diff --git a/usrsctplib/user_ip6_var.h b/usrsctplib/user_ip6_var.h
new file mode 100755
index 0000000..f5e4a60
--- /dev/null
+++ b/usrsctplib/user_ip6_var.h
@@ -0,0 +1,126 @@
+/*-
+ * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+/*-
+ * Copyright (c) 1982, 1986, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#ifndef _USER_IP6_VAR_H_
+#define _USER_IP6_VAR_H_
+
+#if defined(__Userspace_os_Windows)
+struct ip6_hdr {
+	union {
+		struct ip6_hdrctl {
+			u_int32_t ip6_un1_flow;	/* 20 bits of flow-ID */
+			u_int16_t ip6_un1_plen;	/* payload length */
+			u_int8_t  ip6_un1_nxt;	/* next header */
+			u_int8_t  ip6_un1_hlim;	/* hop limit */
+		} ip6_un1;
+		u_int8_t ip6_un2_vfc;	/* 4 bits version, top 4 bits class */
+	} ip6_ctlun;
+	struct in6_addr ip6_src;	/* source address */
+	struct in6_addr ip6_dst;	/* destination address */
+};
+#define ip6_vfc		ip6_ctlun.ip6_un2_vfc
+#define ip6_flow	ip6_ctlun.ip6_un1.ip6_un1_flow
+#define ip6_plen	ip6_ctlun.ip6_un1.ip6_un1_plen
+#define ip6_nxt		ip6_ctlun.ip6_un1.ip6_un1_nxt
+#define ip6_hlim	ip6_ctlun.ip6_un1.ip6_un1_hlim
+#define ip6_hops	ip6_ctlun.ip6_un1.ip6_un1_hlim
+
+#define IPV6_VERSION		0x60
+#endif
+
+#if defined(__Userspace_os_Windows)
+#define s6_addr16 u.Word
+#endif
+#if !defined(__Userspace_os_Windows)
+#if !defined(__Userspace_os_Linux)
+#define s6_addr8  __u6_addr.__u6_addr8
+#define s6_addr16 __u6_addr.__u6_addr16
+#define s6_addr32 __u6_addr.__u6_addr32
+#endif
+#endif
+
+#if !defined(__Userspace_os_FreeBSD) && !defined(__Userspace_os_OpenBSD) && !defined(__Userspace_os_DragonFly)
+struct route_in6 {
+	struct	rtentry *ro_rt;
+	struct	llentry *ro_lle;
+	struct	in6_addr *ro_ia6;
+	int		ro_flags;
+	struct	sockaddr_in6 ro_dst;
+};
+#endif
+#define IP6_EXTHDR_GET(val, typ, m, off, len) \
+do {									\
+	struct mbuf *t;							\
+	int tmp;							\
+	if ((m)->m_len >= (off) + (len))				\
+		(val) = (typ)(mtod((m), caddr_t) + (off));		\
+	else {								\
+		t = m_pulldown((m), (off), (len), &tmp);		\
+		if (t) {						\
+			KASSERT(t->m_len >= tmp + (len),		\
+			        ("m_pulldown malfunction"));		\
+			(val) = (typ)(mtod(t, caddr_t) + tmp);		\
+		} else {						\
+			(val) = (typ)NULL;				\
+			(m) = NULL;					\
+		}							\
+	}								\
+} while (0)
+
+#endif /* !_USER_IP6_VAR_H_ */