blob: 73704cde69de5b5697acf1a5d621a5d880d5c1da [file] [log] [blame]
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/base/net_util.h"
#include <set>
#include <sys/types.h>
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_tokenizer.h"
#include "base/strings/string_util.h"
#include "base/threading/thread_restrictions.h"
#include "net/base/escape.h"
#include "net/base/ip_endpoint.h"
#include "net/base/net_errors.h"
#include "url/gurl.h"
#if !defined(OS_ANDROID) && !defined(OS_NACL)
#include <ifaddrs.h>
#include <net/if.h>
#include <netinet/in.h>
#endif
#if defined(OS_MACOSX) && !defined(OS_IOS)
#include <net/if_media.h>
#include <netinet/in_var.h>
#include <sys/ioctl.h>
#endif
#if defined(OS_ANDROID)
#include "net/android/network_library.h"
#endif
namespace net {
namespace {
#if !defined(OS_ANDROID)
struct NetworkInterfaceInfo {
NetworkInterfaceInfo() : permanent(true) { }
bool permanent; // IPv6 has notion of temporary address. If the address is
// IPv6 and it's temporary this field will be false.
NetworkInterface interface;
};
// This method will remove permanent IPv6 addresses if a temporary address
// is available for same network interface.
void RemovePermanentIPv6AddressesWhereTemporaryExists(
std::vector<NetworkInterfaceInfo>* infos) {
if (!infos || infos->empty())
return;
// Build a set containing the names of interfaces with a temp IPv6 address
std::set<std::string> ifaces_with_temp_addrs;
std::vector<NetworkInterfaceInfo>::iterator i;
for (i = infos->begin(); i != infos->end(); ++i) {
if (!i->permanent && i->interface.address.size() == kIPv6AddressSize) {
ifaces_with_temp_addrs.insert(i->interface.name);
}
}
// If there are no such interfaces then there's no further work.
if (ifaces_with_temp_addrs.empty())
return;
// Search for permenent addresses belonging to same network interface.
for (i = infos->begin(); i != infos->end(); ) {
// If the address is IPv6 and it's permanent and there is temporary
// address for it, then we can remove this address.
if ((i->interface.address.size() == kIPv6AddressSize) && i->permanent &&
(ifaces_with_temp_addrs.find(i->interface.name) !=
ifaces_with_temp_addrs.end())) {
i = infos->erase(i);
} else {
++i;
}
}
}
#endif
#if defined(OS_MACOSX) && !defined(OS_IOS)
NetworkChangeNotifier::ConnectionType GetNetworkInterfaceType(
int addr_family, const std::string& interface_name) {
NetworkChangeNotifier::ConnectionType type =
NetworkChangeNotifier::CONNECTION_UNKNOWN;
struct ifmediareq ifmr = {};
strncpy(ifmr.ifm_name, interface_name.c_str(), sizeof(ifmr.ifm_name) - 1);
int s = socket(addr_family, SOCK_DGRAM, 0);
if (s == -1) {
return type;
}
if (ioctl(s, SIOCGIFMEDIA, &ifmr) != -1) {
if (ifmr.ifm_current & IFM_IEEE80211) {
type = NetworkChangeNotifier::CONNECTION_WIFI;
} else if (ifmr.ifm_current & IFM_ETHER) {
type = NetworkChangeNotifier::CONNECTION_ETHERNET;
}
}
close(s);
return type;
}
#endif
} // namespace
bool GetNetworkList(NetworkInterfaceList* networks, int policy) {
#if defined(OS_NACL)
NOTIMPLEMENTED();
return false;
#elif defined(OS_ANDROID)
std::string network_list = android::GetNetworkList();
base::StringTokenizer network_interfaces(network_list, "\n");
while (network_interfaces.GetNext()) {
std::string network_item = network_interfaces.token();
base::StringTokenizer network_tokenizer(network_item, "\t");
CHECK(network_tokenizer.GetNext());
std::string name = network_tokenizer.token();
CHECK(network_tokenizer.GetNext());
std::string interface_address = network_tokenizer.token();
IPAddressNumber address;
size_t network_prefix = 0;
CHECK(ParseCIDRBlock(network_tokenizer.token(),
&address,
&network_prefix));
CHECK(network_tokenizer.GetNext());
uint32 index = 0;
CHECK(base::StringToUint(network_tokenizer.token(), &index));
networks->push_back(
NetworkInterface(name,
name,
index,
NetworkChangeNotifier::CONNECTION_UNKNOWN,
address,
network_prefix,
IP_ADDRESS_ATTRIBUTE_NONE));
}
return true;
#else
// getifaddrs() may require IO operations.
base::ThreadRestrictions::AssertIOAllowed();
#if defined(OS_MACOSX) && !defined(OS_IOS)
int ioctl_socket = -1;
if (policy & INCLUDE_ONLY_TEMP_IPV6_ADDRESS_IF_POSSIBLE) {
// we need a socket to query information about temporary address.
ioctl_socket = socket(AF_INET6, SOCK_DGRAM, 0);
DCHECK_GT(ioctl_socket, 0);
}
#endif
ifaddrs *interfaces;
if (getifaddrs(&interfaces) < 0) {
PLOG(ERROR) << "getifaddrs";
return false;
}
std::vector<NetworkInterfaceInfo> network_infos;
// Enumerate the addresses assigned to network interfaces which are up.
for (ifaddrs *interface = interfaces;
interface != NULL;
interface = interface->ifa_next) {
// Skip loopback interfaces, and ones which are down.
if (!(IFF_UP & interface->ifa_flags))
continue;
if (IFF_LOOPBACK & interface->ifa_flags)
continue;
// Skip interfaces with no address configured.
struct sockaddr* addr = interface->ifa_addr;
if (!addr)
continue;
// Skip unspecified addresses (i.e. made of zeroes) and loopback addresses
// configured on non-loopback interfaces.
int addr_size = 0;
if (addr->sa_family == AF_INET6) {
struct sockaddr_in6* addr_in6 =
reinterpret_cast<struct sockaddr_in6*>(addr);
struct in6_addr* sin6_addr = &addr_in6->sin6_addr;
addr_size = sizeof(*addr_in6);
if (IN6_IS_ADDR_LOOPBACK(sin6_addr) ||
IN6_IS_ADDR_UNSPECIFIED(sin6_addr)) {
continue;
}
} else if (addr->sa_family == AF_INET) {
struct sockaddr_in* addr_in =
reinterpret_cast<struct sockaddr_in*>(addr);
addr_size = sizeof(*addr_in);
if (addr_in->sin_addr.s_addr == INADDR_LOOPBACK ||
addr_in->sin_addr.s_addr == 0) {
continue;
}
} else {
// Skip non-IP addresses.
continue;
}
const std::string& name = interface->ifa_name;
// Filter out VMware interfaces, typically named vmnet1 and vmnet8.
if ((policy & EXCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES) &&
((name.find("vmnet") != std::string::npos) ||
(name.find("vnic") != std::string::npos))) {
continue;
}
NetworkInterfaceInfo network_info;
NetworkChangeNotifier::ConnectionType connection_type =
NetworkChangeNotifier::CONNECTION_UNKNOWN;
#if defined(OS_MACOSX) && !defined(OS_IOS)
// Check if this is a temporary address. Currently this is only supported
// on Mac.
if ((policy & INCLUDE_ONLY_TEMP_IPV6_ADDRESS_IF_POSSIBLE) &&
ioctl_socket >= 0 && addr->sa_family == AF_INET6) {
struct in6_ifreq ifr = {};
strncpy(ifr.ifr_name, interface->ifa_name, sizeof(ifr.ifr_name) - 1);
memcpy(&ifr.ifr_ifru.ifru_addr, interface->ifa_addr,
interface->ifa_addr->sa_len);
int rv = ioctl(ioctl_socket, SIOCGIFAFLAG_IN6, &ifr);
if (rv >= 0) {
network_info.permanent = !(ifr.ifr_ifru.ifru_flags & IN6_IFF_TEMPORARY);
}
}
connection_type = GetNetworkInterfaceType(addr->sa_family, name);
#endif
IPEndPoint address;
if (address.FromSockAddr(addr, addr_size)) {
uint8 net_mask = 0;
if (interface->ifa_netmask) {
// If not otherwise set, assume the same sa_family as ifa_addr.
if (interface->ifa_netmask->sa_family == 0) {
interface->ifa_netmask->sa_family = addr->sa_family;
}
IPEndPoint netmask;
if (netmask.FromSockAddr(interface->ifa_netmask, addr_size)) {
net_mask = MaskPrefixLength(netmask.address());
}
}
network_info.interface = NetworkInterface(name,
name,
if_nametoindex(name.c_str()),
connection_type,
address.address(),
net_mask,
IP_ADDRESS_ATTRIBUTE_NONE);
network_infos.push_back(NetworkInterfaceInfo(network_info));
}
}
freeifaddrs(interfaces);
#if defined(OS_MACOSX) && !defined(OS_IOS)
if (ioctl_socket >= 0) {
close(ioctl_socket);
}
#endif
if (policy & INCLUDE_ONLY_TEMP_IPV6_ADDRESS_IF_POSSIBLE) {
RemovePermanentIPv6AddressesWhereTemporaryExists(&network_infos);
}
for (size_t i = 0; i < network_infos.size(); ++i) {
networks->push_back(network_infos[i].interface);
}
return true;
#endif
}
WifiPHYLayerProtocol GetWifiPHYLayerProtocol() {
return WIFI_PHY_LAYER_PROTOCOL_UNKNOWN;
}
scoped_ptr<ScopedWifiOptions> SetWifiOptions(int options) {
return scoped_ptr<ScopedWifiOptions>();
}
} // namespace net