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/*
* anytun
*
* The secure anycast tunneling protocol (satp) defines a protocol used
* for communication between any combination of unicast and anycast
* tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
* mode and allows tunneling of every ETHER TYPE protocol (e.g.
* ethernet, ip, arp ...). satp directly includes cryptography and
* message authentication based on the methodes used by SRTP. It is
* intended to deliver a generic, scaleable and secure solution for
* tunneling and relaying of packets of any protocol.
*
*
* Copyright (C) 2007 anytun.org <satp@wirdorange.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program 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 this program (see the file COPYING included with this
* distribution); if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <sstream>
#include <vector>
#include <iomanip>
#include <iostream>
#include "commandHandler.h"
#include "../buffer.h"
#include "../log.h"
#define MAX_COMMAND_LENGTH 1000
CommandHandler::CommandHandler(u_int16_t lp) : running_(true), control_sock_(lp), local_address_("0.0.0.0"), local_port_(lp)
{
pthread_create(&thread_, NULL, run, this);
}
CommandHandler::CommandHandler(string la, u_int16_t lp) : running_(true), control_sock_(la, lp), local_address_(la), local_port_(lp)
{
pthread_create(&thread_, NULL, run, this);
}
CommandHandler::~CommandHandler()
{
pthread_cancel(thread_);
pthread_join(thread_, NULL);
}
void* CommandHandler::run(void* s)
{
CommandHandler* self = reinterpret_cast<CommandHandler*>(s);
Buffer buf(u_int32_t(MAX_COMMAND_LENGTH));
try
{
string remote_host;
u_int16_t remote_port;
int len;
while(1)
{
buf.setLength(MAX_COMMAND_LENGTH);
len = self->control_sock_.recvFrom(buf.getBuf(), buf.getLength(), remote_host, remote_port);
buf.setLength(len);
std::string ret = self->handle(std::string(reinterpret_cast<char*>(buf.getBuf()), buf.getLength())); // TODO: reinterpret is ugly
cLog.msg(Log::PRIO_DEBUG) << "CommandHandler received Command from " << remote_host << ":" << remote_port
<< ", ret='" << ret << "'";
self->control_sock_.sendTo(ret.c_str(), ret.length(), remote_host, remote_port);
}
}
catch(SocketException &e)
{
self->running_ = false;
pthread_exit(NULL);
}
self->running_ = false;
pthread_exit(NULL);
}
bool CommandHandler::isRunning()
{
return running_;
}
std::string CommandHandler::handle(std::string command)
{
istringstream iss(command);
ostringstream oss;
std::string cookie;
std::string cmd;
iss >> cookie;
oss << cookie << " ";
if(iss.bad() || iss.eof()) {
oss << RET_ERR_SYNTAX;
return oss.str();
}
iss >> cmd;
std::vector<std::string> params;
while(!iss.bad() && !iss.eof()) {
std::string tmp;
iss >> tmp;
params.push_back(tmp);
}
std::string ret;
switch(std::toupper(cmd[0]))
{
case CMD_REQUEST:
if(params.size() < 4) { ret = RET_ERR_SYNTAX; break; }
ret = handleRequest(cmd.erase(0,1), params[0], params[1], params[2], params[3], (params.size() < 5) ? "" : params[4]);
break;
case CMD_RESPONSE:
if(params.size() < 4) { ret = RET_ERR_SYNTAX; break; }
ret = handleResponse(cmd.erase(0,1), params[0], params[1], params[2], params[3], (params.size() < 5) ? "" : params[4]);
break;
case CMD_DELETE:
if(params.size() < 2) { ret = RET_ERR_SYNTAX; break; }
return handleDelete(params[0], params[1], (params.size() < 3) ? "" : params[2]);
case CMD_VERSION:
if(cmd.length() > 1 && cmd[1] == 'F') {
if(params.size() < 1) { ret = RET_ERR_SYNTAX; break; }
ret = handleVersionF(params[0]);
break;
}
ret = handleVersion();
break;
case CMD_INFO:
ret = handleInfo();
break;
default:
ret = RET_ERR_SYNTAX;
break;
}
oss << ret;
return oss.str();
}
string CommandHandler::handleRequest(string modifiers, string call_id, string addr, string port, string from_tag, string to_tag)
{
std::cout << "received request[" << modifiers << "] command ('" << call_id << "','" << addr << "','" << port
<< "','" << from_tag << "','" << to_tag << "')" << std::endl;
return RET_OK;
}
string CommandHandler::handleResponse(string modifiers, string call_id, string addr, string port, string from_tag, string to_tag)
{
std::cout << "received response[" << modifiers << "] command ('" << call_id << "','" << addr << "','" << port
<< "','" << from_tag << "','" << to_tag << "')" << std::endl;
return RET_OK;
}
string CommandHandler::handleDelete(string call_id, string from_tag, string to_tag)
{
std::cout << "received delete command ('" << call_id << "','" << from_tag << "','" << to_tag << "')" << std::endl;
return RET_OK;
}
string CommandHandler::handleVersion()
{
std::cout << "received version command" << std::endl;
return BASE_VERSION;
}
string CommandHandler::handleVersionF(string date_code)
{
std::cout << "received version[F] command ('" << date_code << "')" << std::endl;
if(!date_code.compare(SUP_VERSION))
return "1";
return "0";
}
string CommandHandler::handleInfo()
{
std::cout << "received info command" << std::endl;
return RET_OK;
}
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