src/proto_none.c

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * By Daniel Borkmann <daniel@netsniff-ng.org>
   4  * Copyright 2009, 2010 Daniel Borkmann.
   5  * Subject to the GPL, version 2.
   6  */
   7
   8 #include <stdio.h>
   9 #include <stdint.h>
  10 #include <ctype.h>
  11
  12 #include "proto.h"
  13 #include "protos.h"
  14 #include "pkt_buff.h"
  15
  16 void empty(struct pkt_buff *pkt) {}
  17
  18 static void _hex(uint8_t *ptr, size_t len)
  19 {
  20         if (!len)
  21                 return;
  22
  23         tprintf(" [ hex ");
  24         for (; ptr && len-- > 0; ptr++)
  25                 tprintf(" %.2x", *ptr);
  26         tprintf(" ]\n");
  27 }
  28
  29 void hex(struct pkt_buff *pkt)
  30 {
  31         size_t len = pkt_len(pkt);
  32
  33         if (!len)
  34                 return;
  35
  36         _hex(pkt_pull(pkt, len), len);
  37         tprintf("\n");
  38 }
  39
  40 static void _ascii(uint8_t *ptr, size_t len)
  41 {
  42         if (!len)
  43                 return;
  44
  45         tprintf(" [ chr ");
  46         for (; ptr && len-- > 0; ptr++)
  47                 tprintf("%c", isprint(*ptr) ? *ptr : '.');
  48         tprintf(" ]\n");
  49 }
  50
  51 void ascii(struct pkt_buff *pkt)
  52 {
  53         size_t len = pkt_len(pkt);
  54
  55         if (!len)
  56                 return;
  57
  58         _ascii(pkt_pull(pkt, len), len);
  59         tprintf("\n");
  60 }
  61
  62 void hex_ascii(struct pkt_buff *pkt)
  63 {
  64         size_t   len = pkt_len(pkt);
  65         uint8_t *ptr = pkt_pull(pkt, len);
  66
  67         if (len) {
  68                 _ascii(ptr, len);
  69                 _hex(ptr, len);
  70         }
  71
  72         tprintf("\n");
  73 }
  74
  75 static void none_less(struct pkt_buff *pkt)
  76 {
  77         tprintf("\n");
  78 }
  79
  80 struct protocol none_ops = {
  81         .key = 0x01,
  82         .print_full = hex_ascii,
  83         .print_less = none_less,
  84 };
  85
  86 EXPORT_SYMBOL(none_ops);