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
;
144 bool defaultroute_target
= false;
145 int addrsize
= v6
? sizeof(addr
->in6
) : sizeof(addr
->in
);
147 route
= calloc(1, sizeof(*route
));
151 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
152 route
->mask
= v6
? 128 : 32;
153 if (memcmp(&route
->addr
, addr
, addrsize
) == 0)
154 defaultroute_target
= true;
156 memcpy(&route
->addr
, addr
, addrsize
);
158 vlist_for_each_element(&interfaces
, iface
, node
) {
159 /* look for locally addressable target first */
160 if (interface_ip_find_addr_target(iface
, addr
, v6
))
163 /* do not stop at the first route, let the lookup compare
164 * masks to find the best match */
165 interface_ip_find_route_target(iface
, addr
, v6
, &r_next
);
173 iface
= r_next
->iface
;
174 memcpy(&route
->nexthop
, &r_next
->nexthop
, sizeof(route
->nexthop
));
175 route
->mtu
= r_next
->mtu
;
176 route
->metric
= r_next
->metric
;
179 route
->iface
= iface
;
180 if (defaultroute_target
)
183 vlist_add(&iface
->host_routes
, &route
->node
, &route
->flags
);
188 interface_ip_add_route(struct interface
*iface
, struct blob_attr
*attr
, bool v6
)
190 struct interface_ip_settings
*ip
;
191 struct blob_attr
*tb
[__ROUTE_MAX
], *cur
;
192 struct device_route
*route
;
193 int af
= v6
? AF_INET6
: AF_INET
;
195 blobmsg_parse(route_attr
, __ROUTE_MAX
, tb
, blobmsg_data(attr
), blobmsg_data_len(attr
));
198 if ((cur
= tb
[ROUTE_INTERFACE
]) == NULL
)
201 iface
= vlist_find(&interfaces
, blobmsg_data(cur
), iface
, node
);
205 ip
= &iface
->config_ip
;
207 ip
= &iface
->proto_ip
;
210 route
= calloc(1, sizeof(*route
));
214 route
->flags
= v6
? DEVADDR_INET6
: DEVADDR_INET4
;
215 route
->mask
= v6
? 128 : 32;
216 if ((cur
= tb
[ROUTE_MASK
]) != NULL
) {
217 route
->mask
= parse_netmask_string(blobmsg_data(cur
), v6
);
218 if (route
->mask
> (v6
? 128 : 32))
222 if ((cur
= tb
[ROUTE_TARGET
]) != NULL
) {
223 if (!inet_pton(af
, blobmsg_data(cur
), &route
->addr
)) {
224 DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur
));
229 if ((cur
= tb
[ROUTE_GATEWAY
]) != NULL
) {
230 if (!inet_pton(af
, blobmsg_data(cur
), &route
->nexthop
)) {
231 DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur
));
236 if ((cur
= tb
[ROUTE_METRIC
]) != NULL
) {
237 route
->metric
= blobmsg_get_u32(cur
);
238 route
->flags
|= DEVROUTE_METRIC
;
241 if ((cur
= tb
[ROUTE_MTU
]) != NULL
)
242 route
->mtu
= blobmsg_get_u32(cur
);
244 vlist_add(&ip
->route
, &route
->node
, &route
->flags
);
252 addr_cmp(const void *k1
, const void *k2
, void *ptr
)
254 return memcmp(k1
, k2
, sizeof(struct device_addr
) -
255 offsetof(struct device_addr
, flags
));
259 route_cmp(const void *k1
, const void *k2
, void *ptr
)
261 return memcmp(k1
, k2
, sizeof(struct device_route
) -
262 offsetof(struct device_route
, flags
));
266 interface_handle_subnet_route(struct interface
*iface
, struct device_addr
*addr
, bool add
)
268 struct device
*dev
= iface
->l3_dev
.dev
;
269 struct device_route route
;
272 route
.flags
= addr
->flags
;
273 route
.mask
= addr
->mask
;
274 memcpy(&route
.addr
, &addr
->addr
, sizeof(route
.addr
));
275 clear_if_addr(&route
.addr
, route
.mask
);
278 route
.flags
|= DEVADDR_KERNEL
;
279 system_del_route(dev
, &route
);
281 route
.flags
&= ~DEVADDR_KERNEL
;
282 route
.metric
= iface
->metric
;
283 system_add_route(dev
, &route
);
285 system_del_route(dev
, &route
);
290 interface_update_proto_addr(struct vlist_tree
*tree
,
291 struct vlist_node
*node_new
,
292 struct vlist_node
*node_old
)
294 struct interface_ip_settings
*ip
;
295 struct interface
*iface
;
297 struct device_addr
*a_new
= NULL
, *a_old
= NULL
;
300 ip
= container_of(tree
, struct interface_ip_settings
, addr
);
302 dev
= iface
->l3_dev
.dev
;
305 a_new
= container_of(node_new
, struct device_addr
, node
);
307 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
311 uint32_t *a
= (uint32_t *) &a_new
->addr
;
313 mask
>>= a_new
->mask
;
314 a_new
->broadcast
= *a
| htonl(mask
);
319 a_old
= container_of(node_old
, struct device_addr
, node
);
321 if (a_new
&& a_old
) {
324 if (a_old
->flags
!= a_new
->flags
)
327 if ((a_new
->flags
& DEVADDR_FAMILY
) == DEVADDR_INET4
&&
328 a_new
->broadcast
!= a_old
->broadcast
)
333 if (!(a_old
->flags
& DEVADDR_EXTERNAL
) && a_old
->enabled
&& !keep
) {
334 interface_handle_subnet_route(iface
, a_old
, false);
335 system_del_address(dev
, a_old
);
341 a_new
->enabled
= true;
342 if (!(a_new
->flags
& DEVADDR_EXTERNAL
) && !keep
) {
343 system_add_address(dev
, a_new
);
345 interface_handle_subnet_route(iface
, a_new
, true);
351 enable_route(struct interface_ip_settings
*ip
, struct device_route
*route
)
353 if (ip
->no_defaultroute
&& !route
->mask
)
360 interface_update_proto_route(struct vlist_tree
*tree
,
361 struct vlist_node
*node_new
,
362 struct vlist_node
*node_old
)
364 struct interface_ip_settings
*ip
;
365 struct interface
*iface
;
367 struct device_route
*route_old
, *route_new
;
370 ip
= container_of(tree
, struct interface_ip_settings
, route
);
372 dev
= iface
->l3_dev
.dev
;
374 route_old
= container_of(node_old
, struct device_route
, node
);
375 route_new
= container_of(node_new
, struct device_route
, node
);
377 if (node_old
&& node_new
)
378 keep
= !memcmp(&route_old
->nexthop
, &route_new
->nexthop
, sizeof(route_old
->nexthop
));
381 if (!(route_old
->flags
& DEVADDR_EXTERNAL
) && route_old
->enabled
&& !keep
)
382 system_del_route(dev
, route_old
);
387 bool _enabled
= enable_route(ip
, route_new
);
389 if (!(route_new
->flags
& DEVROUTE_METRIC
))
390 route_new
->metric
= iface
->metric
;
392 if (!(route_new
->flags
& DEVADDR_EXTERNAL
) && !keep
&& _enabled
)
393 system_add_route(dev
, route_new
);
395 route_new
->iface
= iface
;
396 route_new
->enabled
= _enabled
;
401 interface_update_host_route(struct vlist_tree
*tree
,
402 struct vlist_node
*node_new
,
403 struct vlist_node
*node_old
)
405 struct interface
*iface
;
407 struct device_route
*route_old
, *route_new
;
409 iface
= container_of(tree
, struct interface
, host_routes
);
410 dev
= iface
->l3_dev
.dev
;
412 route_old
= container_of(node_old
, struct device_route
, node
);
413 route_new
= container_of(node_new
, struct device_route
, node
);
416 system_del_route(dev
, route_old
);
421 system_add_route(dev
, route_new
);
425 interface_add_dns_server(struct interface_ip_settings
*ip
, const char *str
)
427 struct dns_server
*s
;
429 s
= calloc(1, sizeof(*s
));
431 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
435 if (inet_pton(s
->af
, str
, &s
->addr
.in
))
442 D(INTERFACE
, "Add IPv%c DNS server: %s\n",
443 s
->af
== AF_INET6
? '6' : '4', str
);
444 vlist_simple_add(&ip
->dns_servers
, &s
->node
);
448 interface_add_dns_server_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
450 struct blob_attr
*cur
;
453 blobmsg_for_each_attr(cur
, list
, rem
) {
454 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
457 if (!blobmsg_check_attr(cur
, NULL
))
460 interface_add_dns_server(ip
, blobmsg_data(cur
));
465 interface_add_dns_search_domain(struct interface_ip_settings
*ip
, const char *str
)
467 struct dns_search_domain
*s
;
468 int len
= strlen(str
);
470 s
= calloc(1, sizeof(*s
) + len
+ 1);
474 D(INTERFACE
, "Add DNS search domain: %s\n", str
);
475 memcpy(s
->name
, str
, len
);
476 vlist_simple_add(&ip
->dns_search
, &s
->node
);
480 interface_add_dns_search_list(struct interface_ip_settings
*ip
, struct blob_attr
*list
)
482 struct blob_attr
*cur
;
485 blobmsg_for_each_attr(cur
, list
, rem
) {
486 if (blobmsg_type(cur
) != BLOBMSG_TYPE_STRING
)
489 if (!blobmsg_check_attr(cur
, NULL
))
492 interface_add_dns_search_domain(ip
, blobmsg_data(cur
));
497 write_resolv_conf_entries(FILE *f
, struct interface_ip_settings
*ip
)
499 struct dns_server
*s
;
500 struct dns_search_domain
*d
;
504 vlist_simple_for_each_element(&ip
->dns_servers
, s
, node
) {
505 str
= inet_ntop(s
->af
, &s
->addr
, buf
, sizeof(buf
));
509 fprintf(f
, "nameserver %s\n", str
);
512 vlist_simple_for_each_element(&ip
->dns_search
, d
, node
) {
513 fprintf(f
, "search %s\n", d
->name
);
518 interface_write_resolv_conf(void)
520 struct interface
*iface
;
521 char *path
= alloca(strlen(resolv_conf
) + 5);
524 sprintf(path
, "%s.tmp", resolv_conf
);
526 f
= fopen(path
, "w");
528 D(INTERFACE
, "Failed to open %s for writing\n", path
);
532 vlist_for_each_element(&interfaces
, iface
, node
) {
533 if (iface
->state
!= IFS_UP
)
536 if (vlist_simple_empty(&iface
->proto_ip
.dns_search
) &&
537 vlist_simple_empty(&iface
->proto_ip
.dns_servers
) &&
538 vlist_simple_empty(&iface
->config_ip
.dns_search
) &&
539 vlist_simple_empty(&iface
->config_ip
.dns_servers
))
542 fprintf(f
, "# Interface %s\n", iface
->name
);
543 write_resolv_conf_entries(f
, &iface
->config_ip
);
544 if (!iface
->proto_ip
.no_dns
)
545 write_resolv_conf_entries(f
, &iface
->proto_ip
);
548 if (rename(path
, resolv_conf
) < 0) {
549 D(INTERFACE
, "Failed to replace %s\n", resolv_conf
);
554 void interface_ip_set_enabled(struct interface_ip_settings
*ip
, bool enabled
)
556 struct device_addr
*addr
;
557 struct device_route
*route
;
560 ip
->enabled
= enabled
;
561 dev
= ip
->iface
->l3_dev
.dev
;
565 vlist_for_each_element(&ip
->addr
, addr
, node
) {
566 if (addr
->enabled
== enabled
)
570 system_add_address(dev
, addr
);
572 system_del_address(dev
, addr
);
573 addr
->enabled
= enabled
;
576 vlist_for_each_element(&ip
->route
, route
, node
) {
577 bool _enabled
= enabled
;
579 if (!enable_route(ip
, route
))
582 if (route
->enabled
== _enabled
)
586 if (!(route
->flags
& DEVROUTE_METRIC
))
587 route
->metric
= ip
->iface
->metric
;
589 system_add_route(dev
, route
);
591 system_del_route(dev
, route
);
592 route
->enabled
= _enabled
;
597 interface_ip_update_start(struct interface_ip_settings
*ip
)
599 if (ip
!= &ip
->iface
->config_ip
) {
600 vlist_simple_update(&ip
->dns_servers
);
601 vlist_simple_update(&ip
->dns_search
);
603 vlist_update(&ip
->route
);
604 vlist_update(&ip
->addr
);
608 interface_ip_update_complete(struct interface_ip_settings
*ip
)
610 vlist_simple_flush(&ip
->dns_servers
);
611 vlist_simple_flush(&ip
->dns_search
);
612 vlist_flush(&ip
->route
);
613 vlist_flush(&ip
->addr
);
617 interface_ip_flush(struct interface_ip_settings
*ip
)
619 if (ip
== &ip
->iface
->proto_ip
)
620 vlist_flush_all(&ip
->iface
->host_routes
);
621 vlist_simple_flush_all(&ip
->dns_servers
);
622 vlist_simple_flush_all(&ip
->dns_search
);
623 vlist_flush_all(&ip
->route
);
624 vlist_flush_all(&ip
->addr
);
628 __interface_ip_init(struct interface_ip_settings
*ip
, struct interface
*iface
)
632 vlist_simple_init(&ip
->dns_search
, struct dns_search_domain
, node
);
633 vlist_simple_init(&ip
->dns_servers
, struct dns_server
, node
);
634 vlist_init(&ip
->route
, route_cmp
, interface_update_proto_route
);
635 vlist_init(&ip
->addr
, addr_cmp
, interface_update_proto_addr
);
639 interface_ip_init(struct interface
*iface
)
641 __interface_ip_init(&iface
->proto_ip
, iface
);
642 __interface_ip_init(&iface
->config_ip
, iface
);
643 vlist_init(&iface
->host_routes
, route_cmp
, interface_update_host_route
);