+dnl ------ libpcap / ziffy
+
+AC_SUBST(ZIFFY_PROG)
+AC_SUBST(PCAP_LIBS)
+AC_SUBST(PCAP_CFLAGS)
+ZIFFY_PROG=
+AC_ARG_WITH(pcap, [ --with-pcap[=DIR] libpcap root dir located in (dir)], [PCAP_DIR="$withval"],[PCAP_DIR=default])
+
+AC_MSG_CHECKING([for libpcap (required for ziffy)])
+if test "${PCAP_DIR}" != "no"; then
+ if test "${PCAP_DIR}" != "yes" && test "${PCAP_DIR}" != "default"; then
+ if test -r $PCAP_DIR/libpcap.a && test -r $PCAP_DIR/pcap.h; then
+ PCAP_DIR="$PCAP_DIR"
+ PCAP_LIBS="${LIBS} -L$PCAP_DIR -lpcap"
+ PCAP_CFLAGS="${INCS} -I$PCAP_DIR"
+ ZIFFY_PROG=ziffy
+ fi
+ else
+ if test -d /usr/local &&
+ test -r /usr/local/lib/libpcap.a &&
+ test -r /usr/local/include/pcap.h; then
+ PCAP_DIR="/usr/local"
+ PCAP_LIBS="${LIBS} -L$PCAP_DIR/lib -lpcap"
+ PCAP_CFLAGS="${INCS} -I$PCAP_DIR/include"
+ ZIFFY_PROG=ziffy
+ elif test -d /usr &&
+ test -r /usr/lib/libpcap.a &&
+ test -r /usr/include/pcap.h; then
+ PCAP_DIR="/usr"
+ PCAP_LIBS="${LIBS} -lpcap"
+ ZIFFY_PROG=ziffy
+ fi
+ fi
+fi
+if test -z "$ZIFFY_PROG"; then
+ AC_MSG_RESULT([not found. ziffy disabled])
+ if test "${PCAP_DIR}" != "default" && test "${PCAP_DIR}" != "no"; then
+ AC_MSG_ERROR([libpcap missing])
+ fi
+else
+ AC_MSG_RESULT([found in $PCAP_DIR])
+fi
+