dummytest.c

来自「一个基于linux的TCP/IP协议栈的实现」· C语言 代码 · 共 47 行

/* create_dummysock.c
 * [e-mail]
 * 2006-09-07
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <stdio.h>
#include <arpa/inet.h>

#include "dummy.h"

int main()
{
	int fd;
	char *msg = "hello tcp/ip!";
	struct sockaddr_in dstaddr;
	char rcvbuf[1024];

	dstaddr.sin_family = DEBUG_PF_INET;
	dstaddr.sin_port = 0;
	inet_aton( "127.10.0.1", &(dstaddr.sin_addr) );

	fd = socket( DEBUG_PF_INET, SOCK_DUMMY, IPPROTO_DUMMY );
	if( fd < 0 ){
		perror( "create socket error: " );
		return -1;
	}

	printf( "send data: %s\n", msg );
	if( sendto( fd, msg, strlen(msg), 0, (struct sockaddr*)&dstaddr, sizeof(dstaddr) ) < 0 ){
		perror( "send error: " );
		return -1;
	}

	memset( rcvbuf, 0, sizeof(rcvbuf) );
	if( recv( fd, rcvbuf, 1024, 0 ) < 0 ){
		perror( "recv error: " );
		return -1;
	}
	printf( "received data: %s\n", rcvbuf );

	return 0;
}