TCP Server端：
#include <iostream>
#include <cstring>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
#define SRVPORT 10005
#define CONNECT_NUM 5
#define MAX_NUM 80
using namespace std;
int main( int argc, char* argv[] )
{
int aSock = -1, srcSock = -1;
int nSrvAddr = -1, cnt = -1;
sockaddr_in sa, serverSockAddr;
sockaddr srvSockAddr;
memset( &srvSockAddr, 0, sizeof(srvSockAddr) );
aSock = socket( AF_INET, SOCK_STREAM, 0 );
if( aSock < 0 )
{
cout<<"Create srcSock Error!"<<endl;
return 0;
}
memset( &serverSockAddr, 0, sizeof(serverSockAddr) );
memset( &sa, 0, sizeof(sa) );
sa.sin_family = AF_INET;
sa.sin_port = htons((u_short)SRVPORT);
sa.sin_addr.s_addr = htonl( INADDR_ANY );
if( bind( aSock, (sockaddr*) &sa, sizeof(sa) ) < 0 )
{
cout<<"Bind Error!"<<endl;
return 0;
}
if( listen(aSock, CONNECT_NUM) < 0 )
{
cout<<"Listen Error!"<<endl;
return 0;
}
cout<<"Server has been opened:"<<endl;
while( true )
{
cnt = -1;
nSrvAddr = sizeof( sockaddr_in );
srcSock = accept( aSock, (sockaddr*)&serverSockAddr, (socklen_t *) &nSrvAddr );
if( srcSock < 0 )
{
cout<<" Server accept Error@"<<endl;
cout<<"srcSock is: "<<srcSock<<endl;
cout<<" Error No is : "<<errno<<endl;
perror("server:");
return 0;
}
char szRevMeg[ MAX_NUM ] = { 0 };
char szSdMeg[ MAX_NUM ] = { "Hello World!" };
cout<<"Begin to read: "<<endl;
cnt = read( srcSock, szRevMeg, MAX_NUM );
if( cnt < 0 )
{
cout<<"Read Error!"<<endl;
return 0; //Just to test
}
cout<<" cnt is: "<<cnt<<endl;
cout<<"Complete Read:"<<endl;
cout<<szRevMeg<<endl;
cnt = write( srcSock, szSdMeg, strlen(szSdMeg)+1 );
if( cnt < 0 )
{
cout<<"Write Error!"<<endl;
}
cout<<"Write Completed!"<<endl;
close( srcSock );
cout<<endl;
}
close( aSock );
return 0;
}
TCP Client 端：
#include <iostream>
#include <cstring>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define PORT 10005
#define SRVIP "127.0.0.1" // "222.26.209.141"
#define RCVNUM 1024
using namespace std;
int main()
{
int clientSock, nRecvBytes = -1;
sockaddr_in sa;
char Buffer[RCVNUM] = { 0 };
clientSock = socket( AF_INET, SOCK_STREAM, 0 );
if( clientSock < 0 )
{
cout<<"Client Socket create error!"<<endl;
return 0;
}
memset( &sa, 0, sizeof(sa) );
sa.sin_family = AF_INET;
sa.sin_port = htons( PORT );
sa.sin_addr.s_addr = inet_addr( SRVIP );
if( connect( clientSock, (sockaddr*)&sa, sizeof(sockaddr) ) < 0 )
{
cout<<"Connect Error!"<<endl;
return 0;
}
cout<<" Client has been opened:"<<endl;
strcpy( Buffer, "Here client said: hello" );
cout<<" Begin to write: "<<endl;
write( clientSock, Buffer, strlen(Buffer)+1 );
cout<<" Write completed"<<endl;
memset( Buffer, 0, sizeof(Buffer) );
if( nRecvBytes = read( clientSock,Buffer, RCVNUM ) < 0 )
{
cout<<"Read Message Error!"<<endl;
return 0;
}
cout<<"Server says: "<<Buffer<<endl;
close( clientSock );
cout<<"End of file"<<endl;
return 0;
}
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