Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

2 files changed, 1827 insertions, 0 deletions

diff --git a/netwerk/sctp/src/netinet6/sctp6_usrreq.c b/netwerk/sctp/src/netinet6/sctp6_usrreq.c
new file mode 100644
index 0000000000..e130b41aca
--- /dev/null
+++ b/netwerk/sctp/src/netinet6/sctp6_usrreq.c
@@ -0,0 +1,1745 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
+ * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
+ * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * a) Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * b) 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.
+ *
+ * c) Neither the name of Cisco Systems, Inc. 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
+ */
+
+#include <netinet/sctp_os.h>
+#ifdef INET6
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+#include <sys/proc.h>
+#endif
+#include <netinet/sctp_pcb.h>
+#include <netinet/sctp_header.h>
+#include <netinet/sctp_var.h>
+#include <netinet6/sctp6_var.h>
+#include <netinet/sctp_sysctl.h>
+#include <netinet/sctp_output.h>
+#include <netinet/sctp_uio.h>
+#include <netinet/sctp_asconf.h>
+#include <netinet/sctputil.h>
+#include <netinet/sctp_indata.h>
+#include <netinet/sctp_timer.h>
+#include <netinet/sctp_auth.h>
+#include <netinet/sctp_input.h>
+#include <netinet/sctp_output.h>
+#include <netinet/sctp_bsd_addr.h>
+#include <netinet/sctp_crc32.h>
+#if !defined(_WIN32)
+#include <netinet/icmp6.h>
+#include <netinet/udp.h>
+#endif
+#if defined(__Userspace__)
+int ip6_v6only=0;
+#endif
+#if defined(__Userspace__)
+#ifdef INET
+void
+in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
+{
+#if defined(_WIN32)
+	uint32_t temp;
+#endif
+	memset(sin, 0, sizeof(*sin));
+#ifdef HAVE_SIN_LEN
+	sin->sin_len = sizeof(struct sockaddr_in);
+#endif
+	sin->sin_family = AF_INET;
+	sin->sin_port = sin6->sin6_port;
+#if defined(_WIN32)
+	temp = sin6->sin6_addr.s6_addr16[7];
+	temp = temp << 16;
+	temp = temp | sin6->sin6_addr.s6_addr16[6];
+	sin->sin_addr.s_addr = temp;
+#else
+	sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
+#endif
+}
+
+void
+in6_sin6_2_sin_in_sock(struct sockaddr *nam)
+{
+	struct sockaddr_in *sin_p;
+	struct sockaddr_in6 sin6;
+
+	/* save original sockaddr_in6 addr and convert it to sockaddr_in  */
+	sin6 = *(struct sockaddr_in6 *)nam;
+	sin_p = (struct sockaddr_in *)nam;
+	in6_sin6_2_sin(sin_p, &sin6);
+}
+
+void
+in6_sin_2_v4mapsin6(const struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
+{
+	memset(sin6, 0, sizeof(struct sockaddr_in6));
+	sin6->sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+	sin6->sin6_len = sizeof(struct sockaddr_in6);
+#endif
+	sin6->sin6_port = sin->sin_port;
+#if defined(_WIN32)
+	((uint32_t *)&sin6->sin6_addr)[0] = 0;
+	((uint32_t *)&sin6->sin6_addr)[1] = 0;
+	((uint32_t *)&sin6->sin6_addr)[2] = htonl(0xffff);
+	((uint32_t *)&sin6->sin6_addr)[3] = sin->sin_addr.s_addr;
+#else
+	sin6->sin6_addr.s6_addr32[0] = 0;
+	sin6->sin6_addr.s6_addr32[1] = 0;
+	sin6->sin6_addr.s6_addr32[2] = htonl(0xffff);
+	sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
+#endif
+}
+#endif
+#endif
+
+#if !defined(__Userspace__)
+int
+#if defined(__APPLE__) || defined(__FreeBSD__)
+sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port)
+#else
+sctp6_input(struct mbuf **i_pak, int *offp, int proto)
+#endif
+{
+	struct mbuf *m;
+	int iphlen;
+	uint32_t vrf_id;
+	uint8_t ecn_bits;
+	struct sockaddr_in6 src, dst;
+	struct ip6_hdr *ip6;
+	struct sctphdr *sh;
+	struct sctp_chunkhdr *ch;
+	int length, offset;
+	uint8_t compute_crc;
+#if defined(__FreeBSD__)
+	uint32_t mflowid;
+	uint8_t mflowtype;
+	uint16_t fibnum;
+#endif
+#if !(defined(__APPLE__) || defined(__FreeBSD__))
+	uint16_t port = 0;
+#endif
+
+	iphlen = *offp;
+	if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) {
+		SCTP_RELEASE_PKT(*i_pak);
+		return (IPPROTO_DONE);
+	}
+	m = SCTP_HEADER_TO_CHAIN(*i_pak);
+#ifdef SCTP_MBUF_LOGGING
+	/* Log in any input mbufs */
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+		sctp_log_mbc(m, SCTP_MBUF_INPUT);
+	}
+#endif
+#ifdef SCTP_PACKET_LOGGING
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
+		sctp_packet_log(m);
+	}
+#endif
+#if defined(__FreeBSD__)
+	SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
+	        "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
+	        m->m_pkthdr.len,
+	        if_name(m->m_pkthdr.rcvif),
+	        (int)m->m_pkthdr.csum_flags, CSUM_BITS);
+#endif
+#if defined(__APPLE__)
+	SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
+	        "sctp6_input(): Packet of length %d received on %s%d with csum_flags 0x%x.\n",
+	        m->m_pkthdr.len,
+	        m->m_pkthdr.rcvif->if_name,
+	        m->m_pkthdr.rcvif->if_unit,
+	        m->m_pkthdr.csum_flags);
+#endif
+#if defined(_WIN32) && !defined(__Userspace__)
+	SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
+	        "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%x.\n",
+	        m->m_pkthdr.len,
+	        m->m_pkthdr.rcvif->if_xname,
+	        m->m_pkthdr.csum_flags);
+#endif
+#if defined(__FreeBSD__)
+	mflowid = m->m_pkthdr.flowid;
+	mflowtype = M_HASHTYPE_GET(m);
+	fibnum = M_GETFIB(m);
+#endif
+	SCTP_STAT_INCR(sctps_recvpackets);
+	SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
+	/* Get IP, SCTP, and first chunk header together in the first mbuf. */
+	offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
+	if (m->m_len < offset) {
+		m = m_pullup(m, offset);
+		if (m == NULL) {
+			SCTP_STAT_INCR(sctps_hdrops);
+			return (IPPROTO_DONE);
+		}
+	}
+	ip6 = mtod(m, struct ip6_hdr *);
+	sh = (struct sctphdr *)(mtod(m, caddr_t) + iphlen);
+	ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
+	offset -= sizeof(struct sctp_chunkhdr);
+	memset(&src, 0, sizeof(struct sockaddr_in6));
+	src.sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+	src.sin6_len = sizeof(struct sockaddr_in6);
+#endif
+	src.sin6_port = sh->src_port;
+	src.sin6_addr = ip6->ip6_src;
+#if defined(__FreeBSD__)
+#if defined(__APPLE__)
+	/* XXX: This code should also be used on Apple */
+#endif
+	if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
+		goto out;
+	}
+#endif
+	memset(&dst, 0, sizeof(struct sockaddr_in6));
+	dst.sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+	dst.sin6_len = sizeof(struct sockaddr_in6);
+#endif
+	dst.sin6_port = sh->dest_port;
+	dst.sin6_addr = ip6->ip6_dst;
+#if defined(__FreeBSD__)
+#if defined(__APPLE__)
+	/* XXX: This code should also be used on Apple */
+#endif
+	if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
+		goto out;
+	}
+#endif
+#if defined(__APPLE__)
+#if defined(NFAITH) && 0 < NFAITH
+	if (faithprefix(&dst.sin6_addr)) {
+		goto out;
+	}
+#endif
+#endif
+	length = ntohs(ip6->ip6_plen) + iphlen;
+	/* Validate mbuf chain length with IP payload length. */
+	if (SCTP_HEADER_LEN(m) != length) {
+		SCTPDBG(SCTP_DEBUG_INPUT1,
+		        "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
+		SCTP_STAT_INCR(sctps_hdrops);
+		goto out;
+	}
+	if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+		goto out;
+	}
+#if defined(__FreeBSD__)
+	ecn_bits = IPV6_TRAFFIC_CLASS(ip6);
+	if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
+		SCTP_STAT_INCR(sctps_recvhwcrc);
+		compute_crc = 0;
+	} else {
+#else
+	ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff);
+	if (SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
+	    (IN6_ARE_ADDR_EQUAL(&src.sin6_addr, &dst.sin6_addr))) {
+		SCTP_STAT_INCR(sctps_recvhwcrc);
+		compute_crc = 0;
+	} else {
+#endif
+		SCTP_STAT_INCR(sctps_recvswcrc);
+		compute_crc = 1;
+	}
+	sctp_common_input_processing(&m, iphlen, offset, length,
+	                             (struct sockaddr *)&src,
+	                             (struct sockaddr *)&dst,
+	                             sh, ch,
+	                             compute_crc,
+	                             ecn_bits,
+#if defined(__FreeBSD__)
+	                             mflowtype, mflowid, fibnum,
+#endif
+	                             vrf_id, port);
+ out:
+	if (m) {
+		sctp_m_freem(m);
+	}
+	return (IPPROTO_DONE);
+}
+
+#if defined(__APPLE__)
+int
+sctp6_input(struct mbuf **i_pak, int *offp)
+{
+	return (sctp6_input_with_port(i_pak, offp, 0));
+}
+#endif
+#if defined(__FreeBSD__)
+int
+sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED)
+{
+	return (sctp6_input_with_port(i_pak, offp, 0));
+}
+#endif
+
+void
+sctp6_notify(struct sctp_inpcb *inp,
+             struct sctp_tcb *stcb,
+             struct sctp_nets *net,
+             uint8_t icmp6_type,
+             uint8_t icmp6_code,
+             uint32_t next_mtu)
+{
+#if defined(__APPLE__)
+	struct socket *so;
+#endif
+	int timer_stopped;
+
+	switch (icmp6_type) {
+	case ICMP6_DST_UNREACH:
+		if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) ||
+		    (icmp6_code == ICMP6_DST_UNREACH_ADMIN) ||
+		    (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) ||
+		    (icmp6_code == ICMP6_DST_UNREACH_ADDR)) {
+			/* Mark the net unreachable. */
+			if (net->dest_state & SCTP_ADDR_REACHABLE) {
+				/* Ok that destination is not reachable */
+				net->dest_state &= ~SCTP_ADDR_REACHABLE;
+				net->dest_state &= ~SCTP_ADDR_PF;
+				sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
+				                stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED);
+			}
+		}
+		SCTP_TCB_UNLOCK(stcb);
+		break;
+	case ICMP6_PARAM_PROB:
+		/* Treat it like an ABORT. */
+		if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) {
+			sctp_abort_notification(stcb, true, false, 0, NULL, SCTP_SO_NOT_LOCKED);
+#if defined(__APPLE__)
+			so = SCTP_INP_SO(inp);
+			atomic_add_int(&stcb->asoc.refcnt, 1);
+			SCTP_TCB_UNLOCK(stcb);
+			SCTP_SOCKET_LOCK(so, 1);
+			SCTP_TCB_LOCK(stcb);
+			atomic_subtract_int(&stcb->asoc.refcnt, 1);
+#endif
+			(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
+					      SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2);
+#if defined(__APPLE__)
+			SCTP_SOCKET_UNLOCK(so, 1);
+#endif
+		} else {
+			SCTP_TCB_UNLOCK(stcb);
+		}
+		break;
+	case ICMP6_PACKET_TOO_BIG:
+		if (net->dest_state & SCTP_ADDR_NO_PMTUD) {
+			SCTP_TCB_UNLOCK(stcb);
+			break;
+		}
+		if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) {
+			timer_stopped = 1;
+			sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
+			                SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1);
+		} else {
+			timer_stopped = 0;
+		}
+		/* Update the path MTU. */
+		if (net->port) {
+			next_mtu -= sizeof(struct udphdr);
+		}
+		if (net->mtu > next_mtu) {
+			net->mtu = next_mtu;
+#if defined(__FreeBSD__)
+			if (net->port) {
+				sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu + sizeof(struct udphdr));
+			} else {
+				sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu);
+			}
+#endif
+		}
+		/* Update the association MTU */
+		if (stcb->asoc.smallest_mtu > next_mtu) {
+			sctp_pathmtu_adjustment(stcb, next_mtu, true);
+		}
+		/* Finally, start the PMTU timer if it was running before. */
+		if (timer_stopped) {
+			sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
+		}
+		SCTP_TCB_UNLOCK(stcb);
+		break;
+	default:
+		SCTP_TCB_UNLOCK(stcb);
+		break;
+	}
+}
+
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+void
+sctp6_ctlinput(struct ip6ctlparam *ip6cp)
+{
+	struct sctp_inpcb *inp;
+	struct sctp_tcb *stcb;
+	struct sctp_nets *net;
+	struct sctphdr sh;
+	struct sockaddr_in6 src, dst;
+
+	if (icmp6_errmap(ip6cp->ip6c_icmp6) == 0) {
+		return;
+	}
+
+	/*
+	 * Check if we can safely examine the ports and the
+	 * verification tag of the SCTP common header.
+	 */
+	if (ip6cp->ip6c_m->m_pkthdr.len <
+	    (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) {
+		return;
+	}
+
+	/* Copy out the port numbers and the verification tag. */
+	memset(&sh, 0, sizeof(sh));
+	m_copydata(ip6cp->ip6c_m,
+	           ip6cp->ip6c_off,
+	           sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
+	           (caddr_t)&sh);
+	memset(&src, 0, sizeof(struct sockaddr_in6));
+	src.sin6_family = AF_INET6;
+	src.sin6_len = sizeof(struct sockaddr_in6);
+	src.sin6_port = sh.src_port;
+	src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
+	if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
+		return;
+	}
+	memset(&dst, 0, sizeof(struct sockaddr_in6));
+	dst.sin6_family = AF_INET6;
+	dst.sin6_len = sizeof(struct sockaddr_in6);
+	dst.sin6_port = sh.dest_port;
+	dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
+	if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
+		return;
+	}
+	inp = NULL;
+	net = NULL;
+	stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
+	                                    (struct sockaddr *)&src,
+	                                    &inp, &net, 1, SCTP_DEFAULT_VRFID);
+	if ((stcb != NULL) &&
+	    (net != NULL) &&
+	    (inp != NULL)) {
+		/* Check the verification tag */
+		if (ntohl(sh.v_tag) != 0) {
+			/*
+			 * This must be the verification tag used for
+			 * sending out packets. We don't consider
+			 * packets reflecting the verification tag.
+			 */
+			if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
+				SCTP_TCB_UNLOCK(stcb);
+				return;
+			}
+		} else {
+			if (ip6cp->ip6c_m->m_pkthdr.len >=
+			    ip6cp->ip6c_off + sizeof(struct sctphdr) +
+			                      sizeof(struct sctp_chunkhdr) +
+			                      offsetof(struct sctp_init, a_rwnd)) {
+				/*
+				 * In this case we can check if we
+				 * got an INIT chunk and if the
+				 * initiate tag matches.
+				 */
+				uint32_t initiate_tag;
+				uint8_t chunk_type;
+
+				m_copydata(ip6cp->ip6c_m,
+				           ip6cp->ip6c_off +
+				           sizeof(struct sctphdr),
+				           sizeof(uint8_t),
+				           (caddr_t)&chunk_type);
+				m_copydata(ip6cp->ip6c_m,
+				           ip6cp->ip6c_off +
+				           sizeof(struct sctphdr) +
+				           sizeof(struct sctp_chunkhdr),
+				           sizeof(uint32_t),
+				           (caddr_t)&initiate_tag);
+				if ((chunk_type != SCTP_INITIATION) ||
+				    (ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
+					SCTP_TCB_UNLOCK(stcb);
+					return;
+				}
+			} else {
+				SCTP_TCB_UNLOCK(stcb);
+				return;
+			}
+		}
+		sctp6_notify(inp, stcb, net,
+		             ip6cp->ip6c_icmp6->icmp6_type,
+		             ip6cp->ip6c_icmp6->icmp6_code,
+		             ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
+	} else {
+		if ((stcb == NULL) && (inp != NULL)) {
+			/* reduce inp's ref-count */
+			SCTP_INP_WLOCK(inp);
+			SCTP_INP_DECR_REF(inp);
+			SCTP_INP_WUNLOCK(inp);
+		}
+		if (stcb) {
+			SCTP_TCB_UNLOCK(stcb);
+		}
+	}
+}
+#else
+void
+#if defined(__APPLE__) && !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION) && !defined(APPLE_ELCAPITAN)
+sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d, struct ifnet *ifp SCTP_UNUSED)
+#else
+sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d)
+#endif
+{
+	struct ip6ctlparam *ip6cp;
+	struct sctp_inpcb *inp;
+	struct sctp_tcb *stcb;
+	struct sctp_nets *net;
+	struct sctphdr sh;
+	struct sockaddr_in6 src, dst;
+
+#ifdef HAVE_SA_LEN
+	if (pktdst->sa_family != AF_INET6 ||
+	    pktdst->sa_len != sizeof(struct sockaddr_in6)) {
+#else
+	if (pktdst->sa_family != AF_INET6) {
+#endif
+		return;
+	}
+
+	if ((unsigned)cmd >= PRC_NCMDS) {
+		return;
+	}
+	if (PRC_IS_REDIRECT(cmd)) {
+		d = NULL;
+	} else if (inet6ctlerrmap[cmd] == 0) {
+		return;
+	}
+	/* If the parameter is from icmp6, decode it. */
+	if (d != NULL) {
+		ip6cp = (struct ip6ctlparam *)d;
+	} else {
+		ip6cp = (struct ip6ctlparam *)NULL;
+	}
+
+	if (ip6cp != NULL) {
+		/*
+		 * XXX: We assume that when IPV6 is non NULL, M and OFF are
+		 * valid.
+		 */
+		if (ip6cp->ip6c_m == NULL) {
+			return;
+		}
+
+		/* Check if we can safely examine the ports and the
+		 * verification tag of the SCTP common header.
+		 */
+		if (ip6cp->ip6c_m->m_pkthdr.len <
+		    (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) {
+			return;
+		}
+
+		/* Copy out the port numbers and the verification tag. */
+		memset(&sh, 0, sizeof(sh));
+		m_copydata(ip6cp->ip6c_m,
+		           ip6cp->ip6c_off,
+		           sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
+		           (caddr_t)&sh);
+		memset(&src, 0, sizeof(struct sockaddr_in6));
+		src.sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+		src.sin6_len = sizeof(struct sockaddr_in6);
+#endif
+		src.sin6_port = sh.src_port;
+		src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
+		memset(&dst, 0, sizeof(struct sockaddr_in6));
+		dst.sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+		dst.sin6_len = sizeof(struct sockaddr_in6);
+#endif
+		dst.sin6_port = sh.dest_port;
+		dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
+		inp = NULL;
+		net = NULL;
+		stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
+		                                    (struct sockaddr *)&src,
+		                                    &inp, &net, 1, SCTP_DEFAULT_VRFID);
+		if ((stcb != NULL) &&
+		    (net != NULL) &&
+		    (inp != NULL)) {
+			/* Check the verification tag */
+			if (ntohl(sh.v_tag) != 0) {
+				/*
+				 * This must be the verification tag used for
+				 * sending out packets. We don't consider
+				 * packets reflecting the verification tag.
+				 */
+				if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
+					SCTP_TCB_UNLOCK(stcb);
+					return;
+				}
+			} else {
+				SCTP_TCB_UNLOCK(stcb);
+				return;
+			}
+			sctp6_notify(inp, stcb, net,
+			             ip6cp->ip6c_icmp6->icmp6_type,
+			             ip6cp->ip6c_icmp6->icmp6_code,
+			             ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
+#if defined(__Userspace__)
+			if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
+			    (stcb->sctp_socket != NULL)) {
+				struct socket *upcall_socket;
+
+				upcall_socket = stcb->sctp_socket;
+				SOCK_LOCK(upcall_socket);
+				soref(upcall_socket);
+				SOCK_UNLOCK(upcall_socket);
+				if ((upcall_socket->so_upcall != NULL) &&
+				    (upcall_socket->so_error != 0)) {
+					(*upcall_socket->so_upcall)(upcall_socket, upcall_socket->so_upcallarg, M_NOWAIT);
+				}
+				ACCEPT_LOCK();
+				SOCK_LOCK(upcall_socket);
+				sorele(upcall_socket);
+			}
+#endif
+		} else {
+			if ((stcb == NULL) && (inp != NULL)) {
+				/* reduce inp's ref-count */
+				SCTP_INP_WLOCK(inp);
+				SCTP_INP_DECR_REF(inp);
+				SCTP_INP_WUNLOCK(inp);
+			}
+			if (stcb) {
+				SCTP_TCB_UNLOCK(stcb);
+			}
+		}
+	}
+}
+#endif
+#endif
+
+/*
+ * this routine can probably be collasped into the one in sctp_userreq.c
+ * since they do the same thing and now we lookup with a sockaddr
+ */
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+static int
+sctp6_getcred(SYSCTL_HANDLER_ARGS)
+{
+	struct xucred xuc;
+	struct sockaddr_in6 addrs[2];
+	struct sctp_inpcb *inp;
+	struct sctp_nets *net;
+	struct sctp_tcb *stcb;
+	int error;
+	uint32_t vrf_id;
+
+	vrf_id = SCTP_DEFAULT_VRFID;
+
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	error = priv_check(req->td, PRIV_NETINET_GETCRED);
+#else
+	error = suser(req->p);
+#endif
+	if (error)
+		return (error);
+
+	if (req->newlen != sizeof(addrs)) {
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+		return (EINVAL);
+	}
+	if (req->oldlen != sizeof(struct ucred)) {
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+		return (EINVAL);
+	}
+	error = SYSCTL_IN(req, addrs, sizeof(addrs));
+	if (error)
+		return (error);
+
+	stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
+	    sin6tosa(&addrs[0]),
+	    &inp, &net, 1, vrf_id);
+	if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
+		if ((inp != NULL) && (stcb == NULL)) {
+			/* reduce ref-count */
+			SCTP_INP_WLOCK(inp);
+			SCTP_INP_DECR_REF(inp);
+			goto cred_can_cont;
+		}
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
+		error = ENOENT;
+		goto out;
+	}
+	SCTP_TCB_UNLOCK(stcb);
+	/* We use the write lock here, only
+	 * since in the error leg we need it.
+	 * If we used RLOCK, then we would have
+	 * to wlock/decr/unlock/rlock. Which
+	 * in theory could create a hole. Better
+	 * to use higher wlock.
+	 */
+	SCTP_INP_WLOCK(inp);
+ cred_can_cont:
+	error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
+	if (error) {
+		SCTP_INP_WUNLOCK(inp);
+		goto out;
+	}
+	cru2x(inp->sctp_socket->so_cred, &xuc);
+	SCTP_INP_WUNLOCK(inp);
+	error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
+out:
+	return (error);
+}
+
+SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred,
+    CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
+    0, 0, sctp6_getcred, "S,ucred",
+    "Get the ucred of a SCTP6 connection");
+#endif
+
+#if defined(__Userspace__)
+int
+sctp6_attach(struct socket *so, int proto SCTP_UNUSED, uint32_t vrf_id)
+#elif defined(__FreeBSD__)
+static int
+sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
+#elif defined(_WIN32)
+static int
+sctp6_attach(struct socket *so, int proto SCTP_UNUSED, PKTHREAD p SCTP_UNUSED)
+#else
+static int
+sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct proc *p SCTP_UNUSED)
+#endif
+{
+	int error;
+	struct sctp_inpcb *inp;
+#if !defined(__Userspace__)
+	uint32_t vrf_id = SCTP_DEFAULT_VRFID;
+#endif
+
+	inp = (struct sctp_inpcb *)so->so_pcb;
+	if (inp != NULL) {
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+		return (EINVAL);
+	}
+
+	if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
+		error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace));
+		if (error)
+			return (error);
+	}
+	error = sctp_inpcb_alloc(so, vrf_id);
+	if (error)
+		return (error);
+	inp = (struct sctp_inpcb *)so->so_pcb;
+	SCTP_INP_WLOCK(inp);
+	inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6;	/* I'm v6! */
+
+	inp->ip_inp.inp.inp_vflag |= INP_IPV6;
+	inp->ip_inp.inp.in6p_hops = -1;	/* use kernel default */
+	inp->ip_inp.inp.in6p_cksum = -1;	/* just to be sure */
+#ifdef INET
+	/*
+	 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6
+	 * socket as well, because the socket may be bound to an IPv6
+	 * wildcard address, which may match an IPv4-mapped IPv6 address.
+	 */
+	inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
+#endif
+	SCTP_INP_WUNLOCK(inp);
+	return (0);
+}
+
+#if defined(__Userspace__)
+int
+sctp6_bind(struct socket *so, struct sockaddr *addr, void * p)
+{
+#elif defined(__FreeBSD__)
+static int
+sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
+{
+#elif defined(__APPLE__)
+static int
+sctp6_bind(struct socket *so, struct sockaddr *addr, struct proc *p)
+{
+#elif defined(_WIN32)
+static int
+sctp6_bind(struct socket *so, struct sockaddr *addr, PKTHREAD p)
+{
+#else
+static int
+sctp6_bind(struct socket *so, struct mbuf *nam, struct proc *p)
+{
+	struct sockaddr *addr = nam ? mtod(nam, struct sockaddr *): NULL;
+
+#endif
+	struct sctp_inpcb *inp;
+	int error;
+	u_char vflagsav;
+
+	inp = (struct sctp_inpcb *)so->so_pcb;
+	if (inp == NULL) {
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+		return (EINVAL);
+	}
+
+#if !(defined(_WIN32) && !defined(__Userspace__))
+	if (addr) {
+		switch (addr->sa_family) {
+#ifdef INET
+		case AF_INET:
+#ifdef HAVE_SA_LEN
+			if (addr->sa_len != sizeof(struct sockaddr_in)) {
+				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+				return (EINVAL);
+			}
+#endif
+			break;
+#endif
+#ifdef INET6
+		case AF_INET6:
+#ifdef HAVE_SA_LEN
+			if (addr->sa_len != sizeof(struct sockaddr_in6)) {
+				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+				return (EINVAL);
+			}
+#endif
+			break;
+#endif
+		default:
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+			return (EINVAL);
+		}
+	}
+#endif
+	vflagsav = inp->ip_inp.inp.inp_vflag;
+	inp->ip_inp.inp.inp_vflag &= ~INP_IPV4;
+	inp->ip_inp.inp.inp_vflag |= INP_IPV6;
+	if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp) == 0)) {
+		switch (addr->sa_family) {
+#ifdef INET
+		case AF_INET:
+			/* binding v4 addr to v6 socket, so reset flags */
+			inp->ip_inp.inp.inp_vflag |= INP_IPV4;
+			inp->ip_inp.inp.inp_vflag &= ~INP_IPV6;
+			break;
+#endif
+#ifdef INET6
+		case AF_INET6:
+		{
+			struct sockaddr_in6 *sin6_p;
+
+			sin6_p = (struct sockaddr_in6 *)addr;
+
+			if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
+				inp->ip_inp.inp.inp_vflag |= INP_IPV4;
+			}
+#ifdef INET
+			if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
+				struct sockaddr_in sin;
+
+				in6_sin6_2_sin(&sin, sin6_p);
+				inp->ip_inp.inp.inp_vflag |= INP_IPV4;
+				inp->ip_inp.inp.inp_vflag &= ~INP_IPV6;
+				error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p);
+				goto out;
+			}
+#endif
+			break;
+		}
+#endif
+		default:
+			break;
+		}
+	} else if (addr != NULL) {
+		struct sockaddr_in6 *sin6_p;
+
+		/* IPV6_V6ONLY socket */
+#ifdef INET
+		if (addr->sa_family == AF_INET) {
+			/* can't bind v4 addr to v6 only socket! */
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+			error = EINVAL;
+			goto out;
+		}
+#endif
+		sin6_p = (struct sockaddr_in6 *)addr;
+
+		if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
+			/* can't bind v4-mapped addrs either! */
+			/* NOTE: we don't support SIIT */
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+			error = EINVAL;
+			goto out;
+		}
+	}
+	error = sctp_inpcb_bind(so, addr, NULL, p);
+out:
+	if (error != 0)
+		inp->ip_inp.inp.inp_vflag = vflagsav;
+	return (error);
+}
+
+#if defined(__FreeBSD__) || defined(_WIN32) || defined(__Userspace__)
+#if !defined(__Userspace__)
+static void
+#else
+void
+#endif
+sctp6_close(struct socket *so)
+{
+	sctp_close(so);
+}
+
+/* This could be made common with sctp_detach() since they are identical */
+#else
+
+static
+int
+sctp6_detach(struct socket *so)
+{
+#if defined(__Userspace__)
+	sctp_close(so);
+	return (0);
+#else
+	return (sctp_detach(so));
+#endif
+}
+
+#endif
+
+int
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
+    struct mbuf *control, struct thread *p);
+#else
+sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
+    struct mbuf *control, struct proc *p);
+#endif
+
+#if !defined(_WIN32) && !defined(__Userspace__)
+#if defined(__FreeBSD__)
+static int
+sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
+    struct mbuf *control, struct thread *p)
+{
+#elif defined(__APPLE__)
+static int
+sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
+    struct mbuf *control, struct proc *p)
+{
+#else
+static int
+sctp6_send(struct socket *so, int flags, struct mbuf *m, struct mbuf *nam,
+    struct mbuf *control, struct proc *p)
+{
+	struct sockaddr *addr = nam ? mtod(nam, struct sockaddr *): NULL;
+#endif
+	struct sctp_inpcb *inp;
+
+#ifdef INET
+	struct sockaddr_in6 *sin6;
+#endif /* INET */
+	/* No SPL needed since sctp_output does this */
+
+	inp = (struct sctp_inpcb *)so->so_pcb;
+	if (inp == NULL) {
+		if (control) {
+			SCTP_RELEASE_PKT(control);
+			control = NULL;
+		}
+		SCTP_RELEASE_PKT(m);
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+		return (EINVAL);
+	}
+	/*
+	 * For the TCP model we may get a NULL addr, if we are a connected
+	 * socket thats ok.
+	 */
+	if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
+	    (addr == NULL)) {
+		goto connected_type;
+	}
+	if (addr == NULL) {
+		SCTP_RELEASE_PKT(m);
+		if (control) {
+			SCTP_RELEASE_PKT(control);
+			control = NULL;
+		}
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
+		return (EDESTADDRREQ);
+	}
+	switch (addr->sa_family) {
+#ifdef INET
+	case AF_INET:
+#if defined(HAVE_SA_LEN)
+		if (addr->sa_len != sizeof(struct sockaddr_in)) {
+			if (control) {
+				SCTP_RELEASE_PKT(control);
+				control = NULL;
+			}
+			SCTP_RELEASE_PKT(m);
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+			return (EINVAL);
+		}
+#endif
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+#if defined(HAVE_SA_LEN)
+		if (addr->sa_len != sizeof(struct sockaddr_in6)) {
+			if (control) {
+				SCTP_RELEASE_PKT(control);
+				control = NULL;
+			}
+			SCTP_RELEASE_PKT(m);
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+			return (EINVAL);
+		}
+#endif
+		break;
+#endif
+	default:
+		if (control) {
+			SCTP_RELEASE_PKT(control);
+			control = NULL;
+		}
+		SCTP_RELEASE_PKT(m);
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+		return (EINVAL);
+	}
+#ifdef INET
+	sin6 = (struct sockaddr_in6 *)addr;
+	if (SCTP_IPV6_V6ONLY(inp)) {
+		/*
+		 * if IPV6_V6ONLY flag, we discard datagrams destined to a
+		 * v4 addr or v4-mapped addr
+		 */
+		if (addr->sa_family == AF_INET) {
+			if (control) {
+				SCTP_RELEASE_PKT(control);
+				control = NULL;
+			}
+			SCTP_RELEASE_PKT(m);
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+			return (EINVAL);
+		}
+		if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
+			if (control) {
+				SCTP_RELEASE_PKT(control);
+				control = NULL;
+			}
+			SCTP_RELEASE_PKT(m);
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+			return (EINVAL);
+		}
+	}
+	if ((addr->sa_family == AF_INET6) &&
+	    IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
+		struct sockaddr_in sin;
+
+		/* convert v4-mapped into v4 addr and send */
+		in6_sin6_2_sin(&sin, sin6);
+		return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p));
+	}
+#endif				/* INET */
+connected_type:
+	/* now what about control */
+	if (control) {
+		if (inp->control) {
+			SCTP_PRINTF("huh? control set?\n");
+			SCTP_RELEASE_PKT(inp->control);
+			inp->control = NULL;
+		}
+		inp->control = control;
+	}
+	/* Place the data */
+	if (inp->pkt) {
+		SCTP_BUF_NEXT(inp->pkt_last) = m;
+		inp->pkt_last = m;
+	} else {
+		inp->pkt_last = inp->pkt = m;
+	}
+	if (
+#if (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__)
+	/* FreeBSD and MacOSX uses a flag passed */
+	    ((flags & PRUS_MORETOCOME) == 0)
+#else
+	    1			/* Open BSD does not have any "more to come"
+				 * indication */
+#endif
+	    ) {
+		/*
+		 * note with the current version this code will only be used
+		 * by OpenBSD, NetBSD and FreeBSD have methods for
+		 * re-defining sosend() to use sctp_sosend().  One can
+		 * optionaly switch back to this code (by changing back the
+		 * defininitions but this is not advisable.
+		 */
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+		struct epoch_tracker et;
+#endif
+		int ret;
+
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	NET_EPOCH_ENTER(et);
+#endif
+		ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	NET_EPOCH_EXIT(et);
+#endif
+		inp->pkt = NULL;
+		inp->control = NULL;
+		return (ret);
+	} else {
+		return (0);
+	}
+}
+#endif
+
+#if defined(__Userspace__)
+int
+sctp6_connect(struct socket *so, struct sockaddr *addr)
+{
+	void *p = NULL;
+#elif defined(__FreeBSD__)
+static int
+sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
+{
+#elif defined(__APPLE__)
+static int
+sctp6_connect(struct socket *so, struct sockaddr *addr, struct proc *p)
+{
+#elif defined(_WIN32)
+static int
+sctp6_connect(struct socket *so, struct sockaddr *addr, PKTHREAD p)
+{
+#else
+static int
+sctp6_connect(struct socket *so, struct mbuf *nam, struct proc *p)
+{
+	struct sockaddr *addr = mtod(nam, struct sockaddr *);
+#endif
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	struct epoch_tracker et;
+#endif
+	uint32_t vrf_id;
+	int error = 0;
+	struct sctp_inpcb *inp;
+	struct sctp_tcb *stcb;
+#ifdef INET
+	struct sockaddr_in6 *sin6;
+	union sctp_sockstore store;
+#endif
+
+	inp = (struct sctp_inpcb *)so->so_pcb;
+	if (inp == NULL) {
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
+		return (ECONNRESET);	/* I made the same as TCP since we are
+					 * not setup? */
+	}
+	if (addr == NULL) {
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+		return (EINVAL);
+	}
+#if !(defined(_WIN32) && !defined(__Userspace__))
+	switch (addr->sa_family) {
+#ifdef INET
+	case AF_INET:
+#ifdef HAVE_SA_LEN
+		if (addr->sa_len != sizeof(struct sockaddr_in)) {
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+			return (EINVAL);
+		}
+#endif
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+#ifdef HAVE_SA_LEN
+		if (addr->sa_len != sizeof(struct sockaddr_in6)) {
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+			return (EINVAL);
+		}
+#endif
+		break;
+#endif
+	default:
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+		return (EINVAL);
+	}
+#endif
+
+	vrf_id = inp->def_vrf_id;
+	SCTP_ASOC_CREATE_LOCK(inp);
+	SCTP_INP_RLOCK(inp);
+	if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
+	    SCTP_PCB_FLAGS_UNBOUND) {
+		/* Bind a ephemeral port */
+		SCTP_INP_RUNLOCK(inp);
+		error = sctp6_bind(so, NULL, p);
+		if (error) {
+			SCTP_ASOC_CREATE_UNLOCK(inp);
+
+			return (error);
+		}
+		SCTP_INP_RLOCK(inp);
+	}
+	if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
+	    (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
+		/* We are already connected AND the TCP model */
+		SCTP_INP_RUNLOCK(inp);
+		SCTP_ASOC_CREATE_UNLOCK(inp);
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE);
+		return (EADDRINUSE);
+	}
+#ifdef INET
+	sin6 = (struct sockaddr_in6 *)addr;
+	if (SCTP_IPV6_V6ONLY(inp)) {
+		/*
+		 * if IPV6_V6ONLY flag, ignore connections destined to a v4
+		 * addr or v4-mapped addr
+		 */
+		if (addr->sa_family == AF_INET) {
+			SCTP_INP_RUNLOCK(inp);
+			SCTP_ASOC_CREATE_UNLOCK(inp);
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+			return (EINVAL);
+		}
+		if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
+			SCTP_INP_RUNLOCK(inp);
+			SCTP_ASOC_CREATE_UNLOCK(inp);
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+			return (EINVAL);
+		}
+	}
+	if ((addr->sa_family == AF_INET6) &&
+	    IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
+		/* convert v4-mapped into v4 addr */
+		in6_sin6_2_sin(&store.sin, sin6);
+		addr = &store.sa;
+	}
+#endif				/* INET */
+	/* Now do we connect? */
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
+		stcb = LIST_FIRST(&inp->sctp_asoc_list);
+		if (stcb) {
+			SCTP_TCB_LOCK(stcb);
+		}
+		SCTP_INP_RUNLOCK(inp);
+	} else {
+		SCTP_INP_RUNLOCK(inp);
+		SCTP_INP_WLOCK(inp);
+		SCTP_INP_INCR_REF(inp);
+		SCTP_INP_WUNLOCK(inp);
+		stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
+		if (stcb == NULL) {
+			SCTP_INP_WLOCK(inp);
+			SCTP_INP_DECR_REF(inp);
+			SCTP_INP_WUNLOCK(inp);
+		}
+	}
+
+	if (stcb != NULL) {
+		/* Already have or am bring up an association */
+		SCTP_ASOC_CREATE_UNLOCK(inp);
+		SCTP_TCB_UNLOCK(stcb);
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
+		return (EALREADY);
+	}
+	/* We are GOOD to go */
+	stcb = sctp_aloc_assoc_connected(inp, addr, &error, 0, 0, vrf_id,
+	                                 inp->sctp_ep.pre_open_stream_count,
+	                                 inp->sctp_ep.port, p,
+	                                 SCTP_INITIALIZE_AUTH_PARAMS);
+	SCTP_ASOC_CREATE_UNLOCK(inp);
+	if (stcb == NULL) {
+		/* Gak! no memory */
+		return (error);
+	}
+	SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
+	(void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	NET_EPOCH_ENTER(et);
+#endif
+	sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
+	SCTP_TCB_UNLOCK(stcb);
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	NET_EPOCH_EXIT(et);
+#endif
+	return (error);
+}
+
+static int
+#if !defined(__Userspace__)
+sctp6_getaddr(struct socket *so, struct sockaddr **addr)
+{
+	struct sockaddr_in6 *sin6;
+#else
+sctp6_getaddr(struct socket *so, struct mbuf *nam)
+{
+	struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *);
+#endif
+	struct sctp_inpcb *inp;
+	uint32_t vrf_id;
+	struct sctp_ifa *sctp_ifa;
+
+#if defined(SCTP_KAME) && defined(SCTP_EMBEDDED_V6_SCOPE)
+	int error;
+#endif
+
+	/*
+	 * Do the malloc first in case it blocks.
+	 */
+#if !defined(__Userspace__)
+	SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6));
+	if (sin6 == NULL)
+		return (ENOMEM);
+#else
+	SCTP_BUF_LEN(nam) = sizeof(*sin6);
+	memset(sin6, 0, sizeof(*sin6));
+#endif
+	sin6->sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+	sin6->sin6_len = sizeof(*sin6);
+#endif
+
+	inp = (struct sctp_inpcb *)so->so_pcb;
+	if (inp == NULL) {
+#if !defined(__Userspace__)
+		SCTP_FREE_SONAME(sin6);
+#endif
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
+		return (ECONNRESET);
+	}
+	SCTP_INP_RLOCK(inp);
+	sin6->sin6_port = inp->sctp_lport;
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
+		/* For the bound all case you get back 0 */
+		if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
+			struct sctp_tcb *stcb;
+			struct sockaddr_in6 *sin_a6;
+			struct sctp_nets *net;
+			int fnd;
+			stcb = LIST_FIRST(&inp->sctp_asoc_list);
+			if (stcb == NULL) {
+				SCTP_INP_RUNLOCK(inp);
+#if !defined(__Userspace__)
+				SCTP_FREE_SONAME(sin6);
+#endif
+				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
+				return (ENOENT);
+			}
+			fnd = 0;
+			sin_a6 = NULL;
+			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
+				sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
+				if (sin_a6 == NULL)
+					/* this will make coverity happy */
+					continue;
+
+				if (sin_a6->sin6_family == AF_INET6) {
+					fnd = 1;
+					break;
+				}
+			}
+			if ((!fnd) || (sin_a6 == NULL)) {
+				/* punt */
+				SCTP_INP_RUNLOCK(inp);
+#if !defined(__Userspace__)
+				SCTP_FREE_SONAME(sin6);
+#endif
+				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
+				return (ENOENT);
+			}
+			vrf_id = inp->def_vrf_id;
+			sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id);
+			if (sctp_ifa) {
+				sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr;
+			}
+		} else {
+			/* For the bound all case you get back 0 */
+			memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
+		}
+	} else {
+		/* Take the first IPv6 address in the list */
+		struct sctp_laddr *laddr;
+		int fnd = 0;
+
+		LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
+			if (laddr->ifa->address.sa.sa_family == AF_INET6) {
+				struct sockaddr_in6 *sin_a;
+
+				sin_a = &laddr->ifa->address.sin6;
+				sin6->sin6_addr = sin_a->sin6_addr;
+				fnd = 1;
+				break;
+			}
+		}
+		if (!fnd) {
+#if !defined(__Userspace__)
+			SCTP_FREE_SONAME(sin6);
+#endif
+			SCTP_INP_RUNLOCK(inp);
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
+			return (ENOENT);
+		}
+	}
+	SCTP_INP_RUNLOCK(inp);
+	/* Scoping things for v6 */
+#ifdef SCTP_EMBEDDED_V6_SCOPE
+#ifdef SCTP_KAME
+	if ((error = sa6_recoverscope(sin6)) != 0) {
+		SCTP_FREE_SONAME(sin6);
+		return (error);
+	}
+#else
+	if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr))
+		/* skip ifp check below */
+		in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
+	else
+		sin6->sin6_scope_id = 0;	/* XXX */
+#endif /* SCTP_KAME */
+#endif /* SCTP_EMBEDDED_V6_SCOPE */
+#if !defined(__Userspace__)
+	(*addr) = (struct sockaddr *)sin6;
+#endif
+	return (0);
+}
+
+static int
+#if !defined(__Userspace__)
+sctp6_peeraddr(struct socket *so, struct sockaddr **addr)
+{
+	struct sockaddr_in6 *sin6;
+#else
+sctp6_peeraddr(struct socket *so, struct mbuf *nam)
+{
+	struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *);
+#endif
+	int fnd;
+	struct sockaddr_in6 *sin_a6;
+	struct sctp_inpcb *inp;
+	struct sctp_tcb *stcb;
+	struct sctp_nets *net;
+#ifdef SCTP_KAME
+	int error;
+#endif
+
+	/* Do the malloc first in case it blocks. */
+#if !defined(__Userspace__)
+	SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
+	if (sin6 == NULL)
+		return (ENOMEM);
+#else
+	SCTP_BUF_LEN(nam) = sizeof(*sin6);
+	memset(sin6, 0, sizeof(*sin6));
+#endif
+	sin6->sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+	sin6->sin6_len = sizeof(*sin6);
+#endif
+
+	inp = (struct sctp_inpcb *)so->so_pcb;
+	if ((inp == NULL) ||
+	    ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
+		/* UDP type and listeners will drop out here */
+#if !defined(__Userspace__)
+		SCTP_FREE_SONAME(sin6);
+#endif
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN);
+		return (ENOTCONN);
+	}
+	SCTP_INP_RLOCK(inp);
+	stcb = LIST_FIRST(&inp->sctp_asoc_list);
+	if (stcb) {
+		SCTP_TCB_LOCK(stcb);
+	}
+	SCTP_INP_RUNLOCK(inp);
+	if (stcb == NULL) {
+#if !defined(__Userspace__)
+		SCTP_FREE_SONAME(sin6);
+#endif
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
+		return (ECONNRESET);
+	}
+	fnd = 0;
+	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
+		sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
+		if (sin_a6->sin6_family == AF_INET6) {
+			fnd = 1;
+			sin6->sin6_port = stcb->rport;
+			sin6->sin6_addr = sin_a6->sin6_addr;
+			break;
+		}
+	}
+	SCTP_TCB_UNLOCK(stcb);
+	if (!fnd) {
+		/* No IPv4 address */
+#if !defined(__Userspace__)
+		SCTP_FREE_SONAME(sin6);
+#endif
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
+		return (ENOENT);
+	}
+#ifdef SCTP_EMBEDDED_V6_SCOPE
+#ifdef SCTP_KAME
+	if ((error = sa6_recoverscope(sin6)) != 0) {
+#if !defined(__Userspace__)
+		SCTP_FREE_SONAME(sin6);
+#endif
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error);
+		return (error);
+	}
+#else
+	in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
+#endif /* SCTP_KAME */
+#endif /* SCTP_EMBEDDED_V6_SCOPE */
+#if !defined(__Userspace__)
+	*addr = (struct sockaddr *)sin6;
+#endif
+	return (0);
+}
+
+#if !defined(__Userspace__)
+static int
+sctp6_in6getaddr(struct socket *so, struct sockaddr **nam)
+{
+#elif defined(__Userspace__)
+int
+sctp6_in6getaddr(struct socket *so, struct mbuf *nam)
+{
+#ifdef INET
+	struct sockaddr *addr = mtod(nam, struct sockaddr *);
+#endif
+#else
+static int
+sctp6_in6getaddr(struct socket *so, struct mbuf *nam)
+{
+#ifdef INET
+	struct sockaddr *addr = mtod(nam, struct sockaddr *);
+#endif
+#endif
+	struct inpcb *inp = sotoinpcb(so);
+	int error;
+
+	if (inp == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+		return (EINVAL);
+	}
+
+	/* allow v6 addresses precedence */
+	error = sctp6_getaddr(so, nam);
+#ifdef INET
+	if (error) {
+#if !defined(__Userspace__)
+		struct sockaddr_in6 *sin6;
+#else
+		struct sockaddr_in6 sin6;
+#endif
+
+		/* try v4 next if v6 failed */
+		error = sctp_ingetaddr(so, nam);
+		if (error) {
+			return (error);
+		}
+#if !defined(__Userspace__)
+		SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
+		if (sin6 == NULL) {
+			SCTP_FREE_SONAME(*nam);
+			return (ENOMEM);
+		}
+		in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
+		SCTP_FREE_SONAME(*nam);
+		*nam = (struct sockaddr *)sin6;
+#else
+		in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6);
+		SCTP_BUF_LEN(nam) = sizeof(struct sockaddr_in6);
+		memcpy(addr, &sin6, sizeof(struct sockaddr_in6));
+#endif
+	}
+#endif
+	return (error);
+}
+
+#if !defined(__Userspace__)
+static int
+sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
+{
+#elif defined(__Userspace__)
+int
+sctp6_getpeeraddr(struct socket *so, struct mbuf *nam)
+{
+#ifdef INET
+	struct sockaddr *addr = mtod(nam, struct sockaddr *);
+#endif
+#else
+static
+int
+sctp6_getpeeraddr(struct socket *so, struct mbuf *nam)
+{
+#ifdef INET
+	struct sockaddr *addr = mtod(nam, struct sockaddr *);
+#endif
+
+#endif
+	struct inpcb *inp = sotoinpcb(so);
+	int error;
+
+	if (inp == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
+		return (EINVAL);
+	}
+
+	/* allow v6 addresses precedence */
+	error = sctp6_peeraddr(so, nam);
+#ifdef INET
+	if (error) {
+#if !defined(__Userspace__)
+		struct sockaddr_in6 *sin6;
+#else
+		struct sockaddr_in6 sin6;
+#endif
+
+		/* try v4 next if v6 failed */
+		error = sctp_peeraddr(so, nam);
+		if (error) {
+			return (error);
+		}
+#if !defined(__Userspace__)
+		SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
+		if (sin6 == NULL) {
+			SCTP_FREE_SONAME(*nam);
+			return (ENOMEM);
+		}
+		in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
+		SCTP_FREE_SONAME(*nam);
+		*nam = (struct sockaddr *)sin6;
+#else
+		in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6);
+		SCTP_BUF_LEN(nam) = sizeof(struct sockaddr_in6);
+		memcpy(addr, &sin6, sizeof(struct sockaddr_in6));
+#endif
+	}
+#endif
+	return (error);
+}
+
+#if !defined(__Userspace__)
+#if defined(__FreeBSD__)
+#define	SCTP6_PROTOSW							\
+	.pr_protocol =	IPPROTO_SCTP,					\
+	.pr_ctloutput =	sctp_ctloutput,					\
+	.pr_abort =	sctp_abort,					\
+	.pr_accept =	sctp_accept,					\
+	.pr_attach =	sctp6_attach,					\
+	.pr_bind =	sctp6_bind,					\
+	.pr_connect =	sctp6_connect,					\
+	.pr_control =	in6_control,					\
+	.pr_close =	sctp6_close,					\
+	.pr_detach =	sctp6_close,					\
+	.pr_sopoll =	sopoll_generic,					\
+	.pr_flush =	sctp_flush,					\
+	.pr_disconnect = sctp_disconnect,				\
+	.pr_listen =	sctp_listen,					\
+	.pr_peeraddr =	sctp6_getpeeraddr,				\
+	.pr_send =	sctp6_send,					\
+	.pr_shutdown =	sctp_shutdown,					\
+	.pr_sockaddr =	sctp6_in6getaddr,				\
+	.pr_sosend =	sctp_sosend,					\
+	.pr_soreceive =	sctp_soreceive
+
+struct protosw sctp6_seqpacket_protosw = {
+	.pr_type = SOCK_SEQPACKET,
+	.pr_flags = PR_WANTRCVD,
+	SCTP6_PROTOSW
+};
+
+struct protosw sctp6_stream_protosw = {
+	.pr_type = SOCK_STREAM,
+	.pr_flags = PR_CONNREQUIRED | PR_WANTRCVD,
+	SCTP6_PROTOSW
+};
+#else
+struct pr_usrreqs sctp6_usrreqs = {
+#if defined(__APPLE__) && !defined(__Userspace__)
+	.pru_abort = sctp_abort,
+	.pru_accept = sctp_accept,
+	.pru_attach = sctp6_attach,
+	.pru_bind = sctp6_bind,
+	.pru_connect = sctp6_connect,
+	.pru_connect2 = pru_connect2_notsupp,
+	.pru_control = in6_control,
+	.pru_detach = sctp6_detach,
+	.pru_disconnect = sctp_disconnect,
+	.pru_listen = sctp_listen,
+	.pru_peeraddr = sctp6_getpeeraddr,
+	.pru_rcvd = NULL,
+	.pru_rcvoob = pru_rcvoob_notsupp,
+	.pru_send = sctp6_send,
+	.pru_sense = pru_sense_null,
+	.pru_shutdown = sctp_shutdown,
+	.pru_sockaddr = sctp6_in6getaddr,
+	.pru_sosend = sctp_sosend,
+	.pru_soreceive = sctp_soreceive,
+	.pru_sopoll = sopoll
+#elif defined(_WIN32) && !defined(__Userspace__)
+	sctp_abort,
+	sctp_accept,
+	sctp6_attach,
+	sctp6_bind,
+	sctp6_connect,
+	pru_connect2_notsupp,
+	NULL,
+	NULL,
+	sctp_disconnect,
+	sctp_listen,
+	sctp6_getpeeraddr,
+	NULL,
+	pru_rcvoob_notsupp,
+	NULL,
+	pru_sense_null,
+	sctp_shutdown,
+	sctp_flush,
+	sctp6_in6getaddr,
+	sctp_sosend,
+	sctp_soreceive,
+	sopoll_generic,
+	NULL,
+	sctp6_close
+};
+#endif
+#endif
+#endif
+#endif
diff --git a/netwerk/sctp/src/netinet6/sctp6_var.h b/netwerk/sctp/src/netinet6/sctp6_var.h
new file mode 100644
index 0000000000..8bfef64ca3
--- /dev/null
+++ b/netwerk/sctp/src/netinet6/sctp6_var.h
@@ -0,0 +1,82 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
+ * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
+ * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * a) Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * b) 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.
+ *
+ * c) Neither the name of Cisco Systems, Inc. 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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 _NETINET6_SCTP6_VAR_H_
+#define _NETINET6_SCTP6_VAR_H_
+
+#if defined(__Userspace__)
+#ifdef INET
+extern void in6_sin6_2_sin(struct sockaddr_in *, struct sockaddr_in6 *);
+extern void in6_sin6_2_sin_in_sock(struct sockaddr *);
+extern void in6_sin_2_v4mapsin6(const struct sockaddr_in *, struct sockaddr_in6 *);
+#endif
+#endif
+#if defined(_KERNEL)
+
+#if !defined(__Userspace__)
+SYSCTL_DECL(_net_inet6_sctp6);
+#if defined(__FreeBSD__)
+extern struct protosw sctp6_seqpacket_protosw, sctp6_stream_protosw;
+#else
+extern struct pr_usrreqs sctp6_usrreqs;
+#endif
+#else
+int sctp6_usrreq(struct socket *, int, struct mbuf *, struct mbuf *, struct mbuf *);
+#endif
+
+#if defined(__APPLE__) && !defined(__Userspace__)
+int sctp6_input(struct mbuf **, int *);
+int sctp6_input_with_port(struct mbuf **, int *, uint16_t);
+#else
+int sctp6_input(struct mbuf **, int *, int);
+int sctp6_input_with_port(struct mbuf **, int *, uint16_t);
+#endif
+int sctp6_output(struct sctp_inpcb *, struct mbuf *, struct sockaddr *,
+                 struct mbuf *, struct proc *);
+#if defined(__APPLE__) && !defined(__Userspace__) && !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION) && !defined(APPLE_ELCAPITAN)
+void sctp6_ctlinput(int, struct sockaddr *, void *, struct ifnet * SCTP_UNUSED);
+#elif defined(__FreeBSD__) && !defined(__Userspace__)
+ip6proto_ctlinput_t sctp6_ctlinput;
+#else
+void sctp6_ctlinput(int, struct sockaddr_in6 *, ip6ctlparam *);
+#endif
+#if !((defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__))
+extern void in6_sin_2_v4mapsin6(struct sockaddr_in *, struct sockaddr_in6 *);
+extern void in6_sin6_2_sin(struct sockaddr_in *, struct sockaddr_in6 *);
+extern void in6_sin6_2_sin_in_sock(struct sockaddr *);
+#endif
+void sctp6_notify(struct sctp_inpcb *, struct sctp_tcb *, struct sctp_nets *,
+                  uint8_t, uint8_t, uint32_t);
+#endif
+#endif