MFC r285792:

Fix several problems with Stream Reset.
 1) We were not handling (or sending) the IN_PROGRESS case if
    the other side (or our side) was not able to reset (awaiting more data).
 2) We would improperly send a stream-reset when we should not. Not
    waiting until the TSN had been assigned when data was inqueue.

7 files changed, 373 insertions, 63 deletions

diff --git a/sys/netinet/sctp_indata.c b/sys/netinet/sctp_indata.c
index 50a6628..9bfdddc 100644
--- a/sys/netinet/sctp_indata.c
+++ b/sys/netinet/sctp_indata.c
@@ -1886,6 +1886,7 @@ finish_express_del:
 
 		sctp_reset_in_stream(stcb, liste->number_entries, liste->list_of_streams);
 		TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
+		sctp_send_deferred_reset_response(stcb, liste, SCTP_STREAM_RESET_RESULT_PERFORMED);
 		SCTP_FREE(liste, SCTP_M_STRESET);
 		/* sa_ignore FREED_MEMORY */
 		liste = TAILQ_FIRST(&asoc->resetHead);
diff --git a/sys/netinet/sctp_input.c b/sys/netinet/sctp_input.c
index 099742f..eb0dd87 100644
--- a/sys/netinet/sctp_input.c
+++ b/sys/netinet/sctp_input.c
@@ -357,14 +357,17 @@ sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
 					sctp_free_a_strmoq(stcb, sp, SCTP_SO_NOT_LOCKED);
 					/* sa_ignore FREED_MEMORY */
 				}
+				outs->state = SCTP_STREAM_CLOSED;
 			}
 		}
 		/* cut back the count */
 		asoc->pre_open_streams = newcnt;
 	}
 	SCTP_TCB_SEND_UNLOCK(stcb);
-	asoc->strm_realoutsize = asoc->streamoutcnt = asoc->pre_open_streams;
-
+	asoc->streamoutcnt = asoc->pre_open_streams;
+	for (i = 0; i < asoc->streamoutcnt; i++) {
+		asoc->strmout[i].state = SCTP_STREAM_OPEN;
+	}
 	/* EY - nr_sack: initialize highest tsn in nr_mapping_array */
 	asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
 	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
@@ -3506,6 +3509,28 @@ sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t
 	sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
 }
 
+static void
+sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t * list)
+{
+	uint32_t i;
+	uint16_t temp;
+
+	if (number_entries > 0) {
+		for (i = 0; i < number_entries; i++) {
+			temp = ntohs(list[i]);
+			if (temp >= stcb->asoc.streamoutcnt) {
+				/* no such stream */
+				continue;
+			}
+			stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
+		}
+	} else {
+		for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
+			stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
+		}
+	}
+}
+
 
 struct sctp_stream_reset_request *
 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
@@ -3604,6 +3629,8 @@ sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
 			type = ntohs(req_param->ph.param_type);
 			lparm_len = ntohs(req_param->ph.param_length);
 			if (type == SCTP_STR_RESET_OUT_REQUEST) {
+				int no_clear = 0;
+
 				req_out_param = (struct sctp_stream_reset_out_request *)req_param;
 				number_entries = (lparm_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
 				asoc->stream_reset_out_is_outstanding = 0;
@@ -3614,9 +3641,20 @@ sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
 					sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
 				} else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
 					sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
+				} else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
+					/*
+					 * Set it up so we don't stop
+					 * retransmitting
+					 */
+					stcb->asoc.str_reset_seq_out--;
+					asoc->stream_reset_out_is_outstanding = 1;
+					no_clear = 1;
 				} else {
 					sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
 				}
+				if (no_clear == 0) {
+					sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
+				}
 			} else if (type == SCTP_STR_RESET_IN_REQUEST) {
 				req_in_param = (struct sctp_stream_reset_in_request *)req_param;
 				number_entries = (lparm_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
@@ -3643,7 +3681,12 @@ sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
 					asoc->stream_reset_outstanding--;
 				if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
 					/* Put the new streams into effect */
-					stcb->asoc.streamoutcnt += num_stream;
+					int i;
+
+					for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
+						asoc->strmout[i].state = SCTP_STREAM_OPEN;
+					}
+					asoc->streamoutcnt += num_stream;
 					sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
 				} else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
 					sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
@@ -3720,6 +3763,9 @@ sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
 			}
 		}
 	}
+	if (asoc->stream_reset_outstanding == 0) {
+		sctp_send_stream_reset_out_if_possible(stcb);
+	}
 	return (0);
 }
 
@@ -3750,22 +3796,33 @@ sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
 		} else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
 			len = ntohs(req->ph.param_length);
 			number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
-			for (i = 0; i < number_entries; i++) {
-				temp = ntohs(req->list_of_streams[i]);
-				req->list_of_streams[i] = temp;
+			if (number_entries) {
+				for (i = 0; i < number_entries; i++) {
+					temp = ntohs(req->list_of_streams[i]);
+					if (temp >= stcb->asoc.streamoutcnt) {
+						asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
+						goto bad_boy;
+					}
+					req->list_of_streams[i] = temp;
+				}
+				for (i = 0; i < number_entries; i++) {
+					if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
+						stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
+					}
+				}
+			} else {
+				/* Its all */
+				for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
+					if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
+						stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
+				}
 			}
 			asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
-			sctp_add_stream_reset_out(chk, number_entries, req->list_of_streams,
-			    asoc->str_reset_seq_out,
-			    seq, (asoc->sending_seq - 1));
-			asoc->stream_reset_out_is_outstanding = 1;
-			asoc->str_reset = chk;
-			sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
-			stcb->asoc.stream_reset_outstanding++;
 		} else {
 			/* Can't do it, since we have sent one out */
 			asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
 		}
+bad_boy:
 		sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
 		asoc->str_reset_seq_in++;
 	} else if (asoc->str_reset_seq_in - 1 == seq) {
@@ -3775,6 +3832,7 @@ sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
 	} else {
 		sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
 	}
+	sctp_send_stream_reset_out_if_possible(stcb);
 }
 
 static int
@@ -3893,11 +3951,12 @@ sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
 				sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
 				return;
 			}
+			liste->seq = seq;
 			liste->tsn = tsn;
 			liste->number_entries = number_entries;
 			memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
 			TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
-			asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
+			asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
 		}
 		sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
 		asoc->str_reset_seq_in++;
@@ -4034,7 +4093,7 @@ sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk
 			mychk += num_stream;
 			if (mychk < 0x10000) {
 				stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
-				if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 0, 1, num_stream, 0, 1)) {
+				if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
 					stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
 				}
 			} else {
diff --git a/sys/netinet/sctp_output.c b/sys/netinet/sctp_output.c
index 0cdeb94..1b1a976 100644
--- a/sys/netinet/sctp_output.c
+++ b/sys/netinet/sctp_output.c
@@ -7162,6 +7162,10 @@ one_more_time:
 			}
 			atomic_subtract_int(&asoc->stream_queue_cnt, 1);
 			TAILQ_REMOVE(&strq->outqueue, sp, next);
+			if (strq->state == SCTP_STREAM_RESET_PENDING &&
+			    TAILQ_EMPTY(&strq->outqueue)) {
+				stcb->asoc.trigger_reset = 1;
+			}
 			stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
 			if (sp->net) {
 				sctp_free_remote_addr(sp->net);
@@ -7560,6 +7564,10 @@ dont_do_it:
 			send_lock_up = 1;
 		}
 		TAILQ_REMOVE(&strq->outqueue, sp, next);
+		if (strq->state == SCTP_STREAM_RESET_PENDING &&
+		    TAILQ_EMPTY(&strq->outqueue)) {
+			stcb->asoc.trigger_reset = 1;
+		}
 		stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
 		if (sp->net) {
 			sctp_free_remote_addr(sp->net);
@@ -7787,7 +7795,7 @@ sctp_med_chunk_output(struct sctp_inpcb *inp,
 #endif
 	SCTP_TCB_LOCK_ASSERT(stcb);
 	hbflag = 0;
-	if ((control_only) || (asoc->stream_reset_outstanding))
+	if (control_only)
 		no_data_chunks = 1;
 	else
 		no_data_chunks = 0;
@@ -9872,7 +9880,9 @@ sctp_chunk_output(struct sctp_inpcb *inp,
 	unsigned int tot_frs = 0;
 
 	asoc = &stcb->asoc;
+do_it_again:
 	/* The Nagle algorithm is only applied when handling a send call. */
+	stcb->asoc.trigger_reset = 0;
 	if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
 		if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
 			nagle_on = 0;
@@ -10108,6 +10118,12 @@ sctp_chunk_output(struct sctp_inpcb *inp,
 	 */
 	if (stcb->asoc.ecn_echo_cnt_onq)
 		sctp_fix_ecn_echo(asoc);
+
+	if (stcb->asoc.trigger_reset) {
+		if (sctp_send_stream_reset_out_if_possible(stcb) == 0) {
+			goto do_it_again;
+		}
+	}
 	return;
 }
 
@@ -11510,30 +11526,58 @@ sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, u
 	asoc->ctrl_queue_cnt++;
 }
 
-void
-sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
-    int number_entries, uint16_t * list,
+static int
+sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
     uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
 {
 	uint16_t len, old_len, i;
 	struct sctp_stream_reset_out_request *req_out;
 	struct sctp_chunkhdr *ch;
+	int at;
+	int number_entries = 0;
 
 	ch = mtod(chk->data, struct sctp_chunkhdr *);
 	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
-
 	/* get to new offset for the param. */
 	req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
 	/* now how long will this param be? */
+	for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
+		if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
+		    (TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue))) {
+			number_entries++;
+		}
+	}
+	if (number_entries == 0) {
+		return (0);
+	}
+	if (number_entries == stcb->asoc.streamoutcnt) {
+		number_entries = 0;
+	}
+	if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
+		number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
+	}
 	len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
 	req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
 	req_out->ph.param_length = htons(len);
 	req_out->request_seq = htonl(seq);
 	req_out->response_seq = htonl(resp_seq);
 	req_out->send_reset_at_tsn = htonl(last_sent);
+	at = 0;
 	if (number_entries) {
-		for (i = 0; i < number_entries; i++) {
-			req_out->list_of_streams[i] = htons(list[i]);
+		for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
+			if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
+			    (TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue))) {
+				req_out->list_of_streams[at] = htons(i);
+				at++;
+				stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
+				if (at >= number_entries) {
+					break;
+				}
+			}
+		}
+	} else {
+		for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
+			stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
 		}
 	}
 	if (SCTP_SIZE32(len) > len) {
@@ -11550,7 +11594,7 @@ sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
 	chk->book_size_scale = 0;
 	chk->send_size = SCTP_SIZE32(chk->book_size);
 	SCTP_BUF_LEN(chk->data) = chk->send_size;
-	return;
+	return (1);
 }
 
 static void
@@ -11652,6 +11696,68 @@ sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
 }
 
 void
+sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
+    struct sctp_stream_reset_list *ent,
+    int response)
+{
+	struct sctp_association *asoc;
+	struct sctp_tmit_chunk *chk;
+	struct sctp_chunkhdr *ch;
+
+	asoc = &stcb->asoc;
+
+	/*
+	 * Reset our last reset action to the new one IP -> response
+	 * (PERFORMED probably). This assures that if we fail to send, a
+	 * retran from the peer will get the new response.
+	 */
+	asoc->last_reset_action[0] = response;
+	if (asoc->stream_reset_outstanding) {
+		return;
+	}
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+		return;
+	}
+	chk->copy_by_ref = 0;
+	chk->rec.chunk_id.id = SCTP_STREAM_RESET;
+	chk->rec.chunk_id.can_take_data = 0;
+	chk->flags = 0;
+	chk->asoc = &stcb->asoc;
+	chk->book_size = sizeof(struct sctp_chunkhdr);
+	chk->send_size = SCTP_SIZE32(chk->book_size);
+	chk->book_size_scale = 0;
+	chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
+	if (chk->data == NULL) {
+		sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+		return;
+	}
+	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+	sctp_add_stream_reset_result(chk, ent->seq, response);
+	/* setup chunk parameters */
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	if (stcb->asoc.alternate) {
+		chk->whoTo = stcb->asoc.alternate;
+	} else {
+		chk->whoTo = stcb->asoc.primary_destination;
+	}
+	ch = mtod(chk->data, struct sctp_chunkhdr *);
+	ch->chunk_type = SCTP_STREAM_RESET;
+	ch->chunk_flags = 0;
+	ch->chunk_length = htons(chk->book_size);
+	atomic_add_int(&chk->whoTo->ref_count, 1);
+	SCTP_BUF_LEN(chk->data) = chk->send_size;
+	/* insert the chunk for sending */
+	TAILQ_INSERT_TAIL(&asoc->control_send_queue,
+	    chk,
+	    sctp_next);
+	asoc->ctrl_queue_cnt++;
+}
+
+void
 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
     uint32_t resp_seq, uint32_t result,
     uint32_t send_una, uint32_t recv_next)
@@ -11749,19 +11855,85 @@ sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
 }
 
 int
+sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb)
+{
+	struct sctp_association *asoc;
+	struct sctp_tmit_chunk *chk;
+	struct sctp_chunkhdr *ch;
+	uint32_t seq;
+
+	asoc = &stcb->asoc;
+	if (asoc->stream_reset_outstanding) {
+		return (EALREADY);
+	}
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+		return (ENOMEM);
+	}
+	chk->copy_by_ref = 0;
+	chk->rec.chunk_id.id = SCTP_STREAM_RESET;
+	chk->rec.chunk_id.can_take_data = 0;
+	chk->flags = 0;
+	chk->asoc = &stcb->asoc;
+	chk->book_size = sizeof(struct sctp_chunkhdr);
+	chk->send_size = SCTP_SIZE32(chk->book_size);
+	chk->book_size_scale = 0;
+	chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
+	if (chk->data == NULL) {
+		sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+		return (ENOMEM);
+	}
+	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+
+	/* setup chunk parameters */
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	if (stcb->asoc.alternate) {
+		chk->whoTo = stcb->asoc.alternate;
+	} else {
+		chk->whoTo = stcb->asoc.primary_destination;
+	}
+	ch = mtod(chk->data, struct sctp_chunkhdr *);
+	ch->chunk_type = SCTP_STREAM_RESET;
+	ch->chunk_flags = 0;
+	ch->chunk_length = htons(chk->book_size);
+	atomic_add_int(&chk->whoTo->ref_count, 1);
+	SCTP_BUF_LEN(chk->data) = chk->send_size;
+	seq = stcb->asoc.str_reset_seq_out;
+	if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
+		seq++;
+		asoc->stream_reset_outstanding++;
+	} else {
+		m_freem(chk->data);
+		chk->data = NULL;
+		sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
+		return (ENOENT);
+	}
+	asoc->str_reset = chk;
+	/* insert the chunk for sending */
+	TAILQ_INSERT_TAIL(&asoc->control_send_queue,
+	    chk,
+	    sctp_next);
+	asoc->ctrl_queue_cnt++;
+	sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
+	return (0);
+}
+
+int
 sctp_send_str_reset_req(struct sctp_tcb *stcb,
     uint16_t number_entries, uint16_t * list,
-    uint8_t send_out_req,
     uint8_t send_in_req,
     uint8_t send_tsn_req,
     uint8_t add_stream,
     uint16_t adding_o,
     uint16_t adding_i, uint8_t peer_asked)
 {
-
 	struct sctp_association *asoc;
 	struct sctp_tmit_chunk *chk;
 	struct sctp_chunkhdr *ch;
+	int can_send_out_req = 0;
 	uint32_t seq;
 
 	asoc = &stcb->asoc;
@@ -11772,16 +11944,18 @@ sctp_send_str_reset_req(struct sctp_tcb *stcb,
 		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
 		return (EBUSY);
 	}
-	if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
+	if ((send_in_req == 0) && (send_tsn_req == 0) &&
 	    (add_stream == 0)) {
 		/* nothing to do */
 		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 		return (EINVAL);
 	}
-	if (send_tsn_req && (send_out_req || send_in_req)) {
+	if (send_tsn_req && send_in_req) {
 		/* error, can't do that */
 		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
 		return (EINVAL);
+	} else if (send_in_req) {
+		can_send_out_req = 1;
 	}
 	if (number_entries > (MCLBYTES -
 	    SCTP_MIN_OVERHEAD -
@@ -11829,12 +12003,14 @@ sctp_send_str_reset_req(struct sctp_tcb *stcb,
 	SCTP_BUF_LEN(chk->data) = chk->send_size;
 
 	seq = stcb->asoc.str_reset_seq_out;
-	if (send_out_req) {
-		sctp_add_stream_reset_out(chk, number_entries, list,
-		    seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
-		asoc->stream_reset_out_is_outstanding = 1;
-		seq++;
-		asoc->stream_reset_outstanding++;
+	if (can_send_out_req) {
+		int ret;
+
+		ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
+		if (ret) {
+			seq++;
+			asoc->stream_reset_outstanding++;
+		}
 	}
 	if ((add_stream & 1) &&
 	    ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
@@ -11874,6 +12050,7 @@ sctp_send_str_reset_req(struct sctp_tcb *stcb,
 			stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
 			stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
 			stcb->asoc.strmout[i].stream_no = i;
+			stcb->asoc.strmout[i].state = oldstream[i].state;
 			stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
 			/* now anything on those queues? */
 			TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
@@ -11906,6 +12083,7 @@ sctp_send_str_reset_req(struct sctp_tcb *stcb,
 			stcb->asoc.strmout[i].stream_no = i;
 			stcb->asoc.strmout[i].last_msg_incomplete = 0;
 			stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
+			stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
 		}
 		stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
 		SCTP_FREE(oldstream, SCTP_M_STRMO);
@@ -12515,12 +12693,24 @@ sctp_lower_sosend(struct socket *so,
 		SCTP_ASOC_CREATE_UNLOCK(inp);
 		create_lock_applied = 0;
 	}
-	if (asoc->stream_reset_outstanding) {
+	/* Is the stream no. valid? */
+	if (srcv->sinfo_stream >= asoc->streamoutcnt) {
+		/* Invalid stream number */
+		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+		error = EINVAL;
+		goto out_unlocked;
+	}
+	if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
+	    (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
 		/*
 		 * Can't queue any data while stream reset is underway.
 		 */
-		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
-		error = EAGAIN;
+		if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
+			error = EAGAIN;
+		} else {
+			error = EINVAL;
+		}
+		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
 		goto out_unlocked;
 	}
 	if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
@@ -12659,13 +12849,6 @@ sctp_lower_sosend(struct socket *so,
 		SCTP_TCB_UNLOCK(stcb);
 		hold_tcblock = 0;
 	}
-	/* Is the stream no. valid? */
-	if (srcv->sinfo_stream >= asoc->streamoutcnt) {
-		/* Invalid stream number */
-		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
-		error = EINVAL;
-		goto out_unlocked;
-	}
 	if (asoc->strmout == NULL) {
 		/* huh? software error */
 		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
@@ -12961,7 +13144,7 @@ skip_preblock:
 				/*-
 				 * Ok, Nagle is set on and we have data outstanding.
 				 * Don't send anything and let SACKs drive out the
-				 * data unless wen have a "full" segment to send.
+				 * data unless we have a "full" segment to send.
 				 */
 				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
 					sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
diff --git a/sys/netinet/sctp_output.h b/sys/netinet/sctp_output.h
index 8e45e5c..8fd5659 100644
--- a/sys/netinet/sctp_output.h
+++ b/sys/netinet/sctp_output.h
@@ -170,18 +170,21 @@ void sctp_send_cwr(struct sctp_tcb *, struct sctp_nets *, uint32_t, uint8_t);
 
 
 void
-sctp_add_stream_reset_out(struct sctp_tmit_chunk *,
-    int, uint16_t *, uint32_t, uint32_t, uint32_t);
+     sctp_add_stream_reset_result(struct sctp_tmit_chunk *, uint32_t, uint32_t);
 
 void
-     sctp_add_stream_reset_result(struct sctp_tmit_chunk *, uint32_t, uint32_t);
+sctp_send_deferred_reset_response(struct sctp_tcb *,
+    struct sctp_stream_reset_list *,
+    int);
 
 void
 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *,
     uint32_t, uint32_t, uint32_t, uint32_t);
+int
+    sctp_send_stream_reset_out_if_possible(struct sctp_tcb *);
 
 int
-sctp_send_str_reset_req(struct sctp_tcb *, uint16_t, uint16_t *, uint8_t,
+sctp_send_str_reset_req(struct sctp_tcb *, uint16_t, uint16_t *,
     uint8_t, uint8_t, uint8_t, uint16_t, uint16_t, uint8_t);
 
 void
diff --git a/sys/netinet/sctp_structs.h b/sys/netinet/sctp_structs.h
index 8f61cd7..eda99fe 100644
--- a/sys/netinet/sctp_structs.h
+++ b/sys/netinet/sctp_structs.h
@@ -76,6 +76,7 @@ TAILQ_HEAD(sctpnetlisthead, sctp_nets);
 
 struct sctp_stream_reset_list {
 	TAILQ_ENTRY(sctp_stream_reset_list) next_resp;
+	uint32_t seq;
 	uint32_t tsn;
 	uint32_t number_entries;
 	uint16_t list_of_streams[];
@@ -580,11 +581,20 @@ union scheduling_parameters {
 	struct ss_fb fb;
 };
 
+/* States for outgoing streams */
+#define SCTP_STREAM_CLOSED           0x00
+#define SCTP_STREAM_OPENING          0x01
+#define SCTP_STREAM_OPEN             0x02
+#define SCTP_STREAM_RESET_PENDING    0x03
+#define SCTP_STREAM_RESET_IN_FLIGHT  0x04
+
+#define SCTP_MAX_STREAMS_AT_ONCE_RESET 200
+
 /* This struct is used to track the traffic on outbound streams */
 struct sctp_stream_out {
 	struct sctp_streamhead outqueue;
 	union scheduling_parameters ss_params;
-	uint32_t chunks_on_queues;
+	uint32_t chunks_on_queues;	/* send queue and sent queue */
 #if defined(SCTP_DETAILED_STR_STATS)
 	uint32_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1];
 	uint32_t abandoned_sent[SCTP_PR_SCTP_MAX + 1];
@@ -596,6 +606,7 @@ struct sctp_stream_out {
 	uint16_t stream_no;
 	uint16_t next_sequence_send;	/* next one I expect to send out */
 	uint8_t last_msg_incomplete;
+	uint8_t state;
 };
 
 /* used to keep track of the addresses yet to try to add/delete */
@@ -1148,7 +1159,7 @@ struct sctp_association {
 	uint8_t hb_random_idx;
 	uint8_t default_dscp;
 	uint8_t asconf_del_pending;	/* asconf delete last addr pending */
-
+	uint8_t trigger_reset;
 	/*
 	 * This value, plus all other ack'd but above cum-ack is added
 	 * together to cross check against the bit that we have yet to
diff --git a/sys/netinet/sctp_usrreq.c b/sys/netinet/sctp_usrreq.c
index 907412c..53a0a0a 100644
--- a/sys/netinet/sctp_usrreq.c
+++ b/sys/netinet/sctp_usrreq.c
@@ -4620,18 +4620,24 @@ sctp_setopt(struct socket *so, int optname, void *optval, size_t optsize,
 				SCTP_TCB_UNLOCK(stcb);
 				break;
 			}
-			if (stcb->asoc.stream_reset_outstanding) {
-				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EALREADY);
-				error = EALREADY;
-				SCTP_TCB_UNLOCK(stcb);
-				break;
-			}
 			if (strrst->srs_flags & SCTP_STREAM_RESET_INCOMING) {
 				send_in = 1;
+				if (stcb->asoc.stream_reset_outstanding) {
+					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EALREADY);
+					error = EALREADY;
+					SCTP_TCB_UNLOCK(stcb);
+					break;
+				}
 			}
 			if (strrst->srs_flags & SCTP_STREAM_RESET_OUTGOING) {
 				send_out = 1;
 			}
+			if ((strrst->srs_number_streams > SCTP_MAX_STREAMS_AT_ONCE_RESET) && send_in) {
+				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOMEM);
+				error = ENOMEM;
+				SCTP_TCB_UNLOCK(stcb);
+				break;
+			}
 			if ((send_in == 0) && (send_out == 0)) {
 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL);
 				error = EINVAL;
@@ -4656,11 +4662,38 @@ sctp_setopt(struct socket *so, int optname, void *optval, size_t optsize,
 				SCTP_TCB_UNLOCK(stcb);
 				break;
 			}
-			error = sctp_send_str_reset_req(stcb, strrst->srs_number_streams,
-			    strrst->srs_stream_list,
-			    send_out, send_in, 0, 0, 0, 0, 0);
+			if (send_out) {
+				int cnt;
+				uint16_t strm;
+
+				if (strrst->srs_number_streams) {
+					for (i = 0, cnt = 0; i < strrst->srs_number_streams; i++) {
+						strm = strrst->srs_stream_list[i];
+						if (stcb->asoc.strmout[strm].state == SCTP_STREAM_OPEN) {
+							stcb->asoc.strmout[strm].state = SCTP_STREAM_RESET_PENDING;
+							cnt++;
+						}
+					}
+				} else {
+					/* Its all */
+					for (i = 0, cnt = 0; i < stcb->asoc.streamoutcnt; i++) {
+						if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN) {
+							stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
+							cnt++;
+						}
+					}
+				}
+			}
+			if (send_in) {
+				error = sctp_send_str_reset_req(stcb, strrst->srs_number_streams,
+				    strrst->srs_stream_list,
+				    send_in, 0, 0, 0, 0, 0);
+			} else
+				error = sctp_send_stream_reset_out_if_possible(stcb);
+
+			if (!error)
+				sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_STRRST_REQ, SCTP_SO_LOCKED);
 
-			sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_STRRST_REQ, SCTP_SO_LOCKED);
 			SCTP_TCB_UNLOCK(stcb);
 			break;
 		}
@@ -4730,7 +4763,7 @@ sctp_setopt(struct socket *so, int optname, void *optval, size_t optsize,
 					goto skip_stuff;
 				}
 			}
-			error = sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 0, addstream, add_o_strmcnt, add_i_strmcnt, 0);
+			error = sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, addstream, add_o_strmcnt, add_i_strmcnt, 0);
 			sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_STRRST_REQ, SCTP_SO_LOCKED);
 	skip_stuff:
 			SCTP_TCB_UNLOCK(stcb);
@@ -4738,6 +4771,7 @@ sctp_setopt(struct socket *so, int optname, void *optval, size_t optsize,
 		}
 	case SCTP_RESET_ASSOC:
 		{
+			int i;
 			uint32_t *value;
 
 			SCTP_CHECK_AND_CAST(value, optval, uint32_t, optsize);
@@ -4762,7 +4796,25 @@ sctp_setopt(struct socket *so, int optname, void *optval, size_t optsize,
 				SCTP_TCB_UNLOCK(stcb);
 				break;
 			}
-			error = sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, 0, 0, 0, 0);
+			/*
+			 * Is there any data pending in the send or sent
+			 * queues?
+			 */
+			if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
+			    !TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
+		busy_out:
+				error = EBUSY;
+				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error);
+				SCTP_TCB_UNLOCK(stcb);
+				break;
+			}
+			/* Do any streams have data queued? */
+			for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
+				if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
+					goto busy_out;
+				}
+			}
+			error = sctp_send_str_reset_req(stcb, 0, NULL, 0, 1, 0, 0, 0, 0);
 			sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_STRRST_REQ, SCTP_SO_LOCKED);
 			SCTP_TCB_UNLOCK(stcb);
 			break;
diff --git a/sys/netinet/sctputil.c b/sys/netinet/sctputil.c
index c25ec39..b613992 100644
--- a/sys/netinet/sctputil.c
+++ b/sys/netinet/sctputil.c
@@ -1089,6 +1089,7 @@ sctp_init_asoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
 #endif
 		asoc->strmout[i].stream_no = i;
 		asoc->strmout[i].last_msg_incomplete = 0;
+		asoc->strmout[i].state = SCTP_STREAM_OPENING;
 		asoc->ss_functions.sctp_ss_init_stream(&asoc->strmout[i], NULL);
 	}
 	asoc->ss_functions.sctp_ss_init(stcb, asoc, 0);
@@ -6855,7 +6856,7 @@ sctp_log_trace(uint32_t subsys, const char *str SCTP_UNUSED, uint32_t a, uint32_
 
 #endif
 static void
-sctp_recv_udp_tunneled_packet(struct mbuf *m, int off, struct inpcb *ignored,
+sctp_recv_udp_tunneled_packet(struct mbuf *m, int off, struct inpcb *inp,
     const struct sockaddr *sa SCTP_UNUSED, void *ctx SCTP_UNUSED)
 {
 	struct ip *iph;