henrike@webrtc.org | f7795df | 2014-05-13 18:00:26 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #ifdef HAVE_CONFIG_H |
| 12 | #include "config.h" |
| 13 | #endif |
| 14 | |
| 15 | #include "webrtc/base/network.h" |
| 16 | |
| 17 | #if defined(WEBRTC_POSIX) |
| 18 | // linux/if.h can't be included at the same time as the posix sys/if.h, and |
| 19 | // it's transitively required by linux/route.h, so include that version on |
| 20 | // linux instead of the standard posix one. |
| 21 | #if defined(WEBRTC_LINUX) |
| 22 | #include <linux/if.h> |
| 23 | #include <linux/route.h> |
| 24 | #elif !defined(__native_client__) |
| 25 | #include <net/if.h> |
| 26 | #endif |
| 27 | #include <sys/socket.h> |
| 28 | #include <sys/utsname.h> |
| 29 | #include <sys/ioctl.h> |
| 30 | #include <unistd.h> |
| 31 | #include <errno.h> |
| 32 | |
| 33 | #if defined(WEBRTC_ANDROID) |
| 34 | #include "webrtc/base/ifaddrs-android.h" |
| 35 | #elif !defined(__native_client__) |
| 36 | #include <ifaddrs.h> |
| 37 | #endif |
| 38 | |
| 39 | #endif // WEBRTC_POSIX |
| 40 | |
| 41 | #if defined(WEBRTC_WIN) |
| 42 | #include "webrtc/base/win32.h" |
| 43 | #include <Iphlpapi.h> |
| 44 | #endif |
| 45 | |
| 46 | #include <stdio.h> |
| 47 | |
| 48 | #include <algorithm> |
| 49 | |
| 50 | #include "webrtc/base/logging.h" |
| 51 | #include "webrtc/base/scoped_ptr.h" |
| 52 | #include "webrtc/base/socket.h" // includes something that makes windows happy |
| 53 | #include "webrtc/base/stream.h" |
| 54 | #include "webrtc/base/stringencode.h" |
| 55 | #include "webrtc/base/thread.h" |
| 56 | |
| 57 | namespace rtc { |
| 58 | namespace { |
| 59 | |
| 60 | const uint32 kUpdateNetworksMessage = 1; |
| 61 | const uint32 kSignalNetworksMessage = 2; |
| 62 | |
| 63 | // Fetch list of networks every two seconds. |
| 64 | const int kNetworksUpdateIntervalMs = 2000; |
| 65 | |
| 66 | const int kHighestNetworkPreference = 127; |
| 67 | |
| 68 | bool CompareNetworks(const Network* a, const Network* b) { |
| 69 | if (a->prefix_length() == b->prefix_length()) { |
| 70 | if (a->name() == b->name()) { |
| 71 | return a->prefix() < b->prefix(); |
| 72 | } |
| 73 | } |
| 74 | return a->name() < b->name(); |
| 75 | } |
| 76 | |
| 77 | bool SortNetworks(const Network* a, const Network* b) { |
| 78 | // Network types will be preferred above everything else while sorting |
| 79 | // Networks. |
| 80 | |
| 81 | // Networks are sorted first by type. |
| 82 | if (a->type() != b->type()) { |
| 83 | return a->type() < b->type(); |
| 84 | } |
| 85 | |
| 86 | // After type, networks are sorted by IP address precedence values |
| 87 | // from RFC 3484-bis |
| 88 | if (IPAddressPrecedence(a->ip()) != IPAddressPrecedence(b->ip())) { |
| 89 | return IPAddressPrecedence(a->ip()) > IPAddressPrecedence(b->ip()); |
| 90 | } |
| 91 | |
| 92 | // TODO(mallinath) - Add VPN and Link speed conditions while sorting. |
| 93 | |
| 94 | // Networks are sorted last by key. |
| 95 | return a->key() > b->key(); |
| 96 | } |
| 97 | |
| 98 | std::string AdapterTypeToString(AdapterType type) { |
| 99 | switch (type) { |
| 100 | case ADAPTER_TYPE_UNKNOWN: |
| 101 | return "Unknown"; |
| 102 | case ADAPTER_TYPE_ETHERNET: |
| 103 | return "Ethernet"; |
| 104 | case ADAPTER_TYPE_WIFI: |
| 105 | return "Wifi"; |
| 106 | case ADAPTER_TYPE_CELLULAR: |
| 107 | return "Cellular"; |
| 108 | case ADAPTER_TYPE_VPN: |
| 109 | return "VPN"; |
| 110 | default: |
| 111 | ASSERT(false); |
| 112 | return std::string(); |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | } // namespace |
| 117 | |
| 118 | std::string MakeNetworkKey(const std::string& name, const IPAddress& prefix, |
| 119 | int prefix_length) { |
| 120 | std::ostringstream ost; |
| 121 | ost << name << "%" << prefix.ToString() << "/" << prefix_length; |
| 122 | return ost.str(); |
| 123 | } |
| 124 | |
| 125 | NetworkManager::NetworkManager() { |
| 126 | } |
| 127 | |
| 128 | NetworkManager::~NetworkManager() { |
| 129 | } |
| 130 | |
| 131 | NetworkManagerBase::NetworkManagerBase() : ipv6_enabled_(true) { |
| 132 | } |
| 133 | |
| 134 | NetworkManagerBase::~NetworkManagerBase() { |
| 135 | for (NetworkMap::iterator i = networks_map_.begin(); |
| 136 | i != networks_map_.end(); ++i) { |
| 137 | delete i->second; |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | void NetworkManagerBase::GetNetworks(NetworkList* result) const { |
| 142 | *result = networks_; |
| 143 | } |
| 144 | |
| 145 | void NetworkManagerBase::MergeNetworkList(const NetworkList& new_networks, |
| 146 | bool* changed) { |
| 147 | // Sort the list so that we can detect when it changes. |
| 148 | typedef std::pair<Network*, std::vector<IPAddress> > address_list; |
| 149 | std::map<std::string, address_list> address_map; |
| 150 | NetworkList list(new_networks); |
| 151 | NetworkList merged_list; |
| 152 | std::sort(list.begin(), list.end(), CompareNetworks); |
| 153 | |
| 154 | *changed = false; |
| 155 | |
| 156 | if (networks_.size() != list.size()) |
| 157 | *changed = true; |
| 158 | |
| 159 | // First, build a set of network-keys to the ipaddresses. |
| 160 | for (uint32 i = 0; i < list.size(); ++i) { |
| 161 | bool might_add_to_merged_list = false; |
| 162 | std::string key = MakeNetworkKey(list[i]->name(), |
| 163 | list[i]->prefix(), |
| 164 | list[i]->prefix_length()); |
| 165 | if (address_map.find(key) == address_map.end()) { |
| 166 | address_map[key] = address_list(list[i], std::vector<IPAddress>()); |
| 167 | might_add_to_merged_list = true; |
| 168 | } |
| 169 | const std::vector<IPAddress>& addresses = list[i]->GetIPs(); |
| 170 | address_list& current_list = address_map[key]; |
| 171 | for (std::vector<IPAddress>::const_iterator it = addresses.begin(); |
| 172 | it != addresses.end(); |
| 173 | ++it) { |
| 174 | current_list.second.push_back(*it); |
| 175 | } |
| 176 | if (!might_add_to_merged_list) { |
| 177 | delete list[i]; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | // Next, look for existing network objects to re-use. |
| 182 | for (std::map<std::string, address_list >::iterator it = address_map.begin(); |
| 183 | it != address_map.end(); |
| 184 | ++it) { |
| 185 | const std::string& key = it->first; |
| 186 | Network* net = it->second.first; |
| 187 | NetworkMap::iterator existing = networks_map_.find(key); |
| 188 | if (existing == networks_map_.end()) { |
| 189 | // This network is new. Place it in the network map. |
| 190 | merged_list.push_back(net); |
| 191 | networks_map_[key] = net; |
| 192 | *changed = true; |
| 193 | } else { |
| 194 | // This network exists in the map already. Reset its IP addresses. |
| 195 | *changed = existing->second->SetIPs(it->second.second, *changed); |
| 196 | merged_list.push_back(existing->second); |
| 197 | if (existing->second != net) { |
| 198 | delete net; |
| 199 | } |
| 200 | } |
| 201 | } |
| 202 | networks_ = merged_list; |
| 203 | |
| 204 | // If the network lists changes, we resort it. |
| 205 | if (changed) { |
| 206 | std::sort(networks_.begin(), networks_.end(), SortNetworks); |
| 207 | // Now network interfaces are sorted, we should set the preference value |
| 208 | // for each of the interfaces we are planning to use. |
| 209 | // Preference order of network interfaces might have changed from previous |
| 210 | // sorting due to addition of higher preference network interface. |
| 211 | // Since we have already sorted the network interfaces based on our |
| 212 | // requirements, we will just assign a preference value starting with 127, |
| 213 | // in decreasing order. |
| 214 | int pref = kHighestNetworkPreference; |
| 215 | for (NetworkList::const_iterator iter = networks_.begin(); |
| 216 | iter != networks_.end(); ++iter) { |
| 217 | (*iter)->set_preference(pref); |
| 218 | if (pref > 0) { |
| 219 | --pref; |
| 220 | } else { |
| 221 | LOG(LS_ERROR) << "Too many network interfaces to handle!"; |
| 222 | break; |
| 223 | } |
| 224 | } |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | BasicNetworkManager::BasicNetworkManager() |
| 229 | : thread_(NULL), sent_first_update_(false), start_count_(0), |
| 230 | ignore_non_default_routes_(false) { |
| 231 | } |
| 232 | |
| 233 | BasicNetworkManager::~BasicNetworkManager() { |
| 234 | } |
| 235 | |
| 236 | #if defined(__native_client__) |
| 237 | |
| 238 | bool BasicNetworkManager::CreateNetworks(bool include_ignored, |
| 239 | NetworkList* networks) const { |
| 240 | ASSERT(false); |
| 241 | LOG(LS_WARNING) << "BasicNetworkManager doesn't work on NaCl yet"; |
| 242 | return false; |
| 243 | } |
| 244 | |
| 245 | #elif defined(WEBRTC_POSIX) |
| 246 | void BasicNetworkManager::ConvertIfAddrs(struct ifaddrs* interfaces, |
| 247 | bool include_ignored, |
| 248 | NetworkList* networks) const { |
| 249 | NetworkMap current_networks; |
| 250 | for (struct ifaddrs* cursor = interfaces; |
| 251 | cursor != NULL; cursor = cursor->ifa_next) { |
| 252 | IPAddress prefix; |
| 253 | IPAddress mask; |
| 254 | IPAddress ip; |
| 255 | int scope_id = 0; |
| 256 | |
| 257 | // Some interfaces may not have address assigned. |
| 258 | if (!cursor->ifa_addr || !cursor->ifa_netmask) |
| 259 | continue; |
| 260 | |
| 261 | switch (cursor->ifa_addr->sa_family) { |
| 262 | case AF_INET: { |
| 263 | ip = IPAddress( |
| 264 | reinterpret_cast<sockaddr_in*>(cursor->ifa_addr)->sin_addr); |
| 265 | mask = IPAddress( |
| 266 | reinterpret_cast<sockaddr_in*>(cursor->ifa_netmask)->sin_addr); |
| 267 | break; |
| 268 | } |
| 269 | case AF_INET6: { |
| 270 | if (ipv6_enabled()) { |
| 271 | ip = IPAddress( |
| 272 | reinterpret_cast<sockaddr_in6*>(cursor->ifa_addr)->sin6_addr); |
| 273 | mask = IPAddress( |
| 274 | reinterpret_cast<sockaddr_in6*>(cursor->ifa_netmask)->sin6_addr); |
| 275 | scope_id = |
| 276 | reinterpret_cast<sockaddr_in6*>(cursor->ifa_addr)->sin6_scope_id; |
| 277 | break; |
| 278 | } else { |
| 279 | continue; |
| 280 | } |
| 281 | } |
| 282 | default: { |
| 283 | continue; |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | int prefix_length = CountIPMaskBits(mask); |
| 288 | prefix = TruncateIP(ip, prefix_length); |
| 289 | std::string key = MakeNetworkKey(std::string(cursor->ifa_name), |
| 290 | prefix, prefix_length); |
| 291 | NetworkMap::iterator existing_network = current_networks.find(key); |
| 292 | if (existing_network == current_networks.end()) { |
| 293 | scoped_ptr<Network> network(new Network(cursor->ifa_name, |
| 294 | cursor->ifa_name, |
| 295 | prefix, |
| 296 | prefix_length)); |
| 297 | network->set_scope_id(scope_id); |
| 298 | network->AddIP(ip); |
| 299 | bool ignored = ((cursor->ifa_flags & IFF_LOOPBACK) || |
| 300 | IsIgnoredNetwork(*network)); |
| 301 | network->set_ignored(ignored); |
| 302 | if (include_ignored || !network->ignored()) { |
| 303 | networks->push_back(network.release()); |
| 304 | } |
| 305 | } else { |
| 306 | (*existing_network).second->AddIP(ip); |
| 307 | } |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | bool BasicNetworkManager::CreateNetworks(bool include_ignored, |
| 312 | NetworkList* networks) const { |
| 313 | struct ifaddrs* interfaces; |
| 314 | int error = getifaddrs(&interfaces); |
| 315 | if (error != 0) { |
| 316 | LOG_ERR(LERROR) << "getifaddrs failed to gather interface data: " << error; |
| 317 | return false; |
| 318 | } |
| 319 | |
| 320 | ConvertIfAddrs(interfaces, include_ignored, networks); |
| 321 | |
| 322 | freeifaddrs(interfaces); |
| 323 | return true; |
| 324 | } |
| 325 | |
| 326 | #elif defined(WEBRTC_WIN) |
| 327 | |
| 328 | unsigned int GetPrefix(PIP_ADAPTER_PREFIX prefixlist, |
| 329 | const IPAddress& ip, IPAddress* prefix) { |
| 330 | IPAddress current_prefix; |
| 331 | IPAddress best_prefix; |
| 332 | unsigned int best_length = 0; |
| 333 | while (prefixlist) { |
| 334 | // Look for the longest matching prefix in the prefixlist. |
| 335 | if (prefixlist->Address.lpSockaddr == NULL || |
| 336 | prefixlist->Address.lpSockaddr->sa_family != ip.family()) { |
| 337 | prefixlist = prefixlist->Next; |
| 338 | continue; |
| 339 | } |
| 340 | switch (prefixlist->Address.lpSockaddr->sa_family) { |
| 341 | case AF_INET: { |
| 342 | sockaddr_in* v4_addr = |
| 343 | reinterpret_cast<sockaddr_in*>(prefixlist->Address.lpSockaddr); |
| 344 | current_prefix = IPAddress(v4_addr->sin_addr); |
| 345 | break; |
| 346 | } |
| 347 | case AF_INET6: { |
| 348 | sockaddr_in6* v6_addr = |
| 349 | reinterpret_cast<sockaddr_in6*>(prefixlist->Address.lpSockaddr); |
| 350 | current_prefix = IPAddress(v6_addr->sin6_addr); |
| 351 | break; |
| 352 | } |
| 353 | default: { |
| 354 | prefixlist = prefixlist->Next; |
| 355 | continue; |
| 356 | } |
| 357 | } |
| 358 | if (TruncateIP(ip, prefixlist->PrefixLength) == current_prefix && |
| 359 | prefixlist->PrefixLength > best_length) { |
| 360 | best_prefix = current_prefix; |
| 361 | best_length = prefixlist->PrefixLength; |
| 362 | } |
| 363 | prefixlist = prefixlist->Next; |
| 364 | } |
| 365 | *prefix = best_prefix; |
| 366 | return best_length; |
| 367 | } |
| 368 | |
| 369 | bool BasicNetworkManager::CreateNetworks(bool include_ignored, |
| 370 | NetworkList* networks) const { |
| 371 | NetworkMap current_networks; |
| 372 | // MSDN recommends a 15KB buffer for the first try at GetAdaptersAddresses. |
| 373 | size_t buffer_size = 16384; |
| 374 | scoped_ptr<char[]> adapter_info(new char[buffer_size]); |
| 375 | PIP_ADAPTER_ADDRESSES adapter_addrs = |
| 376 | reinterpret_cast<PIP_ADAPTER_ADDRESSES>(adapter_info.get()); |
| 377 | int adapter_flags = (GAA_FLAG_SKIP_DNS_SERVER | GAA_FLAG_SKIP_ANYCAST | |
| 378 | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_INCLUDE_PREFIX); |
| 379 | int ret = 0; |
| 380 | do { |
| 381 | adapter_info.reset(new char[buffer_size]); |
| 382 | adapter_addrs = reinterpret_cast<PIP_ADAPTER_ADDRESSES>(adapter_info.get()); |
| 383 | ret = GetAdaptersAddresses(AF_UNSPEC, adapter_flags, |
| 384 | 0, adapter_addrs, |
| 385 | reinterpret_cast<PULONG>(&buffer_size)); |
| 386 | } while (ret == ERROR_BUFFER_OVERFLOW); |
| 387 | if (ret != ERROR_SUCCESS) { |
| 388 | return false; |
| 389 | } |
| 390 | int count = 0; |
| 391 | while (adapter_addrs) { |
| 392 | if (adapter_addrs->OperStatus == IfOperStatusUp) { |
| 393 | PIP_ADAPTER_UNICAST_ADDRESS address = adapter_addrs->FirstUnicastAddress; |
| 394 | PIP_ADAPTER_PREFIX prefixlist = adapter_addrs->FirstPrefix; |
| 395 | std::string name; |
| 396 | std::string description; |
| 397 | #ifdef _DEBUG |
| 398 | name = ToUtf8(adapter_addrs->FriendlyName, |
| 399 | wcslen(adapter_addrs->FriendlyName)); |
| 400 | #endif |
| 401 | description = ToUtf8(adapter_addrs->Description, |
| 402 | wcslen(adapter_addrs->Description)); |
| 403 | for (; address; address = address->Next) { |
| 404 | #ifndef _DEBUG |
| 405 | name = rtc::ToString(count); |
| 406 | #endif |
| 407 | |
| 408 | IPAddress ip; |
| 409 | int scope_id = 0; |
| 410 | scoped_ptr<Network> network; |
| 411 | switch (address->Address.lpSockaddr->sa_family) { |
| 412 | case AF_INET: { |
| 413 | sockaddr_in* v4_addr = |
| 414 | reinterpret_cast<sockaddr_in*>(address->Address.lpSockaddr); |
| 415 | ip = IPAddress(v4_addr->sin_addr); |
| 416 | break; |
| 417 | } |
| 418 | case AF_INET6: { |
| 419 | if (ipv6_enabled()) { |
| 420 | sockaddr_in6* v6_addr = |
| 421 | reinterpret_cast<sockaddr_in6*>(address->Address.lpSockaddr); |
| 422 | scope_id = v6_addr->sin6_scope_id; |
| 423 | ip = IPAddress(v6_addr->sin6_addr); |
| 424 | break; |
| 425 | } else { |
| 426 | continue; |
| 427 | } |
| 428 | } |
| 429 | default: { |
| 430 | continue; |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | IPAddress prefix; |
| 435 | int prefix_length = GetPrefix(prefixlist, ip, &prefix); |
| 436 | std::string key = MakeNetworkKey(name, prefix, prefix_length); |
| 437 | NetworkMap::iterator existing_network = current_networks.find(key); |
| 438 | if (existing_network == current_networks.end()) { |
| 439 | scoped_ptr<Network> network(new Network(name, |
| 440 | description, |
| 441 | prefix, |
| 442 | prefix_length)); |
| 443 | network->set_scope_id(scope_id); |
| 444 | network->AddIP(ip); |
| 445 | bool ignore = ((adapter_addrs->IfType == IF_TYPE_SOFTWARE_LOOPBACK) || |
| 446 | IsIgnoredNetwork(*network)); |
| 447 | network->set_ignored(ignore); |
| 448 | if (include_ignored || !network->ignored()) { |
| 449 | networks->push_back(network.release()); |
| 450 | } |
| 451 | } else { |
| 452 | (*existing_network).second->AddIP(ip); |
| 453 | } |
| 454 | } |
| 455 | // Count is per-adapter - all 'Networks' created from the same |
| 456 | // adapter need to have the same name. |
| 457 | ++count; |
| 458 | } |
| 459 | adapter_addrs = adapter_addrs->Next; |
| 460 | } |
| 461 | return true; |
| 462 | } |
| 463 | #endif // WEBRTC_WIN |
| 464 | |
| 465 | #if defined(WEBRTC_LINUX) |
| 466 | bool IsDefaultRoute(const std::string& network_name) { |
| 467 | FileStream fs; |
| 468 | if (!fs.Open("/proc/net/route", "r", NULL)) { |
| 469 | LOG(LS_WARNING) << "Couldn't read /proc/net/route, skipping default " |
| 470 | << "route check (assuming everything is a default route)."; |
| 471 | return true; |
| 472 | } else { |
| 473 | std::string line; |
| 474 | while (fs.ReadLine(&line) == SR_SUCCESS) { |
| 475 | char iface_name[256]; |
| 476 | unsigned int iface_ip, iface_gw, iface_mask, iface_flags; |
| 477 | if (sscanf(line.c_str(), |
| 478 | "%255s %8X %8X %4X %*d %*u %*d %8X", |
| 479 | iface_name, &iface_ip, &iface_gw, |
| 480 | &iface_flags, &iface_mask) == 5 && |
| 481 | network_name == iface_name && |
| 482 | iface_mask == 0 && |
| 483 | (iface_flags & (RTF_UP | RTF_HOST)) == RTF_UP) { |
| 484 | return true; |
| 485 | } |
| 486 | } |
| 487 | } |
| 488 | return false; |
| 489 | } |
| 490 | #endif |
| 491 | |
| 492 | bool BasicNetworkManager::IsIgnoredNetwork(const Network& network) const { |
| 493 | // Ignore networks on the explicit ignore list. |
| 494 | for (size_t i = 0; i < network_ignore_list_.size(); ++i) { |
| 495 | if (network.name() == network_ignore_list_[i]) { |
| 496 | return true; |
| 497 | } |
| 498 | } |
| 499 | #if defined(WEBRTC_POSIX) |
| 500 | // Filter out VMware interfaces, typically named vmnet1 and vmnet8 |
| 501 | if (strncmp(network.name().c_str(), "vmnet", 5) == 0 || |
| 502 | strncmp(network.name().c_str(), "vnic", 4) == 0) { |
| 503 | return true; |
| 504 | } |
| 505 | #if defined(WEBRTC_LINUX) |
| 506 | // Make sure this is a default route, if we're ignoring non-defaults. |
| 507 | if (ignore_non_default_routes_ && !IsDefaultRoute(network.name())) { |
| 508 | return true; |
| 509 | } |
| 510 | #endif |
| 511 | #elif defined(WEBRTC_WIN) |
| 512 | // Ignore any HOST side vmware adapters with a description like: |
| 513 | // VMware Virtual Ethernet Adapter for VMnet1 |
| 514 | // but don't ignore any GUEST side adapters with a description like: |
| 515 | // VMware Accelerated AMD PCNet Adapter #2 |
| 516 | if (strstr(network.description().c_str(), "VMnet") != NULL) { |
| 517 | return true; |
| 518 | } |
| 519 | #endif |
| 520 | |
| 521 | // Ignore any networks with a 0.x.y.z IP |
| 522 | if (network.prefix().family() == AF_INET) { |
| 523 | return (network.prefix().v4AddressAsHostOrderInteger() < 0x01000000); |
| 524 | } |
| 525 | return false; |
| 526 | } |
| 527 | |
| 528 | void BasicNetworkManager::StartUpdating() { |
| 529 | thread_ = Thread::Current(); |
| 530 | if (start_count_) { |
| 531 | // If network interfaces are already discovered and signal is sent, |
| 532 | // we should trigger network signal immediately for the new clients |
| 533 | // to start allocating ports. |
| 534 | if (sent_first_update_) |
| 535 | thread_->Post(this, kSignalNetworksMessage); |
| 536 | } else { |
| 537 | thread_->Post(this, kUpdateNetworksMessage); |
| 538 | } |
| 539 | ++start_count_; |
| 540 | } |
| 541 | |
| 542 | void BasicNetworkManager::StopUpdating() { |
| 543 | ASSERT(Thread::Current() == thread_); |
| 544 | if (!start_count_) |
| 545 | return; |
| 546 | |
| 547 | --start_count_; |
| 548 | if (!start_count_) { |
| 549 | thread_->Clear(this); |
| 550 | sent_first_update_ = false; |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | void BasicNetworkManager::OnMessage(Message* msg) { |
| 555 | switch (msg->message_id) { |
| 556 | case kUpdateNetworksMessage: { |
| 557 | DoUpdateNetworks(); |
| 558 | break; |
| 559 | } |
| 560 | case kSignalNetworksMessage: { |
| 561 | SignalNetworksChanged(); |
| 562 | break; |
| 563 | } |
| 564 | default: |
| 565 | ASSERT(false); |
| 566 | } |
| 567 | } |
| 568 | |
| 569 | void BasicNetworkManager::DoUpdateNetworks() { |
| 570 | if (!start_count_) |
| 571 | return; |
| 572 | |
| 573 | ASSERT(Thread::Current() == thread_); |
| 574 | |
| 575 | NetworkList list; |
| 576 | if (!CreateNetworks(false, &list)) { |
| 577 | SignalError(); |
| 578 | } else { |
| 579 | bool changed; |
| 580 | MergeNetworkList(list, &changed); |
| 581 | if (changed || !sent_first_update_) { |
| 582 | SignalNetworksChanged(); |
| 583 | sent_first_update_ = true; |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | thread_->PostDelayed(kNetworksUpdateIntervalMs, this, kUpdateNetworksMessage); |
| 588 | } |
| 589 | |
| 590 | void BasicNetworkManager::DumpNetworks(bool include_ignored) { |
| 591 | NetworkList list; |
| 592 | CreateNetworks(include_ignored, &list); |
| 593 | LOG(LS_INFO) << "NetworkManager detected " << list.size() << " networks:"; |
| 594 | for (size_t i = 0; i < list.size(); ++i) { |
| 595 | const Network* network = list[i]; |
| 596 | if (!network->ignored() || include_ignored) { |
| 597 | LOG(LS_INFO) << network->ToString() << ": " |
| 598 | << network->description() |
| 599 | << ((network->ignored()) ? ", Ignored" : ""); |
| 600 | } |
| 601 | } |
| 602 | // Release the network list created previously. |
| 603 | // Do this in a seperated for loop for better readability. |
| 604 | for (size_t i = 0; i < list.size(); ++i) { |
| 605 | delete list[i]; |
| 606 | } |
| 607 | } |
| 608 | |
| 609 | Network::Network(const std::string& name, const std::string& desc, |
| 610 | const IPAddress& prefix, int prefix_length) |
| 611 | : name_(name), description_(desc), prefix_(prefix), |
| 612 | prefix_length_(prefix_length), |
| 613 | key_(MakeNetworkKey(name, prefix, prefix_length)), scope_id_(0), |
| 614 | ignored_(false), type_(ADAPTER_TYPE_UNKNOWN), preference_(0) { |
| 615 | } |
| 616 | |
| 617 | Network::Network(const std::string& name, const std::string& desc, |
| 618 | const IPAddress& prefix, int prefix_length, AdapterType type) |
| 619 | : name_(name), description_(desc), prefix_(prefix), |
| 620 | prefix_length_(prefix_length), |
| 621 | key_(MakeNetworkKey(name, prefix, prefix_length)), scope_id_(0), |
| 622 | ignored_(false), type_(type), preference_(0) { |
| 623 | } |
| 624 | |
| 625 | std::string Network::ToString() const { |
| 626 | std::stringstream ss; |
| 627 | // Print out the first space-terminated token of the network desc, plus |
| 628 | // the IP address. |
| 629 | ss << "Net[" << description_.substr(0, description_.find(' ')) |
| 630 | << ":" << prefix_.ToSensitiveString() << "/" << prefix_length_ |
| 631 | << ":" << AdapterTypeToString(type_) << "]"; |
| 632 | return ss.str(); |
| 633 | } |
| 634 | |
| 635 | // Sets the addresses of this network. Returns true if the address set changed. |
| 636 | // Change detection is short circuited if the changed argument is true. |
| 637 | bool Network::SetIPs(const std::vector<IPAddress>& ips, bool changed) { |
| 638 | changed = changed || ips.size() != ips_.size(); |
| 639 | // Detect changes with a nested loop; n-squared but we expect on the order |
| 640 | // of 2-3 addresses per network. |
| 641 | for (std::vector<IPAddress>::const_iterator it = ips.begin(); |
| 642 | !changed && it != ips.end(); |
| 643 | ++it) { |
| 644 | bool found = false; |
| 645 | for (std::vector<IPAddress>::iterator inner_it = ips_.begin(); |
| 646 | !found && inner_it != ips_.end(); |
| 647 | ++inner_it) { |
| 648 | if (*it == *inner_it) { |
| 649 | found = true; |
| 650 | } |
| 651 | } |
| 652 | changed = !found; |
| 653 | } |
| 654 | ips_ = ips; |
| 655 | return changed; |
| 656 | } |
| 657 | |
| 658 | } // namespace rtc |