mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-21 05:53:09 +00:00
220 lines
8.6 KiB
C++
220 lines
8.6 KiB
C++
/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2015 ZeroTier, Inc.
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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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#include <stdint.h>
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#include "NetworkConfig.hpp"
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#include "Utils.hpp"
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namespace ZeroTier {
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// This is fast enough for things like Apple's mDNS spam, so it should serve
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// as a good default for your average network.
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const NetworkConfig::MulticastRate NetworkConfig::DEFAULT_MULTICAST_RATE(40000,60000,80);
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SharedPtr<NetworkConfig> NetworkConfig::createTestNetworkConfig(const Address &self)
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{
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SharedPtr<NetworkConfig> nc(new NetworkConfig());
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memset(nc->_etWhitelist,0,sizeof(nc->_etWhitelist));
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nc->_etWhitelist[0] |= 1; // allow all
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nc->_nwid = ZT_TEST_NETWORK_ID;
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nc->_timestamp = 1;
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nc->_revision = 1;
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nc->_issuedTo = self;
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nc->_multicastLimit = ZT_MULTICAST_DEFAULT_LIMIT;
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nc->_allowPassiveBridging = false;
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nc->_private = false;
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nc->_enableBroadcast = true;
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nc->_name = "ZT_TEST_NETWORK";
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nc->_description = "Built-in dummy test network";
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// Make up a V4 IP from 'self' in the 10.0.0.0/8 range -- no
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// guarantee of uniqueness but collisions are unlikely.
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uint32_t ip = (uint32_t)((self.toInt() & 0x00ffffff) | 0x0a000000); // 10.x.x.x
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if ((ip & 0x000000ff) == 0x000000ff) ip ^= 0x00000001; // but not ending in .255
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if ((ip & 0x000000ff) == 0x00000000) ip ^= 0x00000001; // or .0
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nc->_staticIps.push_back(InetAddress(Utils::hton(ip),8));
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return nc;
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}
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std::vector<unsigned int> NetworkConfig::allowedEtherTypes() const
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{
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std::vector<unsigned int> ets;
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if ((_etWhitelist[0] & 1) != 0) {
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ets.push_back(0);
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} else {
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for(unsigned int i=0;i<sizeof(_etWhitelist);++i) {
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if (_etWhitelist[i]) {
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unsigned char b = _etWhitelist[i];
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unsigned int et = i * 8;
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while (b) {
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if ((b & 1))
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ets.push_back(et);
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b >>= 1;
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++et;
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}
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}
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}
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}
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return ets;
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}
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const NetworkConfig::MulticastRate &NetworkConfig::multicastRate(const MulticastGroup &mg) const
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throw()
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{
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std::map<MulticastGroup,MulticastRate>::const_iterator r(_multicastRates.find(mg));
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if (r == _multicastRates.end()) {
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r = _multicastRates.find(MulticastGroup()); // zero MG signifies network's default rate
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if (r == _multicastRates.end())
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return DEFAULT_MULTICAST_RATE; // neither specific nor default found in network config
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}
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return r->second;
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}
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void NetworkConfig::_fromDictionary(const Dictionary &d)
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{
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static const std::string zero("0");
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static const std::string one("1");
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// NOTE: d.get(name) throws if not found, d.get(name,default) returns default
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_nwid = Utils::hexStrToU64(d.get(ZT_NETWORKCONFIG_DICT_KEY_NETWORK_ID).c_str());
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if (!_nwid)
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throw std::invalid_argument("configuration contains zero network ID");
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_timestamp = Utils::hexStrToU64(d.get(ZT_NETWORKCONFIG_DICT_KEY_TIMESTAMP).c_str());
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_revision = Utils::hexStrToU64(d.get(ZT_NETWORKCONFIG_DICT_KEY_REVISION,"1").c_str()); // older controllers don't send this, so default to 1
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memset(_etWhitelist,0,sizeof(_etWhitelist));
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std::vector<std::string> ets(Utils::split(d.get(ZT_NETWORKCONFIG_DICT_KEY_ALLOWED_ETHERNET_TYPES).c_str(),",","",""));
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for(std::vector<std::string>::const_iterator et(ets.begin());et!=ets.end();++et) {
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unsigned int tmp = Utils::hexStrToUInt(et->c_str()) & 0xffff;
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_etWhitelist[tmp >> 3] |= (1 << (tmp & 7));
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}
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_issuedTo = Address(d.get(ZT_NETWORKCONFIG_DICT_KEY_ISSUED_TO));
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_multicastLimit = Utils::hexStrToUInt(d.get(ZT_NETWORKCONFIG_DICT_KEY_MULTICAST_LIMIT,zero).c_str());
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if (_multicastLimit == 0) _multicastLimit = ZT_MULTICAST_DEFAULT_LIMIT;
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_allowPassiveBridging = (Utils::hexStrToUInt(d.get(ZT_NETWORKCONFIG_DICT_KEY_ALLOW_PASSIVE_BRIDGING,zero).c_str()) != 0);
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_private = (Utils::hexStrToUInt(d.get(ZT_NETWORKCONFIG_DICT_KEY_PRIVATE,one).c_str()) != 0);
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_enableBroadcast = (Utils::hexStrToUInt(d.get(ZT_NETWORKCONFIG_DICT_KEY_ENABLE_BROADCAST,one).c_str()) != 0);
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_name = d.get(ZT_NETWORKCONFIG_DICT_KEY_NAME);
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if (_name.length() > ZT1_MAX_NETWORK_SHORT_NAME_LENGTH)
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throw std::invalid_argument("network short name too long (max: 255 characters)");
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_description = d.get(ZT_NETWORKCONFIG_DICT_KEY_DESC,std::string());
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// In dictionary IPs are split into V4 and V6 addresses, but we don't really
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// need that so merge them here.
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std::string ipAddrs(d.get(ZT_NETWORKCONFIG_DICT_KEY_IPV4_STATIC,std::string()));
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{
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std::string v6s(d.get(ZT_NETWORKCONFIG_DICT_KEY_IPV6_STATIC,std::string()));
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if (v6s.length()) {
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if (ipAddrs.length())
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ipAddrs.push_back(',');
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ipAddrs.append(v6s);
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}
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}
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std::vector<std::string> ipAddrsSplit(Utils::split(ipAddrs.c_str(),",","",""));
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for(std::vector<std::string>::const_iterator ipstr(ipAddrsSplit.begin());ipstr!=ipAddrsSplit.end();++ipstr) {
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InetAddress addr(*ipstr);
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switch(addr.ss_family) {
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case AF_INET:
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if ((!addr.netmaskBits())||(addr.netmaskBits() > 32))
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continue;
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break;
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case AF_INET6:
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if ((!addr.netmaskBits())||(addr.netmaskBits() > 128))
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continue;
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break;
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default: // ignore unrecognized address types or junk/empty fields
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continue;
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}
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_staticIps.push_back(addr);
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}
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if (_staticIps.size() > ZT1_MAX_ZT_ASSIGNED_ADDRESSES)
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throw std::invalid_argument("too many ZT-assigned IP addresses");
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std::sort(_staticIps.begin(),_staticIps.end());
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std::unique(_staticIps.begin(),_staticIps.end());
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std::vector<std::string> activeBridgesSplit(Utils::split(d.get(ZT_NETWORKCONFIG_DICT_KEY_ACTIVE_BRIDGES,"").c_str(),",","",""));
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for(std::vector<std::string>::const_iterator a(activeBridgesSplit.begin());a!=activeBridgesSplit.end();++a) {
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if (a->length() == ZT_ADDRESS_LENGTH_HEX) { // ignore empty or garbage fields
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Address tmp(*a);
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if (!tmp.isReserved())
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_activeBridges.push_back(tmp);
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}
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}
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std::sort(_activeBridges.begin(),_activeBridges.end());
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std::unique(_activeBridges.begin(),_activeBridges.end());
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Dictionary multicastRateEntries(d.get(ZT_NETWORKCONFIG_DICT_KEY_MULTICAST_RATES,std::string()));
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for(Dictionary::const_iterator i(multicastRateEntries.begin());i!=multicastRateEntries.end();++i) {
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std::vector<std::string> params(Utils::split(i->second.c_str(),",","",""));
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if (params.size() >= 3)
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_multicastRates[MulticastGroup(i->first)] = MulticastRate(Utils::hexStrToUInt(params[0].c_str()),Utils::hexStrToUInt(params[1].c_str()),Utils::hexStrToUInt(params[2].c_str()));
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}
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std::vector<std::string> relaysSplit(Utils::split(d.get(ZT_NETWORKCONFIG_DICT_KEY_RELAYS,"").c_str(),",","",""));
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for(std::vector<std::string>::const_iterator r(relaysSplit.begin());r!=relaysSplit.end();++r) {
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std::size_t semi(r->find(';')); // address;ip/port,...
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if ((semi == ZT_ADDRESS_LENGTH)&&(r->length() > (ZT_ADDRESS_LENGTH + 1))) {
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std::pair<Address,InetAddress> relay(Address(r->substr(0,semi)),InetAddress(r->substr(semi+1)));
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if ((relay.first)&&(relay.second))
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_relays.push_back(relay);
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}
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}
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std::sort(_relays.begin(),_relays.end());
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std::unique(_relays.begin(),_relays.end());
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_com.fromString(d.get(ZT_NETWORKCONFIG_DICT_KEY_CERTIFICATE_OF_MEMBERSHIP,std::string()));
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}
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bool NetworkConfig::operator==(const NetworkConfig &nc) const
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{
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if (_nwid != nc._nwid) return false;
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if (_timestamp != nc._timestamp) return false;
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if (memcmp(_etWhitelist,nc._etWhitelist,sizeof(_etWhitelist))) return false;
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if (_issuedTo != nc._issuedTo) return false;
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if (_multicastLimit != nc._multicastLimit) return false;
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if (_allowPassiveBridging != nc._allowPassiveBridging) return false;
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if (_private != nc._private) return false;
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if (_enableBroadcast != nc._enableBroadcast) return false;
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if (_name != nc._name) return false;
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if (_description != nc._description) return false;
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if (_staticIps != nc._staticIps) return false;
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if (_activeBridges != nc._activeBridges) return false;
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if (_multicastRates != nc._multicastRates) return false;
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if (_com != nc._com) return false;
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return true;
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}
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} // namespace ZeroTier
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