config.c

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