| /* |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that: (1) source code |
| * distributions retain the above copyright notice and this paragraph |
| * in its entirety, and (2) distributions including binary code include |
| * the above copyright notice and this paragraph in its entirety in |
| * the documentation or other materials provided with the distribution. |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND |
| * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT |
| * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE. |
| * |
| * Original code by Francesco Fondelli (francesco dot fondelli, gmail dot com) |
| */ |
| |
| #define NETDISSECT_REWORKED |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <tcpdump-stdinc.h> |
| |
| #include "interface.h" |
| #include "extract.h" |
| |
| /* |
| * VXLAN header, RFC7348 |
| * Virtual eXtensible Local Area Network (VXLAN): A Framework |
| * for Overlaying Virtualized Layer 2 Networks over Layer 3 Networks |
| * |
| * 0 1 2 3 |
| * 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 |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * |R|R|R|R|I|R|R|R| Reserved | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | VXLAN Network Identifier (VNI) | Reserved | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| */ |
| |
| void |
| vxlan_print(netdissect_options *ndo, const u_char *bp, u_int len) |
| { |
| uint8_t flags; |
| uint32_t vni; |
| |
| if (len < 8) { |
| ND_PRINT((ndo, "[|VXLAN]")); |
| return; |
| } |
| |
| flags = *bp; |
| bp += 4; |
| |
| vni = EXTRACT_24BITS(bp); |
| bp += 4; |
| |
| ND_PRINT((ndo, "VXLAN, ")); |
| ND_PRINT((ndo, "flags [%s] (0x%02x), ", flags & 0x08 ? "I" : ".", flags)); |
| ND_PRINT((ndo, "vni %u\n", vni)); |
| |
| ether_print(ndo, bp, len - 8, len - 8, NULL, NULL); |
| } |