73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
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#include <stdio.h>
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#include <string.h>
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#include <arpa/inet.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#define PORT 23 //端口号
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#define BACKLOG 5 //最大监听数
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int main()
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{
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int iSocketFD = 0; //socket句柄
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int iRecvLen = 0; //接收成功后的返回值
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int new_fd = 0; //建立连接后的句柄
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char buf[4096] = {0}; //
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struct sockaddr_in stLocalAddr = {0}; //本地地址信息结构图，下面有具体的属性赋值
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struct sockaddr_in stRemoteAddr = {0}; //对方地址信息
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socklen_t socklen = 0;
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iSocketFD = socket(AF_INET, SOCK_STREAM, 0); //建立socket
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if(0 > iSocketFD)
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{
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printf("创建socket失败！\n");
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return 0;
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}
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stLocalAddr.sin_family = AF_INET; /*该属性表示接收本机或其他机器传输*/
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stLocalAddr.sin_port = htons(PORT); /*端口号*/
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stLocalAddr.sin_addr.s_addr=htonl(INADDR_ANY); /*IP，括号内容表示本机IP*/
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//绑定地址结构体和socket
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if(0 > bind(iSocketFD, (void *)&stLocalAddr, sizeof(stLocalAddr)))
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{
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printf("绑定失败！\n");
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return 0;
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}
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//开启监听 ，第二个参数是最大监听数
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if(0 > listen(iSocketFD, BACKLOG))
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{
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printf("监听失败！\n");
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return 0;
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}
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printf("iSocketFD: %d\n", iSocketFD);
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//在这里阻塞知道接收到消息，参数分别是socket句柄，接收到的地址信息以及大小
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new_fd = accept(iSocketFD, (void *)&stRemoteAddr, &socklen);
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if(0 > new_fd)
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{
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printf("接收失败！\n");
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return 0;
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}else{
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printf("接收成功！\n");
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//发送内容，参数分别是连接句柄，内容，大小，其他信息（设为0即可）
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send(new_fd, "这是服务器接收成功后发回的信息!", sizeof("这是服务器接收成功后发回的信息!"), 0);
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}
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printf("new_fd: %d\n", new_fd);
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iRecvLen = recv(new_fd, buf, sizeof(buf), 0);
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if(0 >= iRecvLen) //对端关闭连接 返回0
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{
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printf("接收失败或者对端关闭连接！\n");
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}else{
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printf("buf: %s\n", buf);
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}
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close(new_fd);
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close(iSocketFD);
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return 0;
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}
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