Wireless.cc

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#include "Wireless.h"
#include "Socket.h"
#include <cstring>
#include <cstdio>
#include "Shared/ProjectInterface.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <net/if.h>

#include "SocketListener.h"

Wireless *wireless=NULL;

#ifdef PLATFORM_APERIOS
#  include <OPENR/OSyslog.h>
#  include <OPENR/OPENRAPI.h>
#  include <ant.h>
#  include <EndpointTypes.h>
#  include <TCPEndpointMsg.h>
#  include <UDPEndpointMsg.h>
#  include "aperios/MMCombo/entry.h"

using namespace std;

Wireless::Wireless ()
  : ipstackRef(), myOID(), freeSockets(), usedSockets(), usedSocketsInvalidated(false)
{
  ipstackRef = antStackRef("IPStack");
  WhoAmI(&myOID);

  sockets[0]=new DummySocket(0);
  for (int sock = 1; sock < WIRELESS_MAX_SOCKETS; sock++) {
    sockets[sock]=NULL;
    freeSockets.push_back(sock);
  }
}

Wireless::~Wireless ()
{
  if(usedSockets.size()>0) {
    cerr << "WARNING: Wireless deleted with open Sockets" << endl;
    for(list<int>::const_iterator it=usedSockets.begin(); it!=usedSockets.end(); ++it) {
      delete sockets[*it];
      sockets[*it]=NULL;
    }
    freeSockets.insert(freeSockets.end(),usedSockets.begin(),usedSockets.end());
    usedSockets.clear();
    usedSocketsInvalidated=true;
  }
}

Socket* Wireless::socket(Socket::TransportType_t ttype)
{
  return socket(ttype, WIRELESS_DEF_RECV_SIZE, WIRELESS_DEF_SEND_SIZE);
}

Socket* Wireless::socket(Socket::TransportType_t ttype, int recvsize, int sendsize)
{
  if (freeSockets.empty()
      || (recvsize + sendsize) <= 256) return sockets[0];
  int sock_num=freeSockets.front();
  freeSockets.pop_front();
  usedSockets.push_back(sock_num);
  usedSocketsInvalidated=true;

  sockets[sock_num]=new Socket(sock_num);
  sockets[sock_num]->sendBufSize=sendsize;
  sockets[sock_num]->recvBufSize=recvsize;
  sockets[sock_num]->setTransport(ttype);

  // setup send buffer
  antEnvCreateSharedBufferMsg sendBufferMsg(sendsize*2);
  sendBufferMsg.Call(ipstackRef, sizeof(sendBufferMsg));
  if (sendBufferMsg.error != ANT_SUCCESS) return sockets[0];

  sockets[sock_num]->sendBuffer = sendBufferMsg.buffer;
  sockets[sock_num]->sendBuffer.Map();
  sockets[sock_num]->sendData = ( byte * ) ( sockets[sock_num]->sendBuffer.GetAddress() );

  // setup receive buffer
  antEnvCreateSharedBufferMsg recvBufferMsg(recvsize*2);
  recvBufferMsg.Call(ipstackRef, sizeof(recvBufferMsg));
  if (recvBufferMsg.error != ANT_SUCCESS) return sockets[0];

  sockets[sock_num]->recvBuffer = recvBufferMsg.buffer;
  sockets[sock_num]->recvBuffer.Map();
  sockets[sock_num]->recvData = ( byte * ) ( sockets[sock_num]->recvBuffer.GetAddress() );

  sockets[sock_num]->readData = sockets[sock_num]->recvData + recvsize;
  sockets[sock_num]->writeData = sockets[sock_num]->sendData + sendsize;

  return sockets[sock_num];
}

int Wireless::listen(int sock, int port)
{
  if ( port <= 0 || port >= 65535 || sock <= 0 || sock >= WIRELESS_MAX_SOCKETS || sockets[sock] == NULL
       || sockets[sock]->state != Socket::CONNECTION_CLOSED )return -1;

  sockets[sock]->server_port = port;
  sockets[sock]->init();

  if (sockets[sock]->trType==Socket::SOCK_STREAM) {
    // create endpoint
    antEnvCreateEndpointMsg tcpCreateMsg( EndpointType_TCP, ( sockets[sock]->recvBufSize + sockets[sock]->sendBufSize ) * 3 );
    tcpCreateMsg.Call( ipstackRef, sizeof( tcpCreateMsg ) );
    if ( tcpCreateMsg.error != ANT_SUCCESS ) return -1;
    sockets[sock]->endpoint = tcpCreateMsg.moduleRef;

    // listen
    TCPEndpointListenMsg listenMsg( sockets[sock]->endpoint, IP_ADDR_ANY, port );
    listenMsg.continuation = ( void * ) sock;

    listenMsg.Send( ipstackRef, myOID, Extra_Entry[entryListenCont], sizeof( listenMsg ) );

    sockets[sock]->state = Socket::CONNECTION_LISTENING;
    return 0;
  } else if (sockets[sock]->trType==Socket::SOCK_DGRAM) {
    // create endpoint
    antEnvCreateEndpointMsg udpCreateMsg( EndpointType_UDP, ( sockets[sock]->recvBufSize + sockets[sock]->sendBufSize ) * 3 );
    udpCreateMsg.Call( ipstackRef, sizeof( udpCreateMsg ) );
    if ( udpCreateMsg.error != ANT_SUCCESS ) return -1;

    // bind socket
    sockets[sock]->endpoint = udpCreateMsg.moduleRef;
    UDPEndpointBindMsg bindMsg( sockets[sock]->endpoint, IP_ADDR_ANY, port );
    bindMsg.Call( ipstackRef, sizeof( bindMsg ) );
    bindMsg.continuation = ( void * ) sock;

    sockets[sock]->state = Socket::CONNECTION_CONNECTING;

    receive( sock );

    return 0;

  }

  else
    return -1;
}

/** Tell the ipstack we want to recieve messages with this function. */

int Wireless::connect( int sock, const char * ipaddr, int port )
{
  if ( port <= 0 || port >= 65535 || sock <= 0 || sock >= WIRELESS_MAX_SOCKETS || sockets[sock] == NULL
       || ( sockets[sock]->trType == Socket::SOCK_STREAM && sockets[sock]->state != Socket::CONNECTION_CLOSED ) ) return -1;

  sockets[sock]->init();
  if (sockets[sock]->trType==Socket::SOCK_STREAM) {
    // create endpoint
    antEnvCreateEndpointMsg tcpCreateMsg( EndpointType_TCP, ( sockets[sock]->recvBufSize + sockets[sock]->sendBufSize ) * 3 );
    tcpCreateMsg.Call( ipstackRef, sizeof( tcpCreateMsg ) );
    if ( tcpCreateMsg.error != ANT_SUCCESS ) return -1;
    sockets[sock]->endpoint = tcpCreateMsg.moduleRef;

    // connect
    TCPEndpointConnectMsg connectMsg( sockets[sock]->endpoint, IP_ADDR_ANY, IP_PORT_ANY, ipaddr, port );
    connectMsg.continuation = ( void * ) sock;

    connectMsg.Send( ipstackRef, myOID, Extra_Entry[entryConnectCont], sizeof( connectMsg ) );
    sockets[sock]->peer_addr=connectMsg.fAddress.Address();
    sockets[sock]->peer_port=connectMsg.fPort;

    sockets[sock]->state = Socket::CONNECTION_CONNECTING;
    return 0;
  }

  else if ( sockets[sock]->trType == Socket::SOCK_DGRAM )
    {
      // connect
      UDPEndpointConnectMsg connectMsg( sockets[sock]->endpoint, ipaddr, port );

      connectMsg.continuation = ( void * ) sock;

      connectMsg.Send( ipstackRef, myOID, Extra_Entry[entryConnectCont], sizeof( connectMsg ) );
      sockets[sock]->peer_addr=connectMsg.address.Address();
      sockets[sock]->peer_port=connectMsg.port;

      sockets[sock]->state = Socket::CONNECTION_CONNECTED;
      //std::cout << "Sock " << sock << " connected via UDP to IP " << ipaddr << " port " << port << std::flush << std::endl;

      return 0;
    }

  else
    {
      return -1;
    }
}

void
Wireless::ListenCont(void* msg)
{
try {
  antEnvMsg * Msg = ( antEnvMsg * ) msg;
  int sock = ( int )( Msg->continuation );

  if ( sockets[sock]->trType == Socket::SOCK_STREAM )
    {
      TCPEndpointListenMsg * listenMsg = ( TCPEndpointListenMsg * ) antEnvMsg::Receive( msg );

      if ( listenMsg->error != TCP_SUCCESS )
        {
          sockets[sock]->state = Socket::CONNECTION_ERROR;

          // no use recycling since its a resource issue
          return;
        }
      sockets[sock]->peer_addr=listenMsg->fAddress.Address();
      sockets[sock]->peer_port=listenMsg->fPort;

      sockets[sock]->state = Socket::CONNECTION_CONNECTED;
      //sockets[sock]->local_ipaddr = listenMsg->lAddress.Address();
      //cout << "Listen set lip: " << local_ipaddr << endl;
      receive( sock );
    }

} catch(const std::exception& ex) {
  if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during Wireless Listen callback",&ex))
    throw;
} catch(...) {
  if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during Wireless Listen callback",NULL))
    throw;
}
}

void
Wireless::ConnectCont(void *msg)
{
try {
  antEnvMsg * Msg = ( antEnvMsg * ) msg;
  int sock = ( int )( Msg->continuation );

  if ( sockets[sock]->trType == Socket::SOCK_STREAM )
    {
      TCPEndpointConnectMsg * connectMsg = ( TCPEndpointConnectMsg * ) antEnvMsg::Receive( msg );
      if ( connectMsg->error != TCP_SUCCESS )
        {
          sockets[sock]->state = Socket::CONNECTION_ERROR;
          return;
        }

      sockets[sock]->state = Socket::CONNECTION_CONNECTED;
      //sockets[sock]->local_ipaddr = connectMsg->lAddress.Address();
      //cout << "Connect set lip: " << local_ipaddr << endl;
      receive( sock );
    }

} catch(const std::exception& ex) {
  if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during Wireless Connect callback",&ex))
    throw;
} catch(...) {
  if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during Wireless Connect callback",NULL))
    throw;
}
}

void
Wireless::BindCont(void *msg)
{
try {
  UDPEndpointBindMsg* bindMsg = (UDPEndpointBindMsg*) antEnvMsg::Receive( msg );
  int sock = (int)bindMsg->continuation;

  if (bindMsg->error != UDP_SUCCESS) {
    sockets[sock]->state = Socket::CONNECTION_ERROR;
    return;
  }

  sockets[sock]->state = Socket::CONNECTION_CONNECTED;
  /*  if(bindMsg->address.Address()!=0) {
    //sockets[sock]->local_ipaddr = bindMsg->address.Address();
    //cout << "Bind set lip: " << local_ipaddr << endl;
  } else {
    //cout << "Bind got 0" << endl;
    }*/

} catch(const std::exception& ex) {
  if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during Wireless Bind callback",&ex))
    throw;
} catch(...) {
  if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during Wireless Bind callback",NULL))
    throw;
}
}

void
Wireless::send(int sock)
{
  if ( sock <= 0 || sock >= WIRELESS_MAX_SOCKETS || sockets[sock] == NULL || sockets[sock]->state != Socket::CONNECTION_CONNECTED
       || sockets[sock]->sendSize <= 0 ) return;

  if ( sockets[sock]->trType == Socket::SOCK_STREAM )
    {
      TCPEndpointSendMsg sendMsg( sockets[sock]->endpoint, sockets[sock]->sendData, sockets[sock]->sendSize );
      sendMsg.continuation = ( void * ) sock;

      sockets[sock]->tx = true;
      sendMsg.Send( ipstackRef, myOID, Extra_Entry[entrySendCont], sizeof( TCPEndpointSendMsg ) );
      sockets[sock]->sendSize = 0;
    }

  else if ( sockets[sock]->trType == Socket::SOCK_DGRAM )
    {
      UDPEndpointSendMsg sendMsg( sockets[sock]->endpoint, sockets[sock]->sendData, sockets[sock]->sendSize );

      // this field is just hijacked to id the socket # this message is being sent across
      sendMsg.continuation = ( void * ) sock;

      sockets[sock]->tx = true;
      sendMsg.Send( ipstackRef, myOID, Extra_Entry[entrySendCont], sizeof( UDPEndpointSendMsg ) );
      sockets[sock]->sendSize = 0;
    }
}

void
Wireless::SendCont(void* msg)
{
try {
  antEnvMsg * Msg = ( antEnvMsg * ) msg;
  int sock = ( int )( Msg->continuation );

  if ( sockets[sock]->trType == Socket::SOCK_STREAM )
    {
      TCPEndpointSendMsg * sendMsg = ( TCPEndpointSendMsg * ) antEnvMsg::Receive( msg );
      sockets[sock]->tx = false;
      if ( sendMsg->error != TCP_SUCCESS )
        {
          sockets[sock]->state = Socket::CONNECTION_ERROR;
          close( sock );
          return;
        }
    }

  else if ( sockets[sock]->trType == Socket::SOCK_DGRAM )
    {
      UDPEndpointSendMsg * sendMsg = ( UDPEndpointSendMsg * ) antEnvMsg::Receive( msg );
      sockets[sock]->tx = false;
      if ( sendMsg->error != UDP_SUCCESS )
        {
          sockets[sock]->state = Socket::CONNECTION_ERROR;
          close( sock );
          return;
        }
    }

  sockets[sock]->flush();

} catch(const std::exception& ex) {
  if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during Wireless Send callback",&ex))
    throw;
} catch(...) {
  if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during Wireless Send callback",NULL))
    throw;
}
}

/*! @bug This doesn't actually seem to block until the message is
* fully sent... a crash immediately after this will still cause a
* line or two to be dropped.  This is still less dropped than
* regular send, but doesn't do much good for debugging until we fix
* this. (if we can...) */
void
Wireless::blockingSend(int sock)
{
  if ( sock <= 0 || sock >= WIRELESS_MAX_SOCKETS || sockets[sock] == NULL || sockets[sock]->state != Socket::CONNECTION_CONNECTED
       || sockets[sock]->sendSize <= 0 ) return;

  if ( sockets[sock]->trType == Socket::SOCK_STREAM )
    {
      TCPEndpointSendMsg sendMsg( sockets[sock]->endpoint, sockets[sock]->sendData, sockets[sock]->sendSize );
      sendMsg.continuation = ( void * ) sock;

      sockets[sock]->tx=true;
      sockets[sock]->sendSize = 0;
      sendMsg.Call( ipstackRef, sizeof( TCPEndpointSendMsg ) );
      sockets[sock]->tx = false;
    }

  // no double buffering
}

void
Wireless::setReceiver(int sock, int (*rcvcbckfn) (char*, int) )
{
  if (sock<=0 || sock>=WIRELESS_MAX_SOCKETS || sockets[sock]==NULL) return;

  sockets[sock]->rcvcbckfn=rcvcbckfn;
}

void Wireless::setReceiver(int sock, SocketListener *listener) {
  if (sock <= 0 || sock >= WIRELESS_MAX_SOCKETS || sockets[sock] == NULL)
    return;

  sockets[sock]->sckListener = listener;
}

void
Wireless::receive(int sock)
{
  if ( sock <= 0 || sock >= WIRELESS_MAX_SOCKETS || sockets[sock] == NULL
       || ( sockets[sock]->trType == Socket::SOCK_STREAM && sockets[sock]->state != Socket::CONNECTION_CONNECTED ) )
    return;

  if ( sockets[sock]->trType == Socket::SOCK_STREAM )
    {
      TCPEndpointReceiveMsg receiveMsg( sockets[sock]->endpoint, sockets[sock]->recvData, 1, sockets[sock]->recvBufSize );
      receiveMsg.continuation = ( void * ) sock;
      receiveMsg.Send( ipstackRef, myOID, Extra_Entry[entryReceiveCont], sizeof( receiveMsg ) );
    }

  else if ( sockets[sock]->trType == Socket::SOCK_DGRAM )
    {
      UDPEndpointReceiveMsg receiveMsg( sockets[sock]->endpoint, sockets[sock]->recvData, sockets[sock]->recvBufSize );
      receiveMsg.continuation = ( void * ) sock;
      receiveMsg.Send( ipstackRef, myOID, Extra_Entry[entryReceiveCont], sizeof( receiveMsg ) );
    }

  sockets[sock]->rx = true;
}

void
Wireless::receive(int sock, int (*rcvcbckfn) (char*, int) )
{
  if (sock<=0 || sock>=WIRELESS_MAX_SOCKETS || sockets[sock]==NULL
      || sockets[sock]->state != Socket::CONNECTION_CONNECTED) return;

  sockets[sock]->rcvcbckfn = rcvcbckfn;

  if ( sockets[sock]->trType == Socket::SOCK_STREAM )
    {
      TCPEndpointReceiveMsg receiveMsg( sockets[sock]->endpoint, sockets[sock]->recvData, 1, sockets[sock]->recvBufSize );
      receiveMsg.continuation = ( void * ) sock;
      receiveMsg.Send( ipstackRef, myOID, Extra_Entry[entryReceiveCont], sizeof( receiveMsg ) );
    }

  else if ( sockets[sock]->trType == Socket::SOCK_DGRAM )
    {
      UDPEndpointReceiveMsg receiveMsg( sockets[sock]->endpoint, sockets[sock]->recvData, sockets[sock]->recvBufSize );
      receiveMsg.continuation = ( void * ) sock;
      receiveMsg.Send( ipstackRef, myOID, Extra_Entry[entryReceiveCont], sizeof( receiveMsg ) );
    }

  sockets[sock]->rx = true;
}

void
Wireless::ReceiveCont(void* msg)
{
try {
  // get the socket index before casting the message into UDP or TCP form
  antEnvMsg * Msg = ( antEnvMsg * ) msg;
  int sock = ( int )( Msg->continuation );

  if ( sock <= 0 || sock >= WIRELESS_MAX_SOCKETS || sockets[sock] == NULL
       || ( sockets[sock]->state != Socket::CONNECTION_CONNECTED && sockets[sock]->state != Socket::CONNECTION_CONNECTING ) )
    return;

  if ( sockets[sock]->trType == Socket::SOCK_STREAM )
    {
      TCPEndpointReceiveMsg * receiveMsg = ( TCPEndpointReceiveMsg * ) antEnvMsg::Receive( msg );
      if ( receiveMsg->error != TCP_SUCCESS )
        {
          sockets[sock]->state = Socket::CONNECTION_ERROR;
          close( sock );
          return;
        }

      sockets[sock]->recvSize = receiveMsg->sizeMin;

      if (sockets[sock]->sckListener != NULL) {
        sockets[sock]->sckListener->processData((char *)sockets[sock]->recvData,
                            sockets[sock]->recvSize);

      } else if (sockets[sock]->rcvcbckfn != NULL) {
        sockets[sock]->rcvcbckfn((char *)sockets[sock]->recvData,
                     sockets[sock]->recvSize);
      }
      sockets[sock]->recvSize = 0;

    }

  else if ( sockets[sock]->trType == Socket::SOCK_DGRAM )
    {
      UDPEndpointReceiveMsg * receiveMsg;
      receiveMsg = ( UDPEndpointReceiveMsg * ) antEnvMsg::Receive( msg );
      sockets[sock]->recvSize = receiveMsg->size;

      if ( receiveMsg->error == UDP_SUCCESS )
        {
          // if this UDP connection is not connected yet, connect it
          // to the address & port of the computer that sent this message.
          // This allows us to send UDP messages to any address instead of
          // hard-coding a specific address beforehand

          sockets[sock]->peer_addr=receiveMsg->address.Address();
          sockets[sock]->peer_port=receiveMsg->port;
          if ( !strncmp( "connection request", ( char * ) sockets[sock]->recvData, 18 ) ) {
            // clear this message from the receiving buffer
            sockets[sock]->recvData += sockets[sock]->recvSize;

            if ( sockets[sock]->state != Socket::CONNECTION_CONNECTED ) {
              char caller[14];
              receiveMsg->address.GetAsString( caller );
              connect( sock, caller, receiveMsg->port );
            }

          } else if (sockets[sock]->sckListener != NULL) {
            sockets[sock]->sckListener->processData((char *)sockets[sock]->recvData, sockets[sock]->recvSize);

          } else if ( sockets[sock]->rcvcbckfn != NULL )
            sockets[sock]->rcvcbckfn( ( char * ) sockets[sock]->recvData, sockets[sock]->recvSize );

        }

      sockets[sock]->recvSize = 0;

    }

  receive( sock );

} catch(const std::exception& ex) {
  if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during Wireless Receive callback",&ex))
    throw;
} catch(...) {
  if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during Wireless Receive callback",NULL))
    throw;
}
}

void
Wireless::close(int sock)
{
  if (sockets[sock]->state == Socket::CONNECTION_CLOSED ||
      sockets[sock]->state == Socket::CONNECTION_CLOSING) return;

  if (!(sockets[sock]->server_port>0 && sockets[sock]->daemon)) {
    sockets[sock]->recvBuffer.UnMap();
    antEnvDestroySharedBufferMsg receiveBufferMsg(sockets[sock]->recvBuffer);
    receiveBufferMsg.Call(ipstackRef, sizeof(antEnvDestroySharedBufferMsg));
    sockets[sock]->sendBuffer.UnMap();
    antEnvDestroySharedBufferMsg sendBufferMsg(sockets[sock]->sendBuffer);
    sendBufferMsg.Call(ipstackRef, sizeof(antEnvDestroySharedBufferMsg));
  }

  if ( sockets[sock]->trType == Socket::SOCK_STREAM )
    {
      TCPEndpointCloseMsg closeMsg( sockets[sock]->endpoint );
      closeMsg.continuation = ( void * ) sock;
      closeMsg.Send( ipstackRef, myOID, Extra_Entry[entryCloseCont], sizeof( closeMsg ) );
    }

  else if ( sockets[sock]->trType == Socket::SOCK_DGRAM )
    {
      UDPEndpointCloseMsg closeMsg( sockets[sock]->endpoint );
      closeMsg.continuation = ( void * ) sock;
      closeMsg.Send( ipstackRef, myOID, Extra_Entry[entryCloseCont], sizeof( closeMsg ) );
    }

  sockets[sock]->peer_addr=sockets[sock]->peer_port=-1;

  sockets[sock]->state = Socket::CONNECTION_CLOSING;
}

uint32 Wireless::getIPAddress(unsigned int /*idx=0*/) {
  uint32 local_ipaddr = 0;
  //from OPEN-R sample ERA201D1Info:
  antEnvInitGetParamMsg getParamMsg("ETHER_IP");
  getParamMsg.Call(ipstackRef, sizeof(getParamMsg));
  if (getParamMsg.error == ANT_SUCCESS && getParamMsg.paramType == antEnv_InitParam_String) {
    //cout << "******** RECEIVED " << getParamMsg.value.str << endl;
    unsigned int i=0;
    for(int j=3; j>=0; j--) {
      unsigned int b=0;
      while(i<ANTENV_VALUE_LENGTH_MAX && getParamMsg.value.str[i]!='.' && getParamMsg.value.str[i]!='\0')
        b=b*10+(getParamMsg.value.str[i++]-'0');
      i++; //skip over '.'
      local_ipaddr+=b<<(j*8);
      //cout << j << ": " << b << ' ' << local_ipaddr << endl;
    }
  } else {
    OSYSLOG1((osyslogERROR,"getParamMsg.Call() FAILED %d", getParamMsg.error));
  }
  return local_ipaddr;
}

void
Wireless::CloseCont(void* msg)
{
try {
  antEnvMsg * closeMsg = ( antEnvMsg * ) antEnvMsg::Receive( msg );
  int sock = ( int )( closeMsg->continuation );
  if ( sockets[sock] == NULL )
    return;

  sockets[sock]->state = Socket::CONNECTION_CLOSED;
  sockets[sock]->peer_addr=sockets[sock]->peer_port=-1;
  if ( sockets[sock]->server_port > 0 && sockets[sock]->daemon )
    {
      // recycle if server
      listen( sock, sockets[sock]->server_port );
    }

  else
    {
      delete( sockets[sock] );
      sockets[sock] = NULL;
      freeSockets.push_back( sock );
      for(list<int>::iterator it=usedSockets.begin(); it!=usedSockets.end(); ++it)
        if(*it==sock) {
          usedSockets.erase(it);
          usedSocketsInvalidated=true;
          break;
        }
    }

} catch(const std::exception& ex) {
  if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during Wireless Close callback",&ex))
    throw;
} catch(...) {
  if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during Wireless Close callback",NULL))
    throw;
}
}

#else // PLATFORM_LOCAL
#  include "IPC/Thread.h"
#  include <sys/types.h>
#  include <sys/socket.h>
#  include <netinet/in.h>
#  include <netdb.h>
#  include <arpa/inet.h>
#  include <fcntl.h>
#  include <unistd.h>
#  include <iostream>
#  include <errno.h>
#  include "Shared/MarkScope.h"

using namespace std;


Wireless::Wireless ()
  : callbackLock(NULL), interruptChk(-1), interruptCtl(-1), rfds(), wfds(), efds(), fdsMax(0), freeSockets(), usedSockets(), usedSocketsInvalidated(false)
{
  sockets[0]=new DummySocket(0);
  for (int sock = 1; sock < WIRELESS_MAX_SOCKETS; sock++) {
    sockets[sock]=NULL;
    freeSockets.push_back(sock);
  }
  int p[2];
  pipe(p);
  interruptChk=p[0];
  interruptCtl=p[1];
  fdsMax=interruptChk;
  if( ::fcntl(interruptChk,F_SETFL,O_NONBLOCK) ==-1 ) {
    perror("Wireless::Wireless(): fcntl");
  }
  FD_ZERO(&rfds);
  FD_SET(interruptChk,&rfds);
  FD_ZERO(&wfds);
  FD_ZERO(&efds);
}

Wireless::~Wireless ()
{
  MarkScope l(getLock());
	::close(interruptChk);
	::close(interruptCtl);
  interruptChk=interruptCtl=-1;
  if(usedSockets.size()>0) {
    cerr << "WARNING: Wireless deleted with open Sockets" << endl;
    for(list<int>::const_iterator it=usedSockets.begin(); it!=usedSockets.end(); ++it) {
      delete sockets[*it];
      sockets[*it]=NULL;
    }
    freeSockets.insert(freeSockets.end(),usedSockets.begin(),usedSockets.end());
    usedSockets.clear();
    usedSocketsInvalidated=true;
  }
  delete sockets[0]; // DummySocket
}

void Wireless::setReceiver(int sock, int (*rcvcbckfn) (char*, int) ) {
  sockets[sock]->rcvcbckfn=rcvcbckfn;
}

void Wireless::setReceiver(int sock, SocketListener *listener) {
  sockets[sock]->sckListener = listener;
}

void Wireless::close(int sock) {
  MarkScope l(getLock());
  if ( sock <= 0 || sock >= WIRELESS_MAX_SOCKETS || sockets[sock] == NULL)
    return;
  sockets[sock]->flush();
  sockets[sock]->peer_port = sockets[sock]->peer_addr = -1;
  if(sockets[sock]->daemon) {
    sockets[sock]->init();
    listen(sock,sockets[sock]->server_port);
  } else {
    bool found=false;
    for(list<int>::iterator it=usedSockets.begin(); it!=usedSockets.end(); ++it) {
      if(*it==sock) {
        usedSockets.erase(it);
        found = usedSocketsInvalidated = true;
        break;
      }
    }
    if(!found) {
      cerr << "WARNING: Could not find socket " << sock << " in usedSockets list of size " << usedSockets.size() << endl;
      return;
    }
    Socket * s=sockets[sock];
    sockets[sock] = NULL; //we don't delete the socket here -- wakeup() will cause pollProcess to do that
    wakeup(s); //avoid select giving error about bad FD
    freeSockets.push_back( sock );
  }
}

int Wireless::connect(int sock, const char* ipaddr, int port) {
  MarkScope l(getLock());
  if ( port <= 0 || port >= 65535 || sock <= 0 || sock >= WIRELESS_MAX_SOCKETS
       || sockets[sock] == NULL || (sockets[sock]->state != Socket::CONNECTION_CLOSED && sockets[sock]->trType!=Socket::SOCK_DGRAM) )
    return -1;

  if(sockets[sock]->endpoint==-1)
    sockets[sock]->init();
  int endpoint=sockets[sock]->endpoint;

  sockaddr_in m_addr;
  m_addr.sin_family = AF_INET;
  m_addr.sin_port = htons ( port );
  struct hostent* hostips = gethostbyname(ipaddr);
  if ( hostips==NULL) {
    cerr << "Wireless::connect(): gethostbyname returned NULL, h_errno==" << h_errno;
    switch(h_errno) {
    case HOST_NOT_FOUND: cerr << " (HOST_NOT_FOUND)" << endl; break;
    case NO_ADDRESS: cerr << " (NO_ADDRESS)" << endl; break;
      //case NO_DATA: cerr << " (NO_DATA)" << endl; break; //NO_DATA==NO_ADDRESS
    case NO_RECOVERY: cerr << " (NO_RECOVERY)" << endl; break;
    case TRY_AGAIN: cerr << " (TRY_AGAIN)" << endl; break;
    default: cerr << " (unknown error code!)" << endl; break;
    }
    return -1;
  }
  memcpy(&m_addr.sin_addr,hostips->h_addr_list[0],sizeof(m_addr.sin_addr));

  int status = ::connect ( endpoint, ( sockaddr * ) &m_addr, sizeof ( m_addr ) );
  if ( status == 0 )
    sockets[sock]->state=Socket::CONNECTION_CONNECTED;
  else if(errno==EINPROGRESS)
    sockets[sock]->state=Socket::CONNECTION_CONNECTING;
  else {
    perror("Wireless::connect(): connect");
    return -1;
  }
  sockets[sock]->peer_port = port;
  sockets[sock]->peer_addr = ntohl(m_addr.sin_addr.s_addr);
  //cout << "connecting " << sockets[sock]->getPeerAddressAsString() << ' ' << sockets[sock]->getPeerPort() << "... " <<status << endl;
  //this will allow sock to be added to wfds so we can tell when the connection goes through
  wakeup();
  return 0;
}

int Wireless::listen(int sock, int port) {
  MarkScope l(getLock());
  if ( port <= 0 || port >= 65535 || sock <= 0 || sock >= WIRELESS_MAX_SOCKETS
       || sockets[sock] == NULL || sockets[sock]->state != Socket::CONNECTION_CLOSED )
    return -1;
  sockets[sock]->server_port = port;
  sockets[sock]->init();
  int endpoint=sockets[sock]->endpoint;
  if ( endpoint<0 )
  return -1;
  sockaddr_in m_addr;
  m_addr.sin_family = AF_INET;
  m_addr.sin_addr.s_addr = INADDR_ANY;
  m_addr.sin_port = htons ( port );

  int bind_return = ::bind ( endpoint,( struct sockaddr * ) &m_addr,sizeof ( m_addr ) );
  if ( bind_return == -1 ) {
    perror("Wireless::listen: bind");
    return -1;
  }
  if(sockets[sock]->trType==Socket::SOCK_STREAM) {
    int listen_return = ::listen ( endpoint, MAXCONNECTIONS );
    if ( listen_return == -1 ) {
      perror("Wireless::listen: listen");
      return -1;
    }
  }
  sockets[sock]->state = Socket::CONNECTION_LISTENING;
  //this will allow sock to be added to rfds so we can tell when a connection is available
  wakeup();
  return 0;
}

Socket* Wireless::socket(Socket::TransportType_t ttype) {
  return socket(ttype, WIRELESS_DEF_RECV_SIZE, WIRELESS_DEF_SEND_SIZE);
}
Socket* Wireless::socket(Socket::TransportType_t ttype, int recvsize, int sendsize) {
  MarkScope l(getLock());
  if (freeSockets.empty()
      || (recvsize + sendsize) <= 256) return sockets[0];
  int sock_num=freeSockets.front();
  freeSockets.pop_front();
  usedSockets.push_back(sock_num);
  usedSocketsInvalidated=true;

  sockets[sock_num]=new Socket(sock_num);

  sockets[sock_num]->sendBufSize=sendsize;
  sockets[sock_num]->sendBuffer=new char[sockets[sock_num]->sendBufSize*2];
  //double buffered sending
  sockets[sock_num]->sendData=(byte*)sockets[sock_num]->sendBuffer;
  sockets[sock_num]->writeData=(byte*)sockets[sock_num]->sendBuffer+sockets[sock_num]->sendBufSize;

  sockets[sock_num]->recvBufSize=recvsize;
  sockets[sock_num]->recvBuffer = new char[sockets[sock_num]->recvBufSize];
  sockets[sock_num]->recvData=(byte*)sockets[sock_num]->recvBuffer; //reading is single buffered

  sockets[sock_num]->setTransport(ttype);

  return sockets[sock_num];
}

/*! There's probably better ways to implement this...
 *  (run through the interface list?  How does ifconfig do it?) */
uint32 Wireless::getIPAddress(unsigned int idx/*=0*/) {
  char buf[ 255 ];
  if(gethostname( buf, 255)!=0) {
    perror("Wireless::getIPAddress(): gethostname");
    return 0;
  }
  struct hostent * h = gethostbyname( buf );
  if(h==NULL) {
    herror("Wireless::getIPAddress(): gethostbyname");
    return 0;
  }
  //check to make sure 'idx' is valid
  for(unsigned int x=0; x<=idx; x++)
    if(h->h_addr_list[x]==NULL)
      return 0;
  //if we got here, it's valid
  return *(uint32*)h->h_addr_list[idx];
}

void
Wireless::send(int sock)
{
  MarkScope l(getLock());
  if ( sock <= 0 || sock >= WIRELESS_MAX_SOCKETS || sockets[sock] == NULL
      || sockets[sock]->state != Socket::CONNECTION_CONNECTED || sockets[sock]->sendSize <= 0 )
    return;

  //we could defer all sending to the poll, but let's give a shot at sending it out right away to reduce latency
  int s=sockets[sock]->endpoint;
  int sent=::send(s,sockets[sock]->sendData+sockets[sock]->sentSize,sockets[sock]->sendSize-sockets[sock]->sentSize,0);
  if(sent==-1) {
    if(errno==ECONNREFUSED) {
      close(sock);
    } else {
      perror("Wireless::send(): send");
      cerr << "Wireless::send() data size was " << sockets[sock]->sendSize-sockets[sock]->sentSize << endl;
      sockets[sock]->tx = false;
      sockets[sock]->sendSize = sockets[sock]->sentSize = 0;
    }
  } else {
    sockets[sock]->sentSize+=sent;
    if(sockets[sock]->sentSize==sockets[sock]->sendSize) {
      sockets[sock]->tx = false;
      sockets[sock]->sendSize = sockets[sock]->sentSize = 0;
      sockets[sock]->flush();
    } else {
      sockets[sock]->tx = true;
      //more work will be done in poll()
      //this will wake up the poll thread to make it check for pending writes (signaled by tx flag)
      wakeup();
    }
  }
}

void
Wireless::blockingSend(int sock)
{
  MarkScope l(getLock());
  if ( sock <= 0 || sock >= WIRELESS_MAX_SOCKETS || sockets[sock] == NULL
      || sockets[sock]->state != Socket::CONNECTION_CONNECTED || sockets[sock]->sendSize <= 0 )
    return;

  while(sockets[sock]->sentSize<sockets[sock]->sendSize) {
    fd_set bs_wfds;
    FD_ZERO(&bs_wfds);
    FD_SET(sockets[sock]->endpoint, &bs_wfds);
    int retval = select(sockets[sock]->endpoint+1, NULL, &bs_wfds, NULL, NULL);
    if(retval==0)
      continue;
    if(retval==-1) {
      perror("Wireless::poll(): select");
      return;
    }
    if(sockets[sock]->tx) //block on leftover non-blocking send
      continue;
    int sent=::send(sockets[sock]->endpoint,sockets[sock]->sendData+sockets[sock]->sentSize,sockets[sock]->sendSize-sockets[sock]->sentSize,0);
    if(sent==-1) {
      if(errno==EAGAIN) {
        cerr << "Wireless::blockingSend(): send() was not ready, even though select() said it was" << endl;
        continue;
      }
      perror("Wireless::blockingSend(): send");
      sockets[sock]->tx = false;
      sockets[sock]->sendSize = sockets[sock]->sentSize = 0;
      return;
    }
    sockets[sock]->sentSize+=sent;
  }
  sockets[sock]->sendSize = sockets[sock]->sentSize = 0;
}

void Wireless::pollSetup() {
  FD_ZERO(&rfds);
  FD_ZERO(&wfds);
  FD_ZERO(&efds);
  FD_SET(interruptChk, &rfds);

  fdsMax=interruptChk;
  MarkScope l(getLock());
  //cout << "pollSetup " << usedSockets.size() << endl;
  for(list<int>::const_iterator it=usedSockets.begin(); it!=usedSockets.end(); ++it) {
    if(sockets[*it]==NULL) {
      cerr << "ERROR: Wireless::pollSetup() encountered NULL socket " << *it << endl;
      continue;
    }
    if(sockets[*it]->endpoint==-1) {
      cerr << "ERROR Wireless::pollSetup() encountered bad endpoint " << *it << endl;
      continue;
    }
    if(sockets[*it]->state!=Socket::CONNECTION_CLOSED && sockets[*it]->state!=Socket::CONNECTION_ERROR)
      FD_SET(sockets[*it]->endpoint, &rfds);
    if(sockets[*it]->state==Socket::CONNECTION_CONNECTING || sockets[*it]->tx)
      FD_SET(sockets[*it]->endpoint, &wfds);
    FD_SET(sockets[*it]->endpoint, &efds);
    if(sockets[*it]->endpoint>fdsMax)
      fdsMax=sockets[*it]->endpoint;
  }
}

/*! @param tv  how long to wait -- NULL will wait indefinitely until a socket event occurs
 *  @return true if there was a socket event to process, false if timed out */
bool Wireless::pollTest(struct timeval* tv) {
  int retval = select(fdsMax+1, &rfds, &wfds, &efds, tv);
  if(retval==-1 && errno!=EINTR)
    perror("Wireless::pollTest(): select");
  return (retval!=0);
}

void Wireless::pollProcess() {
  MarkScope cl(getCallbackLock()); //note how this will go out of scope and release the lock if an exception occurs... sexy!
  MarkScope l(getLock());
  if(FD_ISSET(interruptChk,&rfds)) {
    //wakeup sent to handle non-blocking write
    int res=1;
    //cout << "Clearing interrupts..." << flush;
    while(res>0) {
      Socket * del=NULL;
      res=::read(interruptChk,&del,sizeof(del));
      //cout << ' ' << del << flush;
      if(del!=NULL)
        delete del;
    }
    //cout << " done" << endl;
  }
  usedSocketsInvalidated=false;
  for(list<int>::const_iterator it=usedSockets.begin(); it!=usedSockets.end(); ++it) {
    if(sockets[*it]==NULL) {
      cerr << "NULL socket " << *it << endl;
      continue;
    }
    if(sockets[*it]->endpoint==-1) {
      cerr << "bad endpoint " << *it << endl;
      continue;
    }
    int s=sockets[*it]->endpoint;
    if(FD_ISSET(s,&rfds)) {
      FD_CLR(s,&rfds); // in case we loop do to invalidated iterator during user callback
      //cout << *it << " set in read" << endl;
      if(sockets[*it]->state==Socket::CONNECTION_CONNECTING) {
        //cout << "Wireless::pollProcess(): read set on connecting" << endl;
        sockets[*it]->state=Socket::CONNECTION_CONNECTED;
      }
      if(sockets[*it]->state==Socket::CONNECTION_LISTENING) {
        if(sockets[*it]->trType==Socket::SOCK_STREAM) {
          sockaddr_in m_addr;
          socklen_t addrlen=sizeof(m_addr);
          int n=accept(s,(sockaddr*)&m_addr,&addrlen);
          if(n==-1) {
            if(errno!=EAGAIN) //EAGAIN indicates we were woken due to some other issue, like a previous close completing
              perror("Wireless::pollProcess(): accept");
            continue;
          }
          sockets[*it]->peer_addr=ntohl(m_addr.sin_addr.s_addr);
          sockets[*it]->peer_port=ntohs(m_addr.sin_port);
          //this closes the server socket -- we'll want to address this
          if(::close(s)==-1)
            perror("Wireless::pollProcess(): close");
          s=sockets[*it]->endpoint=n;
          sockets[*it]->state=Socket::CONNECTION_CONNECTED;
          //cout << "Accepted connection" << endl;
        } else {
          //cout << "UDP accept" << endl;
          sockaddr_in m_addr;
          socklen_t addrlen=sizeof(m_addr);
          sockets[*it]->recvSize = recvfrom(s,sockets[*it]->recvData,sockets[*it]->recvBufSize,0,(sockaddr*)&m_addr,&addrlen);
          if(sockets[*it]->recvSize==-1) {
            perror("Wireless::pollProcess(): acception recvfrom");
            continue;
          }
          /* //this can cause trouble for broadcasts... we'll make the user call 'connect' themselves if they want to send back
           //cout << "connecting..." << endl;
          int ret = ::connect ( s, (sockaddr*) &m_addr, sizeof ( m_addr ) );
          if ( ret==-1 && errno!=EINPROGRESS ) {
            perror("Wireless::pollProcess(): connect");
            continue;
          }
          //cout << "UDP accepted!" << endl;
          sockets[*it]->state=CONNECTION_CONNECTING;
           */
          sockets[*it]->peer_addr=ntohl(m_addr.sin_addr.s_addr);
          sockets[*it]->peer_port=ntohs(m_addr.sin_port);
          if(sockets[*it]->recvSize!=0) {
            //cout << "Read " << sockets[*it]->recvSize << " bytes " << sockets[*it]->rcvcbckfn << endl;
            if ( !strncmp( "connection request", ( char * ) sockets[*it]->recvData, 18 ) ) {
              // clear this message from the receiving buffer
              if ( sockets[*it]->state != Socket::CONNECTION_CONNECTED )
                connect( *it, sockets[*it]->getPeerAddressAsString().c_str(), sockets[*it]->getPeerPort() );
            } else if (sockets[*it]->sckListener != NULL) {
              try {
                sockets[*it]->sckListener->processData((char *)sockets[*it]->recvData,
                                     sockets[*it]->recvSize);
              } catch(const std::exception& ex) {
                if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during networking received data callback",&ex))
                  throw;
              } catch(...) {
                if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during networking received data callback",NULL))
                  throw;
              }
            } else if ( sockets[*it]->rcvcbckfn != NULL ) {
              try {
                sockets[*it]->rcvcbckfn( ( char * ) sockets[*it]->recvData, sockets[*it]->recvSize );
              } catch(const std::exception& ex) {
                if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during networking received data callback",&ex))
                  throw;
              } catch(...) {
                if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during networking received data callback",NULL))
                  throw;
              }
            }
            if(usedSocketsInvalidated) {
              pollProcess(); // iterator lost, restart processing (tail recursive loop)
              return;
            }
            sockets[*it]->recvSize = 0;
          }
        }
      } else if(sockets[*it]->state==Socket::CONNECTION_CONNECTED || sockets[*it]->state==Socket::CONNECTION_CLOSING) {
        sockets[*it]->recvSize = recvfrom(s,sockets[*it]->recvData,sockets[*it]->recvBufSize,0,NULL,NULL);
        if(sockets[*it]->recvSize==-1) {
          if(errno!=EAGAIN) { //may have just completed connection, not a problem
            if(errno==ECONNREFUSED || errno==ECONNRESET) {
              //cerr << "connection refused: endpoint=" << s << " sock=" << *it << " Socket=" << sockets[*it] << endl;
              list<int>::const_iterator tmp=it;
              //a UDP server could come in here if the client closes down (i.e. packet is refused)
              if(!sockets[*it]->daemon) //don't decrement if the socket is going to stay open
                --it;
              close(*tmp);
              continue;
            }
            perror("Wireless::pollProcess(): recvfrom");
          }
        } else if(sockets[*it]->recvSize==0) {
          list<int>::const_iterator tmp=it--;
          close(*tmp);
          //cout << "closed connection" << endl;
          continue;
        } else {
          // cout << "Read " << sockets[*it]->recvSize << " bytes " << sockets[*it]->rcvcbckfn << endl;
          if (sockets[*it]->sckListener != NULL) {
            try {
              sockets[*it]->sckListener->processData((char *)sockets[*it]->recvData,
                                     sockets[*it]->recvSize);
            } catch(const std::exception& ex) {
              if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during networking received data callback",&ex))
                throw;
            } catch(...) {
              if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during networking received data callback",NULL))
                throw;
            }
          } else if ( sockets[*it]->rcvcbckfn != NULL ) {
            try {
              sockets[*it]->rcvcbckfn( ( char * ) sockets[*it]->recvData, sockets[*it]->recvSize );
            } catch(const std::exception& ex) {
              if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during networking received data callback",&ex))
                throw;
            } catch(...) {
              if(!ProjectInterface::uncaughtException(__FILE__,__LINE__,"Occurred during networking received data callback",NULL))
                throw;
            }
          }
          if(usedSocketsInvalidated) {
            pollProcess(); // iterator lost, restart processing (tail recursive loop)
            return;
          }
          sockets[*it]->recvSize = 0;
        }
      } else {
        int dropped=0,n=0;
        char buf[100];
        while((n=recvfrom(s,buf,100,0,NULL,NULL))>0)
          dropped+=n;
        cerr << "Wireless::pollProcess(): socket (sys=" << s << ", tk="<<*it<<") read flag in bad state (" << sockets[*it]->state << "), " << dropped << " bytes were dropped, ending with:" << endl;
        for(int i=0; i<n; i++)
          if(isprint(buf[i]))
            cerr << buf[i];
          else
            cerr << '.';
        cerr << endl;
      }
    }
    if(FD_ISSET(s,&wfds)) {
      FD_CLR(s,&wfds); // in case we loop do to invalidated iterator during user callback
      //cout << *it << " set in write" << endl;
      if(sockets[*it]->state==Socket::CONNECTION_CONNECTING) {
        sockets[*it]->state=Socket::CONNECTION_CONNECTED;
      } else if(sockets[*it]->state==Socket::CONNECTION_CONNECTED) {
        if(!sockets[*it]->tx) {
          //cerr << "Wireless::pollProcess(): write available on non-tx socket??" << endl;
          //can happen on a refused connection
        } else {
          int sent=::send(s,sockets[*it]->sendData+sockets[*it]->sentSize,sockets[*it]->sendSize-sockets[*it]->sentSize,0);
          if(sent==-1) {
            perror("Wireless::pollProcess(): send");
            sockets[*it]->tx = false;
            sockets[*it]->sendSize = sockets[*it]->sentSize = 0;
          } else {
            sockets[*it]->sentSize+=sent;
            if(sockets[*it]->sentSize==sockets[*it]->sendSize) {
              sockets[*it]->tx = false;
              sockets[*it]->sendSize = sockets[*it]->sentSize = 0;
              sockets[*it]->flush();
            }
          }
        }
      } else {
        cerr << "Wireless::pollProcess(): socket write flag in bad state" << endl;
      }
    }
    if(FD_ISSET(s,&efds)) {
      FD_CLR(s,&efds); // in case we loop do to invalidated iterator during user callback
      cerr << "Socket exception: " << flush;
      int err=0;
      socklen_t errlen=sizeof(err);
      if ( ::getsockopt ( s, SOL_SOCKET, SO_ERROR, &err, &errlen ) == -1 ) {
        perror("Wireless::processPoll(): getsockopt");
      }
      cerr << err << " endpoint=" << s << " sock=" << *it << " Socket=" << sockets[*it] << endl;
    }
  }
}

/*! @param del if non-NULL, will cause the socket to be closed and deleted */
void Wireless::wakeup(Socket * del/*=NULL*/) {
  ::write(interruptCtl,&del,sizeof(del));
}

Resource& Wireless::getLock() {
  static Thread::Lock lock;
  return lock;
}

void Wireless::setCallbackLock(Resource& l) {
  MarkScope pcl(getCallbackLock()); //put a lock on previous callback until we've switched
  callbackLock=&l;
}

void Wireless::clearCallbackLock() {
  callbackLock=NULL;
}

uint32 Wireless::getIFAddress(const char *interface) {
  int fd;
  struct ifreq ifr;

  fd = ::socket(AF_INET, SOCK_DGRAM, 0);

  // Want an IPv4 IP address
  ifr.ifr_addr.sa_family = AF_INET;

  // Want IP address attached to "eth0"
  strncpy(ifr.ifr_name, interface, IFNAMSIZ-1);

  ioctl(fd, SIOCGIFADDR, &ifr);

  close(fd);

  return ntohl(((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr);
}

#endif

/*! @file
 * @brief Interacts with the system to provide networking services
 * @author alokl (Creator)
 * @author Erik Berglund and Bryan Johnson (UDP support)
 * @author ejt simulator support
 *
 * @verbinclude CMPack_license.txt
 */