socket通信 客户端与服务器无法连通 不知道为什么。。。

[huankid]

#include <winsock.h>
#include <stdio.h>

#define MY_PORT 6000

int main() {
	SOCKET conn_sock;
	struct sockaddr_in remote_addr;
	int bytes_recvd;
	char buffer[100];
	WSADATA wsaData;
	
	WSAStartup(MAKEWORD(1,1),&wsaData);

	conn_sock = socket(AF_INET, SOCK_STREAM, 0); //socket构造函数
    bind(conn_sock, (struct sockaddr *)&remote_addr, sizeof(struct sockaddr));//绑定

	remote_addr.sin_family = AF_INET;     
	remote_addr.sin_port = htons(MY_PORT); 
	remote_addr.sin_addr.s_addr = inet_addr("localhost");
    
	connect(conn_sock, (struct sockaddr *)&remote_addr, sizeof(struct sockaddr));//建立连接
	bytes_recvd = recv(conn_sock, buffer, sizeof(buffer), 0);	//接收数据
	printf("Received (%d bytes): \"%s\"\n", bytes_recvd, buffer);
		
	closesocket(conn_sock);
	WSACleanup();

	return 0;
}

#include <winsock.h>
#include <stdio.h>

#define MY_PORT 6000

int main() {
	SOCKET listen_sock, new_sock;
	struct sockaddr_in my_addr;
	int dummy;
	char buffer[50] ="How old are you?\n";
	WSADATA wsaData;
	
	WSAStartup(MAKEWORD(1,1),&wsaData);
	
	listen_sock = socket(AF_INET, SOCK_STREAM, 0); //socket 构造函数

	my_addr.sin_family = AF_INET;     
	my_addr.sin_port = htons(MY_PORT); 
	my_addr.sin_addr.s_addr = htonl(INADDR_ANY);
    
	bind(listen_sock, (struct sockaddr *)&my_addr, sizeof(struct sockaddr));//绑定
	listen(listen_sock, 5);//监听
	new_sock = accept(listen_sock, NULL, &dummy);//接收链接
	send(new_sock, buffer, strlen(buffer), 0);//发送数据

	closesocket(new_sock);
	closesocket(listen_sock);
	WSACleanup();

	return 0;
}

怎样才能互发消息？

[黑娃]

accept参数没对

[黑娃]

accept(listen_sock, NULL, &dummy);//接收链接
最后两个参数是套接字地址和地址长度

[自信男孩]

不妨在定义了客户端的结构体即：struct sockaddr_in client;
然后修改accept函数：new_sock = accept(listen_sock, (struct sockaddr *)&client, &sizeof(struct sockaddr_in));

最好为每个函数都做一下错误处理，这样即使出错了也知道是哪个出错了，错在了哪。

[ganlubing]

accept(int s, struct sockaddr *addr, int *addrlen)

[ganlubing]

而且，tcpclient不需要bind操作吧，client的端口应该可变的。只有服务器端使用固定端口。

[Gloveing]

LS正解：客户端不需要绑定
bind(conn_sock, (struct sockaddr *)&remote_addr, sizeof(struct sockaddr));//绑定