308 lines
8.8 KiB
C++
308 lines
8.8 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2011 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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// network
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#include <netdb.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <cstdio>
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// mapnik
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#include <mapnik/boolean.hpp>
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#include <mapnik/debug.hpp>
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// boost
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#include <boost/algorithm/string.hpp>
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#include <boost/tokenizer.hpp>
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#include <boost/bind.hpp>
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#include <boost/make_shared.hpp>
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#include "kismet_datasource.hpp"
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#include "kismet_featureset.hpp"
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#define MAX_TCP_BUFFER 4096 // maximum accepted TCP data block size
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// If you change this also change the according kismet command length !
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#define MAX_KISMET_LINE 1024 // maximum length of a kismet command (assumed)
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#define KISMET_COMMAND "*NETWORK: \001%1024[^\001]\001 %1024s %d %lf %lf"
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using mapnik::datasource;
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using mapnik::parameters;
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DATASOURCE_PLUGIN(kismet_datasource)
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using mapnik::box2d;
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using mapnik::coord2d;
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using mapnik::query;
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using mapnik::featureset_ptr;
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using mapnik::layer_descriptor;
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using mapnik::attribute_descriptor;
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using mapnik::datasource_exception;
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boost::mutex knd_list_mutex;
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std::list<kismet_network_data> knd_list;
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const unsigned int queue_size = 20;
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kismet_datasource::kismet_datasource(parameters const& params, bool bind)
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: datasource(params),
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extent_(),
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extent_initialized_(false),
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type_(datasource::Vector),
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srs_("+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"),
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desc_(*params.get<std::string>("type"), *params.get<std::string>("encoding","utf-8"))
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{
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boost::optional<std::string> host = params_.get<std::string>("host");
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if (host)
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{
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host_ = *host;
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}
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else
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{
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throw datasource_exception("Kismet Plugin: missing <host> parameter");
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}
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boost::optional<unsigned int> port = params_.get<unsigned int>("port", 2501);
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if (port)
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{
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port_ = *port;
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}
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boost::optional<std::string> srs = params_.get<std::string>("srs");
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if (srs)
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{
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srs_ = *srs;
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}
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boost::optional<std::string> ext = params_.get<std::string>("extent");
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if (ext)
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{
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extent_initialized_ = extent_.from_string(*ext);
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}
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kismet_thread.reset(new boost::thread(boost::bind(&kismet_datasource::run, this, host_, port_)));
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if (bind)
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{
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this->bind();
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}
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}
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void kismet_datasource::bind() const
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{
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if (is_bound_) return;
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is_bound_ = true;
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}
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kismet_datasource::~kismet_datasource()
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{
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}
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const char * kismet_datasource::name()
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{
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return "kismet";
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}
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mapnik::datasource::datasource_t kismet_datasource::type() const
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{
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return type_;
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}
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box2d<double> kismet_datasource::envelope() const
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{
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if (! is_bound_) bind();
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return extent_;
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}
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boost::optional<mapnik::datasource::geometry_t> kismet_datasource::get_geometry_type() const
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{
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return boost::optional<mapnik::datasource::geometry_t>(mapnik::datasource::Point);
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}
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layer_descriptor kismet_datasource::get_descriptor() const
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{
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return desc_;
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}
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featureset_ptr kismet_datasource::features(query const& q) const
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{
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if (! is_bound_) bind();
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MAPNIK_LOG_DEBUG(kismet) << "kismet_datasource::features()";
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// TODO: use box2d to filter bbox before adding to featureset_ptr
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// mapnik::box2d<double> const& e = q.get_bbox();
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boost::mutex::scoped_lock lock(knd_list_mutex);
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return boost::make_shared<kismet_featureset>(knd_list,
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srs_,
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desc_.get_encoding());
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// TODO: if illegal:
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// return featureset_ptr();
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}
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featureset_ptr kismet_datasource::features_at_point(coord2d const& pt) const
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{
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if (! is_bound_) bind();
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MAPNIK_LOG_DEBUG(kismet) << "kismet_datasource::features_at_point()";
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return featureset_ptr();
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}
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void kismet_datasource::run(const std::string& ip_host, const unsigned int port)
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{
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MAPNIK_LOG_DEBUG(kismet) << "kismet_datasource: Enter run";
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int sockfd, n;
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struct sockaddr_in sock_addr;
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struct in_addr inadr;
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struct hostent* host;
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char buffer[MAX_TCP_BUFFER]; // TCP data send from kismet_server
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std::string command;
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if (inet_aton(ip_host.c_str(), &inadr))
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{
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host = gethostbyaddr((char*)&inadr, sizeof(inadr), AF_INET);
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}
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else
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{
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host = gethostbyname(ip_host.c_str());
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}
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if (host == NULL)
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{
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MAPNIK_LOG_ERROR(kismet) << "Kismet Plugin: error while searching host";
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return;
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}
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sock_addr.sin_family = AF_INET;
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sock_addr.sin_port = htons(port);
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memcpy(&sock_addr.sin_addr, host->h_addr_list[0], sizeof(sock_addr.sin_addr));
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if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) < 0)
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{
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MAPNIK_LOG_ERROR(kismet) << "Kismet Plugin: error while creating socket";
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return;
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}
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if (connect(sockfd, (struct sockaddr*) &sock_addr, sizeof(sock_addr)))
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{
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MAPNIK_LOG_ERROR(kismet) << "Kismet Plugin: Error while connecting";
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return;
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}
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command = "!1 ENABLE NETWORK ssid,bssid,wep,bestlat,bestlon\n";
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if (write(sockfd, command.c_str(), command.length()) != (signed)command.length())
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{
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MAPNIK_LOG_ERROR(kismet) << "Kismet Plugin: Error sending command to " << ip_host;
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close(sockfd);
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return;
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}
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char ssid[MAX_KISMET_LINE] = {};
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char bssid[MAX_KISMET_LINE] = {};
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double bestlat = 0;
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double bestlon = 0;
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int crypt = crypt_none;
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// BUG: if kismet_server is active sending after mapnik was killed and then restarted the
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// assert is called. Needs to be analyzed!
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while ((n = read(sockfd, buffer, sizeof(buffer))) > 0)
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{
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assert(n < MAX_TCP_BUFFER);
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buffer[n] = '\0';
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std::string bufferObj(buffer); // TCP data send from kismet_server as STL string
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MAPNIK_LOG_DEBUG(kismet) << "kismet_datasource: buffer_obj=" << bufferObj;
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std::string::size_type found = 0;
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std::string::size_type search_start = 0;
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std::string kismet_line; // contains a line from kismet_server
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do
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{
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found = bufferObj.find('\n', search_start);
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if (found != std::string::npos)
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{
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kismet_line.assign(bufferObj, search_start, found - search_start);
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MAPNIK_LOG_DEBUG(kismet) << "kismet_datasource: line=" << kismet_line;
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int param_number = 5; // the number of parameters to parse
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// Attention: string length specified to the constant!
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if (sscanf (kismet_line.c_str(),
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KISMET_COMMAND,
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ssid,
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bssid,
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&crypt,
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&bestlat,
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&bestlon) == param_number)
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{
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MAPNIK_LOG_DEBUG(kismet) << "kismet_datasource: ssid=" << ssid
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<< ", bssid=" << bssid
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<< ", crypt=" << crypt
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<< ", bestlat=" << bestlat
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<< ", bestlon=" << bestlon;
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kismet_network_data knd(ssid, bssid, bestlat, bestlon, crypt);
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boost::mutex::scoped_lock lock(knd_list_mutex);
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// the queue only grows to a max size
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if (knd_list.size () >= queue_size)
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{
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knd_list.pop_front();
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}
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knd_list.push_back(knd);
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}
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else
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{
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// do nothing if not matched!
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}
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search_start = found + 1;
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}
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}
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while (found != std::string::npos);
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}
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if (n < 0)
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{
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MAPNIK_LOG_ERROR(kismet) << "Kismet Plugin: error while reading from socket";
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}
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close(sockfd);
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MAPNIK_LOG_DEBUG(kismet) << "kismet_datasource: Exit run";
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}
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