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/*
* Copyright (c) 2004 Mellanox Technologies LTD. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* $Id$
*/
#ifndef IBMS_TCPCOMM_H
#define IBMS_TCPCOMM_H
#include <pthread.h>
/****h* IBMS/TCP-IP Communication
* NAME
* TCP/IP Communication.
*
* DESCRIPTION
* Basic functionality of TCP/IP server (multi threaded) and Client.
* and receive mads.
*
* There are basically two objects:
* GenServer and GenClient. They are acting as echo servers if not
* specialized by providing new implementation of
* GenServer::processClientMessage
*
* AUTHOR
* Eitan Zahavi, Mellanox
*
*********/
#include <list>
/*
The server:
allows multiple clients to connect and handles each one by
a separate thread
*/
class GenServer {
protected:
/* a lock used to synchronize insertions into the map and client threads */
pthread_mutex_t lock;
private:
/* the port we server on */
unsigned short int serverPort;
/* the maximal single message length in bytes */
int maxMsgBytes;
/* all client thread ids are stored in here */
std::list< pthread_t > clientThreadsList;
/* the server thread gets the port number and a pointer back to the object */
struct ServerThreadArgs {
class GenServer *pServer;
};
struct ClientThreadArgs {
class GenServer *pServer;
int clientSock;
};
/* the server thread */
pthread_t serverThreadId;
/* the server socket */
int serverSock;
/* the worker function of the server thread */
static void *serverThreadMain(void *);
/* create the tcp server socket */
int createServerSocket(unsigned short portNum);
/* the worker function of the client thread */
static void *clientThreadMain(void *threadArgs);
public:
/* construct and initialize the server */
GenServer(unsigned short portNum, int maxMsgLen);
/* destructor */
virtual ~GenServer();
/* return 1 if the server is well */
int isAlive() { if (serverSock > 0) return 1; else return 0;};
/* handle client request - this is the function to override . */
virtual int proccessClientMsg(
int clientSock,
int reqLen, char request[],
int &resLen, char *(pResponse[]) );
/* virtual function called when a client is closed - under a lock */
virtual int closingClient(int clientSock) {return(0);};
};
/*
The client:
connects to a server
*/
class GenClient {
/* host name of the server */
char *hostName;
/* the server port number */
unsigned short int serverPort;
/* the socket to communicate through */
int sock;
/* the maximal single response length in bytes */
int maxResponseBytes;
public:
/* construct and initialize the client connection */
GenClient(char *pHostName, unsigned short portNum, int maxRespLen);
/* destruct a client connection */
~GenClient();
/*
send a message and wait for result
The response buffer should be pre-allocated
*/
int sendMsg(int reqLen, char request[],
int &resLen, char response[] );
};
#endif /* IBMS_TCPCOMM_H */
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