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