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.
18 #include <arpa/inet.h>
19 #include <netinet/in.h>
22 #include "interface.h"
23 #include "interface-ip.h"
26 static struct avl_tree handlers;
40 static const struct blobmsg_policy proto_ip_attributes[__OPT_MAX] = {
41 [OPT_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_ARRAY },
42 [OPT_IP6ADDR] = { .name = "ip6addr", .type = BLOBMSG_TYPE_ARRAY },
43 [OPT_NETMASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING },
44 [OPT_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
45 [OPT_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
46 [OPT_IP6GW] = { .name = "ip6gw", .type = BLOBMSG_TYPE_STRING },
47 [OPT_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
48 [OPT_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
51 static const union config_param_info proto_ip_attr_info[__OPT_MAX] = {
52 [OPT_IPADDR] = { .type = BLOBMSG_TYPE_STRING },
53 [OPT_IP6ADDR] = { .type = BLOBMSG_TYPE_STRING },
54 [OPT_DNS] = { .type = BLOBMSG_TYPE_STRING },
57 const struct config_param_list proto_ip_attr = {
58 .n_params = __OPT_MAX,
59 .params = proto_ip_attributes,
60 .info = proto_ip_attr_info,
71 static const struct blobmsg_policy proto_ip_addr[__ADDR_MAX] = {
72 [ADDR_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_STRING },
73 [ADDR_MASK] = { .name = "mask", .type = BLOBMSG_TYPE_STRING },
74 [ADDR_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
75 [ADDR_PTP] = { .name = "ptp", .type = BLOBMSG_TYPE_STRING },
79 parse_netmask_string(const char *str, bool v6)
85 if (!strchr(str, '.')) {
86 ret = strtoul(str, &err, 0);
96 if (inet_aton(str, &addr) != 1)
99 return 32 - fls(~(ntohl(addr.s_addr)));
106 split_netmask(char *str, unsigned int *netmask, bool v6)
108 char *delim = strchr(str, '/');
113 *netmask = parse_netmask_string(delim, v6);
119 parse_ip_and_netmask(int af, const char *str, void *addr, unsigned int *netmask)
121 char *astr = alloca(strlen(str) + 1);
124 if (!split_netmask(astr, netmask, af == AF_INET6))
127 if (af == AF_INET6) {
135 return inet_pton(af, astr, addr);
138 static struct device_addr *
139 alloc_device_addr(bool v6, bool ext)
141 struct device_addr *addr;
143 addr = calloc(1, sizeof(*addr));
144 addr->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
146 addr->flags |= DEVADDR_EXTERNAL;
152 parse_addr(struct interface *iface, const char *str, bool v6, int mask,
153 bool ext, uint32_t broadcast)
155 struct device_addr *addr;
156 int af = v6 ? AF_INET6 : AF_INET;
158 addr = alloc_device_addr(v6, ext);
163 if (!parse_ip_and_netmask(af, str, &addr->addr, &addr->mask)) {
164 interface_add_error(iface, "proto", "INVALID_ADDRESS", &str, 1);
170 addr->broadcast = broadcast;
172 vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
177 parse_static_address_option(struct interface *iface, struct blob_attr *attr,
178 bool v6, int netmask, bool ext, uint32_t broadcast)
180 struct blob_attr *cur;
184 blobmsg_for_each_attr(cur, attr, rem) {
185 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
189 if (!parse_addr(iface, blobmsg_data(cur), v6, netmask, ext,
197 static struct device_addr *
198 parse_address_item(struct blob_attr *attr, bool v6, bool ext)
200 struct device_addr *addr;
201 struct blob_attr *tb[__ADDR_MAX];
202 struct blob_attr *cur;
204 if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
207 addr = alloc_device_addr(v6, ext);
211 blobmsg_parse(proto_ip_addr, __ADDR_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
213 addr->mask = v6 ? 128 : 32;
214 if ((cur = tb[ADDR_MASK])) {
215 unsigned int new_mask;
217 new_mask = parse_netmask_string(blobmsg_data(cur), v6);
218 if (new_mask > addr->mask)
221 addr->mask = new_mask;
224 cur = tb[ADDR_IPADDR];
228 if (!inet_pton(v6 ? AF_INET6 : AF_INET, blobmsg_data(cur), &addr->addr))
232 if ((cur = tb[ADDR_BROADCAST]) &&
233 !inet_pton(AF_INET, blobmsg_data(cur), &addr->broadcast))
235 if ((cur = tb[ADDR_PTP]) &&
236 !inet_pton(AF_INET, blobmsg_data(cur), &addr->point_to_point))
248 parse_address_list(struct interface *iface, struct blob_attr *attr, bool v6,
251 struct device_addr *addr;
252 struct blob_attr *cur;
256 blobmsg_for_each_attr(cur, attr, rem) {
257 addr = parse_address_item(cur, v6, ext);
262 vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
269 parse_gateway_option(struct interface *iface, struct blob_attr *attr, bool v6)
271 struct device_route *route;
272 const char *str = blobmsg_data(attr);
273 int af = v6 ? AF_INET6 : AF_INET;
275 route = calloc(1, sizeof(*route));
276 if (!inet_pton(af, str, &route->nexthop)) {
277 interface_add_error(iface, "proto", "INVALID_GATEWAY", &str, 1);
283 route->flags = (v6 ? DEVADDR_INET6 : DEVADDR_INET4);
284 vlist_add(&iface->proto_ip.route, &route->node, &route->flags);
290 proto_apply_static_ip_settings(struct interface *iface, struct blob_attr *attr)
292 struct blob_attr *tb[__OPT_MAX];
293 struct blob_attr *cur;
295 unsigned int netmask = 32;
296 int n_v4 = 0, n_v6 = 0;
297 struct in_addr bcast = {};
299 blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
301 if ((cur = tb[OPT_NETMASK])) {
302 netmask = parse_netmask_string(blobmsg_data(cur), false);
304 error = "INVALID_NETMASK";
309 if ((cur = tb[OPT_BROADCAST])) {
310 if (!inet_pton(AF_INET, blobmsg_data(cur), &bcast)) {
311 error = "INVALID_BROADCAST";
316 if ((cur = tb[OPT_IPADDR]))
317 n_v4 = parse_static_address_option(iface, cur, false,
318 netmask, false, bcast.s_addr);
320 if ((cur = tb[OPT_IP6ADDR]))
321 n_v6 = parse_static_address_option(iface, cur, true,
324 if (!n_v4 && !n_v6) {
325 error = "NO_ADDRESS";
329 if (n_v4 < 0 || n_v6 < 0)
332 if ((cur = tb[OPT_GATEWAY])) {
333 if (n_v4 && !parse_gateway_option(iface, cur, false))
337 if ((cur = tb[OPT_IP6GW])) {
338 if (n_v6 && !parse_gateway_option(iface, cur, true))
342 if ((cur = tb[OPT_DNS]))
343 interface_add_dns_server_list(&iface->proto_ip, cur);
345 if ((cur = tb[OPT_DNS_SEARCH]))
346 interface_add_dns_search_list(&iface->proto_ip, cur);
351 interface_add_error(iface, "proto", error, NULL, 0);
357 proto_apply_ip_settings(struct interface *iface, struct blob_attr *attr, bool ext)
359 struct blob_attr *tb[__OPT_MAX];
360 struct blob_attr *cur;
362 int n_v4 = 0, n_v6 = 0;
364 blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
366 if ((cur = tb[OPT_IPADDR]))
367 n_v4 = parse_address_list(iface, cur, false, ext);
369 if ((cur = tb[OPT_IP6ADDR]))
370 n_v6 = parse_address_list(iface, cur, true, ext);
372 if (!n_v4 && !n_v6) {
373 error = "NO_ADDRESS";
377 if (n_v4 < 0 || n_v6 < 0)
380 if ((cur = tb[OPT_GATEWAY])) {
381 if (n_v4 && !parse_gateway_option(iface, cur, false))
385 if ((cur = tb[OPT_IP6GW])) {
386 if (n_v6 && !parse_gateway_option(iface, cur, true))
390 if ((cur = tb[OPT_DNS]))
391 interface_add_dns_server_list(&iface->proto_ip, cur);
393 if ((cur = tb[OPT_DNS_SEARCH]))
394 interface_add_dns_search_list(&iface->proto_ip, cur);
399 interface_add_error(iface, "proto", error, NULL, 0);
404 void add_proto_handler(struct proto_handler *p)
407 avl_init(&handlers, avl_strcmp, false, NULL);
412 p->avl.key = p->name;
413 avl_insert(&handlers, &p->avl);
417 default_proto_free(struct interface_proto_state *proto)
423 invalid_proto_handler(struct interface_proto_state *proto,
424 enum interface_proto_cmd cmd, bool force)
430 no_proto_handler(struct interface_proto_state *proto,
431 enum interface_proto_cmd cmd, bool force)
436 static struct interface_proto_state *
437 default_proto_attach(const struct proto_handler *h,
438 struct interface *iface, struct blob_attr *attr)
440 struct interface_proto_state *proto;
442 proto = calloc(1, sizeof(*proto));
443 proto->free = default_proto_free;
444 proto->cb = no_proto_handler;
449 static const struct proto_handler no_proto = {
451 .flags = PROTO_FLAG_IMMEDIATE,
452 .attach = default_proto_attach,
455 static const struct proto_handler *
456 get_proto_handler(const char *name)
458 struct proto_handler *proto;
460 if (!strcmp(name, "none"))
466 return avl_find_element(&handlers, name, proto, avl);
470 proto_init_interface(struct interface *iface, struct blob_attr *attr)
472 const struct proto_handler *proto = iface->proto_handler;
473 struct interface_proto_state *state = NULL;
478 state = proto->attach(proto, iface, attr);
480 state = no_proto.attach(&no_proto, iface, attr);
481 state->cb = invalid_proto_handler;
484 state->handler = proto;
485 interface_set_proto_state(iface, state);
489 proto_attach_interface(struct interface *iface, const char *proto_name)
491 const struct proto_handler *proto = &no_proto;
494 proto = get_proto_handler(proto_name);
496 interface_add_error(iface, "proto", "INVALID_PROTO", NULL, 0);
501 iface->proto_handler = proto;
505 interface_proto_event(struct interface_proto_state *proto,
506 enum interface_proto_cmd cmd, bool force)
508 enum interface_proto_event ev;
511 ret = proto->cb(proto, cmd, force);
512 if (ret || !(proto->handler->flags & PROTO_FLAG_IMMEDIATE))
516 case PROTO_CMD_SETUP:
519 case PROTO_CMD_TEARDOWN:
525 proto->proto_event(proto, ev);