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 } 75
