diff --git a/TODO b/TODO
index 1e3cbd22..77ba1f1d 100644
--- a/TODO
+++ b/TODO
@@ -1,100 +1,103 @@
 distro/packaging:
  - (issue) check why systemd doesn't let me set scheduler priority
            fixed for systemd unit file, LSB init + systemd still fails
            https://bugzilla.redhat.com/show_bug.cgi?id=893015
 
 link/host level:
+ - (issue) SCTP: in kernel fragmentation appears to be broken and needs
+           some investigation. workaround in place by disabling
+           in-kernel SCTP fragmentation
  - (issue) transports: plumb TX error handling on per-transport hooks
  - (issue) transports: review all error handling code failures,
            specially on clear_config, to not leak and better clean
            in case of errors
  - (issue) improve test suite to cover for all transports (needs transport list API)
  - (issue) UDP/SCTP support for dynamic links (aka no dst_address)
            this one needs plumbing inside RX thread
  - (issue) change knet_bench to allow protocol specification per link
  - (issue) review memory locking across
  - (issue) simplify handling of DATA and HOSTINFO code paths in send/recv code
  - (issue) need bind to interface for dynamic ip local interfaces vs src ip
            address or find a way to autodetect the new ip on that interface
            (listen to kernel netlink?)
  - (issue) must implement link auth via user/passwd. This is necessary
            in case key is leaked.
  - (issue) standardize exit labels (ex out_unlock / exit_unlock) and variable/function
            names.
  - (issue) review how TX onwire pckt info are filled in between inbuf/socket/frags
  - (rfe)   add fd_tracker error exit check and perhaps use it for local sockets too
            to make it easier to identify leaks and fd abuse
  - (rfe)   add 2 new APIs: addr2str / str2addr and transport list query
  - (rfe)   link status callback notification
  - (rfe)   compress: should only compress user data, we will add a bit in the data
                      header to indicate if the pckt is compressed or not (save time).
                      this approach allow runtime change of compress.
                      open questions are: methods? level? zlib? lzo? bz? lzma? xz?
                                         how much do we save by compressin our header?
            compress must happen before encrypt
            we can express compress data in packet type without adding extra
            flags to the headers. DATA -> BZ/GZDATA and we can change that
            right before encrypting. Using a similar approach to PING_MASK
  - (rfe)   crypto: expand API to support dual key for rekey process
  - (rfe)   link id made optional? right now we need the link id to match
            on both sides of the connection. this is somewhat annoying
            from a user perspective. Evaluate if we can make it optional.
  - (rfe)   make hostid autogenerated in a consistent way?
  - (rfe)   Check IPV6_NEXTHOP for v6 sockets and find equivalent for v4 (Jesper?)
            this would allow using one IP address as destination via multiple links
  - (rfe)   add statistics at different levels (pckt per host/link, bytes, crypto
            overhead, frame overhead, pure data...)
  - (rfe)   link connection access-list
            (chrissie has working generic code for this one, needs merging and API)
  - (rfe)   improve host-to-host communication. Right now I am not satisfied with
            the current implementation, even if it works.
  - (rfe)   implement link switching via scoring system based on:
            1) latency
            2) priority (auto/manual)
            3) usage (over XX% traffic start RR)
            4) flapping of the links (time/sec)
            this requires complex rules setting and a super efficent way to look
            up destination links
 	   5) if links are stable, reduce the number of links in a-a
               min 2
  - (rfe)   benchmark tests for all critical paths in switching threads
  - (rfe)   network convergence protocol (host exchange)
  - (rfe)   reswitching of packets
  - (rfe)   look into UDP+ECN bit set to avoid overloading sockets?
  - (rfe)   add openssl support?
  - (rfe)   consider adding threadpools to process data packets in parallel
 
 libknet:
  - (issue) review logging policy/levels in public api call
            example is scanning for active links in a host that would return
            a half gazzillion useless log entries
  - (issue) add .3 man pages
 
 libtap:
  - (issue) add .3 man pages
  - (issue) improve tests to cover thread safety and better error codes
            specially from the up/down handling.
  - (rfe)   consider adding dhcp support for tap device
            it can be done now via up.d/ scripts, but it's not intuitive
 
 kronostnetd:
  - (issue) beside the code that is as bad as it can possibly be and
            will make you wish to have a tea spoon handy to carve your
            eyeballs out, the vty needs a good clean/rewrite
  - (issue) fix config file format. current one will make you scream
  - (issue) missing output from several command execution failures in vty mode
  - (issue) fix check_param for ip/prefix/crypto
            (this is part of the rewrite as it needs more clever arg parsing
             code/method)
  - (rfe)   add logging config (per subsystem/global)
  - (rfe)   split vty_cmd_files to be smaller. it's just too big to handle
            nicely.
  - (rfe)   add equivalent of "description: ...." to various levels
  - (rfe)   add optional options. right now it's necessary to specify everything
            all the time.
  - (rfe)   implement tab completion on options
 
 general:
  - (issue) missing unit tests on many many bits
  - (issue) missing docs of all kind, devel, users, admin guide.
  - (rfe)   check code with coverity
diff --git a/libknet/transport_sctp.c b/libknet/transport_sctp.c
index 03a6a101..88655e34 100644
--- a/libknet/transport_sctp.c
+++ b/libknet/transport_sctp.c
@@ -1,1303 +1,1312 @@
 #include "config.h"
 
 #include <string.h>
 #include <unistd.h>
 #include <errno.h>
 #include <pthread.h>
 #include <sys/epoll.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <malloc.h>
 
 #include "host.h"
 #include "link.h"
 #include "logging.h"
 #include "common.h"
 #include "transports.h"
 #include "threads_common.h"
 
 #ifdef HAVE_NETINET_SCTP_H
 #include <netinet/sctp.h>
 
 /*
  * https://en.wikipedia.org/wiki/SCTP_packet_structure
  */
 #define KNET_PMTUD_SCTP_OVERHEAD_COMMON 12
 #define KNET_PMTUD_SCTP_OVERHEAD_DATA_CHUNK 16
 #define KNET_PMTUD_SCTP_OVERHEAD KNET_PMTUD_SCTP_OVERHEAD_COMMON + KNET_PMTUD_SCTP_OVERHEAD_DATA_CHUNK
 
 /*
  * Time to sleep before reconnection attempts. in microseconds
  */
 #define KNET_SCTP_SLEEP_TIME 1000000
 
 /*
  * this value is per listener
  */
 #define MAX_ACCEPTED_SOCKS 256
 
 typedef struct sctp_handle_info {
 	struct knet_list_head listen_links_list;
 	struct knet_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;
 } sctp_handle_info_t;
 
 /*
  * use by fd_tracker data type
  */
 #define SCTP_NO_LINK_INFO      0
 #define SCTP_LISTEN_LINK_INFO  1
 #define SCTP_CONNECT_LINK_INFO 2
 
 /*
  * this value is per listener
  */
 #define MAX_ACCEPTED_SOCKS 256
 
 typedef struct sctp_listen_link_info {
 	struct knet_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;
 } sctp_listen_link_info_t;
 
 typedef struct sctp_connect_link_info {
 	struct knet_list_head list;
 	sctp_listen_link_info_t *listener;
 	struct knet_link *link;
 	struct sockaddr_storage dst_address;
 	int connect_sock;
 	int on_connected_epoll;
 	int on_rx_epoll;
 	int close_sock;
 } 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 *link)
 {
 	int err = 0, savederrno = 0;
 	sctp_connect_link_info_t *info = link->transport_link;
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 	struct epoll_event ev;
 
 	if (info->on_connected_epoll) {
 		memset(&ev, 0, sizeof(struct epoll_event));
 		ev.events = EPOLLOUT;
 		ev.data.fd = info->connect_sock;
 		if (epoll_ctl(handle_info->connect_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 the epoll pool: %s",
 				strerror(errno));
 			goto exit_error;
 		}
 		info->on_connected_epoll = 0;
 	}
 
 exit_error:
 	if (info->connect_sock != -1) {
 		if (_set_fd_tracker(knet_h, info->connect_sock, KNET_MAX_TRANSPORTS, SCTP_NO_LINK_INFO, 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;
 		}
 		close(info->connect_sock);
 		info->connect_sock = -1;
 	}
 
 	errno = savederrno;
 	return err;
 }
 
 static int _enable_sctp_notifications(knet_handle_t knet_h, int sock, const char *type)
 {
 	int err = 0, savederrno = 0;
 	struct sctp_event_subscribe events;
 
 	memset(&events, 0, sizeof (events));
 	events.sctp_data_io_event = 1;
 	events.sctp_association_event = 1;
 	events.sctp_send_failure_event = 1;
 	events.sctp_address_event = 1;
 	events.sctp_peer_error_event = 1;
 	events.sctp_shutdown_event = 1;
 	if (setsockopt(sock, IPPROTO_SCTP, SCTP_EVENTS, &events, sizeof (events)) < 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, const char *type)
 {
 	int err = 0, savederrno = 0;
 	int value;
 
 	if (_configure_transport_socket(knet_h, sock, address, type) < 0) {
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 
 	value = 1;
 	if (setsockopt(sock, SOL_SCTP, 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;
 	}
 
+	value = 1;
+	if (setsockopt(sock, SOL_SCTP, SCTP_DISABLE_FRAGMENTS, &value, sizeof(value)) < 0) {
+		savederrno = errno;
+		err = -1;
+		log_err(knet_h, KNET_SUB_TRANSPORT, "Unable to set sctp disable fragments: %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 *link)
 {
 	int err = 0, savederrno = 0;
 	sctp_connect_link_info_t *info = link->transport_link;
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 	struct epoll_event ev;
 
 	if (connect(info->connect_sock, (struct sockaddr *)&link->dst_addr, sizeof(struct sockaddr_storage)) < 0) {
 		if ((errno != EALREADY) && (errno != EINPROGRESS) && (errno != EISCONN)) {
 			savederrno = errno;
 			err = -1;
 			log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to connect SCTP socket %d: %s",
 				info->connect_sock, strerror(savederrno));
 			goto exit_error;
 		}
 	}
 
 	if (!info->on_connected_epoll) {
 		memset(&ev, 0, sizeof(struct epoll_event));
 		ev.events = EPOLLOUT;
 		ev.data.fd = info->connect_sock;
 		if (epoll_ctl(handle_info->connect_epollfd, EPOLL_CTL_ADD, info->connect_sock, &ev)) {
 			savederrno = errno;
 			err = -1;
 			log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to add send/recv to epoll pool: %s",
 				strerror(savederrno));
 			goto exit_error;
 		}
 		info->on_connected_epoll = 1;
 	}
 
 exit_error:
 	errno = savederrno;
 	return err;
 }
 
 static int _create_connect_socket(knet_handle_t knet_h, struct knet_link *link)
 {
 	int err = 0, savederrno = 0;
 	sctp_connect_link_info_t *info = link->transport_link;
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 	struct epoll_event ev;
 	int connect_sock;
 
 	connect_sock = socket(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, &link->dst_addr, "SCTP connect") < 0) {
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 
 	if (_set_fd_tracker(knet_h, connect_sock, KNET_TRANSPORT_SCTP, SCTP_CONNECT_LINK_INFO, 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;
 	}
 
 	info->connect_sock = connect_sock;
 	info->close_sock = 0;
 	if (_reconnect_socket(knet_h, link) < 0) {
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 
 exit_error:
 	if (err) {
 		if (info->on_connected_epoll) {
 			epoll_ctl(handle_info->connect_epollfd, EPOLL_CTL_DEL, connect_sock, &ev);
 		}
 		if (connect_sock >= 0) {
 			close(connect_sock);
 		}
 	}
 	errno = savederrno;
 	return err;
 }
 
 /*
  * 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 diretly (close/reconnect/etc) due
  *       to locking context. We need to delegate that to their respective
  *       management threads within 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 abouse of recv_err is to detect notifications
  * generated by sockets created by listen().
  */
 static int sctp_transport_rx_sock_error(knet_handle_t knet_h, int sockfd, int recv_err, int recv_errno)
 {
 	struct epoll_event ev;
 	sctp_connect_link_info_t *connect_info = knet_h->knet_transport_fd_tracker[sockfd].data;
 	sctp_listen_link_info_t *listen_info = knet_h->knet_transport_fd_tracker[sockfd].data;
 	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) {
 				connect_info->link->transport_connected = 0;
 				if (connect_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;
 					}
 					connect_info->on_rx_epoll = 0;
 				}
 				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_LISTEN_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:
 			break;
 	}
 	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
  */
 static int sctp_transport_rx_is_data(knet_handle_t knet_h, int sockfd, struct mmsghdr msg)
 {
 	int 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;
 
 	if (!(msg.msg_hdr.msg_flags & MSG_NOTIFICATION)) {
 		if (msg.msg_len == 0) {
 			log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "received 0 bytes len packet: %d", sockfd);
 			/*
 			 * NOTE: with event notification enabled, we receive error twice:
 			 *       1) from the event notification
 			 *       2) followed by a 0 byte msg_len
 			 *
 			 * This is generally not a problem if not for causing extra
 			 * handling for the same issue. Should we drop notifications
 			 * and keep the code generic (handle all errors via msg_len = 0)
 			 * or keep the duplication as safety measure, or drop msg_len = 0
 			 * handling (what about sockets without events enabled?)
 			 */
 			sctp_transport_rx_sock_error(knet_h, sockfd, 1, 0);
 			return 1;
 		}
 		return 2;
 	}
 
 	if (!(msg.msg_hdr.msg_flags & MSG_EOR)) {
 		return 1;
 	}
 
 	for (i=0; i< iovlen; i++) {
 		snp = iov[i].iov_base;
 
 		switch (snp->sn_header.sn_type) {
 			case SCTP_ASSOC_CHANGE:
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp assoc change");
 				sac = &snp->sn_assoc_change;
 				if (sac->sac_state == SCTP_COMM_LOST) {
 					log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp assoc change: comm_lost");
 					sctp_transport_rx_sock_error(knet_h, sockfd, 2, 0);
 				}
 				break;
 			case SCTP_SHUTDOWN_EVENT:
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp shutdown event");
 				sctp_transport_rx_sock_error(knet_h, sockfd, 2, 0);
 				break;
 			case SCTP_SEND_FAILED:
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp send failed");
 				break;
 			case SCTP_PEER_ADDR_CHANGE:
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp peer addr change");
 				break;
 			case SCTP_REMOTE_ERROR:
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] sctp remote error");
 				break;
 			default:
 				log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "[event] unknown sctp event type: %hu\n", snp->sn_header.sn_type);
 				break;
 		}
 	}
 	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(knet_handle_t knet_h, int connect_sock)
 {
 	int err;
 	struct epoll_event ev;
 	unsigned int status, len = sizeof(status);
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 	sctp_connect_link_info_t *info = knet_h->knet_transport_fd_tracker[connect_sock].data;
 	struct knet_link *link = 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 (info->close_sock) {
 		if (_close_connect_socket(knet_h, link) < 0) {
 			log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to close sock %d from _handle_connected_sctp: %s", connect_sock, strerror(errno));
 			return;
 		}
 		info->close_sock = 0;
 		if (_create_connect_socket(knet_h, link) < 0) {
 			log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to recreate connecting sock! %s", 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, link->status.dst_ipaddr, link->status.dst_port,
 			 strerror(status));
 
 		/*
 		 * No need to create a new socket if connect failed,
 		 * just retry connect
 		 */
 		_reconnect_socket(knet_h, info->link);
 		return;
 	}
 
 	/*
 	 * Connected - Remove us from the connect epoll
 	 */
 	memset(&ev, 0, sizeof(struct epoll_event));
 	ev.events = EPOLLOUT;
 	ev.data.fd = connect_sock;
 	if (epoll_ctl(handle_info->connect_epollfd, EPOLL_CTL_DEL, connect_sock, &ev)) {
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove connected socket %d from epoll pool: %s",
 			connect_sock, strerror(errno));
 	}
 	info->on_connected_epoll = 0;
 
 	link->transport_connected = 1;
 	link->outsock = info->connect_sock;
 
 	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;
 
 	log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP handler fd %d now connected to %s port %s",
 		  connect_sock,
 		  link->status.dst_ipaddr, link->status.dst_port);
 }
 
 static void _handle_connected_sctp_errors(knet_handle_t knet_h)
 {
 	int sockfd = -1;
 	sctp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_SCTP];
 	sctp_connect_link_info_t *info;
 
 	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;
 	}
 
 	log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Processing connected error on socket: %d", sockfd);
 
 	info = knet_h->knet_transport_fd_tracker[sockfd].data;
 
 	info->close_sock = 1;
 	info->link->transport_connected = 0;
 	_reconnect_socket(knet_h, info->link);
 }
 
 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];
 
 	while (!shutdown_in_progress(knet_h)) {
 		nev = epoll_wait(handle_info->connect_epollfd, events, KNET_EPOLL_MAX_EVENTS, -1);
 
 		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 = pthread_rwlock_wrlock(&knet_h->global_rwlock);
 		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_errors(knet_h);
 			} else {
 				if (_is_valid_fd(knet_h, events[i].data.fd) == 1) {
 					_handle_connected_sctp(knet_h, events[i].data.fd);
 				} else {
 					log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Received stray notification for dead fd %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_SCTP_SLEEP_TIME);
 	}
 	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 *print_str[2];
 
 	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 (_transport_addrtostr((struct sockaddr *)&ss, sizeof(ss), print_str) < 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",
 						print_str[0], print_str[1]);
 
 	/*
 	 * 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, "SCTP incoming") < 0) {
 		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;
 	}
 
 	if (_set_fd_tracker(knet_h, new_fd, KNET_TRANSPORT_SCTP, SCTP_LISTEN_LINK_INFO, 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 (listen fd: %d). index: %d", new_fd, print_str[0], info->listen_sock, i);
 
 exit_error:
 	_transport_addrtostr_free(print_str);
 	if (err) {
 		if ((i >= 0) || (i < MAX_ACCEPTED_SOCKS)) {
 			info->accepted_socks[i] = -1;
 		}
 		_set_fd_tracker(knet_h, new_fd, KNET_MAX_TRANSPORTS, SCTP_NO_LINK_INFO, NULL);
 		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_listen_link_info_t *info;
 	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;
 	}
 
 	log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "Processing listen error on socket: %d", sockfd);
 
 	info = knet_h->knet_transport_fd_tracker[sockfd].data;
 
 	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);
 			_set_fd_tracker(knet_h, sockfd, KNET_MAX_TRANSPORTS, SCTP_NO_LINK_INFO, NULL);
 			info->accepted_socks[i] = -1;
 			close(sockfd);
 		}
 	}
 }
 
 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];
 
 	while (!shutdown_in_progress(knet_h)) {
 		nev = epoll_wait(handle_info->listen_epollfd, events, KNET_EPOLL_MAX_EVENTS, -1);
 
 		if (nev < 0) {
 			log_debug(knet_h, KNET_SUB_TRANSP_SCTP, "SCTP listen handler EPOLL ERROR: %s",
 				  strerror(errno));
 			continue;
 		}
 
 		savederrno = pthread_rwlock_wrlock(&knet_h->global_rwlock);
 		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);
 	}
 	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 *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
 	 */
 	knet_list_for_each_entry(info, &handle_info->listen_links_list, list) {
 		if (memcmp(&info->src_address, &link->src_addr, sizeof(struct sockaddr_storage)) == 0) {
 			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));
 	memcpy(&info->src_address, &link->src_addr, sizeof(struct sockaddr_storage));
 
 	listen_sock = socket(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, &link->src_addr, "SCTP listener") < 0) {
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 
 	if (bind(listen_sock, (struct sockaddr *)&link->src_addr, sizeof(struct sockaddr_storage)) < 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_LISTEN_LINK_INFO, 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 = 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;
 	knet_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, link->status.src_ipaddr, link->status.src_port);
 
 exit_error:
 	if (err) {
 		if (info->on_listener_epoll) {
 			epoll_ctl(handle_info->listen_epollfd, EPOLL_CTL_DEL, listen_sock, &ev);
 		}
 		if (listen_sock >= 0) {
 			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 *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 = 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] == link)
 				continue;
 
 			link_info = host->link[link_idx].transport_link;
 			if ((link_info) &&
 			    (link_info->listener == info) &&
 			    (host->link[link_idx].status.enabled == 1)) {
 				found = 1;
 				break;
 			}
 		}
 	}
 
 	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, 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;
 	}
 
 	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;
 			close(info->accepted_socks[i]);
 			if (_set_fd_tracker(knet_h, info->accepted_socks[i], KNET_MAX_TRANSPORTS, SCTP_NO_LINK_INFO, 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;
 		}
 	}
 
 	knet_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
  */
 static int sctp_transport_link_set_config(knet_handle_t knet_h, struct knet_link *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));
 
 	link->transport_link = info;
 	info->link = link;
 
 	memcpy(&info->dst_address, &link->dst_addr, sizeof(struct sockaddr_storage));
 	info->on_connected_epoll = 0;
 	info->connect_sock = -1;
 
 	info->listener = sctp_link_listener_start(knet_h, link);
 	if (!info->listener) {
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 
 	if (_create_connect_socket(knet_h, link) < 0) {
 		savederrno = errno;
 		err = -1;
 		goto exit_error;
 	}
 
 	knet_list_add(&info->list, &handle_info->connect_links_list);
 
 	link->outsock = info->connect_sock;
 
 exit_error:
 	if (err) {
 		if (info) {
 			if (info->connect_sock) {
 				close(info->connect_sock);
 			}
 			if (info->listener) {
 				sctp_link_listener_stop(knet_h, link);
 			}
 			link->transport_link = NULL;
 			free(info);
 		}
 	}
 	errno = savederrno;
 	return err;
 }
 
 /*
  * called with global wrlock
  * FIX exit path error handling
  */
 static int sctp_transport_link_clear_config(knet_handle_t knet_h, struct knet_link *link)
 {
 	int err = 0, savederrno = 0;
 	sctp_connect_link_info_t *info;
 	struct epoll_event ev;
 
 	if (!link) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	info = link->transport_link;
 
 	if (!info) {
 		errno = EINVAL;
 		return -1;
 	}
 
 	if ((sctp_link_listener_stop(knet_h, link) <0) && (errno != EBUSY)) {
 		savederrno = errno;
 		err = -1;
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Unable to remove listener trasport: %s",
 			strerror(savederrno));
 		goto exit_error;
 	}
 
 	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 (_close_connect_socket(knet_h, 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;
 	}
 
 	knet_list_del(&info->list);
 
 	free(info);
 	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.
  */
 
 static 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 (!knet_list_empty(&handle_info->listen_links_list)) {
 		log_err(knet_h, KNET_SUB_TRANSP_SCTP, "Internal error. listen links list is not empty");
 	}
 	if (!knet_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);
 	knet_h->transports[KNET_TRANSPORT_SCTP] = NULL;
 
 	return 0;
 }
 
 static 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;
 
 	knet_list_init(&handle_info->listen_links_list);
 	knet_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
 	 */
 	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;
         }
 
 	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;
 }
 
 static knet_transport_ops_t sctp_transport_ops = {
 	.transport_name = "SCTP",
 	.transport_mtu_overhead = KNET_PMTUD_SCTP_OVERHEAD,
 	.transport_init = sctp_transport_init,
 	.transport_free = sctp_transport_free,
 	.transport_link_set_config = sctp_transport_link_set_config,
 	.transport_link_clear_config = sctp_transport_link_clear_config,
 	.transport_rx_sock_error = sctp_transport_rx_sock_error,
 	.transport_rx_is_data = sctp_transport_rx_is_data,
 };
 
 knet_transport_ops_t *get_sctp_transport()
 {
 
 	return &sctp_transport_ops;
 }
 #else // HAVE_NETINET_SCTP_H
 knet_transport_ops_t *get_sctp_transport()
 {
 	return NULL;
 }
 #endif