1 /* 2 * netifd - network interface daemon 3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org> 4 * 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 8 * 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. 13 */ 14 #define _GNU_SOURCE 15 #include <string.h> 16 #include <stdlib.h> 17 #include <stdio.h> 18 19 #include <uci.h> 20 21 #include "netifd.h" 22 #include "interface.h" 23 #include "interface-ip.h" 24 #include "iprule.h" 25 #include "proto.h" 26 #include "wireless.h" 27 #include "config.h" 28 29 bool config_init = false; 30 31 static struct uci_context *uci_ctx; 32 static struct uci_package *uci_network; 33 static struct uci_package *uci_wireless; 34 static struct blob_buf b; 35 36 static int 37 config_section_idx(struct uci_section *s) 38 { 39 struct uci_element *e; 40 int idx = 0; 41 42 uci_foreach_element(&uci_wireless->sections, e) { 43 struct uci_section *cur = uci_to_section(e); 44 45 if (s == cur) 46 return idx; 47 48 if (!strcmp(cur->type, s->type)) 49 idx++; 50 } 51 52 return -1; 53 } 54 55 static int 56 config_parse_bridge_interface(struct uci_section *s, struct device_type *devtype) 57 { 58 char *name; 59 60 name = alloca(strlen(s->e.name) + strlen(devtype->name_prefix) + 2); 61 sprintf(name, "%s-%s", devtype->name_prefix, s->e.name); 62 blobmsg_add_string(&b, "name", name); 63 64 uci_to_blob(&b, s, devtype->config_params); 65 if (!device_create(name, devtype, b.head)) { 66 D(INTERFACE, "Failed to create '%s' device for interface '%s'\n", 67 devtype->name, s->e.name); 68 } 69 70 blob_buf_init(&b, 0); 71 blobmsg_add_string(&b, "ifname", name); 72 return 0; 73 } 74 75 static void 76 config_parse_interface(struct uci_section *s, bool alias) 77 { 78 struct interface *iface; 79 const char *type = NULL, *disabled; 80 struct blob_attr *config; 81 bool bridge = false; 82 struct device_type *devtype = NULL; 83 84 disabled = uci_lookup_option_string(uci_ctx, s, "disabled"); 85 if (disabled && !strcmp(disabled, "1")) 86 return; 87 88 blob_buf_init(&b, 0); 89 90 if (!alias) 91 type = uci_lookup_option_string(uci_ctx, s, "type"); 92 93 if (type) 94 devtype = device_type_get(type); 95 96 if (devtype && devtype->bridge_capability) { 97 if (config_parse_bridge_interface(s, devtype)) 98 return; 99 100 bridge = true; 101 } 102 103 uci_to_blob(&b, s, &interface_attr_list); 104 105 iface = interface_alloc(s->e.name, b.head, false); 106 if (!iface) 107 return; 108 109 if (iface->proto_handler && iface->proto_handler->config_params) 110 uci_to_blob(&b, s, iface->proto_handler->config_params); 111 112 if (!bridge && uci_to_blob(&b, s, simple_device_type.config_params)) 113 iface->device_config = true; 114 115 config = blob_memdup(b.head); 116 if (!config) 117 goto error; 118 119 if (alias) { 120 if (!interface_add_alias(iface, config)) 121 goto error_free_config; 122 } else { 123 if (!interface_add(iface, config)) 124 goto error_free_config; 125 } 126 return; 127 128 error_free_config: 129 free(config); 130 error: 131 free(iface); 132 } 133 134 static void 135 config_parse_route(struct uci_section *s, bool v6) 136 { 137 void *route; 138 139 blob_buf_init(&b, 0); 140 route = blobmsg_open_array(&b, "route"); 141 uci_to_blob(&b, s, &route_attr_list); 142 blobmsg_close_array(&b, route); 143 interface_ip_add_route(NULL, blob_data(b.head), v6); 144 } 145 146 static void 147 config_parse_neighbor(struct uci_section *s, bool v6) 148 { 149 void *neighbor; 150 blob_buf_init(&b,0); 151 neighbor = blobmsg_open_array(&b, "neighbor"); 152 uci_to_blob(&b,s, &neighbor_attr_list); 153 blobmsg_close_array(&b, neighbor); 154 interface_ip_add_neighbor(NULL, blob_data(b.head), v6); 155 } 156 157 static void 158 config_parse_rule(struct uci_section *s, bool v6) 159 { 160 void *rule; 161 162 blob_buf_init(&b, 0); 163 rule = blobmsg_open_array(&b, "rule"); 164 uci_to_blob(&b, s, &rule_attr_list); 165 blobmsg_close_array(&b, rule); 166 iprule_add(blob_data(b.head), v6); 167 } 168 169 static void 170 config_init_devices(void) 171 { 172 struct uci_element *e; 173 174 uci_foreach_element(&uci_network->sections, e) { 175 const struct uci_blob_param_list *params = NULL; 176 struct uci_section *s = uci_to_section(e); 177 struct device_type *devtype = NULL; 178 struct device *dev; 179 const char *type, *name; 180 181 if (strcmp(s->type, "device") != 0) 182 continue; 183 184 name = uci_lookup_option_string(uci_ctx, s, "name"); 185 if (!name) 186 continue; 187 188 type = uci_lookup_option_string(uci_ctx, s, "type"); 189 if (type) 190 devtype = device_type_get(type); 191 192 if (devtype) 193 params = devtype->config_params; 194 if (!params) 195 params = simple_device_type.config_params; 196 197 blob_buf_init(&b, 0); 198 uci_to_blob(&b, s, params); 199 if (devtype) { 200 dev = device_create(name, devtype, b.head); 201 if (!dev) 202 continue; 203 } else { 204 dev = device_get(name, 1); 205 if (!dev) 206 continue; 207 208 dev->current_config = true; 209 device_apply_config(dev, dev->type, b.head); 210 } 211 dev->default_config = false; 212 } 213 } 214 215 static struct uci_package * 216 config_init_package(const char *config) 217 { 218 struct uci_context *ctx = uci_ctx; 219 struct uci_package *p = NULL; 220 221 if (!ctx) { 222 ctx = uci_alloc_context(); 223 uci_ctx = ctx; 224 225 ctx->flags &= ~UCI_FLAG_STRICT; 226 if (config_path) 227 uci_set_confdir(ctx, config_path); 228 229 #ifdef DUMMY_MODE 230 uci_set_savedir(ctx, "./tmp"); 231 #endif 232 } else { 233 p = uci_lookup_package(ctx, config); 234 if (p) 235 uci_unload(ctx, p); 236 } 237 238 if (uci_load(ctx, config, &p)) 239 return NULL; 240 241 return p; 242 } 243 244 static void 245 config_init_interfaces(void) 246 { 247 struct uci_element *e; 248 249 uci_foreach_element(&uci_network->sections, e) { 250 struct uci_section *s = uci_to_section(e); 251 252 if (!strcmp(s->type, "interface")) 253 config_parse_interface(s, false); 254 } 255 256 uci_foreach_element(&uci_network->sections, e) { 257 struct uci_section *s = uci_to_section(e); 258 259 if (!strcmp(s->type, "alias")) 260 config_parse_interface(s, true); 261 } 262 } 263 264 static void 265 config_init_ip(void) 266 { 267 struct interface *iface; 268 struct uci_element *e; 269 270 vlist_for_each_element(&interfaces, iface, node) 271 interface_ip_update_start(&iface->config_ip); 272 273 uci_foreach_element(&uci_network->sections, e) { 274 struct uci_section *s = uci_to_section(e); 275 276 if (!strcmp(s->type, "route")) 277 config_parse_route(s, false); 278 else if (!strcmp(s->type, "route6")) 279 config_parse_route(s, true); 280 if (!strcmp(s->type, "neighbor")) 281 config_parse_neighbor(s, false); 282 else if (!strcmp(s->type, "neighbor6")) 283 config_parse_neighbor(s, true); 284 } 285 286 vlist_for_each_element(&interfaces, iface, node) 287 interface_ip_update_complete(&iface->config_ip); 288 } 289 290 static void 291 config_init_rules(void) 292 { 293 struct uci_element *e; 294 295 iprule_update_start(); 296 297 uci_foreach_element(&uci_network->sections, e) { 298 struct uci_section *s = uci_to_section(e); 299 300 if (!strcmp(s->type, "rule")) 301 config_parse_rule(s, false); 302 else if (!strcmp(s->type, "rule6")) 303 config_parse_rule(s, true); 304 } 305 306 iprule_update_complete(); 307 } 308 309 static void 310 config_init_globals(void) 311 { 312 struct uci_section *globals = uci_lookup_section( 313 uci_ctx, uci_network, "globals"); 314 if (!globals) 315 return; 316 317 const char *ula_prefix = uci_lookup_option_string( 318 uci_ctx, globals, "ula_prefix"); 319 interface_ip_set_ula_prefix(ula_prefix); 320 } 321 322 static void 323 config_parse_wireless_device(struct uci_section *s) 324 { 325 struct wireless_driver *drv; 326 const char *driver_name; 327 328 driver_name = uci_lookup_option_string(uci_ctx, s, "type"); 329 if (!driver_name) 330 return; 331 332 drv = avl_find_element(&wireless_drivers, driver_name, drv, node); 333 if (!drv) 334 return; 335 336 blob_buf_init(&b, 0); 337 uci_to_blob(&b, s, drv->device.config); 338 wireless_device_create(drv, s->e.name, b.head); 339 } 340 341 static void 342 config_parse_wireless_interface(struct wireless_device *wdev, struct uci_section *s) 343 { 344 char *name; 345 346 name = alloca(strlen(s->type) + 16); 347 sprintf(name, "@%s[%d]", s->type, config_section_idx(s)); 348 349 blob_buf_init(&b, 0); 350 uci_to_blob(&b, s, wdev->drv->interface.config); 351 wireless_interface_create(wdev, b.head, s->anonymous ? name : s->e.name); 352 } 353 354 static void 355 config_init_wireless(void) 356 { 357 struct wireless_device *wdev; 358 struct uci_element *e; 359 const char *dev_name; 360 361 if (!uci_wireless) { 362 DPRINTF("No wireless configuration found\n"); 363 return; 364 } 365 366 vlist_update(&wireless_devices); 367 368 uci_foreach_element(&uci_wireless->sections, e) { 369 struct uci_section *s = uci_to_section(e); 370 if (strcmp(s->type, "wifi-device") != 0) 371 continue; 372 373 config_parse_wireless_device(s); 374 } 375 376 vlist_flush(&wireless_devices); 377 378 vlist_for_each_element(&wireless_devices, wdev, node) { 379 wdev->vif_idx = 0; 380 vlist_update(&wdev->interfaces); 381 } 382 383 uci_foreach_element(&uci_wireless->sections, e) { 384 struct uci_section *s = uci_to_section(e); 385 386 if (strcmp(s->type, "wifi-iface") != 0) 387 continue; 388 389 dev_name = uci_lookup_option_string(uci_ctx, s, "device"); 390 if (!dev_name) 391 continue; 392 393 wdev = vlist_find(&wireless_devices, dev_name, wdev, node); 394 if (!wdev) { 395 DPRINTF("device %s not found!\n", dev_name); 396 continue; 397 } 398 399 config_parse_wireless_interface(wdev, s); 400 } 401 402 vlist_for_each_element(&wireless_devices, wdev, node) 403 vlist_flush(&wdev->interfaces); 404 } 405 406 int 407 config_init_all(void) 408 { 409 int ret = 0; 410 char *err; 411 412 uci_network = config_init_package("network"); 413 if (!uci_network) { 414 uci_get_errorstr(uci_ctx, &err, NULL); 415 netifd_log_message(L_CRIT, "Failed to load network config (%s)\n", err); 416 free(err); 417 return -1; 418 } 419 420 uci_wireless = config_init_package("wireless"); 421 if (!uci_wireless && uci_ctx->err != UCI_ERR_NOTFOUND) { 422 uci_get_errorstr(uci_ctx, &err, NULL); 423 netifd_log_message(L_CRIT, "Failed to load wireless config (%s)\n", err); 424 free(err); 425 ret = -1; 426 } 427 428 vlist_update(&interfaces); 429 config_init = true; 430 device_lock(); 431 432 device_reset_config(); 433 config_init_devices(); 434 config_init_interfaces(); 435 config_init_ip(); 436 config_init_rules(); 437 config_init_globals(); 438 config_init_wireless(); 439 440 config_init = false; 441 device_unlock(); 442 443 device_reset_old(); 444 device_init_pending(); 445 vlist_flush(&interfaces); 446 device_free_unused(NULL); 447 interface_refresh_assignments(false); 448 interface_start_pending(); 449 wireless_start_pending(); 450 451 return ret; 452 } 453
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