#ifndef _IGMP_H
#define _IGMP_H

/* Max interval between IGMP packets */
#define IGMP_INTERVAL                   (10*TICKS_PER_SEC)
#define IGMPv1_ROUTER_PRESENT_TIMEOUT   (400*TICKS_PER_SEC)

#define IGMP_QUERY      0x11
#define IGMPv1_REPORT   0x12
#define IGMPv2_REPORT   0x16
#define IGMP_LEAVE      0x17
#define GROUP_ALL_HOSTS 0xe0000001 /* 224.0.0.1 Host byte order */

struct igmp {
        uint8_t  type;
        uint8_t  response_time;
        uint16_t chksum;
        in_addr group;
};

struct igmp_ip_t { /* Format of an igmp ip packet */
        struct iphdr ip;
        uint8_t router_alert[4]; /* Router alert option */
        struct igmp igmp;
};

#endif  /* _IGMP_H */