Import the OpenBSD dhclient as shipped with OpenBSD-3.7 (the tag

OPENBSD_3_7).

1 files changed, 118 insertions, 0 deletions

diff --git a/sbin/dhclient/inet.c b/sbin/dhclient/inet.c
new file mode 100644
index 0000000..a528475
--- /dev/null
+++ b/sbin/dhclient/inet.c
@@ -0,0 +1,118 @@
+/*	$OpenBSD: inet.c,v 1.7 2004/05/04 21:48:16 deraadt Exp $	*/
+
+/*
+ * Subroutines to manipulate internet addresses in a safely portable
+ * way...
+ */
+
+/*
+ * Copyright (c) 1996 The Internet Software Consortium.  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 Internet Software Consortium 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 INTERNET SOFTWARE CONSORTIUM 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 INTERNET SOFTWARE CONSORTIUM 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.
+ *
+ * This software has been written for the Internet Software Consortium
+ * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
+ * Enterprises.  To learn more about the Internet Software Consortium,
+ * see ``http://www.vix.com/isc''.  To learn more about Vixie
+ * Enterprises, see ``http://www.vix.com''.
+ */
+
+#include "dhcpd.h"
+
+/*
+ * Return just the network number of an internet address...
+ */
+struct iaddr
+subnet_number(struct iaddr addr, struct iaddr mask)
+{
+	struct iaddr rv;
+	int i;
+
+	rv.len = 0;
+
+	/* Both addresses must have the same length... */
+	if (addr.len != mask.len)
+		return (rv);
+
+	rv.len = addr.len;
+	for (i = 0; i < rv.len; i++)
+		rv.iabuf[i] = addr.iabuf[i] & mask.iabuf[i];
+	return (rv);
+}
+
+/*
+ * Given a subnet number and netmask, return the address on that subnet
+ * for which the host portion of the address is all ones (the standard
+ * broadcast address).
+ */
+struct iaddr
+broadcast_addr(struct iaddr subnet, struct iaddr mask)
+{
+	struct iaddr rv;
+	int i;
+
+	if (subnet.len != mask.len) {
+		rv.len = 0;
+		return (rv);
+	}
+
+	for (i = 0; i < subnet.len; i++)
+		rv.iabuf[i] = subnet.iabuf[i] | (~mask.iabuf[i] & 255);
+	rv.len = subnet.len;
+
+	return (rv);
+}
+
+int
+addr_eq(struct iaddr addr1, struct iaddr addr2)
+{
+	if (addr1.len != addr2.len)
+		return (0);
+	return (memcmp(addr1.iabuf, addr2.iabuf, addr1.len) == 0);
+}
+
+char *
+piaddr(struct iaddr addr)
+{
+	static char pbuf[32];
+	struct in_addr a;
+	char *s;
+
+	memcpy(&a, &(addr.iabuf), sizeof(struct in_addr));
+
+	if (addr.len == 0)
+		strlcpy(pbuf, "<null address>", sizeof(pbuf));
+	else {
+		s = inet_ntoa(a);
+		if (s != NULL)
+			strlcpy(pbuf, s, sizeof(pbuf));
+		else
+			strlcpy(pbuf, "<invalid address>", sizeof(pbuf));
+	}
+	return (pbuf);
+}