Demos/Device/ClassDriver/RNDISEthernet/Lib/ProtocolDecoders.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2017.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaims all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /* Protocol decoders for Ethernet, TCP, IP, ICMP and ARP. Each of these routines
  32    accepts a header to the appropriate protocol and prints out pertinent information
  33    on the packet through the serial port.
  34
  35    To disable printing of a specific protocol, define the token NO_DECODE_{Protocol}
  36    in the project makefile, and pass it to the compiler using the -D switch.
  37 */
  38
  39 /** \file
  40  *
  41  *  Protocol decoding routines, for the plain-text decoding of Ethernet frames for debugging purposes.
  42  *  Enabled protocol decoders will print incoming Ethernet frame contents through the USART in a human
  43  *  readable format.
  44  *
  45  *  Note that the USART is a slow transmission medium, and will slow down packet processing considerably.
  46  *  Packet decoding routines can be disabled by defining NO_DECODE_{Protocol Name} in the project makefile
  47  *  and passing it to the compiler via the -D switch.
  48  */
  49
  50 #include "ProtocolDecoders.h"
  51
  52 /** Decodes an Ethernet frame header and prints its contents to through the USART in a human readable format.
  53  *
  54  *  \param[in] InDataStart  Pointer to the start of an Ethernet frame of data
  55  */
  56 void DecodeEthernetFrameHeader(void* InDataStart)
  57 {
  58         #if !defined(NO_DECODE_ETHERNET)
  59         Ethernet_Frame_Header_t* FrameHeader = (Ethernet_Frame_Header_t*)InDataStart;
  60
  61         printf_P(PSTR("\r\n"));
  62
  63         printf_P(PSTR("  ETHERNET\r\n"));
  64
  65         if (!(MAC_COMPARE(&FrameHeader->Destination, &ServerMACAddress)) &&
  66             !(MAC_COMPARE(&FrameHeader->Destination, &BroadcastMACAddress)))
  67         {
  68                 printf_P(PSTR("  + NOT ADDRESSED TO DEVICE\r\n"));
  69                 return;
  70         }
  71
  72         printf_P(PSTR("  + MAC Source : %02X:%02X:%02X:%02X:%02X:%02X\r\n"), FrameHeader->Source.Octets[0],
  73                                                                              FrameHeader->Source.Octets[1],
  74                                                                              FrameHeader->Source.Octets[2],
  75                                                                              FrameHeader->Source.Octets[3],
  76                                                                              FrameHeader->Source.Octets[4],
  77                                                                              FrameHeader->Source.Octets[5]);
  78
  79         printf_P(PSTR("  + MAC Dest: %02X:%02X:%02X:%02X:%02X:%02X\r\n"),    FrameHeader->Destination.Octets[0],
  80                                                                              FrameHeader->Destination.Octets[1],
  81                                                                              FrameHeader->Destination.Octets[2],
  82                                                                              FrameHeader->Destination.Octets[3],
  83                                                                              FrameHeader->Destination.Octets[4],
  84                                                                              FrameHeader->Destination.Octets[5]);
  85
  86         printf_P(PSTR("  + Protocol: 0x%04x\r\n"), SwapEndian_16(FrameHeader->EtherType));
  87         #endif
  88 }
  89
  90 /** Decodes an ARP header and prints its contents to through the USART in a human readable format.
  91  *
  92  *  \param[in] InDataStart  Pointer to the start of an ARP packet header
  93  */
  94 void DecodeARPHeader(void* InDataStart)
  95 {
  96         #if !defined(NO_DECODE_ARP)
  97         ARP_Header_t* ARPHeader = (ARP_Header_t*)InDataStart;
  98
  99         printf_P(PSTR("   \\\r\n    ARP\r\n"));
 100
 101         if (!(IP_COMPARE(&ARPHeader->TPA, &ServerIPAddress)) &&
 102             !(MAC_COMPARE(&ARPHeader->THA, &ServerMACAddress)))
 103         {
 104                 printf_P(PSTR("    + NOT ADDRESSED TO DEVICE\r\n"));
 105                 return;
 106         }
 107
 108         printf_P(PSTR("    + Protocol: %x\r\n"), SwapEndian_16(ARPHeader->ProtocolType));
 109         printf_P(PSTR("    + Operation: %u\r\n"), SwapEndian_16(ARPHeader->Operation));
 110
 111         if (SwapEndian_16(ARPHeader->ProtocolType) == ETHERTYPE_IPV4)
 112         {
 113                 printf_P(PSTR("    + SHA MAC: %02X:%02X:%02X:%02X:%02X:%02X\r\n"), ARPHeader->SHA.Octets[0],
 114                                                                                    ARPHeader->SHA.Octets[1],
 115                                                                                    ARPHeader->SHA.Octets[2],
 116                                                                                    ARPHeader->SHA.Octets[3],
 117                                                                                    ARPHeader->SHA.Octets[4],
 118                                                                                    ARPHeader->SHA.Octets[5]);
 119
 120                 printf_P(PSTR("    + SPA IP: %u.%u.%u.%u\r\n"), ARPHeader->SPA.Octets[0],
 121                                                                 ARPHeader->SPA.Octets[1],
 122                                                                 ARPHeader->SPA.Octets[2],
 123                                                                 ARPHeader->SPA.Octets[3]);
 124
 125                 printf_P(PSTR("    + THA MAC: %02X:%02X:%02X:%02X:%02X:%02X\r\n"), ARPHeader->THA.Octets[0],
 126                                                                                    ARPHeader->THA.Octets[1],
 127                                                                                    ARPHeader->THA.Octets[2],
 128                                                                                    ARPHeader->THA.Octets[3],
 129                                                                                    ARPHeader->THA.Octets[4],
 130                                                                                    ARPHeader->THA.Octets[5]);
 131
 132                 printf_P(PSTR("    + TPA IP: %u.%u.%u.%u\r\n"), ARPHeader->TPA.Octets[0],
 133                                                                 ARPHeader->TPA.Octets[1],
 134                                                                 ARPHeader->TPA.Octets[2],
 135                                                                 ARPHeader->TPA.Octets[3]);
 136         }
 137         #endif
 138 }
 139
 140 /** Decodes an IP header and prints its contents to through the USART in a human readable format.
 141  *
 142  *  \param[in] InDataStart  Pointer to the start of an IP packet header
 143  */
 144 void DecodeIPHeader(void* InDataStart)
 145 {
 146         #if !defined(NO_DECODE_IP)
 147         IP_Header_t* IPHeader  = (IP_Header_t*)InDataStart;
 148
 149         uint16_t HeaderLengthBytes = (IPHeader->HeaderLength * sizeof(uint32_t));
 150
 151         printf_P(PSTR("   \\\r\n    IP\r\n"));
 152
 153         if (!(IP_COMPARE(&IPHeader->DestinationAddress, &ServerIPAddress)))
 154         {
 155                 printf_P(PSTR("    + NOT ADDRESSED TO DEVICE\r\n"));
 156                 return;
 157         }
 158
 159         printf_P(PSTR("    + Header Length: %u Bytes\r\n"), HeaderLengthBytes);
 160         printf_P(PSTR("    + Packet Version: %u\r\n"), IPHeader->Version);
 161         printf_P(PSTR("    + Total Length: %u\r\n"), SwapEndian_16(IPHeader->TotalLength));
 162
 163         printf_P(PSTR("    + Protocol: %u\r\n"), IPHeader->Protocol);
 164         printf_P(PSTR("    + TTL: %u\r\n"), IPHeader->TTL);
 165
 166         printf_P(PSTR("    + IP Src: %u.%u.%u.%u\r\n"), IPHeader->SourceAddress.Octets[0],
 167                                                         IPHeader->SourceAddress.Octets[1],
 168                                                         IPHeader->SourceAddress.Octets[2],
 169                                                         IPHeader->SourceAddress.Octets[3]);
 170
 171         printf_P(PSTR("    + IP Dst: %u.%u.%u.%u\r\n"), IPHeader->DestinationAddress.Octets[0],
 172                                                         IPHeader->DestinationAddress.Octets[1],
 173                                                         IPHeader->DestinationAddress.Octets[2],
 174                                                         IPHeader->DestinationAddress.Octets[3]);
 175         #endif
 176 }
 177
 178 /** Decodes an ICMP header and prints its contents to through the USART in a human readable format.
 179  *
 180  *  \param[in] InDataStart  Pointer to the start of an ICMP packet header
 181  */
 182 void DecodeICMPHeader(void* InDataStart)
 183 {
 184         #if !defined(NO_DECODE_ICMP)
 185         ICMP_Header_t* ICMPHeader  = (ICMP_Header_t*)InDataStart;
 186
 187         printf_P(PSTR("    \\\r\n     ICMP\r\n"));
 188
 189         printf_P(PSTR("     + Type: %u\r\n"), ICMPHeader->Type);
 190         printf_P(PSTR("     + Code: %u\r\n"), ICMPHeader->Code);
 191         #endif
 192 }
 193
 194 /** Decodes a TCP header and prints its contents to through the USART in a human readable format.
 195  *
 196  *  \param[in] InDataStart  Pointer to the start of a TCP packet header
 197  */
 198 void DecodeTCPHeader(void* InDataStart)
 199 {
 200         #if !defined(NO_DECODE_TCP)
 201         TCP_Header_t* TCPHeader  = (TCP_Header_t*)InDataStart;
 202
 203         uint16_t               HeaderLengthBytes = (TCPHeader->DataOffset * sizeof(uint32_t));
 204
 205         printf_P(PSTR("    \\\r\n     TCP\r\n"));
 206
 207         printf_P(PSTR("     + Header Length: %u Bytes\r\n"), HeaderLengthBytes);
 208
 209         printf_P(PSTR("     + Source Port: %u\r\n"), SwapEndian_16(TCPHeader->SourcePort));
 210         printf_P(PSTR("     + Destination Port: %u\r\n"), SwapEndian_16(TCPHeader->DestinationPort));
 211
 212         printf_P(PSTR("     + Sequence Number: %lu\r\n"), SwapEndian_32(TCPHeader->SequenceNumber));
 213         printf_P(PSTR("     + Acknowledgment Number: %lu\r\n"), SwapEndian_32(TCPHeader->AcknowledgmentNumber));
 214
 215         printf_P(PSTR("     + Flags: 0x%02X\r\n"), TCPHeader->Flags);
 216
 217         if (TCP_GetPortState(TCPHeader->DestinationPort) == TCP_Port_Closed)
 218           printf_P(PSTR("     + NOT LISTENING ON DESTINATION PORT\r\n"));
 219         #endif
 220 }
 221
 222 /** Decodes an UDP header and prints its contents to through the USART in a human readable format.
 223  *
 224  *  \param[in] InDataStart  Pointer to the start of a UDP packet header
 225  */
 226 void DecodeUDPHeader(void* InDataStart)
 227 {
 228         #if !defined(NO_DECODE_UDP)
 229         UDP_Header_t* UDPHeader = (UDP_Header_t*)InDataStart;
 230
 231         printf_P(PSTR("    \\\r\n     UDP\r\n"));
 232
 233         printf_P(PSTR("     + Source Port: %u\r\n"), SwapEndian_16(UDPHeader->SourcePort));
 234         printf_P(PSTR("     + Destination Port: %u\r\n"), SwapEndian_16(UDPHeader->DestinationPort));
 235
 236         printf_P(PSTR("     + Data Length: %d\r\n"), SwapEndian_16(UDPHeader->Length));
 237         #endif
 238 }
 239
 240 /** Decodes an DHCP header and prints its contents to through the USART in a human readable format.
 241  *
 242  *  \param[in] InDataStart  Pointer to the start of a DHCP packet header
 243  */
 244 void DecodeDHCPHeader(void* InDataStart)
 245 {
 246         #if !defined(NO_DECODE_DHCP)
 247         uint8_t* DHCPOptions = ((uint8_t*)InDataStart + sizeof(DHCP_Header_t));
 248
 249         printf_P(PSTR("     \\\r\n      DHCP\r\n"));
 250
 251         while (DHCPOptions[0] != DHCP_OPTION_END)
 252         {
 253                 if (DHCPOptions[0] == DHCP_OPTION_MESSAGETYPE)
 254                 {
 255                         switch (DHCPOptions[2])
 256                         {
 257                                 case DHCP_MESSAGETYPE_DISCOVER:
 258                                         printf_P(PSTR("      + DISCOVER\r\n"));
 259                                         break;
 260                                 case DHCP_MESSAGETYPE_REQUEST:
 261                                         printf_P(PSTR("      + REQUEST\r\n"));
 262                                         break;
 263                                 case DHCP_MESSAGETYPE_RELEASE:
 264                                         printf_P(PSTR("      + RELEASE\r\n"));
 265                                         break;
 266                                 case DHCP_MESSAGETYPE_DECLINE:
 267                                         printf_P(PSTR("      + DECLINE\r\n"));
 268                                         break;
 269                         }
 270                 }
 271
 272                 DHCPOptions += ((DHCPOptions[0] == DHCP_OPTION_PAD) ? 1 : (DHCPOptions[1] + 2));
 273         }
 274
 275         #endif
 276 }
 277