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添加TCP SYN扫描的Qt程序

article 2025/3/4 5:29:50

在Qt框架中实现TCP SYN扫描需要使用Qt的网络模块（Qt Network）来发送和接收网络数据包。由于Qt本身并不直接支持底层网络操作（如直接发送原始数据包），因此我们需要结合使用Qt和一些底层网络库（如libpcap或raw sockets）来实现这一功能。基于Qt的端口扫描程序的设计与实现-CSDN博客

以下是一个基于Qt和raw sockets的TCP SYN扫描的简单实现示例。请注意，这个示例仅用于教育目的，实际使用时需要确保遵守相关法律法规。

1. 环境准备

确保你的开发环境已经安装了Qt和相关的开发工具。

2. 创建Qt项目

创建一个新的Qt控制台应用程序项目。

3. 添加必要的头文件

在你的项目中添加以下头文件：

#include <QCoreApplication>
#include <QDebug>
#include <QHostAddress>
#include <QNetworkInterface>
#include <QThread>
#include <QTimer>
#include <QDateTime>
#include <QSocketNotifier>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <cstring>

4. 实现TCP SYN扫描

以下是一个简单的TCP SYN扫描实现：

class TcpSynScanner : public QObject {
    Q_OBJECT

public:
    TcpSynScanner(QObject *parent = nullptr) : QObject(parent) {
        rawSocket = socket(AF_INET, SOCK_RAW, IPPROTO_TCP);
        if (rawSocket < 0) {
            qDebug() << "Failed to create raw socket";
            return;
        }
    }

    ~TcpSynScanner() {
        close(rawSocket);
    }

    void scan(const QString &targetIp, quint16 startPort, quint16 endPort) {
        struct sockaddr_in destAddr;
        memset(&destAddr, 0, sizeof(destAddr));
        destAddr.sin_family = AF_INET;
        destAddr.sin_addr.s_addr = inet_addr(targetIp.toStdString().c_str());

        for (quint16 port = startPort; port <= endPort; ++port) {
            destAddr.sin_port = htons(port);

            // Create TCP SYN packet
            char packet[4096];
            memset(packet, 0, sizeof(packet));
            struct iphdr *ipHeader = (struct iphdr *)packet;
            struct tcphdr *tcpHeader = (struct tcphdr *)(packet + sizeof(struct iphdr));

            // Fill IP header
            ipHeader->ihl = 5;
            ipHeader->version = 4;
            ipHeader->tos = 0;
            ipHeader->tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
            ipHeader->id = htons(54321);
            ipHeader->frag_off = 0;
            ipHeader->ttl = 255;
            ipHeader->protocol = IPPROTO_TCP;
            ipHeader->check = 0;
            ipHeader->saddr = inet_addr("192.168.1.2"); // Source IP address
            ipHeader->daddr = destAddr.sin_addr.s_addr;

            // Fill TCP header
            tcpHeader->source = htons(12345); // Source port
            tcpHeader->dest = htons(port);
            tcpHeader->seq = htonl(123456);
            tcpHeader->ack_seq = 0;
            tcpHeader->doff = 5;
            tcpHeader->syn = 1;
            tcpHeader->window = htons(65535);
            tcpHeader->check = 0;
            tcpHeader->urg_ptr = 0;

            // Calculate TCP checksum
            tcpHeader->check = calculateTcpChecksum(ipHeader, tcpHeader);

            // Send packet
            if (sendto(rawSocket, packet, ipHeader->tot_len, 0, (struct sockaddr *)&destAddr, sizeof(destAddr)) < 0) {
                qDebug() << "Failed to send packet to port" << port;
            } else {
                qDebug() << "Sent SYN packet to port" << port;
            }

            // Wait for a short time before sending the next packet
            QThread::msleep(100);
        }
    }

private:
    int rawSocket;

    quint16 calculateTcpChecksum(struct iphdr *ipHeader, struct tcphdr *tcpHeader) {
        // This is a simplified checksum calculation for demonstration purposes
        // In a real implementation, you should calculate the checksum correctly
        return 0;
    }
};

int main(int argc, char *argv[]) {
    QCoreApplication a(argc, argv);

    TcpSynScanner scanner;
    scanner.scan("192.168.1.1", 1, 1024); // Scan ports 1 to 1024 on 192.168.1.1

    return a.exec();
}

#include "main.moc"