The Tcpdump Group git mirrors - tcpdump/blob - print-sip.c

   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 Hannes Gredler (hannes@juniper.net)
  14  */
  15
  16 #define NETDISSECT_REWORKED
  17 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #include <tcpdump-stdinc.h>
  22
  23 #include "interface.h"
  24 #include "extract.h"
  25
  26 void
  27 sip_print(netdissect_options *ndo,
  28           register const u_char *pptr, register u_int len)
  29 {
  30     u_int idx;
  31
  32     ND_PRINT((ndo, "SIP, length: %u%s", len, ndo->ndo_vflag ? "\n\t" : ""));
  33
  34     /* in non-verbose mode just lets print the protocol and length */
  35     if (ndo->ndo_vflag < 1)
  36         return;
  37
  38     for (idx = 0; idx < len; idx++) {
  39         ND_TCHECK2(*(pptr+idx), 2);
  40         if (EXTRACT_16BITS(pptr+idx) != 0x0d0a) { /* linefeed ? */
  41             safeputchar(ndo, *(pptr + idx));
  42         } else {
  43             ND_PRINT((ndo, "\n\t"));
  44             idx+=1;
  45         }
  46     }
  47
  48     /* do we want to see an additionally hexdump ? */
  49     if (ndo->ndo_vflag > 1)
  50         print_unknown_data(ndo, pptr, "\n\t", len);
  51
  52     return;
  53
  54 trunc:
  55     ND_PRINT((ndo, "[|sip]"));
  56 }