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devicetracker_httpd_pcap.cc
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devicetracker_httpd_pcap.cc
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/*
This file is part of Kismet
Kismet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Kismet is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Kismet; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "kis_net_microhttpd.h"
#include "devicetracker_httpd_pcap.h"
#include "pcapng_stream_ringbuf.h"
#include "devicetracker.h"
bool Devicetracker_Httpd_Pcap::Httpd_VerifyPath(const char *path, const char *method) {
if (strcmp(method, "GET") == 0) {
// /devices/by-key/[key]/pcap/[key].pcapng
auto devicetracker =
Globalreg::FetchGlobalAs<Devicetracker>("DEVICETRACKER");
std::vector<std::string> tokenurl = StrTokenize(path, "/");
if (tokenurl.size() < 6)
return false;
if (tokenurl[1] != "devices")
return false;
if (tokenurl[2] != "by-key")
return false;
if (tokenurl[4] != "pcap")
return false;
device_key key(tokenurl[3]);
if (key.get_error())
return false;
if (devicetracker->FetchDevice(key) == NULL)
return false;
std::string keyurl = tokenurl[3] + ".pcapng";
if (tokenurl[5] != keyurl)
return false;
return true;
}
return false;
}
int Devicetracker_Httpd_Pcap::Httpd_CreateStreamResponse(Kis_Net_Httpd *httpd,
Kis_Net_Httpd_Connection *connection,
const char *url, const char *method, const char *upload_data,
size_t *upload_data_size) {
if (strcmp(method, "GET") != 0) {
return MHD_YES;
}
auto packetchain = Globalreg::FetchMandatoryGlobalAs<Packetchain>("PACKETCHAIN");
int pack_comp_device = packetchain->RegisterPacketComponent("DEVICE");
// /devices/by-key/[key]/pcap/[key].pcapng
auto devicetracker =
Globalreg::FetchGlobalAs<Devicetracker>("DEVICETRACKER");
std::vector<std::string> tokenurl = StrTokenize(url, "/");
if (tokenurl.size() < 6)
return MHD_YES;
if (tokenurl[1] != "devices")
return MHD_YES;
if (tokenurl[2] != "by-key")
return MHD_YES;
if (tokenurl[4] != "pcap")
return MHD_YES;
device_key key(tokenurl[3]);
if (key.get_error())
return MHD_YES;
std::shared_ptr<kis_tracked_device_base> dev = devicetracker->FetchDevice(key);
if (dev == NULL)
return MHD_YES;
if (!httpd->HasValidSession(connection)) {
connection->httpcode = 503;
return MHD_YES;
}
Kis_Net_Httpd_Buffer_Stream_Aux *saux =
(Kis_Net_Httpd_Buffer_Stream_Aux *) connection->custom_extension;
// Filter based on the device key
auto *psrb = new Pcap_Stream_Packetchain(Globalreg::globalreg,
saux->get_rbhandler(),
[key, pack_comp_device](kis_packet *packet) -> bool {
kis_tracked_device_info *devinfo =
(kis_tracked_device_info *) packet->fetch(pack_comp_device);
if (devinfo == NULL) {
return false;
}
for (auto dri : devinfo->devrefs) {
if (dri.second->get_key() == key)
return true;
}
return false;
}, NULL);
auto streamtracker = Globalreg::FetchMandatoryGlobalAs<StreamTracker>("STREAMTRACKER");
saux->set_aux(psrb,
[psrb, streamtracker](Kis_Net_Httpd_Buffer_Stream_Aux *aux) {
streamtracker->remove_streamer(psrb->get_stream_id());
if (aux->aux != NULL) {
delete (Kis_Net_Httpd_Buffer_Stream_Aux *) (aux->aux);
}
});
streamtracker->register_streamer(psrb, dev->get_macaddr().Mac2String() + ".pcapng",
"pcapng", "httpd",
"pcapng of all packets for device " + dev->get_macaddr().Mac2String());
return MHD_NO;
}