unix4lyfe git - darkstat/blob - decode.h

   1 /* darkstat 3
   2  * copyright (c) 2001-2009 Emil Mikulic.
   3  *
   4  * decode.h: packet decoding.
   5  *
   6  * You may use, modify and redistribute this file under the terms of the
   7  * GNU General Public License version 2. (see COPYING.GPL)
   8  */
   9 #ifndef __DARKSTAT_DECODE_H
  10 #define __DARKSTAT_DECODE_H
  11
  12 #include <pcap.h>
  13 #include <netinet/in_systm.h>   /* n_time */
  14 #define __USE_GNU 1
  15 #include <netinet/in.h> /* for <netinet/ip.h>  */
  16 #include <netinet/ip.h> /* struct ip */
  17
  18 #include "hosts_db.h"   /* addr46 */
  19
  20 #define PPP_HDR_LEN     4
  21 #define FDDI_HDR_LEN    21
  22 #define IP_HDR_LEN      sizeof(struct ip)
  23 #define IPV6_HDR_LEN    sizeof(struct ip6_hdr)
  24 #define TCP_HDR_LEN     sizeof(struct tcphdr)
  25 #define UDP_HDR_LEN     sizeof(struct udphdr)
  26 #define NULL_HDR_LEN    4
  27 #define PPPOE_HDR_LEN   8
  28 #define SLL_HDR_LEN     16
  29 #define RAW_HDR_LEN     0
  30
  31 #ifndef ETHER_ADDR_LEN
  32 #define ETHER_ADDR_LEN 6
  33 #endif
  34
  35 #ifndef IPPROTO_OSPF
  36 #  define IPPROTO_OSPF 89
  37 #endif
  38
  39 struct linkhdr {
  40    int linktype;
  41    unsigned int hdrlen;
  42    pcap_handler handler;
  43 };
  44
  45 const struct linkhdr *getlinkhdr(const int linktype);
  46 int getsnaplen(const struct linkhdr *lh);
  47 char *ip_to_str(const struct addr46 *const ip);
  48 char *ip_to_str_af(const void *const addr, sa_family_t af);
  49
  50 typedef struct {
  51    /* Fields are in host byte order (except IPs) */
  52    union {
  53       struct in_addr src_ip;
  54       struct in6_addr src_ip6;
  55    };
  56    union {
  57       struct in_addr dest_ip;
  58       struct in6_addr dest_ip6;
  59    };
  60    time_t time;
  61    uint16_t len;
  62    sa_family_t af;               /* AF_{UNSPEC, INET, INET6} */
  63    uint8_t proto;                /* IPPROTO_{TCP, UDP, ICMP} */
  64    uint8_t tcp_flags;            /* only for TCP */
  65    uint16_t src_port, dest_port; /* only for TCP, UDP */
  66    uint8_t src_mac[ETHER_ADDR_LEN],
  67            dst_mac[ETHER_ADDR_LEN]; /* only for Ethernet */
  68 } pktsummary;
  69
  70 #endif /* __DARKSTAT_DECODE_H */
  71 /* vim:set ts=3 sw=3 tw=78 expandtab: */