linux/include/linux/igmp.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *	Linux NET3:	Internet Group Management Protocol  [IGMP]
 *
 *	Authors:
 *		Alan Cox <[email protected]>
 *
 *	Extended to talk the BSD extended IGMP protocol of mrouted 3.6
 */
#ifndef _LINUX_IGMP_H
#define _LINUX_IGMP_H

#include <linux/skbuff.h>
#include <linux/timer.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/refcount.h>
#include <linux/sockptr.h>
#include <uapi/linux/igmp.h>

static inline struct igmphdr *igmp_hdr(const struct sk_buff *skb)
{ … }

static inline struct igmpv3_report *
			igmpv3_report_hdr(const struct sk_buff *skb)
{ … }

static inline struct igmpv3_query *
			igmpv3_query_hdr(const struct sk_buff *skb)
{ … }

struct ip_sf_socklist { … };

#define IP_SFBLOCK …

/* 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_sf_list { … };

struct ip_mc_list { … };

/* V3 exponential field decoding */
#define IGMPV3_MASK(value, nb) …
#define IGMPV3_EXP(thresh, nbmant, nbexp, value) …

#define IGMPV3_QQIC(value) …
#define IGMPV3_MRC(value) …

static inline int ip_mc_may_pull(struct sk_buff *skb, unsigned int len)
{ … }

extern int ip_check_mc_rcu(struct in_device *dev, __be32 mc_addr, __be32 src_addr, u8 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_join_group_ssm(struct sock *sk, struct ip_mreqn *imr,
				unsigned int mode);
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,
			sockptr_t optval, sockptr_t optlen);
extern int ip_mc_gsfget(struct sock *sk, struct group_filter *gsf,
			sockptr_t optval, size_t offset);
extern int ip_mc_sf_allow(const struct sock *sk, __be32 local, __be32 rmt,
			  int dif, int sdif);
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, gfp_t gfp);
static inline 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,
			      gfp_t gfp);
extern void ip_mc_inc_group(struct in_device *in_dev, __be32 addr);
int ip_mc_check_igmp(struct sk_buff *skb);

#endif