服务器端
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int main()
{
// 创建套接字
int sockid = socket(AF_INET, SOCK_STREAM, 0);
if(sockid == -1)
perror("socket");
struct sockaddr_in saddr;
saddr.sin_family = AF_INET;
saddr.sin_addr.s_addr = htonl(INADDR_ANY); // 可接收任何IP连入
saddr.sin_port = htons(9736);
// 将套接字绑定到本机地址
if(bind(sockid, (struct sockaddr*)&saddr, sizeof(saddr)) != 0)
perror("bind");
// 可以接收请求
if(listen(sockid, 5) != 0)
perror("listen");
while(1)
{
// 捕获请求并建立连接
int client_sockid = accept(sockid, NULL, NULL);
printf("Wow! got a call!\n");
if(client_sockid == -1)
perror("accept");
char buf[100] = "Wellcome!\n";
write(client_sockid, buf, sizeof(buf));
read(client_sockid, buf, sizeof(buf));
printf("%s\n", buf);
close(client_sockid);
}
return 0;
}
客户端
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int main()
{
int sockid = socket(AF_INET, SOCK_STREAM, 0);
if(sockid == -1)
perror("socket");
struct sockaddr_in saddr;
saddr.sin_family = AF_INET;
saddr.sin_addr.s_addr = inet_addr("127.0.0.1"); // 服务器地址
saddr.sin_port = htons(9736);
// 向服务器发出连接
if(connect(sockid, (struct sockaddr*)&saddr, sizeof(saddr)) == -1)
perror("connect");
char buf[100] = "Hello!";
write(sockid, buf, sizeof(buf));
read(sockid, buf, sizeof(buf));
printf("%s\n", buf);
close(sockid);
return 0;
}