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Diffstat (limited to 'FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/tools/tcp_dump_packets.md')
-rw-r--r-- | FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/tools/tcp_dump_packets.md | 72 |
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diff --git a/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/tools/tcp_dump_packets.md b/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/tools/tcp_dump_packets.md new file mode 100644 index 000000000..e2b56f705 --- /dev/null +++ b/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/tools/tcp_dump_packets.md @@ -0,0 +1,72 @@ +tcp_dump_packets.c dumps network packets in a C source file. + +It is written to be added to the "pc" project ( Windows simulator ). It uses the file system to write 2 C source files: + + PacketList.c + PacketList.h + +How to include 'tcp_dump_packets' into a project: + +● Make sure that tools/tcp_dump_packets.c is added to the source files +● See if Network Interface has been adapted to call: + `iptraceDUMP_PACKET( ucBuffer, xLength, pdTRUE ); /* Incoming packet. */` + `iptraceDUMP_PACKET( ucBuffer, xLength, pdFALSE ); /* Outgoing packet. */` +● Once the network is up, call `dump_packet_init()` with a file name and a pointer to + `DumpEntries_t`, which contains the requirements. For instance like this: + static DumpEntries_t xExampleEntries = { + .uxEntryCount = 4, /* No more than 'dumpMAX_DUMP_ENTRIES' elements. */ + .xEntries = { + { .ulMask = flag_IN | flag_UDP, .uxMax = 2u }, + { .ulMask = flag_IN | flag_ARP, .uxMax = 2u }, + { .ulMask = flag_IN | flag_TCP, .uxMax = 5u }, + { .ulMask = flag_IN | flag_SYN, .uxMax = 1u }, + } + }; +● Add the following lines to FreeRTOSIPConfig.h : + #define ipconfigUSE_DUMP_PACKETS ( 1 ) + #include "../tools/tcp_dump_packets.h" + +Later on, the module can disabled by simply setting `ipconfigUSE_DUMP_PACKETS` to `0`. + +Here is some contents of the output file: + + /* Packet_0001 */ + uint8_t ucPacket_0001[ 60 ] = + { + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x74, 0xb5, 0x7e, 0xf0, 0x47, 0xee, 0x08, 0x06, 0x00, 0x01, + 0x08, 0x00, 0x06, 0x04, 0x00, 0x01, 0x74, 0xb5, 0x7e, 0xf0, 0x47, 0xee, 0xc0, 0xa8, 0x02, 0x01, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0xa8, 0x02, 0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 + }; + + DumpPacket_t xPacket_0001 = + { + .pucData = ucPacket_0001, + .uxLength = 60, + .ulType = 0x6840, /* IN | FRAME_ARP | ARP | REQUEST */ + }; + /*-----------------------------------------------------------*/ + +tcp_dump_packets has an enum of all possible properties of network packets: + ICMP4, ICMP6, UDP, TCP, DNS, REPLY, REQUEST, SYN, + FIN, RST, ACK, IN, OUT, ARP, FRAME_ARP, FRAME_4, and FRAME_6 + +Each property is defined as a bit so they can be combined as in: + .ulType = 0x6840, /* IN | FRAME_ARP | ARP | REQUEST */ + +Finishing: when there are enough packets of all required types, an array is added to the C-source output: + + DumpPacket_t *xPacketList[ dumpPACKET_COUNT ] = + { + &xPacket_0000, + &xPacket_0001, + &xPacket_0002, + &xPacket_0003, + &xPacket_0004, + &xPacket_0005, + &xPacket_0006, + &xPacket_0007, + &xPacket_0008, + }; + +The new source file PacketList.{c, h} can be used in testing software as sample packets. |