1 | #include <machine/rtems-bsd-user-space.h> |
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2 | |
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3 | /* |
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4 | * Redistribution and use in source and binary forms, with or without |
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5 | * modification, are permitted provided that: (1) source code |
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6 | * distributions retain the above copyright notice and this paragraph |
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7 | * in its entirety, and (2) distributions including binary code include |
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8 | * the above copyright notice and this paragraph in its entirety in |
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9 | * the documentation or other materials provided with the distribution. |
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10 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND |
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11 | * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT |
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12 | * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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13 | * FOR A PARTICULAR PURPOSE. |
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14 | * |
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15 | * Original code by Francesco Fondelli (francesco dot fondelli, gmail dot com) |
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16 | */ |
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17 | |
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18 | #ifdef HAVE_CONFIG_H |
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19 | #include "config.h" |
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20 | #endif |
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21 | |
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22 | #include <tcpdump-stdinc.h> |
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23 | |
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24 | #include <stdio.h> |
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25 | #include <stdlib.h> |
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26 | |
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27 | #include "interface.h" |
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28 | #include "extract.h" |
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29 | #include "addrtoname.h" |
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30 | |
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31 | #include "udp.h" |
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32 | |
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33 | /* |
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34 | * VXLAN header, draft-mahalingam-dutt-dcops-vxlan-03 |
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35 | * |
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36 | * 0 1 2 3 |
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37 | * 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 |
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38 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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39 | * |R|R|R|R|I|R|R|R| Reserved | |
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40 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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41 | * | VXLAN Network Identifier (VNI) | Reserved | |
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42 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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43 | */ |
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44 | |
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45 | void |
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46 | vxlan_print(const u_char *bp, u_int len) |
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47 | { |
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48 | u_int8_t flags; |
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49 | u_int32_t vni; |
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50 | |
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51 | if (len < 8) { |
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52 | printf("[|VXLAN]"); |
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53 | return; |
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54 | } |
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55 | |
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56 | flags = *bp; |
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57 | bp += 4; |
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58 | |
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59 | vni = EXTRACT_24BITS(bp); |
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60 | bp += 4; |
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61 | |
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62 | printf("VXLAN, "); |
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63 | |
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64 | fputs("flags [", stdout); |
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65 | if (flags & 0x08) |
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66 | fputs("I", stdout); |
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67 | else |
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68 | fputs(".", stdout); |
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69 | fputs("] ", stdout); |
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70 | |
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71 | printf("(0x%02x), ", flags); |
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72 | printf("vni %u\n", vni); |
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73 | |
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74 | ether_print(gndo, bp, len - 8, len - 8, NULL, NULL); |
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75 | return; |
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76 | } |
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