diff --git a/sys/netinet/sctp_output.c b/sys/netinet/sctp_output.c
index 5c2a492a71de..f306f7e96d04 100644
--- a/sys/netinet/sctp_output.c
+++ b/sys/netinet/sctp_output.c
@@ -4096,6 +4096,7 @@ sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
 	struct sctp_nets *net;
 	struct sctp_init_msg *initm;
 	struct sctp_supported_addr_param *sup_addr;
+	struct sctp_adaptation_layer_indication *ali;
 	struct sctp_ecn_supported_param *ecn;
 	struct sctp_prsctp_supported_param *prsctp;
 	struct sctp_ecn_nonce_supported_param *ecn_nonce;
@@ -4193,21 +4194,13 @@ sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
 #endif
 	SCTP_BUF_LEN(m) += sizeof(*sup_addr) + sizeof(uint16_t);
 
-	if (inp->sctp_ep.adaptation_layer_indicator) {
-		struct sctp_adaptation_layer_indication *ali;
-
-		ali = (struct sctp_adaptation_layer_indication *)(
-		    (caddr_t)sup_addr + sizeof(*sup_addr) + sizeof(uint16_t));
-		ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
-		ali->ph.param_length = htons(sizeof(*ali));
-		ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
-		SCTP_BUF_LEN(m) += sizeof(*ali);
-		ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali +
-		    sizeof(*ali));
-	} else {
-		ecn = (struct sctp_ecn_supported_param *)((caddr_t)sup_addr +
-		    sizeof(*sup_addr) + sizeof(uint16_t));
-	}
+	/* adaptation layer indication parameter */
+	ali = (struct sctp_adaptation_layer_indication *)((caddr_t)sup_addr + sizeof(*sup_addr) + sizeof(uint16_t));
+	ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
+	ali->ph.param_length = htons(sizeof(*ali));
+	ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
+	SCTP_BUF_LEN(m) += sizeof(*ali);
+	ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
 
 	/* now any cookie time extensions */
 	if (stcb->asoc.cookie_preserve_req) {
@@ -4889,6 +4882,7 @@ sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
 	struct sctp_association *asoc;
 	struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *mp_last;
 	struct sctp_init_msg *initackm_out;
+	struct sctp_adaptation_layer_indication *ali;
 	struct sctp_ecn_supported_param *ecn;
 	struct sctp_prsctp_supported_param *prsctp;
 	struct sctp_ecn_nonce_supported_param *ecn_nonce;
@@ -5319,23 +5313,14 @@ sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
 	/* tell him his limt. */
 	initackm_out->msg.init.num_inbound_streams =
 	    htons(inp->sctp_ep.max_open_streams_intome);
-	/* setup the ECN pointer */
 
-	if (inp->sctp_ep.adaptation_layer_indicator) {
-		struct sctp_adaptation_layer_indication *ali;
-
-		ali = (struct sctp_adaptation_layer_indication *)(
-		    (caddr_t)initackm_out + sizeof(*initackm_out));
-		ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
-		ali->ph.param_length = htons(sizeof(*ali));
-		ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
-		SCTP_BUF_LEN(m) += sizeof(*ali);
-		ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali +
-		    sizeof(*ali));
-	} else {
-		ecn = (struct sctp_ecn_supported_param *)(
-		    (caddr_t)initackm_out + sizeof(*initackm_out));
-	}
+	/* adaptation layer indication parameter */
+	ali = (struct sctp_adaptation_layer_indication *)((caddr_t)initackm_out + sizeof(*initackm_out));
+	ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
+	ali->ph.param_length = htons(sizeof(*ali));
+	ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
+	SCTP_BUF_LEN(m) += sizeof(*ali);
+	ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
 
 	/* ECN parameter */
 	if (SCTP_BASE_SYSCTL(sctp_ecn_enable) == 1) {
@@ -6816,6 +6801,9 @@ sctp_move_to_outqueue(struct sctp_tcb *stcb, struct sctp_nets *net,
 	if (sp->sinfo_flags & SCTP_UNORDERED) {
 		rcv_flags |= SCTP_DATA_UNORDERED;
 	}
+	if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) {
+		rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
+	}
 	/* clear out the chunk before setting up */
 	memset(chk, 0, sizeof(*chk));
 	chk->rec.data.rcv_flags = rcv_flags;
@@ -8062,6 +8050,13 @@ sctp_med_chunk_output(struct sctp_inpcb *inp,
 					    chk->send_size, mtu);
 					chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
 				}
+				if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
+				    ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
+					struct sctp_data_chunk *dchkh;
+
+					dchkh = mtod(chk->data, struct sctp_data_chunk *);
+					dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
+				}
 				if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
 				    ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
 					/* ok we will add this one */
@@ -11737,7 +11732,7 @@ sctp_sosend(struct socket *so,
 		}
 	}
 	addr_to_use = addr;
-#ifdef INET6
+#if defined(INET6)  && !defined(__Userspace__)	/* TODO port in6_sin6_2_sin */
 	if ((addr) && (addr->sa_family == AF_INET6)) {
 		struct sockaddr_in6 *sin6;