服务器端代码#define _WINSOCK_DEPRECATED_NO_WARNINGS #define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #include <stdlib.h> #include <string.h> #include <WinSock2.h> #ifndef MSG_NOSIGNAL #define MSG_NOSIGNAL 0 #endif #pragma comment(lib,"ws2_32.lib") SOCKET g_clientSockets[10]; int g_clientCount = 0; DWORD WINAPI ClientThread(LPVOID lpParam) { SOCKET clientSocket = (SOCKET)lpParam; char recvBuf[50], sendBuf[50]; while (1) { // 接收客户端消息并处理 int ret = recv(clientSocket, recvBuf, 50, 0); if (ret <= 0) { break; } printf("Received message from client: %s\n", recvBuf); // 转发消息给所有客户端 for (int i = 0; i < g_clientCount; i++) { if (g_clientSockets[i] != clientSocket) { send(g_clientSockets[i], recvBuf, strlen(recvBuf) + 1, 0); } } } // 关闭客户端套接字 closesocket(clientSocket); // 从全局变量中移除该客户端套接字 for (int i = 0; i < g_clientCount; i++) { if (g_clientSockets[i] == clientSocket) { g_clientCount--; memmove(&g_clientSockets[i], &g_clientSockets[i + 1], (g_clientCount - i) * sizeof(SOCKET)); break; } } return 0; } int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(1, 1); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return -1; } if (LOBYTE(wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) != 1) { WSACleanup(); return -1; } // 创建套接字并绑定到本地地址 SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0); SOCKADDR_IN addrSrv; addrSrv.sin_family = AF_INET; addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY); addrSrv.sin_port = htons(6000); bind(sockSrv, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR)); // 开始监听客户端连接请求 listen(sockSrv, 5); while (1) { // 接受客户端连接并处理消息 SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); SOCKET sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len); // 将新连接的客户端套接字加入全局变量 g_clientSockets[g_clientCount++] = sockConn; // 创建新线程来处理该客户端的消息 HANDLE hThread = CreateThread(NULL, 0, ClientThread, &sockConn, 0, NULL); // 关闭线程句柄 CloseHandle(hThread); } closesocket(sockSrv); WSACleanup(); return 0; }
时间: 2024-04-27 10:20:49 浏览: 9
这段代码是一个简单的服务器端代码,主要功能是接受客户端连接,并将客户端发送的消息转发给其他客户端。它使用了 WinSock2 库来进行网络编程。在主函数中,首先调用了 WSACleanup() 函数来释放 WinSock2 库占用的资源。然后创建了一个套接字,并将其绑定到本地地址。接着开始监听客户端连接请求,在循环中不断接受客户端连接。每当有新的客户端连接时,就将其套接字加入全局变量 g_clientSockets 中,并创建一个新线程来处理该客户端的消息。在 ClientThread 函数中,首先接收客户端发送的消息,然后将其转发给其他客户端。当客户端断开连接时,将其套接字从全局变量中移除,并关闭该客户端的套接字。最后关闭套接字并释放 WinSock2 库占用的资源。
相关问题
#include "stdafx.h" #define _WINSOCK_DEPRECATED_NO_WARNINGS #include <Winsock2.h> #include <stdio.h> #include <stdlib.h> #define DEFAULT_PORT 5050 //服务端默认端口 #pragma comment(lib, "wsock32.lib")什么意思
这段代码主要是实现了一个基于 Winsock2 库的服务端程序,其中:
- `#include "stdafx.h"` 是用来包含预编译头文件的指令。
- `#define _WINSOCK_DEPRECATED_NO_WARNINGS` 定义了一个宏,表示不使用已经过时的 Winsock API。
- `#include <Winsock2.h>` 是包含 Winsock2 库的头文件。
- `#include <stdio.h>` 和 `#include <stdlib.h>` 是标准 C 库头文件,用于输入/输出和内存管理等操作。
- `#define DEFAULT_PORT 5050` 定义了一个常量,表示服务端程序的默认端口号为 5050。
- `#pragma comment(lib, "wsock32.lib")` 是指定连接 Winsock 库时需要使用的库文件。
综上,这段代码主要是为了支持服务端程序通过 Winsock2 库实现网络通信,其中包含了 Winsock2 库的头文件和库文件,并定义了一些常量和宏来实现网络通信。
客户端代码 #define _WINSOCK_DEPRECATED_NO_WARNINGS #include <stdio.h> #include <Winsock2.h> #ifndef MSG_NOSIGNAL #define MSG_NOSIGNAL 0 #endif #pragma comment(lib,"ws2_32.lib") int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(1, 1); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return -1; } if (LOBYTE(wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) != 1) { WSACleanup(); return -1; } SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 0); SOCKADDR_IN addrSrv; addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1"); addrSrv.sin_family = AF_INET; addrSrv.sin_port = htons(6000); connect(sockClient, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR)); send(sockClient, "hello\0", strlen("hello") + 1, 0); char recvBuf[50]; recv(sockClient, recvBuf, 50, 0); printf("%s\n", recvBuf); closesocket(sockClient); WSACleanup(); return 0;} 服务器端:#define _WINSOCK_DEPRECATED_NO_WARNINGS #include <stdio.h> #include <Winsock2.h> #ifndef MSG_NOSIGNAL #define MSG_NOSIGNAL 0 #endif #pragma comment(lib,"ws2_32.lib") int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(2, 2); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return 1; } if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) { WSACleanup(); return 1; } SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0); int optval = 1; setsockopt(sockSrv, SOL_SOCKET, SO_REUSEADDR, (const char*)&optval, sizeof(optval)); SOCKADDR_IN addrSrv; addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY); addrSrv.sin_family = AF_INET; addrSrv.sin_port = htons(6000); bind(sockSrv, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR)); listen(sockSrv, 5); SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); while (1) { SOCKET sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len); char sendBuf[50]; printf(sendBuf, "Welcome %s to here!", inet_ntoa(addrClient.sin_addr)); send(sockConn, sendBuf, strlen(sendBuf) + 1, MSG_NOSIGNAL); char recvBuf[50]; recv(sockConn, recvBuf, 50, 0); printf("%s\n", recvBuf); closesocket(sockConn); } WSACleanup(); return 0;} 如何修改代码改成可以一直聊天的 不要预输入进去的 要我自己在客户端进行打字操作
要实现客户端和服务器之间的实时聊天,需要在客户端代码中添加一个循环来不断读取用户输入的消息,并将其发送给服务器。同时,在服务器端代码中也需要添加一个循环来不断接收客户端发送的消息,并将其广播给所有连接的客户端。
下面是修改后的客户端代码:
```
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <stdio.h>
#include <Winsock2.h>
#ifndef MSG_NOSIGNAL
#define MSG_NOSIGNAL 0
#endif
#pragma comment(lib,"ws2_32.lib")
int main() {
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD(1, 1);
err = WSAStartup(wVersionRequested, &wsaData);
if (err != 0) {
return -1;
}
if (LOBYTE(wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) != 1) {
WSACleanup();
return -1;
}
// 创建套接字并连接到服务器
SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 0);
SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(6000);
connect(sockClient, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR));
char sendBuf[50], recvBuf[50];
while (1) {
// 读取用户输入的消息并发送给服务器
printf("Input message to send: ");
fgets(sendBuf, 50, stdin);
send(sockClient, sendBuf, strlen(sendBuf) + 1, 0);
// 接收服务器的响应并打印出来
recv(sockClient, recvBuf, 50, 0);
printf("Received from server: %s\n", recvBuf);
}
closesocket(sockClient);
WSACleanup();
return 0;
}
```
下面是修改后的服务器端代码:
```
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <stdio.h>
#include <Winsock2.h>
#ifndef MSG_NOSIGNAL
#define MSG_NOSIGNAL 0
#endif
#pragma comment(lib,"ws2_32.lib")
int main() {
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD(2, 2);
err = WSAStartup(wVersionRequested, &wsaData);
if (err != 0) {
return 1;
}
if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) {
WSACleanup();
return 1;
}
// 创建套接字并绑定到本地地址和端口
SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0);
int optval = 1;
setsockopt(sockSrv, SOL_SOCKET, SO_REUSEADDR, (const char*)&optval, sizeof(optval));
SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(6000);
bind(sockSrv, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR));
// 监听连接请求并接受客户端连接
listen(sockSrv, 5);
SOCKADDR_IN addrClient;
int len = sizeof(SOCKADDR);
SOCKET sockConn;
fd_set fdReads;
while (1) {
// 使用 select() 函数实现非阻塞接收客户端连接
FD_ZERO(&fdReads);
FD_SET(sockSrv, &fdReads);
int ret = select(sockSrv + 1, &fdReads, NULL, NULL, NULL);
if (ret < 0) {
break;
}
if (FD_ISSET(sockSrv, &fdReads)) {
sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len);
char sendBuf[50];
printf(sendBuf, "Welcome %s to here!\n", inet_ntoa(addrClient.sin_addr));
send(sockConn, sendBuf, strlen(sendBuf) + 1, MSG_NOSIGNAL);
}
// 使用 select() 函数实现非阻塞接收客户端消息
FD_ZERO(&fdReads);
FD_SET(sockConn, &fdReads);
ret = select(sockConn + 1, &fdReads, NULL, NULL, NULL);
if (ret < 0) {
break;
}
if (FD_ISSET(sockConn, &fdReads)) {
char recvBuf[50];
recv(sockConn, recvBuf, 50, 0);
printf("Received from client: %s\n", recvBuf);
// 将客户端发送的消息广播给所有连接的客户端
for (SOCKET i = 0; i < FD_SETSIZE; i++) {
if (FD_ISSET(i, &fdReads)) {
send(i, recvBuf, strlen(recvBuf) + 1, MSG_NOSIGNAL);
}
}
}
}
closesocket(sockSrv);
WSACleanup();
return 0;
}
```