tcp_cli.c

Unix/Linux下服务端/客户通过TCP/IP通讯的程序

#include "tcp.h"

main(argc, argv)
int argc;
char *argv[];
{
	int sockfd,newsockfd ;
	int clilen, childpid;
	struct sockaddr_in serv_addr, cli_addr;

	/**** 	Internet Address Family: AF_INET 
		scoket type : SOCK_STREAME 		***/
	if( (sockfd = socket( AF_INET, SOCK_STREAM,0)) < 0 ) 
		err_sys( "client: can't open socket " ) ;
	printf( "TCP SOCKET IS SUCCESS LOAD IN!\n" );

	bzero( (char *)&serv_addr, sizeof(serv_addr ) );
	serv_addr.sin_family = AF_INET;	
	serv_addr.sin_addr.s_addr = inet_addr( TCP_SERV_ADDR );	
	serv_addr.sin_port = htons( TCP_PORT );	

	if( connect(sockfd,(struct sockaddr *)&serv_addr, sizeof(serv_addr))<0) 
		err_sys( "client:can't connect to server" );
	printf( "CONNECT TO %s SUCCESS!\n " , TCP_SERV_ADDR );

	cli_con(sockfd);

	close( sockfd );

}
cli_con( fd )
int fd;
{
	int n;
	char s[1024];
	FILE *fp;
	char sendline[MAXLINE], recvline[MAXLINE+1];
	
	if ( (fp=fopen( "./textin", "r" )) == NULL )
		err_sys( "can't open file ./textin" );
	while( fgets( sendline, MAXLINE, fp )!= NULL ){
		n = strlen(sendline);
		printf( "%s\n", sendline );
		printf( "write to server return %d\n", write( fd, sendline,n)); 
/*
		if ( writen(fd, sendline, n) != n ) 
			err_sys( "clr_con:write to sockfd error!" );
		n = readline( fd , recvline, MAXLINE );
		if ( n < 0 )
			err_sys( "str_con:read from sockfd error!" );
		recvline[n] = '\0';
		fputs( recvline, stdout );
*/
	}
	printf( "please put the message you will sent:\n" );
	read(1,s,100);
	
	fclose(fp);

}

err_sys(s)
char *s;
{
	printf( s );
	exit(0);
}