src/proto_struct.h

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * By Daniel Borkmann <daniel@netsniff-ng.org>.
   4  * Copyright (C) 2009, 2010 Daniel Borkmann
   5  * Copyright (C) 2012 Christoph Jaeger <christoph@netsniff-ng.org>
   6  * Subject to the GPL, version 2.
   7  */
   8
   9 #ifndef PROTO_H
  10 #define PROTO_H
  11
  12 #include <stdint.h>
  13
  14 #include "hash.h"
  15 #include "tprintf.h"
  16
  17 /* necessary forward declarations */
  18 struct pkt_buff;
  19 static inline unsigned int pkt_len(struct pkt_buff *pkt);
  20 static uint8_t *pkt_pull(struct pkt_buff *pkt, unsigned int len);
  21
  22 struct protocol {
  23         /* Needs to be filled out by user */
  24         unsigned int key;
  25         void (*print_full)     (struct pkt_buff *pkt);
  26         void (*print_less)     (struct pkt_buff *pkt);
  27         /* Used by program logic */
  28         struct protocol *next;
  29         void (*process)        (struct pkt_buff *pkt);
  30 };
  31
  32 static inline void empty(struct pkt_buff *pkt) {}
  33
  34 static inline void hex(struct pkt_buff *pkt)
  35 {
  36         uint8_t *buff;
  37         unsigned int len = pkt_len(pkt);
  38
  39         for (buff = pkt_pull(pkt, len); buff && len-- > 0; buff++)
  40                 tprintf("%.2x ", *buff);
  41 }
  42
  43 #endif /* PROTO_H */