简单的套接字C/S通信

/*
 * =====================================================================================
 *
 *       Filename:  server.cpp
 *
 *    Description:  
 *
 *        Version:  1.0
 *        Created:  2011年12月19日 12时20分29秒
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  Albert (), [e-mail]
 *        Company:  
 *
 * =====================================================================================
 */
<pre name="code" class="cpp">#include <unistd.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <iostream>
#include <stdlib.h>

using namespace std;

int main(int argc,char**argv)
{
	int s,s1,rc;
	char buf[20];
	struct sockaddr_in local;

	local.sin_family = AF_INET;
	local.sin_port = htons(7500);
	local.sin_addr.s_addr = htonl(INADDR_ANY);

	s = socket(AF_INET,SOCK_STREAM,0);
	if(s == -1)
	{
		cout<<"socket create error"<<endl;
		exit(1);
	}

	rc = bind(s,(struct sockaddr*)&local,sizeof(local));
	if(rc == -1)
	{
		cout<<"bind error"<<endl;
		exit(1);
	}

	listen(s,5);
	
	s1 = accept(s,NULL,NULL);
	if(s1 < 0)
	{
		cout<<"accept error"<<endl;
		exit(1);
	}

	rc = recv(s1,buf,11,0);
    //rc = read(s1,buf,11);

    if(rc < 0)
	{
		cout<<"recv call error"<<endl;
		exit(1);	
	}
	cout<<"recv from client:"<<buf<<endl;
	
	rc = send(s1,"hello client",11,0);
    rc = write(s1,"hello client",11);

    if(rc < 0)
	{
		cout<<"send error"<<endl;
		exit(1);
	}

	return 0;
}
</pre>

/*
 * =====================================================================================
 *
 *       Filename:  client.cpp
 *
 *    Description:  
 *
 *        Version:  1.0
 *        Created:  2011年12月19日 12时36分25秒
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  Albert (), [e-mail]
 *        Company:  
 *
 * =====================================================================================
 */
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <iostream>

using namespace std;

int main(int argc,char**argv)
{
	int s,rc;
	struct sockaddr_in peer;
	char buf[20];
	
	peer.sin_family = AF_INET;
	peer.sin_addr.s_addr = inet_addr("127.0.0.1");
	peer.sin_port = htons(7500);

	s = socket(AF_INET,SOCK_STREAM,0);
	if(s < 0)
	{
		cout<<"socket create error"<<endl;
		exit(1);	
	}

	rc = connect(s,(struct sockaddr*)&peer,sizeof(peer));
	if(rc < 0)
	{
		cout<<"conect error"<<endl;
		exit(1);
	}

	rc = send(s,"hello server",12,0);
	//rc = write(s,"hello server",12);

    if(rc < 0)	
	{
		cout<<"send error"<<endl;	
		exit(1);
	}
	
	rc = recv(s,buf,12,0);
    //rc = read(s,buf,12);
  
   if(rc < 0)	
	{
		cout<<"recv error"<<endl;	
		exit(1);
	}

	cout<<"recv from server:"<<buf<<endl;

	return 0;
}