UNIX socket 编程

最新推荐文章于 2025-03-13 08:44:44 发布

原创最新推荐文章于 2025-03-13 08:44:44 发布 · 873 阅读

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文章标签：

#socket #unix #buffer #stream #服务器 #server

本文详细介绍了客户端如何向服务器发送数据以及服务器如何接收并处理这些数据。通过使用C++编程语言，展示了socket编程的基本概念，包括创建套接字、绑定本地地址、连接远程服务器以及发送和接收数据的过程。

客户端像服务器端发送数据：

服务器:192.168.1.101:1234 本地端口4444（本地地址可不设置，端口由系统自动设置）

#include <QtCore/QCoreApplication> #include <QDebug> #include <unistd.h> #include <sys/socket.h> #include <arpa/inet.h> int main(int argc, char *argv[]) { QCoreApplication a(argc, argv); int skt = socket(AF_INET, SOCK_STREAM, 0); // local address (optional) sockaddr_in localaddr; localaddr.sin_family = AF_INET; localaddr.sin_port = htons(4444); localaddr.sin_addr.s_addr = INADDR_ANY; memset(localaddr.sin_zero, 0, sizeof(localaddr.sin_zero)); bind(skt, (sockaddr *)&localaddr, sizeof(localaddr)); // remote(server) address sockaddr_in addr; addr.sin_family = AF_INET; addr.sin_port = htons(1234); char ipAddr[] = "192.168.1.101"; inet_pton(AF_INET,ipAddr ,&addr.sin_addr); memset(addr.sin_zero, 0, sizeof(addr.sin_zero)); int r = connect(skt, (sockaddr *)&addr, sizeof(addr)); qDebug() << r; char data[] = "hello world!"; send(skt, data, sizeof(data), MSG_CONFIRM); return a.exec(); }

作为服务器端：

端口地址1234

#include <QtCore/QCoreApplication> #include <QDebug> #include <unistd.h> #include <sys/socket.h> #include <arpa/inet.h> #include <sys/wait.h> int main(int argc, char *argv[]) { QCoreApplication a(argc, argv); int skt = socket(AF_INET, SOCK_STREAM, 0); // local address(server port) sockaddr_in localaddr; localaddr.sin_family = AF_INET; localaddr.sin_port = htons(1234); localaddr.sin_addr.s_addr = INADDR_ANY; memset(localaddr.sin_zero, 0, sizeof(localaddr.sin_zero)); bind(skt, (sockaddr *)&localaddr, sizeof(localaddr)); // qDebug() << "bind" << listen(skt,100); while(true) { sockaddr_in clientaddr; unsigned addrlen; int client = accept(skt, (sockaddr*)&clientaddr, &addrlen); qDebug() << "accept:" << client; int pid = fork(); if(pid < 0) { qDebug() << "child process error."; } else if(pid == 0) { // child process char buffer[100]; int dataLen = recv(client, buffer, sizeof(buffer), MSG_WAITALL); qDebug() << "data length:" << dataLen; for(int i = 0; i < dataLen; i++) { qDebug() << buffer[i]; } close(client); } else { close(client); int status; waitpid(pid, &status, 0); } } return a.exec(); }