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| 1 // Copyright (c) 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "chrome/browser/media/router/discovery/discovery_network_list.h" |
| 6 |
| 7 #include <ifaddrs.h> |
| 8 #include <net/if.h> |
| 9 #include <net/if_arp.h> |
| 10 #include <netinet/in.h> |
| 11 #include <netpacket/packet.h> |
| 12 #include <sys/socket.h> |
| 13 #include <sys/types.h> |
| 14 |
| 15 #include <algorithm> |
| 16 |
| 17 #include "base/logging.h" |
| 18 #include "base/strings/string_number_conversions.h" |
| 19 #include "chrome/browser/media/router/discovery/discovery_network_list_wifi.h" |
| 20 #include "net/base/net_errors.h" |
| 21 |
| 22 namespace { |
| 23 |
| 24 void GetDiscoveryNetworkInfoListImpl( |
| 25 const struct ifaddrs* if_list, |
| 26 std::vector<DiscoveryNetworkInfo>* network_info_list) { |
| 27 std::string ssid; |
| 28 for (; if_list != NULL; if_list = if_list->ifa_next) { |
| 29 if ((if_list->ifa_flags & IFF_RUNNING) == 0 || |
| 30 (if_list->ifa_flags & IFF_UP) == 0) { |
| 31 continue; |
| 32 } |
| 33 |
| 34 const struct sockaddr* addr = if_list->ifa_addr; |
| 35 if (addr->sa_family != AF_PACKET) { |
| 36 continue; |
| 37 } |
| 38 std::string name(if_list->ifa_name); |
| 39 if (name.size() == 0) { |
| 40 continue; |
| 41 } |
| 42 |
| 43 // |addr| will always be sockaddr_ll when |sa_family| == AF_PACKET. |
| 44 const struct sockaddr_ll* ll_addr = |
| 45 reinterpret_cast<const struct sockaddr_ll*>(addr); |
| 46 // ARPHRD_ETHER is used to test for Ethernet, as in IEEE 802.3 MAC protocol. |
| 47 // This spec is used by both wired Ethernet and wireless (e.g. 802.11). |
| 48 if (ll_addr->sll_hatype != ARPHRD_ETHER) { |
| 49 continue; |
| 50 } |
| 51 |
| 52 if (MaybeGetWifiSSID(name, &ssid)) { |
| 53 network_info_list->push_back({name, ssid}); |
| 54 continue; |
| 55 } |
| 56 |
| 57 if (ll_addr->sll_halen == 0) { |
| 58 continue; |
| 59 } |
| 60 |
| 61 network_info_list->push_back( |
| 62 {name, base::HexEncode(ll_addr->sll_addr, ll_addr->sll_halen)}); |
| 63 } |
| 64 } |
| 65 |
| 66 } // namespace |
| 67 |
| 68 std::vector<DiscoveryNetworkInfo> GetDiscoveryNetworkInfoList() { |
| 69 std::vector<DiscoveryNetworkInfo> network_ids; |
| 70 |
| 71 struct ifaddrs* if_list; |
| 72 if (getifaddrs(&if_list)) { |
| 73 DVLOG(2) << "getifaddrs() error: " << net::ErrorToString(errno); |
| 74 return network_ids; |
| 75 } |
| 76 |
| 77 GetDiscoveryNetworkInfoListImpl(if_list, &network_ids); |
| 78 std::stable_sort( |
| 79 network_ids.begin(), network_ids.end(), |
| 80 [](const DiscoveryNetworkInfo& info1, const DiscoveryNetworkInfo& info2) { |
| 81 return info1.network_id < info2.network_id; |
| 82 }); |
| 83 freeifaddrs(if_list); |
| 84 return network_ids; |
| 85 } |
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