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/*
* ZeroTier One - Global Peer to Peer Ethernet
* Copyright (C) 2012-2013 ZeroTier Networks LLC
*
* This program 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
* (at your option) any later version.
*
* 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. If not, see <http://www.gnu.org/licenses/>.
*
* --
*
* ZeroTier may be used and distributed under the terms of the GPLv3, which
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
*
* If you would like to embed ZeroTier into a commercial application or
* redistribute it in a modified binary form, please contact ZeroTier Networks
* LLC. Start here: http://www.zerotier.com/
*/
#include "Peer.hpp"
#include "Switch.hpp"
#include <algorithm>
namespace ZeroTier {
Peer::Peer() :
_id(),
_ipv4p(),
_ipv6p(),
_lastUsed(0),
_lastUnicastFrame(0),
_lastMulticastFrame(0),
_lastAnnouncedTo(0),
_vMajor(0),
_vMinor(0),
_vRevision(0),
_latency(0)
{
}
Peer::Peer(const Identity &myIdentity,const Identity &peerIdentity)
throw(std::runtime_error) :
_id(peerIdentity),
_ipv4p(),
_ipv6p(),
_lastUsed(0),
_lastUnicastFrame(0),
_lastMulticastFrame(0),
_lastAnnouncedTo(0),
_vMajor(0),
_vMinor(0),
_vRevision(0),
_latency(0)
{
if (!myIdentity.agree(peerIdentity,_key,ZT_PEER_SECRET_KEY_LENGTH))
throw std::runtime_error("new peer identity key agreement failed");
}
void Peer::onReceive(
const RuntimeEnvironment *_r,
Demarc::Port localPort,
const InetAddress &remoteAddr,
unsigned int hops,
uint64_t packetId,
Packet::Verb verb,
uint64_t inRePacketId,
Packet::Verb inReVerb,
uint64_t now)
{
if (!hops) { // direct packet
// Update last receive info for our direct path
WanPath *const wp = (remoteAddr.isV4() ? &_ipv4p : &_ipv6p);
wp->lastReceive = now;
wp->localPort = ((localPort) ? localPort : Demarc::ANY_PORT);
if (!wp->fixed)
wp->addr = remoteAddr;
// Announce multicast LIKEs to peers to whom we have a direct link
if ((now - _lastAnnouncedTo) >= ((ZT_MULTICAST_LIKE_EXPIRE / 2) - 1000)) {
_lastAnnouncedTo = now;
_r->sw->announceMulticastGroups(SharedPtr<Peer>(this));
}
}
if (verb == Packet::VERB_FRAME) {
_lastUnicastFrame = now;
} else if (verb == Packet::VERB_MULTICAST_FRAME) {
_lastMulticastFrame = now;
}
}
Demarc::Port Peer::send(const RuntimeEnvironment *_r,const void *data,unsigned int len,uint64_t now)
{
if ((_ipv6p.isActive(now))||((!(_ipv4p.addr))&&(_ipv6p.addr))) {
if (_r->demarc->send(_ipv6p.localPort,_ipv6p.addr,data,len,-1)) {
_ipv6p.lastSend = now;
return _ipv6p.localPort;
}
}
if (_ipv4p.addr) {
if (_r->demarc->send(_ipv4p.localPort,_ipv4p.addr,data,len,-1)) {
_ipv4p.lastSend = now;
return _ipv4p.localPort;
}
}
return Demarc::NULL_PORT;
}
bool Peer::sendFirewallOpener(const RuntimeEnvironment *_r,uint64_t now)
{
bool sent = false;
if (_ipv4p.addr) {
if (_r->demarc->send(_ipv4p.localPort,_ipv4p.addr,"\0",1,ZT_FIREWALL_OPENER_HOPS)) {
_ipv4p.lastFirewallOpener = now;
sent = true;
}
}
if (_ipv6p.addr) {
if (_r->demarc->send(_ipv6p.localPort,_ipv6p.addr,"\0",1,ZT_FIREWALL_OPENER_HOPS)) {
_ipv6p.lastFirewallOpener = now;
sent = true;
}
}
return sent;
}
bool Peer::sendPing(const RuntimeEnvironment *_r,uint64_t now)
{
bool sent = false;
if (_ipv4p.addr) {
TRACE("PING %s(%s)",_id.address().toString().c_str(),_ipv4p.addr.toString().c_str());
if (_r->sw->sendHELLO(SharedPtr<Peer>(this),_ipv4p.localPort,_ipv4p.addr)) {
_ipv4p.lastSend = now;
sent = true;
}
}
if (_ipv6p.addr) {
TRACE("PING %s(%s)",_id.address().toString().c_str(),_ipv6p.addr.toString().c_str());
if (_r->sw->sendHELLO(SharedPtr<Peer>(this),_ipv6p.localPort,_ipv6p.addr)) {
_ipv6p.lastSend = now;
sent = true;
}
}
return sent;
}
void Peer::setPathAddress(const InetAddress &addr,bool fixed)
{
if (addr.isV4()) {
_ipv4p.addr = addr;
_ipv4p.fixed = fixed;
} else if (addr.isV6()) {
_ipv6p.addr = addr;
_ipv6p.fixed = fixed;
}
}
void Peer::clearFixedFlag(InetAddress::AddressType t)
{
switch(t) {
case InetAddress::TYPE_NULL:
_ipv4p.fixed = false;
_ipv6p.fixed = false;
break;
case InetAddress::TYPE_IPV4:
_ipv4p.fixed = false;
break;
case InetAddress::TYPE_IPV6:
_ipv6p.fixed = false;
break;
}
}
} // namespace ZeroTier
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