JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Redistribution and use in source and binary forms, with or without |
| 3 | * modification, are permitted provided that: (1) source code |
| 4 | * distributions retain the above copyright notice and this paragraph |
| 5 | * in its entirety, and (2) distributions including binary code include |
| 6 | * the above copyright notice and this paragraph in its entirety in |
| 7 | * the documentation or other materials provided with the distribution. |
| 8 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND |
| 9 | * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT |
| 10 | * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 11 | * FOR A PARTICULAR PURPOSE. |
| 12 | * |
| 13 | * Original code by Francesco Fondelli (francesco dot fondelli, gmail dot com) |
| 14 | */ |
| 15 | |
| 16 | #ifdef HAVE_CONFIG_H |
| 17 | #include "config.h" |
| 18 | #endif |
| 19 | |
| 20 | #include <tcpdump-stdinc.h> |
| 21 | |
| 22 | #include <stdio.h> |
| 23 | #include <stdlib.h> |
| 24 | |
| 25 | #include "interface.h" |
| 26 | #include "extract.h" |
| 27 | #include "addrtoname.h" |
| 28 | |
| 29 | #include "udp.h" |
| 30 | |
| 31 | /* |
| 32 | * VXLAN header, draft-mahalingam-dutt-dcops-vxlan-03 |
| 33 | * |
| 34 | * 0 1 2 3 |
| 35 | * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 36 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 37 | * |R|R|R|R|I|R|R|R| Reserved | |
| 38 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 39 | * | VXLAN Network Identifier (VNI) | Reserved | |
| 40 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 41 | */ |
| 42 | |
| 43 | void |
| 44 | vxlan_print(const u_char *bp, u_int len) |
| 45 | { |
| 46 | u_int8_t flags; |
| 47 | u_int32_t vni; |
| 48 | |
| 49 | if (len < 8) { |
| 50 | printf("[|VXLAN]"); |
| 51 | return; |
| 52 | } |
| 53 | |
| 54 | flags = *bp; |
| 55 | bp += 4; |
| 56 | |
| 57 | vni = EXTRACT_24BITS(bp); |
| 58 | bp += 4; |
| 59 | |
| 60 | printf("VXLAN, "); |
| 61 | |
| 62 | fputs("flags [", stdout); |
| 63 | if (flags & 0x08) |
| 64 | fputs("I", stdout); |
| 65 | else |
| 66 | fputs(".", stdout); |
| 67 | fputs("] ", stdout); |
| 68 | |
| 69 | printf("(0x%02x), ", flags); |
| 70 | printf("vni %u\n", vni); |
| 71 | |
| 72 | ether_print(gndo, bp, len - 8, len - 8, NULL, NULL); |
| 73 | return; |
| 74 | } |