server.cpp

来自「一个unix和windows通用的socket函数封装的类」· C++ 代码 · 共 52 行

#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>

#include "socket.h"


void perr( char* str, ... )
{
	va_list args;
	va_start( args, str );
	vprintf( str, args );
	va_end( args );
	exit(1);
}

int main( int argc, char *argv[] )
{
	sock srv(sock::tcp);

	if( argc != 2 )
		perr("expect listening port number" );

	if( !srv.bind( inetaddr(atoi(argv[1])) ) )
		perr("Failed to bind to port number (%d)", srv.errnum() );

	if( !srv.listen() )
		perr("listen failed (%d)", srv.errnum() );

	while( srv.isValid() )	// for ever unless srv socket is corrupted
	{
		int val,l, r;
		char*p;

		sock cli = srv.accept(); // wait for a client connection

		if( !cli.isValid() )	// just check client socket validity
			continue;

		if( recvAll( (char*)&val, sizeof(val) ) != sizeof(val) )
			continue;	// wait for a new connection

		val += 5; // modify the integer

		cli.send( (char*)&val, sizeof(val) ); // send the modified integer, don't care
	}

	perr( "server socket is not valid" );

	return 0;
}