igmp.h
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上传日期:2009-04-28
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文件大小:6k
- /*
- * 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
- #include <asm/byteorder.h>
- /*
- * IGMP protocol structures
- */
- /*
- * Header in on cable format
- */
- struct igmphdr
- {
- __u8 type;
- __u8 code; /* For newer IGMP */
- __u16 csum;
- __u32 group;
- };
- /* V3 group record types [grec_type] */
- #define IGMPV3_MODE_IS_INCLUDE 1
- #define IGMPV3_MODE_IS_EXCLUDE 2
- #define IGMPV3_CHANGE_TO_INCLUDE 3
- #define IGMPV3_CHANGE_TO_EXCLUDE 4
- #define IGMPV3_ALLOW_NEW_SOURCES 5
- #define IGMPV3_BLOCK_OLD_SOURCES 6
- struct igmpv3_grec {
- __u8 grec_type;
- __u8 grec_auxwords;
- __u16 grec_nsrcs;
- __u32 grec_mca;
- __u32 grec_src[0];
- };
- struct igmpv3_report {
- __u8 type;
- __u8 resv1;
- __u16 csum;
- __u16 resv2;
- __u16 ngrec;
- struct igmpv3_grec grec[0];
- };
- struct igmpv3_query {
- __u8 type;
- __u8 code;
- __u16 csum;
- __u32 group;
- #if defined(__LITTLE_ENDIAN_BITFIELD)
- __u8 qrv:3,
- suppress:1,
- resv:4;
- #elif defined(__BIG_ENDIAN_BITFIELD)
- __u8 resv:4,
- suppress:1,
- qrv:3;
- #else
- #error "Please fix <asm/byteorder.h>"
- #endif
- __u8 qqic;
- __u16 nsrcs;
- __u32 srcs[0];
- };
- #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 IGMPV2_HOST_MEMBERSHIP_REPORT 0x16 /* V2 version of 0x11 */
- #define IGMP_HOST_LEAVE_MESSAGE 0x17
- #define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22 /* V3 version of 0x11 */
- #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 IGMPV3_ALL_MCR htonl(0xE0000016L)
- #define IGMP_LOCAL_GROUP htonl(0xE0000000L)
- #define IGMP_LOCAL_GROUP_MASK htonl(0xFFFFFF00L)
- /*
- * struct for keeping the multicast list in
- */
- #ifdef __KERNEL__
- #include <linux/skbuff.h>
- #include <linux/in.h>
- extern int sysctl_igmp_max_memberships;
- extern int sysctl_igmp_max_msf;
- struct ip_sf_socklist
- {
- unsigned int sl_max;
- unsigned int sl_count;
- __u32 sl_addr[0];
- };
- #define IP_SFLSIZE(count) (sizeof(struct ip_sf_socklist) +
- (count) * sizeof(__u32))
- #define IP_SFBLOCK 10 /* allocate this many at once */
- /* 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;
- struct ip_mreqn multi;
- unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
- struct ip_sf_socklist *sflist;
- };
- struct ip_sf_list
- {
- struct ip_sf_list *sf_next;
- __u32 sf_inaddr;
- unsigned long sf_count[2]; /* include/exclude counts */
- unsigned char sf_gsresp; /* include in g & s response? */
- unsigned char sf_oldin; /* change state */
- unsigned char sf_crcount; /* retrans. left to send */
- };
- struct ip_mc_list
- {
- struct in_device *interface;
- unsigned long multiaddr;
- struct ip_sf_list *sources;
- struct ip_sf_list *tomb;
- unsigned int sfmode;
- unsigned long sfcount[2];
- 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;
- unsigned char gsquery; /* check source marks? */
- unsigned char crcount;
- };
- /* V3 exponential field decoding */
- #define IGMPV3_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
- #define IGMPV3_EXP(thresh, nbmant, nbexp, value)
- ((value) < (thresh) ? (value) :
- ((IGMPV3_MASK(value, nbmant) | (1<<(nbmant+nbexp))) <<
- (IGMPV3_MASK((value) >> (nbmant), nbexp) + (nbexp))))
- #define IGMPV3_QQIC(value) IGMPV3_EXP(0x80, 4, 3, value)
- #define IGMPV3_MRC(value) IGMPV3_EXP(0x80, 4, 3, value)
- extern int ip_check_mc(struct in_device *dev, u32 mc_addr, u32 src_addr, u16 proto);
- 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 int ip_mc_source(int add, int omode, struct sock *sk,
- struct ip_mreq_source *mreqs, int ifindex);
- extern int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf,int ifindex);
- extern int ip_mc_msfget(struct sock *sk, struct ip_msfilter *msf,
- struct ip_msfilter __user *optval, int __user *optlen);
- extern int ip_mc_gsfget(struct sock *sk, struct group_filter *gsf,
- struct group_filter __user *optval, int __user *optlen);
- extern int ip_mc_sf_allow(struct sock *sk, u32 local, u32 rmt, int dif);
- 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