Tcp Winsock服务器消息不是';t在客户端终端上显示
我创建了一个简单的TCP服务器,监听8080端口,一旦建立了连接,它就会向客户端发送消息。这是密码Tcp Winsock服务器消息不是';t在客户端终端上显示,tcp,server,winsock,winsock2,Tcp,Server,Winsock,Winsock2,我创建了一个简单的TCP服务器,监听8080端口,一旦建立了连接,它就会向客户端发送消息。这是密码 #include <iostream> #include <winsock2.h> #pragma comment(lib, "ws2_32.lib") #pragma warning(disable:4996) int main(int argc, char* argv[]) { WSADATA wsa; SOCKET s, new_socket;
#include <iostream>
#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")
#pragma warning(disable:4996)
int main(int argc, char* argv[]) {
WSADATA wsa;
SOCKET s, new_socket;
int c;
int ret;
struct sockaddr_in server, client;
char* message = "Thank you for connecting to us but i got to go\n";
if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0) {
printf("Failed to initialize Winsock : %d", WSAGetLastError());
return 1;
}
s = socket(AF_INET, SOCK_STREAM, 0);
if (s == INVALID_SOCKET) {
printf("Error creating socket : %d", WSAGetLastError());
}
server.sin_family = AF_INET;
server.sin_port = htons(8080);
server.sin_addr.s_addr = INADDR_ANY;
if (bind(s, (struct sockaddr*)&server, sizeof(server)) == SOCKET_ERROR) {
printf("Error binding socket : %d\n", WSAGetLastError());
exit(EXIT_FAILURE);
}
listen(s, 3);
puts("Listening for incoming connection\n");
c = sizeof(struct sockaddr_in);
while (new_socket = accept(s, (struct sockaddr*)&client, &c) != INVALID_SOCKET) {
puts("Connection established\n");
send(new_socket, message, strlen(message), 0);
}
if (new_socket == INVALID_SOCKET) {
printf("Connection failed : %d", WSAGetLastError());
return 1;
}
closesocket(s);
WSACleanup();
return 0;
}
这是服务器端
Listening for incoming connection
Connection established
但即使在服务器表示建立了连接之后,客户端仍然保持“连接到本地主机”。我发送消息“感谢您连接到我们,但我得走了”\n但它没有显示在客户端。有什么可能出错呢?看起来,这是一个愚蠢的错误
while (new_socket = accept(s, (struct sockaddr*)&client, &c) != INVALID_SOCKET)
由于在初始化new\u socket
之后,我没有在new\u socket=accept(s,(struct sockaddr*)和client,&c上加上另一个括号,因此在accept
函数返回上应用了不等式
正确的语法应该是
while ((new_socket = accept(s, (struct sockaddr*)&client, &c)) != INVALID_SOCKET)
由于telnet不仅仅是一个原始发送/接收字节通道,您的telnet客户端在尝试连接时可能正在等待对其发送的选项的响应(协议由描述。出于测试目的,您最好构建自己的客户端。如果您费心检查系统调用,特别是
send()
,您会立即发现这个问题。不要这样编写代码。
while ((new_socket = accept(s, (struct sockaddr*)&client, &c)) != INVALID_SOCKET)