vendor/isc-dhcp/2.0pl3_fix

1 files changed, 0 insertions, 321 deletions

diff --git a/contrib/isc-dhcp/common/packet.c b/contrib/isc-dhcp/common/packet.c
deleted file mode 100644
index 6a15fcf1e4df..000000000000
--- a/contrib/isc-dhcp/common/packet.c
+++ /dev/null
@@ -1,321 +0,0 @@
-/* packet.c
-
-   Packet assembly code, originally contributed by Archie Cobbs. */
-
-/*
- * Copyright (c) 1995, 1996, 1999 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: packet.c,v 1.18.2.6 1999/06/10 00:58:16 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/ip.h"
-#include "includes/netinet/udp.h"
-#endif /* PACKET_ASSEMBLY || PACKET_DECODING */
-
-/* Compute the easy part of the checksum on a range of bytes. */
-
-u_int32_t checksum (buf, nbytes, sum)
-	unsigned char *buf;
-	int nbytes;
-	u_int32_t sum;
-{
-	int i;
-
-#ifdef DEBUG_CHECKSUM
-	debug ("checksum (%x %d %x)", buf, nbytes, sum);
-#endif
-
-	/* Checksum all the pairs of bytes first... */
-	for (i = 0; i < (nbytes & ~1); i += 2) {
-#ifdef DEBUG_CHECKSUM_VERBOSE
-		debug ("sum = %x", sum);
-#endif
-		sum += (u_int16_t) ntohs(*((u_int16_t *)(buf + i)));
-		/* Add carry. */
-		if (sum > 0xFFFF)
-			sum -= 0xFFFF;
-	}	
-
-	/* If there's a single byte left over, checksum it, too.   Network
-	   byte order is big-endian, so the remaining byte is the high byte. */
-	if (i < nbytes) {
-#ifdef DEBUG_CHECKSUM_VERBOSE
-		debug ("sum = %x", sum);
-#endif
-		sum += buf [i] << 8;
-		/* Add carry. */
-		if (sum > 0xFFFF)
-			sum -= 0xFFFF;
-	}
-	
-	return sum;
-}
-
-/* Finish computing the sum, and then put it into network byte order. */
-
-u_int32_t wrapsum (sum)
-	u_int32_t sum;
-{
-#ifdef DEBUG_CHECKSUM
-	debug ("wrapsum (%x)", sum);
-#endif
-
-	sum = ~sum & 0xFFFF;
-#ifdef DEBUG_CHECKSUM_VERBOSE
-	debug ("sum = %x", sum);
-#endif
-	
-#ifdef DEBUG_CHECKSUM
-	debug ("wrapsum returns %x", htons (sum));
-#endif
-	return htons(sum);
-}
-
-#ifdef PACKET_ASSEMBLY
-/* Assemble an hardware header... */
-/* XXX currently only supports ethernet; doesn't check for other types. */
-
-void assemble_hw_header (interface, buf, bufix, to)
-	struct interface_info *interface;
-	unsigned char *buf;
-	int *bufix;
-	struct hardware *to;
-{
-#if defined (HAVE_TR_SUPPORT)
-	if (interface -> hw_address.htype == HTYPE_IEEE802)
-		assemble_tr_header (interface, buf, bufix, to);
-	else
-#endif
-		assemble_ethernet_header (interface, buf, bufix, to);
-
-}
-
-/* UDP header and IP header assembled together for convenience. */
-
-void assemble_udp_ip_header (interface, buf, bufix,
-			     from, to, port, data, len)
-	struct interface_info *interface;
-	unsigned char *buf;
-	int *bufix;
-	u_int32_t from;
-	u_int32_t to;
-	unsigned int port;
-	unsigned char *data;
-	int len;
-{
-	struct ip ip;
-	struct udphdr udp;
-
-	/* Fill out the IP header */
-	ip.ip_v = 4;
-	ip.ip_hl = 5;
-	ip.ip_tos = IPTOS_LOWDELAY;
-	ip.ip_len = htons(sizeof(ip) + sizeof(udp) + len);
-	ip.ip_id = 0;
-	ip.ip_off = 0;
-	ip.ip_ttl = 16;
-	ip.ip_p = IPPROTO_UDP;
-	ip.ip_sum = 0;
-	ip.ip_src.s_addr = from;
-	ip.ip_dst.s_addr = to;
-	
-	/* Checksum the IP header... */
-	ip.ip_sum = wrapsum (checksum ((unsigned char *)&ip, sizeof ip, 0));
-	
-	/* Copy the ip header into the buffer... */
-	memcpy (&buf [*bufix], &ip, sizeof ip);
-	*bufix += sizeof ip;
-
-	/* Fill out the UDP header */
-	udp.uh_sport = local_port;		/* XXX */
-	udp.uh_dport = port;			/* XXX */
-	udp.uh_ulen = htons(sizeof(udp) + len);
-	memset (&udp.uh_sum, 0, sizeof udp.uh_sum);
-
-	/* Compute UDP checksums, including the ``pseudo-header'', the UDP
-	   header and the data. */
-
-	udp.uh_sum =
-		wrapsum (checksum ((unsigned char *)&udp, sizeof udp,
-				   checksum (data, len, 
-					     checksum ((unsigned char *)
-						       &ip.ip_src,
-						       2 * sizeof ip.ip_src,
-						       IPPROTO_UDP +
-						       (u_int32_t)
-						       ntohs (udp.uh_ulen)))));
-
-	/* Copy the udp header into the buffer... */
-	memcpy (&buf [*bufix], &udp, sizeof udp);
-	*bufix += sizeof udp;
-}
-#endif /* PACKET_ASSEMBLY */
-
-#ifdef PACKET_DECODING
-/* Decode a hardware header... */
-
-ssize_t decode_hw_header (interface, buf, bufix, from)
-     struct interface_info *interface;
-     unsigned char *buf;
-     int bufix;
-     struct hardware *from;
-{
-#if defined (HAVE_TR_SUPPORT)
-	if (interface -> hw_address.htype == HTYPE_IEEE802)
-		return decode_tr_header (interface, buf, bufix, from);
-	else
-#endif
-		return decode_ethernet_header (interface, buf, bufix, from);
-}
-
-/* UDP header and IP header decoded together for convenience. */
-
-ssize_t decode_udp_ip_header (interface, buf, bufix, from, data, buflen)
-	struct interface_info *interface;
-	unsigned char *buf;
-	int bufix;
-	struct sockaddr_in *from;
-	unsigned char *data;
-	int buflen;
-{
-  struct ip *ip;
-  struct udphdr *udp;
-  u_int32_t ip_len = (buf [bufix] & 0xf) << 2;
-  u_int32_t sum, usum;
-  static int ip_packets_seen;
-  static int ip_packets_bad_checksum;
-  static int udp_packets_seen;
-  static int udp_packets_bad_checksum;
-  static int udp_packets_length_checked;
-  static int udp_packets_length_overflow;
-  int len;
-
-  ip = (struct ip *)(buf + bufix);
-  udp = (struct udphdr *)(buf + bufix + ip_len);
-
-#ifdef USERLAND_FILTER
-  /* Is it a UDP packet? */
-  if (ip -> ip_p != IPPROTO_UDP)
-	  return -1;
-
-  /* Is it to the port we're serving? */
-  if (udp -> uh_dport != local_port)
-	  return -1;
-#endif /* USERLAND_FILTER */
-
-  /* Check the IP header checksum - it should be zero. */
-  ++ip_packets_seen;
-  if (wrapsum (checksum (buf + bufix, ip_len, 0))) {
-	  ++ip_packets_bad_checksum;
-	  if (ip_packets_seen > 4 &&
-	      (ip_packets_seen / ip_packets_bad_checksum) < 2) {
-		  note ("%d bad IP checksums seen in %d packets",
-			ip_packets_bad_checksum, ip_packets_seen);
-		  ip_packets_seen = ip_packets_bad_checksum = 0;
-	  }
-	  return -1;
-  }
-
-  /* Check the IP packet length. */
-  if (ntohs (ip -> ip_len) != buflen)
-	  debug ("ip length %d disagrees with bytes received %d.",
-		 ntohs (ip -> ip_len), buflen);
-
-  /* Copy out the IP source address... */
-  memcpy (&from -> sin_addr, &ip -> ip_src, 4);
-
-  /* Compute UDP checksums, including the ``pseudo-header'', the UDP
-     header and the data.   If the UDP checksum field is zero, we're
-     not supposed to do a checksum. */
-
-  if (!data) {
-	  data = buf + bufix + ip_len + sizeof *udp;
-	  len = ntohs (udp -> uh_ulen) - sizeof *udp;
-	  ++udp_packets_length_checked;
-	  if (len + data > buf + bufix + buflen) {
-		  ++udp_packets_length_overflow;
-		  if (udp_packets_length_checked > 4 &&
-		      (udp_packets_length_checked /
-		       udp_packets_length_overflow) < 2) {
-			  note ("%d udp packets in %d too long - dropped",
-				udp_packets_length_overflow,
-				udp_packets_length_checked);
-			  udp_packets_length_overflow =
-				  udp_packets_length_checked = 0;
-		  }
-		  return -1;
-	  }
-	  if (len + data != buf + bufix + buflen)
-		  debug ("accepting packet with data after udp payload.");
-  }
-
-  usum = udp -> uh_sum;
-  udp -> uh_sum = 0;
-
-  sum = wrapsum (checksum ((unsigned char *)udp, sizeof *udp,
-			   checksum (data, len,
-				     checksum ((unsigned char *)
-					       &ip -> ip_src,
-					       2 * sizeof ip -> ip_src,
-					       IPPROTO_UDP +
-					       (u_int32_t)
-					       ntohs (udp -> uh_ulen)))));
-
-  udp_packets_seen++;
-  if (usum && usum != sum) {
-	  udp_packets_bad_checksum++;
-	  if (udp_packets_seen > 4 &&
-	      (udp_packets_seen / udp_packets_bad_checksum) < 2) {
-		  note ("%d bad udp checksums in %d packets",
-			udp_packets_bad_checksum, udp_packets_seen);
-		  udp_packets_seen = udp_packets_bad_checksum = 0;
-	  }
-	  return -1;
-  }
-
-  /* Copy out the port... */
-  memcpy (&from -> sin_port, &udp -> uh_sport, sizeof udp -> uh_sport);
-
-  return ip_len + sizeof *udp;
-}
-#endif /* PACKET_DECODING */