ProtocolDecoders.c
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/*
LUFA Library
Copyright (C) Dean Camera, 2019.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
Copyright 2019 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
without fee, provided that the above copyright notice appear in
all copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaims all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
/* Protocol decoders for Ethernet, TCP, IP, ICMP and ARP. Each of these routines
accepts a header to the appropriate protocol and prints out pertinent information
on the packet through the serial port.
To disable printing of a specific protocol, define the token NO_DECODE_{Protocol}
in the project makefile, and pass it to the compiler using the -D switch.
*/
/** \file
*
* Protocol decoding routines, for the plain-text decoding of Ethernet frames for debugging purposes.
* Enabled protocol decoders will print incoming Ethernet frame contents through the USART in a human
* readable format.
*
* Note that the USART is a slow transmission medium, and will slow down packet processing considerably.
* Packet decoding routines can be disabled by defining NO_DECODE_{Protocol Name} in the project makefile
* and passing it to the compiler via the -D switch.
*/
#include "ProtocolDecoders.h"
/** Decodes an Ethernet frame header and prints its contents to through the USART in a human readable format.
*
* \param[in] InDataStart Pointer to the start of an Ethernet frame header
*/
void DecodeEthernetFrameHeader(void* InDataStart)
{
#if !defined(NO_DECODE_ETHERNET)
Ethernet_Frame_Header_t* FrameHeader = (Ethernet_Frame_Header_t*)InDataStart;
printf_P(PSTR("\r\n"));
printf_P(PSTR(" ETHERNET\r\n"));
if (!(MAC_COMPARE(&FrameHeader->Destination, &ServerMACAddress)) &&
!(MAC_COMPARE(&FrameHeader->Destination, &BroadcastMACAddress)))
{
printf_P(PSTR(" + NOT ADDRESSED TO DEVICE\r\n"));
return;
}
printf_P(PSTR(" + MAC Source : %02X:%02X:%02X:%02X:%02X:%02X\r\n"), FrameHeader->Source.Octets[0],
FrameHeader->Source.Octets[1],
FrameHeader->Source.Octets[2],
FrameHeader->Source.Octets[3],
FrameHeader->Source.Octets[4],
FrameHeader->Source.Octets[5]);
printf_P(PSTR(" + MAC Dest: %02X:%02X:%02X:%02X:%02X:%02X\r\n"), FrameHeader->Destination.Octets[0],
FrameHeader->Destination.Octets[1],
FrameHeader->Destination.Octets[2],
FrameHeader->Destination.Octets[3],
FrameHeader->Destination.Octets[4],
FrameHeader->Destination.Octets[5]);
printf_P(PSTR(" + Protocol: 0x%04x\r\n"), SwapEndian_16(FrameHeader->EtherType));
#endif
}
/** Decodes an ARP header and prints its contents to through the USART in a human readable format.
*
* \param[in] InDataStart Pointer to the start of an ARP packet header
*/
void DecodeARPHeader(void* InDataStart)
{
#if !defined(NO_DECODE_ARP)
ARP_Header_t* ARPHeader = (ARP_Header_t*)InDataStart;
printf_P(PSTR(" \\\r\n ARP\r\n"));
if (!(IP_COMPARE(&ARPHeader->TPA, &ServerIPAddress)) &&
!(MAC_COMPARE(&ARPHeader->THA, &ServerMACAddress)))
{
printf_P(PSTR(" + NOT ADDRESSED TO DEVICE\r\n"));
return;
}
printf_P(PSTR(" + Protocol: %x\r\n"), SwapEndian_16(ARPHeader->ProtocolType));
printf_P(PSTR(" + Operation: %u\r\n"), SwapEndian_16(ARPHeader->Operation));
if (SwapEndian_16(ARPHeader->ProtocolType) == ETHERTYPE_IPV4)
{
printf_P(PSTR(" + SHA MAC: %02X:%02X:%02X:%02X:%02X:%02X\r\n"), ARPHeader->SHA.Octets[0],
ARPHeader->SHA.Octets[1],
ARPHeader->SHA.Octets[2],
ARPHeader->SHA.Octets[3],
ARPHeader->SHA.Octets[4],
ARPHeader->SHA.Octets[5]);
printf_P(PSTR(" + SPA IP: %u.%u.%u.%u\r\n"), ARPHeader->SPA.Octets[0],
ARPHeader->SPA.Octets[1],
ARPHeader->SPA.Octets[2],
ARPHeader->SPA.Octets[3]);
printf_P(PSTR(" + THA MAC: %02X:%02X:%02X:%02X:%02X:%02X\r\n"), ARPHeader->THA.Octets[0],
ARPHeader->THA.Octets[1],
ARPHeader->THA.Octets[2],
ARPHeader->THA.Octets[3],
ARPHeader->THA.Octets[4],
ARPHeader->THA.Octets[5]);
printf_P(PSTR(" + TPA IP: %u.%u.%u.%u\r\n"), ARPHeader->TPA.Octets[0],
ARPHeader->TPA.Octets[1],
ARPHeader->TPA.Octets[2],
ARPHeader->TPA.Octets[3]);
}
#endif
}
/** Decodes an IP header and prints its contents to through the USART in a human readable format.
*
* \param[in] InDataStart Pointer to the start of an IP packet header
*/
void DecodeIPHeader(void* InDataStart)
{
#if !defined(NO_DECODE_IP)
IP_Header_t* IPHeader = (IP_Header_t*)InDataStart;
uint16_t HeaderLengthBytes = (IPHeader->HeaderLength * sizeof(uint32_t));
printf_P(PSTR(" \\\r\n IP\r\n"));
if (!(IP_COMPARE(&IPHeader->DestinationAddress, &ServerIPAddress)))
{
printf_P(PSTR(" + NOT ADDRESSED TO DEVICE\r\n"));
return;
}
printf_P(PSTR(" + Header Length: %u Bytes\r\n"), HeaderLengthBytes);
printf_P(PSTR(" + Packet Version: %u\r\n"), IPHeader->Version);
printf_P(PSTR(" + Total Length: %u\r\n"), SwapEndian_16(IPHeader->TotalLength));
printf_P(PSTR(" + Protocol: %u\r\n"), IPHeader->Protocol);
printf_P(PSTR(" + TTL: %u\r\n"), IPHeader->TTL);
printf_P(PSTR(" + IP Src: %u.%u.%u.%u\r\n"), IPHeader->SourceAddress.Octets[0],
IPHeader->SourceAddress.Octets[1],
IPHeader->SourceAddress.Octets[2],
IPHeader->SourceAddress.Octets[3]);
printf_P(PSTR(" + IP Dst: %u.%u.%u.%u\r\n"), IPHeader->DestinationAddress.Octets[0],
IPHeader->DestinationAddress.Octets[1],
IPHeader->DestinationAddress.Octets[2],
IPHeader->DestinationAddress.Octets[3]);
#endif
}
/** Decodes an ICMP header and prints its contents to through the USART in a human readable format.
*
* \param[in] InDataStart Pointer to the start of an ICMP packet header
*/
void DecodeICMPHeader(void* InDataStart)
{
#if !defined(NO_DECODE_ICMP)
ICMP_Header_t* ICMPHeader = (ICMP_Header_t*)InDataStart;
printf_P(PSTR(" \\\r\n ICMP\r\n"));
printf_P(PSTR(" + Type: %u\r\n"), ICMPHeader->Type);
printf_P(PSTR(" + Code: %u\r\n"), ICMPHeader->Code);
#endif
}
/** Decodes a TCP header and prints its contents to through the USART in a human readable format.
*
* \param[in] InDataStart Pointer to the start of a TCP packet header
*/
void DecodeTCPHeader(void* InDataStart)
{
#if !defined(NO_DECODE_TCP)
TCP_Header_t* TCPHeader = (TCP_Header_t*)InDataStart;
uint16_t HeaderLengthBytes = (TCPHeader->DataOffset * sizeof(uint32_t));
printf_P(PSTR(" \\\r\n TCP\r\n"));
printf_P(PSTR(" + Header Length: %u Bytes\r\n"), HeaderLengthBytes);
printf_P(PSTR(" + Source Port: %u\r\n"), SwapEndian_16(TCPHeader->SourcePort));
printf_P(PSTR(" + Destination Port: %u\r\n"), SwapEndian_16(TCPHeader->DestinationPort));
printf_P(PSTR(" + Sequence Number: %lu\r\n"), SwapEndian_32(TCPHeader->SequenceNumber));
printf_P(PSTR(" + Acknowledgment Number: %lu\r\n"), SwapEndian_32(TCPHeader->AcknowledgmentNumber));
printf_P(PSTR(" + Flags: 0x%02X\r\n"), TCPHeader->Flags);
if (TCP_GetPortState(TCPHeader->DestinationPort) == TCP_Port_Closed)
printf_P(PSTR(" + NOT LISTENING ON DESTINATION PORT\r\n"));
#endif
}
/** Decodes an UDP header and prints its contents to through the USART in a human readable format.
*
* \param[in] InDataStart Pointer to the start of a UDP packet header
*/
void DecodeUDPHeader(void* InDataStart)
{
#if !defined(NO_DECODE_UDP)
UDP_Header_t* UDPHeader = (UDP_Header_t*)InDataStart;
printf_P(PSTR(" \\\r\n UDP\r\n"));
printf_P(PSTR(" + Source Port: %u\r\n"), SwapEndian_16(UDPHeader->SourcePort));
printf_P(PSTR(" + Destination Port: %u\r\n"), SwapEndian_16(UDPHeader->DestinationPort));
printf_P(PSTR(" + Data Length: %d\r\n"), SwapEndian_16(UDPHeader->Length));
#endif
}
/** Decodes an DHCP header and prints its contents to through the USART in a human readable format.
*
* \param[in] InDataStart Pointer to the start of a DHCP packet header
*/
void DecodeDHCPHeader(void* InDataStart)
{
#if !defined(NO_DECODE_DHCP)
uint8_t* DHCPOptions = ((uint8_t*)InDataStart + sizeof(DHCP_Header_t));
printf_P(PSTR(" \\\r\n DHCP\r\n"));
while (DHCPOptions[0] != DHCP_OPTION_END)
{
if (DHCPOptions[0] == DHCP_OPTION_MESSAGETYPE)
{
switch (DHCPOptions[2])
{
case DHCP_MESSAGETYPE_DISCOVER:
printf_P(PSTR(" + DISCOVER\r\n"));
break;
case DHCP_MESSAGETYPE_REQUEST:
printf_P(PSTR(" + REQUEST\r\n"));
break;
case DHCP_MESSAGETYPE_RELEASE:
printf_P(PSTR(" + RELEASE\r\n"));
break;
case DHCP_MESSAGETYPE_DECLINE:
printf_P(PSTR(" + DECLINE\r\n"));
break;
}
}
DHCPOptions += ((DHCPOptions[0] == DHCP_OPTION_PAD) ? 1 : (DHCPOptions[1] + 2));
}
#endif
}