 /* /31 and /32 addressing need 255.255.255.255
494 * as broadcast address. */
495 if (a_new->mask >= 31) {
496 a_new->broadcast = (uint32_t) ~0;
499 uint32_t *a = (uint32_t *) &a_new->addr;
501 mask >>= a_new->mask;
502 a_new->broadcast = *a | htonl(mask);
508 a_old = container_of(node_old, struct device_addr, node);
510 if (a_new && a_old) {
513 if (a_old->flags != a_new->flags || a_old->failed)
516 if (a_old->valid_until != a_new->valid_until ||
517 a_old->preferred_until != a_new->preferred_until)
520 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
521 a_new->broadcast != a_old->broadcast)
526 if (a_old->enabled && !keep) {
527 if ((a_old->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
530 //This is needed for source routing to work correctly. If a device
531 //has two connections to a network using the same subnet, adding
532 //only the network-rule will cause packets to be routed through the
533 //first matching network (source IP matches both masks).
534 if (a_old->policy_table)
535 set_ip_source_policy(false, v6, IPRULE_PRIORITY_ADDR, &a_old->addr,
536 (v6) ? 128 : 32, a_old->policy_table, NULL, NULL);
538 if (!(a_old->flags & DEVADDR_EXTERNAL)) {
539 interface_handle_subnet_route(iface, a_old, false);
540 system_del_address(dev, a_old);
548 a_new->enabled = true;
550 if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET6)
553 a_new->policy_table = (v6) ? iface->ip6table : iface->ip4table;
555 if (!keep || replace) {
556 if (!(a_new->flags & DEVADDR_EXTERNAL)) {
557 if (system_add_address(dev, a_new))
558 a_new->failed = true;
561 interface_handle_subnet_route(iface, a_new, true);
565 if (a_new->policy_table)
566 set_ip_source_policy(true, v6, IPRULE_PRIORITY_ADDR, &a_new->addr,
567 (v6) ? 128 : 32, a_new->policy_table, NULL, NULL);
574 enable_route(struct interface_ip_settings *ip, struct device_route *route)
576 if (ip->no_defaultroute && !route->mask)
583 interface_update_proto_route(struct vlist_tree *tree,
584 struct vlist_node *node_new,
585 struct vlist_node *node_old)
587 struct interface_ip_settings *ip;
588 struct interface *iface;
590 struct device_route *route_old, *route_new;
593 ip = container_of(tree, struct interface_ip_settings, route);
595 dev = iface->l3_dev.dev;
597 if (!node_new || !node_old)
598 iface->updated |= IUF_ROUTE;
600 route_old = container_of(node_old, struct device_route, node);
601 route_new = container_of(node_new, struct device_route, node);
603 if (node_old && node_new)
604 keep = !memcmp(&route_old->nexthop, &route_new->nexthop, sizeof(route_old->nexthop)) &&
605 (route_old->mtu == route_new->mtu) && (route_old->type == route_new->type) &&
609 if (!(route_old->flags & DEVADDR_EXTERNAL) && route_old->enabled && !keep)
610 system_del_route(dev, route_old);
616 bool _enabled = enable_route(ip, route_new);
618 if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled)
619 if (system_add_route(dev, route_new))
620 route_new->failed = true;
622 route_new->iface = iface;
623 route_new->enabled = _enabled;
628 interface_update_host_route(struct vlist_tree *tree,
629 struct vlist_node *node_new,
630 struct vlist_node *node_old)
632 struct interface *iface;
634 struct device_route *route_old, *route_new;
636 iface = container_of(tree, struct interface, host_routes);
637 dev = iface->l3_dev.dev;
639 route_old = container_of(node_old, struct device_route, node);
640 route_new = container_of(node_new, struct device_route, node);
643 system_del_route(dev, route_old);
648 if (system_add_route(dev, route_new))
649 route_new->failed = true;
654 random_ifaceid(struct in6_addr *addr)
656 static bool initialized = false;
661 gettimeofday(&t, NULL);
662 seed = t.tv_sec ^ t.tv_usec ^ getpid();
666 addr->s6_addr32[2] = (uint32_t)mrand48();
667 addr->s6_addr32[3] = (uint32_t)mrand48();
671 eui64_ifaceid(struct interface *iface, struct in6_addr *addr)
673 /* get mac address */
674 uint8_t *macaddr = iface->l3_dev.dev->settings.macaddr;
675 uint8_t *ifaceid = addr->s6_addr + 8;
676 memcpy(ifaceid,macaddr,3);
677 memcpy(ifaceid + 5,macaddr + 3, 3);
684 generate_ifaceid(struct interface *iface, struct in6_addr *addr)
686 /* generate new iface id */
687 switch (iface->assignment_iface_id_selection) {
690 /* copy host part from assignment_fixed_iface_id */
691 memcpy(addr->s6_addr + 8, iface->assignment_fixed_iface_id.s6_addr + 8, 8);
694 /* randomize last 64 bits */
695 random_ifaceid(addr);
699 eui64_ifaceid(iface, addr);
705 interface_set_prefix_address(struct device_prefix_assignment *assignment,
706 const struct device_prefix *prefix, struct interface *iface, bool add)
708 const struct interface *uplink = prefix->iface;
709 if (!iface->l3_dev.dev)
712 struct device *l3_downlink = iface->l3_dev.dev;
714 struct device_addr addr;
715 struct device_route route;
716 memset(&addr, 0, sizeof(addr));
717 memset(&route, 0, sizeof(route));
719 if (IN6_IS_ADDR_UNSPECIFIED(&assignment->addr)) {
720 addr.addr.in6 = prefix->addr;
721 addr.addr.in6.s6_addr32[1] |= htonl(assignment->assigned);
722 generate_ifaceid(iface, &addr.addr.in6);
723 assignment->addr = addr.addr.in6;
726 addr.addr.in6 = assignment->addr;
728 addr.mask = assignment->length;
729 addr.flags = DEVADDR_INET6 | DEVADDR_OFFLINK;
730 addr.preferred_until = prefix->preferred_until;
731 addr.valid_until = prefix->valid_until;
733 route.flags = DEVADDR_INET6;
734 route.mask = addr.mask < 64 ? 64 : addr.mask;
735 route.addr = addr.addr;
736 clear_if_addr(&route.addr, route.mask);
738 if (!add && assignment->enabled) {
739 time_t now = system_get_rtime();
740 addr.preferred_until = now;
741 if (!addr.valid_until || addr.valid_until - now > 7200)
742 addr.valid_until = now + 7200;
745 if (prefix->iface->ip6table)
746 set_ip_source_policy(false, true, IPRULE_PRIORITY_NW, &addr.addr,
747 addr.mask, prefix->iface->ip6table, iface, NULL);
749 set_ip_source_policy(false, true, IPRULE_PRIORITY_REJECT, &addr.addr,
750 addr.mask, 0, iface, "unreachable");
753 system_del_route(l3_downlink, &route);
754 system_add_address(l3_downlink, &addr);
756 assignment->enabled = false;
757 } else if (add && (iface->state == IFS_UP || iface->state == IFS_SETUP) &&
758 !system_add_address(l3_downlink, &addr)) {
760 if (prefix->iface && !assignment->enabled) {
761 set_ip_source_policy(true, true, IPRULE_PRIORITY_REJECT, &addr.addr,
762 addr.mask, 0, iface, "unreachable");
764 if (prefix->iface->ip6table)
765 set_ip_source_policy(true, true, IPRULE_PRIORITY_NW, &addr.addr,
766 addr.mask, prefix->iface->ip6table, iface, NULL);
769 route.metric = iface->metric;
770 system_add_route(l3_downlink, &route);
772 if (uplink && uplink->l3_dev.dev && !(l3_downlink->settings.flags & DEV_OPT_MTU6)) {
773 int mtu = system_update_ipv6_mtu(uplink->l3_dev.dev, 0);
774 int mtu_old = system_update_ipv6_mtu(l3_downlink, 0);
776 if (mtu > 0 && mtu_old > mtu)
777 system_update_ipv6_mtu(l3_downlink, mtu);
780 assignment->enabled = true;
784 static bool interface_prefix_assign(struct list_head *list,
785 struct device_prefix_assignment *assign)
787 int32_t current = 0, asize = (1 << (64 - assign->length)) - 1;
788 struct device_prefix_assignment *c;
789 list_for_each_entry(c, list, head) {
790 if (assign->assigned != -1) {
791 if (assign->assigned >= current && assign->assigned + asize < c->assigned) {
792 list_add_tail(&assign->head, &c->head);
795 } else if (assign->assigned == -1) {
796 current = (current + asize) & (~asize);
797 if (current + asize < c->assigned) {
798 assign->assigned = current;
799 list_add_tail(&assign->head, &c->head);
803 current = (c->assigned + (1 << (64 - c->length)));
808 static void interface_update_prefix_assignments(struct device_prefix *prefix, bool setup)
810 struct device_prefix_assignment *c;
811 struct interface *iface;
813 // Delete all assignments
814 while (!list_empty(&prefix->assignments)) {
815 c = list_first_entry(&prefix->assignments,
816 struct device_prefix_assignment, head);
817 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
818 interface_set_prefix_address(c, prefix, iface, false);
826 // End-of-assignment sentinel
827 c = malloc(sizeof(*c) + 1);
828 c->assigned = 1 << (64 - prefix->length);
831 c->addr = in6addr_any;
832 list_add(&c->head, &prefix->assignments);
835 if (prefix->excl_length > 0) {
836 const char name[] = "!excluded";
837 c = malloc(sizeof(*c) + sizeof(name));
838 c->assigned = ntohl(prefix->excl_addr.s6_addr32[1]) &
839 ((1 << (64 - prefix->length)) - 1);
840 c->length = prefix->excl_length;
841 c->addr = in6addr_any;
842 memcpy(c->name, name, sizeof(name));
843 list_add(&c->head, &prefix->assignments);
846 bool assigned_any = false;
847 struct list_head assign_later = LIST_HEAD_INIT(assign_later);
848 vlist_for_each_element(&interfaces, iface, node) {
849 if (iface->assignment_length < 48 ||
850 iface->assignment_length > 64)
853 // Test whether there is a matching class
854 if (!list_empty(&iface->assignment_classes)) {
857 struct interface_assignment_class *c;
858 list_for_each_entry(c, &iface->assignment_classes, head) {
859 if (!strcmp(c->name, prefix->pclass)) {
869 size_t namelen = strlen(iface->name) + 1;
870 c = malloc(sizeof(*c) + namelen);
871 c->length = iface->assignment_length;
872 c->assigned = iface->assignment_hint;
873 c->addr = in6addr_any;
875 memcpy(c->name, iface->name, namelen);
877 // First process all custom assignments, put all others in later-list
878 if (c->assigned == -1 || !interface_prefix_assign(&prefix->assignments, c)) {
879 if (c->assigned != -1) {
881 netifd_log_message(L_WARNING, "Failed to assign requested subprefix "
882 "of size %hhu for %s, trying other\n", c->length, c->name);
885 struct list_head *next = &assign_later;
886 struct device_prefix_assignment *n;
887 list_for_each_entry(n, &assign_later, head) {
888 if (n->length < c->length) {
893 list_add_tail(&c->head, next);
896 if (c->assigned != -1)
900 // Then try to assign all other + failed custom assignments
901 while (!list_empty(&assign_later)) {
902 c = list_first_entry(&assign_later, struct device_prefix_assignment, head);
905 bool assigned = false;
907 assigned = interface_prefix_assign(&prefix->assignments, c);
908 } while (!assigned && ++c->length <= 64);
911 netifd_log_message(L_WARNING, "Failed to assign subprefix "
912 "of size %hhu for %s\n", c->length, c->name);
919 list_for_each_entry(c, &prefix->assignments, head)
920 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
921 interface_set_prefix_address(c, prefix, iface, true);
924 netifd_log_message(L_WARNING, "You have delegated IPv6-prefixes but haven't assigned them "
925 "to any interface. Did you forget to set option ip6assign on your lan-interfaces?");
929 void interface_refresh_assignments(bool hint)
931 static bool refresh = false;
932 if (!hint && refresh) {
933 struct device_prefix *p;
934 list_for_each_entry(p, &prefixes, head)
935 interface_update_prefix_assignments(p, true);
942 interface_update_prefix(struct vlist_tree *tree,
943 struct vlist_node *node_new,
944 struct vlist_node *node_old)
946 struct device_prefix *prefix_old, *prefix_new;
947 prefix_old = container_of(node_old, struct device_prefix, node);
948 prefix_new = container_of(node_new, struct device_prefix, node);
950 struct interface_ip_settings *ip = container_of(tree, struct interface_ip_settings, prefix);
951 if (tree && (!node_new || !node_old))
952 ip->iface->updated |= IUF_PREFIX;
954 struct device_route route;
955 memset(&route, 0, sizeof(route));
956 route.flags = DEVADDR_INET6;
957 route.metric = INT32_MAX;
958 route.mask = (node_new) ? prefix_new->length : prefix_old->length;
959 route.addr.in6 = (node_new) ? prefix_new->addr : prefix_old->addr;
962 struct device_prefix_assignment *c;
963 struct interface *iface;
965 if (node_old && node_new) {
966 // Move assignments and refresh addresses to update valid times
967 list_splice(&prefix_old->assignments, &prefix_new->assignments);
969 list_for_each_entry(c, &prefix_new->assignments, head)
970 if ((iface = vlist_find(&interfaces, c->name, iface, node)))
971 interface_set_prefix_address(c, prefix_new, iface, true);
972 } else if (node_new) {
973 // Set null-route to avoid routing loops
974 system_add_route(NULL, &route);
976 if (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation)
977 interface_update_prefix_assignments(prefix_new, true);
978 } else if (node_old) {
980 interface_update_prefix_assignments(prefix_old, false);
981 system_del_route(NULL, &route);
985 if (prefix_old->head.next)
986 list_del(&prefix_old->head);
990 if (node_new && (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation))
991 list_add(&prefix_new->head, &prefixes);
995 struct device_prefix*
996 interface_ip_add_device_prefix(struct interface *iface, struct in6_addr *addr,
997 uint8_t length, time_t valid_until, time_t preferred_until,
998 struct in6_addr *excl_addr, uint8_t excl_length, const char *pclass)
1001 pclass = (iface) ? iface->name : "local";
1003 struct device_prefix *prefix = calloc(1, sizeof(*prefix) + strlen(pclass) + 1);
1004 prefix->length = length;
1005 prefix->addr = *addr;
1006 prefix->preferred_until = preferred_until;
1007 prefix->valid_until = valid_until;
1008 prefix->iface = iface;
1009 INIT_LIST_HEAD(&prefix->assignments);
1012 prefix->excl_addr = *excl_addr;
1013 prefix->excl_length = excl_length;
1016 strcpy(prefix->pclass, pclass);
1019 vlist_add(&iface->proto_ip.prefix, &prefix->node, &prefix->addr);
1021 interface_update_prefix(NULL, &prefix->node, NULL);
1027 interface_ip_set_ula_prefix(const char *prefix)
1029 char buf[INET6_ADDRSTRLEN + 4] = {0}, *saveptr;
1031 strncpy(buf, prefix, sizeof(buf) - 1);
1032 char *prefixaddr = strtok_r(buf, "/", &saveptr);
1034 struct in6_addr addr;
1035 if (!prefixaddr || inet_pton(AF_INET6, prefixaddr, &addr) < 1) {
1037 interface_update_prefix(NULL, NULL, &ula_prefix->node);
1044 char *prefixlen = strtok_r(NULL, ",", &saveptr);
1045 if (!prefixlen || (length = atoi(prefixlen)) < 1 || length > 64)
1048 if (!ula_prefix || !IN6_ARE_ADDR_EQUAL(&addr, &ula_prefix->addr) ||
1049 ula_prefix->length != length) {
1051 interface_update_prefix(NULL, NULL, &ula_prefix->node);
1053 ula_prefix = interface_ip_add_device_prefix(NULL, &addr, length,
1054 0, 0, NULL, 0, NULL);
1059 interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
1061 struct dns_server *s;
1063 s = calloc(1, sizeof(*s));
1068 if (inet_pton(s->af, str, &s->addr.in))
1072 if (inet_pton(s->af, str, &s->addr.in))
1079 D(INTERFACE, "Add IPv%c DNS server: %s\n",
1080 s->af == AF_INET6 ? '6' : '4', str);
1081 vlist_simple_add(&ip->dns_servers, &s->node);
1085 interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
1087 struct blob_attr *cur;
1090 blobmsg_for_each_attr(cur, list, rem) {
1091 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1094 if (!blobmsg_check_attr(cur, NULL))
1097 interface_add_dns_server(ip, blobmsg_data(cur));
1102 interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
1104 struct dns_search_domain *s;
1105 int len = strlen(str);
1107 s = calloc(1, sizeof(*s) + len + 1);
1111 D(INTERFACE, "Add DNS search domain: %s\n", str);
1112 memcpy(s->name, str, len);
1113 vlist_simple_add(&ip->dns_search, &s->node);
1117 interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
1119 struct blob_attr *cur;
1122 blobmsg_for_each_attr(cur, list, rem) {
1123 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
1126 if (!blobmsg_check_attr(cur, NULL))
1129 interface_add_dns_search_domain(ip, blobmsg_data(cur));
1134 write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip, const char *dev)
1136 struct dns_server *s;
1137 struct dns_search_domain *d;
1139 char buf[INET6_ADDRSTRLEN];
1141 vlist_simple_for_each_element(&ip->dns_servers, s, node) {
1142 str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
1146 if (s->af == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&s->addr.in6))
1147 fprintf(f, "nameserver %s%%%s\n", str, dev);
1149 fprintf(f, "nameserver %s\n", str);
1152 vlist_simple_for_each_element(&ip->dns_search, d, node) {
1153 fprintf(f, "search %s\n", d->name);
1158 interface_write_resolv_conf(void)
1160 struct interface *iface;
1161 char *path = alloca(strlen(resolv_conf) + 5);
1163 uint32_t crcold, crcnew;
1165 sprintf(path, "%s.tmp", resolv_conf);
1167 f = fopen(path, "w+");
1169 D(INTERFACE, "Failed to open %s for writing\n", path);
1173 vlist_for_each_element(&interfaces, iface, node) {
1174 if (iface->state != IFS_UP)
1177 if (vlist_simple_empty(&iface->proto_ip.dns_search) &&
1178 vlist_simple_empty(&iface->proto_ip.dns_servers) &&
1179 vlist_simple_empty(&iface->config_ip.dns_search) &&
1180 vlist_simple_empty(&iface->config_ip.dns_servers))
1183 fprintf(f, "# Interface %s\n", iface->name);
1184 write_resolv_conf_entries(f, &iface->config_ip, iface->ifname);
1185 if (!iface->proto_ip.no_dns)
1186 write_resolv_conf_entries(f, &iface->proto_ip, iface->ifname);
1190 crcnew = crc32_file(f);
1193 crcold = crcnew + 1;
1194 f = fopen(resolv_conf, "r");
1196 crcold = crc32_file(f);
1200 if (crcold == crcnew) {
1202 } else if (rename(path, resolv_conf) < 0) {
1203 D(INTERFACE, "Failed to replace %s\n", resolv_conf);
1208 void interface_ip_set_enabled(struct interface_ip_settings *ip, bool enabled)
1210 struct device_addr *addr;
1211 struct device_route *route;
1213 struct interface *iface;
1215 ip->enabled = enabled;
1217 dev = iface->l3_dev.dev;
1221 vlist_for_each_element(&ip->addr, addr, node) {
1222 bool v6 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET6) ? true : false;
1224 if (addr->enabled == enabled)
1228 system_add_address(dev, addr);
1230 interface_handle_subnet_route(iface, addr, true);
1232 addr->policy_table = (v6) ? iface->ip6table : iface->ip4table;
1233 if (addr->policy_table)
1234 set_ip_source_policy(true, v6, IPRULE_PRIORITY_ADDR, &addr->addr,
1235 (v6) ? 128 : 32, addr->policy_table, NULL, NULL);
1237 interface_handle_subnet_route(iface, addr, false);
1238 system_del_address(dev, addr);
1240 if (addr->policy_table)
1241 set_ip_source_policy(false, v6, IPRULE_PRIORITY_ADDR, &addr->addr,
1242 (v6) ? 128 : 32, addr->policy_table, NULL, NULL);
1244 addr->enabled = enabled;
1247 vlist_for_each_element(&ip->route, route, node) {
1248 bool _enabled = enabled;
1250 if (!enable_route(ip, route))
1253 if (route->enabled == _enabled)
1257 if (!(route->flags & DEVROUTE_METRIC))
1258 route->metric = ip->iface->metric;
1260 if (!(route->flags & DEVROUTE_TABLE)) {
1261 route->flags &= ~DEVROUTE_SRCTABLE;
1262 route->table = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET6) ?
1263 iface->ip6table : iface->ip4table;
1266 route->flags |= DEVROUTE_SRCTABLE;
1269 if (system_add_route(dev, route))
1270 route->failed = true;
1272 system_del_route(dev, route);
1273 route->enabled = _enabled;
1276 struct device_prefix *c;
1277 struct device_prefix_assignment *a;
1278 list_for_each_entry(c, &prefixes, head)
1279 list_for_each_entry(a, &c->assignments, head)
1280 if (!strcmp(a->name, ip->iface->name))
1281 interface_set_prefix_address(a, c, ip->iface, enabled);
1283 if (ip->iface && ip->iface->l3_dev.dev) {
1284 set_ip_lo_policy(enabled, true, ip->iface);
1285 set_ip_lo_policy(enabled, false, ip->iface);
1287 set_ip_source_policy(enabled, true, IPRULE_PRIORITY_REJECT + ip->iface->l3_dev.dev->ifindex,
1288 NULL, 0, 0, ip->iface, "failed_policy");
1293 interface_ip_update_start(struct interface_ip_settings *ip)
1295 if (ip != &ip->iface->config_ip) {
1296 vlist_simple_update(&ip->dns_servers);
1297 vlist_simple_update(&ip->dns_search);
1299 vlist_update(&ip->route);
1300 vlist_update(&ip->addr);
1301 vlist_update(&ip->prefix);
1305 interface_ip_update_complete(struct interface_ip_settings *ip)
1307 vlist_simple_flush(&ip->dns_servers);
1308 vlist_simple_flush(&ip->dns_search);
1309 vlist_flush(&ip->route);
1310 vlist_flush(&ip->addr);
1311 vlist_flush(&ip->prefix);
1312 interface_write_resolv_conf();
1316 interface_ip_flush(struct interface_ip_settings *ip)
1318 if (ip == &ip->iface->proto_ip)
1319 vlist_flush_all(&ip->iface->host_routes);
1320 vlist_simple_flush_all(&ip->dns_servers);
1321 vlist_simple_flush_all(&ip->dns_search);
1322 vlist_flush_all(&ip->route);
1323 vlist_flush_all(&ip->addr);
1324 vlist_flush_all(&ip->prefix);
1328 __interface_ip_init(struct interface_ip_settings *ip, struct interface *iface)
1332 vlist_simple_init(&ip->dns_search, struct dns_search_domain, node);
1333 vlist_simple_init(&ip->dns_servers, struct dns_server, node);
1334 vlist_init(&ip->route, route_cmp, interface_update_proto_route);
1335 vlist_init(&ip->addr, addr_cmp, interface_update_proto_addr);
1336 vlist_init(&ip->prefix, prefix_cmp, interface_update_prefix);
1340 interface_ip_init(struct interface *iface)
1342 __interface_ip_init(&iface->proto_ip, iface);
1343 __interface_ip_init(&iface->config_ip, iface);
1344 vlist_init(&iface->host_routes, route_cmp, interface_update_host_route);
1348 interface_ip_valid_until_handler(struct uloop_timeout *t)
1350 time_t now = system_get_rtime();
1351 struct interface *iface;
1352 vlist_for_each_element(&interfaces, iface, node) {
1353 if (iface->state != IFS_UP)
1356 struct device_addr *addr, *addrp;
1357 struct device_route *route, *routep;
1358 struct device_prefix *pref, *prefp;
1360 vlist_for_each_element_safe(&iface->proto_ip.addr, addr, node, addrp)
1361 if (addr->valid_until && addr->valid_until < now)
1362 vlist_delete(&iface->proto_ip.addr, &addr->node);
1364 vlist_for_each_element_safe(&iface->proto_ip.route, route, node, routep)
1365 if (route->valid_until && route->valid_until < now)
1366 vlist_delete(&iface->proto_ip.route, &route->node);
1368 vlist_for_each_element_safe(&iface->proto_ip.prefix, pref, node, prefp)
1369 if (pref->valid_until && pref->valid_until < now)
1370 vlist_delete(&iface->proto_ip.prefix, &pref->node);
1374 uloop_timeout_set(t, 1000);
1378 interface_ip_init_worker(void)
1380 valid_until_timeout.cb = interface_ip_valid_until_handler;
1381 uloop_timeout_set(&valid_until_timeout, 1000);