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88 lines
2.3 KiB
88 lines
2.3 KiB
// Copyright © 2020 Marius Petrescu (YO2LOJ). All rights reserved.
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// urfd -- The universal reflector
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// Copyright © 2021 Thomas A. Early N7TAE
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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 <https://www.gnu.org/licenses/>.
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#pragma once
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#include <sys/types.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <arpa/inet.h>
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#include <netinet/ip.h>
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#include <netinet/ip_icmp.h>
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#include "IP.h"
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#include "Buffer.h"
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////////////////////////////////////////////////////////////////////////////////////////
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// define
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#define RAW_BUFFER_LENMAX 65536
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////////////////////////////////////////////////////////////////////////////////////////
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// class
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class CRawSocket
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{
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public:
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// constructor
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CRawSocket();
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// destructor
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~CRawSocket();
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// open & close
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bool Open(uint16_t);
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void Close(void);
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int GetSocket(void) { return m_Socket; }
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// read
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// if ETH_P_ALL is used, the received data buffer will hold
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// the ethernet header (struct ethhdr) followed by the IP header (struct iphdr),
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// the protocol header (e.g tcp, udp, icmp) and the data.
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// For specific protocols, the data content may vary depending on the protocol
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// Returns the number of received bytes in buffer
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protected:
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int Receive(uint8_t *, CIp *, int);
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// ICMP receive helper
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// parameters:
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// buffer - packet receive buffer (starting with ip header)
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// ip - remote address (filled in on receive)
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// timeout - receive timeout in msec
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// return value:
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// ICMP type, -1 if nothing was received
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public:
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int IcmpReceive(uint8_t *, CIp *, int);
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// write
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// no write support - complexity makes it out of scope for now
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// to be added if needed
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protected:
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// data
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int m_Socket;
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int m_Proto;
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struct sockaddr_in m_SocketAddr;
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};
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