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 14struct igmp { 15 uint8_t type; 16 uint8_t response_time; 17 uint16_t chksum; 18 in_addr group; 19}; 20 21struct 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 */ 28