一个简单的可以接收TCP服务器数据的TCP客户端

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netinet/in.h>

int main(int argc, char * argv [ ])
{
unsigned short port = 8000;			//服务器的端口号
char *server_ip = "172.17.14.111";	//服务器的IP

if (argc > 1)//函数参数，可以更改服务器的IP
{
server_ip = argv[1];
}
if (argc > 2)//函数参数，可以更改服务器的端口号
{
port = atoi(argv[2]);
}

int sockfd = 0;
sockfd = socket(AF_INET, SOCK_STREAM, 0);//创建TCP套接字
if (sockfd < 0)
{
perror("socket");
exit(-1);
}

struct sockaddr_in server_addr;
bzero(&server_addr,sizeof server_addr);
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(port);//设置要连接的IP 端口号
inet_pton(AF_INET,server_ip,&server_addr.sin_addr);
//连接服务器
int err_log = connect(sockfd,(struct sockaddr *)&server_addr,sizeof server_addr);
if (err_log != 0)
{
perror("connect");
close(sockfd);
exit(-1);
}

char send_buf[512] = "";
char recv_buf[512] = "";
printf("send data to %s:%d\n",server_ip,port);

printf("send:");
fgets(send_buf,sizeof send_buf,stdin);
send_buf[strlen(send_buf)-1] = 0;
send(sockfd,send_buf,strlen(send_buf),0);//向服务器发送数据

recv(sockfd,recv_buf,sizeof recv_buf,0);//接收服务器的相应
printf("recv:%s\n",recv_buf);
close(sockfd);
}