Virgin import of ISC-DHCP v2.0

1 files changed, 110 insertions, 0 deletions

diff --git a/contrib/isc-dhcp/common/ethernet.c b/contrib/isc-dhcp/common/ethernet.c
new file mode 100644
index 000000000000..311c3c9af714
--- /dev/null
+++ b/contrib/isc-dhcp/common/ethernet.c
@@ -0,0 +1,110 @@
+/* packet.c
+
+   Packet assembly code, originally contributed by Archie Cobbs. */
+
+/*
+ * Copyright (c) 1995, 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''.
+ */
+
+#ifndef lint
+static char copyright[] =
+"$Id: ethernet.c,v 1.1.2.1 1999/05/27 17:35:47 mellon Exp $ Copyright (c) 1996 The Internet Software Consortium.  All rights reserved.\n";
+#endif /* not lint */
+
+#include "dhcpd.h"
+
+#if defined (PACKET_ASSEMBLY) || defined (PACKET_DECODING)
+#include "includes/netinet/if_ether.h"
+#endif /* PACKET_ASSEMBLY || PACKET_DECODING */
+
+#if defined (PACKET_ASSEMBLY)
+/* Assemble an hardware header... */
+/* XXX currently only supports ethernet; doesn't check for other types. */
+
+void assemble_ethernet_header (interface, buf, bufix, to)
+	struct interface_info *interface;
+	unsigned char *buf;
+	int *bufix;
+	struct hardware *to;
+{
+	struct ether_header eh;
+
+	if (to && to -> hlen == 6) /* XXX */
+		memcpy (eh.ether_dhost, to -> haddr, sizeof eh.ether_dhost);
+	else
+		memset (eh.ether_dhost, 0xff, sizeof (eh.ether_dhost));
+	if (interface -> hw_address.hlen == sizeof (eh.ether_shost))
+		memcpy (eh.ether_shost, interface -> hw_address.haddr,
+			sizeof (eh.ether_shost));
+	else
+		memset (eh.ether_shost, 0x00, sizeof (eh.ether_shost));
+
+#ifdef BROKEN_FREEBSD_BPF /* Fixed in FreeBSD 2.2 */
+	eh.ether_type = ETHERTYPE_IP;
+#else
+	eh.ether_type = htons (ETHERTYPE_IP);
+#endif
+
+	memcpy (&buf [*bufix], &eh, sizeof eh);
+	*bufix += sizeof eh;
+}
+#endif /* PACKET_ASSEMBLY */
+
+#ifdef PACKET_DECODING
+/* Decode a hardware header... */
+
+ssize_t decode_ethernet_header (interface, buf, bufix, from)
+     struct interface_info *interface;
+     unsigned char *buf;
+     int bufix;
+     struct hardware *from;
+{
+  struct ether_header eh;
+
+  memcpy (&eh, buf + bufix, sizeof eh);
+
+#ifdef USERLAND_FILTER
+  if (ntohs (eh.ether_type) != ETHERTYPE_IP)
+	  return -1;
+#endif
+  memcpy (from -> haddr, eh.ether_shost, sizeof (eh.ether_shost));
+  from -> htype = ARPHRD_ETHER;
+  from -> hlen = sizeof eh.ether_shost;
+
+  return sizeof eh;
+}
+#endif /* PACKET_DECODING */