usr/src/grub/grub-0.97/netboot/igmp.h

   1 #ifndef _IGMP_H
   2 #define _IGMP_H
   3
   4 /* Max interval between IGMP packets */
   5 #define IGMP_INTERVAL                   (10*TICKS_PER_SEC)
   6 #define IGMPv1_ROUTER_PRESENT_TIMEOUT   (400*TICKS_PER_SEC)
   7
   8 #define IGMP_QUERY      0x11
   9 #define IGMPv1_REPORT   0x12
  10 #define IGMPv2_REPORT   0x16
  11 #define IGMP_LEAVE      0x17
  12 #define GROUP_ALL_HOSTS 0xe0000001 /* 224.0.0.1 Host byte order */
  13
  14 struct igmp {
  15         uint8_t  type;
  16         uint8_t  response_time;
  17         uint16_t chksum;
  18         in_addr group;
  19 };
  20
  21 struct igmp_ip_t { /* Format of an igmp ip packet */
  22         struct iphdr ip;
  23         uint8_t router_alert[4]; /* Router alert option */
  24         struct igmp igmp;
  25 };
  26
  27 #endif  /* _IGMP_H */