diff --git a/usrsctplib/user_environment.c b/usrsctplib/user_environment.c
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+++ b/usrsctplib/user_environment.c
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+/*-
+ * Copyright (c) 2009-2010 Brad Penoff
+ * Copyright (c) 2009-2010 Humaira Kamal
+ * Copyright (c) 2011-2012 Irene Ruengeler
+ * Copyright (c) 2011-2012 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ */
+
+/* __Userspace__ */
+
+#include <stdlib.h>
+#if !defined (__Userspace_os_Windows)
+#include <stdint.h>
+#include <netinet/sctp_os_userspace.h>
+#endif
+#include <user_environment.h>
+#include <sys/types.h>
+/* #include <sys/param.h> defines MIN */
+#if !defined(MIN)
+#define MIN(arg1,arg2) ((arg1) < (arg2) ? (arg1) : (arg2))
+#endif
+#include <string.h>
+
+#define uHZ 1000
+
+/* See user_include/user_environment.h for comments about these variables */
+int maxsockets = 25600;
+int hz = uHZ;
+int ip_defttl = 64;
+int ipport_firstauto = 49152, ipport_lastauto = 65535;
+int nmbclusters = 65536;
+
+/* Source ip_output.c. extern'd in ip_var.h */
+u_short ip_id = 0; /*__Userspace__ TODO Should it be initialized to zero? */
+
+/* used in user_include/user_atomic.h in order to make the operations
+ * defined there truly atomic
+ */
+userland_mutex_t atomic_mtx;
+
+/* Source: /usr/src/sys/dev/random/harvest.c */
+static int read_random_phony(void *, int);
+
+static int (*read_func)(void *, int) = read_random_phony;
+
+/* Userland-visible version of read_random */
+int
+read_random(void *buf, int count)
+{
+	return ((*read_func)(buf, count));
+}
+
+/* If the entropy device is not loaded, make a token effort to
+ * provide _some_ kind of randomness. This should only be used
+ * inside other RNG's, like arc4random(9).
+ */
+static int
+read_random_phony(void *buf, int count)
+{
+	uint32_t randval;
+	int size, i;
+
+	/* srandom() is called in kern/init_main.c:proc0_post() */
+
+	/* Fill buf[] with random(9) output */
+	for (i = 0; i < count; i+= (int)sizeof(uint32_t)) {
+		randval = random();
+		size = MIN(count - i, (int)sizeof(uint32_t));
+		memcpy(&((char *)buf)[i], &randval, (size_t)size);
+	}
+
+	return (count);
+}
+