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;
38 static const struct blobmsg_policy proto_ip_attributes[__OPT_MAX] = {
39 [OPT_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_ARRAY },
40 [OPT_IP6ADDR] = { .name = "ip6addr", .type = BLOBMSG_TYPE_ARRAY },
41 [OPT_NETMASK] = { .name = "netmask", .type = BLOBMSG_TYPE_STRING },
42 [OPT_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
43 [OPT_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
44 [OPT_IP6GW] = { .name = "ip6gw", .type = BLOBMSG_TYPE_STRING },
47 static const union config_param_info proto_ip_attr_info[__OPT_MAX] = {
48 [OPT_IPADDR] = { .type = BLOBMSG_TYPE_STRING },
49 [OPT_IP6ADDR] = { .type = BLOBMSG_TYPE_STRING },
52 const struct config_param_list proto_ip_attr = {
53 .n_params = __OPT_MAX,
54 .params = proto_ip_attributes,
55 .info = proto_ip_attr_info,
66 static const struct blobmsg_policy proto_ip_addr[__ADDR_MAX] = {
67 [ADDR_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_STRING },
68 [ADDR_MASK] = { .name = "mask", .type = BLOBMSG_TYPE_STRING },
69 [ADDR_BROADCAST] = { .name = "broadcast", .type = BLOBMSG_TYPE_STRING },
70 [ADDR_PTP] = { .name = "ptp", .type = BLOBMSG_TYPE_STRING },
74 parse_netmask_string(const char *str, bool v6)
80 if (!strchr(str, '.')) {
81 ret = strtoul(str, &err, 0);
91 if (inet_aton(str, &addr) != 1)
94 return 32 - fls(~(ntohl(addr.s_addr)));
101 split_netmask(char *str, unsigned int *netmask, bool v6)
103 char *delim = strchr(str, '/');
108 *netmask = parse_netmask_string(delim, v6);
114 parse_ip_and_netmask(int af, const char *str, void *addr, unsigned int *netmask)
116 char *astr = alloca(strlen(str) + 1);
119 if (!split_netmask(astr, netmask, af == AF_INET6))
122 if (af == AF_INET6) {
130 return inet_pton(af, astr, addr);
133 static struct device_addr *
134 alloc_device_addr(bool v6, bool ext)
136 struct device_addr *addr;
138 addr = calloc(1, sizeof(*addr));
139 addr->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
141 addr->flags |= DEVADDR_EXTERNAL;
147 parse_addr(struct interface *iface, const char *str, bool v6, int mask,
148 bool ext, uint32_t broadcast)
150 struct device_addr *addr;
151 int af = v6 ? AF_INET6 : AF_INET;
153 addr = alloc_device_addr(v6, ext);
158 if (!parse_ip_and_netmask(af, str, &addr->addr, &addr->mask)) {
159 interface_add_error(iface, "proto", "INVALID_ADDRESS", &str, 1);
165 addr->broadcast = broadcast;
167 vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
172 parse_static_address_option(struct interface *iface, struct blob_attr *attr,
173 bool v6, int netmask, bool ext, uint32_t broadcast)
175 struct blob_attr *cur;
179 blobmsg_for_each_attr(cur, attr, rem) {
180 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
184 if (!parse_addr(iface, blobmsg_data(cur), v6, netmask, ext,
192 static struct device_addr *
193 parse_address_item(struct blob_attr *attr, bool v6, bool ext)
195 struct device_addr *addr;
196 struct blob_attr *tb[__ADDR_MAX];
197 struct blob_attr *cur;
199 if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
202 addr = alloc_device_addr(v6, ext);
206 blobmsg_parse(proto_ip_addr, __ADDR_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
208 addr->mask = v6 ? 128 : 32;
209 if ((cur = tb[ADDR_MASK])) {
210 unsigned int new_mask;
212 new_mask = parse_netmask_string(blobmsg_data(cur), v6);
213 if (new_mask > addr->mask)
216 addr->mask = new_mask;
219 cur = tb[ADDR_IPADDR];
223 if (!inet_pton(v6 ? AF_INET6 : AF_INET, blobmsg_data(cur), &addr->addr))
227 if ((cur = tb[ADDR_BROADCAST]) &&
228 !inet_pton(AF_INET, blobmsg_data(cur), &addr->broadcast))
230 if ((cur = tb[ADDR_PTP]) &&
231 !inet_pton(AF_INET, blobmsg_data(cur), &addr->point_to_point))
243 parse_address_list(struct interface *iface, struct blob_attr *attr, bool v6,
246 struct device_addr *addr;
247 struct blob_attr *cur;
251 blobmsg_for_each_attr(cur, attr, rem) {
252 addr = parse_address_item(cur, v6, ext);
257 vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
264 parse_gateway_option(struct interface *iface, struct blob_attr *attr, bool v6)
266 struct device_route *route;
267 const char *str = blobmsg_data(attr);
268 int af = v6 ? AF_INET6 : AF_INET;
270 route = calloc(1, sizeof(*route));
271 if (!inet_pton(af, str, &route->nexthop)) {
272 interface_add_error(iface, "proto", "INVALID_GATEWAY", &str, 1);
278 route->flags = (v6 ? DEVADDR_INET6 : DEVADDR_INET4);
279 vlist_add(&iface->proto_ip.route, &route->node, &route->flags);
285 proto_apply_static_ip_settings(struct interface *iface, struct blob_attr *attr)
287 struct blob_attr *tb[__OPT_MAX];
288 struct blob_attr *cur;
290 unsigned int netmask = 32;
291 int n_v4 = 0, n_v6 = 0;
292 struct in_addr bcast = {};
294 blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
296 if ((cur = tb[OPT_NETMASK])) {
297 netmask = parse_netmask_string(blobmsg_data(cur), false);
299 error = "INVALID_NETMASK";
304 if ((cur = tb[OPT_BROADCAST])) {
305 if (!inet_pton(AF_INET, blobmsg_data(cur), &bcast)) {
306 error = "INVALID_BROADCAST";
311 if ((cur = tb[OPT_IPADDR]))
312 n_v4 = parse_static_address_option(iface, cur, false,
313 netmask, false, bcast.s_addr);
315 if ((cur = tb[OPT_IP6ADDR]))
316 n_v6 = parse_static_address_option(iface, cur, true,
319 if (!n_v4 && !n_v6) {
320 error = "NO_ADDRESS";
324 if (n_v4 < 0 || n_v6 < 0)
327 if ((cur = tb[OPT_GATEWAY])) {
328 if (n_v4 && !parse_gateway_option(iface, cur, false))
332 if ((cur = tb[OPT_IP6GW])) {
333 if (n_v6 && !parse_gateway_option(iface, cur, true))
340 interface_add_error(iface, "proto", error, NULL, 0);
346 proto_apply_ip_settings(struct interface *iface, struct blob_attr *attr, bool ext)
348 struct blob_attr *tb[__OPT_MAX];
349 struct blob_attr *cur;
351 int n_v4 = 0, n_v6 = 0;
353 blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
355 if ((cur = tb[OPT_IPADDR]))
356 n_v4 = parse_address_list(iface, cur, false, ext);
358 if ((cur = tb[OPT_IP6ADDR]))
359 n_v6 = parse_address_list(iface, cur, true, ext);
361 if (!n_v4 && !n_v6) {
362 error = "NO_ADDRESS";
366 if (n_v4 < 0 || n_v6 < 0)
369 if ((cur = tb[OPT_GATEWAY])) {
370 if (n_v4 && !parse_gateway_option(iface, cur, false))
374 if ((cur = tb[OPT_IP6GW])) {
375 if (n_v6 && !parse_gateway_option(iface, cur, true))
382 interface_add_error(iface, "proto", error, NULL, 0);
387 void add_proto_handler(struct proto_handler *p)
390 avl_init(&handlers, avl_strcmp, false, NULL);
395 p->avl.key = p->name;
396 avl_insert(&handlers, &p->avl);
400 default_proto_free(struct interface_proto_state *proto)
406 invalid_proto_handler(struct interface_proto_state *proto,
407 enum interface_proto_cmd cmd, bool force)
413 no_proto_handler(struct interface_proto_state *proto,
414 enum interface_proto_cmd cmd, bool force)
419 static struct interface_proto_state *
420 default_proto_attach(const struct proto_handler *h,
421 struct interface *iface, struct blob_attr *attr)
423 struct interface_proto_state *proto;
425 proto = calloc(1, sizeof(*proto));
426 proto->free = default_proto_free;
427 proto->cb = no_proto_handler;
432 static const struct proto_handler no_proto = {
434 .flags = PROTO_FLAG_IMMEDIATE,
435 .attach = default_proto_attach,
438 static const struct proto_handler *
439 get_proto_handler(const char *name)
441 struct proto_handler *proto;
443 if (!strcmp(name, "none"))
449 return avl_find_element(&handlers, name, proto, avl);
453 proto_init_interface(struct interface *iface, struct blob_attr *attr)
455 const struct proto_handler *proto = iface->proto_handler;
456 struct interface_proto_state *state = NULL;
461 state = proto->attach(proto, iface, attr);
463 state = no_proto.attach(&no_proto, iface, attr);
464 state->cb = invalid_proto_handler;
467 state->handler = proto;
468 interface_set_proto_state(iface, state);
472 proto_attach_interface(struct interface *iface, const char *proto_name)
474 const struct proto_handler *proto = &no_proto;
477 proto = get_proto_handler(proto_name);
479 interface_add_error(iface, "proto", "INVALID_PROTO", NULL, 0);
484 iface->proto_handler = proto;
488 interface_proto_event(struct interface_proto_state *proto,
489 enum interface_proto_cmd cmd, bool force)
491 enum interface_proto_event ev;
494 ret = proto->cb(proto, cmd, force);
495 if (ret || !(proto->handler->flags & PROTO_FLAG_IMMEDIATE))
499 case PROTO_CMD_SETUP:
502 case PROTO_CMD_TEARDOWN:
508 proto->proto_event(proto, ev);