The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2001 William C. Fenner. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that: (1) source code |
| 7 | * distributions retain the above copyright notice and this paragraph |
| 8 | * in its entirety, and (2) distributions including binary code include |
| 9 | * the above copyright notice and this paragraph in its entirety in |
| 10 | * the documentation or other materials provided with the distribution. |
| 11 | * The name of William C. Fenner may not be used to endorse or |
| 12 | * promote products derived from this software without specific prior |
| 13 | * written permission. THIS SOFTWARE IS PROVIDED ``AS IS'' AND |
| 14 | * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT |
| 15 | * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 16 | * FOR A PARTICULAR PURPOSE. |
| 17 | */ |
| 18 | #ifndef lint |
| 19 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 20 | "@(#) $Header: /tcpdump/master/tcpdump/print-msdp.c,v 1.7 2005-04-06 21:32:41 mcr Exp $"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 21 | #endif |
| 22 | |
| 23 | #ifdef HAVE_CONFIG_H |
| 24 | #include "config.h" |
| 25 | #endif |
| 26 | |
| 27 | #include <tcpdump-stdinc.h> |
| 28 | |
| 29 | #include <stdio.h> |
| 30 | #include <stdlib.h> |
| 31 | |
| 32 | #include "interface.h" |
| 33 | #include "addrtoname.h" |
| 34 | #include "extract.h" |
| 35 | |
| 36 | #define MSDP_TYPE_MAX 7 |
| 37 | |
| 38 | void |
| 39 | msdp_print(const unsigned char *sp, u_int length) |
| 40 | { |
| 41 | unsigned int type, len; |
| 42 | |
| 43 | TCHECK2(*sp, 3); |
| 44 | /* See if we think we're at the beginning of a compound packet */ |
| 45 | type = *sp; |
| 46 | len = EXTRACT_16BITS(sp + 1); |
| 47 | if (len > 1500 || len < 3 || type == 0 || type > MSDP_TYPE_MAX) |
| 48 | goto trunc; /* not really truncated, but still not decodable */ |
| 49 | (void)printf(" msdp:"); |
| 50 | while (length > 0) { |
| 51 | TCHECK2(*sp, 3); |
| 52 | type = *sp; |
| 53 | len = EXTRACT_16BITS(sp + 1); |
| 54 | if (len > 1400 || vflag) |
| 55 | printf(" [len %u]", len); |
| 56 | if (len < 3) |
| 57 | goto trunc; |
| 58 | sp += 3; |
| 59 | length -= 3; |
| 60 | switch (type) { |
| 61 | case 1: /* IPv4 Source-Active */ |
| 62 | case 3: /* IPv4 Source-Active Response */ |
| 63 | if (type == 1) |
| 64 | (void)printf(" SA"); |
| 65 | else |
| 66 | (void)printf(" SA-Response"); |
| 67 | TCHECK(*sp); |
| 68 | (void)printf(" %u entries", *sp); |
| 69 | if ((u_int)((*sp * 12) + 8) < len) { |
| 70 | (void)printf(" [w/data]"); |
| 71 | if (vflag > 1) { |
| 72 | (void)printf(" "); |
| 73 | ip_print(gndo, sp + *sp * 12 + 8 - 3, |
| 74 | len - (*sp * 12 + 8)); |
| 75 | } |
| 76 | } |
| 77 | break; |
| 78 | case 2: |
| 79 | (void)printf(" SA-Request"); |
| 80 | TCHECK2(*sp, 5); |
| 81 | (void)printf(" for %s", ipaddr_string(sp + 1)); |
| 82 | break; |
| 83 | case 4: |
| 84 | (void)printf(" Keepalive"); |
| 85 | if (len != 3) |
| 86 | (void)printf("[len=%d] ", len); |
| 87 | break; |
| 88 | case 5: |
| 89 | (void)printf(" Notification"); |
| 90 | break; |
| 91 | default: |
| 92 | (void)printf(" [type=%d len=%d]", type, len); |
| 93 | break; |
| 94 | } |
| 95 | sp += (len - 3); |
| 96 | length -= (len - 3); |
| 97 | } |
| 98 | return; |
| 99 | trunc: |
| 100 | (void)printf(" [|msdp]"); |
| 101 | } |
| 102 | |
| 103 | /* |
| 104 | * Local Variables: |
| 105 | * c-style: whitesmith |
| 106 | * c-basic-offset: 8 |
| 107 | * End: |
| 108 | */ |