Added nBPF library

Author: lucaderi

configure.ac.in

@@ -348,16 +348,16 @@ if test -d "pro"; then :
 AC_MSG_RESULT(yes)
 PRO_OBJECTS='$(patsubst pro/%.cpp, pro/%.o, $(wildcard pro/*.cpp)) $(patsubst pro/flow_checks/%.cpp, pro/flow_checks/%.o, $(wildcard pro/flow_checks/*.cpp)) $(patsubst pro/host_checks/%.cpp, pro/host_checks/%.o, $(wildcard pro/host_checks/*.cpp))'
 
-if test "${with_nedge+set}" != set; then
-  if test $SYSTEM = "FreeBSD" || test $SYSTEM = "Darwin" || test $MACHINE = "armv7l" || test $MACHINE = "aarch64"; then
-  if test -d "../PF_RING"; then
-      cd ../PF_RING/userland/; ./configure; cd ./nbpf; ${MAKE}; cd ${HERE}
-      LIBS="${LIBS} -L../PF_RING/userland/nbpf -lnbpf"
-   else
-      echo "Missing ../PF_RING: please fetch PF_RING code from https://github.com/ntop/PF_RING and try again"
-      exit
-   fi
-  fi
+AC_MSG_CHECKING([PF_RING nBPF])
+NBPF_HOME=${PWD}/../PF_RING/userland/nbpf
+LIBNBPF=${NBPF_HOME}/libnbpf.a
+if test -f ${LIBNBPF}; then :
+   LIBS="${LIBS} ${LIBNBPF}"
+   CFLAGS="${CFLAGS} -I${NBPF_HOME}"
+   AC_DEFINE_UNQUOTED(HAVE_NBPF, "1", [PF_RING nBPF is present])
+   AC_MSG_RESULT(yes)
+else
+   AC_MSG_RESULT(no)
 fi
 
 CFLAGS="${CFLAGS} -I../PF_RING/userland/nbpf"