diff options
Diffstat (limited to 'include/linux/igmp.h')
| -rw-r--r-- | include/linux/igmp.h | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/include/linux/igmp.h b/include/linux/igmp.h new file mode 100644 index 00000000..82de336b --- /dev/null +++ b/include/linux/igmp.h @@ -0,0 +1,244 @@ +/* + * Linux NET3: Internet Group Management Protocol [IGMP] + * + * Authors: + * Alan Cox <alan@lxorguk.ukuu.org.uk> + * + * 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 <linux/types.h> +#include <asm/byteorder.h> + +/* + * IGMP protocol structures + */ + +/* + * Header in on cable format + */ + +struct igmphdr { + __u8 type; + __u8 code; /* For newer IGMP */ + __sum16 csum; + __be32 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; + __be16 grec_nsrcs; + __be32 grec_mca; + __be32 grec_src[0]; +}; + +struct igmpv3_report { + __u8 type; + __u8 resv1; + __be16 csum; + __be16 resv2; + __be16 ngrec; + struct igmpv3_grec grec[0]; +}; + +struct igmpv3_query { + __u8 type; + __u8 code; + __be16 csum; + __be32 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; + __be16 nsrcs; + __be32 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 0x12 */ +#define IGMP_HOST_LEAVE_MESSAGE 0x17 +#define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22 /* V3 version of 0x12 */ + +#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/timer.h> +#include <linux/in.h> + +static inline struct igmphdr *igmp_hdr(const struct sk_buff *skb) +{ + return (struct igmphdr *)skb_transport_header(skb); +} + +static inline struct igmpv3_report * + igmpv3_report_hdr(const struct sk_buff *skb) +{ + return (struct igmpv3_report *)skb_transport_header(skb); +} + +static inline struct igmpv3_query * + igmpv3_query_hdr(const struct sk_buff *skb) +{ + return (struct igmpv3_query *)skb_transport_header(skb); +} + +extern int sysctl_igmp_max_memberships; +extern int sysctl_igmp_max_msf; + +struct ip_sf_socklist { + unsigned int sl_max; + unsigned int sl_count; + struct rcu_head rcu; + __be32 sl_addr[0]; +}; + +#define IP_SFLSIZE(count) (sizeof(struct ip_sf_socklist) + \ + (count) * sizeof(__be32)) + +#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 __rcu *next_rcu; + struct ip_mreqn multi; + unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */ + struct ip_sf_socklist __rcu *sflist; + struct rcu_head rcu; +}; + +struct ip_sf_list { + struct ip_sf_list *sf_next; + __be32 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; + __be32 multiaddr; + unsigned int sfmode; + struct ip_sf_list *sources; + struct ip_sf_list *tomb; + unsigned long sfcount[2]; + union { + struct ip_mc_list *next; + struct ip_mc_list __rcu *next_rcu; + }; + 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; + struct rcu_head rcu; +}; + +/* 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))) << \ + (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_rcu(struct in_device *dev, __be32 mc_addr, __be32 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, __be32 local, __be32 rmt, int dif); +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_unmap(struct in_device *); +extern void ip_mc_remap(struct in_device *); +extern void ip_mc_dec_group(struct in_device *in_dev, __be32 addr); +extern void ip_mc_inc_group(struct in_device *in_dev, __be32 addr); +extern void ip_mc_rejoin_groups(struct in_device *in_dev); + +#endif +#endif |