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 match_if_addr(union if_addr
*a1
, union if_addr
*a2
, int mask
)
57 int m_bytes
= (mask
+ 7) / 8;
58 uint8_t m_clear
= (1 << (m_bytes
* 8 - mask
)) - 1;
63 memcpy(p1
, a1
, m_bytes
);
64 memcpy(p2
, a2
, m_bytes
);
66 p1
[m_bytes
- 1] &= ~m_clear
;
67 p2
[m_bytes
- 1] &= ~m_clear
;
69 return !memcmp(p1
, p2
, m_bytes
);
73 __find_ip_addr_target(struct interface_ip_settings
*ip
, union if_addr
*a
, bool v6
)
75 struct device_addr
*addr
;
77 vlist_for_each_element(&ip
->addr
, addr
, node
) {
81 if (v6
!= ((addr
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
))
84 if (!match_if_addr(&addr
->addr
, a
, addr
->mask
))
94 __find_ip_route_target(struct interface_ip_settings
*ip
, union if_addr
*a
,
95 bool v6
, struct device_route
**res
)
97 struct device_route
*route
;
99 vlist_for_each_element(&ip
->route
, route
, node
) {
103 if (v6
!= ((route
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET6
))
106 if (!match_if_addr(&route
->addr
, a
, route
->mask
))
109 if (!*res
|| route
->mask
< (*res
)->mask
)
115 interface_ip_find_addr_target(struct interface
*iface
, union if_addr
*a
, bool v6
)
117 return __find_ip_addr_target(&iface
->proto_ip
, a
, v6
) ||
118 __find_ip_addr_target(&iface
->config_ip
, a
, v6
);
122 interface_ip_find_route_target(struct interface
*iface
, union if_addr
*a
,
123 bool v6
, struct device_route
**route
)
125 __find_ip_route_target(&iface
->proto_ip
, a
, v6
, route
);
126 __find_ip_route_target(&iface
->config_ip
, a
, v6
, route
);
130 interface_ip_add_target_route(union if_addr
*addr
, bool v6
)
132 struct interface
*iface
;
133 struct device_route
*route
, *r_next
= NULL
;
135 route
= calloc(1, sizeof(*route
));
139 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
140 route
->mask
= v6
? 128 : 32;
141 memcpy(&route
->addr
, addr
, v6
? sizeof(addr
->in6
) : sizeof(addr
->in
));
143 vlist_for_each_element(&interfaces
, iface
, node
) {
144 /* look for locally addressable target first */
145 if (interface_ip_find_addr_target(iface
, addr
, v6
))
148 /* do not stop at the first route, let the lookup compare
149 * masks to find the best match */
150 interface_ip_find_route_target(iface
, addr
, v6
, &r_next
);
156 iface
= r_next
->iface
;
157 memcpy(&route
->nexthop
, &r_next
->nexthop
, sizeof(route
->nexthop
));
158 route
->mtu
= r_next
->mtu
;
159 route
->metric
= r_next
->metric
;
162 route
->iface
= iface
;
163 vlist_add(&iface
->host_routes
, &route
->node
, &route
->flags
);
168 interface_ip_add_route(struct interface
*iface
, struct blob_attr
*attr
, bool v6
)
170 struct interface_ip_settings
*ip
;
171 struct blob_attr
*tb
[__ROUTE_MAX
], *cur
;
172 struct device_route
*route
;
173 int af
= v6
? AF_INET6
: AF_INET
;
175 blobmsg_parse(route_attr
, __ROUTE_MAX
, tb
, blobmsg_data(attr
), blobmsg_data_len(attr
));
178 if ((cur
= tb
[ROUTE_INTERFACE
]) == NULL
)
181 iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
185 ip
= &iface
->config_ip
;
187 ip
= &iface
->proto_ip
;
190 route
= calloc(1, sizeof(*route
));
194 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
195 route
->mask
= v6
? 128 : 32;
196 if ((cur
= tb
[ROUTE_MASK
]) != NULL
) {
197 route
->mask
= parse_netmask_string(blobmsg_data(cur
), v6
);
198 if (route
->mask
> (v6
? 128 : 32))
202 if ((cur
= tb
[ROUTE_TARGET
]) != NULL
) {
203 if (!inet_pton(af
, blobmsg_data(cur
), &route
->addr
)) {
204 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur
));
209 if ((cur
= tb
[ROUTE_GATEWAY
]) != NULL
) {
210 if (!inet_pton(af
, blobmsg_data(cur
), &route
->nexthop
)) {
211 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur
));
216 if ((cur
= tb
[ROUTE_METRIC
]) != NULL
) {
217 route
->metric
= blobmsg_get_u32(cur
);
218 route
->flags
|= DEVROUTE_METRIC
;
221 if ((cur
= tb
[ROUTE_MTU
]) != NULL
)
222 route
->mtu
= blobmsg_get_u32(cur
);
224 vlist_add(&ip
->route
, &route
->node
, &route
->flags
);
232 addr_cmp(const void *k1
, const void *k2
, void *ptr
)
234 return memcmp(k1
, k2
, sizeof(struct device_addr
) -
235 offsetof(struct device_addr
, flags
));
239 route_cmp(const void *k1
, const void *k2
, void *ptr
)
241 return memcmp(k1
, k2
, sizeof(struct device_route
) -
242 offsetof(struct device_route
, flags
));
246 interface_update_proto_addr(struct vlist_tree
*tree
,
247 struct vlist_node
*node_new
,
248 struct vlist_node
*node_old
)
250 struct interface_ip_settings
*ip
;
251 struct interface
*iface
;
253 struct device_addr
*a_new
= NULL
, *a_old
= NULL
;
256 ip
= container_of(tree
, struct interface_ip_settings
, addr
);
258 dev
= iface
->l3_dev
.dev
;
261 a_new
= container_of(node_new
, struct device_addr
, node
);
263 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
267 uint32_t *a
= (uint32_t *) &a_new
->addr
;
269 mask
>>= a_new
->mask
;
270 a_new
->broadcast
= *a
| mask
;
275 a_old
= container_of(node_old
, struct device_addr
, node
);
277 if (a_new
&& a_old
) {
280 if (a_old
->flags
!= a_new
->flags
)
283 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
284 a_new
->broadcast
!= a_old
->broadcast
)
289 if (!(a_old
->flags
& DEVADDR_EXTERNAL
) && a_old
->enabled
&& !keep
)
290 system_del_address(dev
, a_old
);
295 if (!(a_new
->flags
& DEVADDR_EXTERNAL
) && !keep
)
296 system_add_address(dev
, a_new
);
297 a_new
->enabled
= true;
302 enable_route(struct interface_ip_settings
*ip
, struct device_route
*route
)
304 if (ip
->no_defaultroute
&& !route
->mask
)
311 interface_update_proto_route(struct vlist_tree
*tree
,
312 struct vlist_node
*node_new
,
313 struct vlist_node
*node_old
)
315 struct interface_ip_settings
*ip
;
316 struct interface
*iface
;
318 struct device_route
*route_old
, *route_new
;
321 ip
= container_of(tree
, struct interface_ip_settings
, route
);
323 dev
= iface
->l3_dev
.dev
;
325 route_old
= container_of(node_old
, struct device_route
, node
);
326 route_new
= container_of(node_new
, struct device_route
, node
);
328 if (node_old
&& node_new
)
329 keep
= !memcmp(&route_old
->nexthop
, &route_new
->nexthop
, sizeof(route_old
->nexthop
));
332 if (!(route_old
->flags
& DEVADDR_EXTERNAL
) && route_old
->enabled
&& !keep
)
333 system_del_route(dev
, route_old
);
338 bool _enabled
= enable_route(ip
, route_new
);
340 if (!(route_new
->flags
& DEVADDR_EXTERNAL
) && !keep
&& _enabled
)
341 system_add_route(dev
, route_new
);
343 route_new
->iface
= iface
;
344 route_new
->enabled
= _enabled
;
349 interface_update_host_route(struct vlist_tree
*tree
,
350 struct vlist_node
*node_new
,
351 struct vlist_node
*node_old
)
353 struct interface
*iface
;
355 struct device_route
*route_old
, *route_new
;
357 iface
= container_of(tree
, struct interface
, host_routes
);
358 dev
= iface
->l3_dev
.dev
;
360 route_old
= container_of(node_old
, struct device_route
, node
);
361 route_new
= container_of(node_new
, struct device_route
, node
);
364 system_del_route(dev
, route_old
);
369 system_add_route(dev
, route_new
);
373 interface_add_dns_server(struct interface_ip_settings
*ip
, const char *str
)
375 struct dns_server
*s
;
377 s
= calloc(1, sizeof(*s
));
379 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
383 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
390 D(INTERFACE
, "Add IPv%c DNS server: %s\n",
391 s
->af
== AF_INET6
? '6' : '4', str
);
392 vlist_simple_add(&ip
->dns_servers
, &s
->node
);
396 interface_add_dns_server_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
398 struct blob_attr
*cur
;
401 blobmsg_for_each_attr(cur
, list
, rem
) {
402 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
405 if (!blobmsg_check_attr(cur
, NULL
))
408 interface_add_dns_server(ip
, blobmsg_data(cur
));
413 interface_add_dns_search_domain(struct interface_ip_settings
*ip
, const char *str
)
415 struct dns_search_domain
*s
;
416 int len
= strlen(str
);
418 s
= calloc(1, sizeof(*s
) + len
+ 1);
422 D(INTERFACE
, "Add DNS search domain: %s\n", str
);
423 memcpy(s
->name
, str
, len
);
424 vlist_simple_add(&ip
->dns_search
, &s
->node
);
428 interface_add_dns_search_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
430 struct blob_attr
*cur
;
433 blobmsg_for_each_attr(cur
, list
, rem
) {
434 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
437 if (!blobmsg_check_attr(cur
, NULL
))
440 interface_add_dns_search_domain(ip
, blobmsg_data(cur
));
445 write_resolv_conf_entries(FILE *f
, struct interface_ip_settings
*ip
)
447 struct dns_server
*s
;
448 struct dns_search_domain
*d
;
452 vlist_simple_for_each_element(&ip
->dns_servers
, s
, node
) {
453 str
= inet_ntop(s
->af
, &s
->addr
, buf
, sizeof(buf
));
457 fprintf(f
, "nameserver %s\n", str
);
460 vlist_simple_for_each_element(&ip
->dns_search
, d
, node
) {
461 fprintf(f
, "search %s\n", d
->name
);
466 interface_write_resolv_conf(void)
468 struct interface
*iface
;
469 char *path
= alloca(strlen(resolv_conf
) + 5);
472 sprintf(path
, "%s.tmp", resolv_conf
);
474 f
= fopen(path
, "w");
476 D(INTERFACE
, "Failed to open %s for writing\n", path
);
480 vlist_for_each_element(&interfaces
, iface
, node
) {
481 if (iface
->state
!= IFS_UP
)
484 if (vlist_simple_empty(&iface
->proto_ip
.dns_search
) &&
485 vlist_simple_empty(&iface
->proto_ip
.dns_servers
) &&
486 vlist_simple_empty(&iface
->config_ip
.dns_search
) &&
487 vlist_simple_empty(&iface
->config_ip
.dns_servers
))
490 fprintf(f
, "# Interface %s\n", iface
->name
);
491 write_resolv_conf_entries(f
, &iface
->config_ip
);
492 write_resolv_conf_entries(f
, &iface
->proto_ip
);
495 if (rename(path
, resolv_conf
) < 0) {
496 D(INTERFACE
, "Failed to replace %s\n", resolv_conf
);
501 void interface_ip_set_enabled(struct interface_ip_settings
*ip
, bool enabled
)
503 struct device_addr
*addr
;
504 struct device_route
*route
;
507 ip
->enabled
= enabled
;
508 dev
= ip
->iface
->l3_dev
.dev
;
512 vlist_for_each_element(&ip
->addr
, addr
, node
) {
513 if (addr
->enabled
== enabled
)
517 system_add_address(dev
, addr
);
519 system_del_address(dev
, addr
);
520 addr
->enabled
= enabled
;
523 vlist_for_each_element(&ip
->route
, route
, node
) {
524 bool _enabled
= enabled
;
526 if (!enable_route(ip
, route
))
529 if (route
->enabled
== _enabled
)
533 if (!(route
->flags
& DEVROUTE_METRIC
))
534 route
->metric
= ip
->iface
->metric
;
536 system_add_route(dev
, route
);
538 system_del_route(dev
, route
);
539 route
->enabled
= _enabled
;
544 interface_ip_update_start(struct interface_ip_settings
*ip
)
546 vlist_simple_update(&ip
->dns_servers
);
547 vlist_simple_update(&ip
->dns_search
);
548 vlist_update(&ip
->route
);
549 vlist_update(&ip
->addr
);
553 interface_ip_update_complete(struct interface_ip_settings
*ip
)
555 vlist_simple_flush(&ip
->dns_servers
);
556 vlist_simple_flush(&ip
->dns_search
);
557 vlist_flush(&ip
->route
);
558 vlist_flush(&ip
->addr
);
562 interface_ip_flush(struct interface_ip_settings
*ip
)
564 if (ip
== &ip
->iface
->proto_ip
)
565 vlist_flush_all(&ip
->iface
->host_routes
);
566 vlist_simple_flush_all(&ip
->dns_servers
);
567 vlist_simple_flush_all(&ip
->dns_search
);
568 vlist_flush_all(&ip
->route
);
569 vlist_flush_all(&ip
->addr
);
573 __interface_ip_init(struct interface_ip_settings
*ip
, struct interface
*iface
)
577 vlist_simple_init(&ip
->dns_search
, struct dns_search_domain
, node
);
578 vlist_simple_init(&ip
->dns_servers
, struct dns_server
, node
);
579 vlist_init(&ip
->route
, route_cmp
, interface_update_proto_route
);
580 vlist_init(&ip
->addr
, addr_cmp
, interface_update_proto_addr
);
584 interface_ip_init(struct interface
*iface
)
586 __interface_ip_init(&iface
->proto_ip
, iface
);
587 __interface_ip_init(&iface
->config_ip
, iface
);
588 vlist_init(&iface
->host_routes
, route_cmp
, interface_update_host_route
);