src/ipfrag.h

   1 #ifndef IPTRAF_NG_IPFRAG_H
   2 #define IPTRAF_NG_IPFRAG_H
   3
   4 /***
   5
   6 ipfrag.h - IP fragmentation hander definitions
   7
   8 ***/
   9
  10 static inline unsigned int ipv4_frag_offset(struct iphdr *ip)
  11 {
  12         return (ntohs(ip->frag_off) & 0x1fff) * 8;
  13 }
  14
  15 static inline int ipv4_is_first_fragment(struct iphdr *ip)
  16 {
  17         return (ntohs(ip->frag_off) & 0x1fff) == 0;
  18 }
  19
  20 static inline int ipv4_is_fragmented(struct iphdr *ip)
  21 {
  22         return (ntohs(ip->frag_off) & 0x3fff) != 0;
  23 }
  24
  25 static inline int ipv4_more_fragments(struct iphdr *ip)
  26 {
  27         return (ntohs(ip->frag_off) & 0x2000) != 0;
  28 }
  29
  30 void destroyfraglist(void);
  31 unsigned int processfragment(struct iphdr *packet, in_port_t *sport,
  32                              in_port_t *dport, int *firstin);
  33
  34 #endif  /* IPTRAF_NG_IPFRAG_H */