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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) 2007-2008 Othmar Gsenger, Erwin Nindl,
* Christian Pointner <satp@wirdorange.org>
*
* This file is part of Anytun.
*
* Anytun 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 3 of the License, or
* any later version.
*
* Anytun 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 anytun. If not, see <http://www.gnu.org/licenses/>.
*/
#include "networkPrefix.h"
#include "threadUtils.hpp"
#include "datatypes.h"
#include "anytunError.h"
#include "routingTable.h"
#include "routingTree.hpp"
RoutingTable* RoutingTable::inst = NULL;
Mutex RoutingTable::instMutex;
RoutingTable& gRoutingTable = RoutingTable::instance();
RoutingTable& RoutingTable::instance()
{
Lock lock(instMutex);
static instanceCleaner c;
if(!inst)
inst = new RoutingTable();
return *inst;
}
RoutingTable::RoutingTable()
{
}
RoutingTable::~RoutingTable()
{
}
void RoutingTable::updateRouteTreeUnlocked(const NetworkPrefix & pref)
{
//Lock lock(mutex_); //deadlock
u_int8_t length=pref.getNetworkPrefixLength();
network_address_type_t type=pref.getNetworkAddressType();
u_int16_t mux = routes_[pref.getNetworkAddressType()].find(pref)->second;
RoutingTreeNode * node = &(root_[type]);
if (type==ipv4)
{
ipv4_bytes_type bytes(pref.to_bytes_v4());
if (length>32)
length=32;
RoutingTree::walk(bytes, node, length, mux);
} else if (type==ipv6) {
ipv6_bytes_type bytes(pref.to_bytes_v6());
if (length>128)
length=128;
RoutingTree::walk(bytes, node, length, mux);
} else if (type==ethernet) {
ethernet_bytes_type bytes(pref.to_bytes_ethernet());
if (length>48)
length=48;
RoutingTree::walk(bytes, node, length, mux);
} else {
AnytunError::throwErr() << "illegal protocol type";
}
//root_[type].print(0);
}
void RoutingTable::addRoute(const NetworkPrefix & pref, u_int16_t mux)
{
Lock lock(mutex_);
network_address_type_t type=pref.getNetworkAddressType();
if (type==ipv4 || type==ipv6)
{
std::pair<RoutingMap::iterator, bool> ret = routes_[type].insert(RoutingMap::value_type(pref,mux));
if(!ret.second)
{
routes_[pref.getNetworkAddressType()].erase(ret.first);
routes_[pref.getNetworkAddressType()].insert(RoutingMap::value_type(pref,mux));
}
root_[pref.getNetworkAddressType()]=RoutingTreeNode();
RoutingMap::iterator it = routes_[type].begin();
for (;it!=routes_[pref.getNetworkAddressType()].end();++it)
updateRouteTreeUnlocked(it->first);
} else if (type==ethernet) {
return; // TODO: add support for ethernet
} else {
AnytunError::throwErr() << "illegal protocol type";
}
}
void RoutingTable::delRoute(const NetworkPrefix & pref )
{
Lock lock(mutex_);
routes_[pref.getNetworkAddressType()].erase(routes_[pref.getNetworkAddressType()].find(pref));
}
u_int16_t RoutingTable::getRoute(const NetworkAddress & addr)
{
Lock lock(mutex_);
network_address_type_t type=addr.getNetworkAddressType();
if (routes_[type].empty())
AnytunError::throwErr() << "no route";
if (type==ipv4)
{
ipv4_bytes_type bytes(addr.to_bytes_v4());
return RoutingTree::find(bytes, root_[type]);
} else if (type==ipv6) {
ipv6_bytes_type bytes(addr.to_bytes_v6());
return RoutingTree::find(bytes, root_[type]);
} else if (type==ethernet) {
//TODO Our model wont fit to ethernet addresses well.
// maybe use hashmap or something like that instead
ethernet_bytes_type bytes(addr.to_bytes_ethernet());
return RoutingTree::find(bytes, root_[type]);
} else {
AnytunError::throwErr() << "illegal protocol type";
}
return 0;
}
u_int16_t* RoutingTable::getOrNewRoutingTEUnlocked(const NetworkPrefix & addr)
{
RoutingMap::iterator it = routes_[addr.getNetworkAddressType()].find(addr);
if(it!=routes_[addr.getNetworkAddressType()].end())
return &(it->second);
routes_[addr.getNetworkAddressType()].insert(RoutingMap::value_type(addr, 1));
it = routes_[addr.getNetworkAddressType()].find(addr);
return &(it->second);
}
u_int16_t RoutingTable::getCountUnlocked(network_address_type_t type)
{
RoutingMap::iterator it = routes_[type].begin();
u_int16_t routes=0;
for (;it!=routes_[type].end();++it)
routes++;
return routes;
}
RoutingMap::iterator RoutingTable::getBeginUnlocked(network_address_type_t type)
{
return routes_[type].begin();
}
RoutingMap::iterator RoutingTable::getEndUnlocked(network_address_type_t type)
{
return routes_[type].end();
}
void RoutingTable::clear(network_address_type_t type)
{
Lock lock(mutex_);
routes_[type].clear();
}
bool RoutingTable::empty(network_address_type_t type)
{
Lock lock(mutex_);
return routes_[type].empty();
}
Mutex& RoutingTable::getMutex()
{
return mutex_;
}
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