client.c

基于Linux上一个简单的UDP数据收发程序

#include <stdio.h>
#include <stdbool.h>
#include <sys/socket.h>
#include <netinet/in.h>

char *msg = "UDP CLIENT		CopyRight:2008-04\
xWorld\n===========================";

short int my_port = 7789;


/**************************************/
int main (int argc, char *argv[])
{
	printf("%s\n", msg);	
	
	int sockfd;
	sockfd = socket(AF_INET, SOCK_DGRAM, 0);

	struct sockaddr_in my, serv;
	serv.sin_family = AF_INET;
	serv.sin_port = htons(my_port);
	serv.sin_addr.s_addr = inet_addr("192.168.14.52");
	memset(serv.sin_zero, '\0', 8);
	
//	bind(sockfd, (struct sockaddr*)&serv, sizeof(struct sockaddr));

	char buf[4096];
	int stolen;
	while(strcmp(buf,"@") != 0){
		puts("In to Send Data!");	
		gets(buf);
		stolen = sendto(sockfd, &buf, sizeof(buf)-1, 0, (struct sockaddr *)&serv,
						sizeof(struct sockaddr));

		if (stolen != -1){
			printf("\tSend %i",stolen);	
		}
	}

	close(sockfd);

	return 0;
}