mirror of
https://github.com/norohind/hans.git
synced 2025-04-16 06:30:33 +03:00
59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
/*
|
|
* Hans - IP over ICMP
|
|
* Copyright (C) 2009 Friedrich Schöller <friedrich.schoeller@gmail.com>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef ECHO_H
|
|
#define ECHO_H
|
|
|
|
#include <string>
|
|
#include <stdint.h>
|
|
|
|
class Echo
|
|
{
|
|
public:
|
|
Echo(int maxPayloadSize);
|
|
~Echo();
|
|
|
|
int getFd() { return fd; }
|
|
|
|
void send(int payloadLength, uint32_t realIp, bool reply, uint16_t id, uint16_t seq);
|
|
int receive(uint32_t &realIp, bool &reply, uint16_t &id, uint16_t &seq);
|
|
|
|
char *sendPayloadBuffer() { return sendBuffer + headerSize(); }
|
|
char *receivePayloadBuffer() { return receiveBuffer + headerSize(); }
|
|
|
|
static int headerSize();
|
|
protected:
|
|
struct EchoHeader
|
|
{
|
|
uint8_t type;
|
|
uint8_t code;
|
|
uint16_t chksum;
|
|
uint16_t id;
|
|
uint16_t seq;
|
|
}; // size = 8
|
|
|
|
uint16_t icmpChecksum(const char *data, int length);
|
|
|
|
int fd;
|
|
int bufferSize;
|
|
char *sendBuffer, *receiveBuffer;
|
|
};
|
|
|
|
#endif
|