diff --git a/src/lib/opt_info.c b/src/lib/opt_info.c
new file mode 100644
index 0000000..21c8307
--- /dev/null
+++ b/src/lib/opt_info.c
@@ -0,0 +1,62 @@
+/* SCTP kernel Implementation: User API extensions.
+ *
+ * opt_info.c
+ *
+ * Distributed under the terms of the LGPL v2.1 as described in
+ *    http://www.gnu.org/copyleft/lesser.txt 
+ *
+ * This file is part of the user library that offers support for the
+ * SCTP kernel Implementation. The main purpose of this
+ * code if to provide the SCTP Socket API mappings for user
+ * application to interface with the SCTP in kernel.
+ *
+ * This implementation is based on the Socket API Extensions for SCTP
+ * defined in <draft-ietf-tsvwg-sctpsocket-10.txt.
+ *
+ * (C) Copyright IBM Corp. 2003
+ * Copyright (c) 2002 Intel Corporation.
+ *
+ * Written or modified by:
+ *   Ardelle Fan <ardelle.fan@intel.com>
+ */
+
+#include <sys/socket.h>   /* struct sockaddr_storage, setsockopt() */
+#include <netinet/sctp.h> /* SCTP_SOCKOPT_BINDX_* */
+#include <errno.h>
+
+/* Support the sctp_opt_info() interface.
+ *
+ * See Sockets API Extensions for SCTP. Section 7.
+ *
+ * Pass sctp option information pass both in to and out of the SCTP stack.
+ * This is a new SCTP API described in the section 7 of the Sockets API
+ * Extensions for SCTP. This is implemented using the getsockopt() interface.
+ */
+int
+sctp_opt_info(int sd, sctp_assoc_t id, int opt, void *arg, socklen_t *size)
+{
+	switch (opt) {
+	case SCTP_RTOINFO:
+	case SCTP_ASSOCINFO:
+	case SCTP_INITMSG:
+	case SCTP_NODELAY:
+	case SCTP_AUTOCLOSE:
+	case SCTP_PRIMARY_ADDR:
+	case SCTP_DISABLE_FRAGMENTS:
+	case SCTP_PEER_ADDR_PARAMS:
+	case SCTP_DEFAULT_SEND_PARAM:
+	case SCTP_EVENTS:
+	case SCTP_I_WANT_MAPPED_V4_ADDR:
+	case SCTP_MAXSEG:
+	case SCTP_STATUS:
+	case SCTP_GET_PEER_ADDR_INFO:
+	case SCTP_AUTH_ACTIVE_KEY:
+	case SCTP_PEER_AUTH_CHUNKS:
+	case SCTP_LOCAL_AUTH_CHUNKS:
+		*(sctp_assoc_t *)arg = id;
+		return getsockopt(sd, IPPROTO_SCTP, opt, arg, size);
+	default:
+		return ENOTSUP;
+	}
+
+} /* sctp_opt_info() */