read_data.c

linux下的tcp通信多线程示例,通过创建多线程来建立TCP联接.在嵌入式系统下运行

/*
 * 
 * */
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <resolv.h>
#include <netinet/in.h>
#define SERVER_IP "127.0.0.1"
#define SERV_PORT 8888

int main(int argc,char *argv[])
{
	int i=0;
	int id;
	int serverport=0;
	struct sockaddr_in servaddr;
	int sockfd;
	char *addr[16];
	char *ptr=NULL;
	char *serverip;
	char lockname[64];
	int maxport=16;
	if(argc<3){
		printf("Usage:send severip serverport\n");
		return 0;
	}
	serverip=argv[1];
	serverport=atoi(argv[2]);
	sockfd=socket(AF_INET,SOCK_STREAM,0);
	bzero(&servaddr,sizeof(servaddr));
	servaddr.sin_family=AF_INET;
	servaddr.sin_port=htons(serverport);
	inet_pton(AF_INET,serverip,&servaddr.sin_addr);
	if(connect(sockfd,(struct sockaddr *)&servaddr,sizeof(servaddr))<0){
		perror("fail to connect:");
		return (-1);
	}
	read(sockfd,lockname,4);
	printf("read:%s\n",lockname);
	close(sockfd);
}