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- /*
- * Linux NET3: Internet Group Management Protocol [IGMP]
- *
- * Authors:
- * Alan Cox <Alan.Cox@linux.org>
- *
- * Extended to talk the BSD extended IGMP protocol of mrouted 3.6
- *
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #ifndef _LINUX_IGMP_H
- #define _LINUX_IGMP_H
- /*
- * IGMP protocol structures
- */
- /*
- * Header in on cable format
- */
- struct igmphdr
- {
- __u8 type;
- __u8 code; /* For newer IGMP */
- __u16 csum;
- __u32 group;
- };
- #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* From RFC1112 */
- #define IGMP_HOST_MEMBERSHIP_REPORT 0x12 /* Ditto */
- #define IGMP_DVMRP 0x13 /* DVMRP routing */
- #define IGMP_PIM 0x14 /* PIM routing */
- #define IGMP_TRACE 0x15
- #define IGMP_HOST_NEW_MEMBERSHIP_REPORT 0x16 /* New version of 0x11 */
- #define IGMP_HOST_LEAVE_MESSAGE 0x17
- #define IGMP_MTRACE_RESP 0x1e
- #define IGMP_MTRACE 0x1f
- /*
- * Use the BSD names for these for compatibility
- */
- #define IGMP_DELAYING_MEMBER 0x01
- #define IGMP_IDLE_MEMBER 0x02
- #define IGMP_LAZY_MEMBER 0x03
- #define IGMP_SLEEPING_MEMBER 0x04
- #define IGMP_AWAKENING_MEMBER 0x05
- #define IGMP_MINLEN 8
- #define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */
- /* query (in seconds) */
- #define IGMP_TIMER_SCALE 10 /* denotes that the igmphdr->timer field */
- /* specifies time in 10th of seconds */
- #define IGMP_AGE_THRESHOLD 400 /* If this host don't hear any IGMP V1 */
- /* message in this period of time, */
- /* revert to IGMP v2 router. */
- #define IGMP_ALL_HOSTS htonl(0xE0000001L)
- #define IGMP_ALL_ROUTER htonl(0xE0000002L)
- #define IGMP_LOCAL_GROUP htonl(0xE0000000L)
- #define IGMP_LOCAL_GROUP_MASK htonl(0xFFFFFF00L)
- /*
- * struct for keeping the multicast list in
- */
- #ifdef __KERNEL__
- /* ip_mc_socklist is real list now. Speed is not argument;
- this list never used in fast path code
- */
- struct ip_mc_socklist
- {
- struct ip_mc_socklist *next;
- int count;
- struct ip_mreqn multi;
- };
- struct ip_mc_list
- {
- struct in_device *interface;
- unsigned long multiaddr;
- struct ip_mc_list *next;
- struct timer_list timer;
- int users;
- atomic_t refcnt;
- spinlock_t lock;
- char tm_running;
- char reporter;
- char unsolicit_count;
- char loaded;
- };
- extern int ip_check_mc(struct in_device *dev, u32 mc_addr);
- extern int igmp_rcv(struct sk_buff *);
- extern int ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr);
- extern int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr);
- extern void ip_mc_drop_socket(struct sock *sk);
- extern void ip_mr_init(void);
- extern void ip_mc_init_dev(struct in_device *);
- extern void ip_mc_destroy_dev(struct in_device *);
- extern void ip_mc_up(struct in_device *);
- extern void ip_mc_down(struct in_device *);
- extern void ip_mc_dec_group(struct in_device *in_dev, u32 addr);
- extern void ip_mc_inc_group(struct in_device *in_dev, u32 addr);
- #endif
- #endif
