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