v4.19.13 snapshot.
diff --git a/include/uapi/linux/igmp.h b/include/uapi/linux/igmp.h
new file mode 100644
index 0000000..7e44ac0
--- /dev/null
+++ b/include/uapi/linux/igmp.h
@@ -0,0 +1,129 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ * 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 _UAPI_LINUX_IGMP_H
+#define _UAPI_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;
+ __sum16 csum;
+ __be16 resv2;
+ __be16 ngrec;
+ struct igmpv3_grec grec[0];
+};
+
+struct igmpv3_query {
+ __u8 type;
+ __u8 code;
+ __sum16 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
+ */
+
+#endif /* _UAPI_LINUX_IGMP_H */