commit d95ac554fb5cd7ed48a4cb1768cc102e0b002c12
Author: Isaac Dunham <idunham@lavabit.com>
Date:   Mon Nov 19 21:45:54 2012 -0800

    Add inet_makeaddr.
    
    This is a BSD network function which Samba wants.

diff --git a/include/arpa/inet.h b/include/arpa/inet.h
index 9293840..95f046e 100644
--- a/include/arpa/inet.h
+++ b/include/arpa/inet.h
@@ -29,6 +29,7 @@ int inet_pton (int, const char *__restrict, void *__restrict);
 const char *inet_ntop (int, const void *__restrict, char *__restrict, socklen_t);
 
 int inet_aton (const char *, struct in_addr *); /* nonstandard but widely used */
+struct in_addr inet_makeaddr (in_addr_t net, in_addr_t host);
 
 #undef INET_ADDRSTRLEN
 #undef INET6_ADDRSTRLEN
diff --git a/src/network/inet_makeaddr.c b/src/network/inet_makeaddr.c
new file mode 100644
index 0000000..e205168
--- /dev/null
+++ b/src/network/inet_makeaddr.c
@@ -0,0 +1,55 @@
+/*	$NetBSD: inet_makeaddr.c,v 1.1 2004/05/20 23:13:02 christos Exp $	*/
+
+/*
+ * Copyright (c) 1983, 1993
+ *	The Regents of the University of California.  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 University 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 REGENTS 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 REGENTS 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.
+ */
+
+#define _BSD_SOURCE
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+/*
+ * Formulate an Internet address from network + host.  Used in
+ * building addresses stored in the ifnet structure.
+ */
+struct in_addr inet_makeaddr(in_addr_t net, in_addr_t host)
+{
+	in_addr_t addr;
+	struct in_addr ret;
+
+	if (net < 128)
+		addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
+	else if (net < 65536)
+		addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
+	else if (net < 16777216L)
+		addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
+	else
+		addr = net | host;
+	ret.s_addr = htonl(addr);
+	return ret;
+}