From: adrian <>
Date: Sat, 16 Dec 2000 23:52:29 +0000 (+0000)
Subject: Add support for netfilter in linux-2.4 . netfilter changes the semantics
X-Git-Tag: SQUID_3_0_PRE1~1731
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=d852fbad7af321446880fb69077cb509e030e280;p=thirdparty%2Fsquid.git

Add support for netfilter in linux-2.4 . netfilter changes the semantics
of obtaining the target address of a redirected connection slightly -
it now requires a getsockopt(). Without this code, transparent requests
without a Host: header (ie HTTP/1.0) will not have enough information to
connect to the correct origin server.

The configure option is --enable-linux-netfilter. I don't think its
currently automatic (but then neither is ipf from memory.)

Submitted by: Evan Jones <ejones@netwinder.org>
---

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index cc65dd0473..39926b0642 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -73,6 +73,7 @@ and ideas to make this software available.
 	Adrian Chadd <adrian@creative.net.au>
 	Robert Collins <robert.collins@itdomain.com.au>
 	Brian Degenhardt <bmd@mp3.com>
+	Evan Jones <ejones@netwinder.org>
 
 Development of this caching software is funded by the National Science
 Foundation (grants NCR-9616602 and NCR-9521745).  Paid staff members on
diff --git a/ChangeLog b/ChangeLog
index ea1260d3ca..bf8fe39e0d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,10 @@ Changes to squid-2.5
 	  objects if it needs appending. This fixes weirdnesses where
 	  a machine can think it is "foo.bar.com", and "foo" is requested.
 	  (Brian Degenhardt)
+	- Added support for netfilter in linux-2.4. This allows transparent
+	  proxy connections to function correctly in the absence of a Host:
+	  header. This requires --enable-linux-netfilter to be passed through
+	  to configure. (Evan Jones)
 
 Changes to Squid-2.4.DEVEL4 ():
 
diff --git a/configure b/configure
index 7f60d658cd..2a4837e430 100755
--- a/configure
+++ b/configure
@@ -107,6 +107,9 @@ ac_help="$ac_help
   --enable-ipf-transparent
                           Enable Transparent Proxy support for systems
                           using IP-Filter network address redirection."
+ac_help="$ac_help
+  --enable-linux-netfilter
+                          Enable Transparent Proxy support for Linux 2.4."
 ac_help="$ac_help
   --enable-leakfinder
                           Enable Leak Finding code.  Enabling this alone
@@ -655,7 +658,7 @@ fi
 
 
 
-# From configure.in Revision
+# From configure.in Revision: 1.208 
 ac_aux_dir=
 for ac_dir in cfgaux $srcdir/cfgaux; do
   if test -f $ac_dir/install-sh; then
@@ -683,7 +686,7 @@ else { echo "configure: error: can not run $ac_config_sub" 1>&2; exit 1; }
 fi
 
 echo $ac_n "checking host system type""... $ac_c" 1>&6
-echo "configure:687: checking host system type" >&5
+echo "configure:690: checking host system type" >&5
 
 host_alias=$host
 case "$host_alias" in
@@ -752,7 +755,7 @@ PRESET_CFLAGS="$CFLAGS"
 # Extract the first word of "gcc", so it can be a program name with args.
 set dummy gcc; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:756: checking for $ac_word" >&5
+echo "configure:759: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -782,7 +785,7 @@ if test -z "$CC"; then
   # Extract the first word of "cc", so it can be a program name with args.
 set dummy cc; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:786: checking for $ac_word" >&5
+echo "configure:789: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -833,7 +836,7 @@ fi
       # Extract the first word of "cl", so it can be a program name with args.
 set dummy cl; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:837: checking for $ac_word" >&5
+echo "configure:840: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -865,7 +868,7 @@ fi
 fi
 
 echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works""... $ac_c" 1>&6
-echo "configure:869: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
+echo "configure:872: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
 
 ac_ext=c
 # CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
@@ -876,12 +879,12 @@ cross_compiling=$ac_cv_prog_cc_cross
 
 cat > conftest.$ac_ext << EOF
 
-#line 880 "configure"
+#line 883 "configure"
 #include "confdefs.h"
 
 main(){return(0);}
 EOF
-if { (eval echo configure:885: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:888: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   ac_cv_prog_cc_works=yes
   # If we can't run a trivial program, we are probably using a cross compiler.
   if (./conftest; exit) 2>/dev/null; then
@@ -907,12 +910,12 @@ if test $ac_cv_prog_cc_works = no; then
   { echo "configure: error: installation or configuration problem: C compiler cannot create executables." 1>&2; exit 1; }
 fi
 echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler""... $ac_c" 1>&6
-echo "configure:911: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
+echo "configure:914: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
 echo "$ac_t""$ac_cv_prog_cc_cross" 1>&6
 cross_compiling=$ac_cv_prog_cc_cross
 
 echo $ac_n "checking whether we are using GNU C""... $ac_c" 1>&6
-echo "configure:916: checking whether we are using GNU C" >&5
+echo "configure:919: checking whether we are using GNU C" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_gcc'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -921,7 +924,7 @@ else
   yes;
 #endif
 EOF
-if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:925: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
+if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:928: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
   ac_cv_prog_gcc=yes
 else
   ac_cv_prog_gcc=no
@@ -940,7 +943,7 @@ ac_test_CFLAGS="${CFLAGS+set}"
 ac_save_CFLAGS="$CFLAGS"
 CFLAGS=
 echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6
-echo "configure:944: checking whether ${CC-cc} accepts -g" >&5
+echo "configure:947: checking whether ${CC-cc} accepts -g" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_cc_g'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1628,6 +1631,21 @@ EOF
 fi
 
 
+# Check whether --enable-linux-netfilter or --disable-linux-netfilter was given.
+if test "${enable_linux_netfilter+set}" = set; then
+  enableval="$enable_linux_netfilter"
+   if test "$enableval" = "yes" ; then
+	echo "Linux-Netfilter Transparent Proxy enabled"
+	cat >> confdefs.h <<\EOF
+#define LINUX_NETFILTER 1
+EOF
+
+	LINUX_NETFILTER="yes"
+  fi
+
+fi
+
+
 # Check whether --enable-leakfinder or --disable-leakfinder was given.
 if test "${enable_leakfinder+set}" = set; then
   enableval="$enable_leakfinder"
@@ -1810,7 +1828,7 @@ case "$host" in
 esac
 
 echo $ac_n "checking how to run the C preprocessor""... $ac_c" 1>&6
-echo "configure:1814: checking how to run the C preprocessor" >&5
+echo "configure:1832: checking how to run the C preprocessor" >&5
 # On Suns, sometimes $CPP names a directory.
 if test -n "$CPP" && test -d "$CPP"; then
   CPP=
@@ -1825,13 +1843,13 @@ else
   # On the NeXT, cc -E runs the code through the compiler's parser,
   # not just through cpp.
   cat > conftest.$ac_ext <<EOF
-#line 1829 "configure"
+#line 1847 "configure"
 #include "confdefs.h"
 #include <assert.h>
 Syntax Error
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1835: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1853: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   :
@@ -1842,13 +1860,13 @@ else
   rm -rf conftest*
   CPP="${CC-cc} -E -traditional-cpp"
   cat > conftest.$ac_ext <<EOF
-#line 1846 "configure"
+#line 1864 "configure"
 #include "confdefs.h"
 #include <assert.h>
 Syntax Error
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1852: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1870: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   :
@@ -1859,13 +1877,13 @@ else
   rm -rf conftest*
   CPP="${CC-cc} -nologo -E"
   cat > conftest.$ac_ext <<EOF
-#line 1863 "configure"
+#line 1881 "configure"
 #include "confdefs.h"
 #include <assert.h>
 Syntax Error
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1869: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1887: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   :
@@ -1901,7 +1919,7 @@ echo "$ac_t""$CPP" 1>&6
 # SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
 # ./install, which can be erroneously created by make from ./install.sh.
 echo $ac_n "checking for a BSD compatible install""... $ac_c" 1>&6
-echo "configure:1905: checking for a BSD compatible install" >&5
+echo "configure:1923: checking for a BSD compatible install" >&5
 if test -z "$INSTALL"; then
 if eval "test \"`echo '$''{'ac_cv_path_install'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -1956,7 +1974,7 @@ test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
 # Extract the first word of "ranlib", so it can be a program name with args.
 set dummy ranlib; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1960: checking for $ac_word" >&5
+echo "configure:1978: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_RANLIB'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1984,7 +2002,7 @@ else
 fi
 
 echo $ac_n "checking whether ln -s works""... $ac_c" 1>&6
-echo "configure:1988: checking whether ln -s works" >&5
+echo "configure:2006: checking whether ln -s works" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_LN_S'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2007,7 +2025,7 @@ fi
 # Extract the first word of "sh", so it can be a program name with args.
 set dummy sh; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2011: checking for $ac_word" >&5
+echo "configure:2029: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_path_SH'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2043,7 +2061,7 @@ fi
 # Extract the first word of "false", so it can be a program name with args.
 set dummy false; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2047: checking for $ac_word" >&5
+echo "configure:2065: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_path_FALSE'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2079,7 +2097,7 @@ fi
 # Extract the first word of "true", so it can be a program name with args.
 set dummy true; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2083: checking for $ac_word" >&5
+echo "configure:2101: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_path_TRUE'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2115,7 +2133,7 @@ fi
 # Extract the first word of "rm", so it can be a program name with args.
 set dummy rm; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2119: checking for $ac_word" >&5
+echo "configure:2137: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_path_RM'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2151,7 +2169,7 @@ fi
 # Extract the first word of "mv", so it can be a program name with args.
 set dummy mv; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2155: checking for $ac_word" >&5
+echo "configure:2173: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_path_MV'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2187,7 +2205,7 @@ fi
 # Extract the first word of "mkdir", so it can be a program name with args.
 set dummy mkdir; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2191: checking for $ac_word" >&5
+echo "configure:2209: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_path_MKDIR'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2223,7 +2241,7 @@ fi
 # Extract the first word of "ln", so it can be a program name with args.
 set dummy ln; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2227: checking for $ac_word" >&5
+echo "configure:2245: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_path_LN'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2259,7 +2277,7 @@ fi
 # Extract the first word of "perl", so it can be a program name with args.
 set dummy perl; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2263: checking for $ac_word" >&5
+echo "configure:2281: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_path_PERL'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2295,7 +2313,7 @@ fi
 # Extract the first word of "makedepend", so it can be a program name with args.
 set dummy makedepend; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2299: checking for $ac_word" >&5
+echo "configure:2317: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_path_MAKEDEPEND'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2331,7 +2349,7 @@ fi
 # Extract the first word of "ar", so it can be a program name with args.
 set dummy ar; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:2335: checking for $ac_word" >&5
+echo "configure:2353: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_path_AR'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2391,12 +2409,12 @@ for ac_hdr in dirent.h sys/ndir.h sys/dir.h ndir.h
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr that defines DIR""... $ac_c" 1>&6
-echo "configure:2395: checking for $ac_hdr that defines DIR" >&5
+echo "configure:2413: checking for $ac_hdr that defines DIR" >&5
 if eval "test \"`echo '$''{'ac_cv_header_dirent_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2400 "configure"
+#line 2418 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <$ac_hdr>
@@ -2404,7 +2422,7 @@ int main() {
 DIR *dirp = 0;
 ; return 0; }
 EOF
-if { (eval echo configure:2408: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2426: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   eval "ac_cv_header_dirent_$ac_safe=yes"
 else
@@ -2429,7 +2447,7 @@ done
 # Two versions of opendir et al. are in -ldir and -lx on SCO Xenix.
 if test $ac_header_dirent = dirent.h; then
 echo $ac_n "checking for opendir in -ldir""... $ac_c" 1>&6
-echo "configure:2433: checking for opendir in -ldir" >&5
+echo "configure:2451: checking for opendir in -ldir" >&5
 ac_lib_var=`echo dir'_'opendir | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -2437,7 +2455,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-ldir  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 2441 "configure"
+#line 2459 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -2448,7 +2466,7 @@ int main() {
 opendir()
 ; return 0; }
 EOF
-if { (eval echo configure:2452: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:2470: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -2470,7 +2488,7 @@ fi
 
 else
 echo $ac_n "checking for opendir in -lx""... $ac_c" 1>&6
-echo "configure:2474: checking for opendir in -lx" >&5
+echo "configure:2492: checking for opendir in -lx" >&5
 ac_lib_var=`echo x'_'opendir | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -2478,7 +2496,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lx  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 2482 "configure"
+#line 2500 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -2489,7 +2507,7 @@ int main() {
 opendir()
 ; return 0; }
 EOF
-if { (eval echo configure:2493: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:2511: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -2512,12 +2530,12 @@ fi
 fi
 
 echo $ac_n "checking for ANSI C header files""... $ac_c" 1>&6
-echo "configure:2516: checking for ANSI C header files" >&5
+echo "configure:2534: checking for ANSI C header files" >&5
 if eval "test \"`echo '$''{'ac_cv_header_stdc'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2521 "configure"
+#line 2539 "configure"
 #include "confdefs.h"
 #include <stdlib.h>
 #include <stdarg.h>
@@ -2525,7 +2543,7 @@ else
 #include <float.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:2529: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:2547: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -2542,7 +2560,7 @@ rm -f conftest*
 if test $ac_cv_header_stdc = yes; then
   # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
 cat > conftest.$ac_ext <<EOF
-#line 2546 "configure"
+#line 2564 "configure"
 #include "confdefs.h"
 #include <string.h>
 EOF
@@ -2560,7 +2578,7 @@ fi
 if test $ac_cv_header_stdc = yes; then
   # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
 cat > conftest.$ac_ext <<EOF
-#line 2564 "configure"
+#line 2582 "configure"
 #include "confdefs.h"
 #include <stdlib.h>
 EOF
@@ -2581,7 +2599,7 @@ if test "$cross_compiling" = yes; then
   :
 else
   cat > conftest.$ac_ext <<EOF
-#line 2585 "configure"
+#line 2603 "configure"
 #include "confdefs.h"
 #include <ctype.h>
 #define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
@@ -2592,7 +2610,7 @@ if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2);
 exit (0); }
 
 EOF
-if { (eval echo configure:2596: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:2614: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   :
 else
@@ -2636,6 +2654,7 @@ for ac_hdr in \
 	ip_nat.h \
 	libc.h \
 	limits.h \
+	linux/netfilter_ipv4.h \
 	malloc.h \
 	math.h \
 	memory.h \
@@ -2686,17 +2705,17 @@ for ac_hdr in \
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:2690: checking for $ac_hdr" >&5
+echo "configure:2709: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2695 "configure"
+#line 2714 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:2700: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:2719: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -2724,12 +2743,12 @@ done
 
 
 echo $ac_n "checking for working const""... $ac_c" 1>&6
-echo "configure:2728: checking for working const" >&5
+echo "configure:2747: checking for working const" >&5
 if eval "test \"`echo '$''{'ac_cv_c_const'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2733 "configure"
+#line 2752 "configure"
 #include "confdefs.h"
 
 int main() {
@@ -2778,7 +2797,7 @@ ccp = (char const *const *) p;
 
 ; return 0; }
 EOF
-if { (eval echo configure:2782: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2801: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_const=yes
 else
@@ -2799,14 +2818,14 @@ EOF
 fi
 
 echo $ac_n "checking whether byte ordering is bigendian""... $ac_c" 1>&6
-echo "configure:2803: checking whether byte ordering is bigendian" >&5
+echo "configure:2822: checking whether byte ordering is bigendian" >&5
 if eval "test \"`echo '$''{'ac_cv_c_bigendian'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   ac_cv_c_bigendian=unknown
 # See if sys/param.h defines the BYTE_ORDER macro.
 cat > conftest.$ac_ext <<EOF
-#line 2810 "configure"
+#line 2829 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/param.h>
@@ -2817,11 +2836,11 @@ int main() {
 #endif
 ; return 0; }
 EOF
-if { (eval echo configure:2821: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2840: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   # It does; now see whether it defined to BIG_ENDIAN or not.
 cat > conftest.$ac_ext <<EOF
-#line 2825 "configure"
+#line 2844 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/param.h>
@@ -2832,7 +2851,7 @@ int main() {
 #endif
 ; return 0; }
 EOF
-if { (eval echo configure:2836: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2855: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_bigendian=yes
 else
@@ -2852,7 +2871,7 @@ if test "$cross_compiling" = yes; then
     { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
 else
   cat > conftest.$ac_ext <<EOF
-#line 2856 "configure"
+#line 2875 "configure"
 #include "confdefs.h"
 main () {
   /* Are we little or big endian?  From Harbison&Steele.  */
@@ -2865,7 +2884,7 @@ main () {
   exit (u.c[sizeof (long) - 1] == 1);
 }
 EOF
-if { (eval echo configure:2869: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:2888: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_c_bigendian=no
 else
@@ -2890,20 +2909,20 @@ fi
 
 
 echo $ac_n "checking if ANSI prototypes work""... $ac_c" 1>&6
-echo "configure:2894: checking if ANSI prototypes work" >&5
+echo "configure:2913: checking if ANSI prototypes work" >&5
 if eval "test \"`echo '$''{'ac_cv_have_ansi_prototypes'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   
   cat > conftest.$ac_ext <<EOF
-#line 2900 "configure"
+#line 2919 "configure"
 #include "confdefs.h"
 int foo(char *); int foo (char *bar) {return 1;}
 int main() {
 foo("bar")
 ; return 0; }
 EOF
-if { (eval echo configure:2907: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2926: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_have_ansi_prototypes="yes"
 else
@@ -2925,13 +2944,13 @@ EOF
 fi
 
 echo $ac_n "checking for tm->tm_gmtoff""... $ac_c" 1>&6
-echo "configure:2929: checking for tm->tm_gmtoff" >&5
+echo "configure:2948: checking for tm->tm_gmtoff" >&5
 if eval "test \"`echo '$''{'ac_cv_have_tm_gmoff'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   
   cat > conftest.$ac_ext <<EOF
-#line 2935 "configure"
+#line 2954 "configure"
 #include "confdefs.h"
 #include <time.h>
 #include <sys/time.h>
@@ -2940,7 +2959,7 @@ struct tm foo;
       foo.tm_gmtoff = 0;
 ; return 0; }
 EOF
-if { (eval echo configure:2944: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2963: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_have_tm_gmoff="yes"
 else
@@ -2962,13 +2981,13 @@ EOF
 fi
 
 echo $ac_n "checking for struct mallinfo""... $ac_c" 1>&6
-echo "configure:2966: checking for struct mallinfo" >&5
+echo "configure:2985: checking for struct mallinfo" >&5
 if eval "test \"`echo '$''{'ac_cv_have_struct_mallinfo'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   
   cat > conftest.$ac_ext <<EOF
-#line 2972 "configure"
+#line 2991 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #if HAVE_MALLOC_H
@@ -2986,7 +3005,7 @@ struct mallinfo foo;
     foo.keepcost = 0;
 ; return 0; }
 EOF
-if { (eval echo configure:2990: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:3009: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_have_struct_mallinfo="yes"
 else
@@ -3008,13 +3027,13 @@ EOF
 fi
 
 echo $ac_n "checking for extended mallinfo""... $ac_c" 1>&6
-echo "configure:3012: checking for extended mallinfo" >&5
+echo "configure:3031: checking for extended mallinfo" >&5
 if eval "test \"`echo '$''{'ac_cv_have_ext_mallinfo'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   
   cat > conftest.$ac_ext <<EOF
-#line 3018 "configure"
+#line 3037 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <malloc.h>
@@ -3023,7 +3042,7 @@ struct mallinfo foo;
       foo.mxfast = 0;
 ; return 0; }
 EOF
-if { (eval echo configure:3027: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:3046: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_have_ext_mallinfo="yes"
 else
@@ -3045,13 +3064,13 @@ EOF
 fi
 
 echo $ac_n "checking for struct rusage""... $ac_c" 1>&6
-echo "configure:3049: checking for struct rusage" >&5
+echo "configure:3068: checking for struct rusage" >&5
 if eval "test \"`echo '$''{'ac_cv_have_struct_rusage'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   
   cat > conftest.$ac_ext <<EOF
-#line 3055 "configure"
+#line 3074 "configure"
 #include "confdefs.h"
 
 #if HAVE_SYS_TIME_H
@@ -3064,7 +3083,7 @@ int main() {
 struct rusage R;
 ; return 0; }
 EOF
-if { (eval echo configure:3068: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:3087: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_have_struct_rusage="yes"
 else
@@ -3086,13 +3105,13 @@ EOF
 fi
 
 echo $ac_n "checking for ip->ip_hl""... $ac_c" 1>&6
-echo "configure:3090: checking for ip->ip_hl" >&5
+echo "configure:3109: checking for ip->ip_hl" >&5
 if eval "test \"`echo '$''{'ac_cv_have_ip_hl'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   
   cat > conftest.$ac_ext <<EOF
-#line 3096 "configure"
+#line 3115 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <netinet/in.h>
@@ -3111,7 +3130,7 @@ struct iphdr ip;
       ip.ip_hl= 0;
 ; return 0; }
 EOF
-if { (eval echo configure:3115: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:3134: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_have_ip_hl="yes"
 else
@@ -3133,7 +3152,7 @@ EOF
 fi
 
 echo $ac_n "checking size of int""... $ac_c" 1>&6
-echo "configure:3137: checking size of int" >&5
+echo "configure:3156: checking size of int" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_int'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3141,7 +3160,7 @@ else
     { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
 else
   cat > conftest.$ac_ext <<EOF
-#line 3145 "configure"
+#line 3164 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 main()
@@ -3152,7 +3171,7 @@ main()
   exit(0);
 }
 EOF
-if { (eval echo configure:3156: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:3175: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_sizeof_int=`cat conftestval`
 else
@@ -3172,7 +3191,7 @@ EOF
 
 
 echo $ac_n "checking size of long""... $ac_c" 1>&6
-echo "configure:3176: checking size of long" >&5
+echo "configure:3195: checking size of long" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_long'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3180,7 +3199,7 @@ else
     { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
 else
   cat > conftest.$ac_ext <<EOF
-#line 3184 "configure"
+#line 3203 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 main()
@@ -3191,7 +3210,7 @@ main()
   exit(0);
 }
 EOF
-if { (eval echo configure:3195: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:3214: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_sizeof_long=`cat conftestval`
 else
@@ -3211,7 +3230,7 @@ EOF
 
 
 echo $ac_n "checking size of void *""... $ac_c" 1>&6
-echo "configure:3215: checking size of void *" >&5
+echo "configure:3234: checking size of void *" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_void_p'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3219,7 +3238,7 @@ else
     { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
 else
   cat > conftest.$ac_ext <<EOF
-#line 3223 "configure"
+#line 3242 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 main()
@@ -3230,7 +3249,7 @@ main()
   exit(0);
 }
 EOF
-if { (eval echo configure:3234: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:3253: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_sizeof_void_p=`cat conftestval`
 else
@@ -3253,19 +3272,19 @@ EOF
 # The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
 # for constant arguments.  Useless!
 echo $ac_n "checking for working alloca.h""... $ac_c" 1>&6
-echo "configure:3257: checking for working alloca.h" >&5
+echo "configure:3276: checking for working alloca.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_alloca_h'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3262 "configure"
+#line 3281 "configure"
 #include "confdefs.h"
 #include <alloca.h>
 int main() {
 char *p = alloca(2 * sizeof(int));
 ; return 0; }
 EOF
-if { (eval echo configure:3269: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3288: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_header_alloca_h=yes
 else
@@ -3286,12 +3305,12 @@ EOF
 fi
 
 echo $ac_n "checking for alloca""... $ac_c" 1>&6
-echo "configure:3290: checking for alloca" >&5
+echo "configure:3309: checking for alloca" >&5
 if eval "test \"`echo '$''{'ac_cv_func_alloca_works'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3295 "configure"
+#line 3314 "configure"
 #include "confdefs.h"
 
 #ifdef __GNUC__
@@ -3319,7 +3338,7 @@ int main() {
 char *p = (char *) alloca(1);
 ; return 0; }
 EOF
-if { (eval echo configure:3323: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3342: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_func_alloca_works=yes
 else
@@ -3351,12 +3370,12 @@ EOF
 
 
 echo $ac_n "checking whether alloca needs Cray hooks""... $ac_c" 1>&6
-echo "configure:3355: checking whether alloca needs Cray hooks" >&5
+echo "configure:3374: checking whether alloca needs Cray hooks" >&5
 if eval "test \"`echo '$''{'ac_cv_os_cray'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3360 "configure"
+#line 3379 "configure"
 #include "confdefs.h"
 #if defined(CRAY) && ! defined(CRAY2)
 webecray
@@ -3381,12 +3400,12 @@ echo "$ac_t""$ac_cv_os_cray" 1>&6
 if test $ac_cv_os_cray = yes; then
 for ac_func in _getb67 GETB67 getb67; do
   echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:3385: checking for $ac_func" >&5
+echo "configure:3404: checking for $ac_func" >&5
 if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3390 "configure"
+#line 3409 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func(); below.  */
@@ -3409,7 +3428,7 @@ $ac_func();
 
 ; return 0; }
 EOF
-if { (eval echo configure:3413: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3432: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_$ac_func=yes"
 else
@@ -3436,7 +3455,7 @@ done
 fi
 
 echo $ac_n "checking stack direction for C alloca""... $ac_c" 1>&6
-echo "configure:3440: checking stack direction for C alloca" >&5
+echo "configure:3459: checking stack direction for C alloca" >&5
 if eval "test \"`echo '$''{'ac_cv_c_stack_direction'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3444,7 +3463,7 @@ else
   ac_cv_c_stack_direction=0
 else
   cat > conftest.$ac_ext <<EOF
-#line 3448 "configure"
+#line 3467 "configure"
 #include "confdefs.h"
 find_stack_direction ()
 {
@@ -3463,7 +3482,7 @@ main ()
   exit (find_stack_direction() < 0);
 }
 EOF
-if { (eval echo configure:3467: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:3486: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_c_stack_direction=1
 else
@@ -3486,12 +3505,12 @@ fi
 
 
 echo $ac_n "checking for pid_t""... $ac_c" 1>&6
-echo "configure:3490: checking for pid_t" >&5
+echo "configure:3509: checking for pid_t" >&5
 if eval "test \"`echo '$''{'ac_cv_type_pid_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3495 "configure"
+#line 3514 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #if STDC_HEADERS
@@ -3519,12 +3538,12 @@ EOF
 fi
 
 echo $ac_n "checking for size_t""... $ac_c" 1>&6
-echo "configure:3523: checking for size_t" >&5
+echo "configure:3542: checking for size_t" >&5
 if eval "test \"`echo '$''{'ac_cv_type_size_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3528 "configure"
+#line 3547 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #if STDC_HEADERS
@@ -3552,12 +3571,12 @@ EOF
 fi
 
 echo $ac_n "checking for ssize_t""... $ac_c" 1>&6
-echo "configure:3556: checking for ssize_t" >&5
+echo "configure:3575: checking for ssize_t" >&5
 if eval "test \"`echo '$''{'ac_cv_type_ssize_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3561 "configure"
+#line 3580 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #if STDC_HEADERS
@@ -3585,12 +3604,12 @@ EOF
 fi
 
 echo $ac_n "checking for off_t""... $ac_c" 1>&6
-echo "configure:3589: checking for off_t" >&5
+echo "configure:3608: checking for off_t" >&5
 if eval "test \"`echo '$''{'ac_cv_type_off_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3594 "configure"
+#line 3613 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #if STDC_HEADERS
@@ -3618,12 +3637,12 @@ EOF
 fi
 
 echo $ac_n "checking for mode_t""... $ac_c" 1>&6
-echo "configure:3622: checking for mode_t" >&5
+echo "configure:3641: checking for mode_t" >&5
 if eval "test \"`echo '$''{'ac_cv_type_mode_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3627 "configure"
+#line 3646 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #if STDC_HEADERS
@@ -3651,12 +3670,12 @@ EOF
 fi
 
 echo $ac_n "checking for fd_mask""... $ac_c" 1>&6
-echo "configure:3655: checking for fd_mask" >&5
+echo "configure:3674: checking for fd_mask" >&5
 if eval "test \"`echo '$''{'ac_cv_type_fd_mask'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3660 "configure"
+#line 3679 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #if STDC_HEADERS
@@ -3685,13 +3704,13 @@ fi
 
 
 echo $ac_n "checking for socklen_t""... $ac_c" 1>&6
-echo "configure:3689: checking for socklen_t" >&5
+echo "configure:3708: checking for socklen_t" >&5
 if eval "test \"`echo '$''{'ac_cv_type_socklen_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   
   cat > conftest.$ac_ext <<EOF
-#line 3695 "configure"
+#line 3714 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -3722,13 +3741,13 @@ EOF
 fi
 
 echo $ac_n "checking for mtyp_t""... $ac_c" 1>&6
-echo "configure:3726: checking for mtyp_t" >&5
+echo "configure:3745: checking for mtyp_t" >&5
 if eval "test \"`echo '$''{'ac_cv_type_mtyp_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   
   cat > conftest.$ac_ext <<EOF
-#line 3732 "configure"
+#line 3751 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/ipc.h>
@@ -3756,7 +3775,7 @@ EOF
  fi
 
 echo $ac_n "checking for main in -lnsl""... $ac_c" 1>&6
-echo "configure:3760: checking for main in -lnsl" >&5
+echo "configure:3779: checking for main in -lnsl" >&5
 ac_lib_var=`echo nsl'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3764,14 +3783,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lnsl  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3768 "configure"
+#line 3787 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:3775: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3794: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3799,7 +3818,7 @@ else
 fi
 
 echo $ac_n "checking for main in -lsocket""... $ac_c" 1>&6
-echo "configure:3803: checking for main in -lsocket" >&5
+echo "configure:3822: checking for main in -lsocket" >&5
 ac_lib_var=`echo socket'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3807,14 +3826,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lsocket  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3811 "configure"
+#line 3830 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:3818: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3837: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3846,7 +3865,7 @@ if test "x$ac_cv_enabled_dlmalloc" = "xyes" ; then
   echo "skipping libmalloc check (--enable-dlmalloc specified)"
 else
   echo $ac_n "checking for main in -lgnumalloc""... $ac_c" 1>&6
-echo "configure:3850: checking for main in -lgnumalloc" >&5
+echo "configure:3869: checking for main in -lgnumalloc" >&5
 ac_lib_var=`echo gnumalloc'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3854,14 +3873,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lgnumalloc  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3858 "configure"
+#line 3877 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:3865: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3884: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3904,7 +3923,7 @@ fi
 			*)
   
 				echo $ac_n "checking for main in -lmalloc""... $ac_c" 1>&6
-echo "configure:3908: checking for main in -lmalloc" >&5
+echo "configure:3927: checking for main in -lmalloc" >&5
 ac_lib_var=`echo malloc'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3912,14 +3931,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lmalloc  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3916 "configure"
+#line 3935 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:3923: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3942: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3952,7 +3971,7 @@ fi
 fi
 
 echo $ac_n "checking for main in -lbsd""... $ac_c" 1>&6
-echo "configure:3956: checking for main in -lbsd" >&5
+echo "configure:3975: checking for main in -lbsd" >&5
 ac_lib_var=`echo bsd'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3960,14 +3979,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lbsd  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3964 "configure"
+#line 3983 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:3971: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3990: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3995,7 +4014,7 @@ else
 fi
 
 echo $ac_n "checking for main in -lregex""... $ac_c" 1>&6
-echo "configure:3999: checking for main in -lregex" >&5
+echo "configure:4018: checking for main in -lregex" >&5
 ac_lib_var=`echo regex'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4003,14 +4022,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lregex  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4007 "configure"
+#line 4026 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:4014: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4033: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4031,7 +4050,7 @@ else
 fi
 
 echo $ac_n "checking for gethostbyname in -lbind""... $ac_c" 1>&6
-echo "configure:4035: checking for gethostbyname in -lbind" >&5
+echo "configure:4054: checking for gethostbyname in -lbind" >&5
 ac_lib_var=`echo bind'_'gethostbyname | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4039,7 +4058,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lbind  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4043 "configure"
+#line 4062 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -4050,7 +4069,7 @@ int main() {
 gethostbyname()
 ; return 0; }
 EOF
-if { (eval echo configure:4054: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4073: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4084,7 +4103,7 @@ if test $ac_cv_lib_bind_gethostbyname = "no" ; then
 		;;
 	*)
 		echo $ac_n "checking for inet_aton in -lresolv""... $ac_c" 1>&6
-echo "configure:4088: checking for inet_aton in -lresolv" >&5
+echo "configure:4107: checking for inet_aton in -lresolv" >&5
 ac_lib_var=`echo resolv'_'inet_aton | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4092,7 +4111,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lresolv  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4096 "configure"
+#line 4115 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -4103,7 +4122,7 @@ int main() {
 inet_aton()
 ; return 0; }
 EOF
-if { (eval echo configure:4107: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4126: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4119,7 +4138,7 @@ fi
 if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
   echo "$ac_t""yes" 1>&6
   echo $ac_n "checking for inet_aton in -l44bsd""... $ac_c" 1>&6
-echo "configure:4123: checking for inet_aton in -l44bsd" >&5
+echo "configure:4142: checking for inet_aton in -l44bsd" >&5
 ac_lib_var=`echo 44bsd'_'inet_aton | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4127,7 +4146,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-l44bsd  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4131 "configure"
+#line 4150 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -4138,7 +4157,7 @@ int main() {
 inet_aton()
 ; return 0; }
 EOF
-if { (eval echo configure:4142: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4161: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4170,7 +4189,7 @@ else
 fi
 
 		echo $ac_n "checking for main in -lresolv""... $ac_c" 1>&6
-echo "configure:4174: checking for main in -lresolv" >&5
+echo "configure:4193: checking for main in -lresolv" >&5
 ac_lib_var=`echo resolv'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4178,14 +4197,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lresolv  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4182 "configure"
+#line 4201 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:4189: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4208: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4216,7 +4235,7 @@ fi
     esac
 fi
 echo $ac_n "checking for main in -lm""... $ac_c" 1>&6
-echo "configure:4220: checking for main in -lm" >&5
+echo "configure:4239: checking for main in -lm" >&5
 ac_lib_var=`echo m'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4224,14 +4243,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lm  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4228 "configure"
+#line 4247 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:4235: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4254: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4260,7 +4279,7 @@ fi
 
 
 echo $ac_n "checking for crypt in -lcrypt""... $ac_c" 1>&6
-echo "configure:4264: checking for crypt in -lcrypt" >&5
+echo "configure:4283: checking for crypt in -lcrypt" >&5
 ac_lib_var=`echo crypt'_'crypt | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4268,7 +4287,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lcrypt  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4272 "configure"
+#line 4291 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -4279,7 +4298,7 @@ int main() {
 crypt()
 ; return 0; }
 EOF
-if { (eval echo configure:4283: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4302: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4302,7 +4321,7 @@ fi
 
 
 echo $ac_n "checking for dlopen in -ldl""... $ac_c" 1>&6
-echo "configure:4306: checking for dlopen in -ldl" >&5
+echo "configure:4325: checking for dlopen in -ldl" >&5
 ac_lib_var=`echo dl'_'dlopen | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4310,7 +4329,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-ldl  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4314 "configure"
+#line 4333 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -4321,7 +4340,7 @@ int main() {
 dlopen()
 ; return 0; }
 EOF
-if { (eval echo configure:4325: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4344: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4344,7 +4363,7 @@ fi
 
 
 echo $ac_n "checking for main in -lpthread""... $ac_c" 1>&6
-echo "configure:4348: checking for main in -lpthread" >&5
+echo "configure:4367: checking for main in -lpthread" >&5
 ac_lib_var=`echo pthread'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4352,14 +4371,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lpthread  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4356 "configure"
+#line 4375 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:4363: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4382: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4384,7 +4403,7 @@ fi
 case "$host" in
 	*-pc-sco3.2*)
 		echo $ac_n "checking for strftime in -lintl""... $ac_c" 1>&6
-echo "configure:4388: checking for strftime in -lintl" >&5
+echo "configure:4407: checking for strftime in -lintl" >&5
 ac_lib_var=`echo intl'_'strftime | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4392,7 +4411,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lintl  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4396 "configure"
+#line 4415 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -4403,7 +4422,7 @@ int main() {
 strftime()
 ; return 0; }
 EOF
-if { (eval echo configure:4407: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4426: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4585,12 +4604,12 @@ for ac_func in \
 
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:4589: checking for $ac_func" >&5
+echo "configure:4608: checking for $ac_func" >&5
 if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4594 "configure"
+#line 4613 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func(); below.  */
@@ -4613,7 +4632,7 @@ $ac_func();
 
 ; return 0; }
 EOF
-if { (eval echo configure:4617: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4636: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_$ac_func=yes"
 else
@@ -4639,7 +4658,7 @@ done
 
 
 echo $ac_n "checking if setresuid is implemented""... $ac_c" 1>&6
-echo "configure:4643: checking if setresuid is implemented" >&5
+echo "configure:4662: checking if setresuid is implemented" >&5
 if eval "test \"`echo '$''{'ac_cv_func_setresuid'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -4647,7 +4666,7 @@ else
     { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
 else
   cat > conftest.$ac_ext <<EOF
-#line 4651 "configure"
+#line 4670 "configure"
 #include "confdefs.h"
 
 #include <stdlib.h>
@@ -4660,7 +4679,7 @@ else
   }
   
 EOF
-if { (eval echo configure:4664: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:4683: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_func_setresuid="yes"
 else
@@ -4685,7 +4704,7 @@ fi
 
 if test "$IPF_TRANSPARENT" ; then
     echo $ac_n "checking if IP-Filter header files are installed""... $ac_c" 1>&6
-echo "configure:4689: checking if IP-Filter header files are installed" >&5
+echo "configure:4708: checking if IP-Filter header files are installed" >&5
     # hold on to your hats...
     if test "$ac_cv_header_ip_compat_h" = "yes" ||
         test "$ac_cv_header_ip_fil_compat_h" = "yes" ||
@@ -4724,6 +4743,31 @@ if test "$IPF_TRANSPARENT" = "no" ; then
     sleep 10
 fi
 
+if test "$LINUX_NETFILTER" ; then
+    echo $ac_n "checking if Linux 2.4 kernel header files are installed""... $ac_c" 1>&6
+echo "configure:4749: checking if Linux 2.4 kernel header files are installed" >&5
+    # hold on to your hats...
+    if test "$ac_cv_header_linux_netfilter_ipv4_h" = "yes"; then
+        LINUX_NETFILTER="yes"
+        cat >> confdefs.h <<\EOF
+#define LINUX_NETFILTER 1
+EOF
+
+    else
+        LINUX_NETFILTER="no"
+        cat >> confdefs.h <<\EOF
+#define LINUX_NETFILTER 0
+EOF
+
+    fi
+    echo "$ac_t""$LINUX_NETFILTER" 1>&6
+fi 
+if test "$LINUX_NETFILTER" = "no" ; then
+    echo "WARNING: Cannot find necessary Linux 2.4 kernel header files"
+    echo "         Linux 2.4 Transparent Proxy support WILL NOT be enabled"
+    sleep 10
+fi
+
 if test -z "$USE_GNUREGEX" ; then
     case "$host" in
     *-sun-solaris2.[0-4])
@@ -4735,13 +4779,13 @@ if test -z "$USE_GNUREGEX" ; then
     esac
 fi
 echo $ac_n "checking if GNUregex needs to be compiled""... $ac_c" 1>&6
-echo "configure:4739: checking if GNUregex needs to be compiled" >&5
+echo "configure:4783: checking if GNUregex needs to be compiled" >&5
 if test -z "$USE_GNUREGEX"; then
 if test "$ac_cv_func_regcomp" = "no" || test "$USE_GNUREGEX" = "yes" ; then
 	USE_GNUREGEX="yes"
 else
 	cat > conftest.$ac_ext <<EOF
-#line 4745 "configure"
+#line 4789 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <regex.h>
@@ -4749,7 +4793,7 @@ int main() {
 regex_t t; regcomp(&t,"",0);
 ; return 0; }
 EOF
-if { (eval echo configure:4753: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:4797: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   USE_GNUREGEX="no"
 else
@@ -4780,12 +4824,12 @@ for ac_func in \
 
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:4784: checking for $ac_func" >&5
+echo "configure:4828: checking for $ac_func" >&5
 if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4789 "configure"
+#line 4833 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func(); below.  */
@@ -4808,7 +4852,7 @@ $ac_func();
 
 ; return 0; }
 EOF
-if { (eval echo configure:4812: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4856: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_$ac_func=yes"
 else
@@ -4836,12 +4880,12 @@ done
 
 
 echo $ac_n "checking Default FD_SETSIZE value""... $ac_c" 1>&6
-echo "configure:4840: checking Default FD_SETSIZE value" >&5
+echo "configure:4884: checking Default FD_SETSIZE value" >&5
 if test "$cross_compiling" = yes; then
   DEFAULT_FD_SETSIZE=256
 else
   cat > conftest.$ac_ext <<EOF
-#line 4845 "configure"
+#line 4889 "configure"
 #include "confdefs.h"
 
 #if HAVE_STDIO_H
@@ -4866,7 +4910,7 @@ main() {
 }
 
 EOF
-if { (eval echo configure:4870: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:4914: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   DEFAULT_FD_SETSIZE=`cat conftestval`
 else
@@ -4885,7 +4929,7 @@ EOF
 
 
 echo $ac_n "checking Maximum number of filedescriptors we can open""... $ac_c" 1>&6
-echo "configure:4889: checking Maximum number of filedescriptors we can open" >&5
+echo "configure:4933: checking Maximum number of filedescriptors we can open" >&5
 TLDFLAGS="$LDFLAGS"
 case $host in
 i386-unknown-freebsd*)
@@ -4897,7 +4941,7 @@ if test "$cross_compiling" = yes; then
   SQUID_MAXFD=256
 else
   cat > conftest.$ac_ext <<EOF
-#line 4901 "configure"
+#line 4945 "configure"
 #include "confdefs.h"
 
 #include <stdio.h>
@@ -4957,7 +5001,7 @@ main() {
 }
 
 EOF
-if { (eval echo configure:4961: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:5005: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   SQUID_MAXFD=`cat conftestval`
 else
@@ -4984,12 +5028,12 @@ fi
 LDFLAGS="$TLDFLAGS"
 
 echo $ac_n "checking Default UDP send buffer size""... $ac_c" 1>&6
-echo "configure:4988: checking Default UDP send buffer size" >&5
+echo "configure:5032: checking Default UDP send buffer size" >&5
 if test "$cross_compiling" = yes; then
   SQUID_UDP_SO_SNDBUF=16384
 else
   cat > conftest.$ac_ext <<EOF
-#line 4993 "configure"
+#line 5037 "configure"
 #include "confdefs.h"
 
 #include <stdlib.h>
@@ -5010,7 +5054,7 @@ main ()
 }
 
 EOF
-if { (eval echo configure:5014: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:5058: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   SQUID_UDP_SO_SNDBUF=`cat conftestval`
 else
@@ -5029,12 +5073,12 @@ EOF
 
 
 echo $ac_n "checking Default UDP receive buffer size""... $ac_c" 1>&6
-echo "configure:5033: checking Default UDP receive buffer size" >&5
+echo "configure:5077: checking Default UDP receive buffer size" >&5
 if test "$cross_compiling" = yes; then
   SQUID_UDP_SO_RCVBUF=16384
 else
   cat > conftest.$ac_ext <<EOF
-#line 5038 "configure"
+#line 5082 "configure"
 #include "confdefs.h"
 
 #include <stdlib.h>
@@ -5055,7 +5099,7 @@ main ()
 }
 
 EOF
-if { (eval echo configure:5059: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:5103: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   SQUID_UDP_SO_RCVBUF=`cat conftestval`
 else
@@ -5074,12 +5118,12 @@ EOF
 
 
 echo $ac_n "checking Default TCP send buffer size""... $ac_c" 1>&6
-echo "configure:5078: checking Default TCP send buffer size" >&5
+echo "configure:5122: checking Default TCP send buffer size" >&5
 if test "$cross_compiling" = yes; then
   SQUID_TCP_SO_SNDBUF=16384
 else
   cat > conftest.$ac_ext <<EOF
-#line 5083 "configure"
+#line 5127 "configure"
 #include "confdefs.h"
 
 #include <stdlib.h>
@@ -5100,7 +5144,7 @@ main ()
 }
 
 EOF
-if { (eval echo configure:5104: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:5148: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   SQUID_TCP_SO_SNDBUF=`cat conftestval`
 else
@@ -5119,12 +5163,12 @@ EOF
 
 
 echo $ac_n "checking Default TCP receive buffer size""... $ac_c" 1>&6
-echo "configure:5123: checking Default TCP receive buffer size" >&5
+echo "configure:5167: checking Default TCP receive buffer size" >&5
 if test "$cross_compiling" = yes; then
   SQUID_TCP_SO_RCVBUF=16384
 else
   cat > conftest.$ac_ext <<EOF
-#line 5128 "configure"
+#line 5172 "configure"
 #include "confdefs.h"
 
 #include <stdlib.h>
@@ -5145,7 +5189,7 @@ main ()
 }
 
 EOF
-if { (eval echo configure:5149: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:5193: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   SQUID_TCP_SO_RCVBUF=`cat conftestval`
 else
@@ -5164,19 +5208,19 @@ EOF
 
 
 echo $ac_n "checking if sys_errlist is already defined""... $ac_c" 1>&6
-echo "configure:5168: checking if sys_errlist is already defined" >&5
+echo "configure:5212: checking if sys_errlist is already defined" >&5
 if eval "test \"`echo '$''{'ac_cv_needs_sys_errlist'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5173 "configure"
+#line 5217 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 int main() {
 char *s = sys_errlist;
 ; return 0; }
 EOF
-if { (eval echo configure:5180: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5224: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_needs_sys_errlist="no"
 else
@@ -5198,16 +5242,16 @@ EOF
 fi
 
 echo $ac_n "checking for libresolv _dns_ttl_ hack""... $ac_c" 1>&6
-echo "configure:5202: checking for libresolv _dns_ttl_ hack" >&5
+echo "configure:5246: checking for libresolv _dns_ttl_ hack" >&5
 cat > conftest.$ac_ext <<EOF
-#line 5204 "configure"
+#line 5248 "configure"
 #include "confdefs.h"
 extern int _dns_ttl_;
 int main() {
 return _dns_ttl_;
 ; return 0; }
 EOF
-if { (eval echo configure:5211: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:5255: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   echo "$ac_t""yes" 1>&6
 cat >> confdefs.h <<\EOF
@@ -5223,12 +5267,12 @@ fi
 rm -f conftest*
 
 echo $ac_n "checking if inet_ntoa() actually works""... $ac_c" 1>&6
-echo "configure:5227: checking if inet_ntoa() actually works" >&5
+echo "configure:5271: checking if inet_ntoa() actually works" >&5
 if test "$cross_compiling" = yes; then
   INET_NTOA_RESULT="broken"
 else
   cat > conftest.$ac_ext <<EOF
-#line 5232 "configure"
+#line 5276 "configure"
 #include "confdefs.h"
 
 #include <stdlib.h>
@@ -5247,7 +5291,7 @@ main ()
 }
 
 EOF
-if { (eval echo configure:5251: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:5295: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   INET_NTOA_RESULT=`cat conftestval`
 else
@@ -5273,9 +5317,9 @@ fi
 
 if test "$ac_cv_header_sys_statvfs_h" = "yes" ; then
 echo $ac_n "checking for working statvfs() interface""... $ac_c" 1>&6
-echo "configure:5277: checking for working statvfs() interface" >&5
+echo "configure:5321: checking for working statvfs() interface" >&5
 cat > conftest.$ac_ext <<EOF
-#line 5279 "configure"
+#line 5323 "configure"
 #include "confdefs.h"
 
 #include <stdlib.h>
@@ -5292,7 +5336,7 @@ statvfs("/tmp", &sfs);
 
 ; return 0; }
 EOF
-if { (eval echo configure:5296: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5340: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_func_statvfs=yes
 else
@@ -5312,12 +5356,12 @@ fi
 fi
 
 echo $ac_n "checking for _res.nsaddr_list""... $ac_c" 1>&6
-echo "configure:5316: checking for _res.nsaddr_list" >&5
+echo "configure:5360: checking for _res.nsaddr_list" >&5
 if eval "test \"`echo '$''{'ac_cv_have_res_nsaddr_list'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5321 "configure"
+#line 5365 "configure"
 #include "confdefs.h"
 
 #if HAVE_SYS_TYPES_H
@@ -5340,7 +5384,7 @@ int main() {
 _res.nsaddr_list[0];
 ; return 0; }
 EOF
-if { (eval echo configure:5344: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5388: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_have_res_nsaddr_list="yes"
 else
@@ -5362,12 +5406,12 @@ fi
 
 if test $ac_cv_have_res_nsaddr_list = "no" ; then
 echo $ac_n "checking for _res.ns_list""... $ac_c" 1>&6
-echo "configure:5366: checking for _res.ns_list" >&5
+echo "configure:5410: checking for _res.ns_list" >&5
 if eval "test \"`echo '$''{'ac_cv_have_res_ns_list'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5371 "configure"
+#line 5415 "configure"
 #include "confdefs.h"
 
 #if HAVE_SYS_TYPES_H
@@ -5390,7 +5434,7 @@ int main() {
 _res.ns_list[0].addr;
 ; return 0; }
 EOF
-if { (eval echo configure:5394: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5438: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_have_res_ns_list="yes"
 else
diff --git a/configure.in b/configure.in
index c614b0e7c7..efdbf724b2 100644
--- a/configure.in
+++ b/configure.in
@@ -3,13 +3,13 @@ dnl  Configuration input file for Squid
 dnl
 dnl  Duane Wessels, wessels@nlanr.net, February 1996 (autoconf v2.9)
 dnl
-dnl  $Id: configure.in,v 1.208 2000/12/09 04:40:59 wessels Exp $
+dnl  $Id: configure.in,v 1.209 2000/12/16 16:52:30 adrian Exp $
 dnl
 dnl
 dnl
 AC_INIT(src/main.c)
 AC_CONFIG_HEADER(include/autoconf.h)
-AC_REVISION($Revision: 1.208 $)dnl
+AC_REVISION($Revision: 1.209 $)dnl
 AC_PREFIX_DEFAULT(/usr/local/squid)
 AC_CONFIG_AUX_DIR(cfgaux)
 
@@ -588,6 +588,17 @@ AC_ARG_ENABLE(ipf-transparent,
   fi
 ])
 
+dnl Enable Linux Netfilter (2.4) Transparent Proxy
+AC_ARG_ENABLE(linux-netfilter,
+[  --enable-linux-netfilter
+                          Enable Transparent Proxy support for Linux 2.4.],
+[ if test "$enableval" = "yes" ; then
+	echo "Linux-Netfilter Transparent Proxy enabled"
+	AC_DEFINE(LINUX_NETFILTER)
+	LINUX_NETFILTER="yes"
+  fi
+])
+
 dnl Enable Leak Finding Functions
 AC_ARG_ENABLE(leakfinder,
 [  --enable-leakfinder
@@ -808,6 +819,7 @@ AC_CHECK_HEADERS( \
 	ip_nat.h \
 	libc.h \
 	limits.h \
+	linux/netfilter_ipv4.h \
 	malloc.h \
 	math.h \
 	memory.h \
@@ -1268,6 +1280,26 @@ if test "$IPF_TRANSPARENT" = "no" ; then
     sleep 10
 fi
 
+dnl Linux-Netfilter support requires Linux 2.4 kernel header files.
+dnl Shamelessly copied from above
+if test "$LINUX_NETFILTER" ; then
+    AC_MSG_CHECKING(if Linux 2.4 kernel header files are installed)
+    # hold on to your hats...
+    if test "$ac_cv_header_linux_netfilter_ipv4_h" = "yes"; then
+        LINUX_NETFILTER="yes"
+        AC_DEFINE(LINUX_NETFILTER, 1)
+    else
+        LINUX_NETFILTER="no"
+        AC_DEFINE(LINUX_NETFILTER, 0)
+    fi
+    AC_MSG_RESULT($LINUX_NETFILTER)
+fi 
+if test "$LINUX_NETFILTER" = "no" ; then
+    echo "WARNING: Cannot find necessary Linux 2.4 kernel header files"
+    echo "         Linux 2.4 Transparent Proxy support WILL NOT be enabled"
+    sleep 10
+fi
+
 if test -z "$USE_GNUREGEX" ; then
     case "$host" in
     *-sun-solaris2.[[0-4]])
diff --git a/include/autoconf.h.in b/include/autoconf.h.in
index b70bee5694..7175cd2412 100644
--- a/include/autoconf.h.in
+++ b/include/autoconf.h.in
@@ -296,6 +296,11 @@
  */
 #undef USE_UNLINKD
 
+/* 
+ * Enable support for Transparent Proxy on Linux 2.4 systems
+ */
+#undef LINUX_NETFILTER
+
 /* The number of bytes in a int.  */
 #undef SIZEOF_INT
 
@@ -506,6 +511,9 @@
 /* Define if you have the <limits.h> header file.  */
 #undef HAVE_LIMITS_H
 
+/* Define if you have the <linux/netfilter_ipv4.h> header file.  */
+#undef HAVE_LINUX_NETFILTER_IPV4_H
+
 /* Define if you have the <malloc.h> header file.  */
 #undef HAVE_MALLOC_H
 
diff --git a/src/client_side.cc b/src/client_side.cc
index 3468c47ce0..bbe95be296 100644
--- a/src/client_side.cc
+++ b/src/client_side.cc
@@ -1,6 +1,6 @@
 
 /*
- * $Id: client_side.cc,v 1.516 2000/12/09 00:09:04 wessels Exp $
+ * $Id: client_side.cc,v 1.517 2000/12/16 16:52:32 adrian Exp $
  *
  * DEBUG: section 33    Client-side Routines
  * AUTHOR: Duane Wessels
@@ -62,6 +62,9 @@
 #endif
 #endif
 
+#if LINUX_NETFILTER
+#include <linux/netfilter_ipv4.h>
+#endif
 
 
 #if LINGERING_CLOSE
@@ -2275,6 +2278,9 @@ parseHttpRequest(ConnStateData * conn, method_t * method_p, int *status,
     static int siocgnatl_cmd = SIOCGNATL & 0xff;
     int x;
 #endif
+#if LINUX_NETFILTER
+    size_t sock_sz = sizeof(conn->me);
+#endif
 
     if ((req_sz = headersEnd(conn->in.buf, conn->in.offset)) == 0) {
 	debug(33, 5) ("Incomplete request, waiting for end of headers\n");
@@ -2467,6 +2473,11 @@ parseHttpRequest(ConnStateData * conn, method_t * method_p, int *status,
 		    inet_ntoa(natLookup.nl_realip),
 		    vport, url);
 #else
+#if LINUX_NETFILTER
+	  /* If the call fails the address structure will be unchanged */
+	  getsockopt(conn->fd, SOL_IP, SO_ORIGINAL_DST, &conn->me, &sock_sz );
+	    debug(33, 5) ("parseHttpRequest: addr = %s", inet_ntoa(conn->me.sin_addr) );
+#endif
 	    snprintf(http->uri, url_sz, "http://%s:%d%s",
 		inet_ntoa(http->conn->me.sin_addr),
 		vport, url);