2014-03-21 01:49:33 +00:00
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/*
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* ZeroTier One - Global Peer to Peer Ethernet
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* Copyright (C) 2011-2014 ZeroTier Networks LLC
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#ifndef ZT_PATH_HPP
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#define ZT_PATH_HPP
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#include <stdint.h>
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2014-03-21 03:07:35 +00:00
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#include <stdexcept>
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#include <string>
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2014-03-21 01:49:33 +00:00
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#include "Constants.hpp"
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#include "InetAddress.hpp"
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#include "Utils.hpp"
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2014-03-21 03:07:35 +00:00
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#include "Buffer.hpp"
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2014-03-21 01:49:33 +00:00
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2014-03-21 03:07:35 +00:00
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#define ZT_PATH_SERIALIZATION_VERSION 1
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2014-03-21 01:49:33 +00:00
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namespace ZeroTier {
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/**
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* WAN address and protocol for reaching a peer
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*/
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class Path
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{
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public:
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Path() :
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2014-03-21 03:07:35 +00:00
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_lastSend(0),
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2014-03-21 01:49:33 +00:00
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_lastReceived(0),
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_lastFirewallOpener(0),
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_lastPing(0),
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_addr(),
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_tcp(false),
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_fixed(false) {}
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2014-03-21 03:07:35 +00:00
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Path(const InetAddress &addr,bool tcp,bool fixed = false) :
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_lastSend(0),
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2014-03-21 01:49:33 +00:00
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_lastReceived(0),
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_lastFirewallOpener(0),
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_lastPing(0),
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_addr(addr),
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_tcp(tcp),
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_fixed(fixed) {}
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inline const InetAddress &address() const throw() { return _addr; }
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inline bool tcp() const throw() { return _tcp; }
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2014-03-21 03:07:35 +00:00
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inline uint64_t lastSend() const throw() { return _lastSend; }
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2014-03-21 01:49:33 +00:00
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inline uint64_t lastReceived() const throw() { return _lastReceived; }
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inline uint64_t lastFirewallOpener() const throw() { return _lastFirewallOpener; }
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inline uint64_t lastPing() const throw() { return _lastPing; }
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inline bool fixed() const throw() { return _fixed; }
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2014-03-21 03:07:35 +00:00
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inline void setFixed(bool f) throw() { _fixed = f; }
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inline void sent(uint64_t t) throw() { _lastSend = t; }
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2014-03-21 01:49:33 +00:00
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inline void received(uint64_t t) throw() { _lastReceived = t; }
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inline void firewallOpenerSent(uint64_t t) throw() { _lastFirewallOpener = t; }
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inline void pinged(uint64_t t) throw() { _lastPing = t; }
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inline bool active(uint64_t now) const
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throw()
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{
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return ((_addr)&&((_fixed)||((now - _lastReceived) < ZT_PEER_PATH_ACTIVITY_TIMEOUT)));
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}
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/**
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* @return Human-readable address and other information about this path, some computed as of current time
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*/
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inline std::string toString() const
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{
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uint64_t now = Utils::now();
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char lsago[32],lrago[32],lfoago[32],lpago[32];
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2014-03-21 03:07:35 +00:00
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Utils::snprintf(lsago,sizeof(lsago),"%lld",(long long)((_lastSend != 0) ? (now - _lastSend) : -1));
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2014-03-21 01:49:33 +00:00
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Utils::snprintf(lrago,sizeof(lrago),"%lld",(long long)((_lastReceived != 0) ? (now - _lastReceived) : -1));
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Utils::snprintf(lfoago,sizeof(lfoago),"%lld",(long long)((_lastFirewallOpener != 0) ? (now - _lastFirewallOpener) : -1));
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Utils::snprintf(lpago,sizeof(lfoago),"%lld",(long long)((_lastPing != 0) ? (now - _lastPing) : -1));
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2014-03-21 20:46:55 +00:00
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return (_addr.toString() + "[" + (_tcp ? "tcp" : "udp") + ";" + lsago + ";" + lrago + ";" + lpago + ";" + lfoago + ";" + (active(now) ? "active" : "inactive") + ";" + (_fixed ? "fixed" : "learned") + "]");
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2014-03-21 01:49:33 +00:00
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}
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2014-03-21 20:46:55 +00:00
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inline bool operator==(const Path &p) const throw() { return ((_addr == p._addr)&&(_tcp == p._tcp)); }
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inline bool operator!=(const Path &p) const throw() { return ((_addr != p._addr)||(_tcp != p._tcp)); }
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inline bool operator<(const Path &p) const
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2014-03-21 01:49:33 +00:00
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throw()
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{
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if (_addr == p._addr) {
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if (!_tcp) // UDP < TCP
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return p._tcp;
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return false;
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} else return (_addr < p._addr);
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}
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inline bool operator>(const Path &p) const throw() { return (p < *this); }
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inline bool operator<=(const Path &p) const throw() { return !(p < *this); }
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inline bool operator>=(const Path &p) const throw() { return !(*this < p); }
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2014-03-21 03:07:35 +00:00
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template<unsigned int C>
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inline void serialize(Buffer<C> &b) const
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{
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b.append((unsigned char)ZT_PATH_SERIALIZATION_VERSION);
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b.append(_lastSend);
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b.append(_lastReceived);
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b.append(_lastFirewallOpener);
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b.append(_lastPing);
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b.append((unsigned char)_addr.type());
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switch(_addr.type()) {
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case InetAddress::TYPE_NULL:
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break;
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case InetAddress::TYPE_IPV4:
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b.append(_addr.rawIpData(),4);
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b.append((uint16_t)_addr.port());
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break;
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case InetAddress::TYPE_IPV6:
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b.append(_addr.rawIpData(),16);
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b.append((uint16_t)_addr.port());
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break;
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}
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b.append(_tcp ? (unsigned char)1 : (unsigned char)0);
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b.append(_fixed ? (unsigned char)1 : (unsigned char)0);
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}
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template<unsigned int C>
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inline unsigned int deserialize(const Buffer<C> &b,unsigned int startAt = 0)
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{
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unsigned int p = startAt;
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if (b[p++] != ZT_PATH_SERIALIZATION_VERSION)
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throw std::invalid_argument("Path: deserialize(): version mismatch");
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_lastSend = b.template at<uint64_t>(p); p += sizeof(uint64_t);
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_lastReceived = b.template at<uint64_t>(p); p += sizeof(uint64_t);
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_lastFirewallOpener = b.template at<uint64_t>(p); p += sizeof(uint64_t);
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_lastPing = b.template at<uint64_t>(p); p += sizeof(uint64_t);
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switch((InetAddress::AddressType)b[p++]) {
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case InetAddress::TYPE_IPV4:
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_addr.set(b.field(p,4),4,b.template at<uint16_t>(p + 4));
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p += 4 + sizeof(uint16_t);
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break;
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case InetAddress::TYPE_IPV6:
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_addr.set(b.field(p,16),16,b.template at<uint16_t>(p + 16));
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p += 16 + sizeof(uint16_t);
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break;
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default:
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_addr.zero();
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break;
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}
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_tcp = (b[p++] != 0);
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_fixed = (b[p++] != 0);
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return (p - startAt);
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}
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2014-03-21 01:49:33 +00:00
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private:
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2014-03-21 03:07:35 +00:00
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volatile uint64_t _lastSend;
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2014-03-21 01:49:33 +00:00
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volatile uint64_t _lastReceived;
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volatile uint64_t _lastFirewallOpener;
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volatile uint64_t _lastPing;
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InetAddress _addr;
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bool _tcp;
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bool _fixed;
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};
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} // namespace ZeroTier
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#endif
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