proto_none.c

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