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220 lines
6.5 KiB
220 lines
6.5 KiB
/* |
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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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#include <string.h> |
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#include <stdexcept> |
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#include <string> |
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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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#include "Buffer.hpp" |
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#define ZT_PATH_SERIALIZATION_VERSION 1 |
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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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_lastSend(0), |
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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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Path(const Path &p) |
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{ |
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// InetAddress is memcpy'able |
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memcpy(this,&p,sizeof(Path)); |
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} |
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Path(const InetAddress &addr,bool tcp,bool fixed = false) : |
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_lastSend(0), |
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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 Path &operator=(const Path &p) |
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{ |
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if (this != &p) |
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memcpy(this,&p,sizeof(Path)); |
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return *this; |
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} |
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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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inline uint64_t lastSend() const throw() { return _lastSend; } |
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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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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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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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/** |
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* @param now Current time |
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* @return True if this path is fixed or has received data in last ACTIVITY_TIMEOUT ms |
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*/ |
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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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Utils::snprintf(lsago,sizeof(lsago),"%lld",(long long)((_lastSend != 0) ? (now - _lastSend) : -1)); |
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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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return ( _addr.toString() + |
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"[" + |
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(_tcp ? "tcp" : "udp") + |
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";" + |
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lsago + |
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";" + |
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lrago + |
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";" + |
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lpago + |
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";" + |
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lfoago + |
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";" + |
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(active(now) ? "active" : "inactive") + |
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";" + |
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(_fixed ? "fixed" : "learned") + |
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"]" |
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); |
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} |
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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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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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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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private: |
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volatile uint64_t _lastSend; |
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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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