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 },
73 static struct device_addr *
74 alloc_device_addr(bool v6, bool ext)
76 struct device_addr *addr;
78 addr = calloc(1, sizeof(*addr));
79 addr->flags = v6 ? DEVADDR_INET6 : DEVADDR_INET4;
81 addr->flags |= DEVADDR_EXTERNAL;
87 parse_addr(struct interface *iface, const char *str, bool v6, int mask,
88 bool ext, uint32_t broadcast)
90 struct device_addr *addr;
91 int af = v6 ? AF_INET6 : AF_INET;
93 addr = alloc_device_addr(v6, ext);
98 if (!parse_ip_and_netmask(af, str, &addr->addr, &addr->mask)) {
99 interface_add_error(iface, "proto", "INVALID_ADDRESS", &str, 1);
105 addr->broadcast = broadcast;
107 vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
112 parse_static_address_option(struct interface *iface, struct blob_attr *attr,
113 bool v6, int netmask, bool ext, uint32_t broadcast)
115 struct blob_attr *cur;
119 blobmsg_for_each_attr(cur, attr, rem) {
120 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
124 if (!parse_addr(iface, blobmsg_data(cur), v6, netmask, ext,
132 static struct device_addr *
133 parse_address_item(struct blob_attr *attr, bool v6, bool ext)
135 struct device_addr *addr;
136 struct blob_attr *tb[__ADDR_MAX];
137 struct blob_attr *cur;
139 if (blobmsg_type(attr) != BLOBMSG_TYPE_TABLE)
142 addr = alloc_device_addr(v6, ext);
146 blobmsg_parse(proto_ip_addr, __ADDR_MAX, tb, blobmsg_data(attr), blobmsg_data_len(attr));
148 addr->mask = v6 ? 128 : 32;
149 if ((cur = tb[ADDR_MASK])) {
150 unsigned int new_mask;
152 new_mask = parse_netmask_string(blobmsg_data(cur), v6);
153 if (new_mask > addr->mask)
156 addr->mask = new_mask;
159 cur = tb[ADDR_IPADDR];
163 if (!inet_pton(v6 ? AF_INET6 : AF_INET, blobmsg_data(cur), &addr->addr))
167 if ((cur = tb[ADDR_BROADCAST]) &&
168 !inet_pton(AF_INET, blobmsg_data(cur), &addr->broadcast))
170 if ((cur = tb[ADDR_PTP]) &&
171 !inet_pton(AF_INET, blobmsg_data(cur), &addr->point_to_point))
183 parse_address_list(struct interface *iface, struct blob_attr *attr, bool v6,
186 struct device_addr *addr;
187 struct blob_attr *cur;
191 blobmsg_for_each_attr(cur, attr, rem) {
192 addr = parse_address_item(cur, v6, ext);
197 vlist_add(&iface->proto_ip.addr, &addr->node, &addr->flags);
204 parse_gateway_option(struct interface *iface, struct blob_attr *attr, bool v6)
206 struct device_route *route;
207 const char *str = blobmsg_data(attr);
208 int af = v6 ? AF_INET6 : AF_INET;
210 route = calloc(1, sizeof(*route));
211 if (!inet_pton(af, str, &route->nexthop)) {
212 interface_add_error(iface, "proto", "INVALID_GATEWAY", &str, 1);
218 route->flags = (v6 ? DEVADDR_INET6 : DEVADDR_INET4);
219 vlist_add(&iface->proto_ip.route, &route->node, &route->flags);
225 proto_apply_static_ip_settings(struct interface *iface, struct blob_attr *attr)
227 struct blob_attr *tb[__OPT_MAX];
228 struct blob_attr *cur;
230 unsigned int netmask = 32;
231 int n_v4 = 0, n_v6 = 0;
232 struct in_addr bcast = {};
234 blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
236 if ((cur = tb[OPT_NETMASK])) {
237 netmask = parse_netmask_string(blobmsg_data(cur), false);
239 error = "INVALID_NETMASK";
244 if ((cur = tb[OPT_BROADCAST])) {
245 if (!inet_pton(AF_INET, blobmsg_data(cur), &bcast)) {
246 error = "INVALID_BROADCAST";
251 if ((cur = tb[OPT_IPADDR]))
252 n_v4 = parse_static_address_option(iface, cur, false,
253 netmask, false, bcast.s_addr);
255 if ((cur = tb[OPT_IP6ADDR]))
256 n_v6 = parse_static_address_option(iface, cur, true,
259 if (!n_v4 && !n_v6) {
260 error = "NO_ADDRESS";
264 if (n_v4 < 0 || n_v6 < 0)
267 if ((cur = tb[OPT_GATEWAY])) {
268 if (n_v4 && !parse_gateway_option(iface, cur, false))
272 if ((cur = tb[OPT_IP6GW])) {
273 if (n_v6 && !parse_gateway_option(iface, cur, true))
280 interface_add_error(iface, "proto", error, NULL, 0);
286 proto_apply_ip_settings(struct interface *iface, struct blob_attr *attr, bool ext)
288 struct blob_attr *tb[__OPT_MAX];
289 struct blob_attr *cur;
291 int n_v4 = 0, n_v6 = 0;
293 blobmsg_parse(proto_ip_attributes, __OPT_MAX, tb, blob_data(attr), blob_len(attr));
295 if ((cur = tb[OPT_IPADDR]))
296 n_v4 = parse_address_list(iface, cur, false, ext);
298 if ((cur = tb[OPT_IP6ADDR]))
299 n_v6 = parse_address_list(iface, cur, true, ext);
301 if (!n_v4 && !n_v6) {
302 error = "NO_ADDRESS";
306 if (n_v4 < 0 || n_v6 < 0)
309 if ((cur = tb[OPT_GATEWAY])) {
310 if (n_v4 && !parse_gateway_option(iface, cur, false))
314 if ((cur = tb[OPT_IP6GW])) {
315 if (n_v6 && !parse_gateway_option(iface, cur, true))
322 interface_add_error(iface, "proto", error, NULL, 0);
327 void add_proto_handler(struct proto_handler *p)
330 avl_init(&handlers, avl_strcmp, false, NULL);
335 p->avl.key = p->name;
336 avl_insert(&handlers, &p->avl);
340 default_proto_free(struct interface_proto_state *proto)
346 invalid_proto_handler(struct interface_proto_state *proto,
347 enum interface_proto_cmd cmd, bool force)
353 no_proto_handler(struct interface_proto_state *proto,
354 enum interface_proto_cmd cmd, bool force)
359 static struct interface_proto_state *
360 default_proto_attach(const struct proto_handler *h,
361 struct interface *iface, struct blob_attr *attr)
363 struct interface_proto_state *proto;
365 proto = calloc(1, sizeof(*proto));
366 proto->free = default_proto_free;
367 proto->cb = no_proto_handler;
372 static const struct proto_handler no_proto = {
374 .flags = PROTO_FLAG_IMMEDIATE,
375 .attach = default_proto_attach,
378 static const struct proto_handler *
379 get_proto_handler(const char *name)
381 struct proto_handler *proto;
383 if (!strcmp(name, "none"))
389 return avl_find_element(&handlers, name, proto, avl);
393 proto_dump_handlers(struct blob_buf *b)
395 struct proto_handler *p;
398 avl_for_each_element(&handlers, p, avl) {
399 c = blobmsg_open_table(b, p->name);
400 blobmsg_add_u8(b, "no_device", !!(p->flags & PROTO_FLAG_NODEV));
401 blobmsg_close_table(b, c);
406 proto_init_interface(struct interface *iface, struct blob_attr *attr)
408 const struct proto_handler *proto = iface->proto_handler;
409 struct interface_proto_state *state = NULL;
414 state = proto->attach(proto, iface, attr);
416 state = no_proto.attach(&no_proto, iface, attr);
417 state->cb = invalid_proto_handler;
420 state->handler = proto;
421 interface_set_proto_state(iface, state);
425 proto_attach_interface(struct interface *iface, const char *proto_name)
427 const struct proto_handler *proto = &no_proto;
430 proto = get_proto_handler(proto_name);
432 interface_add_error(iface, "proto", "INVALID_PROTO", NULL, 0);
437 iface->proto_handler = proto;
441 interface_proto_event(struct interface_proto_state *proto,
442 enum interface_proto_cmd cmd, bool force)
444 enum interface_proto_event ev;
447 ret = proto->cb(proto, cmd, force);
448 if (ret || !(proto->handler->flags & PROTO_FLAG_IMMEDIATE))
452 case PROTO_CMD_SETUP:
455 case PROTO_CMD_TEARDOWN:
461 proto->proto_event(proto, ev);