cwTcpSocket*.h/cpp : Updated to support more socket options and configurations.

cwTcpSocket.cpp

@@ -34,6 +34,7 @@ namespace cw
       typedef struct socket_str
       {
         int                sockH;
+        int                fdH;
         unsigned           flags;
         unsigned           recvBufByteCnt;
         struct sockaddr_in sockaddr;
@@ -45,6 +46,18 @@ namespace cw
 
       rc_t _destroy( socket_t* p )
       {
+        
+        // close the fdH
+        if( p->fdH != cwSOCKET_NULL_SOCK )
+        {
+          errno = 0;
+          
+          if( ::close(p->fdH) != 0 )
+            cwLogSysError(kOpFailRC,errno,"The socket fd close failed." );
+          
+          p->fdH = cwSOCKET_NULL_SOCK;		
+        }
+
         // close the socket		
         if( p->sockH != cwSOCKET_NULL_SOCK )
         {
@@ -65,8 +78,8 @@ namespace cw
       {
         memset(retAddrPtr,0,sizeof(struct sockaddr_in));
 
-        if( portNumber == kInvalidPortNumber )
+        //if( portNumber == kInvalidPortNumber )
-          return cwLogError(kInvalidArgRC,"The port number %i cannot be used.",kInvalidPortNumber);
+        //  return cwLogError(kInvalidArgRC,"The port number %i cannot be used.",kInvalidPortNumber);
 	
         if( addrStr == NULL )
           retAddrPtr->sin_addr.s_addr 	= htonl(INADDR_ANY);
@@ -80,6 +93,7 @@ namespace cw
 	
         //retAddrPtr->sin_len 			= sizeof(struct sockaddr_in);
         retAddrPtr->sin_family 		= AF_INET;
+        if( portNumber != kInvalidPortNumber  )
           retAddrPtr->sin_port 			= htons(portNumber);
 	
         return kOkRC;
@@ -105,6 +119,26 @@ namespace cw
         return rc;
       }
 
+
+      rc_t _setTimeOutMs( socket_t* p, unsigned timeOutMs )
+      {
+        rc_t rc = kOkRC;
+
+        struct timeval 		timeOut;
+    
+        // set the socket time out 
+        timeOut.tv_sec 	= timeOutMs/1000;
+        timeOut.tv_usec = (timeOutMs - (timeOut.tv_sec * 1000)) * 1000;
+        
+        if( setsockopt( p->sockH, SOL_SOCKET, SO_RCVTIMEO, &timeOut, sizeof(timeOut) ) == cwSOCKET_SYS_ERR )
+        {
+          rc = cwLogSysError(kOpFailRC,errno, "Attempt to set the socket timeout failed." );
+          goto errLabel;
+        }
+
+      errLabel:
+        return rc;
+      }      
     }
   }    
 }
@@ -124,44 +158,26 @@ cw::rc_t cw::net::socket::create(
 
   socket_t* p = mem::allocZ<socket_t>();
   p->sockH = cwSOCKET_NULL_SOCK;
+  p->fdH   = cwSOCKET_NULL_SOCK;
+
+  int type     = cwIsFlag(flags,kStreamFl) ? SOCK_STREAM : SOCK_DGRAM;
+  int protocol = cwIsFlag(flags,kTcpFl)    ? 0           : IPPROTO_UDP;
   
   // get a handle to the socket
-  if(( p->sockH = ::socket( AF_INET, SOCK_DGRAM, IPPROTO_UDP ) ) == cwSOCKET_SYS_ERR )
+  if(( p->sockH = ::socket( AF_INET, type, protocol ) ) == cwSOCKET_SYS_ERR )
     return cwLogSysError(kOpFailRC, errno, "Socket create failed." );	 
 	
-  // create the local address		
-  if((rc = _initAddr(p, NULL, port,  &p->sockaddr )) != kOkRC )
-    goto errLabel;
-			
-  // bind the socket to a local address/port	
-  if( (bind( p->sockH, (struct sockaddr*)&p->sockaddr, sizeof(p->sockaddr))) == cwSOCKET_SYS_ERR )
-  {
-    rc = cwLogSysError(kOpFailRC,errno,"Socket bind failed." );
-    goto errLabel;
-  }
-
-  // if a remote addr was given connect this socket to it
-  if( remoteAddr != NULL )
-    if((rc = _connect(p,remoteAddr,remotePort)) != kOkRC )
-      goto errLabel;
-
   // if this socket should block
   if( cwIsFlag(flags,kBlockingFl))
   {
-    struct timeval 		timeOut;
+    if( timeOutMs > 0 )
-    
-    // set the socket time out 
-    timeOut.tv_sec 	= timeOutMs/1000;
-    timeOut.tv_usec = (timeOutMs - (timeOut.tv_sec * 1000)) * 1000;
-		
-    if( setsockopt( p->sockH, SOL_SOCKET, SO_RCVTIMEO, &timeOut, sizeof(timeOut) ) == cwSOCKET_SYS_ERR )
     {
-      rc = cwLogSysError(kOpFailRC,errno, "Attempt to set the socket timeout failed." );
+      _setTimeOutMs(p,timeOutMs);
-      goto errLabel;
     }
     
     p->flags = cwSetFlag(p->flags,kIsBlockingFl);
     
+
   }
   else
   {
@@ -185,6 +201,51 @@ cw::rc_t cw::net::socket::create(
 
   }
     
+  if( cwIsFlag(flags,kReuseAddrFl) )
+  {
+    unsigned int reuseaddr = 1;
+    if( setsockopt(p->sockH, SOL_SOCKET, SO_REUSEADDR, (const char*)&reuseaddr, sizeof(reuseaddr)) == cwSOCKET_SYS_ERR )
+    {
+      rc = cwLogSysError(kOpFailRC,errno, "Attempt to set the socket 'reuse address' attribute failed." );
+      goto errLabel;      
+    }
+  }
+  
+#ifdef SO_REUSEPORT
+  if( cwIsFlag(flags,kReusePortFl) )
+  {
+    unsigned int reuseaddr = 1;
+    if(setsockopt(p->sockH, SOL_SOCKET, SO_REUSEPORT, (const char*)&reuseaddr, sizeof(reuseaddr)) == cwSOCKET_SYS_ERR )
+    {
+      rc = cwLogSysError(kOpFailRC,errno, "Attempt to set the socket 'reuse port' attribute failed." );
+      goto errLabel;      
+    }
+  }
+#endif
+
+  if( cwIsFlag(flags,kMultiCastTtlFl) )
+  {
+    unsigned char ttl = 1;
+    if( setsockopt(p->sockH, IPPROTO_IP, IP_MULTICAST_TTL, (const char*)&ttl, sizeof(ttl)) == cwSOCKET_SYS_ERR )
+    {
+      rc = cwLogSysError(kOpFailRC,errno, "Attempt to set the socket 'multicast TTL' attribute failed." );
+      goto errLabel;      
+    }
+  }
+
+  if( cwIsFlag(flags,kMultiCastLoopFl) )
+  {
+    
+    unsigned char loopback = 1;
+    if( setsockopt(p->sockH, IPPROTO_IP, IP_MULTICAST_LOOP, (const char*)&loopback, sizeof(loopback)) == cwSOCKET_SYS_ERR )
+    {
+      rc = cwLogSysError(kOpFailRC,errno, "Attempt to set the socket 'reuse port' attribute failed." );
+      goto errLabel;      
+    }
+    
+  }
+  
+
   // if broadcast option was requested.
   if( cwIsFlag(flags,kBroadcastFl) )
   {
@@ -196,6 +257,33 @@ cw::rc_t cw::net::socket::create(
     }
   }
   
+  // create the local address		
+  if((rc = _initAddr(p, NULL, port,  &p->sockaddr )) != kOkRC )
+    goto errLabel;
+			
+  
+  // bind the socket to a local address/port	
+  if( (bind( p->sockH, (struct sockaddr*)&p->sockaddr, sizeof(p->sockaddr))) == cwSOCKET_SYS_ERR )
+  {
+    rc = cwLogSysError(kOpFailRC,errno,"Socket bind failed." );
+    goto errLabel;
+  }
+
+  // if a remote addr was given connect this socket to it
+  if( remoteAddr != NULL )
+    if((rc = _connect(p,remoteAddr,remotePort)) != kOkRC )
+      goto errLabel;
+
+  // if the socket should be marked for listening
+  if( cwIsFlag(flags,kListenFl) )
+  {
+    if( ::listen(p->sockH, 10) != 0 )
+    {
+      rc = cwLogSysError(kOpFailRC,errno,"Socket listen() failed.");
+      goto errLabel;
+    }
+  }
+  
  errLabel:
   if(rc != kOkRC )
     _destroy(p);
@@ -220,6 +308,82 @@ cw::rc_t cw::net::socket::destroy( handle_t& hRef )
   return rc;
 }
 
+cw::rc_t cw::net::socket::join_multicast_group( handle_t h, const char* addrStr )
+{
+  rc_t           rc = kOkRC;  
+  socket_t*      p  = _handleToPtr(h);
+  struct ip_mreq req;
+
+	memset(&req, 0, sizeof(req));
+
+  if(inet_pton(AF_INET,addrStr,&req.imr_multiaddr.s_addr) == 0 )
+  {
+    rc = cwLogSysError(kOpFailRC,errno, "The network address string '%s' could not be converted to a netword address structure.",cwStringNullGuard(addrStr) );
+    goto errLabel;
+  }
+  
+	req.imr_interface.s_addr = INADDR_ANY;
+  
+	if(setsockopt(p->sockH, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char*)&req, sizeof(req)) == cwSOCKET_SYS_ERR )
+  {
+    rc = cwLogSysError(kOpFailRC,errno, "Attempt to add socket to multicast group on '%s' failed.", cwStringNullGuard(addrStr) );
+    goto errLabel;   
+  }
+
+ errLabel:
+  return rc;
+}
+
+cw::rc_t cw::net::socket::setTimeOutMs( handle_t h, unsigned timeOutMs )
+{
+  socket_t* p = _handleToPtr(h);
+  return _setTimeOutMs(p,timeOutMs);
+}
+
+
+cw::rc_t cw::net::socket::accept( handle_t h )
+{
+  struct sockaddr_storage remoteAddr; // connector's address information
+  socklen_t sin_size = sizeof(remoteAddr);
+  
+  rc_t rc = kOkRC;
+  int  fd = cwSOCKET_NULL_SOCK;
+  
+  socket_t* p = _handleToPtr(h);
+  
+  if((fd = accept(p->sockH, (struct sockaddr*)&remoteAddr, &sin_size)) < 0)
+  {
+    if( errno == EAGAIN || errno == EWOULDBLOCK )
+      rc = kTimeOutRC;
+    else
+    {
+      rc = cwLogSysError(kOpFailRC,errno,"Socket accept() failed.");
+      goto errLabel;
+    }
+  }
+  else
+  {
+    char s[INET_ADDRSTRLEN+1];
+  
+    addrToString( (struct sockaddr_in*)&remoteAddr, s, INET_ADDRSTRLEN );
+
+    if( p->fdH != cwSOCKET_NULL_SOCK )
+    {
+      close(p->fdH);
+      p->fdH = cwSOCKET_NULL_SOCK;
+    }
+
+    p->fdH = fd;
+
+    printf("Connect:%s\n",s);
+
+  }
+
+ errLabel:
+  return rc;
+}
+
+
 cw::rc_t cw::net::socket::connect( handle_t h, const char* remoteAddr, portNumber_t remotePort )
 {
   socket_t* p = _handleToPtr(h);
@@ -232,7 +396,7 @@ cw::rc_t cw::net::socket::send( handle_t h, const void* data, unsigned dataByteC
   errno = 0;
   
   if( cwIsFlag(p->flags,kIsConnectedFl) == false )
-    return cwLogError(kInvalidOpRC,"cmUdpSend() only works with connected sockets.");
+    return cwLogError(kInvalidOpRC,"socket::send() only works with connected sockets.");
 
   if( ::send( p->sockH, data, dataByteCnt, 0 ) == cwSOCKET_SYS_ERR )
     return cwLogSysError(kOpFailRC,errno,"Send failed.");
@@ -246,7 +410,7 @@ cw::rc_t cw::net::socket::send( handle_t h, const void* data, unsigned dataByteC
   
   errno = 0;
    
-  if( sendto(p->sockH, data, dataByteCnt, 0, (struct sockaddr*)remoteAddr, sizeof(*remoteAddr)) == cwSOCKET_SYS_ERR )
+  if( ::sendto(p->sockH, data, dataByteCnt, 0, (struct sockaddr*)remoteAddr, sizeof(*remoteAddr)) == cwSOCKET_SYS_ERR )
     return cwLogSysError(kOpFailRC,errno,"Send to remote addr. failed.");
 
   return kOkRC;
@@ -276,7 +440,9 @@ cw::rc_t cw::net::socket::recieve( handle_t h, char* data, unsigned dataByteCnt,
   if( recvByteCntRef != NULL )
     *recvByteCntRef = 0;
 
-	if((retVal = recvfrom(p->sockH, data, dataByteCnt, 0, (struct sockaddr*)fromAddr, &sizeOfRemoteAddr )) == cwSOCKET_SYS_ERR )
+  int fd = p->fdH != cwSOCKET_NULL_SOCK ? p->fdH : p->sockH;
+
+	if((retVal = recvfrom(fd, data, dataByteCnt, 0, (struct sockaddr*)fromAddr, &sizeOfRemoteAddr )) == cwSOCKET_SYS_ERR )
       return errno == EAGAIN ? kTimeOutRC : cwLogSysError(kOpFailRC,errno,"recvfrom() failed.");
 	
   if( recvByteCntRef != NULL )
@@ -344,6 +510,43 @@ cw::rc_t cw::net::socket::select_recieve(handle_t h, char* buf, unsigned bufByte
   return rc;
 }
 
+cw::rc_t cw::net::socket::recv_from(handle_t h, char* buf, unsigned bufByteCnt, unsigned* recvByteCntRef, struct sockaddr_in* fromAddr )
+{
+  rc_t      rc      = kOkRC;
+  socket_t* p       = _handleToPtr(h);
+	socklen_t addrlen = 0;
+  int       bytesN  = 0;
+
+  if( recvByteCntRef != nullptr )
+    *recvByteCntRef = 0;
+  
+  if( fromAddr != nullptr )
+  {
+    addrlen = sizeof(*fromAddr);
+    memset(fromAddr,0,sizeof(*fromAddr));
+  }
+
+  int fd = p->fdH != cwSOCKET_NULL_SOCK ? p->fdH : p->sockH;
+  
+	if((bytesN = recvfrom(fd, buf, bufByteCnt, 0, (struct sockaddr*)fromAddr, &addrlen)) < 0 )
+  {
+    // if this is a non-blocking socket then return value -1 indicates that no data is available.
+    if( cwIsNotFlag( p->flags, kBlockingFl) && bytesN == -1)
+      bytesN = 0;
+    else
+    {
+      rc = cwLogSysError(kReadFailRC,errno,"recvfrom() failed.");
+      goto errLabel;
+    }
+  }
+
+  if( recvByteCntRef != nullptr )
+    *recvByteCntRef = bytesN;
+  
+ errLabel:
+  return rc;
+}
+
 
 cw::rc_t cw::net::socket::initAddr( handle_t h, const char* addrStr, portNumber_t portNumber, struct sockaddr_in* retAddrPtr )
 {

cwTcpSocket.h

@@ -14,10 +14,16 @@ namespace cw
       
       enum
       {
-       kNonBlockingFl = 0x00,  // create a non-blocking socket  
+       kNonBlockingFl   = 0x000,  // create a non-blocking socket  
-       kBlockingFl    = 0x01,  // create a blocking socket  
+       kBlockingFl      = 0x001,  // create a blocking socket  
-       kTcpFl         = 0x02,  // create a TCP socket rather than a UDP socket
+       kTcpFl           = 0x002,  // create a TCP socket rather than a UDP socket
-       kBroadcastFl   = 0x04   
+       kBroadcastFl     = 0x004,
+       kReuseAddrFl     = 0x008,
+       kReusePortFl     = 0x010,
+       kMultiCastTtlFl  = 0x020,
+       kMultiCastLoopFl = 0x040,
+       kListenFl        = 0x080,
+       kStreamFl        = 0x100
       };
 
       enum
@@ -36,6 +42,13 @@ namespace cw
 
       rc_t destroy( handle_t& hRef );
 
+      rc_t join_multicast_group( handle_t h, const char* addr );
+
+      rc_t setTimeOutMs( handle_t h, unsigned timeOutMs );
+
+      // Listen for a connections
+      rc_t accept( handle_t h );
+
       // Set a destination address for this socket. Once a destination address is set
       // the caller may use send() to communicate with the specified remote socket
       // without having to specify a destination address on each call.
@@ -64,6 +77,8 @@ namespace cw
       // 
       rc_t select_recieve(handle_t h, char* buf, unsigned bufByteCnt, unsigned timeOutMs, unsigned* recvByteCntRef=nullptr, struct sockaddr_in* fromAddr=nullptr );
 
+      //
+      rc_t recv_from(handle_t h, char* buf, unsigned bufByteCnt, unsigned* recvByteCntRef=nullptr, struct sockaddr_in* fromAddr=nullptr );
 
       // Prepare a struct sockadddr_in for use with send()
       rc_t        initAddr( handle_t h, const char* addrStr, portNumber_t portNumber, struct sockaddr_in* retAddrPtr );

cwTcpSocketSrv.cpp

@@ -46,8 +46,17 @@ namespace cw
         socksrv_t*         p          = static_cast<socksrv_t*>(arg);
         unsigned           rcvByteCnt = 0;
         struct sockaddr_in fromAddr;
+        rc_t rc = kOkRC;
         
-        if( select_recieve(p->sockH, p->recvBuf, p->recvBufByteCnt, p->timeOutMs, &rcvByteCnt, &fromAddr ) == kOkRC )
+        if( p->timeOutMs == 0 )
+        {
+          rc = recv_from(p->sockH, p->recvBuf, p->recvBufByteCnt, &rcvByteCnt, &fromAddr );
+          sleepMs(100);
+        }
+        else
+          rc = select_recieve(p->sockH, p->recvBuf, p->recvBufByteCnt, p->timeOutMs, &rcvByteCnt, &fromAddr );
+        
+        if( rc == kOkRC )
           if( rcvByteCnt>0 && p->cbFunc != nullptr )
             p->cbFunc( p->cbArg, p->recvBuf, rcvByteCnt, &fromAddr );
         
@@ -74,7 +83,7 @@ cw::rc_t cw::net::srv::create(
 
   socksrv_t* p = mem::allocZ<socksrv_t>();
 
-  if((rc = socket::create( p->sockH, port, socket::kNonBlockingFl, 0, remoteAddr, remotePort )) != kOkRC )
+  if((rc = socket::create( p->sockH, port, flags, timeOutMs, remoteAddr, remotePort )) != kOkRC )
     goto errLabel;
 
   if((rc = thread::create( p->threadH, _threadFunc, p )) != kOkRC )

cwTcpSocketSrv.h

@@ -7,7 +7,7 @@ namespace cw
   {
     namespace srv
     {
-      typedef void (*cbFunc_t)( void* cbArg, const char* data, unsigned dataByteCnt, const struct sockaddr_in* fromAddr ); 
+      typedef void (*cbFunc_t)( void* cbArg, const void* data, unsigned dataByteCnt, const struct sockaddr_in* fromAddr ); 
       typedef handle< struct socksrv_str > handle_t;
       
       rc_t create( handle_t& hRef,                 // 

cwTcpSocketTest.cpp

@@ -24,9 +24,12 @@ namespace cw
         handle_t         sockH;
         thread::handle_t threadH;
         unsigned         cbN;
+        bool             serverFl;
+        bool             readyFl;
+        bool             connectedFl;
       } app_t;
 
-      bool _threadFunc( void* arg )
+      bool _dgramThreadFunc( void* arg )
       {
         rc_t               rc;
         app_t*             app  = static_cast<app_t*>(arg);
@@ -50,6 +53,57 @@ namespace cw
           
         return true;
       }      
+      
+      bool _tcpStreamThreadFunc( void* arg )
+      {
+        rc_t               rc;
+        app_t*             app  = static_cast<app_t*>(arg);
+        char               buf[ app->recvBufByteN ];
+        unsigned           recvBufByteN = 0;
+
+        if( !app->serverFl )
+        {
+          // the client node has nothing to do because it does not receive (it only sends)
+          sleepMs(50);
+        }
+        else
+        {
+          if( app->connectedFl == false )
+          {
+            if((rc = accept( app->sockH )) == kOkRC )
+            {
+              app->connectedFl = true;
+              printf("Server connected.\n");
+            }
+          }
+          else
+          {              
+            if((rc = recieve( app->sockH, buf, app->recvBufByteN, &recvBufByteN, nullptr )) == kOkRC )
+            {
+              // if the server disconnects then recvBufByteN 
+              if( recvBufByteN==0 )
+              {
+                app->connectedFl = false;
+              }
+              else
+              {
+                printf("%i %s\n", recvBufByteN, buf );
+              }
+            }
+          }
+        }      
+
+        // count the number of callbacks
+        app->cbN += 1;
+        if( app->cbN % 10 == 0)
+        {
+          // print '+' when the server is not connected.
+          printf("%s", app->serverFl && app->connectedFl == false ? "+" : ".");
+          fflush(stdout);
+        }
+          
+        return true;
+      }
     }
   }
 }
@@ -68,7 +122,7 @@ cw::rc_t cw::net::socket::test( portNumber_t localPort, const char* remoteAddr,
   if((rc = create(app.sockH,localPort, kBlockingFl,timeOutMs, NULL, kInvalidPortNumber )) != kOkRC )
     return rc;
 
-  if((rc = thread::create( app.threadH, _threadFunc, &app )) != kOkRC )
+  if((rc = thread::create( app.threadH, _dgramThreadFunc, &app )) != kOkRC )
     goto errLabel;
 
   if((rc = thread::unpause( app.threadH )) != kOkRC )
@@ -95,6 +149,87 @@ cw::rc_t cw::net::socket::test( portNumber_t localPort, const char* remoteAddr,
   return rcSelect(rc,rc0,rc1);
 }
 
+
+cw::rc_t cw::net::socket::test_tcp( portNumber_t localPort, const char* remoteAddr, portNumber_t remotePort, bool dgramFl, bool serverFl )
+{
+  rc_t           rc;
+  unsigned       timeOutMs = 100;
+  const unsigned sbufN     = 31;
+  char           sbuf[ sbufN+1 ];
+  app_t          app;
+  bool           streamFl = !dgramFl;
+  bool           clientFl = !serverFl;
+  unsigned       flags = kTcpFl | kBlockingFl;
+  
+  app.cbN          = 0;
+  app.recvBufByteN = sbufN+1;
+  app.serverFl     = serverFl;
+  app.readyFl      = false;
+  app.connectedFl  = false;
+
+  if( serverFl && streamFl )
+    flags |= kListenFl;
+  
+  if( streamFl )
+    flags |= kStreamFl;
+
+  // create the socket
+  if((rc = create(app.sockH,localPort, flags,timeOutMs, NULL, kInvalidPortNumber )) != kOkRC )
+    return rc;
+
+  // create the listening thread (which is really only used by the server)
+  if((rc = thread::create( app.threadH, streamFl ? _tcpStreamThreadFunc : _dgramThreadFunc, &app )) != kOkRC )
+    goto errLabel;
+
+  // if this is the client then connect to the server (which must have already been started)
+  if( streamFl && clientFl )
+  {
+    if((rc = connect(app.sockH,remoteAddr,remotePort)) != kOkRC )
+      goto errLabel;
+    
+    app.connectedFl = true;
+  }
+
+  printf("Starting node ....\n");
+
+  // start the thread
+  if((rc = thread::unpause( app.threadH )) != kOkRC )
+    goto errLabel;
+
+  
+  while( true )
+  {
+    printf("? ");
+    if( std::fgets(sbuf,sbufN,stdin) == sbuf )
+    {
+      if( strcmp(sbuf,"quit\n") == 0)
+        break;
+
+      // when using streams only the client can send
+      if( streamFl & clientFl )
+      {  
+        printf("Sending:%s",sbuf);      
+        send(app.sockH, sbuf, strlen(sbuf)+1 );
+      }
+
+      // when using dgrams the dest. address is need to send
+      if( dgramFl )
+      {
+        printf("Sending:%s",sbuf);      
+        send(app.sockH, sbuf, strlen(sbuf)+1, remoteAddr, remotePort);
+      }
+    }
+  }
+
+ errLabel:
+  rc_t rc0 = thread::destroy(app.threadH);
+
+  rc_t rc1 = destroy(app.sockH);
+
+  return rcSelect(rc,rc0,rc1);
+}
+
+
 namespace cw
 {
   namespace net
@@ -107,13 +242,13 @@ namespace cw
         unsigned cbN;
       } app_t;
       
-     void srvRecieveCallback( void* arg, const char* data, unsigned dataByteCnt, const struct sockaddr_in* fromAddr )
+      void srvRecieveCallback( void* arg, const void* data, unsigned dataByteCnt, const struct sockaddr_in* fromAddr )
       {
         app_t* p = static_cast<app_t*>(arg);
         char addrBuf[ INET_ADDRSTRLEN ];
         socket::addrToString( fromAddr, addrBuf, INET_ADDRSTRLEN );
         p->cbN += 1;
-       printf("%i %s %s", p->cbN, addrBuf, data );
+        printf("%i %s %s", p->cbN, addrBuf, (const char*)data );
       }
     }      
   }
@@ -153,3 +288,6 @@ cw::rc_t cw::net::srv::test( socket::portNumber_t localPort, const char* remoteA
 
   return rcSelect(rc,rc0);  
 }
+
+
+

cwTcpSocketTest.h

@@ -8,11 +8,13 @@ namespace cw
     namespace socket
     {
       rc_t test( portNumber_t localPort, const char* remoteAddr, portNumber_t remotePort );      
+      rc_t test_tcp( portNumber_t localPort, const char* remoteAddr, portNumber_t remotePort, bool dgramFl, bool serverFl );      
     }
 
     namespace srv
     {
       rc_t test( socket::portNumber_t localPort, const char* remoteAddr, socket::portNumber_t remotePort );
+      rc_t mdns_test();
     }
   }
 }