diff --git a/programs/ekr_loop_offload.c b/programs/ekr_loop_offload.c
new file mode 100644
index 0000000..1296d0f
--- /dev/null
+++ b/programs/ekr_loop_offload.c
@@ -0,0 +1,559 @@
+/*
+ * Copyright (C) 2011-2013 Michael Tuexen
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.	IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifdef _WIN32
+#define _CRT_SECURE_NO_WARNINGS
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#ifndef _WIN32
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include <pthread.h>
+#include <unistd.h>
+#else
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#endif
+#include <usrsctp.h>
+
+#define MAX_PACKET_SIZE (1<<16)
+#define LINE_LENGTH (1<<20)
+#define DISCARD_PPID 39
+
+#ifdef _WIN32
+static DWORD WINAPI
+#else
+static void *
+#endif
+handle_packets(void *arg)
+{
+#ifdef _WIN32
+	SOCKET *fdp;
+#else
+	int *fdp;
+#endif
+	char *dump_buffer;
+	struct sctp_common_header *hdr;
+	ssize_t length;
+	char buffer[MAX_PACKET_SIZE];
+	uint32_t received_crc32c, computed_crc32c;
+
+#ifdef _WIN32
+	fdp = (SOCKET *)arg;
+#else
+	fdp = (int *)arg;
+#endif
+	for (;;) {
+#if defined(__NetBSD__)
+		pthread_testcancel();
+#endif
+		length = recv(*fdp, buffer, MAX_PACKET_SIZE, 0);
+		if (length > 0) {
+			if ((dump_buffer = usrsctp_dumppacket(buffer, (size_t)length, SCTP_DUMP_INBOUND)) != NULL) {
+				//fprintf(stderr, "%s", dump_buffer);
+				usrsctp_freedumpbuffer(dump_buffer);
+			}
+			if ((size_t)length >= sizeof(struct sctp_common_header)) {
+				hdr = (struct sctp_common_header *)buffer;
+				received_crc32c = hdr->crc32c;
+				hdr->crc32c = htonl(0);
+				computed_crc32c = usrsctp_crc32c(buffer, (size_t)length);
+				hdr->crc32c = received_crc32c;
+				if (received_crc32c == computed_crc32c) {
+					usrsctp_conninput(fdp, buffer, (size_t)length, 0);
+				} else {
+					fprintf(stderr, "Wrong CRC32c: expected %08x received %08x\n",
+					        ntohl(computed_crc32c), ntohl(received_crc32c));
+				}
+			} else {
+				fprintf(stderr, "Packet too short: length %zu", (size_t)length);
+			}
+		}
+	}
+#ifdef _WIN32
+	return 0;
+#else
+	return (NULL);
+#endif
+}
+
+static int
+conn_output(void *addr, void *buffer, size_t length, uint8_t tos, uint8_t set_df)
+{
+	char *dump_buffer;
+	struct sctp_common_header *hdr;
+#ifdef _WIN32
+	SOCKET *fdp;
+#else
+	int *fdp;
+#endif
+
+#ifdef _WIN32
+	fdp = (SOCKET *)addr;
+#else
+	fdp = (int *)addr;
+#endif
+	if (length >= sizeof(struct sctp_common_header)) {
+		hdr = (struct sctp_common_header *)buffer;
+		hdr->crc32c = usrsctp_crc32c(buffer, (size_t)length);
+	}
+	if ((dump_buffer = usrsctp_dumppacket(buffer, length, SCTP_DUMP_OUTBOUND)) != NULL) {
+		//fprintf(stderr, "%s", dump_buffer);
+		usrsctp_freedumpbuffer(dump_buffer);
+	}
+#ifdef _WIN32
+	if (send(*fdp, buffer, (int)length, 0) == SOCKET_ERROR) {
+		return (WSAGetLastError());
+#else
+	if (send(*fdp, buffer, length, 0) < 0) {
+		return (errno);
+#endif
+	} else {
+		return (0);
+	}
+}
+
+static int
+receive_cb(struct socket *sock, union sctp_sockstore addr, void *data,
+           size_t datalen, struct sctp_rcvinfo rcv, int flags, void *ulp_info)
+{
+	printf("Message %p received on sock = %p.\n", data, (void *)sock);
+	if (data) {
+		if ((flags & MSG_NOTIFICATION) == 0) {
+			printf("Messsage of length %d received via %p:%u on stream %d with SSN %u and TSN %u, PPID %u, context %u, flags %x.\n",
+			       (int)datalen,
+			       addr.sconn.sconn_addr,
+			       ntohs(addr.sconn.sconn_port),
+			       rcv.rcv_sid,
+			       rcv.rcv_ssn,
+			       rcv.rcv_tsn,
+			       ntohl(rcv.rcv_ppid),
+			       rcv.rcv_context,
+			       flags);
+		}
+		free(data);
+	} else {
+		usrsctp_deregister_address(ulp_info);
+		usrsctp_close(sock);
+	}
+	return (1);
+}
+
+#if 0
+static void
+print_addresses(struct socket *sock)
+{
+	int i, n;
+	struct sockaddr *addrs, *addr;
+
+	n = usrsctp_getladdrs(sock, 0, &addrs);
+	addr = addrs;
+	for (i = 0; i < n; i++) {
+		switch (addr->sa_family) {
+		case AF_INET:
+		{
+			struct sockaddr_in *sin;
+			char buf[INET_ADDRSTRLEN];
+			const char *name;
+
+			sin = (struct sockaddr_in *)addr;
+			name = inet_ntop(AF_INET, &sin->sin_addr, buf, INET_ADDRSTRLEN);
+			printf("%s:%d", name, ntohs(sin->sin_port));
+			break;
+		}
+		case AF_INET6:
+		{
+			struct sockaddr_in6 *sin6;
+			char buf[INET6_ADDRSTRLEN];
+			const char *name;
+
+			sin6 = (struct sockaddr_in6 *)addr;
+			name = inet_ntop(AF_INET6, &sin6->sin6_addr, buf, INET6_ADDRSTRLEN);
+			printf("%s:%d", name, ntohs(sin6->sin6_port));
+			break;
+		}
+		case AF_CONN:
+		{
+			struct sockaddr_conn *sconn;
+
+			sconn = (struct sockaddr_conn *)addr;
+			printf("%p:%d", sconn->sconn_addr, ntohs(sconn->sconn_port));
+			break;
+		}
+		default:
+			printf("Unknown family: %d", addr->sa_family);
+			break;
+		}
+		addr = (struct sockaddr *)((caddr_t)addr + addr->sa_len);
+		if (i != n - 1) {
+			printf(",");
+		}
+	}
+	if (n > 0) {
+		usrsctp_freeladdrs(addrs);
+	}
+	printf("<->");
+	n = usrsctp_getpaddrs(sock, 0, &addrs);
+	addr = addrs;
+	for (i = 0; i < n; i++) {
+		switch (addr->sa_family) {
+		case AF_INET:
+		{
+			struct sockaddr_in *sin;
+			char buf[INET_ADDRSTRLEN];
+			const char *name;
+
+			sin = (struct sockaddr_in *)addr;
+			name = inet_ntop(AF_INET, &sin->sin_addr, buf, INET_ADDRSTRLEN);
+			printf("%s:%d", name, ntohs(sin->sin_port));
+			break;
+		}
+		case AF_INET6:
+		{
+			struct sockaddr_in6 *sin6;
+			char buf[INET6_ADDRSTRLEN];
+			const char *name;
+
+			sin6 = (struct sockaddr_in6 *)addr;
+			name = inet_ntop(AF_INET6, &sin6->sin6_addr, buf, INET6_ADDRSTRLEN);
+			printf("%s:%d", name, ntohs(sin6->sin6_port));
+			break;
+		}
+		case AF_CONN:
+		{
+			struct sockaddr_conn *sconn;
+
+			sconn = (struct sockaddr_conn *)addr;
+			printf("%p:%d", sconn->sconn_addr, ntohs(sconn->sconn_port));
+			break;
+		}
+		default:
+			printf("Unknown family: %d", addr->sa_family);
+			break;
+		}
+		addr = (struct sockaddr *)((caddr_t)addr + addr->sa_len);
+		if (i != n - 1) {
+			printf(",");
+		}
+	}
+	if (n > 0) {
+		usrsctp_freepaddrs(addrs);
+	}
+	printf("\n");
+}
+#endif
+
+void
+debug_printf(const char *format, ...)
+{
+	va_list ap;
+
+	va_start(ap, format);
+	vprintf(format, ap);
+	va_end(ap);
+}
+
+int
+main(void)
+{
+	struct sockaddr_in sin_s, sin_c;
+	struct sockaddr_conn sconn;
+#ifdef _WIN32
+	SOCKET fd_c, fd_s;
+#else
+	int fd_c, fd_s;
+#endif
+	struct socket *s_c, *s_s, *s_l;
+#ifdef _WIN32
+	HANDLE tid_c, tid_s;
+#else
+	pthread_t tid_c, tid_s;
+#endif
+	int cur_buf_size, snd_buf_size, rcv_buf_size;
+	socklen_t opt_len;
+	struct sctp_sndinfo sndinfo;
+	char *line;
+#ifdef _WIN32
+	WSADATA wsaData;
+#endif
+
+#ifdef _WIN32
+	if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) {
+		printf("WSAStartup failed\n");
+		exit (EXIT_FAILURE);
+	}
+#endif
+	usrsctp_init(0, conn_output, debug_printf);
+	usrsctp_enable_crc32c_offload();
+	/* set up a connected UDP socket */
+#ifdef _WIN32
+	if ((fd_c = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == INVALID_SOCKET) {
+		printf("socket() failed with error: %d\n", WSAGetLastError());
+		exit(EXIT_FAILURE);
+	}
+	if ((fd_s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == INVALID_SOCKET) {
+		printf("socket() failed with error: %d\n", WSAGetLastError());
+		exit(EXIT_FAILURE);
+	}
+#else
+	if ((fd_c = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
+		perror("socket");
+		exit(EXIT_FAILURE);
+	}
+	if ((fd_s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
+		perror("socket");
+		exit(EXIT_FAILURE);
+	}
+#endif
+	memset(&sin_c, 0, sizeof(struct sockaddr_in));
+	sin_c.sin_family = AF_INET;
+#ifdef HAVE_SIN_LEN
+	sin_c.sin_len = sizeof(struct sockaddr_in);
+#endif
+	sin_c.sin_port = htons(9899);
+	sin_c.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+	memset(&sin_s, 0, sizeof(struct sockaddr_in));
+	sin_s.sin_family = AF_INET;
+#ifdef HAVE_SIN_LEN
+	sin_s.sin_len = sizeof(struct sockaddr_in);
+#endif
+	sin_s.sin_port = htons(9901);
+	sin_s.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+#ifdef _WIN32
+	if (bind(fd_c, (struct sockaddr *)&sin_c, sizeof(struct sockaddr_in)) == SOCKET_ERROR) {
+		printf("bind() failed with error: %d\n", WSAGetLastError());
+		exit(EXIT_FAILURE);
+	}
+	if (bind(fd_s, (struct sockaddr *)&sin_s, sizeof(struct sockaddr_in)) == SOCKET_ERROR) {
+		printf("bind() failed with error: %d\n", WSAGetLastError());
+		exit(EXIT_FAILURE);
+	}
+#else
+	if (bind(fd_c, (struct sockaddr *)&sin_c, sizeof(struct sockaddr_in)) < 0) {
+		perror("bind");
+		exit(EXIT_FAILURE);
+	}
+	if (bind(fd_s, (struct sockaddr *)&sin_s, sizeof(struct sockaddr_in)) < 0) {
+		perror("bind");
+		exit(EXIT_FAILURE);
+	}
+#endif
+#ifdef _WIN32
+	if (connect(fd_c, (struct sockaddr *)&sin_s, sizeof(struct sockaddr_in)) == SOCKET_ERROR) {
+		printf("connect() failed with error: %d\n", WSAGetLastError());
+		exit(EXIT_FAILURE);
+	}
+	if (connect(fd_s, (struct sockaddr *)&sin_c, sizeof(struct sockaddr_in)) == SOCKET_ERROR) {
+		printf("connect() failed with error: %d\n", WSAGetLastError());
+		exit(EXIT_FAILURE);
+	}
+#else
+	if (connect(fd_c, (struct sockaddr *)&sin_s, sizeof(struct sockaddr_in)) < 0) {
+		perror("connect");
+		exit(EXIT_FAILURE);
+	}
+	if (connect(fd_s, (struct sockaddr *)&sin_c, sizeof(struct sockaddr_in)) < 0) {
+		perror("connect");
+		exit(EXIT_FAILURE);
+	}
+#endif
+#ifdef _WIN32
+	tid_c = CreateThread(NULL, 0, &handle_packets, (void *)&fd_c, 0, NULL);
+	tid_s = CreateThread(NULL, 0, &handle_packets, (void *)&fd_s, 0, NULL);
+#else
+	if (pthread_create(&tid_c, NULL, &handle_packets, (void *)&fd_c)) {
+		perror("pthread_create tid_c");
+		exit(EXIT_FAILURE);
+	}
+
+	if (pthread_create(&tid_s, NULL, &handle_packets, (void *)&fd_s)) {
+		perror("pthread_create tid_s");
+		exit(EXIT_FAILURE);
+	};
+#endif
+#ifdef SCTP_DEBUG
+	usrsctp_sysctl_set_sctp_debug_on(SCTP_DEBUG_ALL);
+#endif
+	usrsctp_sysctl_set_sctp_ecn_enable(0);
+	usrsctp_register_address((void *)&fd_c);
+	usrsctp_register_address((void *)&fd_s);
+	if ((s_c = usrsctp_socket(AF_CONN, SOCK_STREAM, IPPROTO_SCTP, receive_cb, NULL, 0, &fd_c)) == NULL) {
+		perror("usrsctp_socket");
+		exit(EXIT_FAILURE);
+	}
+	opt_len = (socklen_t)sizeof(int);
+	cur_buf_size = 0;
+	if (usrsctp_getsockopt(s_c, SOL_SOCKET, SO_SNDBUF, &cur_buf_size, &opt_len) < 0) {
+		perror("usrsctp_getsockopt");
+		exit(EXIT_FAILURE);
+	}
+	printf("Change send socket buffer size from %d ", cur_buf_size);
+	snd_buf_size = 1<<20; /* 1 MB */
+	if (usrsctp_setsockopt(s_c, SOL_SOCKET, SO_SNDBUF, &snd_buf_size, sizeof(int)) < 0) {
+		perror("usrsctp_setsockopt");
+		exit(EXIT_FAILURE);
+	}
+	opt_len = (socklen_t)sizeof(int);
+	cur_buf_size = 0;
+	if (usrsctp_getsockopt(s_c, SOL_SOCKET, SO_SNDBUF, &cur_buf_size, &opt_len) < 0) {
+		perror("usrsctp_getsockopt");
+		exit(EXIT_FAILURE);
+	}
+	printf("to %d.\n", cur_buf_size);
+	if ((s_l = usrsctp_socket(AF_CONN, SOCK_STREAM, IPPROTO_SCTP, receive_cb, NULL, 0, &fd_s)) == NULL) {
+		perror("usrsctp_socket");
+		exit(EXIT_FAILURE);
+	}
+	opt_len = (socklen_t)sizeof(int);
+	cur_buf_size = 0;
+	if (usrsctp_getsockopt(s_l, SOL_SOCKET, SO_RCVBUF, &cur_buf_size, &opt_len) < 0) {
+		perror("usrsctp_getsockopt");
+		exit(EXIT_FAILURE);
+	}
+	printf("Change receive socket buffer size from %d ", cur_buf_size);
+	rcv_buf_size = 1<<16; /* 64 KB */
+	if (usrsctp_setsockopt(s_l, SOL_SOCKET, SO_RCVBUF, &rcv_buf_size, sizeof(int)) < 0) {
+		perror("usrsctp_setsockopt");
+		exit(EXIT_FAILURE);
+	}
+	opt_len = (socklen_t)sizeof(int);
+	cur_buf_size = 0;
+	if (usrsctp_getsockopt(s_l, SOL_SOCKET, SO_RCVBUF, &cur_buf_size, &opt_len) < 0) {
+		perror("usrsctp_getsockopt");
+		exit(EXIT_FAILURE);
+	}
+	printf("to %d.\n", cur_buf_size);
+	/* Bind the client side. */
+	memset(&sconn, 0, sizeof(struct sockaddr_conn));
+	sconn.sconn_family = AF_CONN;
+#ifdef HAVE_SCONN_LEN
+	sconn.sconn_len = sizeof(struct sockaddr_conn);
+#endif
+	sconn.sconn_port = htons(5001);
+	sconn.sconn_addr = &fd_c;
+	if (usrsctp_bind(s_c, (struct sockaddr *)&sconn, sizeof(struct sockaddr_conn)) < 0) {
+		perror("usrsctp_bind");
+		exit(EXIT_FAILURE);
+	}
+	/* Bind the server side. */
+	memset(&sconn, 0, sizeof(struct sockaddr_conn));
+	sconn.sconn_family = AF_CONN;
+#ifdef HAVE_SCONN_LEN
+	sconn.sconn_len = sizeof(struct sockaddr_conn);
+#endif
+	sconn.sconn_port = htons(5001);
+	sconn.sconn_addr = &fd_s;
+	if (usrsctp_bind(s_l, (struct sockaddr *)&sconn, sizeof(struct sockaddr_conn)) < 0) {
+		perror("usrsctp_bind");
+		exit(EXIT_FAILURE);
+	}
+	/* Make server side passive... */
+	if (usrsctp_listen(s_l, 1) < 0) {
+		perror("usrsctp_listen");
+		exit(EXIT_FAILURE);
+	}
+	/* Initiate the handshake */
+	memset(&sconn, 0, sizeof(struct sockaddr_conn));
+	sconn.sconn_family = AF_CONN;
+#ifdef HAVE_SCONN_LEN
+	sconn.sconn_len = sizeof(struct sockaddr_conn);
+#endif
+	sconn.sconn_port = htons(5001);
+	sconn.sconn_addr = &fd_c;
+	if (usrsctp_connect(s_c, (struct sockaddr *)&sconn, sizeof(struct sockaddr_conn)) < 0) {
+		perror("usrsctp_connect");
+		exit(EXIT_FAILURE);
+	}
+	if ((s_s = usrsctp_accept(s_l, NULL, NULL)) == NULL) {
+		perror("usrsctp_accept");
+		exit(EXIT_FAILURE);
+	}
+	usrsctp_close(s_l);
+	if ((line = malloc(LINE_LENGTH)) == NULL) {
+		exit(EXIT_FAILURE);
+	}
+	memset(line, 'A', LINE_LENGTH);
+	sndinfo.snd_sid = 1;
+	sndinfo.snd_flags = 0;
+	sndinfo.snd_ppid = htonl(DISCARD_PPID);
+	sndinfo.snd_context = 0;
+	sndinfo.snd_assoc_id = 0;
+	/* Send a 1 MB message */
+	if (usrsctp_sendv(s_c, line, LINE_LENGTH, NULL, 0, (void *)&sndinfo,
+	                 (socklen_t)sizeof(struct sctp_sndinfo), SCTP_SENDV_SNDINFO, 0) < 0) {
+		perror("usrsctp_sendv");
+		exit(EXIT_FAILURE);
+	}
+	free(line);
+	usrsctp_shutdown(s_c, SHUT_WR);
+
+	while (usrsctp_finish() != 0) {
+#ifdef _WIN32
+		Sleep(1000);
+#else
+		sleep(1);
+#endif
+	}
+#ifdef _WIN32
+	TerminateThread(tid_c, 0);
+	WaitForSingleObject(tid_c, INFINITE);
+	TerminateThread(tid_s, 0);
+	WaitForSingleObject(tid_s, INFINITE);
+	if (closesocket(fd_c) == SOCKET_ERROR) {
+		printf("closesocket() failed with error: %d\n", WSAGetLastError());
+		exit(EXIT_FAILURE);
+	}
+	if (closesocket(fd_s) == SOCKET_ERROR) {
+		printf("closesocket() failed with error: %d\n", WSAGetLastError());
+		exit(EXIT_FAILURE);
+	}
+	WSACleanup();
+#else
+	pthread_cancel(tid_c);
+	pthread_join(tid_c, NULL);
+	pthread_cancel(tid_s);
+	pthread_join(tid_s, NULL);
+	if (close(fd_c) < 0) {
+		perror("close");
+		exit(EXIT_FAILURE);
+	}
+	if (close(fd_s) < 0) {
+		perror("close");
+		exit(EXIT_FAILURE);
+	}
+#endif
+	return (0);
+}