2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
19 #include <arpa/inet.h>
23 #include "interface.h"
24 #include "interface-ip.h"
39 static const struct blobmsg_policy route_attr
[__ROUTE_MAX
] = {
40 [ROUTE_INTERFACE
] = { .name
= "interface", .type
= BLOBMSG_TYPE_STRING
},
41 [ROUTE_TARGET
] = { .name
= "target", .type
= BLOBMSG_TYPE_STRING
},
42 [ROUTE_MASK
] = { .name
= "netmask", .type
= BLOBMSG_TYPE_STRING
},
43 [ROUTE_GATEWAY
] = { .name
= "gateway", .type
= BLOBMSG_TYPE_STRING
},
44 [ROUTE_METRIC
] = { .name
= "metric", .type
= BLOBMSG_TYPE_INT32
},
45 [ROUTE_MTU
] = { .name
= "mtu", .type
= BLOBMSG_TYPE_INT32
},
48 const struct config_param_list route_attr_list
= {
49 .n_params
= __ROUTE_MAX
,
54 clear_if_addr(union if_addr
*a
, int mask
)
56 int m_bytes
= (mask
+ 7) / 8;
57 uint8_t m_clear
= (1 << (m_bytes
* 8 - mask
)) - 1;
58 uint8_t *p
= (uint8_t *) a
;
60 if (m_bytes
< sizeof(a
))
61 memset(p
+ m_bytes
, 0, sizeof(a
) - m_bytes
);
63 p
[m_bytes
- 1] &= ~m_clear
;
67 match_if_addr(union if_addr
*a1
, union if_addr
*a2
, int mask
)
69 union if_addr
*p1
, *p2
;
71 p1
= alloca(sizeof(*a1
));
72 p2
= alloca(sizeof(*a2
));
74 memcpy(p1
, a1
, sizeof(*a1
));
75 clear_if_addr(p1
, mask
);
76 memcpy(p2
, a2
, sizeof(*a2
));
77 clear_if_addr(p2
, mask
);
79 return !memcmp(p1
, p2
, sizeof(*p1
));
83 __find_ip_addr_target(struct interface_ip_settings
*ip
, union if_addr
*a
, bool v6
)
85 struct device_addr
*addr
;
87 vlist_for_each_element(&ip
->addr
, addr
, node
) {
91 if (v6
!= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
))
94 if (!match_if_addr(&addr
->addr
, a
, addr
->mask
))
104 __find_ip_route_target(struct interface_ip_settings
*ip
, union if_addr
*a
,
105 bool v6
, struct device_route
**res
)
107 struct device_route
*route
;
109 vlist_for_each_element(&ip
->route
, route
, node
) {
113 if (v6
!= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
))
116 if (!match_if_addr(&route
->addr
, a
, route
->mask
))
119 if (!*res
|| route
->mask
< (*res
)->mask
)
125 interface_ip_find_addr_target(struct interface
*iface
, union if_addr
*a
, bool v6
)
127 return __find_ip_addr_target(&iface
->proto_ip
, a
, v6
) ||
128 __find_ip_addr_target(&iface
->config_ip
, a
, v6
);
132 interface_ip_find_route_target(struct interface
*iface
, union if_addr
*a
,
133 bool v6
, struct device_route
**route
)
135 __find_ip_route_target(&iface
->proto_ip
, a
, v6
, route
);
136 __find_ip_route_target(&iface
->config_ip
, a
, v6
, route
);
140 interface_ip_add_target_route(union if_addr
*addr
, bool v6
)
142 struct interface
*iface
;
143 struct device_route
*route
, *r_next
= NULL
;
145 route
= calloc(1, sizeof(*route
));
149 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
150 route
->mask
= v6
? 128 : 32;
151 memcpy(&route
->addr
, addr
, v6
? sizeof(addr
->in6
) : sizeof(addr
->in
));
153 vlist_for_each_element(&interfaces
, iface
, node
) {
154 /* look for locally addressable target first */
155 if (interface_ip_find_addr_target(iface
, addr
, v6
))
158 /* do not stop at the first route, let the lookup compare
159 * masks to find the best match */
160 interface_ip_find_route_target(iface
, addr
, v6
, &r_next
);
166 iface
= r_next
->iface
;
167 memcpy(&route
->nexthop
, &r_next
->nexthop
, sizeof(route
->nexthop
));
168 route
->mtu
= r_next
->mtu
;
169 route
->metric
= r_next
->metric
;
172 route
->iface
= iface
;
173 vlist_add(&iface
->host_routes
, &route
->node
, &route
->flags
);
178 interface_ip_add_route(struct interface
*iface
, struct blob_attr
*attr
, bool v6
)
180 struct interface_ip_settings
*ip
;
181 struct blob_attr
*tb
[__ROUTE_MAX
], *cur
;
182 struct device_route
*route
;
183 int af
= v6
? AF_INET6
: AF_INET
;
185 blobmsg_parse(route_attr
, __ROUTE_MAX
, tb
, blobmsg_data(attr
), blobmsg_data_len(attr
));
188 if ((cur
= tb
[ROUTE_INTERFACE
]) == NULL
)
191 iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
195 ip
= &iface
->config_ip
;
197 ip
= &iface
->proto_ip
;
200 route
= calloc(1, sizeof(*route
));
204 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
205 route
->mask
= v6
? 128 : 32;
206 if ((cur
= tb
[ROUTE_MASK
]) != NULL
) {
207 route
->mask
= parse_netmask_string(blobmsg_data(cur
), v6
);
208 if (route
->mask
> (v6
? 128 : 32))
212 if ((cur
= tb
[ROUTE_TARGET
]) != NULL
) {
213 if (!inet_pton(af
, blobmsg_data(cur
), &route
->addr
)) {
214 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur
));
219 if ((cur
= tb
[ROUTE_GATEWAY
]) != NULL
) {
220 if (!inet_pton(af
, blobmsg_data(cur
), &route
->nexthop
)) {
221 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur
));
226 if ((cur
= tb
[ROUTE_METRIC
]) != NULL
) {
227 route
->metric
= blobmsg_get_u32(cur
);
228 route
->flags
|= DEVROUTE_METRIC
;
231 if ((cur
= tb
[ROUTE_MTU
]) != NULL
)
232 route
->mtu
= blobmsg_get_u32(cur
);
234 vlist_add(&ip
->route
, &route
->node
, &route
->flags
);
242 addr_cmp(const void *k1
, const void *k2
, void *ptr
)
244 return memcmp(k1
, k2
, sizeof(struct device_addr
) -
245 offsetof(struct device_addr
, flags
));
249 route_cmp(const void *k1
, const void *k2
, void *ptr
)
251 return memcmp(k1
, k2
, sizeof(struct device_route
) -
252 offsetof(struct device_route
, flags
));
256 interface_handle_subnet_route(struct interface
*iface
, struct device_addr
*addr
, bool add
)
258 struct device
*dev
= iface
->l3_dev
.dev
;
259 struct device_route route
;
262 route
.flags
= addr
->flags
;
263 route
.mask
= addr
->mask
;
264 memcpy(&route
.addr
, &addr
->addr
, sizeof(route
.addr
));
265 clear_if_addr(&route
.addr
, route
.mask
);
268 route
.flags
|= DEVADDR_KERNEL
;
269 system_del_route(dev
, &route
);
271 route
.flags
&= ~DEVADDR_KERNEL
;
272 route
.metric
= iface
->metric
;
273 system_add_route(dev
, &route
);
275 system_del_route(dev
, &route
);
280 interface_update_proto_addr(struct vlist_tree
*tree
,
281 struct vlist_node
*node_new
,
282 struct vlist_node
*node_old
)
284 struct interface_ip_settings
*ip
;
285 struct interface
*iface
;
287 struct device_addr
*a_new
= NULL
, *a_old
= NULL
;
290 ip
= container_of(tree
, struct interface_ip_settings
, addr
);
292 dev
= iface
->l3_dev
.dev
;
295 a_new
= container_of(node_new
, struct device_addr
, node
);
297 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
301 uint32_t *a
= (uint32_t *) &a_new
->addr
;
303 mask
>>= a_new
->mask
;
304 a_new
->broadcast
= *a
| htonl(mask
);
309 a_old
= container_of(node_old
, struct device_addr
, node
);
311 if (a_new
&& a_old
) {
314 if (a_old
->flags
!= a_new
->flags
)
317 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
318 a_new
->broadcast
!= a_old
->broadcast
)
323 if (!(a_old
->flags
& DEVADDR_EXTERNAL
) && a_old
->enabled
&& !keep
) {
324 interface_handle_subnet_route(iface
, a_old
, false);
325 system_del_address(dev
, a_old
);
331 a_new
->enabled
= true;
332 if (!(a_new
->flags
& DEVADDR_EXTERNAL
) && !keep
) {
333 system_add_address(dev
, a_new
);
335 interface_handle_subnet_route(iface
, a_new
, true);
341 enable_route(struct interface_ip_settings
*ip
, struct device_route
*route
)
343 if (ip
->no_defaultroute
&& !route
->mask
)
350 interface_update_proto_route(struct vlist_tree
*tree
,
351 struct vlist_node
*node_new
,
352 struct vlist_node
*node_old
)
354 struct interface_ip_settings
*ip
;
355 struct interface
*iface
;
357 struct device_route
*route_old
, *route_new
;
360 ip
= container_of(tree
, struct interface_ip_settings
, route
);
362 dev
= iface
->l3_dev
.dev
;
364 route_old
= container_of(node_old
, struct device_route
, node
);
365 route_new
= container_of(node_new
, struct device_route
, node
);
367 if (node_old
&& node_new
)
368 keep
= !memcmp(&route_old
->nexthop
, &route_new
->nexthop
, sizeof(route_old
->nexthop
));
371 if (!(route_old
->flags
& DEVADDR_EXTERNAL
) && route_old
->enabled
&& !keep
)
372 system_del_route(dev
, route_old
);
377 bool _enabled
= enable_route(ip
, route_new
);
379 if (!(route_new
->flags
& DEVROUTE_METRIC
))
380 route_new
->metric
= iface
->metric
;
382 if (!(route_new
->flags
& DEVADDR_EXTERNAL
) && !keep
&& _enabled
)
383 system_add_route(dev
, route_new
);
385 route_new
->iface
= iface
;
386 route_new
->enabled
= _enabled
;
391 interface_update_host_route(struct vlist_tree
*tree
,
392 struct vlist_node
*node_new
,
393 struct vlist_node
*node_old
)
395 struct interface
*iface
;
397 struct device_route
*route_old
, *route_new
;
399 iface
= container_of(tree
, struct interface
, host_routes
);
400 dev
= iface
->l3_dev
.dev
;
402 route_old
= container_of(node_old
, struct device_route
, node
);
403 route_new
= container_of(node_new
, struct device_route
, node
);
406 system_del_route(dev
, route_old
);
411 system_add_route(dev
, route_new
);
415 interface_add_dns_server(struct interface_ip_settings
*ip
, const char *str
)
417 struct dns_server
*s
;
419 s
= calloc(1, sizeof(*s
));
421 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
425 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
432 D(INTERFACE
, "Add IPv%c DNS server: %s\n",
433 s
->af
== AF_INET6
? '6' : '4', str
);
434 vlist_simple_add(&ip
->dns_servers
, &s
->node
);
438 interface_add_dns_server_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
440 struct blob_attr
*cur
;
443 blobmsg_for_each_attr(cur
, list
, rem
) {
444 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
447 if (!blobmsg_check_attr(cur
, NULL
))
450 interface_add_dns_server(ip
, blobmsg_data(cur
));
455 interface_add_dns_search_domain(struct interface_ip_settings
*ip
, const char *str
)
457 struct dns_search_domain
*s
;
458 int len
= strlen(str
);
460 s
= calloc(1, sizeof(*s
) + len
+ 1);
464 D(INTERFACE
, "Add DNS search domain: %s\n", str
);
465 memcpy(s
->name
, str
, len
);
466 vlist_simple_add(&ip
->dns_search
, &s
->node
);
470 interface_add_dns_search_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
472 struct blob_attr
*cur
;
475 blobmsg_for_each_attr(cur
, list
, rem
) {
476 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
479 if (!blobmsg_check_attr(cur
, NULL
))
482 interface_add_dns_search_domain(ip
, blobmsg_data(cur
));
487 write_resolv_conf_entries(FILE *f
, struct interface_ip_settings
*ip
)
489 struct dns_server
*s
;
490 struct dns_search_domain
*d
;
494 vlist_simple_for_each_element(&ip
->dns_servers
, s
, node
) {
495 str
= inet_ntop(s
->af
, &s
->addr
, buf
, sizeof(buf
));
499 fprintf(f
, "nameserver %s\n", str
);
502 vlist_simple_for_each_element(&ip
->dns_search
, d
, node
) {
503 fprintf(f
, "search %s\n", d
->name
);
508 interface_write_resolv_conf(void)
510 struct interface
*iface
;
511 char *path
= alloca(strlen(resolv_conf
) + 5);
514 sprintf(path
, "%s.tmp", resolv_conf
);
516 f
= fopen(path
, "w");
518 D(INTERFACE
, "Failed to open %s for writing\n", path
);
522 vlist_for_each_element(&interfaces
, iface
, node
) {
523 if (iface
->state
!= IFS_UP
)
526 if (vlist_simple_empty(&iface
->proto_ip
.dns_search
) &&
527 vlist_simple_empty(&iface
->proto_ip
.dns_servers
) &&
528 vlist_simple_empty(&iface
->config_ip
.dns_search
) &&
529 vlist_simple_empty(&iface
->config_ip
.dns_servers
))
532 fprintf(f
, "# Interface %s\n", iface
->name
);
533 write_resolv_conf_entries(f
, &iface
->config_ip
);
534 if (!iface
->proto_ip
.no_dns
)
535 write_resolv_conf_entries(f
, &iface
->proto_ip
);
538 if (rename(path
, resolv_conf
) < 0) {
539 D(INTERFACE
, "Failed to replace %s\n", resolv_conf
);
544 void interface_ip_set_enabled(struct interface_ip_settings
*ip
, bool enabled
)
546 struct device_addr
*addr
;
547 struct device_route
*route
;
550 ip
->enabled
= enabled
;
551 dev
= ip
->iface
->l3_dev
.dev
;
555 vlist_for_each_element(&ip
->addr
, addr
, node
) {
556 if (addr
->enabled
== enabled
)
560 system_add_address(dev
, addr
);
562 system_del_address(dev
, addr
);
563 addr
->enabled
= enabled
;
566 vlist_for_each_element(&ip
->route
, route
, node
) {
567 bool _enabled
= enabled
;
569 if (!enable_route(ip
, route
))
572 if (route
->enabled
== _enabled
)
576 if (!(route
->flags
& DEVROUTE_METRIC
))
577 route
->metric
= ip
->iface
->metric
;
579 system_add_route(dev
, route
);
581 system_del_route(dev
, route
);
582 route
->enabled
= _enabled
;
587 interface_ip_update_start(struct interface_ip_settings
*ip
)
589 if (ip
!= &ip
->iface
->config_ip
) {
590 vlist_simple_update(&ip
->dns_servers
);
591 vlist_simple_update(&ip
->dns_search
);
593 vlist_update(&ip
->route
);
594 vlist_update(&ip
->addr
);
598 interface_ip_update_complete(struct interface_ip_settings
*ip
)
600 vlist_simple_flush(&ip
->dns_servers
);
601 vlist_simple_flush(&ip
->dns_search
);
602 vlist_flush(&ip
->route
);
603 vlist_flush(&ip
->addr
);
607 interface_ip_flush(struct interface_ip_settings
*ip
)
609 if (ip
== &ip
->iface
->proto_ip
)
610 vlist_flush_all(&ip
->iface
->host_routes
);
611 vlist_simple_flush_all(&ip
->dns_servers
);
612 vlist_simple_flush_all(&ip
->dns_search
);
613 vlist_flush_all(&ip
->route
);
614 vlist_flush_all(&ip
->addr
);
618 __interface_ip_init(struct interface_ip_settings
*ip
, struct interface
*iface
)
622 vlist_simple_init(&ip
->dns_search
, struct dns_search_domain
, node
);
623 vlist_simple_init(&ip
->dns_servers
, struct dns_server
, node
);
624 vlist_init(&ip
->route
, route_cmp
, interface_update_proto_route
);
625 vlist_init(&ip
->addr
, addr_cmp
, interface_update_proto_addr
);
629 interface_ip_init(struct interface
*iface
)
631 __interface_ip_init(&iface
->proto_ip
, iface
);
632 __interface_ip_init(&iface
->config_ip
, iface
);
633 vlist_init(&iface
->host_routes
, route_cmp
, interface_update_host_route
);