diff -Nur libnids-1.18/configure libnids-1.18.patched/configure
--- libnids-1.18.orig/configure	2003-10-15 01:40:09.000000000 +0200
+++ libnids-1.18/configure	2007-01-23 00:18:43.000000000 +0100
@@ -3253,7 +3253,7 @@ presetting ac_cv_c_bigendian=no (or yes)
 esac
 
 
-CFLAGS="$CFLAGS -D_BSD_SOURCE"
+CFLAGS="$CFLAGS"
 
 for ac_func in gettimeofday
 do
@@ -3489,17 +3489,21 @@ if test "${with_libpcap+set}" = set; the
 echo "${ECHO_T}no" >&6
      ;;
   *)
-     echo "$as_me:$LINENO: result: $withval" >&5
-echo "${ECHO_T}$withval" >&6
+     echo "$ac_t""$withval" 1>&6
      if test -f $withval/pcap.h -a -f $withval/libpcap.a; then
         owd=`pwd`
         if cd $withval; then withval=`pwd`; cd $owd; fi
-	PCAP_CFLAGS="-I$withval -I$withval/bpf"
+	PCAPINC="-I$withval -I$withval/bpf"
 	PCAPLIB="-L$withval -lpcap"
+     elif test -f $withval/include/pcap.h -a \
+	       -f $withval/include/pcap-bpf.h -a \
+	       -f $withval/lib/libpcap.a; then
+	owd=`pwd`
+	if cd $withval; then withval=`pwd`; cd $owd; fi
+	PCAPINC="-I$withval/include"
+	PCAPLIB="-L$withval/lib -lpcap"
      else
-        { { echo "$as_me:$LINENO: error: pcap.h or libpcap.a not found in $withval" >&5
-echo "$as_me: error: pcap.h or libpcap.a not found in $withval" >&2;}
-   { (exit 1); exit 1; }; }
+        { echo "configure: error: pcap.h" 1>&2; exit 1; }
      fi
      ;;
   esac
@@ -3605,18 +3609,18 @@ echo "${ECHO_T}no" >&6
   *)
      echo "$as_me:$LINENO: result: $withval" >&5
 echo "${ECHO_T}$withval" >&6
-     if test -f $withval/include/libnet.h -a -f $withval/lib/libnet.a -a -f $withval/libnet-config ; then
+     if test -f $withval/include/libnet.h -a -f $withval/bin/libnet-config ; then
         owd=`pwd`
         if cd $withval; then withval=`pwd`; cd $owd; fi
-	LNET_CFLAGS="-I$withval/include `$withval/libnet-config --defines`"
+	LNET_CFLAGS="-I$withval/include `$withval/bin/libnet-config --defines`"
 	LNETLIB="-L$withval/lib -lnet"
-     elif test -f $withval/include/libnet.h -a -f $withval/src/libnet.a; then
+     elif test -f $withval/include/libnet.h; then
         owd=`pwd`
         if cd $withval; then withval=`pwd`; cd $owd; fi
 	LNET_CFLAGS="-I$withval/include"
-	LNETLIB="-L$withval/src -lnet"
+	LNETLIB="-L$withval/lib -lnet"
      else
-	echo "A working combination of libnet.h, libnet.a and libnet-config not found in $withval; get libnet from www.packetfactory.net/projects/libnet and reinstall"
+	echo "A working combination of libnet.h and libnet-config not found in $withval; get libnet from www.packetfactory.net/projects/libnet and reinstall"
         { { echo "$as_me:$LINENO: error: libnet" >&5
 echo "$as_me: error: libnet" >&2;}
    { (exit 1); exit 1; }; }
@@ -3861,7 +3865,7 @@ if { (eval echo "$as_me:$LINENO: \"$ac_c
 else
   echo "$as_me: failed program was:" >&5
 cat conftest.$ac_ext >&5
-HAVE_BSD_UDPHDR=0
+HAVE_BSD_UDPHDR=1
 fi
 rm -f conftest.$ac_objext conftest.$ac_ext