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106 lines
2.7 KiB
106 lines
2.7 KiB
/* |
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* ZeroTier One - Global Peer to Peer Ethernet |
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* Copyright (C) 2012-2013 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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#include <stdint.h> |
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#include "RuntimeEnvironment.hpp" |
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#include "Logger.hpp" |
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#include "Filter.hpp" |
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namespace ZeroTier { |
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bool Filter::Rule::operator()(unsigned int etype,const void *data,unsigned int len) const |
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{ |
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if ((_etherType >= 0)&&(etype != (unsigned int)_etherType)) |
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return false; // ethertype mismatch |
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switch(etype) { |
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case ZT_ETHERTYPE_IPV4: |
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if (len < 20) |
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return false; // invalid packets don't match |
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if ((_protocol >= 0)&&(((const uint8_t *)data)[9] != (uint8_t)(_protocol & 0xff))) |
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return false; // IP protocol # mismatch |
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switch(((const uint8_t *)data)[9]) { |
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} |
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break; |
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case ZT_ETHERTYPE_IPV6 |
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break; |
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} |
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return false; |
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} |
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Filter::Filter(const RuntimeEnvironment *renv) : |
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_r(renv) |
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{ |
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} |
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Filter::~Filter() |
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{ |
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} |
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void Filter::add(const Rule &r,const Action &a) |
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{ |
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Mutex::Lock _l(_chain_m); |
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for(std::vector<Entry>::iterator i(_chain.begin());i!=_chain.end();++i) { |
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if (i->rule == r) { |
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_chain.erase(i); |
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break; |
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} |
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} |
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_chain.push_back(Entry(r,a)); |
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} |
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const char *Filter::etherTypeName(const unsigned int etherType) |
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throw() |
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{ |
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static char tmp[6]; |
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switch(etherType) { |
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case ZT_ETHERTYPE_IPV4: |
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return "IPV4"; |
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case ZT_ETHERTYPE_ARP: |
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return "ARP"; |
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case ZT_ETHERTYPE_RARP: |
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return "RARP"; |
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case ZT_ETHERTYPE_ATALK: |
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return "ATALK"; |
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case ZT_ETHERTYPE_AARP: |
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return "AARP"; |
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case ZT_ETHERTYPE_IPX_A: |
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return "IPX_A"; |
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case ZT_ETHERTYPE_IPX_B: |
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return "IPX_B"; |
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case ZT_ETHERTYPE_IPV6: |
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return "IPV6"; |
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} |
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sprintf(tmp,"%.4x",etherType); |
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return tmp; // technically not thread safe, but we're only going to see this in debugging if ever |
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} |
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} // namespace ZeroTier
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