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32 #include "talk/base/network.h"
35 // linux/if.h can't be included at the same time as the posix sys/if.h, and
36 // it's transitively required by linux/route.h, so include that version on
37 // linux instead of the standard posix one.
38 #if defined(ANDROID) || defined(LINUX)
40 #include <linux/route.h>
41 #elif !defined(__native_client__)
44 #include <sys/socket.h>
45 #include <sys/utsname.h>
46 #include <sys/ioctl.h>
51 #include "talk/base/ifaddrs-android.h"
52 #elif !defined(__native_client__)
59 #include "talk/base/win32.h"
67 #include "talk/base/logging.h"
68 #include "talk/base/scoped_ptr.h"
69 #include "talk/base/socket.h" // includes something that makes windows happy
70 #include "talk/base/stream.h"
71 #include "talk/base/stringencode.h"
72 #include "talk/base/thread.h"
77 const uint32 kUpdateNetworksMessage = 1;
78 const uint32 kSignalNetworksMessage = 2;
80 // Fetch list of networks every two seconds.
81 const int kNetworksUpdateIntervalMs = 2000;
83 const int kHighestNetworkPreference = 127;
85 bool CompareNetworks(const Network* a, const Network* b) {
86 if (a->prefix_length() == b->prefix_length()) {
87 if (a->name() == b->name()) {
88 return a->prefix() < b->prefix();
91 return a->name() < b->name();
94 bool SortNetworks(const Network* a, const Network* b) {
95 // Network types will be preferred above everything else while sorting
98 // Networks are sorted first by type.
99 if (a->type() != b->type()) {
100 return a->type() < b->type();
103 // After type, networks are sorted by IP address precedence values
105 if (IPAddressPrecedence(a->ip()) != IPAddressPrecedence(b->ip())) {
106 return IPAddressPrecedence(a->ip()) > IPAddressPrecedence(b->ip());
109 // TODO(mallinath) - Add VPN and Link speed conditions while sorting.
111 // Networks are sorted last by key.
112 return a->key() > b->key();
115 std::string AdapterTypeToString(AdapterType type) {
117 case ADAPTER_TYPE_UNKNOWN:
119 case ADAPTER_TYPE_ETHERNET:
121 case ADAPTER_TYPE_WIFI:
123 case ADAPTER_TYPE_CELLULAR:
125 case ADAPTER_TYPE_VPN:
129 return std::string();
135 std::string MakeNetworkKey(const std::string& name, const IPAddress& prefix,
137 std::ostringstream ost;
138 ost << name << "%" << prefix.ToString() << "/" << prefix_length;
142 NetworkManager::NetworkManager() {
145 NetworkManager::~NetworkManager() {
148 NetworkManagerBase::NetworkManagerBase() : ipv6_enabled_(true) {
151 NetworkManagerBase::~NetworkManagerBase() {
152 for (NetworkMap::iterator i = networks_map_.begin();
153 i != networks_map_.end(); ++i) {
158 void NetworkManagerBase::GetNetworks(NetworkList* result) const {
162 void NetworkManagerBase::MergeNetworkList(const NetworkList& new_networks,
164 // Sort the list so that we can detect when it changes.
165 typedef std::pair<Network*, std::vector<IPAddress> > address_list;
166 std::map<std::string, address_list> address_map;
167 NetworkList list(new_networks);
168 NetworkList merged_list;
169 std::sort(list.begin(), list.end(), CompareNetworks);
173 if (networks_.size() != list.size())
176 // First, build a set of network-keys to the ipaddresses.
177 for (uint32 i = 0; i < list.size(); ++i) {
178 bool might_add_to_merged_list = false;
179 std::string key = MakeNetworkKey(list[i]->name(),
181 list[i]->prefix_length());
182 if (address_map.find(key) == address_map.end()) {
183 address_map[key] = address_list(list[i], std::vector<IPAddress>());
184 might_add_to_merged_list = true;
186 const std::vector<IPAddress>& addresses = list[i]->GetIPs();
187 address_list& current_list = address_map[key];
188 for (std::vector<IPAddress>::const_iterator it = addresses.begin();
189 it != addresses.end();
191 current_list.second.push_back(*it);
193 if (!might_add_to_merged_list) {
198 // Next, look for existing network objects to re-use.
199 for (std::map<std::string, address_list >::iterator it = address_map.begin();
200 it != address_map.end();
202 const std::string& key = it->first;
203 Network* net = it->second.first;
204 NetworkMap::iterator existing = networks_map_.find(key);
205 if (existing == networks_map_.end()) {
206 // This network is new. Place it in the network map.
207 merged_list.push_back(net);
208 networks_map_[key] = net;
211 // This network exists in the map already. Reset its IP addresses.
212 *changed = existing->second->SetIPs(it->second.second, *changed);
213 merged_list.push_back(existing->second);
214 if (existing->second != net) {
219 networks_ = merged_list;
221 // If the network lists changes, we resort it.
223 std::sort(networks_.begin(), networks_.end(), SortNetworks);
224 // Now network interfaces are sorted, we should set the preference value
225 // for each of the interfaces we are planning to use.
226 // Preference order of network interfaces might have changed from previous
227 // sorting due to addition of higher preference network interface.
228 // Since we have already sorted the network interfaces based on our
229 // requirements, we will just assign a preference value starting with 127,
230 // in decreasing order.
231 int pref = kHighestNetworkPreference;
232 for (NetworkList::const_iterator iter = networks_.begin();
233 iter != networks_.end(); ++iter) {
234 (*iter)->set_preference(pref);
238 LOG(LS_ERROR) << "Too many network interfaces to handle!";
245 BasicNetworkManager::BasicNetworkManager()
246 : thread_(NULL), sent_first_update_(false), start_count_(0),
247 ignore_non_default_routes_(false) {
250 BasicNetworkManager::~BasicNetworkManager() {
253 #if defined(__native_client__)
255 bool BasicNetworkManager::CreateNetworks(bool include_ignored,
256 NetworkList* networks) const {
258 LOG(LS_WARNING) << "BasicNetworkManager doesn't work on NaCl yet";
263 void BasicNetworkManager::ConvertIfAddrs(struct ifaddrs* interfaces,
264 bool include_ignored,
265 NetworkList* networks) const {
266 NetworkMap current_networks;
267 for (struct ifaddrs* cursor = interfaces;
268 cursor != NULL; cursor = cursor->ifa_next) {
274 // Some interfaces may not have address assigned.
275 if (!cursor->ifa_addr || !cursor->ifa_netmask)
278 switch (cursor->ifa_addr->sa_family) {
281 reinterpret_cast<sockaddr_in*>(cursor->ifa_addr)->sin_addr);
283 reinterpret_cast<sockaddr_in*>(cursor->ifa_netmask)->sin_addr);
287 if (ipv6_enabled()) {
289 reinterpret_cast<sockaddr_in6*>(cursor->ifa_addr)->sin6_addr);
291 reinterpret_cast<sockaddr_in6*>(cursor->ifa_netmask)->sin6_addr);
293 reinterpret_cast<sockaddr_in6*>(cursor->ifa_addr)->sin6_scope_id;
304 int prefix_length = CountIPMaskBits(mask);
305 prefix = TruncateIP(ip, prefix_length);
306 std::string key = MakeNetworkKey(std::string(cursor->ifa_name),
307 prefix, prefix_length);
308 NetworkMap::iterator existing_network = current_networks.find(key);
309 if (existing_network == current_networks.end()) {
310 scoped_ptr<Network> network(new Network(cursor->ifa_name,
314 network->set_scope_id(scope_id);
316 bool ignored = ((cursor->ifa_flags & IFF_LOOPBACK) ||
317 IsIgnoredNetwork(*network));
318 network->set_ignored(ignored);
319 if (include_ignored || !network->ignored()) {
320 networks->push_back(network.release());
323 (*existing_network).second->AddIP(ip);
328 bool BasicNetworkManager::CreateNetworks(bool include_ignored,
329 NetworkList* networks) const {
330 struct ifaddrs* interfaces;
331 int error = getifaddrs(&interfaces);
333 LOG_ERR(LERROR) << "getifaddrs failed to gather interface data: " << error;
337 ConvertIfAddrs(interfaces, include_ignored, networks);
339 freeifaddrs(interfaces);
345 unsigned int GetPrefix(PIP_ADAPTER_PREFIX prefixlist,
346 const IPAddress& ip, IPAddress* prefix) {
347 IPAddress current_prefix;
348 IPAddress best_prefix;
349 unsigned int best_length = 0;
351 // Look for the longest matching prefix in the prefixlist.
352 if (prefixlist->Address.lpSockaddr == NULL ||
353 prefixlist->Address.lpSockaddr->sa_family != ip.family()) {
354 prefixlist = prefixlist->Next;
357 switch (prefixlist->Address.lpSockaddr->sa_family) {
359 sockaddr_in* v4_addr =
360 reinterpret_cast<sockaddr_in*>(prefixlist->Address.lpSockaddr);
361 current_prefix = IPAddress(v4_addr->sin_addr);
365 sockaddr_in6* v6_addr =
366 reinterpret_cast<sockaddr_in6*>(prefixlist->Address.lpSockaddr);
367 current_prefix = IPAddress(v6_addr->sin6_addr);
371 prefixlist = prefixlist->Next;
375 if (TruncateIP(ip, prefixlist->PrefixLength) == current_prefix &&
376 prefixlist->PrefixLength > best_length) {
377 best_prefix = current_prefix;
378 best_length = prefixlist->PrefixLength;
380 prefixlist = prefixlist->Next;
382 *prefix = best_prefix;
386 bool BasicNetworkManager::CreateNetworks(bool include_ignored,
387 NetworkList* networks) const {
388 NetworkMap current_networks;
389 // MSDN recommends a 15KB buffer for the first try at GetAdaptersAddresses.
390 size_t buffer_size = 16384;
391 scoped_ptr<char[]> adapter_info(new char[buffer_size]);
392 PIP_ADAPTER_ADDRESSES adapter_addrs =
393 reinterpret_cast<PIP_ADAPTER_ADDRESSES>(adapter_info.get());
394 int adapter_flags = (GAA_FLAG_SKIP_DNS_SERVER | GAA_FLAG_SKIP_ANYCAST |
395 GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_INCLUDE_PREFIX);
398 adapter_info.reset(new char[buffer_size]);
399 adapter_addrs = reinterpret_cast<PIP_ADAPTER_ADDRESSES>(adapter_info.get());
400 ret = GetAdaptersAddresses(AF_UNSPEC, adapter_flags,
402 reinterpret_cast<PULONG>(&buffer_size));
403 } while (ret == ERROR_BUFFER_OVERFLOW);
404 if (ret != ERROR_SUCCESS) {
408 while (adapter_addrs) {
409 if (adapter_addrs->OperStatus == IfOperStatusUp) {
410 PIP_ADAPTER_UNICAST_ADDRESS address = adapter_addrs->FirstUnicastAddress;
411 PIP_ADAPTER_PREFIX prefixlist = adapter_addrs->FirstPrefix;
413 std::string description;
415 name = ToUtf8(adapter_addrs->FriendlyName,
416 wcslen(adapter_addrs->FriendlyName));
418 description = ToUtf8(adapter_addrs->Description,
419 wcslen(adapter_addrs->Description));
420 for (; address; address = address->Next) {
422 name = talk_base::ToString(count);
427 scoped_ptr<Network> network;
428 switch (address->Address.lpSockaddr->sa_family) {
430 sockaddr_in* v4_addr =
431 reinterpret_cast<sockaddr_in*>(address->Address.lpSockaddr);
432 ip = IPAddress(v4_addr->sin_addr);
436 if (ipv6_enabled()) {
437 sockaddr_in6* v6_addr =
438 reinterpret_cast<sockaddr_in6*>(address->Address.lpSockaddr);
439 scope_id = v6_addr->sin6_scope_id;
440 ip = IPAddress(v6_addr->sin6_addr);
452 int prefix_length = GetPrefix(prefixlist, ip, &prefix);
453 std::string key = MakeNetworkKey(name, prefix, prefix_length);
454 NetworkMap::iterator existing_network = current_networks.find(key);
455 if (existing_network == current_networks.end()) {
456 scoped_ptr<Network> network(new Network(name,
460 network->set_scope_id(scope_id);
462 bool ignore = ((adapter_addrs->IfType == IF_TYPE_SOFTWARE_LOOPBACK) ||
463 IsIgnoredNetwork(*network));
464 network->set_ignored(ignore);
465 if (include_ignored || !network->ignored()) {
466 networks->push_back(network.release());
469 (*existing_network).second->AddIP(ip);
472 // Count is per-adapter - all 'Networks' created from the same
473 // adapter need to have the same name.
476 adapter_addrs = adapter_addrs->Next;
482 #if defined(ANDROID) || defined(LINUX)
483 bool IsDefaultRoute(const std::string& network_name) {
485 if (!fs.Open("/proc/net/route", "r", NULL)) {
486 LOG(LS_WARNING) << "Couldn't read /proc/net/route, skipping default "
487 << "route check (assuming everything is a default route).";
491 while (fs.ReadLine(&line) == SR_SUCCESS) {
492 char iface_name[256];
493 unsigned int iface_ip, iface_gw, iface_mask, iface_flags;
494 if (sscanf(line.c_str(),
495 "%255s %8X %8X %4X %*d %*u %*d %8X",
496 iface_name, &iface_ip, &iface_gw,
497 &iface_flags, &iface_mask) == 5 &&
498 network_name == iface_name &&
500 (iface_flags & (RTF_UP | RTF_HOST)) == RTF_UP) {
509 bool BasicNetworkManager::IsIgnoredNetwork(const Network& network) const {
510 // Ignore networks on the explicit ignore list.
511 for (size_t i = 0; i < network_ignore_list_.size(); ++i) {
512 if (network.name() == network_ignore_list_[i]) {
517 // Filter out VMware interfaces, typically named vmnet1 and vmnet8
518 if (strncmp(network.name().c_str(), "vmnet", 5) == 0 ||
519 strncmp(network.name().c_str(), "vnic", 4) == 0) {
522 #if defined(ANDROID) || defined(LINUX)
523 // Make sure this is a default route, if we're ignoring non-defaults.
524 if (ignore_non_default_routes_ && !IsDefaultRoute(network.name())) {
529 // Ignore any HOST side vmware adapters with a description like:
530 // VMware Virtual Ethernet Adapter for VMnet1
531 // but don't ignore any GUEST side adapters with a description like:
532 // VMware Accelerated AMD PCNet Adapter #2
533 if (strstr(network.description().c_str(), "VMnet") != NULL) {
538 // Ignore any networks with a 0.x.y.z IP
539 if (network.prefix().family() == AF_INET) {
540 return (network.prefix().v4AddressAsHostOrderInteger() < 0x01000000);
545 void BasicNetworkManager::StartUpdating() {
546 thread_ = Thread::Current();
548 // If network interfaces are already discovered and signal is sent,
549 // we should trigger network signal immediately for the new clients
550 // to start allocating ports.
551 if (sent_first_update_)
552 thread_->Post(this, kSignalNetworksMessage);
554 thread_->Post(this, kUpdateNetworksMessage);
559 void BasicNetworkManager::StopUpdating() {
560 ASSERT(Thread::Current() == thread_);
566 thread_->Clear(this);
567 sent_first_update_ = false;
571 void BasicNetworkManager::OnMessage(Message* msg) {
572 switch (msg->message_id) {
573 case kUpdateNetworksMessage: {
577 case kSignalNetworksMessage: {
578 SignalNetworksChanged();
586 void BasicNetworkManager::DoUpdateNetworks() {
590 ASSERT(Thread::Current() == thread_);
593 if (!CreateNetworks(false, &list)) {
597 MergeNetworkList(list, &changed);
598 if (changed || !sent_first_update_) {
599 SignalNetworksChanged();
600 sent_first_update_ = true;
604 thread_->PostDelayed(kNetworksUpdateIntervalMs, this, kUpdateNetworksMessage);
607 void BasicNetworkManager::DumpNetworks(bool include_ignored) {
609 CreateNetworks(include_ignored, &list);
610 LOG(LS_INFO) << "NetworkManager detected " << list.size() << " networks:";
611 for (size_t i = 0; i < list.size(); ++i) {
612 const Network* network = list[i];
613 if (!network->ignored() || include_ignored) {
614 LOG(LS_INFO) << network->ToString() << ": "
615 << network->description()
616 << ((network->ignored()) ? ", Ignored" : "");
619 // Release the network list created previously.
620 // Do this in a seperated for loop for better readability.
621 for (size_t i = 0; i < list.size(); ++i) {
626 Network::Network(const std::string& name, const std::string& desc,
627 const IPAddress& prefix, int prefix_length)
628 : name_(name), description_(desc), prefix_(prefix),
629 prefix_length_(prefix_length),
630 key_(MakeNetworkKey(name, prefix, prefix_length)), scope_id_(0),
631 ignored_(false), type_(ADAPTER_TYPE_UNKNOWN), preference_(0) {
634 Network::Network(const std::string& name, const std::string& desc,
635 const IPAddress& prefix, int prefix_length, AdapterType type)
636 : name_(name), description_(desc), prefix_(prefix),
637 prefix_length_(prefix_length),
638 key_(MakeNetworkKey(name, prefix, prefix_length)), scope_id_(0),
639 ignored_(false), type_(type), preference_(0) {
642 std::string Network::ToString() const {
643 std::stringstream ss;
644 // Print out the first space-terminated token of the network desc, plus
646 ss << "Net[" << description_.substr(0, description_.find(' '))
647 << ":" << prefix_.ToSensitiveString() << "/" << prefix_length_
648 << ":" << AdapterTypeToString(type_) << "]";
652 // Sets the addresses of this network. Returns true if the address set changed.
653 // Change detection is short circuited if the changed argument is true.
654 bool Network::SetIPs(const std::vector<IPAddress>& ips, bool changed) {
655 changed = changed || ips.size() != ips_.size();
656 // Detect changes with a nested loop; n-squared but we expect on the order
657 // of 2-3 addresses per network.
658 for (std::vector<IPAddress>::const_iterator it = ips.begin();
659 !changed && it != ips.end();
662 for (std::vector<IPAddress>::iterator inner_it = ips_.begin();
663 !found && inner_it != ips_.end();
665 if (*it == *inner_it) {
675 } // namespace talk_base