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Copy pathServer.c
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77 lines (68 loc) · 1.92 KB
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//TCP通信的服务器端
#include <stdio.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
int main(){
//1、创建socket 用于监听的套接字
int listenfd = socket(AF_INET,SOCK_STREAM,0);
if(listenfd == -1){
perror("socket");
exit(-1);
}
//2、绑定端口和ip
struct sockaddr_in saddr;
saddr.sin_family = AF_INET;
// inet_pton(AF_INET,"0.0.0.0",saddr.sin_addr.s_addr);
saddr.sin_addr.s_addr = INADDR_ANY;
saddr.sin_port = htons(9999);
int ret = bind(listenfd,(struct sockaddr *)&saddr,sizeof(saddr));
if(ret == -1){
perror("bind");
exit(-1);
}
printf("start listen!\n");
//3、监听端口
ret = listen(listenfd,8);
printf("listen!\n");
if(ret == -1){
perror("listen");
exit(-1);
}
//4、建立连接
struct sockaddr_in caddr;
socklen_t len =sizeof(caddr);
int acceptfd = accept(listenfd,(struct sockaddr *)&caddr,&len);
if(acceptfd == -1){
perror("accept");
exit(-1);
}
printf("accept!\n");
//输出客户端的信息
char clientIP [16];
inet_ntop(AF_INET,&caddr.sin_addr.s_addr,clientIP,sizeof(clientIP));
unsigned short clientPort = ntohs(caddr.sin_port);
printf("client ip is %s,port is %d\n",clientIP,clientPort);
while(1){
//5.通信
//获取客户端的数据
char recvBuf[1024] ={0};
int clen = read(acceptfd,recvBuf,sizeof(recvBuf));
if(clen == -1){
perror("read");
exit(-1);
}else if(len > 0){
printf("recv client data:%s\n",recvBuf);
}else{
printf("client closed...");
break;
}
//给客户端发送数据
char* data = "hello, i am server!";
write(acceptfd,data,strlen(data));
}
//关闭文件描述
close(listenfd);
close(acceptfd);
}