diff --git a/libknet/threads_tx.c b/libknet/threads_tx.c
index fcf5915e..7ef7243b 100644
--- a/libknet/threads_tx.c
+++ b/libknet/threads_tx.c
@@ -1,999 +1,997 @@
 /*
  * Copyright (C) 2012-2023 Red Hat, Inc.  All rights reserved.
  *
  * Authors: Fabio M. Di Nitto <fabbione@kronosnet.org>
  *          Federico Simoncelli <fsimon@kronosnet.org>
  *
  * This software licensed under LGPL-2.0+
  */
 
 #include "config.h"
 
 #include <string.h>
 #include <pthread.h>
 #include <unistd.h>
 #include <sys/uio.h>
 #include <errno.h>
 
 #include "compat.h"
 #include "compress.h"
 #include "crypto.h"
 #include "host.h"
 #include "link.h"
 #include "logging.h"
 #include "transports.h"
 #include "transport_common.h"
 #include "threads_common.h"
 #include "threads_heartbeat.h"
 #include "threads_tx.h"
 #include "netutils.h"
 #include "onwire_v1.h"
 
 /*
  * SEND
  */
 
 static int _dispatch_to_links(knet_handle_t knet_h, struct knet_host *dst_host, struct knet_mmsghdr *msg, int msgs_to_send)
 {
 	int link_idx, msg_idx, sent_msgs, prev_sent, progress;
 	int err = 0, savederrno = 0, locked = 0;
 	unsigned int i;
 	struct knet_mmsghdr *cur;
 	struct knet_link *cur_link;
 
 	for (link_idx = 0; link_idx < dst_host->active_link_entries; link_idx++) {
 		prev_sent = 0;
 		progress = 1;
 		locked = 0;
 
 		cur_link = &dst_host->link[dst_host->active_links[link_idx]];
 
 		if (cur_link->transport == KNET_TRANSPORT_LOOPBACK) {
 			continue;
 		}
 
 		savederrno = pthread_mutex_lock(&cur_link->link_stats_mutex);
 		if (savederrno) {
 			log_err(knet_h, KNET_SUB_TX, "Unable to get stats mutex lock for host %u link %u: %s",
 				dst_host->host_id, cur_link->link_id, strerror(savederrno));
 			continue;
 		}
 		locked = 1;
 
 		msg_idx = 0;
 		while (msg_idx < msgs_to_send) {
 			msg[msg_idx].msg_hdr.msg_name = &cur_link->dst_addr;
 			msg[msg_idx].msg_hdr.msg_namelen = knet_h->knet_transport_fd_tracker[cur_link->outsock].sockaddr_len;
 
 			/* Cast for Linux/BSD compatibility */
 			for (i=0; i<(unsigned int)msg[msg_idx].msg_hdr.msg_iovlen; i++) {
 				cur_link->status.stats.tx_data_bytes += msg[msg_idx].msg_hdr.msg_iov[i].iov_len;
 			}
 			cur_link->status.stats.tx_data_packets++;
 			msg_idx++;
 		}
 
 retry:
 		cur = &msg[prev_sent];
 
 		sent_msgs = _sendmmsg(dst_host->link[dst_host->active_links[link_idx]].outsock,
 				      transport_get_connection_oriented(knet_h, dst_host->link[dst_host->active_links[link_idx]].transport),
 				      &cur[0], msgs_to_send - prev_sent, MSG_DONTWAIT | MSG_NOSIGNAL);
 		savederrno = errno;
 
 		err = transport_tx_sock_error(knet_h, dst_host->link[dst_host->active_links[link_idx]].transport, dst_host->link[dst_host->active_links[link_idx]].outsock, KNET_SUB_TX, sent_msgs, savederrno);
 		switch(err) {
 			case KNET_TRANSPORT_SOCK_ERROR_INTERNAL:
 				cur_link->status.stats.tx_data_errors++;
 				goto out_unlock;
 				break;
 			case KNET_TRANSPORT_SOCK_ERROR_IGNORE:
 				break;
 			case KNET_TRANSPORT_SOCK_ERROR_RETRY:
 				cur_link->status.stats.tx_data_retries++;
 				goto retry;
 				break;
 		}
 
 		prev_sent = prev_sent + sent_msgs;
 
 		if ((sent_msgs >= 0) && (prev_sent < msgs_to_send)) {
 			if ((sent_msgs) || (progress)) {
 				if (sent_msgs) {
 					progress = 1;
 				} else {
 					progress = 0;
 				}
-#ifdef DEBUG
-				log_debug(knet_h, KNET_SUB_TX, "Unable to send all (%d/%d) data packets to host %s (%u) link %s:%s (%u)",
+				log_trace(knet_h, KNET_SUB_TX, "Unable to send all (%d/%d) data packets to host %s (%u) link %s:%s (%u)",
 					  sent_msgs, msg_idx,
 					  dst_host->name, dst_host->host_id,
 					  dst_host->link[dst_host->active_links[link_idx]].status.dst_ipaddr,
 					  dst_host->link[dst_host->active_links[link_idx]].status.dst_port,
 					  dst_host->link[dst_host->active_links[link_idx]].link_id);
-#endif
 				goto retry;
 			}
 			if (!progress) {
 				savederrno = EAGAIN;
 				err = -1;
 				goto out_unlock;
 			}
 		}
 
 		if ((dst_host->link_handler_policy == KNET_LINK_POLICY_RR) &&
 		    (dst_host->active_link_entries > 1)) {
 			uint8_t cur_link_id = dst_host->active_links[0];
 
 			memmove(&dst_host->active_links[0], &dst_host->active_links[1], KNET_MAX_LINK - 1);
 			dst_host->active_links[dst_host->active_link_entries - 1] = cur_link_id;
 
 			break;
 		}
 		pthread_mutex_unlock(&cur_link->link_stats_mutex);
 		locked = 0;
 	}
 
 out_unlock:
 	if (locked) {
 		pthread_mutex_unlock(&cur_link->link_stats_mutex);
 	}
 	errno = savederrno;
 	return err;
 }
 
 static int _dispatch_to_local(knet_handle_t knet_h, unsigned char *data, size_t inlen, int8_t channel)
 {
 	int err = 0, savederrno = 0;
 	const unsigned char *buf = data;
 	ssize_t buflen = inlen;
 	struct knet_link *local_link = knet_h->host_index[knet_h->host_id]->link;
 
 local_retry:
 	err = write(knet_h->sockfd[channel].sockfd[knet_h->sockfd[channel].is_created], buf, buflen);
 	savederrno = errno;
 	if (err < 0) {
 		log_err(knet_h, KNET_SUB_TRANSP_LOOPBACK, "send local failed. error=%s\n", strerror(errno));
 		local_link->status.stats.tx_data_errors++;
 		goto out;
 	}
 	if (err > 0 && err < buflen) {
 		log_debug(knet_h, KNET_SUB_TRANSP_LOOPBACK, "send local incomplete=%d bytes of %zu\n", err, inlen);
 		local_link->status.stats.tx_data_retries++;
 		buf += err;
 		buflen -= err;
 		goto local_retry;
 	}
 	if (err == buflen) {
 		local_link->status.stats.tx_data_packets++;
 		local_link->status.stats.tx_data_bytes += inlen;
 	}
 out:
 	errno = savederrno;
 	return err;
 }
 
 static int _prep_tx_bufs(knet_handle_t knet_h,
 			  struct knet_header *inbuf, uint8_t onwire_ver,
 			  unsigned char *data, size_t inlen, uint32_t data_checksum,
 			  seq_num_t tx_seq_num, int8_t channel, int bcast, int data_compressed,
 			  int *msgs_to_send, struct iovec iov_out[PCKT_FRAG_MAX][2], int *iovcnt_out)
 {
 	int err = 0, savederrno = 0;
 	unsigned int temp_data_mtu;
 
 	if (!knet_h->data_mtu) {
 		/*
 		 * using MIN_MTU_V4 for data mtu is not completely accurate but safe enough
 		 */
 		log_debug(knet_h, KNET_SUB_TX,
 			  "Received data packet but data MTU is still unknown."
 			  " Packet might not be delivered."
 			  " Assuming minimum IPv4 MTU (%d)",
 			  KNET_PMTUD_MIN_MTU_V4);
 		temp_data_mtu = KNET_PMTUD_MIN_MTU_V4;
 	} else {
 		/*
 		 * take a copy of the mtu to avoid value changing under
 		 * our feet while we are sending a fragmented pckt
 		 */
 		temp_data_mtu = knet_h->data_mtu;
 	}
 
 	if (knet_h->onwire_ver_remap) {
 		prep_tx_bufs_v1(knet_h, inbuf, data, inlen, data_checksum, temp_data_mtu, tx_seq_num, channel, bcast, data_compressed, msgs_to_send, iov_out, iovcnt_out);
 	} else {
 		switch (onwire_ver) {
 			case 1:
 				prep_tx_bufs_v1(knet_h, inbuf, data, inlen, data_checksum, temp_data_mtu, tx_seq_num, channel, bcast, data_compressed, msgs_to_send, iov_out, iovcnt_out);
 				break;
 			default: /* this should never hit as filters are in place in the calling functions */
 				log_warn(knet_h, KNET_SUB_TX, "preparing data onwire version %u not supported", onwire_ver);
 				savederrno = EINVAL;
 				err = -1;
 				goto out;
 				break;
 		}
 	}
 
 out:
 	errno = savederrno;
 	return err;
 }
 
 static int _compress_data(knet_handle_t knet_h, unsigned char* data, size_t *inlen, int *data_compressed)
 {
 	int err = 0, savederrno = 0;
 	int stats_locked = 0, stats_err = 0;
 	size_t cmp_outlen = KNET_DATABUFSIZE_COMPRESS;
 	struct timespec start_time;
 	struct timespec end_time;
 	uint64_t compress_time;
 
 	/*
 	 * compress data
 	 */
 	if (knet_h->compress_model > 0) {
 		if (*inlen > knet_h->compress_threshold) {
 			clock_gettime(CLOCK_MONOTONIC, &start_time);
 			err = compress(knet_h,
 				       data, *inlen,
 				       knet_h->send_to_links_buf_compress, (ssize_t *)&cmp_outlen);
 
 			savederrno = errno;
 			clock_gettime(CLOCK_MONOTONIC, &end_time);
 			timespec_diff(start_time, end_time, &compress_time);
 
 			stats_err = pthread_mutex_lock(&knet_h->handle_stats_mutex);
 			if (stats_err < 0) {
 				log_err(knet_h, KNET_SUB_TX, "Unable to get mutex lock: %s", strerror(stats_err));
 				err = -1;
 				savederrno = stats_err;
 				goto out;
 			}
 			stats_locked = 1;
 			/* Collect stats */
 
 			if (compress_time < knet_h->stats.tx_compress_time_min) {
 				knet_h->stats.tx_compress_time_min = compress_time;
 			}
 			if (compress_time > knet_h->stats.tx_compress_time_max) {
 				knet_h->stats.tx_compress_time_max = compress_time;
 			}
 			knet_h->stats.tx_compress_time_ave =
 				(unsigned long long)(knet_h->stats.tx_compress_time_ave * knet_h->stats.tx_compressed_packets +
 				 compress_time) / (knet_h->stats.tx_compressed_packets+1);
 			if (err < 0) {
 				knet_h->stats.tx_failed_to_compress++;
 				log_warn(knet_h, KNET_SUB_COMPRESS, "Compression failed (%d): %s", err, strerror(savederrno));
 			} else {
 				knet_h->stats.tx_compressed_packets++;
 				knet_h->stats.tx_compressed_original_bytes += *inlen;
 				knet_h->stats.tx_compressed_size_bytes += cmp_outlen;
 
 				if (cmp_outlen < *inlen) {
 					memmove(data, knet_h->send_to_links_buf_compress, cmp_outlen);
 					*inlen = cmp_outlen;
 					*data_compressed = 1;
 				} else {
 					knet_h->stats.tx_unable_to_compress++;
 				}
 			}
 		}
 		if (!*data_compressed) {
 			if (!stats_locked) {
 				stats_err = pthread_mutex_lock(&knet_h->handle_stats_mutex);
 				if (stats_err < 0) {
 					log_err(knet_h, KNET_SUB_TX, "Unable to get mutex lock: %s", strerror(stats_err));
 					err = -1;
 					savederrno = stats_err;
 					goto out;
 				}
 				stats_locked = 1;
 			}
 			knet_h->stats.tx_uncompressed_packets++;
 		}
 		if (stats_locked) {
 			pthread_mutex_unlock(&knet_h->handle_stats_mutex);
 		}
 	}
 
 out:
 	errno = savederrno;
 	return err;
 }
 
 static int _encrypt_bufs(knet_handle_t knet_h, int msgs_to_send, struct iovec iov_out[PCKT_FRAG_MAX][2], int *iovcnt_out)
 {
 	int err = 0, savederrno = 0, stats_err = 0;
 	struct timespec start_time;
 	struct timespec end_time;
 	uint64_t crypt_time;
 	uint8_t frag_idx = 0;
 	size_t outlen, uncrypted_frag_size;
 	int j;
 
 	if (knet_h->crypto_in_use_config) {
 		while (frag_idx < msgs_to_send) {
 			clock_gettime(CLOCK_MONOTONIC, &start_time);
 			if (crypto_encrypt_and_signv(
 					knet_h,
 					iov_out[frag_idx], *iovcnt_out,
 					knet_h->send_to_links_buf_crypt[frag_idx],
 					(ssize_t *)&outlen) < 0) {
 				log_debug(knet_h, KNET_SUB_TX, "Unable to encrypt packet");
 				savederrno = ECHILD;
 				err = -1;
 				goto out;
 			}
 			clock_gettime(CLOCK_MONOTONIC, &end_time);
 			timespec_diff(start_time, end_time, &crypt_time);
 
 			stats_err = pthread_mutex_lock(&knet_h->handle_stats_mutex);
 			if (stats_err < 0) {
 				log_err(knet_h, KNET_SUB_TX, "Unable to get mutex lock: %s", strerror(stats_err));
 				err = -1;
 				savederrno = stats_err;
 				goto out;
 			}
 
 			if (crypt_time < knet_h->stats.tx_crypt_time_min) {
 				knet_h->stats.tx_crypt_time_min = crypt_time;
 			}
 			if (crypt_time > knet_h->stats.tx_crypt_time_max) {
 				knet_h->stats.tx_crypt_time_max = crypt_time;
 			}
 			knet_h->stats.tx_crypt_time_ave =
 				(knet_h->stats.tx_crypt_time_ave * knet_h->stats.tx_crypt_packets +
 				 crypt_time) / (knet_h->stats.tx_crypt_packets+1);
 
 			uncrypted_frag_size = 0;
 			for (j=0; j < *iovcnt_out; j++) {
 				uncrypted_frag_size += iov_out[frag_idx][j].iov_len;
 			}
 			knet_h->stats.tx_crypt_byte_overhead += (outlen - uncrypted_frag_size);
 			knet_h->stats.tx_crypt_packets++;
 			pthread_mutex_unlock(&knet_h->handle_stats_mutex);
 
 			iov_out[frag_idx][0].iov_base = knet_h->send_to_links_buf_crypt[frag_idx];
 			iov_out[frag_idx][0].iov_len = outlen;
 			frag_idx++;
 		}
 		*iovcnt_out = 1;
 	}
 out:
 	errno = savederrno;
 	return err;
 }
 
 static int _get_tx_seq_num(knet_handle_t knet_h, seq_num_t *tx_seq_num)
 {
 	int savederrno = 0;
 
 	savederrno = pthread_mutex_lock(&knet_h->tx_seq_num_mutex);
 	if (savederrno) {
 		log_debug(knet_h, KNET_SUB_TX, "Unable to get seq mutex lock");
 		errno = savederrno;
 		return -1;
 	}
 
 	knet_h->tx_seq_num++;
 	/*
 	 * force seq_num 0 to detect a node that has crashed and rejoining
 	 * the knet instance. seq_num 0 will clear the buffers in the RX
 	 * thread
 	 */
 	if (knet_h->tx_seq_num == 0) {
 		knet_h->tx_seq_num++;
 	}
 	/*
 	 * cache the value in locked context
 	 */
 	*tx_seq_num = knet_h->tx_seq_num;
 	pthread_mutex_unlock(&knet_h->tx_seq_num_mutex);
 
 	/*
 	 * forcefully broadcast a ping to all nodes every SEQ_MAX / 8
 	 * pckts.
 	 * this solves 2 problems:
 	 * 1) on TX socket overloads we generate extra pings to keep links alive
 	 * 2) in 3+ nodes setup, where all the traffic is flowing between node 1 and 2,
 	 *    node 3+ will be able to keep in sync on the TX seq_num even without
 	 *    receiving traffic or pings in betweens. This avoids issues with
 	 *    rollover of the circular buffer
 	 */
 
 	if (*tx_seq_num % (SEQ_MAX / 8) == 0) {
 		_send_pings(knet_h, 0);
 	}
 	return 0;
 }
 
 
 static int _get_data_dests(knet_handle_t knet_h, unsigned char* data, size_t inlen,
 			   int8_t *channel, int *bcast, int *send_local,
 			   knet_node_id_t *dst_host_ids, size_t *dst_host_ids_entries,
 			   int is_sync)
 {
 	int err = 0, savederrno = 0;
 	knet_node_id_t dst_host_ids_temp[KNET_MAX_HOST];	/* store destinations from filter */
 	size_t dst_host_ids_entries_temp = 0;
 	size_t dst_host_ids_entries_temp2 = 0;			/* workaround gcc here */
 	struct knet_host *dst_host;
 	size_t host_idx;
 
 	memset(dst_host_ids_temp, 0, sizeof(dst_host_ids_temp));
 
 	if (knet_h->dst_host_filter_fn) {
 		*bcast = knet_h->dst_host_filter_fn(
 				knet_h->dst_host_filter_fn_private_data,
 				data,
 				inlen,
 				KNET_NOTIFY_TX,
 				knet_h->host_id,
 				knet_h->host_id,
 				channel,
 				dst_host_ids_temp,
 				&dst_host_ids_entries_temp);
 		if (*bcast < 0) {
 			log_debug(knet_h, KNET_SUB_TX, "Error from dst_host_filter_fn: %d", *bcast);
 			savederrno = EFAULT;
 			err = -1;
 			goto out;
 		}
 
 		if ((!*bcast) && (!dst_host_ids_entries_temp)) {
 			log_debug(knet_h, KNET_SUB_TX, "Message is unicast but no dst_host_ids_entries");
 			savederrno = EINVAL;
 			err = -1;
 			goto out;
 		}
 
 		if ((!*bcast) &&
 		    (dst_host_ids_entries_temp > KNET_MAX_HOST)) {
 			log_debug(knet_h, KNET_SUB_TX, "dst_host_filter_fn returned too many destinations");
 			savederrno = EINVAL;
 			err = -1;
 			goto out;
 		}
 
 		if (is_sync) {
 			if ((*bcast) ||
 			    ((!*bcast) && (dst_host_ids_entries_temp > 1))) {
 				log_debug(knet_h, KNET_SUB_TX, "knet_send_sync is only supported with unicast packets for one destination");
 				savederrno = E2BIG;
 				err = -1;
 				goto out;
 			}
 		}
 	}
 
 	/*
 	 * check destinations hosts before spending time
 	 * in fragmenting/encrypting packets to save
 	 * time processing data for unreachable hosts.
 	 * for unicast, also remap the destination data
 	 * to skip unreachable hosts.
 	 */
 
 	if (!*bcast) {
 		*dst_host_ids_entries = dst_host_ids_entries_temp2;
 		for (host_idx = 0; host_idx < dst_host_ids_entries_temp; host_idx++) {
 			dst_host = knet_h->host_index[dst_host_ids_temp[host_idx]];
 			if (!dst_host) {
 				continue;
 			}
 			if ((dst_host->host_id == knet_h->host_id) &&
 			    (knet_h->has_loop_link)) {
 				*send_local = 1;
 			}
 			if (!((dst_host->host_id == knet_h->host_id) &&
 			     (knet_h->has_loop_link)) &&
 			    dst_host->status.reachable) {
 				dst_host_ids[dst_host_ids_entries_temp2] = dst_host_ids_temp[host_idx];
 				dst_host_ids_entries_temp2++;
 			}
 		}
 		if ((!dst_host_ids_entries_temp2) && (!*send_local)) {
 			savederrno = EHOSTDOWN;
 			err = -1;
 			goto out;
 		}
 		*dst_host_ids_entries = dst_host_ids_entries_temp2;
 	} else {
 		*bcast = 0;
 		*send_local = 0;
 		for (dst_host = knet_h->host_head; dst_host != NULL; dst_host = dst_host->next) {
 			if ((dst_host->host_id == knet_h->host_id) &&
 			    (knet_h->has_loop_link)) {
 				*send_local = 1;
 			}
 			if (!(dst_host->host_id == knet_h->host_id &&
 			      knet_h->has_loop_link) &&
 			    dst_host->status.reachable) {
 				*bcast = 1;
 			}
 		}
 		if ((!*bcast) && (!*send_local)) {
 			savederrno = EHOSTDOWN;
 			err = -1;
 			goto out;
 		}
 	}
 
 out:
 	errno = savederrno;
 	return err;
 }
 
 static int _prep_and_send_msgs(knet_handle_t knet_h, int bcast, knet_node_id_t *dst_host_ids, size_t dst_host_ids_entries, int msgs_to_send, struct iovec iov_out[PCKT_FRAG_MAX][2], int iovcnt_out)
 {
 	int err = 0, savederrno = 0;
 	struct knet_host *dst_host;
 	struct knet_mmsghdr msg[PCKT_FRAG_MAX];
 	int msg_idx;
 	size_t host_idx;
 
 	memset(&msg, 0, sizeof(msg));
 
 	msg_idx = 0;
 
 	while (msg_idx < msgs_to_send) {
 		msg[msg_idx].msg_hdr.msg_namelen = sizeof(struct sockaddr_storage); /* this will set properly in _dispatch_to_links() */
 		msg[msg_idx].msg_hdr.msg_iov = &iov_out[msg_idx][0];
 		msg[msg_idx].msg_hdr.msg_iovlen = iovcnt_out;
 		msg_idx++;
 	}
 
 	if (!bcast) {
 		for (host_idx = 0; host_idx < dst_host_ids_entries; host_idx++) {
 			dst_host = knet_h->host_index[dst_host_ids[host_idx]];
 
 			err = _dispatch_to_links(knet_h, dst_host, &msg[0], msgs_to_send);
 			savederrno = errno;
 			if (err) {
 				goto out;
 			}
 		}
 	} else {
 		for (dst_host = knet_h->host_head; dst_host != NULL; dst_host = dst_host->next) {
 			if (dst_host->status.reachable) {
 				err = _dispatch_to_links(knet_h, dst_host, &msg[0], msgs_to_send);
 				savederrno = errno;
 				if (err) {
 					goto out;
 				}
 			}
 		}
 	}
 
 out:
 	errno = savederrno;
 	return err;
 }
 
 static int _parse_recv_from_sock(knet_handle_t knet_h, size_t inlen, int8_t channel, uint8_t onwire_ver, int is_sync)
 {
 	int err = 0, savederrno = 0;
 	struct knet_header *inbuf = knet_h->recv_from_sock_buf; /* all TX packets are stored here regardless of the onwire */
 	unsigned char *data;					/* onwire neutrual pointer to data to send */
 	int data_compressed = 0;				/* track data compression to fill the header */
 	seq_num_t tx_seq_num;
 	uint32_t data_checksum = 0;				/* used only for debugging at the moment */
 
 	int bcast = 1;						/* assume all packets are to be broadcasted unless filter tells us differently */
 	knet_node_id_t dst_host_ids[KNET_MAX_HOST];		/* store destinations from filter */
 	size_t dst_host_ids_entries = 0;
 	int send_local = 0;					/* send packets to loopback */
 
 	struct iovec iov_out[PCKT_FRAG_MAX][2];
 	int iovcnt_out = 2;
 	int msgs_to_send = 0;
 
 	if (knet_h->enabled != 1) {
 		log_debug(knet_h, KNET_SUB_TX, "Received data packet but forwarding is disabled");
 		savederrno = ECANCELED;
 		err = -1;
 		goto out;
 	}
 
 	if (knet_h->onwire_ver_remap) {
 		data = get_data_v1(knet_h, inbuf);
 	} else {
 		switch (onwire_ver) {
 			case 1:
 				data = get_data_v1(knet_h, inbuf);
 				break;
 			default: /* this should never hit as filters are in place in the calling functions */
 				log_warn(knet_h, KNET_SUB_TX, "preparing data onwire version %u not supported", onwire_ver);
 				savederrno = EINVAL;
 				err = -1;
 				goto out;
 				break;
 		}
 	}
 
 #ifdef ONWIRE_V1_EXTRA_DEBUG
 	data_checksum = compute_chksum(data, inlen);
 #endif
 
 	memset(dst_host_ids, 0, sizeof(dst_host_ids));
 	err = _get_data_dests(knet_h, data, inlen,
 			      &channel, &bcast, &send_local,
 			      dst_host_ids, &dst_host_ids_entries,
 			      is_sync);
 	if (err < 0) {
 		savederrno = errno;
 		goto out;
 	}
 
 	/* Send to localhost if appropriate and enabled */
 	if (send_local) {
 		err = _dispatch_to_local(knet_h, data, inlen, channel);
 		if (err < 0) {
 			savederrno = errno;
 			goto out;
 		}
 	}
 
 	err = _compress_data(knet_h, data, &inlen, &data_compressed);
 	if (err < 0) {
 		savederrno = errno;
 		goto out;
 	}
 
 	err = _get_tx_seq_num(knet_h, &tx_seq_num);
 	if (err < 0) {
 		savederrno = errno;
 		goto out;
 	}
 
 	err = _prep_tx_bufs(knet_h, inbuf, onwire_ver, data, inlen, data_checksum, tx_seq_num, channel, bcast, data_compressed, &msgs_to_send, iov_out, &iovcnt_out);
 	if (err < 0) {
 		savederrno = errno;
 		goto out;
 	}
 
 	err = _encrypt_bufs(knet_h, msgs_to_send, iov_out, &iovcnt_out);
 	if (err < 0) {
 		savederrno = errno;
 		goto out;
 	}
 
 	err = _prep_and_send_msgs(knet_h, bcast, dst_host_ids, dst_host_ids_entries, msgs_to_send, iov_out, iovcnt_out);
 	if (err < 0) {
 		savederrno = errno;
 		goto out;
 	}
 
 out:
 	errno = savederrno;
 	return err;
 }
 
 static void _handle_send_to_links(knet_handle_t knet_h, int sockfd, uint8_t onwire_ver, int8_t channel)
 {
 	ssize_t inlen = 0;
 	int savederrno = 0, docallback = 0;
 	struct iovec iov_in;
 	struct msghdr msg;
 	struct sockaddr_storage address;
 
 	memset(&iov_in, 0, sizeof(iov_in));
 
 	if (knet_h->onwire_ver_remap) {
 		iov_in.iov_base = (void *)get_data_v1(knet_h, knet_h->recv_from_sock_buf);
 		iov_in.iov_len = KNET_MAX_PACKET_SIZE;
 	} else {
 		switch (onwire_ver) {
 			case 1:
 				iov_in.iov_base = (void *)get_data_v1(knet_h, knet_h->recv_from_sock_buf);
 				iov_in.iov_len = KNET_MAX_PACKET_SIZE;
 				break;
 			default:
 				log_warn(knet_h, KNET_SUB_TX, "preparing data onwire version %u not supported", onwire_ver);
 				break;
 		}
 	}
 
 	memset(&msg, 0, sizeof(struct msghdr));
 	msg.msg_name = &address;
 	msg.msg_namelen = knet_h->knet_transport_fd_tracker[sockfd].sockaddr_len;
 	msg.msg_iov = &iov_in;
 	msg.msg_iovlen = 1;
 
 	if ((channel >= 0) &&
 	    (channel < KNET_DATAFD_MAX) &&
 	    (!knet_h->sockfd[channel].is_socket)) {
 		inlen = readv(sockfd, msg.msg_iov, 1);
 	} else {
 		inlen = recvmsg(sockfd, &msg, MSG_DONTWAIT | MSG_NOSIGNAL);
 		if (msg.msg_flags & MSG_TRUNC) {
 			log_warn(knet_h, KNET_SUB_TX, "Received truncated message from sock %d. Discarding", sockfd);
 			return;
 		}
 	}
 
 	if (inlen == 0) {
 		savederrno = 0;
 		docallback = 1;
 	} else if (inlen < 0) {
 		struct epoll_event ev;
 
 		savederrno = errno;
 		docallback = 1;
 		memset(&ev, 0, sizeof(struct epoll_event));
 
 		if (epoll_ctl(knet_h->send_to_links_epollfd,
 			      EPOLL_CTL_DEL, knet_h->sockfd[channel].sockfd[knet_h->sockfd[channel].is_created], &ev)) {
 			log_err(knet_h, KNET_SUB_TX, "Unable to del datafd %d from linkfd epoll pool: %s",
 				knet_h->sockfd[channel].sockfd[0], strerror(savederrno));
 		} else {
 			knet_h->sockfd[channel].has_error = 1;
 		}
 	} else {
 		_parse_recv_from_sock(knet_h, inlen, channel, onwire_ver, 0);
 	}
 
 	if (docallback) {
 		knet_h->sock_notify_fn(knet_h->sock_notify_fn_private_data,
 				       knet_h->sockfd[channel].sockfd[0],
 				       channel,
 				       KNET_NOTIFY_TX,
 				       inlen,
 				       savederrno);
 	}
 }
 
 void *_handle_send_to_links_thread(void *data)
 {
 	knet_handle_t knet_h = (knet_handle_t) data;
 	struct epoll_event events[KNET_EPOLL_MAX_EVENTS + 1]; /* see _init_epolls for + 1 */
 	int i, nev;
 	int flush, flush_queue_limit;
 	int8_t channel;
 	uint8_t onwire_ver;
 
 	set_thread_status(knet_h, KNET_THREAD_TX, KNET_THREAD_STARTED);
 
 	memset(&events, 0, sizeof(events));
 
 	flush_queue_limit = 0;
 
 	while (!shutdown_in_progress(knet_h)) {
 		nev = epoll_wait(knet_h->send_to_links_epollfd, events, KNET_EPOLL_MAX_EVENTS + 1, knet_h->threads_timer_res / 1000);
 
 		flush = get_thread_flush_queue(knet_h, KNET_THREAD_TX);
 
 		/*
 		 * we use timeout to detect if thread is shutting down
 		 */
 		if (nev == 0) {
 			/*
 			 * ideally we want to communicate that we are done flushing
 			 * the queue when we have an epoll timeout event
 			 */
 			if (flush == KNET_THREAD_QUEUE_FLUSH) {
 				set_thread_flush_queue(knet_h, KNET_THREAD_TX, KNET_THREAD_QUEUE_FLUSHED);
 				flush_queue_limit = 0;
 			}
 			continue;
 		}
 
 		/*
 		 * fall back in case the TX sockets will continue receive traffic
 		 * and we do not hit an epoll timeout.
 		 *
 		 * allow up to a 100 loops to flush queues, then we give up.
 		 * there might be more clean ways to do it by checking the buffer queue
 		 * on each socket, but we have tons of sockets and calculations can go wrong.
 		 * Also, why would you disable data forwarding and still send packets?
 		 */
 		if (flush == KNET_THREAD_QUEUE_FLUSH) {
 			if (flush_queue_limit >= 100) {
 				log_debug(knet_h, KNET_SUB_TX, "Timeout flushing the TX queue, expect packet loss");
 				set_thread_flush_queue(knet_h, KNET_THREAD_TX, KNET_THREAD_QUEUE_FLUSHED);
 				flush_queue_limit = 0;
 			} else {
 				flush_queue_limit++;
 			}
 		} else {
 			flush_queue_limit = 0;
 		}
 
 		if (pthread_rwlock_rdlock(&knet_h->global_rwlock) != 0) {
 			log_debug(knet_h, KNET_SUB_TX, "Unable to get read lock");
 			continue;
 		}
 
 		if (pthread_mutex_lock(&knet_h->onwire_mutex)) {
 			log_debug(knet_h, KNET_SUB_TX, "Unable to get onwire mutex lock");
 			goto out_unlock;
 		}
 		onwire_ver = knet_h->onwire_ver;
 		pthread_mutex_unlock(&knet_h->onwire_mutex);
 
 		for (i = 0; i < nev; i++) {
 			for (channel = 0; channel < KNET_DATAFD_MAX; channel++) {
 				if ((knet_h->sockfd[channel].in_use) &&
 				    (knet_h->sockfd[channel].sockfd[knet_h->sockfd[channel].is_created] == events[i].data.fd)) {
 					break;
 				}
 			}
 			if (channel >= KNET_DATAFD_MAX) {
 				log_debug(knet_h, KNET_SUB_TX, "No available channels");
 				continue; /* channel not found */
 			}
 			if (pthread_mutex_lock(&knet_h->tx_mutex) != 0) {
 				log_debug(knet_h, KNET_SUB_TX, "Unable to get mutex lock");
 				continue;
 			}
 			_handle_send_to_links(knet_h, events[i].data.fd, onwire_ver, channel);
 			pthread_mutex_unlock(&knet_h->tx_mutex);
 		}
 out_unlock:
 		pthread_rwlock_unlock(&knet_h->global_rwlock);
 	}
 
 	set_thread_status(knet_h, KNET_THREAD_TX, KNET_THREAD_STOPPED);
 
 	return NULL;
 }
 
 int knet_send_sync(knet_handle_t knet_h, const char *buff, const size_t buff_len, const int8_t channel)
 {
 	int savederrno = 0, err = 0;
 	uint8_t onwire_ver;
 
 	if (!_is_valid_handle(knet_h)) {
 		return -1;
 	}
 
 	if (buff == NULL) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	if (buff_len <= 0) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	if (buff_len > KNET_MAX_PACKET_SIZE) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	if (channel < 0) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	if (channel >= KNET_DATAFD_MAX) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
 	if (savederrno) {
 		log_err(knet_h, KNET_SUB_TX, "Unable to get read lock: %s",
 			strerror(savederrno));
 		errno = savederrno;
 		return -1;
 	}
 
 	if (!knet_h->dst_host_filter_fn) {
 		savederrno = ENETDOWN;
 		err = -1;
 		goto out;
 	}
 
 	if (!knet_h->sockfd[channel].in_use) {
 		savederrno = EINVAL;
 		err = -1;
 		goto out;
 	}
 
 	if (pthread_mutex_lock(&knet_h->onwire_mutex)) {
 		log_debug(knet_h, KNET_SUB_TX, "Unable to get onwire mutex lock");
 		goto out;
 	}
 	onwire_ver = knet_h->onwire_ver;
 	pthread_mutex_unlock(&knet_h->onwire_mutex);
 
 	savederrno = pthread_mutex_lock(&knet_h->tx_mutex);
 	if (savederrno) {
 		log_err(knet_h, KNET_SUB_TX, "Unable to get TX mutex lock: %s",
 			strerror(savederrno));
 		err = -1;
 		goto out;
 	}
 
 	if (knet_h->onwire_ver_remap) {
 		memmove(get_data_v1(knet_h, knet_h->recv_from_sock_buf), buff, buff_len);
 	} else {
 		switch (onwire_ver) {
 			case 1:
 				memmove(get_data_v1(knet_h, knet_h->recv_from_sock_buf), buff, buff_len);
 				break;
 			default:
 				log_warn(knet_h, KNET_SUB_TX, "preparing sync data onwire version %u not supported", onwire_ver);
 				goto out_tx;
 				break;
 		}
 	}
 
 	err = _parse_recv_from_sock(knet_h, buff_len, channel, onwire_ver, 1);
 	savederrno = errno;
 
 out_tx:
 	pthread_mutex_unlock(&knet_h->tx_mutex);
 out:
 	pthread_rwlock_unlock(&knet_h->global_rwlock);
 
 	errno = err ? savederrno : 0;
 	return err;
 }
 
 ssize_t knet_send(knet_handle_t knet_h, const char *buff, const size_t buff_len, const int8_t channel)
 {
 	int savederrno = 0;
 	ssize_t err = 0;
 	struct iovec iov_out[1];
 
 	if (!_is_valid_handle(knet_h)) {
 		return -1;
 	}
 
 	if (buff == NULL) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	if (buff_len <= 0) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	if (buff_len > KNET_MAX_PACKET_SIZE) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	if (channel < 0) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	if (channel >= KNET_DATAFD_MAX) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
 	if (savederrno) {
 		log_err(knet_h, KNET_SUB_HANDLE, "Unable to get read lock: %s",
 			strerror(savederrno));
 		errno = savederrno;
 		return -1;
 	}
 
 	if (!knet_h->sockfd[channel].in_use) {
 		savederrno = EINVAL;
 		err = -1;
 		goto out_unlock;
 	}
 
 	memset(iov_out, 0, sizeof(iov_out));
 
 	iov_out[0].iov_base = (void *)buff;
 	iov_out[0].iov_len = buff_len;
 
 	err = writev(knet_h->sockfd[channel].sockfd[0], iov_out, 1);
 	savederrno = errno;
 
 out_unlock:
 	pthread_rwlock_unlock(&knet_h->global_rwlock);
 	errno = err ? savederrno : 0;
 	return err;
 }
diff --git a/libknet/transport_sctp.c b/libknet/transport_sctp.c
index 0bd584ad..c27794de 100644
--- a/libknet/transport_sctp.c
+++ b/libknet/transport_sctp.c
@@ -1,1639 +1,1637 @@
 /*
  * Copyright (C) 2016-2023 Red Hat, Inc.  All rights reserved.
  *
  * Author: Christine Caulfield <ccaulfie@redhat.com>
  *
  * This software licensed under LGPL-2.0+
  */
 
 #include "config.h"
 
 #include <string.h>
 #include <unistd.h>
 #include <errno.h>
 #include <pthread.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <stdlib.h>
 #include <assert.h>
 
 #include "compat.h"
 #include "host.h"
 #include "links.h"
 #include "links_acl.h"
 #include "links_acl_ip.h"
 #include "logging.h"
 #include "netutils.h"
 #include "common.h"
 #include "transport_common.h"
 #include "transports.h"
 #include "threads_common.h"
 
 #ifdef HAVE_NETINET_SCTP_H
 #include <netinet/sctp.h>
 #include "transport_sctp.h"
 
 typedef struct sctp_handle_info {
 	struct qb_list_head listen_links_list;
 	struct qb_list_head connect_links_list;
 	int connect_epollfd;
 	int connectsockfd[2];
 	int listen_epollfd;
 	int listensockfd[2];
 	pthread_t connect_thread;
 	pthread_t listen_thread;
 	socklen_t event_subscribe_kernel_size;
 	char *event_subscribe_buffer;
 } sctp_handle_info_t;
 
 /*
  * use by fd_tracker data type
  */
 #define SCTP_NO_LINK_INFO       0
 #define SCTP_LISTENER_LINK_INFO 1
 #define SCTP_ACCEPTED_LINK_INFO 2
 #define SCTP_CONNECT_LINK_INFO  3
 
 /*
  * this value is per listener
  */
 #define MAX_ACCEPTED_SOCKS 256
 
 typedef struct sctp_listen_link_info {
 	struct qb_list_head list;
 	int listen_sock;
 	int accepted_socks[MAX_ACCEPTED_SOCKS];
 	struct sockaddr_storage src_address;
 	int on_listener_epoll;
 	int on_rx_epoll;
 	int sock_shutdown;
 } sctp_listen_link_info_t;
 
 typedef struct sctp_accepted_link_info {
 	char mread_buf[KNET_DATABUFSIZE];
 	ssize_t mread_len;
 	sctp_listen_link_info_t *link_info;
 } sctp_accepted_link_info_t ;
 
 typedef struct sctp_connect_link_info {
 	struct qb_list_head list;
 	sctp_listen_link_info_t *listener;
 	struct knet_link *link;
 	struct sockaddr_storage dst_address;
 	int connect_sock;
 	int on_rx_epoll;
 	int close_sock;
 	int sock_shutdown;
 } sctp_connect_link_info_t;
 
 /*
  * socket handling functions
  *
  * those functions do NOT perform locking. locking
  * should be handled in the right context from callers
  */
 
 /*
  * sockets are removed from rx_epoll from callers
  * see also error handling functions
  */
 static int _close_connect_socket(knet_handle_t knet_h, struct knet_link *kn_link)
 {
 	int err = 0, savederrno = 0;
 	struct epoll_event ev;
 	sctp_connect_link_info_t *info = kn_link->transport_link;
 
 	if (info->connect_sock != -1) {
 		if (info->on_rx_epoll) {
 			memset(&ev, 0, sizeof(struct epoll_event));
 			ev.events = EPOLLIN;
 			ev.data.fd = info->connect_sock;
 			if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_DEL, info->connect_sock, &ev)) {
 				savederrno = errno;
 				err = -1;
 				log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove connected socket from epoll pool: %s",
 				strerror(savederrno));
 				goto exit_error;
 			}
 			info->on_rx_epoll = 0;
 		}
 
 		if (_set_fd_tracker(knet_h, info->connect_sock, KNET_MAX_TRANSPORTS, SCTP_NO_LINK_INFO, 0, NULL) < 0) {
 			savederrno = errno;
 			err = -1;
 			log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set fd tracker: %s",
 				strerror(savederrno));
 		} else {
 			close(info->connect_sock);
 			info->connect_sock = -1;
 		}
 	}
 
 exit_error:
 	errno = savederrno;
 	return err;
 }
 
 static int _enable_sctp_notifications(knet_handle_t knet_h, int sock, const char *type)
 {
 	int err = 0, savederrno = 0;
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 
 	if (setsockopt(sock, IPPROTO_SCTP, SCTP_EVENTS,
 		       handle_info->event_subscribe_buffer,
 		       handle_info->event_subscribe_kernel_size) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to enable %s events: %s",
 			type, strerror(savederrno));
 	}
 
 	errno = savederrno;
 	return err;
 }
 
 static int _configure_sctp_socket(knet_handle_t knet_h, int sock, struct sockaddr_storage *address, uint64_t flags, const char *type)
 {
 	int err = 0, savederrno = 0;
 	int value;
 	int level;
 
 #ifdef SOL_SCTP
 	level = SOL_SCTP;
 #else
 	level = IPPROTO_SCTP;
 #endif
 
 	if (_configure_transport_socket(knet_h, sock, address, flags, type) < 0) {
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 
 	value = 1;
 	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &value, sizeof(value)) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set reuseaddr on socket %d: %s",
 			sock, strerror(savederrno));
 		goto exit_error;
 	}
 
 	value = 1;
 	if (setsockopt(sock, level, SCTP_NODELAY, &value, sizeof(value)) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set sctp nodelay: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	if (_enable_sctp_notifications(knet_h, sock, type) < 0) {
 		savederrno = errno;
 		err = -1;
 	}
 
 exit_error:
 	errno = savederrno;
 	return err;
 }
 
 static int _reconnect_socket(knet_handle_t knet_h, struct knet_link *kn_link)
 {
 	int err = 0, savederrno = 0;
 	sctp_connect_link_info_t *info = kn_link->transport_link;
 
 	if (connect(info->connect_sock, (struct sockaddr *)&kn_link->dst_addr, sockaddr_len(&kn_link->dst_addr)) < 0) {
 		savederrno = errno;
 		log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP socket %d received error: %s", info->connect_sock, strerror(savederrno));
 		if ((savederrno != EALREADY) && (savederrno != EINPROGRESS) && (savederrno != EISCONN)) {
 			err = -1;
 			log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to connect SCTP socket %d: %s",
 				info->connect_sock, strerror(savederrno));
 		}
 	}
 
 	errno = savederrno;
 	return err;
 }
 
 static int _create_connect_socket(knet_handle_t knet_h, struct knet_link *kn_link)
 {
 	int err = 0, savederrno = 0;
 	struct epoll_event ev;
 	sctp_connect_link_info_t *info = kn_link->transport_link;
 	int connect_sock;
 	struct sockaddr_storage connect_addr;
 
 	connect_sock = socket(kn_link->dst_addr.ss_family, SOCK_STREAM, IPPROTO_SCTP);
 	if (connect_sock < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to create send/recv socket: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	if (_configure_sctp_socket(knet_h, connect_sock, &kn_link->dst_addr, kn_link->flags, "SCTP connect") < 0) {
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 
 	memset(&connect_addr, 0, sizeof(struct sockaddr_storage));
 	if (knet_strtoaddr(kn_link->status.src_ipaddr, "0", &connect_addr, sockaddr_len(&connect_addr)) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to resolve connecting socket: %s",
 			strerror(savederrno));
 		goto exit_error;
 
 	}
 
 	if (bind(connect_sock, (struct sockaddr *)&connect_addr, sockaddr_len(&connect_addr)) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to bind connecting socket: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	if (_set_fd_tracker(knet_h, connect_sock, KNET_TRANSPORT_SCTP, SCTP_CONNECT_LINK_INFO, sockaddr_len(&kn_link->src_addr), info) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set fd tracker: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	memset(&ev, 0, sizeof(struct epoll_event));
 	ev.events = EPOLLIN;
 	ev.data.fd = connect_sock;
 	if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_ADD, connect_sock, &ev)) {
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to add connected socket to epoll pool: %s",
 			strerror(errno));
 	}
 	info->on_rx_epoll = 1;
 
 	info->connect_sock = connect_sock;
 	info->close_sock = 0;
 	kn_link->outsock = info->connect_sock;
 
 	if (_reconnect_socket(knet_h, kn_link) < 0) {
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 
 exit_error:
 	if (err) {
 		if (connect_sock >= 0) {
 			close(connect_sock);
 		}
 	}
 	errno = savederrno;
 	return err;
 }
 
 static void _lock_sleep_relock(knet_handle_t knet_h)
 {
 	int i = 0;
 
 	/* Don't hold onto the lock while sleeping */
 	pthread_rwlock_unlock(&knet_h->global_rwlock);
 
 	while (i < 5) {
 		usleep(knet_h->threads_timer_res / 16);
 		if (!pthread_rwlock_rdlock(&knet_h->global_rwlock)) {
 			/*
 			 * lock acquired, we can go out
 			 */
 			return;
 		} else {
 			log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to get read lock!");
 			i++;
 		}
 	}
 	/*
 	 * time to crash! if we cannot re-acquire the lock
 	 * there is no easy way out of this one
 	 */
 	assert(0);
 }
 
 transport_sock_error_t sctp_transport_tx_sock_error(knet_handle_t knet_h, int sockfd, int subsys, int recv_err, int recv_errno)
 {
 	sctp_connect_link_info_t *connect_info = knet_h->knet_transport_fd_tracker[sockfd].data;
 	sctp_accepted_link_info_t *accepted_info = knet_h->knet_transport_fd_tracker[sockfd].data;
 	sctp_listen_link_info_t *listen_info;
 
 	if (recv_err < 0) {
 		switch (knet_h->knet_transport_fd_tracker[sockfd].data_type) {
 			case SCTP_CONNECT_LINK_INFO:
 				if (connect_info->link->transport_connected == 0) {
 					return KNET_TRANSPORT_SOCK_ERROR_INTERNAL;
 				}
 				break;
 			case SCTP_ACCEPTED_LINK_INFO:
 				listen_info = accepted_info->link_info;
 				if (listen_info->listen_sock != sockfd) {
 					if (listen_info->on_rx_epoll == 0) {
 						return KNET_TRANSPORT_SOCK_ERROR_INTERNAL;
 					}
 				}
 				break;
 		}
 		if (recv_errno == EAGAIN) {
-#ifdef DEBUG
-			log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Sock: %d is overloaded. Slowing TX down", sockfd);
-#endif
+			log_trace(knet_h, KNET_SUB_TRANSP_SCTP, "Sock: %d is overloaded. Slowing TX down", sockfd);
 			_lock_sleep_relock(knet_h);
 			return KNET_TRANSPORT_SOCK_ERROR_RETRY;
 		}
 		return KNET_TRANSPORT_SOCK_ERROR_INTERNAL;
 	}
 	return KNET_TRANSPORT_SOCK_ERROR_IGNORE;
 }
 
 /*
  * socket error management functions
  *
  * both called with global read lock.
  *
  * NOTE: we need to remove the fd from the epoll as soon as possible
  *       even before we notify the respective thread to take care of it
  *       because scheduling can make it so that this thread will overload
  *       and the threads supposed to take care of the error will never
  *       be able to take action.
  *       we CANNOT handle FDs here directly (close/reconnect/etc) due
  *       to locking context. We need to delegate that to their respective
  *       management threads within the global write lock.
  *
  * this function is called from:
  * - RX thread with recv_err <= 0 directly on recvmmsg error
  * - transport_rx_is_data when msg_len == 0 (recv_err = 1)
  * - transport_rx_is_data on notification (recv_err = 2)
  *
  * basically this small abuse of recv_err is to detect notifications
  * generated by sockets created by listen().
  */
 transport_sock_error_t sctp_transport_rx_sock_error(knet_handle_t knet_h, int sockfd, int recv_err, int recv_errno)
 {
 	struct epoll_event ev;
 	sctp_accepted_link_info_t *accepted_info = knet_h->knet_transport_fd_tracker[sockfd].data;
 	sctp_listen_link_info_t *listen_info;
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 
 	switch (knet_h->knet_transport_fd_tracker[sockfd].data_type) {
 		case SCTP_CONNECT_LINK_INFO:
 			/*
 			 * all connect link have notifications enabled
 			 * and we accept only data from notification and
 			 * generic recvmmsg errors.
 			 *
 			 * Errors generated by msg_len 0 can be ignored because
 			 * they follow a notification (double notification)
 			 */
 			if (recv_err != 1) {
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Notifying connect thread that sockfd %d received an error", sockfd);
 				if (sendto(handle_info->connectsockfd[1], &sockfd, sizeof(int), MSG_DONTWAIT | MSG_NOSIGNAL, NULL, 0) != sizeof(int)) {
 					log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to notify connect thread: %s", strerror(errno));
 				}
 			}
 			break;
 		case SCTP_ACCEPTED_LINK_INFO:
 			listen_info = accepted_info->link_info;
 			if (listen_info->listen_sock != sockfd) {
 				if (recv_err != 1) {
 					if (listen_info->on_rx_epoll) {
 						memset(&ev, 0, sizeof(struct epoll_event));
 						ev.events = EPOLLIN;
 						ev.data.fd = sockfd;
 						if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_DEL, sockfd, &ev)) {
 							log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove EOFed socket from epoll pool: %s",
 							strerror(errno));
 							return -1;
 						}
 						listen_info->on_rx_epoll = 0;
 					}
 					log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Notifying listen thread that sockfd %d received an error", sockfd);
 					if (sendto(handle_info->listensockfd[1], &sockfd, sizeof(int), MSG_DONTWAIT | MSG_NOSIGNAL, NULL, 0) != sizeof(int)) {
 						log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to notify listen thread: %s", strerror(errno));
 					}
 				}
 			} else {
 				/*
 				 * this means the listen() socket has generated
 				 * a notification. now what? :-)
 				 */
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received stray notification for listen() socket %d", sockfd);
 			}
 			break;
 		default:
 			log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received unknown notification? %d", sockfd);
 			break;
 	}
 	/*
 	 * Under RX pressure we need to give time to IPC to pick up the message
 	 */
 
 	_lock_sleep_relock(knet_h);
 	return 0;
 }
 
 /*
  * NOTE: sctp_transport_rx_is_data is called with global rdlock
  *       delegate any FD error management to sctp_transport_rx_sock_error
  *       and keep this code to parsing incoming data only
  */
 transport_rx_isdata_t sctp_transport_rx_is_data(knet_handle_t knet_h, int sockfd, struct knet_mmsghdr *msg)
 {
 	size_t i;
 	struct iovec *iov = msg->msg_hdr.msg_iov;
 	size_t iovlen = msg->msg_hdr.msg_iovlen;
 	struct sctp_assoc_change *sac;
 	union sctp_notification  *snp;
 	sctp_accepted_link_info_t *listen_info = knet_h->knet_transport_fd_tracker[sockfd].data;
 	sctp_connect_link_info_t *connect_info = knet_h->knet_transport_fd_tracker[sockfd].data;
 
 	if (!(msg->msg_hdr.msg_flags & MSG_NOTIFICATION)) {
 		if (msg->msg_len == 0) {
 			/*
 			 * NOTE: with event notification enabled, we receive error twice:
 			 *       1) from the event notification
 			 *       2) followed by a 0 byte msg_len
 			 *
 			 * the event handler should take care to avoid #2 by stopping
 			 * the rx thread from processing more packets than necessary.
 			 */
 			if (knet_h->knet_transport_fd_tracker[sockfd].data_type == SCTP_CONNECT_LINK_INFO) {
 				if (connect_info->sock_shutdown) {
 					return KNET_TRANSPORT_RX_OOB_DATA_CONTINUE;
 				}
 			} else {
 				if (listen_info->link_info->sock_shutdown) {
 					return KNET_TRANSPORT_RX_OOB_DATA_CONTINUE;
 				}
 			}
 			/*
 			 * this is pretty much dead code and we should never hit it.
 			 * keep it for safety and avoid the rx thread to process
 			 * bad info / data.
 			 */
 			return KNET_TRANSPORT_RX_NOT_DATA_STOP;
 		}
 		/*
 		 * missing MSG_EOR has to be treated as a short read
 		 * from the socket and we need to fill in the mread buf
 		 * while we wait for MSG_EOR
 		 */
 		if (!(msg->msg_hdr.msg_flags & MSG_EOR)) {
 			/*
 			 * copy the incoming data into mread_buf + mread_len (incremental)
 			 * and increase mread_len
 			 */
 			memmove(listen_info->mread_buf + listen_info->mread_len, iov->iov_base, msg->msg_len);
 			listen_info->mread_len = listen_info->mread_len + msg->msg_len;
 			return KNET_TRANSPORT_RX_NOT_DATA_CONTINUE;
 		}
 		/*
 		 * got EOR.
 		 * if mread_len is > 0 we are completing a packet from short reads
 		 * complete reassembling the packet in mread_buf, copy it back in the iov
 		 * and set the iov/msg len numbers (size) correctly
 		 */
 		if (listen_info->mread_len) {
 			/*
 			 * add last fragment to mread_buf
 			 */
 			memmove(listen_info->mread_buf + listen_info->mread_len, iov->iov_base, msg->msg_len);
 			listen_info->mread_len = listen_info->mread_len + msg->msg_len;
 			/*
 			 * move all back into the iovec
 			 */
 			memmove(iov->iov_base, listen_info->mread_buf, listen_info->mread_len);
 			msg->msg_len = listen_info->mread_len;
 			listen_info->mread_len = 0;
 		}
 		return KNET_TRANSPORT_RX_IS_DATA;
 	}
 
 	if (!(msg->msg_hdr.msg_flags & MSG_EOR)) {
 		return KNET_TRANSPORT_RX_NOT_DATA_STOP;
 	}
 
 	for (i = 0; i < iovlen; i++) {
 		snp = iov[i].iov_base;
 
 		switch (snp->sn_header.sn_type) {
 			case SCTP_ASSOC_CHANGE:
 				sac = &snp->sn_assoc_change;
 				switch (sac->sac_state) {
 					case SCTP_COMM_LOST:
 						log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp assoc change socket %d: comm_lost", sockfd);
 						if (knet_h->knet_transport_fd_tracker[sockfd].data_type == SCTP_CONNECT_LINK_INFO) {
 							connect_info->close_sock = 1;
 							connect_info->link->transport_connected = 0;
 						}
 						sctp_transport_rx_sock_error(knet_h, sockfd, 2, 0);
 						return KNET_TRANSPORT_RX_OOB_DATA_STOP;
 						break;
 					case SCTP_COMM_UP:
 						log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp assoc change socket %d: comm_up", sockfd);
 						if (knet_h->knet_transport_fd_tracker[sockfd].data_type == SCTP_CONNECT_LINK_INFO) {
 							connect_info->link->transport_connected = 1;
 						}
 						break;
 					case SCTP_RESTART:
 						log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp assoc change socket %d: restart", sockfd);
 						break;
 					case SCTP_SHUTDOWN_COMP:
 						log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp assoc change socket %d: shutdown comp", sockfd);
 						if (knet_h->knet_transport_fd_tracker[sockfd].data_type == SCTP_CONNECT_LINK_INFO) {
 							connect_info->close_sock = 1;
 						}
 						sctp_transport_rx_sock_error(knet_h, sockfd, 2, 0);
 						return KNET_TRANSPORT_RX_OOB_DATA_STOP;
 						break;
 					case SCTP_CANT_STR_ASSOC:
 						log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp assoc change socket %d: cant str assoc", sockfd);
 						sctp_transport_rx_sock_error(knet_h, sockfd, 2, 0);
 						break;
 					default:
 						log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp assoc change socket %d: unknown %d", sockfd, sac->sac_state);
 						break;
 				}
 				break;
 			case SCTP_SHUTDOWN_EVENT:
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp shutdown event socket %d", sockfd);
 				if (knet_h->knet_transport_fd_tracker[sockfd].data_type == SCTP_CONNECT_LINK_INFO) {
 					connect_info->link->transport_connected = 0;
 					connect_info->sock_shutdown = 1;
 				} else {
 					listen_info->link_info->sock_shutdown = 1;
 				}
 				break;
 			case SCTP_SEND_FAILED:
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp send failed socket: %d", sockfd);
 				break;
 			case SCTP_PEER_ADDR_CHANGE:
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp peer addr change socket %d", sockfd);
 				break;
 			case SCTP_REMOTE_ERROR:
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp remote error socket %d", sockfd);
 				break;
 			default:
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] unknown sctp event socket: %d type: %hu", sockfd, snp->sn_header.sn_type);
 				break;
 		}
 	}
 	return KNET_TRANSPORT_RX_OOB_DATA_CONTINUE;
 }
 
 int sctp_transport_link_is_down(knet_handle_t knet_h, struct knet_link *kn_link)
 {
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 	sctp_connect_link_info_t *info = kn_link->transport_link;
 
 	kn_link->transport_connected = 0;
 	info->close_sock = 1;
 
 	log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Notifying connect thread that sockfd %d received a link down event", info->connect_sock);
 	if (sendto(handle_info->connectsockfd[1], &info->connect_sock, sizeof(int), MSG_DONTWAIT | MSG_NOSIGNAL, NULL, 0) != sizeof(int)) {
 		log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to notify connect thread: %s", strerror(errno));
 	}
 
 	return 0;
 }
 
 /*
  * connect / outgoing socket management thread
  */
 
 /*
  * _handle_connected_sctp* are called with a global write lock
  * from the connect_thread
  */
 static void _handle_connected_sctp_socket(knet_handle_t knet_h, int connect_sock)
 {
 	int err;
 	unsigned int status, len = sizeof(status);
 	sctp_connect_link_info_t *info = knet_h->knet_transport_fd_tracker[connect_sock].data;
 	struct knet_link *kn_link = info->link;
 
 	if (info->close_sock) {
 		if (_close_connect_socket(knet_h, kn_link) < 0) {
 			log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to close sock %d from _handle_connected_sctp_socket: %s", connect_sock, strerror(errno));
 			return;
 		}
 		info->close_sock = 0;
 		if (_create_connect_socket(knet_h, kn_link) < 0) {
 			log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to recreate connecting sock! %s", strerror(errno));
 			return;
 		}
 	}
 
 	_reconnect_socket(knet_h, info->link);
 
 	err = getsockopt(connect_sock, SOL_SOCKET, SO_ERROR, &status, &len);
 	if (err) {
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP getsockopt() on connecting socket %d failed: %s",
 			connect_sock, strerror(errno));
 		return;
 	}
 
 	if (status) {
 		log_info(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP connect on %d to %s port %s failed: %s",
 			 connect_sock, kn_link->status.dst_ipaddr, kn_link->status.dst_port,
 			 strerror(status));
 
 		/*
 		 * No need to create a new socket if connect failed,
 		 * just retry connect
 		 */
 		return;
 	}
 
 	log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP handler fd %d now connected to %s port %s",
 		  connect_sock,
 		  kn_link->status.dst_ipaddr, kn_link->status.dst_port);
 }
 
 static void _handle_connected_sctp_notifications(knet_handle_t knet_h)
 {
 	int sockfd = -1;
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 
 	if (recv(handle_info->connectsockfd[0], &sockfd, sizeof(int), MSG_DONTWAIT | MSG_NOSIGNAL) != sizeof(int)) {
 		log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Short read on connectsockfd");
 		return;
 	}
 
 	if (_is_valid_fd(knet_h, sockfd) < 1) {
 		log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received stray notification for connected socket fd error");
 		return;
 	}
 
 	/*
 	 * revalidate sockfd
 	 */
 	if ((sockfd < 0) || (sockfd >= KNET_MAX_FDS)) {
 		return;
 	}
 
 	log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Processing connected error on socket: %d", sockfd);
 
 	_handle_connected_sctp_socket(knet_h, sockfd);
 }
 
 static void *_sctp_connect_thread(void *data)
 {
 	int savederrno;
 	int i, nev;
 	knet_handle_t knet_h = (knet_handle_t) data;
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 	struct epoll_event events[KNET_EPOLL_MAX_EVENTS];
 
 	set_thread_status(knet_h, KNET_THREAD_SCTP_CONN, KNET_THREAD_STARTED);
 
 	memset(&events, 0, sizeof(events));
 
 	while (!shutdown_in_progress(knet_h)) {
 		nev = epoll_wait(handle_info->connect_epollfd, events, KNET_EPOLL_MAX_EVENTS, knet_h->threads_timer_res / 1000);
 
 		/*
 		 * we use timeout to detect if thread is shutting down
 		 */
 		if (nev == 0) {
 			continue;
 		}
 
 		if (nev < 0) {
 			log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP connect handler EPOLL ERROR: %s",
 				  strerror(errno));
 			continue;
 		}
 
 		/*
 		 * Sort out which FD has a connection
 		 */
 		savederrno = get_global_wrlock(knet_h);
 		if (savederrno) {
 			log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to get write lock: %s",
 				strerror(savederrno));
 			continue;
 		}
 
 		/*
 		 * minor optimization: deduplicate events
 		 *
 		 * in some cases we can receive multiple notifcations
 		 * of the same FD having issues or need handling.
 		 * It's enough to process it once even tho it's safe
 		 * to handle them multiple times.
 		 */
 		for (i = 0; i < nev; i++) {
 			if (events[i].data.fd == handle_info->connectsockfd[0]) {
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received notification from rx_error for connected socket");
 				_handle_connected_sctp_notifications(knet_h);
 			} else {
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received stray notification on connected sockfd %d\n", events[i].data.fd);
 			}
 		}
 		pthread_rwlock_unlock(&knet_h->global_rwlock);
 		/*
 		 * this thread can generate events for itself.
 		 * we need to sleep in between loops to allow other threads
 		 * to be scheduled
 		 */
 		usleep(knet_h->reconnect_int * 1000);
 	}
 
 	set_thread_status(knet_h, KNET_THREAD_SCTP_CONN, KNET_THREAD_STOPPED);
 
 	return NULL;
 }
 
 /*
  * listen/incoming connections management thread
  */
 
 /*
  * Listener received a new connection
  * called with a write lock from main thread
  */
 static void _handle_incoming_sctp(knet_handle_t knet_h, int listen_sock)
 {
 	int err = 0, savederrno = 0;
 	int new_fd;
 	int i = -1;
 	sctp_listen_link_info_t *info = knet_h->knet_transport_fd_tracker[listen_sock].data;
 	struct epoll_event ev;
 	struct sockaddr_storage ss;
 	socklen_t sock_len = sizeof(ss);
 	char addr_str[KNET_MAX_HOST_LEN];
 	char port_str[KNET_MAX_PORT_LEN];
 	sctp_accepted_link_info_t *accept_info = NULL;
 	struct knet_host *host;
 	struct knet_link *kn_link;
 	int link_idx;
 	sctp_connect_link_info_t *this_link_connect_info;
 	sctp_listen_link_info_t *this_link_listen_info;
 	int pass_acl = 0;
 
 	memset(&ss, 0, sizeof(ss));
 
 	new_fd = accept(listen_sock, (struct sockaddr *)&ss, &sock_len);
 	if (new_fd < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Incoming: accept error: %s", strerror(errno));
 		goto exit_error;
 	}
 
 	if (knet_addrtostr(&ss, sizeof(ss),
 			   addr_str, KNET_MAX_HOST_LEN,
 			   port_str, KNET_MAX_PORT_LEN) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Incoming: unable to gather socket info");
 		goto exit_error;
 	}
 
 	log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Incoming: received connection from: %s port: %s",
 						addr_str, port_str);
 
 	if (knet_h->use_access_lists) {
 		for (host = knet_h->host_head; host != NULL; host = host->next) {
 			for (link_idx = 0; link_idx < KNET_MAX_LINK; link_idx++) {
 				kn_link = &host->link[link_idx];
 
 				if ((kn_link->configured) && (kn_link->transport == KNET_TRANSPORT_SCTP)) {
 					this_link_connect_info = kn_link->transport_link;
 					this_link_listen_info = this_link_connect_info->listener;
 					if ((this_link_listen_info->listen_sock == listen_sock) &&
 					    (check_validate(knet_h, kn_link, &ss))) {
 						pass_acl = 1;
 						break;
 					}
 				}
 			}
 			if (pass_acl) {
 				break;
 			}
 		}
 		if (!pass_acl) {
 			savederrno = EINVAL;
 			log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Connection rejected from %s/%s", addr_str, port_str);
 			close(new_fd);
 			errno = savederrno;
 			return;
 		}
 	}
 
 	/*
 	 * Keep a track of all accepted FDs
 	 */
 	for (i=0; i<MAX_ACCEPTED_SOCKS; i++) {
 		if (info->accepted_socks[i] == -1) {
 			info->accepted_socks[i] = new_fd;
 			break;
 		}
 	}
 
 	if (i == MAX_ACCEPTED_SOCKS) {
 		errno = EBUSY;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Incoming: too many connections!");
 		goto exit_error;
 	}
 
 	if (_configure_common_socket(knet_h, new_fd, 0, "SCTP incoming") < 0) { /* Inherit flags from listener? */
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 
 	if (_enable_sctp_notifications(knet_h, new_fd, "Incoming connection") < 0) {
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 
 	accept_info = malloc(sizeof(sctp_accepted_link_info_t));
 	if (!accept_info) {
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 	memset(accept_info, 0, sizeof(sctp_accepted_link_info_t));
 
 	accept_info->link_info = info;
 
 	if (_set_fd_tracker(knet_h, new_fd, KNET_TRANSPORT_SCTP, SCTP_ACCEPTED_LINK_INFO,
 			    knet_h->knet_transport_fd_tracker[listen_sock].sockaddr_len,
 			    accept_info) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set fd tracker: %s",
 			strerror(errno));
 		goto exit_error;
 	}
 
 	memset(&ev, 0, sizeof(struct epoll_event));
 	ev.events = EPOLLIN;
 	ev.data.fd = new_fd;
 	if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_ADD, new_fd, &ev)) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Incoming: unable to add accepted socket %d to epoll pool: %s",
 			new_fd, strerror(errno));
 		goto exit_error;
 	}
 	info->on_rx_epoll = 1;
 
 	log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Incoming: accepted new fd %d for %s/%s (listen fd: %d). index: %d",
 		  new_fd, addr_str, port_str, info->listen_sock, i);
 
 exit_error:
 	if (err) {
 		if ((i >= 0) && (i < MAX_ACCEPTED_SOCKS)) {
 			info->accepted_socks[i] = -1;
 		}
 		/*
 		 * check the error to make coverity scan happy.
 		 * _set_fd_tracker cannot fail at this stage
 		 */
 		if (_set_fd_tracker(knet_h, new_fd, KNET_MAX_TRANSPORTS, SCTP_NO_LINK_INFO, 0, NULL) < 0){
 			log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to update fdtracker for socket %d", new_fd);
 		}
 		free(accept_info);
 		if (new_fd >= 0) {
 			close(new_fd);
 		}
 	}
 	errno = savederrno;
 	return;
 }
 
 /*
  * Listen thread received a notification of a bad socket that needs closing
  * called with a write lock from main thread
  */
 static void _handle_listen_sctp_errors(knet_handle_t knet_h)
 {
 	int sockfd = -1;
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 	sctp_accepted_link_info_t *accept_info;
 	sctp_listen_link_info_t *info;
 	struct knet_host *host;
 	int link_idx;
 	int i;
 
 	if (recv(handle_info->listensockfd[0], &sockfd, sizeof(int), MSG_DONTWAIT | MSG_NOSIGNAL) != sizeof(int)) {
 		log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Short read on listensockfd");
 		return;
 	}
 
 	if (_is_valid_fd(knet_h, sockfd) < 1) {
 		log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received stray notification for listen socket fd error");
 		return;
 	}
 
 	/*
 	 * revalidate sockfd
 	 */
 	if ((sockfd < 0) || (sockfd >= KNET_MAX_FDS)) {
 		return;
 	}
 
 	log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Processing listen error on socket: %d", sockfd);
 
 	accept_info = knet_h->knet_transport_fd_tracker[sockfd].data;
 	info = accept_info->link_info;
 
 	/*
 	 * clear all links using this accepted socket as
 	 * outbound dynamically connected socket
 	 */
 
 	for (host = knet_h->host_head; host != NULL; host = host->next) {
 		for (link_idx = 0; link_idx < KNET_MAX_LINK; link_idx++) {
 			if ((host->link[link_idx].dynamic == KNET_LINK_DYNIP) &&
 			    (host->link[link_idx].outsock == sockfd)) {
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Found dynamic connection on host %d link %d (%d)",
 					  host->host_id, link_idx, sockfd);
 				host->link[link_idx].status.dynconnected = 0;
 				host->link[link_idx].transport_connected = 0;
 				host->link[link_idx].outsock = 0;
 				memset(&host->link[link_idx].dst_addr, 0, sizeof(struct sockaddr_storage));
 			}
 		}
 	}
 
 	for (i=0; i<MAX_ACCEPTED_SOCKS; i++) {
 		if (sockfd == info->accepted_socks[i]) {
 			log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Closing accepted socket %d", sockfd);
 			/*
 			 * check the error to make coverity scan happy.
 			 * _set_fd_tracker cannot fail at this stage
 			 */
 			if (_set_fd_tracker(knet_h, sockfd, KNET_MAX_TRANSPORTS, SCTP_NO_LINK_INFO, 0, NULL) < 0) {
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to update fdtracker for socket %d", sockfd);
 			}
 			info->accepted_socks[i] = -1;
 			free(accept_info);
 			close(sockfd);
 			break; /* Keeps covscan happy */
 		}
 	}
 }
 
 static void *_sctp_listen_thread(void *data)
 {
 	int savederrno;
 	int i, nev;
 	knet_handle_t knet_h = (knet_handle_t) data;
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 	struct epoll_event events[KNET_EPOLL_MAX_EVENTS];
 
 	set_thread_status(knet_h, KNET_THREAD_SCTP_LISTEN, KNET_THREAD_STARTED);
 
 	memset(&events, 0, sizeof(events));
 
 	while (!shutdown_in_progress(knet_h)) {
 		nev = epoll_wait(handle_info->listen_epollfd, events, KNET_EPOLL_MAX_EVENTS, knet_h->threads_timer_res / 1000);
 
 		/*
 		 * we use timeout to detect if thread is shutting down
 		 */
 		if (nev == 0) {
 			continue;
 		}
 
 		if (nev < 0) {
 			log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP listen handler EPOLL ERROR: %s",
 				  strerror(errno));
 			continue;
 		}
 
 		savederrno = get_global_wrlock(knet_h);
 		if (savederrno) {
 			log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to get write lock: %s",
 				strerror(savederrno));
 			continue;
 		}
 		/*
 		 * Sort out which FD has an incoming connection
 		 */
 		for (i = 0; i < nev; i++) {
 			if (events[i].data.fd == handle_info->listensockfd[0]) {
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received notification from rx_error for listener/accepted socket");
 				_handle_listen_sctp_errors(knet_h);
 			} else {
 				if (_is_valid_fd(knet_h, events[i].data.fd) == 1) {
 					_handle_incoming_sctp(knet_h, events[i].data.fd);
 				} else {
 					log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received listen notification from invalid socket");
 				}
 			}
 
 		}
 		pthread_rwlock_unlock(&knet_h->global_rwlock);
 	}
 
 	set_thread_status(knet_h, KNET_THREAD_SCTP_LISTEN, KNET_THREAD_STOPPED);
 
 	return NULL;
 }
 
 /*
  * sctp_link_listener_start/stop are called in global write lock
  * context from set_config and clear_config.
  */
 static sctp_listen_link_info_t *sctp_link_listener_start(knet_handle_t knet_h, struct knet_link *kn_link)
 {
 	int err = 0, savederrno = 0;
 	int listen_sock = -1;
 	struct epoll_event ev;
 	sctp_listen_link_info_t *info = NULL;
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 
 	/*
 	 * Only allocate a new listener if src address is different
 	 */
 	qb_list_for_each_entry(info, &handle_info->listen_links_list, list) {
 		if (memcmp(&info->src_address, &kn_link->src_addr, sizeof(struct sockaddr_storage)) == 0) {
 			if ((check_add(knet_h, kn_link, -1,
 				       &kn_link->dst_addr, &kn_link->dst_addr, CHECK_TYPE_ADDRESS, CHECK_ACCEPT) < 0) && (errno != EEXIST)) {
 				return NULL;
 			}
 			return info;
 		}
 	}
 
 	info = malloc(sizeof(sctp_listen_link_info_t));
 	if (!info) {
 		err = -1;
 		goto exit_error;
 	}
 
 	memset(info, 0, sizeof(sctp_listen_link_info_t));
 
 	memset(info->accepted_socks, -1, sizeof(info->accepted_socks));
 	memmove(&info->src_address, &kn_link->src_addr, sizeof(struct sockaddr_storage));
 
 	listen_sock = socket(kn_link->src_addr.ss_family, SOCK_STREAM, IPPROTO_SCTP);
 	if (listen_sock < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to create listener socket: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	if (_configure_sctp_socket(knet_h, listen_sock, &kn_link->src_addr, kn_link->flags, "SCTP listener") < 0) {
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 
 	if (bind(listen_sock, (struct sockaddr *)&kn_link->src_addr, sockaddr_len(&kn_link->src_addr)) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to bind listener socket: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	if (listen(listen_sock, 5) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to listen on listener socket: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	if (_set_fd_tracker(knet_h, listen_sock, KNET_TRANSPORT_SCTP, SCTP_LISTENER_LINK_INFO, sockaddr_len(&kn_link->src_addr), info) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set fd tracker: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	if ((check_add(knet_h, kn_link, -1,
 		       &kn_link->dst_addr, &kn_link->dst_addr, CHECK_TYPE_ADDRESS, CHECK_ACCEPT) < 0) && (errno != EEXIST)) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to configure default access lists: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	memset(&ev, 0, sizeof(struct epoll_event));
 	ev.events = EPOLLIN;
 	ev.data.fd = listen_sock;
 	if (epoll_ctl(handle_info->listen_epollfd, EPOLL_CTL_ADD, listen_sock, &ev)) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to add listener to epoll pool: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 	info->on_listener_epoll = 1;
 
 	info->listen_sock = listen_sock;
 	qb_list_add(&info->list, &handle_info->listen_links_list);
 
 	log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Listening on fd %d for %s:%s", listen_sock, kn_link->status.src_ipaddr, kn_link->status.src_port);
 
 exit_error:
 	if (err) {
 		if ((info) && (info->on_listener_epoll)) {
 			epoll_ctl(handle_info->listen_epollfd, EPOLL_CTL_DEL, listen_sock, &ev);
 		}
 		if (listen_sock >= 0) {
 			check_rmall(knet_h, kn_link);
 			close(listen_sock);
 		}
 		if (info) {
 			free(info);
 			info = NULL;
 		}
 	}
 	errno = savederrno;
 	return info;
 }
 
 static int sctp_link_listener_stop(knet_handle_t knet_h, struct knet_link *kn_link)
 {
 	int err = 0, savederrno = 0;
 	int found = 0, i;
 	struct knet_host *host;
 	int link_idx;
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 	sctp_connect_link_info_t *this_link_info = kn_link->transport_link;
 	sctp_listen_link_info_t *info = this_link_info->listener;
 	sctp_connect_link_info_t *link_info;
 	struct epoll_event ev;
 
 	for (host = knet_h->host_head; host != NULL; host = host->next) {
 		for (link_idx = 0; link_idx < KNET_MAX_LINK; link_idx++) {
 			if (&host->link[link_idx] == kn_link)
 				continue;
 
 			link_info = host->link[link_idx].transport_link;
 			if ((link_info) &&
 			    (link_info->listener == info)) {
 				found = 1;
 				break;
 			}
 		}
 	}
 
 	if ((check_rm(knet_h, kn_link,
 		      &kn_link->dst_addr, &kn_link->dst_addr, CHECK_TYPE_ADDRESS, CHECK_ACCEPT) < 0) && (errno != ENOENT)) {
 		log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove default access lists for %d", info->listen_sock);
 	}
 
 	if (found) {
 		this_link_info->listener = NULL;
 		log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP listener socket %d still in use", info->listen_sock);
 		savederrno = EBUSY;
 		err = -1;
 		goto exit_error;
 	}
 
 	if (info->on_listener_epoll) {
 		memset(&ev, 0, sizeof(struct epoll_event));
 		ev.events = EPOLLIN;
 		ev.data.fd = info->listen_sock;
 		if (epoll_ctl(handle_info->listen_epollfd, EPOLL_CTL_DEL, info->listen_sock, &ev)) {
 			savederrno = errno;
 			err = -1;
 			log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove listener to epoll pool: %s",
 				strerror(savederrno));
 			goto exit_error;
 		}
 		info->on_listener_epoll = 0;
 	}
 
 	if (_set_fd_tracker(knet_h, info->listen_sock, KNET_MAX_TRANSPORTS, SCTP_NO_LINK_INFO, 0, NULL) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set fd tracker: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	check_rmall(knet_h, kn_link);
 	close(info->listen_sock);
 
 	for (i=0; i< MAX_ACCEPTED_SOCKS; i++) {
 		if (info->accepted_socks[i] > -1) {
 			memset(&ev, 0, sizeof(struct epoll_event));
 			ev.events = EPOLLIN;
 			ev.data.fd = info->accepted_socks[i];
 			if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_DEL, info->accepted_socks[i], &ev)) {
 				log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove EOFed socket from epoll pool: %s",
 					strerror(errno));
 			}
 			info->on_rx_epoll = 0;
 			free(knet_h->knet_transport_fd_tracker[info->accepted_socks[i]].data);
 			close(info->accepted_socks[i]);
 			if (_set_fd_tracker(knet_h, info->accepted_socks[i], KNET_MAX_TRANSPORTS, SCTP_NO_LINK_INFO, 0, NULL) < 0) {
 				savederrno = errno;
 				err = -1;
 				log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set fd tracker: %s",
 					strerror(savederrno));
 				goto exit_error;
 			}
 			info->accepted_socks[i] = -1;
 		}
 	}
 
 	qb_list_del(&info->list);
 	free(info);
 	this_link_info->listener = NULL;
 
 exit_error:
 	errno = savederrno;
 	return err;
 }
 
 /*
  * Links config/clear. Both called with global wrlock from link_set_config/clear_config
  */
 int sctp_transport_link_set_config(knet_handle_t knet_h, struct knet_link *kn_link)
 {
 	int savederrno = 0, err = 0;
 	sctp_connect_link_info_t *info;
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 
 	info = malloc(sizeof(sctp_connect_link_info_t));
 	if (!info) {
 		goto exit_error;
 	}
 
 	memset(info, 0, sizeof(sctp_connect_link_info_t));
 
 	kn_link->transport_link = info;
 	info->link = kn_link;
 
 	memmove(&info->dst_address, &kn_link->dst_addr, sizeof(struct sockaddr_storage));
 	info->connect_sock = -1;
 
 	info->listener = sctp_link_listener_start(knet_h, kn_link);
 	if (!info->listener) {
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 
 	if (kn_link->dynamic == KNET_LINK_STATIC) {
 		if (_create_connect_socket(knet_h, kn_link) < 0) {
 			savederrno = errno;
 			err = -1;
 			goto exit_error;
 		}
 		kn_link->outsock = info->connect_sock;
 	}
 
 	qb_list_add(&info->list, &handle_info->connect_links_list);
 
 exit_error:
 	if (err) {
 		if (info) {
 			if (info->connect_sock >= 0) {
 				close(info->connect_sock);
 			}
 			if (info->listener) {
 				sctp_link_listener_stop(knet_h, kn_link);
 			}
 			kn_link->transport_link = NULL;
 			free(info);
 		}
 	}
 	errno = savederrno;
 	return err;
 }
 
 /*
  * called with global wrlock
  */
 int sctp_transport_link_clear_config(knet_handle_t knet_h, struct knet_link *kn_link)
 {
 	int err = 0, savederrno = 0;
 	sctp_connect_link_info_t *info;
 
 	if (!kn_link) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	info = kn_link->transport_link;
 
 	if (!info) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	if ((sctp_link_listener_stop(knet_h, kn_link) <0) && (errno != EBUSY)) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove listener transport: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	if (_close_connect_socket(knet_h, kn_link) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to close connected socket: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	qb_list_del(&info->list);
 
 	free(info);
 	kn_link->transport_link = NULL;
 
 exit_error:
 	errno = savederrno;
 	return err;
 }
 
 /*
  * transport_free and transport_init are
  * called only from knet_handle_new and knet_handle_free.
  * all resources (hosts/links) should have been already freed at this point
  * and they are called in a write locked context, hence they
  * don't need their own locking.
  */
 
 int sctp_transport_free(knet_handle_t knet_h)
 {
 	sctp_handle_info_t *handle_info;
 	void *thread_status;
 	struct epoll_event ev;
 
 	if (!knet_h->transports[KNET_TRANSPORT_SCTP]) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 
 	/*
 	 * keep it here while we debug list usage and such
 	 */
 	if (!qb_list_empty(&handle_info->listen_links_list)) {
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Internal error. listen links list is not empty");
 	}
 	if (!qb_list_empty(&handle_info->connect_links_list)) {
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Internal error. connect links list is not empty");
 	}
 
 	if (handle_info->listen_thread) {
 		pthread_cancel(handle_info->listen_thread);
 		pthread_join(handle_info->listen_thread, &thread_status);
 	}
 
 	if (handle_info->connect_thread) {
 		pthread_cancel(handle_info->connect_thread);
 		pthread_join(handle_info->connect_thread, &thread_status);
 	}
 
 	if (handle_info->listensockfd[0] >= 0) {
 		memset(&ev, 0, sizeof(struct epoll_event));
 		ev.events = EPOLLIN;
 		ev.data.fd = handle_info->listensockfd[0];
 		epoll_ctl(handle_info->listen_epollfd, EPOLL_CTL_DEL, handle_info->listensockfd[0], &ev);
 	}
 
 	if (handle_info->connectsockfd[0] >= 0) {
 		memset(&ev, 0, sizeof(struct epoll_event));
 		ev.events = EPOLLIN;
 		ev.data.fd = handle_info->connectsockfd[0];
 		epoll_ctl(handle_info->connect_epollfd, EPOLL_CTL_DEL, handle_info->connectsockfd[0], &ev);
 	}
 
 	_close_socketpair(knet_h, handle_info->connectsockfd);
 	_close_socketpair(knet_h, handle_info->listensockfd);
 
 	if (handle_info->listen_epollfd >= 0) {
 		close(handle_info->listen_epollfd);
 	}
 
 	if (handle_info->connect_epollfd >= 0) {
 		close(handle_info->connect_epollfd);
 	}
 
 	free(handle_info->event_subscribe_buffer);
 	free(handle_info);
 	knet_h->transports[KNET_TRANSPORT_SCTP] = NULL;
 
 	return 0;
 }
 
 static int _sctp_subscribe_init(knet_handle_t knet_h)
 {
 	int test_socket, savederrno;
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 	char dummy_events[100];
 	struct sctp_event_subscribe *events;
 	/* Below we set the first 6 fields of this expanding struct.
 	 * SCTP_EVENTS is deprecated, but SCTP_EVENT is not available
 	 * on Linux; on the other hand, FreeBSD and old Linux does not
 	 * accept small transfers, so we can't simply use this minimum
 	 * everywhere.  Thus we query and store the native size. */
 	const unsigned int subscribe_min = 6;
 
 	test_socket = socket(PF_INET, SOCK_STREAM, IPPROTO_SCTP);
 	if (test_socket < 0) {
 		if (errno == EPROTONOSUPPORT) {
 			log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP not supported, skipping initialization");
 			return 0;
 		}
 		savederrno = errno;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to create test socket: %s",
 			strerror(savederrno));
 		return savederrno;
 	}
 	handle_info->event_subscribe_kernel_size = sizeof dummy_events;
 	if (getsockopt(test_socket, IPPROTO_SCTP, SCTP_EVENTS, &dummy_events,
 		       &handle_info->event_subscribe_kernel_size)) {
 		close(test_socket);
 		savederrno = errno;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to query kernel size of struct sctp_event_subscribe: %s",
 			strerror(savederrno));
 		return savederrno;
 	}
 	close(test_socket);
 	if (handle_info->event_subscribe_kernel_size < subscribe_min) {
 		savederrno = ERANGE;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP,
 			"No kernel support for the necessary notifications: struct sctp_event_subscribe is %u bytes, %u needed",
 			handle_info->event_subscribe_kernel_size, subscribe_min);
 		return savederrno;
 	}
 	events = malloc(handle_info->event_subscribe_kernel_size);
 	if (!events) {
 		savederrno = errno;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP,
 			"Failed to allocate event subscribe buffer: %s", strerror(savederrno));
 		return savederrno;
 	}
 	memset(events, 0, handle_info->event_subscribe_kernel_size);
 	events->sctp_data_io_event = 1;
 	events->sctp_association_event = 1;
 	events->sctp_address_event = 1;
 	events->sctp_send_failure_event = 1;
 	events->sctp_peer_error_event = 1;
 	events->sctp_shutdown_event = 1;
 	handle_info->event_subscribe_buffer = (char *)events;
 	log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Size of struct sctp_event_subscribe is %u in kernel, %zu in user space",
 		  handle_info->event_subscribe_kernel_size, sizeof(struct sctp_event_subscribe));
 	return 0;
 }
 
 int sctp_transport_init(knet_handle_t knet_h)
 {
 	int err = 0, savederrno = 0;
 	sctp_handle_info_t *handle_info;
 	struct epoll_event ev;
 
 	if (knet_h->transports[KNET_TRANSPORT_SCTP]) {
 		errno = EEXIST;
 		return -1;
 	}
 
 	handle_info = malloc(sizeof(sctp_handle_info_t));
 	if (!handle_info) {
 		return -1;
 	}
 
 	memset(handle_info, 0,sizeof(sctp_handle_info_t));
 
 	knet_h->transports[KNET_TRANSPORT_SCTP] = handle_info;
 
 	savederrno = _sctp_subscribe_init(knet_h);
 	if (savederrno) {
 		err = -1;
 		goto exit_fail;
 	}
 
 	qb_list_init(&handle_info->listen_links_list);
 	qb_list_init(&handle_info->connect_links_list);
 
 	handle_info->listen_epollfd = epoll_create(KNET_EPOLL_MAX_EVENTS + 1);
 	if (handle_info->listen_epollfd < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to create epoll listen fd: %s",
 			strerror(savederrno));
 		goto exit_fail;
         }
 
 	if (_fdset_cloexec(handle_info->listen_epollfd)) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set CLOEXEC on listen_epollfd: %s",
 			strerror(savederrno));
 		goto exit_fail;
 	}
 
 	handle_info->connect_epollfd = epoll_create(KNET_EPOLL_MAX_EVENTS + 1);
         if (handle_info->connect_epollfd < 0) {
                 savederrno = errno;
 		err = -1;
                 log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to create epoll connect fd: %s",
                         strerror(savederrno));
                 goto exit_fail;
         }
 
 	if (_fdset_cloexec(handle_info->connect_epollfd)) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to set CLOEXEC on connect_epollfd: %s",
 			strerror(savederrno));
 		goto exit_fail;
 	}
 
 	if (_init_socketpair(knet_h, handle_info->connectsockfd) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to init connect socketpair: %s",
 			strerror(savederrno));
 		goto exit_fail;
 	}
 
 	memset(&ev, 0, sizeof(struct epoll_event));
 	ev.events = EPOLLIN;
 	ev.data.fd = handle_info->connectsockfd[0];
 	if (epoll_ctl(handle_info->connect_epollfd, EPOLL_CTL_ADD, handle_info->connectsockfd[0], &ev)) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to add connectsockfd[0] to connect epoll pool: %s",
 			strerror(savederrno));
 		goto exit_fail;
 	}
 
 	if (_init_socketpair(knet_h, handle_info->listensockfd) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to init listen socketpair: %s",
 			strerror(savederrno));
 		goto exit_fail;
 	}
 
 	memset(&ev, 0, sizeof(struct epoll_event));
 	ev.events = EPOLLIN;
 	ev.data.fd = handle_info->listensockfd[0];
 	if (epoll_ctl(handle_info->listen_epollfd, EPOLL_CTL_ADD, handle_info->listensockfd[0], &ev)) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to add listensockfd[0] to listen epoll pool: %s",
 			strerror(savederrno));
 		goto exit_fail;
 	}
 
 	/*
 	 * Start connect & listener threads
 	 */
 	set_thread_status(knet_h, KNET_THREAD_SCTP_LISTEN, KNET_THREAD_REGISTERED);
 	savederrno = pthread_create(&handle_info->listen_thread, 0, _sctp_listen_thread, (void *) knet_h);
 	if (savederrno) {
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to start sctp listen thread: %s",
 			strerror(savederrno));
 		goto exit_fail;
 	}
 
 	set_thread_status(knet_h, KNET_THREAD_SCTP_CONN, KNET_THREAD_REGISTERED);
 	savederrno = pthread_create(&handle_info->connect_thread, 0, _sctp_connect_thread, (void *) knet_h);
 	if (savederrno) {
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to start sctp connect thread: %s",
 			strerror(savederrno));
 		goto exit_fail;
 	}
 
 exit_fail:
 	if (err < 0) {
 		sctp_transport_free(knet_h);
 	}
 	errno = savederrno;
 	return err;
 }
 
 int sctp_transport_link_dyn_connect(knet_handle_t knet_h, int sockfd, struct knet_link *kn_link)
 {
 	kn_link->outsock = sockfd;
 	kn_link->status.dynconnected = 1;
 	kn_link->transport_connected = 1;
 	return 0;
 }
 #endif
diff --git a/libknet/transport_udp.c b/libknet/transport_udp.c
index bb4b800a..61ce3325 100644
--- a/libknet/transport_udp.c
+++ b/libknet/transport_udp.c
@@ -1,486 +1,482 @@
 /*
  * Copyright (C) 2016-2023 Red Hat, Inc.  All rights reserved.
  *
  * Author: Christine Caulfield <ccaulfie@redhat.com>
  *
  * This software licensed under LGPL-2.0+
  */
 
 #include "config.h"
 
 #include <string.h>
 #include <unistd.h>
 #include <errno.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <stdlib.h>
 #include <netinet/in.h>
 #include <netinet/ip.h>
 #include <netinet/ip_icmp.h>
 #if defined (IP_RECVERR) || defined (IPV6_RECVERR)
 #include <linux/errqueue.h>
 #endif
 
 #include "libknet.h"
 #include "compat.h"
 #include "host.h"
 #include "link.h"
 #include "logging.h"
 #include "common.h"
 #include "netutils.h"
 #include "transport_common.h"
 #include "transport_udp.h"
 #include "transports.h"
 #include "threads_common.h"
 
 typedef struct udp_handle_info {
 	struct qb_list_head links_list;
 } udp_handle_info_t;
 
 typedef struct udp_link_info {
 	struct qb_list_head list;
 	struct sockaddr_storage local_address;
 	int socket_fd;
 	int on_epoll;
 } udp_link_info_t;
 
 int udp_transport_link_set_config(knet_handle_t knet_h, struct knet_link *kn_link)
 {
 	int err = 0, savederrno = 0;
 	int sock = -1;
 	struct epoll_event ev;
 	udp_link_info_t *info;
 	udp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_UDP];
 #if defined (IP_RECVERR) || defined (IPV6_RECVERR)
 	int value;
 #endif
 
 	/*
 	 * Only allocate a new link if the local address is different
 	 */
 	qb_list_for_each_entry(info, &handle_info->links_list, list) {
 		if (memcmp(&info->local_address, &kn_link->src_addr, sizeof(struct sockaddr_storage)) == 0) {
 			log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Re-using existing UDP socket for new link");
 			kn_link->outsock = info->socket_fd;
 			kn_link->transport_link = info;
 			kn_link->transport_connected = 1;
 			return 0;
 		}
 	}
 
 	info = malloc(sizeof(udp_link_info_t));
 	if (!info) {
 		err = -1;
 		goto exit_error;
 	}
 	memset(info, 0, sizeof(udp_link_info_t));
 
 	sock = socket(kn_link->src_addr.ss_family, SOCK_DGRAM, 0);
 	if (sock < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to create listener socket: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	if (_configure_transport_socket(knet_h, sock, &kn_link->src_addr, kn_link->flags, "UDP") < 0) {
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 
 #ifdef IP_RECVERR
 	if (kn_link->src_addr.ss_family == AF_INET) {
 		value = 1;
 		if (setsockopt(sock, SOL_IP, IP_RECVERR, &value, sizeof(value)) <0) {
 			savederrno = errno;
 			err = -1;
 			log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to set RECVERR on socket: %s",
 				strerror(savederrno));
 			goto exit_error;
 		}
 		log_debug(knet_h, KNET_SUB_TRANSP_UDP, "IP_RECVERR enabled on socket: %i", sock);
 	}
 #else
 	log_debug(knet_h, KNET_SUB_TRANSP_UDP, "IP_RECVERR not available in this build/platform");
 #endif
 #ifdef IPV6_RECVERR
 	if (kn_link->src_addr.ss_family == AF_INET6) {
 		value = 1;
 		if (setsockopt(sock, SOL_IPV6, IPV6_RECVERR, &value, sizeof(value)) <0) {
 			savederrno = errno;
 			err = -1;
 			log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to set RECVERR on socket: %s",
 				strerror(savederrno));
 			goto exit_error;
 		}
 		log_debug(knet_h, KNET_SUB_TRANSP_UDP, "IPV6_RECVERR enabled on socket: %i", sock);
 	}
 #else
 	log_debug(knet_h, KNET_SUB_TRANSP_UDP, "IPV6_RECVERR not available in this build/platform");
 #endif
 
 	if (bind(sock, (struct sockaddr *)&kn_link->src_addr, sockaddr_len(&kn_link->src_addr))) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to bind listener socket: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	memset(&ev, 0, sizeof(struct epoll_event));
 	ev.events = EPOLLIN;
 	ev.data.fd = sock;
 
 	if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_ADD, sock, &ev)) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to add listener to epoll pool: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	info->on_epoll = 1;
 
 	if (_set_fd_tracker(knet_h, sock, KNET_TRANSPORT_UDP, 0, sockaddr_len(&kn_link->src_addr), info) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to set fd tracker: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	memmove(&info->local_address, &kn_link->src_addr, sizeof(struct sockaddr_storage));
 	info->socket_fd = sock;
 	qb_list_add(&info->list, &handle_info->links_list);
 
 	kn_link->outsock = sock;
 	kn_link->transport_link = info;
 	kn_link->transport_connected = 1;
 
 exit_error:
 	if (err) {
 		if (info) {
 			if (info->on_epoll) {
 				epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_DEL, sock, &ev);
 			}
 			free(info);
 		}
 		if (sock >= 0) {
 			close(sock);
 		}
 	}
 	errno = savederrno;
 	return err;
 }
 
 int udp_transport_link_clear_config(knet_handle_t knet_h, struct knet_link *kn_link)
 {
 	int err = 0, savederrno = 0;
 	int found = 0;
 	struct knet_host *host;
 	int link_idx;
 	udp_link_info_t *info = kn_link->transport_link;
 	struct epoll_event ev;
 
 	for (host = knet_h->host_head; host != NULL; host = host->next) {
 		for (link_idx = 0; link_idx < KNET_MAX_LINK; link_idx++) {
 			if (&host->link[link_idx] == kn_link)
 				continue;
 
 			if (host->link[link_idx].transport_link == info) {
 				found = 1;
 				break;
 			}
 		}
 	}
 
 	if (found) {
 		log_debug(knet_h, KNET_SUB_TRANSP_UDP, "UDP socket %d still in use", info->socket_fd);
 		savederrno = EBUSY;
 		err = -1;
 		goto exit_error;
 	}
 
 	if (info->on_epoll) {
 		memset(&ev, 0, sizeof(struct epoll_event));
 		ev.events = EPOLLIN;
 		ev.data.fd = info->socket_fd;
 
 		if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_DEL, info->socket_fd, &ev) < 0) {
 			savederrno = errno;
 			err = -1;
 			log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to remove UDP socket from epoll poll: %s",
 				strerror(errno));
 			goto exit_error;
 		}
 		info->on_epoll = 0;
 	}
 
 	if (_set_fd_tracker(knet_h, info->socket_fd, KNET_MAX_TRANSPORTS, 0, sockaddr_len(&kn_link->src_addr), NULL) < 0) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to set fd tracker: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	close(info->socket_fd);
 	qb_list_del(&info->list);
 	free(kn_link->transport_link);
 
 exit_error:
 	errno = savederrno;
 	return err;
 }
 
 int udp_transport_free(knet_handle_t knet_h)
 {
 	udp_handle_info_t *handle_info;
 
 	if (!knet_h->transports[KNET_TRANSPORT_UDP]) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	handle_info = knet_h->transports[KNET_TRANSPORT_UDP];
 
 	/*
 	 * keep it here while we debug list usage and such
 	 */
 	if (!qb_list_empty(&handle_info->links_list)) {
 		log_err(knet_h, KNET_SUB_TRANSP_UDP, "Internal error. handle list is not empty");
 		return -1;
 	}
 
 	free(handle_info);
 
 	knet_h->transports[KNET_TRANSPORT_UDP] = NULL;
 
 	return 0;
 }
 
 int udp_transport_init(knet_handle_t knet_h)
 {
 	udp_handle_info_t *handle_info;
 
 	if (knet_h->transports[KNET_TRANSPORT_UDP]) {
 		errno = EEXIST;
 		return -1;
 	}
 
 	handle_info = malloc(sizeof(udp_handle_info_t));
 	if (!handle_info) {
 		return -1;
 	}
 
 	memset(handle_info, 0, sizeof(udp_handle_info_t));
 
 	knet_h->transports[KNET_TRANSPORT_UDP] = handle_info;
 
 	qb_list_init(&handle_info->links_list);
 
 	return 0;
 }
 
 #if defined (IP_RECVERR) || defined (IPV6_RECVERR)
 static int read_errs_from_sock(knet_handle_t knet_h, int sockfd)
 {
 	int err = 0, savederrno = 0;
 	int got_err = 0;
 	char buffer[1024];
 	struct iovec iov;
 	struct msghdr msg;
 	struct cmsghdr *cmsg;
 	struct sock_extended_err *sock_err;
 	struct icmphdr icmph;
 	struct sockaddr_storage remote;
 	struct sockaddr_storage *origin;
 	char addr_str[KNET_MAX_HOST_LEN];
 	char port_str[KNET_MAX_PORT_LEN];
 	char addr_remote_str[KNET_MAX_HOST_LEN];
 	char port_remote_str[KNET_MAX_PORT_LEN];
 
 	iov.iov_base = &icmph;
 	iov.iov_len = sizeof(icmph);
 	msg.msg_name = (void*)&remote;
 	msg.msg_namelen = sizeof(remote);
 	msg.msg_iov = &iov;
 	msg.msg_iovlen = 1;
 	msg.msg_flags = 0;
 	msg.msg_control = buffer;
 	msg.msg_controllen = sizeof(buffer);
 
 	for (;;) {
 		err = recvmsg(sockfd, &msg, MSG_ERRQUEUE);
 		savederrno = errno;
 		if (err < 0) {
 			if (!got_err) {
 				errno = savederrno;
 				return -1;
 			} else {
 				return 0;
 			}
 		}
 		got_err = 1;
 		for (cmsg = CMSG_FIRSTHDR(&msg);cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
 			if (((cmsg->cmsg_level == SOL_IP) && (cmsg->cmsg_type == IP_RECVERR)) ||
 			    ((cmsg->cmsg_level == SOL_IPV6 && (cmsg->cmsg_type == IPV6_RECVERR)))) {
 				sock_err = (struct sock_extended_err*)(void *)CMSG_DATA(cmsg);
 				if (sock_err) {
 					switch (sock_err->ee_origin) {
 						case SO_EE_ORIGIN_NONE: /* no origin */
 						case SO_EE_ORIGIN_LOCAL: /* local source (EMSGSIZE) */
 							if (sock_err->ee_errno == EMSGSIZE || sock_err->ee_errno == EPERM) {
 								if (pthread_mutex_lock(&knet_h->kmtu_mutex) != 0) {
 									log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Unable to get mutex lock");
 									knet_h->kernel_mtu = 0;
 									break;
 								} else {
 									knet_h->kernel_mtu = sock_err->ee_info;
 									log_debug(knet_h, KNET_SUB_TRANSP_UDP, "detected kernel MTU: %u", knet_h->kernel_mtu);
 									pthread_mutex_unlock(&knet_h->kmtu_mutex);
 								}
 
 								force_pmtud_run(knet_h, KNET_SUB_TRANSP_UDP, 0, 0);
 							}
 							/*
 							 * those errors are way too noisy
 							 */
 							break;
 						case SO_EE_ORIGIN_ICMP:  /* ICMP */
 						case SO_EE_ORIGIN_ICMP6: /* ICMP6 */
 							origin = (struct sockaddr_storage *)(void *)SO_EE_OFFENDER(sock_err);
 							if (knet_addrtostr(origin, sizeof(*origin),
 									   addr_str, KNET_MAX_HOST_LEN,
 									   port_str, KNET_MAX_PORT_LEN) < 0) {
 								log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Received ICMP error from unknown source: %s", strerror(sock_err->ee_errno));
 
 							} else {
 								if (knet_addrtostr(&remote, sizeof(remote),
 									       addr_remote_str, KNET_MAX_HOST_LEN,
 									       port_remote_str, KNET_MAX_PORT_LEN) < 0) {
 									log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Received ICMP error from %s: %s destination unknown", addr_str, strerror(sock_err->ee_errno));
 								} else {
 									log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Received ICMP error from %s: %s %s", addr_str, strerror(sock_err->ee_errno), addr_remote_str);
 									if ((sock_err->ee_errno == ECONNREFUSED) || /* knet is not running on the other node */
 									    (sock_err->ee_errno == ECONNABORTED) || /* local kernel closed the socket */
 									    (sock_err->ee_errno == ENONET)       || /* network does not exist */
 									    (sock_err->ee_errno == ENETUNREACH)  || /* network unreachable */
 									    (sock_err->ee_errno == EHOSTUNREACH) || /* host unreachable */
 									    (sock_err->ee_errno == EHOSTDOWN)    || /* host down (from kernel/net/ipv4/icmp.c */
 									    (sock_err->ee_errno == ENETDOWN)) {     /* network down */
 										struct knet_host *host = NULL;
 										struct knet_link *kn_link = NULL;
 										int link_idx, found = 0;
 
 										for (host = knet_h->host_head; host != NULL; host = host->next) {
 											for (link_idx = 0; link_idx < KNET_MAX_LINK; link_idx++) {
 												kn_link = &host->link[link_idx];
 												if (kn_link->outsock == sockfd) {
 													if (!cmpaddr(&remote, &kn_link->dst_addr)) {
 														found = 1;
 														break;
 													}
 												}
 											}
 											if (found) {
 												break;
 											}
 										}
 
 										if ((host) && (kn_link) &&
 										    (kn_link->status.connected)) {
 											log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Setting down host %u link %i", host->host_id, kn_link->link_id);
 											/*
 											 * setting transport_connected = 0 will trigger
 											 * thread_heartbeat link_down process.
 											 *
 											 * the process terminates calling into transport_link_down
 											 * below that will set transport_connected = 1
 											 */
 											kn_link->transport_connected = 0;
 										}
 
 									}
 								}
 							}
 							break;
 					}
 				} else {
 					log_debug(knet_h, KNET_SUB_TRANSP_UDP, "No data in MSG_ERRQUEUE");
 				}
 			}
 		}
 	}
 }
 #else
 static int read_errs_from_sock(knet_handle_t knet_h, int sockfd)
 {
 	return 0;
 }
 #endif
 
 transport_sock_error_t udp_transport_rx_sock_error(knet_handle_t knet_h, int sockfd, int recv_err, int recv_errno)
 {
 	if (recv_errno == EAGAIN) {
 		read_errs_from_sock(knet_h, sockfd);
 	}
 	return KNET_TRANSPORT_SOCK_ERROR_IGNORE;
 }
 
 transport_sock_error_t udp_transport_tx_sock_error(knet_handle_t knet_h, int sockfd, int subsys, int recv_err, int recv_errno)
 {
 	if (recv_err < 0) {
-		log_trace(knet_h, KNET_SUB_TRANSP_UDP, "tx_sock_error, subsys=%d, recv_err=%d, recv_errno=%d", subsys, recv_err, recv_errno);
+		log_trace(knet_h, KNET_SUB_TRANSP_UDP, "tx_sock_error, subsys=%d, recv_err=%d: %s", subsys, recv_err, strerror(recv_errno));
 		if ((recv_errno == EMSGSIZE) || ((recv_errno == EPERM) && ((subsys == KNET_SUB_TX) || (subsys == KNET_SUB_PMTUD)))) {
 			read_errs_from_sock(knet_h, sockfd);
 			return KNET_TRANSPORT_SOCK_ERROR_IGNORE;
 		}
 		if ((recv_errno == EINVAL) || (recv_errno == EPERM) ||
 		    (recv_errno == ENETUNREACH) || (recv_errno == ENETDOWN) ||
 		    (recv_errno == EHOSTUNREACH)) {
-#ifdef DEBUG
 			if ((recv_errno == ENETUNREACH) || (recv_errno == ENETDOWN)) {
-				log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Sock: %d is unreachable.", sockfd);
+				log_trace(knet_h, KNET_SUB_TRANSP_UDP, "Sock: %d is unreachable.", sockfd);
 			}
-#endif
 			return KNET_TRANSPORT_SOCK_ERROR_INTERNAL;
 		}
 		if ((recv_errno == ENOBUFS) || (recv_errno == EAGAIN)) {
-#ifdef DEBUG
-			log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Sock: %d is overloaded. Slowing TX down", sockfd);
-#endif
+			log_trace(knet_h, KNET_SUB_TRANSP_UDP, "Sock: %d is overloaded. Slowing TX down", sockfd);
 			usleep(knet_h->threads_timer_res / 16);
 		} else {
 			read_errs_from_sock(knet_h, sockfd);
 		}
 		return KNET_TRANSPORT_SOCK_ERROR_RETRY;
 	}
 
 	return KNET_TRANSPORT_SOCK_ERROR_IGNORE;
 }
 
 transport_rx_isdata_t udp_transport_rx_is_data(knet_handle_t knet_h, int sockfd, struct knet_mmsghdr *msg)
 {
 	if (msg->msg_len == 0)
 		return KNET_TRANSPORT_RX_NOT_DATA_CONTINUE;
 
 	return KNET_TRANSPORT_RX_IS_DATA;
 }
 
 int udp_transport_link_dyn_connect(knet_handle_t knet_h, int sockfd, struct knet_link *kn_link)
 {
 	kn_link->status.dynconnected = 1;
 	return 0;
 }
 
 int udp_transport_link_is_down(knet_handle_t knet_h, struct knet_link *kn_link)
 {
 	/*
 	 * see comments about handling ICMP error messages
 	 */
 	kn_link->transport_connected = 1;
 	return 0;
 }