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58 lines
1.4 KiB
C++
58 lines
1.4 KiB
C++
/*
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* Hans - IP over ICMP
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* Copyright (C) 2009 Friedrich Schöller <friedrich.schoeller@gmail.com>
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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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#ifndef ECHO_H
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#define ECHO_H
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#include <string>
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#include <stdint.h>
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class Echo
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{
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public:
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Echo(int maxPayloadSize);
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~Echo();
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int getFd() { return fd; }
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void send(int payloadLength, uint32_t realIp, bool reply, int id, int seq);
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int receive(uint32_t &realIp, bool &reply, int &id, int &seq);
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char *payloadBuffer() { return buffer + headerSize(); }
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static int headerSize();
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protected:
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struct EchoHeader
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{
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uint8_t type;
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uint8_t code;
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uint16_t chksum;
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uint16_t id;
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uint16_t seq;
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}; // size = 8
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uint16_t icmpChecksum(const char *data, int length);
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int fd;
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int bufferSize;
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char *buffer;
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};
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#endif
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