OSX/libsecurity_utilities/lib/socks++.cpp

   1 /*
   2  * Copyright (c) 2000-2001,2004,2011,2014 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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  18  * Please see the License for the specific language governing rights and
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  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24
  25 //
  26 // socks - socks version of IP sockets
  27 //
  28 // [Also see comments in header file.]
  29 //
  30 // This file contains the "generic" Socks functionality.
  31 // Socks4 and Socks5 implementations are in their separate files.
  32 //
  33 #include "socks++.h"
  34 #include "socks++4.h"
  35 #include "socks++5.h"
  36 #include "hosts.h"
  37
  38
  39 namespace Security {
  40 namespace IPPlusPlus {
  41
  42
  43 //
  44 // Static objects
  45 //
  46 ModuleNexus<SocksServer::Global> SocksServer::global;
  47
  48
  49 //
  50 // SocksServer destruction
  51 //
  52 SocksServer::~SocksServer()
  53 { /* virtual */ }
  54
  55
  56 //
  57 // Create a SocksServer object
  58 //
  59 SocksServer *SocksServer::make(Version version, const IPSockAddress &addr)
  60 {
  61     switch (version) {
  62     case 0:
  63         return NULL;            // no socks
  64     case 4:
  65         return new Socks4::Server(addr);
  66     case 5:
  67         return new Socks5::Server(addr);
  68     default:
  69         UnixError::throwMe(EINVAL);
  70     }
  71 }
  72
  73
  74 //
  75 // TCPClientSockets (CONNECT access)
  76 //
  77 void SocksClientSocket::open(const IPSockAddress &peer)
  78 {
  79     if (mServer) {
  80         Support::connect(*this, peer);
  81         lastConnected(mPeerAddress.address());
  82     } else {
  83         TCPClientSocket::open(peer);
  84     }
  85 }
  86
  87 void SocksClientSocket::open(const IPAddress &addr, IPPort port)
  88 {
  89     open(IPSockAddress(addr, port));
  90 }
  91
  92 void SocksClientSocket::open(const Host &host, IPPort port)
  93 {
  94     if (mServer) {
  95         Support::connect(*this, host, port);
  96         lastConnected(mPeerAddress.address());
  97     } else {
  98         TCPClientSocket::open(host, port);
  99     }
 100 }
 101
 102 void SocksClientSocket::setFd(int fd, const IPSockAddress &local, const IPSockAddress &peer)
 103 {
 104     Socket::setFd(fd);
 105     mLocalAddress = local;
 106     mPeerAddress = peer;
 107 }
 108
 109
 110 //
 111 // TCPServerSockets (BIND access)
 112 //
 113 void SocksServerSocket::open(const IPSockAddress &local, int)
 114 {
 115     if (mServer) {
 116 #if BUG_GCC
 117         if (mConnectionPeer)
 118             Support::bind(*this, mConnectionPeer, local.port());
 119         else
 120             Support::bind(*this, lastConnected(), local.port());
 121 #else
 122         Support::bind(*this,
 123             mConnectionPeer ? mConnectionPeer : lastConnected(),
 124             local.port());
 125 #endif
 126     } else {
 127         TCPServerSocket::open(local, 1);
 128     }
 129 }
 130
 131 void SocksServerSocket::receive(SocksClientSocket &client)
 132 {
 133     if (mServer) {
 134         Support::receive(*this, client);
 135     } else {
 136         TCPServerSocket::receive(client);
 137     }
 138 }
 139
 140
 141 //
 142 // Address functions
 143 //
 144 IPSockAddress SocksServer::Support::localAddress(const Socket &me) const
 145 {
 146     if (mServer)
 147         return mLocalAddress;
 148     else
 149         return me.localAddress();
 150 }
 151
 152 IPSockAddress SocksServer::Support::peerAddress(const Socket &me) const
 153 {
 154     if (mServer)
 155         return mPeerAddress;
 156     else
 157         return me.peerAddress();
 158 }
 159
 160
 161 }       // end namespace IPPlusPlus
 162 }       // end namespace Security