Http.cpp

#include "fstream"
#include "iostream"
#include "pcapplusplus/DnsLayer.h"
#include "pcapplusplus/EthLayer.h"
#include "pcapplusplus/HttpLayer.h"
#include "pcapplusplus/IPv4Layer.h"
#include "pcapplusplus/Packet.h"
#include "pcapplusplus/PcapFileDevice.h"
#include "pcapplusplus/PcapLiveDeviceList.h"
#include "pcapplusplus/TcpLayer.h"
#include "pcapplusplus/UdpLayer.h"
#include "pcapplusplus/VlanLayer.h"
#include "stdlib.h"
#include "string.h"

using namespace std;
using namespace pcpp;


namespace Action {
class HTTP {

public:
    static const int level = 5;
    int n;

    HTTP() : n(0){};
    ~HTTP(){};

    void changeUrl(Packet *inPacket, bool dir) {
        cout << "url:     " << inPacket->getLayerOfType<HttpRequestLayer>()->getUrl() << endl;
        HttpRequestLayer *http = inPacket->getLayerOfType<HttpRequestLayer>();
        //http->getFirstLine()->setMethod(pcpp::HttpRequestLayer::HttpGET);
        http->getFieldByName(PCPP_HTTP_HOST_FIELD)->setFieldValue("www.jafed.xyz");

        if (dir == 1)
            http->getFirstLine()->setUri("/test.txt");
        else
            http->getFirstLine()->setUri("/");

        http->computeCalculateFields();
        inPacket->computeCalculateFields();
        cout << "new url: " << inPacket->getLayerOfType<HttpRequestLayer>()->getUrl() << endl;
    }
    // vector<RawPacket *> *craftInGoing(RawPacket *inPacket) {
    //     Packet parsedPacket(inPacket);
    //     vector<RawPacket *> *pp = new vector<RawPacket *>();

    //     //NOTE: non riesco a prendere l'immagine perchè è suddivisa su più frame e devo prima ricostruire i pacchetti tcp
    //     //vedi: https://github.com/seladb/PcapPlusPlus/blob/master/Examples/TcpReassembly/main.cpp
    //     HttpResponseLayer *response = parsedPacket.getLayerOfType<HttpResponseLayer>();
    //     //response->http205ResetContent
    //     if (response == NULL)
    //         return nullptr;
    //     if (response->getFirstLine()->getStatusCode() == HttpResponseLayer::Http200OK) {
    //         ofstream image;
    //         image.open("passport.jpg", ios::binary);
    //         cout << "got 200 HTTP packet: " << response->getFirstLine()->getStatusCodeString() << endl;
    //         cout << response->getFieldByName(PCPP_HTTP_CONTENT_LENGTH_FIELD)->getFieldValue() << " bytes" << endl;
    //         uint8_t *p = response->getData();
    //         cout << "LEN: " << response->getDataLen() << " bytes" << endl;
    //         cout << "LEN: " << response->getHeaderLen() << " bytes" << endl;
    //         cout << response->getDataPtr(0) << endl;
    //         cout << "size: " << response->getLayerPayloadSize() << " bytes" << endl;
    //         image << response->getLayerPayload(); //è il puntatore al primo byte della stringa
    //         cout << response->getLayerPayload() << endl;
    //         image.close();
    //     }
    //     // pp->push_back(inPacket);
    //     // this->shots++;
    //     return pp;
    // }

    static bool isProtocol(Packet *p) {
        return p->getLastLayer()->getProtocol() == pcpp::HTTPRequest;
    }
};
} // namespace Action