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, *disabled;
  60         struct blob_attr *config;
  61         struct device *dev;
  62         bool bridge = false;
  63
  64         disabled = uci_lookup_option_string(uci_ctx, s, "disabled");
  65         if (disabled && !strcmp(disabled, "1"))
  66                 return;
  67
  68         blob_buf_init(&b, 0);
  69
  70         if (!alias)
  71                 type = uci_lookup_option_string(uci_ctx, s, "type");
  72         if (type && !strcmp(type, "bridge")) {
  73                 if (config_parse_bridge_interface(s))
  74                         return;
  75
  76                 bridge = true;
  77         }
  78
  79         uci_to_blob(&b, s, &interface_attr_list);
  80
  81         iface = interface_alloc(s->e.name, b.head);
  82         if (!iface)
  83                 return;
  84
  85         if (iface->proto_handler && iface->proto_handler->config_params)
  86                 uci_to_blob(&b, s, iface->proto_handler->config_params);
  87
  88         if (!bridge && uci_to_blob(&b, s, simple_device_type.config_params))
  89                 iface->device_config = true;
  90
  91         config = blob_memdup(b.head);
  92         if (!config)
  93                 goto error;
  94
  95         if (alias) {
  96                 if (!interface_add_alias(iface, config))
  97                         goto error_free_config;
  98         } else {
  99                 interface_add(iface, config);
 100         }
 101
 102         /*
 103          * need to look up the interface name again, in case of config update,
 104          * the pointer will have changed
 105          */
 106         iface = vlist_find(&interfaces, s->e.name, iface, node);
 107         if (!iface)
 108                 return;
 109
 110         dev = iface->main_dev.dev;
 111         if (!dev || !dev->default_config)
 112                 return;
 113
 114         blob_buf_init(&b, 0);
 115         uci_to_blob(&b, s, dev->type->config_params);
 116         if (blob_len(b.head) == 0)
 117                 return;
 118
 119         device_set_config(dev, dev->type, b.head);
 120         return;
 121 error_free_config:
 122         free(config);
 123 error:
 124         free(iface);
 125 }
 126
 127 static void
 128 config_parse_route(struct uci_section *s, bool v6)
 129 {
 130         void *route;
 131
 132         blob_buf_init(&b, 0);
 133         route = blobmsg_open_array(&b, "route");
 134         uci_to_blob(&b, s, &route_attr_list);
 135         blobmsg_close_array(&b, route);
 136         interface_ip_add_route(NULL, blob_data(b.head), v6);
 137 }
 138
 139 static void
 140 config_parse_rule(struct uci_section *s, bool v6)
 141 {
 142         void *rule;
 143
 144         blob_buf_init(&b, 0);
 145         rule = blobmsg_open_array(&b, "rule");
 146         uci_to_blob(&b, s, &rule_attr_list);
 147         blobmsg_close_array(&b, rule);
 148         iprule_add(blob_data(b.head), v6);
 149 }
 150
 151 static void
 152 config_init_devices(void)
 153 {
 154         struct uci_element *e;
 155
 156         uci_foreach_element(&uci_network->sections, e) {
 157                 struct uci_section *s = uci_to_section(e);
 158                 const struct device_type *devtype = NULL;
 159                 const char *type, *name;
 160
 161                 if (strcmp(s->type, "device") != 0)
 162                         continue;
 163
 164                 name = uci_lookup_option_string(uci_ctx, s, "name");
 165                 if (!name)
 166                         continue;
 167
 168                 type = uci_lookup_option_string(uci_ctx, s, "type");
 169                 if (type) {
 170                         if (!strcmp(type, "8021ad"))
 171                                 devtype = &vlandev_device_type;
 172                         else if (!strcmp(type, "8021q"))
 173                                 devtype = &vlandev_device_type;
 174                         else if (!strcmp(type, "bridge"))
 175                                 devtype = &bridge_device_type;
 176                         else if (!strcmp(type, "macvlan"))
 177                                 devtype = &macvlan_device_type;
 178                         else if (!strcmp(type, "tunnel"))
 179                                 devtype = &tunnel_device_type;
 180                 }
 181
 182                 if (!devtype)
 183                         devtype = &simple_device_type;
 184
 185                 blob_buf_init(&b, 0);
 186                 uci_to_blob(&b, s, devtype->config_params);
 187                 device_create(name, devtype, b.head);
 188         }
 189 }
 190
 191 static struct uci_package *
 192 config_init_package(const char *config)
 193 {
 194         struct uci_context *ctx = uci_ctx;
 195         struct uci_package *p = NULL;
 196
 197         if (!ctx) {
 198                 ctx = uci_alloc_context();
 199                 uci_ctx = ctx;
 200
 201                 ctx->flags &= ~UCI_FLAG_STRICT;
 202                 if (config_path)
 203                         uci_set_confdir(ctx, config_path);
 204
 205 #ifdef DUMMY_MODE
 206                 uci_set_savedir(ctx, "./tmp");
 207 #endif
 208         } else {
 209                 p = uci_lookup_package(ctx, config);
 210                 if (p)
 211                         uci_unload(ctx, p);
 212         }
 213
 214         if (uci_load(ctx, config, &p))
 215                 return NULL;
 216
 217         return p;
 218 }
 219
 220 static void
 221 config_init_interfaces(void)
 222 {
 223         struct uci_element *e;
 224
 225         uci_foreach_element(&uci_network->sections, e) {
 226                 struct uci_section *s = uci_to_section(e);
 227
 228                 if (!strcmp(s->type, "interface"))
 229                         config_parse_interface(s, false);
 230         }
 231
 232         uci_foreach_element(&uci_network->sections, e) {
 233                 struct uci_section *s = uci_to_section(e);
 234
 235                 if (!strcmp(s->type, "alias"))
 236                         config_parse_interface(s, true);
 237         }
 238 }
 239
 240 static void
 241 config_init_routes(void)
 242 {
 243         struct interface *iface;
 244         struct uci_element *e;
 245
 246         vlist_for_each_element(&interfaces, iface, node)
 247                 interface_ip_update_start(&iface->config_ip);
 248
 249         uci_foreach_element(&uci_network->sections, e) {
 250                 struct uci_section *s = uci_to_section(e);
 251
 252                 if (!strcmp(s->type, "route"))
 253                         config_parse_route(s, false);
 254                 else if (!strcmp(s->type, "route6"))
 255                         config_parse_route(s, true);
 256         }
 257
 258         vlist_for_each_element(&interfaces, iface, node)
 259                 interface_ip_update_complete(&iface->config_ip);
 260 }
 261
 262 static void
 263 config_init_rules(void)
 264 {
 265         struct uci_element *e;
 266
 267         iprule_update_start();
 268
 269         uci_foreach_element(&uci_network->sections, e) {
 270                 struct uci_section *s = uci_to_section(e);
 271
 272                 if (!strcmp(s->type, "rule"))
 273                         config_parse_rule(s, false);
 274                 else if (!strcmp(s->type, "rule6"))
 275                         config_parse_rule(s, true);
 276         }
 277
 278         iprule_update_complete();
 279 }
 280
 281 static void
 282 config_init_globals(void)
 283 {
 284         struct uci_section *globals = uci_lookup_section(
 285                         uci_ctx, uci_network, "globals");
 286         if (!globals)
 287                 return;
 288
 289         const char *ula_prefix = uci_lookup_option_string(
 290                         uci_ctx, globals, "ula_prefix");
 291         interface_ip_set_ula_prefix(ula_prefix);
 292 }
 293
 294 static void
 295 config_parse_wireless_device(struct uci_section *s)
 296 {
 297         struct wireless_driver *drv;
 298         const char *driver_name;
 299
 300         driver_name = uci_lookup_option_string(uci_ctx, s, "type");
 301         if (!driver_name)
 302                 return;
 303
 304         drv = avl_find_element(&wireless_drivers, driver_name, drv, node);
 305         if (!drv)
 306                 return;
 307
 308         blob_buf_init(&b, 0);
 309         uci_to_blob(&b, s, drv->device.config);
 310         wireless_device_create(drv, s->e.name, b.head);
 311 }
 312
 313 static void
 314 config_parse_wireless_interface(struct wireless_device *wdev, struct uci_section *s)
 315 {
 316         blob_buf_init(&b, 0);
 317         uci_to_blob(&b, s, wdev->drv->interface.config);
 318         wireless_interface_create(wdev, b.head, s->e.name);
 319 }
 320
 321 static void
 322 config_init_wireless(void)
 323 {
 324         struct wireless_device *wdev;
 325         struct uci_element *e;
 326         const char *dev_name;
 327
 328         if (!uci_wireless) {
 329                 DPRINTF("No wireless configuration found\n");
 330                 return;
 331         }
 332
 333         vlist_update(&wireless_devices);
 334
 335         uci_foreach_element(&uci_wireless->sections, e) {
 336                 struct uci_section *s = uci_to_section(e);
 337                 if (strcmp(s->type, "wifi-device") != 0)
 338                         continue;
 339
 340                 config_parse_wireless_device(s);
 341         }
 342
 343         vlist_flush(&wireless_devices);
 344
 345         vlist_for_each_element(&wireless_devices, wdev, node) {
 346                 wdev->vif_idx = 0;
 347                 vlist_update(&wdev->interfaces);
 348         }
 349
 350         uci_foreach_element(&uci_wireless->sections, e) {
 351                 struct uci_section *s = uci_to_section(e);
 352
 353                 if (strcmp(s->type, "wifi-iface") != 0)
 354                         continue;
 355
 356                 dev_name = uci_lookup_option_string(uci_ctx, s, "device");
 357                 if (!dev_name)
 358                         continue;
 359
 360                 wdev = vlist_find(&wireless_devices, dev_name, wdev, node);
 361                 if (!wdev) {
 362                         DPRINTF("device %s not found!\n", dev_name);
 363                         continue;
 364                 }
 365
 366                 config_parse_wireless_interface(wdev, s);
 367         }
 368
 369         vlist_for_each_element(&wireless_devices, wdev, node)
 370                 vlist_flush(&wdev->interfaces);
 371 }
 372
 373 void
 374 config_init_all(void)
 375 {
 376         uci_network = config_init_package("network");
 377         if (!uci_network) {
 378                 fprintf(stderr, "Failed to load network config\n");
 379                 return;
 380         }
 381
 382         uci_wireless = config_init_package("wireless");
 383
 384         vlist_update(&interfaces);
 385         config_init = true;
 386         device_lock();
 387
 388         device_reset_config();
 389         config_init_devices();
 390         config_init_interfaces();
 391         config_init_routes();
 392         config_init_rules();
 393         config_init_globals();
 394         config_init_wireless();
 395
 396         config_init = false;
 397         device_unlock();
 398
 399         device_reset_old();
 400         device_init_pending();
 401         vlist_flush(&interfaces);
 402         device_free_unused(NULL);
 403         interface_refresh_assignments(false);
 404         interface_start_pending();
 405         wireless_start_pending();
 406 }