vpp-swan: Add plugin for vpp-swan

Added plugin vpp-swan is a plugin that helps offloading
Strongswan IPsec ESP process from Linux Kernel to VPP.

Type: feature
Signed-off-by: Gabriel Oginski <gabrielx.oginski@intel.com>
Change-Id: Iec77945892453fac1890d3c49d7d86fc6b09c893
(cherry picked from commit 4e88e041ad47bf422bbb2a0940f77aba11ea2178)

1 files changed, 108 insertions, 0 deletions

diff --git a/extras/strongswan/vpp_sswan/Makefile b/extras/strongswan/vpp_sswan/Makefile
new file mode 100644
index 00000000000..cb642c8669f
--- /dev/null
+++ b/extras/strongswan/vpp_sswan/Makefile
@@ -0,0 +1,108 @@
+# the directory to the strongSwan sources
+SWANDIR=${CURDIR}/../../../build-root/build-vpp-native/external/sswan
+# location of config.h
+CONFIGH=$(SWANDIR)/config.h
+# default install prefix: /usr/local or /usr
+PREFIX=/usr
+# location of the installed strongSwan libraries
+SWANLIBS=$(PREFIX)/lib/ipsec/
+# location of the strongSwan plugins
+SWANPLUGINS=$(PREFIX)/lib/ipsec/plugins
+# location of the strongSwan archive
+SWANARCHIVE=${CURDIR}/../../../build/external/downloads
+# default install configuration files:
+PREFIX_SYS_CONF=/etc
+# target location of the plugin config snippet: $(PREFIX)/etc/strongswan.d/charon/ or /etc/strongswan.d/charon/
+PLUGINCONF=$(PREFIX_SYS_CONF)/strongswan.d/charon/
+# location of the  VPP libraries
+VPPLIBS=$(CURDIR)/../../../build-root/install-vpp-native/vpp/lib/x86_64-linux-gnu
+# the directory to the VPP sources
+VPPDIR=../../../build-root/install-vpp-native/vpp/include
+
+TARGET=libstrongswan-kernel-vpp.so
+
+# tested only with 5.9.5 and 5.9.6 version of strongSwan
+VERSION_SSWAN=5.9.6
+
+CFLAGS=-O2 -g -Wall -Wextra -fpic
+
+CFLAGS_I=-include $(CONFIGH) \
+	-I$(SWANDIR)/src/libstrongswan \
+	-I$(SWANDIR)/src/libcharon
+
+LDFLAGS= -lvppinfra \
+	-lvlibmemoryclient \
+	-lvppapiclient \
+	-lsvm \
+	-lvlib
+
+VERSION_VPP=$(shell (dpkg -s vpp | grep Version) | grep -Po '(?<=Version: )\d\d.\d\d')
+
+# check if VPP is installed
+ifneq ($(shell test "$(shell ldconfig -p | grep vppinfra.so | awk 'NR==1{print $$1;}')" && echo "yes"), yes)
+# check if VPPDIR exists
+ifeq ($(shell test -d $(VPPDIR) && echo "yes"), yes)
+	CFLAGS_I += -I$(VPPDIR)
+endif
+# check if VPPLIBS exists
+ifeq ($(shell test -d $(VPPLIBS) && echo "yes"), yes)
+	LDFLAGS += -L$(VPPLIBS)
+	LDFLAGS += -Wl,-rpath=$(VPPLIBS)
+endif
+endif
+
+SOURCES=$(wildcard *.c)
+OBJECTS=$(SOURCES:.c=.o)
+
+all: pull-swan $(TARGET)
+
+pull-swan:
+	@if [ -d "${SWANDIR}" ]; then \
+	  rm -rf ${SWANDIR} ; \
+	fi
+	@if ! [ -f "${SWANARCHIVE}/strongswan-${VERSION_SSWAN}.tar.gz" ]; then \
+	  curl -o ${SWANARCHIVE}/strongswan-${VERSION_SSWAN}.tar.gz -LO https://github.com/strongswan/strongswan/archive/${VERSION_SSWAN}.tar.gz; \
+	fi
+	@if ! [ -d "${CURDIR}/../../../build-root/build-vpp-native/external/" ]; then \
+	  mkdir ${CURDIR}/../../../build-root/build-vpp-native/external; \
+	fi
+	tar -zxof ${SWANARCHIVE}/strongswan-${VERSION_SSWAN}.tar.gz -C ${CURDIR}/../../../build-root/build-vpp-native/external/
+	mv ${CURDIR}/../../../build-root/build-vpp-native/external/strongswan-${VERSION_SSWAN} ${SWANDIR}
+	cd ${SWANDIR} && ./autogen.sh
+	cd ${SWANDIR} && ./configure --prefix=${PREFIX} --sysconfdir=${PREFIX_SYS_CONF} --enable-libipsec --enable-systemd --enable-swanctl --disable-gmp --enable-openssl
+	cd ${SWANDIR} && make -j$(nproc)
+#	cd ${SWANDIR} && sudo make install
+
+# check if VPP is installed
+ifneq ($(shell test "$(shell ldconfig -p | grep vppinfra.so | awk 'NR==1{print $$1;}')" && echo "yes"), yes)
+	$(info INFO: Not found installed VPP - checking if locally VPP exists)
+# check if VPPDIR exists
+ifneq ($(shell test -d $(VPPDIR) && echo "yes"), yes)
+	$(error ERROR: Not found installed VPP and locally VPP - please install or build)
+else
+# check if VPPLIBS exists
+ifneq ($(shell test -d $(VPPLIBS) && echo "yes"), yes)
+	$(error ERROR: directory $(VPPLIBS) - doesn't exists, please compile VPP before build this)
+else
+	$(info INFO: Found locally VPP)
+endif
+endif
+else
+	$(info INFO: Found installed VPP in version: $(VERSION_VPP))
+endif
+
+$(TARGET): $(OBJECTS)
+	gcc $(CFLAGS) -shared -DPIC $(OBJECTS) $(LDFLAGS) -Wl,-soname -Wl,$(TARGET) -o $@
+	cp $(TARGET) ${SWANDIR}
+
+%.o: %.c
+	gcc $(CFLAGS) $(CFLAGS_I) -c $< -o $@ $(LDFLAGS)
+
+install:
+	cp $(TARGET) $(SWANPLUGINS)/$(TARGET)
+	cp kernel-vpp.conf $(PLUGINCONF)
+
+clean:
+	rm -f *.so *.o
+
+.PHONY: clean install all
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