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
  10 #include <pcap.h>
  11 #include <netinet/in_systm.h>   /* n_time */
  12 #define __USE_GNU 1
  13 #include <netinet/in.h> /* in_addr_t */
  14 #include <netinet/ip.h> /* struct ip */
  15
  16 #define PPP_HDR_LEN     4
  17 #define FDDI_HDR_LEN    21
  18 #define IP_HDR_LEN      sizeof(struct ip)
  19 #define IPV6_HDR_LEN    sizeof(struct ip6_hdr)
  20 #define TCP_HDR_LEN     sizeof(struct tcphdr)
  21 #define UDP_HDR_LEN     sizeof(struct udphdr)
  22 #define NULL_HDR_LEN    4
  23 #define PPPOE_HDR_LEN   8
  24 #define SLL_HDR_LEN     16
  25 #define RAW_HDR_LEN     0
  26
  27 #ifndef ETHER_ADDR_LEN
  28 #define ETHER_ADDR_LEN 6
  29 #endif
  30
  31 typedef struct {
  32    int linktype;
  33    unsigned int hdrlen;
  34    pcap_handler handler;
  35 } linkhdr_t;
  36
  37 const linkhdr_t *getlinkhdr(int linktype);
  38 int getsnaplen(const linkhdr_t *lh);
  39 char *ip_to_str(const in_addr_t ip);
  40 char *ip6_to_str(const struct in6_addr *ip6);
  41
  42 typedef struct {
  43    /* Fields are in host byte order (except IPs) */
  44    union {
  45       in_addr_t src_ip;
  46       struct in6_addr src_ip6;
  47    };
  48    union {
  49       in_addr_t dest_ip;
  50       struct in6_addr dest_ip6;
  51    };
  52    time_t time;
  53    uint16_t len;
  54    sa_family_t af;               /* AF_{UNSPEC, INET, INET6} */
  55    uint8_t proto;                /* IPPROTO_{TCP, UDP, ICMP} */
  56    uint8_t tcp_flags;            /* only for TCP */
  57    uint16_t src_port, dest_port; /* only for TCP, UDP */
  58    uint8_t src_mac[ETHER_ADDR_LEN],
  59            dst_mac[ETHER_ADDR_LEN]; /* only for Ethernet */
  60 } pktsummary;
  61
  62 /* vim:set ts=3 sw=3 tw=78 expandtab: */