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 "pkt_buff.h"
  13
  14 void empty(struct pkt_buff *pkt __maybe_unused) {}
  15
  16 static void _hex(uint8_t *ptr, size_t len)
  17 {
  18         if (!len)
  19                 return;
  20
  21         tprintf(" [ Hex ");
  22         for (; ptr && len-- > 0; ptr++)
  23                 tprintf(" %.2x", *ptr);
  24         tprintf(" ]\n");
  25 }
  26
  27 void hex(struct pkt_buff *pkt)
  28 {
  29         size_t len = pkt_len(pkt);
  30
  31         if (!len)
  32                 return;
  33
  34         _hex(pkt_pull(pkt, len), len);
  35         tprintf("\n");
  36 }
  37
  38 static void _ascii(uint8_t *ptr, size_t len)
  39 {
  40         if (!len)
  41                 return;
  42
  43         tprintf(" [ Chr ");
  44         for (; ptr && len-- > 0; ptr++)
  45                 tprintf("%c", isprint(*ptr) ? *ptr : '.');
  46         tprintf(" ]\n");
  47 }
  48
  49 void ascii(struct pkt_buff *pkt)
  50 {
  51         size_t len = pkt_len(pkt);
  52
  53         if (!len)
  54                 return;
  55
  56         _ascii(pkt_pull(pkt, len), len);
  57         tprintf("\n");
  58 }
  59
  60 void hex_ascii(struct pkt_buff *pkt)
  61 {
  62         size_t   len = pkt_len(pkt);
  63         uint8_t *ptr = pkt_pull(pkt, len);
  64
  65         if (len) {
  66                 _ascii(ptr, len);
  67                 _hex(ptr, len);
  68         }
  69
  70         tprintf("\n");
  71 }
  72
  73 static void none_less(struct pkt_buff *pkt __maybe_unused)
  74 {
  75         tprintf("\n");
  76 }
  77
  78 struct protocol none_ops = {
  79         .key = 0x01,
  80         .print_full = hex_ascii,
  81         .print_less = none_less,
  82 };