Support for GNU/kFreeBSD, by Aurelien Jarno and others.
---
 configure    |   62 ++---------------------------------------------------------
 configure.in |   19 ++----------------
 2 files changed, 6 insertions(+), 75 deletions(-)

--- a/configure.in
+++ b/configure.in
@@ -104,6 +104,7 @@
 dnl
 AC_CHECK_HEADERS(sys/ioccom.h sys/sockio.h limits.h paths.h)
 AC_CHECK_HEADERS(net/pfvar.h, , , [#include <sys/types.h>
+#include <net/if_pflog.h>
 #include <sys/socket.h>
 #include <net/if.h>])
 if test "$ac_cv_header_net_pfvar_h" = yes; then
@@ -304,7 +305,7 @@
 	#
 	V_PCAP=bpf
 	AC_DEFINE(HAVE_CLONING_BPF,1,[define if you have a cloning BPF device])
-elif test -r /dev/bpf0 ; then
+elif test -r /dev/bpf0 || test -r /usr/include/net/bpf.h ; then
 	V_PCAP=bpf
 elif test -r /usr/include/net/pfilt.h ; then
 	V_PCAP=pf
@@ -464,20 +465,6 @@
 	#
 	AC_CHECK_HEADERS(net/if_media.h)
 
-	AC_MSG_CHECKING(whether the system supports zerocopy BPF)
-	AC_TRY_COMPILE(
-	    [#include <sys/socket.h>
-	    #include <sys/ioctl.h>
-	    #include <net/if.h>
-	    #include <net/bpf.h>],
-	    [return (BIOCROTZBUF + BPF_BUFMODE_ZBUF);],
-	    [  
-		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_ZEROCOPY_BPF, 1,
-		[define if the system supports zerocopy BPF])
-	    ],
-	    AC_MSG_RESULT(no))
-
 	    #
 	    # Check whether we have struct BPF_TIMEVAL.
 	    #
@@ -1234,7 +1221,7 @@
 	MAN_MISC_INFO=5
 	;;
 
-linux*|freebsd*|netbsd*|openbsd*|dragonfly*)
+linux*|freebsd*|netbsd*|openbsd*|dragonfly*|kfreebsd*)
 	DYEXT="so"
 
 	#
--- a/configure
+++ b/configure
@@ -5440,6 +5440,7 @@
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 #include <sys/types.h>
+#include <net/if_pflog.h>
 #include <sys/socket.h>
 #include <net/if.h>
 
@@ -6923,7 +6924,7 @@
 #define HAVE_CLONING_BPF 1
 _ACEOF
 
-elif test -r /dev/bpf0 ; then
+elif test -r /dev/bpf0 || test -r /usr/include/net/bpf.h ; then
 	V_PCAP=bpf
 elif test -r /usr/include/net/pfilt.h ; then
 	V_PCAP=pf
@@ -7665,63 +7666,6 @@
 
 done
 
-
-	{ echo "$as_me:$LINENO: checking whether the system supports zerocopy BPF" >&5
-echo $ECHO_N "checking whether the system supports zerocopy BPF... $ECHO_C" >&6; }
-	cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-#include <sys/socket.h>
-	    #include <sys/ioctl.h>
-	    #include <net/if.h>
-	    #include <net/bpf.h>
-int
-main ()
-{
-return (BIOCROTZBUF + BPF_BUFMODE_ZBUF);
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then
-
-		{ echo "$as_me:$LINENO: result: yes" >&5
-echo "${ECHO_T}yes" >&6; }
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_ZEROCOPY_BPF 1
-_ACEOF
-
-
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	{ echo "$as_me:$LINENO: result: no" >&5
-echo "${ECHO_T}no" >&6; }
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
 	    #
 	    # Check whether we have struct BPF_TIMEVAL.
 	    #
@@ -9607,7 +9551,7 @@
 	MAN_MISC_INFO=5
 	;;
 
-linux*|freebsd*|netbsd*|openbsd*|dragonfly*)
+linux*|freebsd*|netbsd*|openbsd*|dragonfly*|kfreebsd*)
 	DYEXT="so"
 
 	#