v4.19.13 snapshot.
diff --git a/include/linux/igmp.h b/include/linux/igmp.h
new file mode 100644
index 0000000..119f539
--- /dev/null
+++ b/include/linux/igmp.h
@@ -0,0 +1,135 @@
+/*
+ * 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/skbuff.h>
+#include <linux/timer.h>
+#include <linux/in.h>
+#include <linux/refcount.h>
+#include <uapi/linux/igmp.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);
+}
+
+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 ip_mc_list __rcu *next_hash;
+ struct timer_list timer;
+ int users;
+ refcount_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, 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,
+ 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, 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);
+extern void ip_mc_inc_group(struct in_device *in_dev, __be32 addr);
+int ip_mc_check_igmp(struct sk_buff *skb, struct sk_buff **skb_trimmed);
+
+#endif