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      1 /*
      2  * libjingle
      3  * Copyright 2011, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "talk/base/basicpacketsocketfactory.h"
     29 
     30 #include "talk/base/asyncudpsocket.h"
     31 #include "talk/base/asynctcpsocket.h"
     32 #include "talk/base/logging.h"
     33 #include "talk/base/socketadapters.h"
     34 #include "talk/base/thread.h"
     35 
     36 namespace talk_base {
     37 
     38 BasicPacketSocketFactory::BasicPacketSocketFactory(
     39     Thread* thread)
     40     : thread_(thread),
     41       socket_factory_(NULL) {
     42 }
     43 
     44 BasicPacketSocketFactory::BasicPacketSocketFactory(
     45     SocketFactory* socket_factory)
     46     : thread_(NULL),
     47       socket_factory_(socket_factory) {
     48 }
     49 
     50 BasicPacketSocketFactory::~BasicPacketSocketFactory() {
     51 }
     52 
     53 AsyncPacketSocket* BasicPacketSocketFactory::CreateUdpSocket(
     54     const SocketAddress& address, int min_port, int max_port) {
     55   // UDP sockets are simple.
     56   talk_base::AsyncSocket* socket =
     57       socket_factory()->CreateAsyncSocket(SOCK_DGRAM);
     58   if (!socket) {
     59     return NULL;
     60   }
     61   if (BindSocket(socket, address, min_port, max_port) < 0) {
     62     LOG(LS_ERROR) << "UDP bind failed with error "
     63                     << socket->GetError();
     64     delete socket;
     65     return NULL;
     66   }
     67   return new talk_base::AsyncUDPSocket(socket);
     68 }
     69 
     70 AsyncPacketSocket* BasicPacketSocketFactory::CreateServerTcpSocket(
     71     const SocketAddress& local_address, int min_port, int max_port,
     72     bool listen, bool ssl) {
     73   talk_base::AsyncSocket* socket =
     74       socket_factory()->CreateAsyncSocket(SOCK_STREAM);
     75   if (!socket) {
     76     return NULL;
     77   }
     78 
     79   if (BindSocket(socket, local_address, min_port, max_port) < 0) {
     80     LOG(LS_ERROR) << "TCP bind failed with error "
     81                   << socket->GetError();
     82     delete socket;
     83     return NULL;
     84   }
     85 
     86   // If using SSLTCP, wrap the TCP socket in a pseudo-SSL socket.
     87   if (ssl) {
     88     socket = new talk_base::AsyncSSLSocket(socket);
     89   }
     90 
     91   return new talk_base::AsyncTCPSocket(socket, true);
     92 }
     93 
     94 AsyncPacketSocket* BasicPacketSocketFactory::CreateClientTcpSocket(
     95     const SocketAddress& local_address, const SocketAddress& remote_address,
     96     const ProxyInfo& proxy_info, const std::string& user_agent, bool ssl) {
     97   talk_base::AsyncSocket* socket =
     98       socket_factory()->CreateAsyncSocket(SOCK_STREAM);
     99   if (!socket) {
    100     return NULL;
    101   }
    102 
    103   if (BindSocket(socket, local_address, 0, 0) < 0) {
    104     LOG(LS_ERROR) << "TCP bind failed with error "
    105                   << socket->GetError();
    106     delete socket;
    107     return NULL;
    108   }
    109 
    110   // If using a proxy, wrap the socket in a proxy socket.
    111   if (proxy_info.type == talk_base::PROXY_SOCKS5) {
    112     socket = new talk_base::AsyncSocksProxySocket(
    113         socket, proxy_info.address, proxy_info.username, proxy_info.password);
    114   } else if (proxy_info.type == talk_base::PROXY_HTTPS) {
    115     socket = new talk_base::AsyncHttpsProxySocket(
    116         socket, user_agent, proxy_info.address,
    117         proxy_info.username, proxy_info.password);
    118   }
    119 
    120   // If using SSLTCP, wrap the TCP socket in a pseudo-SSL socket.
    121   if (ssl) {
    122     socket = new talk_base::AsyncSSLSocket(socket);
    123   }
    124 
    125   if (socket->Connect(remote_address) < 0) {
    126     LOG(LS_ERROR) << "TCP connect failed with error "
    127                   << socket->GetError();
    128     delete socket;
    129     return NULL;
    130   }
    131 
    132   // Finally, wrap that socket in a TCP packet socket.
    133   return new talk_base::AsyncTCPSocket(socket, false);
    134 }
    135 
    136 int BasicPacketSocketFactory::BindSocket(
    137     AsyncSocket* socket, const SocketAddress& local_address,
    138     int min_port, int max_port) {
    139   int ret = -1;
    140   if (min_port == 0 && max_port == 0) {
    141     // If there's no port range, let the OS pick a port for us.
    142     ret = socket->Bind(local_address);
    143   } else {
    144     // Otherwise, try to find a port in the provided range.
    145     for (int port = min_port; ret < 0 && port <= max_port; ++port) {
    146       ret = socket->Bind(talk_base::SocketAddress(local_address.ip(), port));
    147     }
    148   }
    149   return ret;
    150 }
    151 
    152 SocketFactory* BasicPacketSocketFactory::socket_factory() {
    153   if (thread_)
    154     return thread_->socketserver();
    155   else
    156     return socket_factory_;
    157 }
    158 
    159 }  // namespace talk_base
    160