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This is a low-level network debugging utility that utilizes raw packet i/o to construct and deconstruct tcp, udp, ipv4, arp, and icmp packets over ethernet.
net/ethernet.h@0:d494b853ce97, 2010-10-12 (annotated)
- Committer:
- etherealflaim
- Date:
- Tue Oct 12 05:32:59 2010 +0000
- Revision:
- 0:d494b853ce97
- Child:
- 2:e8e09adc41fc
Initial Publish - Slightly unfinished, but usable
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
etherealflaim | 0:d494b853ce97 | 1 | #ifndef ETHERNET_H |
etherealflaim | 0:d494b853ce97 | 2 | #define ETHERNET_H |
etherealflaim | 0:d494b853ce97 | 3 | |
etherealflaim | 0:d494b853ce97 | 4 | #include "net.h" |
etherealflaim | 0:d494b853ce97 | 5 | |
etherealflaim | 0:d494b853ce97 | 6 | typedef struct { |
etherealflaim | 0:d494b853ce97 | 7 | unsigned char octet[6]; |
etherealflaim | 0:d494b853ce97 | 8 | } Ethernet_MAC; |
etherealflaim | 0:d494b853ce97 | 9 | |
etherealflaim | 0:d494b853ce97 | 10 | typedef struct { |
etherealflaim | 0:d494b853ce97 | 11 | // In the Ethernet II Framing Standard: |
etherealflaim | 0:d494b853ce97 | 12 | // Destination MAC address (6 octets) |
etherealflaim | 0:d494b853ce97 | 13 | Ethernet_MAC destination; |
etherealflaim | 0:d494b853ce97 | 14 | // Source MAC address (6 octets) |
etherealflaim | 0:d494b853ce97 | 15 | Ethernet_MAC source; |
etherealflaim | 0:d494b853ce97 | 16 | // (optional) VLAN Tag (unsupported) |
etherealflaim | 0:d494b853ce97 | 17 | // Ethernet type or length (only <0x600 or 0x0800 IPv4 supported) |
etherealflaim | 0:d494b853ce97 | 18 | u16 ethertype; |
etherealflaim | 0:d494b853ce97 | 19 | unsigned char payload[]; |
etherealflaim | 0:d494b853ce97 | 20 | } Ethernet_FrameHeader; |
etherealflaim | 0:d494b853ce97 | 21 | |
etherealflaim | 0:d494b853ce97 | 22 | inline void fix_endian_ethernet(Ethernet_FrameHeader *header) |
etherealflaim | 0:d494b853ce97 | 23 | { |
etherealflaim | 0:d494b853ce97 | 24 | fix_endian_u16(&header->ethertype); |
etherealflaim | 0:d494b853ce97 | 25 | } |
etherealflaim | 0:d494b853ce97 | 26 | |
etherealflaim | 0:d494b853ce97 | 27 | inline void print_ethernet(Ethernet_FrameHeader *frame) |
etherealflaim | 0:d494b853ce97 | 28 | { |
etherealflaim | 0:d494b853ce97 | 29 | main_log.printf("Ethernet frame:"); |
etherealflaim | 0:d494b853ce97 | 30 | u8 *src = frame->source.octet; |
etherealflaim | 0:d494b853ce97 | 31 | u8 *dst = frame->destination.octet; |
etherealflaim | 0:d494b853ce97 | 32 | main_log.printf(" Source: MAC - %02X:%02X:%02X:%02X:%02X:%02X", src[6], src[7], src[8], src[9], src[10], src[11]); |
etherealflaim | 0:d494b853ce97 | 33 | main_log.printf(" Dest: MAC - %02X:%02X:%02X:%02X:%02X:%02X", dst[0], dst[1], dst[2], dst[3], dst[4], dst[5]); |
etherealflaim | 0:d494b853ce97 | 34 | main_log.printf(" Ethertype: 0x%04X", frame->ethertype); |
etherealflaim | 0:d494b853ce97 | 35 | } |
etherealflaim | 0:d494b853ce97 | 36 | |
etherealflaim | 0:d494b853ce97 | 37 | #endif |