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
diff --git a/extras/strongswan/vpp_sswan/Makefile b/extras/strongswan/vpp_sswan/Makefile
new file mode 100644
index 0000000..cb642c8
--- /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
\ No newline at end of file
diff --git a/extras/strongswan/vpp_sswan/README.rst b/extras/strongswan/vpp_sswan/README.rst
new file mode 100644
index 0000000..4def838
--- /dev/null
+++ b/extras/strongswan/vpp_sswan/README.rst
@@ -0,0 +1,128 @@
+.. _vpp_sswan_doc:
+
+VPP-SSWAN
+=======================
+
+``VPP-SSWAN`` is a StrongSwan plugin that helps offloading Strongswan IPsec ESP
+process from Linux Kernel to ``VPP``.
+
+The kernel-vpp plugin is an interface to the IPsec and networking backend for
+`VPP <https://wiki.fd.io/view/VPP>`__ platform using the
+`VPP C API <https://wiki.fd.io/view/VPP/How_To_Use_The_C_API>`__.
+It provides address and routing lookup functionality and installs routes for
+IPsec traffic.
+It installs and maintains Security Associations and Policies to the
+`VPP IPsec <https://wiki.fd.io/view/VPP/IPSec_and_IKEv2#IPSec>`__.
+
+Prerequisites
+-------------
+
+``VPP`` in release mode should be built before compiling ``vpp-swan plugin``.
+The dependencies of ``StrongSwan`` should be installed before building
+``VPP-SSWAN``. In addition ``libsystemd-dev`` should be installed.
+
+Build VPP Strongswan Plugin
+-------------
+
+The following list of things will be done to build ``vpp-swan plugin``:
+
+- download strongswan source code to:
+``path/to/vpp/build/external/downloads``
+
+- unzip source code strongswan to:
+``path/to/vpp/build-root/build-vpp-native/external/sswan``
+
+- check if you have installed packages: ``libsystemd-dev`` on your OS
+
+- configure strongswan by:
+``./configure --prefix=/usr --sysconfdir=/etc --enable-libipsec
+--enable-systemd --enable-swanctl --disable-gmp --enable-openssl``
+
+- compile strongswan in:
+``path/to/vpp/build-root/build-vpp-native/external/sswan``
+
+- compile ``vpp-swan plugin`` by:
+
+::
+
+ ./make all
+
+- if everything it ok, copy the compiled ``vpp-swan plugin`` to:
+``/usr/lib/ipsec/plugins``
+
+Build/install Strongswan
+-------------
+
+It is recommended to use ``Strongswan`` in version ``5.9.6`` or ``5.9.5``
+installed from this script, due to configuration Strongswan that is required.
+Only version ``5.9.5`` and ``5.9.6`` was tested with this plugin.
+
+To install the built Strongswan, please execute the following command:
+
+::
+
+ path/to/vpp/build-root/build-vpp-native/external/sswan/sudo make install
+
+Insert plugin in runtime mode
+-------------
+
+After builded this plugin and also installed Strongswan you can loaded plugin
+into Strongswan directory by:
+
+::
+
+ ./make install
+
+Or you can do manually copy ``libstrongswan-kernel-vpp.so`` into:
+``/usr/lib/ipsec/plugins`` and also ``kernel-vpp.conf`` into: ``/etc/strongswan.d/charon/``
+
+And also you should restart Strongswan by:
+
+::
+
+ systemctl restart strongswan.service
+
+Configuration Strongswan
+-------------
+In ``swanctl.conf`` file you can find example configuration to initialize
+connections between two endpoints.
+
+Copy this file into: ``/etc/swanctl/conf.d/swanctl.conf``
+
+Configuration VPP
+-------------
+
+In your ``startup.conf`` add these following commands:
+
+::
+
+ plugins {
+ plugin linux_cp_plugin.so { enable }
+ plugin ikev2_plugin.so { disable }
+ }
+
+ linux-cp {
+ lcp-sync
+ }
+
+To enable ``CP Plugin`` and disable ``IKEv2`` plugin.
+
+These following commands executed in ``VPP``:
+
+::
+
+ lcp create eth2 host-if eth2
+ set interface state eth2 up
+ set interface ip address eth2 192.168.0.2/24
+ set int state eth1 up
+ set int ip addr eth1 192.168.200.1/24
+
+To create interface by ``CP Plugin`` and also setup two ethernet interfaces.
+
+Misc
+-------------
+This plugin is based on:
+`https://github.com/matfabia/strongswan
+<https://github.com/matfabia/strongswan>`__
+
+Author: Matus Fabian <matfabia@cisco.com>
\ No newline at end of file
diff --git a/extras/strongswan/vpp_sswan/kernel-vpp.conf b/extras/strongswan/vpp_sswan/kernel-vpp.conf
new file mode 100644
index 0000000..71f50b5
--- /dev/null
+++ b/extras/strongswan/vpp_sswan/kernel-vpp.conf
@@ -0,0 +1,7 @@
+kernel-vpp {
+
+ # Whether to load the plugin. Can also be an integer to increase the
+ # priority of this plugin.
+ load = yes
+
+}
diff --git a/extras/strongswan/vpp_sswan/kernel_vpp_ipsec.c b/extras/strongswan/vpp_sswan/kernel_vpp_ipsec.c
new file mode 100644
index 0000000..7849dd6
--- /dev/null
+++ b/extras/strongswan/vpp_sswan/kernel_vpp_ipsec.c
@@ -0,0 +1,1751 @@
+/*
+ * Copyright (c) 2022 Intel and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <daemon.h>
+#include <utils/debug.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vnet/ipsec/ipsec.h>
+#include <vnet/vnet.h>
+#include <collections/hashtable.h>
+#include <threading/mutex.h>
+#include <processing/jobs/callback_job.h>
+#include <vpp-api/client/stat_client.h>
+
+#define vl_typedefs
+#define vl_endianfun
+/* Include the (first) vlib-api API definition layer */
+#include <vlibmemory/vl_memory_api_h.h>
+/* Include the current layer (third) vpp API definition layer */
+#include <vpp/api/vpe_types.api.h>
+#include <vpp/api/vpe.api.h>
+
+#include <vnet/ip-neighbor/ip_neighbor.api_enum.h>
+#include <vnet/ip-neighbor/ip_neighbor.api_types.h>
+#include <vnet/ipsec/ipsec.api_enum.h>
+#include <vnet/ipsec/ipsec.api_types.h>
+#include <vnet/interface.api_enum.h>
+#include <vnet/interface.api_types.h>
+#undef vl_typedefs
+#undef vl_endianfun
+
+#include "kernel_vpp_ipsec.h"
+#include "kernel_vpp_shared.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <net/route.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <net/if_arp.h>
+#include <sys/stat.h>
+#include <dirent.h>
+
+#define PRIO_BASE 384
+
+u32 natt_port;
+
+/**
+ * One and only instance of the daemon.
+ */
+daemon_t *charon;
+
+typedef struct private_kernel_vpp_ipsec_t private_kernel_vpp_ipsec_t;
+
+/**
+ * Private variables of kernel_vpp_ipsec class.
+ */
+struct private_kernel_vpp_ipsec_t
+{
+
+ /**
+ * Public interface
+ */
+ kernel_vpp_ipsec_t public;
+
+ /**
+ * Next security association database entry ID to allocate
+ */
+ refcount_t next_sad_id;
+
+ /**
+ * Next security policy database entry ID to allocate
+ */
+ refcount_t next_spd_id;
+
+ /**
+ * Mutex to lock access to installed policies
+ */
+ mutex_t *mutex;
+
+ /**
+ * Hash table of instaled SA, as kernel_ipsec_sa_id_t => sa_t
+ */
+ hashtable_t *sas;
+
+ /**
+ * Hash table of security policy databases, as nterface => spd_t
+ */
+ hashtable_t *spds;
+
+ /**
+ * Linked list of installed routes
+ */
+ linked_list_t *routes;
+
+ /**
+ * Next SPI to allocate
+ */
+ refcount_t nextspi;
+
+ /**
+ * Mix value to distribute SPI allocation randomly
+ */
+ uint32_t mixspi;
+
+ /**
+ * Whether to install routes along policies
+ */
+ bool install_routes;
+};
+
+/**
+ * Security association entry
+ */
+typedef struct
+{
+ /** VPP SA ID */
+ uint32_t sa_id;
+ uint32_t stat_index;
+} sa_t;
+
+/**
+ * Security policy database
+ */
+typedef struct
+{
+ /** VPP SPD ID */
+ uint32_t spd_id;
+ /** Networking interface ID restricting policy */
+ uint32_t sw_if_index;
+ /** Policy count for this SPD */
+ refcount_t policy_num;
+} spd_t;
+
+/**
+ * Installed route
+ */
+typedef struct
+{
+ /** Name of the interface the route is bound to */
+ char *if_name;
+ /** Gateway of route */
+ host_t *gateway;
+ /** Destination network of route */
+ host_t *dst_net;
+ /** Prefix length of dst_net */
+ uint8_t prefixlen;
+ /** References for route */
+ refcount_t refs;
+} route_entry_t;
+
+#define htonll(x) \
+ ((1 == htonl (1)) ? \
+ (x) : \
+ ((uint64_t) htonl ((x) &0xFFFFFFFF) << 32) | htonl ((x) >> 32))
+#define ntohll(x) \
+ ((1 == ntohl (1)) ? \
+ (x) : \
+ ((uint64_t) ntohl ((x) &0xFFFFFFFF) << 32) | ntohl ((x) >> 32))
+
+CALLBACK (route_equals, bool, route_entry_t *a, va_list args)
+{
+ host_t *dst_net, *gateway;
+ uint8_t *prefixlen;
+ char *if_name;
+
+ VA_ARGS_VGET (args, if_name, gateway, dst_net, prefixlen);
+
+ return a->if_name && if_name && streq (a->if_name, if_name) &&
+ a->gateway->ip_equals (a->gateway, gateway) &&
+ a->dst_net->ip_equals (a->dst_net, dst_net) &&
+ a->prefixlen == *prefixlen;
+}
+
+/**
+ * Clean up a route entry
+ */
+static void
+route_destroy (route_entry_t *this)
+{
+ this->dst_net->destroy (this->dst_net);
+ this->gateway->destroy (this->gateway);
+ free (this->if_name);
+ free (this);
+}
+
+static uint32_t get_sw_if_index ();
+
+static int
+set_arp (char *ipStr, char *if_name, bool add)
+{
+ char *out = NULL;
+ int out_len = 0;
+ vl_api_ip_neighbor_add_del_t *mp;
+ vl_api_ip_neighbor_add_del_reply_t *rmp;
+ int rc = SUCCESS;
+ uint32_t sw_if_index = ~0;
+
+ FILE *fp;
+ int nread = 0;
+ ssize_t len = 0;
+ char *buffer = NULL;
+ char buf[2][20];
+ char *file = "/proc/net/arp";
+ unsigned char mac[8] = {
+ 0,
+ };
+ uint32_t addr;
+
+ if (if_name == NULL || ipStr == NULL)
+ {
+ DBG2 (DBG_KNL, "para is null\n");
+ rc = FAILED;
+ }
+ DBG2 (DBG_KNL, "from kernel read mac\n");
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+ sw_if_index = get_sw_if_index (if_name);
+ if (sw_if_index == ~0)
+ {
+ DBG1 (DBG_KNL, "sw_if_index for %s not found", if_name);
+ goto error;
+ }
+
+ fp = fopen (file, "rb");
+ while ((nread = getline (&buffer, &len, fp)) != -1)
+ {
+ sscanf (buffer, "%s %*s %*s %s %*s %*s", &buf[0], &buf[1]);
+ inet_aton (&buf[0], &addr);
+
+ if (addr == *((u32 *) (ipStr)))
+ {
+ sscanf (buf[1], "%02x:%02x:%02x:%02x:%02x:%02x", &mac[0], &mac[1],
+ &mac[2], &mac[3], &mac[4], &mac[5]);
+ u16 msg_id =
+ vl_msg_api_get_msg_index ((u8 *) "ip_neighbor_add_del_0607c257");
+ mp->_vl_msg_id = htons (msg_id);
+ mp->is_add = add;
+ memcpy (mp->neighbor.ip_address.un.ip4, (u8 *) &addr, sizeof (addr));
+ mp->neighbor.ip_address.af = 0;
+ memcpy (mp->neighbor.mac_address, mac, 6);
+ mp->neighbor.sw_if_index = htonl (sw_if_index);
+ mp->neighbor.flags = 1;
+
+ if (vac->send (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG1 (DBG_KNL, "vac %s neighbor entry",
+ add ? "adding" : "removing");
+ goto error;
+ }
+ rmp = (void *) out;
+ if (rmp->retval)
+ {
+ DBG1 (DBG_KNL, "%s neighbor add rv:%d", add ? "add" : "remove",
+ ntohl (rmp->retval));
+ goto error;
+ }
+ fclose (fp);
+ return rc;
+ }
+ }
+ return rc;
+
+error:
+ free (out);
+ vl_msg_api_free (mp);
+ return rc;
+}
+
+static int
+add_Route (char *ipAddr, int len, char *mask, char *gateWay)
+{
+ int fd;
+ int rc = SUCCESS;
+ struct sockaddr_in _sin;
+ struct sockaddr_in *sin = &_sin;
+ struct rtentry rt;
+
+ do
+ {
+ fd = socket (AF_INET, SOCK_DGRAM, 0);
+ if (fd < 0)
+ {
+ DBG2 (DBG_KNL, "addRoute: socket error\n");
+ rc = FAILED;
+ break;
+ }
+ memset (&rt, 0, sizeof (struct rtentry));
+ memset (sin, 0, sizeof (struct sockaddr_in));
+ sin->sin_family = AF_INET;
+ sin->sin_port = 0;
+
+ if (inet_aton (gateWay, &sin->sin_addr) < 0)
+ {
+ rc = FAILED;
+ break;
+ }
+ memcpy (&rt.rt_gateway, sin, sizeof (struct sockaddr_in));
+
+ ((struct sockaddr_in *) &rt.rt_dst)->sin_family = AF_INET;
+ memcpy (&((struct sockaddr_in *) &rt.rt_dst)->sin_addr, ipAddr, len);
+
+ ((struct sockaddr_in *) &rt.rt_genmask)->sin_family = AF_INET;
+ if (inet_aton (mask,
+ &((struct sockaddr_in *) &rt.rt_genmask)->sin_addr) < 0)
+ {
+ rc = FAILED;
+ break;
+ }
+ rt.rt_flags = RTF_GATEWAY;
+ if (ioctl (fd, SIOCADDRT, &rt) < 0)
+ {
+ rc = FAILED;
+ }
+ }
+ while (0);
+
+ close (fd);
+ return rc;
+}
+
+static int
+set_address (u32 ipAddr, u32 sw_if_index, bool add)
+{
+ char *out = NULL;
+ int out_len = 0;
+ vl_api_sw_interface_add_del_address_t *mp;
+ vl_api_sw_interface_add_del_address_reply_t *rmp;
+
+ int rc = SUCCESS;
+
+ uint32_t addr;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+
+ u16 msg_id =
+ vl_msg_api_get_msg_index ((u8 *) "sw_interface_add_del_address_5463d73b");
+ mp->_vl_msg_id = htons (msg_id);
+ mp->is_add = add;
+ memcpy (mp->prefix.address.un.ip4, (u8 *) &ipAddr, sizeof (ipAddr));
+ mp->prefix.len = 24;
+ mp->sw_if_index = sw_if_index;
+
+ if (vac->send (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG2 (DBG_KNL, "vac %s neighbor entry", add ? "adding" : "removing");
+ goto error;
+ }
+ rmp = (void *) out;
+ if (rmp->retval)
+ {
+ DBG2 (DBG_KNL, "%s neighbor add rv:%d", add ? "add" : "remove",
+ ntohl (rmp->retval));
+ goto error;
+ }
+ return rc;
+
+error:
+ free (out);
+ vl_msg_api_free (mp);
+ return rc;
+}
+
+/**
+ * (Un)-install a single route
+ */
+static void
+manage_route (private_kernel_vpp_ipsec_t *this, bool add,
+ traffic_selector_t *dst_ts, host_t *src, host_t *dst)
+{
+ host_t *dst_net, *gateway;
+ uint8_t prefixlen;
+ char *if_name;
+ route_entry_t *route;
+ bool route_exist = FALSE;
+
+ char *netmask = "255.255.255.0";
+ char *tap_gateway = "1.1.1.1";
+ int arp_rc = 0;
+ if (dst->is_anyaddr (dst))
+ {
+ return;
+ }
+ gateway =
+ charon->kernel->get_nexthop (charon->kernel, dst, -1, NULL, &if_name);
+ dst_ts->to_subnet (dst_ts, &dst_net, &prefixlen);
+ if (!if_name)
+ {
+ if (src->is_anyaddr (src))
+ {
+ return;
+ }
+ if (!charon->kernel->get_interface (charon->kernel, src, &if_name))
+ {
+ return;
+ }
+ }
+ route_exist =
+ this->routes->find_first (this->routes, route_equals, (void **) &route,
+ if_name, gateway, dst_net, &prefixlen);
+ if (add)
+ {
+ DBG2 (DBG_KNL, "installing route: %H/%d via %H dev %s", dst_net,
+ prefixlen, gateway, if_name);
+ if (route_exist)
+ {
+ unsigned int refs_num = ref_get (&route->refs);
+ DBG2 (DBG_KNL, "add route but it exist %d", refs_num);
+ }
+ else
+ {
+ INIT (route, .if_name = strdup (if_name),
+ .gateway = gateway->clone (gateway),
+ .dst_net = dst_net->clone (dst_net), .prefixlen = prefixlen,
+ .refs = 1, );
+ this->routes->insert_last (this->routes, route);
+ charon->kernel->add_route (charon->kernel,
+ dst_net->get_address (dst_net), prefixlen,
+ gateway, dst, if_name, 1);
+ }
+
+ add_Route (dst_net->get_address (dst_net).ptr,
+ dst_net->get_address (dst_net).len, netmask, tap_gateway);
+
+ arp_rc = set_arp (gateway->get_address (gateway).ptr, if_name, TRUE);
+ if (arp_rc)
+ DBG2 (DBG_KNL, "arpGet success!\n");
+ }
+ else
+ {
+ DBG2 (DBG_KNL, "uninstalling route: %H/%d via %H dev %s", dst_net,
+ prefixlen, gateway, if_name);
+ if (!route_exist)
+ {
+ DBG2 (DBG_KNL, "del route but it not exist");
+ return;
+ }
+ if (ref_put (&route->refs))
+ {
+ this->routes->remove (this->routes, route, NULL);
+ route_destroy (route);
+ charon->kernel->del_route (charon->kernel,
+ dst_net->get_address (dst_net), prefixlen,
+ gateway, dst, if_name, 1);
+ }
+ }
+}
+
+/**
+ * Hash function for IPsec SA
+ */
+static u_int
+sa_hash (kernel_ipsec_sa_id_t *sa)
+{
+ return chunk_hash_inc (
+ sa->src->get_address (sa->src),
+ chunk_hash_inc (
+ sa->dst->get_address (sa->dst),
+ chunk_hash_inc (chunk_from_thing (sa->spi),
+ chunk_hash (chunk_from_thing (sa->proto)))));
+}
+
+/**
+ * Equality function for IPsec SA
+ */
+static bool
+sa_equals (kernel_ipsec_sa_id_t *sa, kernel_ipsec_sa_id_t *other_sa)
+{
+ return sa->src->ip_equals (sa->src, other_sa->src) &&
+ sa->dst->ip_equals (sa->dst, other_sa->dst) &&
+ sa->spi == other_sa->spi && sa->proto == other_sa->proto;
+}
+
+/**
+ * Hash function for interface
+ */
+static u_int
+interface_hash (char *interface)
+{
+ return chunk_hash (chunk_from_str (interface));
+}
+
+/**
+ * Equality function for interface
+ */
+static bool
+interface_equals (char *interface1, char *interface2)
+{
+ return streq (interface1, interface2);
+}
+
+/**
+ * Map an integer x with a one-to-one function using quadratic residues
+ */
+static u_int
+permute (u_int x, u_int p)
+{
+ u_int qr;
+
+ x = x % p;
+ qr = ((uint64_t) x * x) % p;
+ if (x <= p / 2)
+ {
+ return qr;
+ }
+ return p - qr;
+}
+
+/**
+ * Initialize seeds for SPI generation
+ */
+static bool
+init_spi (private_kernel_vpp_ipsec_t *this)
+{
+ bool ok = TRUE;
+ rng_t *rng;
+
+ rng = lib->crypto->create_rng (lib->crypto, RNG_STRONG);
+ if (!rng)
+ {
+ return FALSE;
+ }
+ ok =
+ rng->get_bytes (rng, sizeof (this->nextspi), (uint8_t *) &this->nextspi);
+ if (ok)
+ {
+ ok =
+ rng->get_bytes (rng, sizeof (this->mixspi), (uint8_t *) &this->mixspi);
+ }
+ rng->destroy (rng);
+ return ok;
+}
+
+/**
+ * Calculate policy priority
+ */
+static uint32_t
+calculate_priority (policy_priority_t policy_priority, traffic_selector_t *src,
+ traffic_selector_t *dst)
+{
+ uint32_t priority = PRIO_BASE;
+ uint16_t port;
+ uint8_t mask, proto;
+ host_t *net;
+
+ switch (policy_priority)
+ {
+ case POLICY_PRIORITY_FALLBACK:
+ priority <<= 1;
+ /* fall-through */
+ case POLICY_PRIORITY_ROUTED:
+ priority <<= 1;
+ /* fall-through */
+ case POLICY_PRIORITY_DEFAULT:
+ priority <<= 1;
+ /* fall-through */
+ case POLICY_PRIORITY_PASS:
+ break;
+ }
+ /* calculate priority based on selector size, small size = high prio */
+ src->to_subnet (src, &net, &mask);
+ priority -= mask;
+ proto = src->get_protocol (src);
+ port = net->get_port (net);
+ net->destroy (net);
+
+ dst->to_subnet (dst, &net, &mask);
+ priority -= mask;
+ proto = max (proto, dst->get_protocol (dst));
+ port = max (port, net->get_port (net));
+ net->destroy (net);
+
+ priority <<= 2; /* make some room for the two flags */
+ priority += port ? 0 : 2;
+ priority += proto ? 0 : 1;
+ return priority;
+}
+
+/**
+ * Get sw_if_index from interface name
+ */
+static uint32_t
+get_sw_if_index (char *interface)
+{
+ char *out = NULL;
+ int out_len, name_filter_len = 0, msg_len = 0;
+ vl_api_sw_interface_dump_t *mp;
+ vl_api_sw_interface_details_t *rmp;
+ uint32_t sw_if_index = ~0;
+
+ name_filter_len = strlen (interface);
+ msg_len = sizeof (*mp) + name_filter_len;
+ mp = vl_msg_api_alloc (msg_len);
+ clib_memset (mp, 0, msg_len);
+ u16 msg_id = vl_msg_api_get_msg_index ((u8 *) "sw_interface_dump_aa610c27");
+ mp->_vl_msg_id = htons (msg_id);
+ mp->name_filter_valid = TRUE;
+ mp->name_filter.length = htonl (name_filter_len);
+ memcpy ((char *) mp->name_filter.buf, interface, name_filter_len);
+
+ if (vac->send (vac, (char *) mp, msg_len, &out, &out_len))
+ {
+ goto error;
+ }
+ if (!out_len)
+ {
+ goto error;
+ }
+ rmp = (vl_api_sw_interface_details_t *) out;
+ sw_if_index = ntohl (rmp->sw_if_index);
+
+error:
+ free (out);
+ vl_msg_api_free (mp);
+ return sw_if_index;
+}
+/**
+ * (Un)-install a security policy database
+ */
+static status_t
+spd_add_del (bool add, uint32_t spd_id)
+{
+ char *out = NULL;
+ int out_len;
+ vl_api_ipsec_spd_add_del_t *mp;
+ vl_api_ipsec_spd_add_del_reply_t *rmp;
+ status_t rv = FAILED;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+
+ u16 msg_id = vl_msg_api_get_msg_index ((u8 *) "ipsec_spd_add_del_20e89a95");
+ mp->_vl_msg_id = htons (msg_id);
+ mp->is_add = add;
+ mp->spd_id = htonl (spd_id);
+ if (vac->send (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG1 (DBG_KNL, "vac %s SPD failed", add ? "adding" : "removing");
+ goto error;
+ }
+ rmp = (void *) out;
+ if (rmp->retval)
+ {
+ DBG1 (DBG_KNL, "%s SPD failed rv:%d", add ? "add" : "remove",
+ ntohl (rmp->retval));
+ goto error;
+ }
+ rv = SUCCESS;
+
+error:
+ free (out);
+ vl_msg_api_free (mp);
+ return rv;
+}
+
+/**
+ * Enable or disable SPD on an insterface
+ */
+static status_t
+interface_add_del_spd (bool add, uint32_t spd_id, uint32_t sw_if_index)
+{
+ char *out = NULL;
+ int out_len;
+ vl_api_ipsec_interface_add_del_spd_t *mp;
+ vl_api_ipsec_interface_add_del_spd_reply_t *rmp;
+ status_t rv = FAILED;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+ u16 msg_id =
+ vl_msg_api_get_msg_index ((u8 *) "ipsec_interface_add_del_spd_80f80cbb");
+ mp->_vl_msg_id = htons (msg_id);
+ mp->is_add = add;
+ mp->spd_id = htonl (spd_id);
+ mp->sw_if_index = htonl (sw_if_index);
+ if (vac->send (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG1 (DBG_KNL, "vac %s interface SPD failed",
+ add ? "adding" : "removing");
+ goto error;
+ }
+ rmp = (void *) out;
+ if (rmp->retval)
+ {
+ DBG1 (DBG_KNL, "%s interface SPD failed rv:%d", add ? "add" : "remove",
+ ntohl (rmp->retval));
+ goto error;
+ }
+ rv = SUCCESS;
+
+error:
+ free (out);
+ vl_msg_api_free (mp);
+ return rv;
+}
+
+static int
+bypass_all (bool add, uint32_t spd_id, uint32_t sa_id)
+{
+ vl_api_ipsec_spd_entry_add_del_t *mp;
+ vl_api_ipsec_spd_entry_add_del_reply_t *rmp;
+ char *out = NULL;
+ int out_len;
+ status_t rv = FAILED;
+
+ DBG2 (DBG_KNL, "bypass_all [%s] spd_id %d sa_id %d", add ? "ADD" : "DEL",
+ spd_id, sa_id);
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+
+ u16 msg_id =
+ vl_msg_api_get_msg_index ((u8 *) "ipsec_spd_entry_add_del_338b7411");
+ mp->_vl_msg_id = ntohs (msg_id);
+ mp->is_add = add;
+ mp->entry.sa_id = ntohl (sa_id);
+ mp->entry.spd_id = ntohl (spd_id);
+ mp->entry.priority = ntohl (INT_MAX - POLICY_PRIORITY_PASS - 1);
+ mp->entry.is_outbound = 0;
+ mp->entry.policy = ntohl (IPSEC_API_SPD_ACTION_BYPASS);
+ memset (mp->entry.local_address_stop.un.ip6, 0xFF, 16);
+ memset (mp->entry.remote_address_stop.un.ip6, 0xFF, 16);
+ mp->entry.remote_port_start = mp->entry.local_port_start = ntohs (0);
+ mp->entry.remote_port_stop = mp->entry.local_port_stop = ntohs (0xFFFF);
+ mp->entry.protocol = IP_API_PROTO_ESP;
+ if (vac->send (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG1 (DBG_KNL, "vac %s SPD entry failed", add ? "adding" : "removing");
+ goto error;
+ }
+ rmp = (void *) out;
+ if (rmp->retval)
+ {
+ DBG1 (DBG_KNL, "%s SPD entry failed rv:%d", add ? "add" : "remove",
+ ntohl (rmp->retval));
+ goto error;
+ }
+ mp->entry.is_outbound = 1;
+ if (vac->send (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG1 (DBG_KNL, "vac %s SPD entry failed", add ? "adding" : "removing");
+ goto error;
+ }
+ rmp = (void *) out;
+ if (rmp->retval)
+ {
+ DBG1 (DBG_KNL, "%s SPD entry failed rv:%d", add ? "add" : "remove",
+ ntohl (rmp->retval));
+ goto error;
+ }
+ mp->entry.is_outbound = 0;
+ mp->entry.protocol = IP_API_PROTO_AH;
+ if (vac->send (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG1 (DBG_KNL, "vac %s SPD entry failed", add ? "adding" : "removing");
+ goto error;
+ }
+ rmp = (void *) out;
+ if (rmp->retval)
+ {
+ DBG1 (DBG_KNL, "%s SPD entry failed rv:%d", add ? "add" : "remove",
+ ntohl (rmp->retval));
+ goto error;
+ }
+ mp->entry.is_outbound = 1;
+ if (vac->send (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG1 (DBG_KNL, "vac %s SPD entry failed", add ? "adding" : "removing");
+ goto error;
+ }
+ rmp = (void *) out;
+ if (rmp->retval)
+ {
+ DBG1 (DBG_KNL, "%s SPD entry failed rv:%d", add ? "add" : "remove",
+ ntohl (rmp->retval));
+ goto error;
+ }
+
+ rv = SUCCESS;
+
+error:
+ if (out)
+ free (out);
+ vl_msg_api_free (mp);
+
+ return rv;
+}
+
+static int
+bypass_port (bool add, uint32_t spd_id, uint32_t sa_id, uint16_t port)
+{
+ vl_api_ipsec_spd_entry_add_del_t *mp;
+ vl_api_ipsec_spd_entry_add_del_reply_t *rmp;
+ char *out = NULL;
+ int out_len;
+ status_t rv = FAILED;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+
+ u16 msg_id =
+ vl_msg_api_get_msg_index ((u8 *) "ipsec_spd_entry_add_del_338b7411");
+ mp->_vl_msg_id = ntohs (msg_id);
+ mp->is_add = add;
+ mp->entry.sa_id = ntohl (sa_id);
+ mp->entry.spd_id = ntohl (spd_id);
+ mp->entry.priority = ntohl (INT_MAX - POLICY_PRIORITY_PASS - 1);
+ mp->entry.policy = ntohl (IPSEC_API_SPD_ACTION_BYPASS);
+ memset (mp->entry.local_address_stop.un.ip6, 0xFF, 16);
+ memset (mp->entry.remote_address_stop.un.ip6, 0xFF, 16);
+ mp->entry.is_outbound = 0;
+ mp->entry.remote_port_start = mp->entry.local_port_start = ntohs (0);
+ mp->entry.remote_port_stop = mp->entry.local_port_stop = ntohs (0xFFFF);
+ mp->entry.protocol = IP_API_PROTO_HOPOPT;
+
+ if (vac->send (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG1 (DBG_KNL, "vac %s SPD entry failed", add ? "adding" : "removing");
+ goto error;
+ }
+ rmp = (void *) out;
+ if (rmp->retval)
+ {
+ DBG1 (DBG_KNL, "%s SPD entry failed rv:%d", add ? "add" : "remove",
+ ntohl (rmp->retval));
+ goto error;
+ }
+ mp->entry.is_outbound = 1;
+ if (vac->send (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG1 (DBG_KNL, "vac %s SPD entry failed", add ? "adding" : "removing");
+ goto error;
+ }
+ rmp = (void *) out;
+ if (rmp->retval)
+ {
+ DBG1 (DBG_KNL, "%s SPD entry failed rv:%d", add ? "add" : "remove",
+ ntohl (rmp->retval));
+ goto error;
+ }
+ rv = SUCCESS;
+
+error:
+ if (out)
+ free (out);
+ vl_msg_api_free (mp);
+
+ return rv;
+}
+
+/**
+ * Add or remove a bypass policy
+ */
+static status_t
+manage_bypass (bool add, uint32_t spd_id, uint32_t sa_id)
+{
+ uint16_t port;
+ status_t rv;
+
+ bypass_all (add, spd_id, sa_id);
+
+ port =
+ lib->settings->get_int (lib->settings, "%s.port", IKEV2_UDP_PORT, lib->ns);
+
+ if (port)
+ {
+ rv = bypass_port (add, spd_id, sa_id, port);
+ if (rv != SUCCESS)
+ {
+ return rv;
+ }
+ }
+
+ port = lib->settings->get_int (lib->settings, "%s.port_nat_t",
+ IKEV2_NATT_PORT, lib->ns);
+ if (port)
+ {
+ rv = bypass_port (add, spd_id, sa_id, port);
+ if (rv != SUCCESS)
+ {
+ return rv;
+ }
+ }
+
+ return SUCCESS;
+}
+
+/**
+ * Add or remove a policy
+ */
+static status_t
+manage_policy (private_kernel_vpp_ipsec_t *this, bool add,
+ kernel_ipsec_policy_id_t *id,
+ kernel_ipsec_manage_policy_t *data)
+{
+ spd_t *spd;
+ char *out = NULL, *interface = NULL;
+ int out_len;
+ uint32_t sw_if_index, spd_id = ~0, sad_id = ~0;
+ status_t rv = FAILED;
+ uint32_t priority, auto_priority;
+ chunk_t src_from, src_to, dst_from, dst_to;
+ host_t *src, *dst, *addr;
+ vl_api_ipsec_spd_entry_add_del_t *mp;
+ vl_api_ipsec_spd_entry_add_del_reply_t *rmp;
+ bool n_spd = false;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+
+ this->mutex->lock (this->mutex);
+ if (!id->interface)
+ {
+ addr = id->dir == POLICY_IN ? data->dst : data->src;
+ for (int i = 0; i < 5; i++)
+ {
+ if (!charon->kernel->get_interface (charon->kernel, addr,
+ &interface))
+ {
+ DBG1 (DBG_KNL, "policy no interface %H", addr);
+ interface = NULL;
+ sleep (1);
+ }
+
+ if (interface)
+ {
+ DBG1 (DBG_KNL, "policy have interface %H", addr);
+ break;
+ }
+ }
+ if (!interface)
+ goto error;
+ id->interface = interface;
+ }
+
+ DBG2 (DBG_KNL, "manage policy [%s] interface [%s]", add ? "ADD" : "DEL",
+ id->interface);
+
+ spd = this->spds->get (this->spds, id->interface);
+ if (!spd)
+ {
+ if (!add)
+ {
+ DBG1 (DBG_KNL, "SPD for %s not found, should not be deleted",
+ id->interface);
+ goto error;
+ }
+ sw_if_index = get_sw_if_index (id->interface);
+ DBG1 (DBG_KNL, "firstly created, spd for %s found sw_if_index is %d",
+ id->interface, sw_if_index);
+ if (sw_if_index == ~0)
+ {
+ DBG1 (DBG_KNL, "sw_if_index for %s not found", id->interface);
+ goto error;
+ }
+ spd_id = ref_get (&this->next_spd_id);
+ if (spd_add_del (TRUE, spd_id))
+ {
+ DBG1 (DBG_KNL, "spd_add_del %d failed!!!!!", spd_id);
+ goto error;
+ }
+ if (interface_add_del_spd (TRUE, spd_id, sw_if_index))
+ {
+ DBG1 (DBG_KNL, "interface_add_del_spd %d %d failed!!!!!", spd_id,
+ sw_if_index);
+ goto error;
+ }
+ INIT (spd, .spd_id = spd_id, .sw_if_index = sw_if_index,
+ .policy_num = 0, );
+ this->spds->put (this->spds, id->interface, spd);
+ n_spd = true;
+ }
+
+ auto_priority = calculate_priority (data->prio, id->src_ts, id->dst_ts);
+ priority = data->manual_prio ? data->manual_prio : auto_priority;
+
+ u16 msg_id =
+ vl_msg_api_get_msg_index ((u8 *) "ipsec_spd_entry_add_del_338b7411");
+ mp->_vl_msg_id = htons (msg_id);
+ mp->is_add = add;
+ mp->entry.spd_id = htonl (spd->spd_id);
+ mp->entry.priority = htonl (INT_MAX - POLICY_PRIORITY_PASS);
+ mp->entry.is_outbound = id->dir == POLICY_OUT;
+ switch (data->type)
+ {
+ case POLICY_IPSEC:
+ mp->entry.policy = htonl (IPSEC_API_SPD_ACTION_PROTECT);
+ break;
+ case POLICY_PASS:
+ mp->entry.policy = htonl (IPSEC_API_SPD_ACTION_BYPASS);
+ break;
+ case POLICY_DROP:
+ mp->entry.policy = htonl (IPSEC_API_SPD_ACTION_DISCARD);
+ break;
+ }
+ if ((data->type == POLICY_IPSEC) && data->sa)
+ {
+ kernel_ipsec_sa_id_t id = {
+ .src = data->src,
+ .dst = data->dst,
+ .proto = data->sa->esp.use ? IPPROTO_ESP : IPPROTO_AH,
+ .spi = data->sa->esp.use ? data->sa->esp.spi : data->sa->ah.spi,
+ };
+ sa_t *sa = NULL;
+ sa = this->sas->get (this->sas, &id);
+ if (!sa)
+ {
+ DBG1 (DBG_KNL, "SA ID not found");
+ goto error;
+ }
+ sad_id = sa->sa_id;
+ if (n_spd)
+ {
+ if (manage_bypass (TRUE, spd_id, ~0))
+ {
+ DBG1 (DBG_KNL, "manage_bypass %d failed!!!!", spd_id);
+ goto error;
+ }
+ }
+ }
+
+ mp->entry.sa_id = htonl (sad_id);
+
+ bool is_ipv6 = false;
+ if (id->src_ts->get_type (id->src_ts) == TS_IPV6_ADDR_RANGE)
+ {
+ is_ipv6 = true;
+ mp->entry.local_address_start.af = htonl (ADDRESS_IP6);
+ mp->entry.local_address_stop.af = htonl (ADDRESS_IP6);
+ mp->entry.remote_address_start.af = htonl (ADDRESS_IP6);
+ mp->entry.remote_address_stop.af = htonl (ADDRESS_IP6);
+ }
+ else
+ {
+ mp->entry.local_address_start.af = htonl (ADDRESS_IP4);
+ mp->entry.local_address_stop.af = htonl (ADDRESS_IP4);
+ mp->entry.remote_address_start.af = htonl (ADDRESS_IP4);
+ mp->entry.remote_address_stop.af = htonl (ADDRESS_IP4);
+ }
+ mp->entry.protocol = id->src_ts->get_protocol (id->src_ts);
+
+ if (id->dir == POLICY_OUT)
+ {
+ src_from = id->src_ts->get_from_address (id->src_ts);
+ src_to = id->src_ts->get_to_address (id->src_ts);
+ src = host_create_from_chunk (is_ipv6 ? AF_INET6 : AF_INET, src_to, 0);
+ dst_from = id->dst_ts->get_from_address (id->dst_ts);
+ dst_to = id->dst_ts->get_to_address (id->dst_ts);
+ dst = host_create_from_chunk (is_ipv6 ? AF_INET6 : AF_INET, dst_to, 0);
+ }
+ else
+ {
+ dst_from = id->src_ts->get_from_address (id->src_ts);
+ dst_to = id->src_ts->get_to_address (id->src_ts);
+ dst = host_create_from_chunk (is_ipv6 ? AF_INET6 : AF_INET, dst_from, 0);
+ src_from = id->dst_ts->get_from_address (id->dst_ts);
+ src_to = id->dst_ts->get_to_address (id->dst_ts);
+ src = host_create_from_chunk (is_ipv6 ? AF_INET6 : AF_INET, src_from, 0);
+ }
+
+ if (src->is_anyaddr (src) && dst->is_anyaddr (dst))
+ {
+ memset (mp->entry.local_address_stop.un.ip6, 0xFF, 16);
+ memset (mp->entry.remote_address_stop.un.ip6, 0xFF, 16);
+ }
+ else
+ {
+ memcpy (is_ipv6 ? mp->entry.local_address_start.un.ip6 :
+ mp->entry.local_address_start.un.ip4,
+ src_from.ptr, src_from.len);
+ memcpy (is_ipv6 ? mp->entry.local_address_stop.un.ip6 :
+ mp->entry.local_address_stop.un.ip4,
+ src_to.ptr, src_to.len);
+ memcpy (is_ipv6 ? mp->entry.remote_address_start.un.ip6 :
+ mp->entry.remote_address_start.un.ip4,
+ dst_from.ptr, dst_from.len);
+ memcpy (is_ipv6 ? mp->entry.remote_address_stop.un.ip6 :
+ mp->entry.remote_address_stop.un.ip4,
+ dst_to.ptr, dst_to.len);
+ }
+ mp->entry.local_port_start = htons (id->src_ts->get_from_port (id->src_ts));
+ mp->entry.local_port_stop = htons (id->src_ts->get_to_port (id->src_ts));
+ mp->entry.remote_port_start = htons (id->dst_ts->get_from_port (id->dst_ts));
+ mp->entry.remote_port_stop = htons (id->dst_ts->get_to_port (id->dst_ts));
+
+ if (vac->send (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG1 (DBG_KNL, "vac %s SPD entry failed", add ? "adding" : "removing");
+ goto error;
+ }
+ rmp = (void *) out;
+ if (rmp->retval)
+ {
+ DBG1 (DBG_KNL, "%s SPD entry failed rv:%d", add ? "add" : "remove",
+ ntohl (rmp->retval));
+ goto error;
+ }
+
+ if (add)
+ {
+ ref_get (&spd->policy_num);
+ }
+ else
+ {
+ if (ref_put (&spd->policy_num))
+ {
+ DBG1 (
+ DBG_KNL,
+ "policy_num's ref is 0, delete spd_id %d sw_if_index %d sad_id %x",
+ spd->spd_id, spd->sw_if_index, sad_id);
+ interface_add_del_spd (FALSE, spd->spd_id, spd->sw_if_index);
+ manage_bypass (FALSE, spd->spd_id, sad_id);
+ spd_add_del (FALSE, spd->spd_id);
+ this->spds->remove (this->spds, id->interface);
+ }
+ }
+
+ if (this->install_routes && id->dir == POLICY_OUT && !mp->entry.protocol)
+ {
+ if (data->type == POLICY_IPSEC && data->sa->mode != MODE_TRANSPORT)
+ {
+ manage_route (this, add, id->dst_ts, data->src, data->dst);
+ }
+ }
+ rv = SUCCESS;
+error:
+ free (out);
+ vl_msg_api_free (mp);
+ this->mutex->unlock (this->mutex);
+ return rv;
+}
+
+METHOD (kernel_ipsec_t, get_features, kernel_feature_t,
+ private_kernel_vpp_ipsec_t *this)
+{
+ return KERNEL_ESP_V3_TFC;
+}
+
+METHOD (kernel_ipsec_t, get_spi, status_t, private_kernel_vpp_ipsec_t *this,
+ host_t *src, host_t *dst, uint8_t protocol, uint32_t *spi)
+{
+ static const u_int p = 268435399, offset = 0xc0000000;
+
+ *spi = htonl (offset + permute (ref_get (&this->nextspi) ^ this->mixspi, p));
+ return SUCCESS;
+}
+
+METHOD (kernel_ipsec_t, get_cpi, status_t, private_kernel_vpp_ipsec_t *this,
+ host_t *src, host_t *dst, uint16_t *cpi)
+{
+ DBG1 (DBG_KNL, "get_cpi is not supported!!!!!!!!!!!!!!!!!!!!!!!!");
+ return NOT_SUPPORTED;
+}
+
+/**
+ * Helper struct for expiration events
+ */
+typedef struct
+{
+
+ private_kernel_vpp_ipsec_t *manager;
+
+ kernel_ipsec_sa_id_t *sa_id;
+
+ /**
+ * 0 if this is a hard expire, otherwise the offset in s (soft->hard)
+ */
+ uint32_t hard_offset;
+
+} vpp_sa_expired_t;
+
+/**
+ * Callback for expiration events
+ */
+static job_requeue_t
+sa_expired (vpp_sa_expired_t *expired)
+{
+ private_kernel_vpp_ipsec_t *this = expired->manager;
+ sa_t *sa;
+ kernel_ipsec_sa_id_t *id = expired->sa_id;
+
+ this->mutex->lock (this->mutex);
+ sa = this->sas->get (this->sas, id);
+
+ if (sa)
+ {
+ charon->kernel->expire (charon->kernel, id->proto, id->spi, id->dst,
+ FALSE);
+ }
+
+ free (id);
+ this->mutex->unlock (this->mutex);
+ return JOB_REQUEUE_NONE;
+}
+
+/**
+ * Schedule a job to handle IPsec SA expiration
+ */
+static void
+schedule_expiration (private_kernel_vpp_ipsec_t *this,
+ kernel_ipsec_add_sa_t *entry,
+ kernel_ipsec_sa_id_t *entry2)
+{
+ lifetime_cfg_t *lifetime = entry->lifetime;
+ vpp_sa_expired_t *expired;
+ callback_job_t *job;
+ uint32_t timeout;
+ kernel_ipsec_sa_id_t *id;
+
+ if (!lifetime->time.life)
+ { /* no expiration at all */
+ return;
+ }
+
+ INIT (id, .src = entry2->src->clone (entry2->src),
+ .dst = entry2->dst->clone (entry2->dst), .spi = entry2->spi,
+ .proto = entry2->proto, );
+
+ INIT (expired, .manager = this, .sa_id = id, );
+
+ /* schedule a rekey first, a hard timeout will be scheduled then, if any */
+ expired->hard_offset = lifetime->time.life - lifetime->time.rekey;
+ timeout = lifetime->time.rekey;
+
+ if (lifetime->time.life <= lifetime->time.rekey || lifetime->time.rekey == 0)
+ { /* no rekey, schedule hard timeout */
+ expired->hard_offset = 0;
+ timeout = lifetime->time.life;
+ }
+
+ job = callback_job_create ((callback_job_cb_t) sa_expired, expired,
+ (callback_job_cleanup_t) free, NULL);
+ lib->scheduler->schedule_job (lib->scheduler, (job_t *) job, timeout);
+}
+
+METHOD (kernel_ipsec_t, add_sa, status_t, private_kernel_vpp_ipsec_t *this,
+ kernel_ipsec_sa_id_t *id, kernel_ipsec_add_sa_t *data)
+{
+ char *out = NULL;
+ int out_len;
+ vl_api_ipsec_sad_entry_add_del_t *mp;
+ vl_api_ipsec_sad_entry_add_del_reply_t *rmp;
+ uint32_t sad_id = ref_get (&this->next_sad_id);
+ uint8_t ca = 0, ia = 0;
+ status_t rv = FAILED;
+ chunk_t src, dst;
+ kernel_ipsec_sa_id_t *sa_id;
+ sa_t *sa;
+ int key_len = data->enc_key.len;
+
+ if ((data->enc_alg == ENCR_AES_CTR) ||
+ (data->enc_alg == ENCR_AES_GCM_ICV8) ||
+ (data->enc_alg == ENCR_AES_GCM_ICV12) ||
+ (data->enc_alg == ENCR_AES_GCM_ICV16))
+ {
+ static const int SALT_SIZE =
+ 4; /* See how enc_size is calculated at keymat_v2.derive_child_keys */
+ key_len = key_len - SALT_SIZE;
+ }
+ natt_port = lib->settings->get_int (
+ lib->settings, "%s.plugins.socket-default.natt", IKEV2_NATT_PORT, lib->ns);
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+ u16 msg_id =
+ vl_msg_api_get_msg_index ((u8 *) "ipsec_sad_entry_add_del_ab64b5c6");
+ mp->_vl_msg_id = htons (msg_id);
+ mp->is_add = 1;
+ mp->entry.sad_id = htonl (sad_id);
+ mp->entry.spi = id->spi;
+ mp->entry.protocol = id->proto == IPPROTO_ESP ? htonl (IPSEC_API_PROTO_ESP) :
+ htonl (IPSEC_API_PROTO_AH);
+
+ switch (data->enc_alg)
+ {
+ case ENCR_NULL:
+ ca = IPSEC_API_CRYPTO_ALG_NONE;
+ break;
+ case ENCR_AES_CBC:
+ switch (key_len * 8)
+ {
+ case 128:
+ ca = IPSEC_API_CRYPTO_ALG_AES_CBC_128;
+ break;
+ case 192:
+ ca = IPSEC_API_CRYPTO_ALG_AES_CBC_192;
+ break;
+ case 256:
+ ca = IPSEC_API_CRYPTO_ALG_AES_CBC_256;
+ break;
+ default:
+ DBG1 (DBG_KNL, "Key length %d is not supported by VPP!",
+ key_len * 8);
+ goto error;
+ }
+ break;
+ case ENCR_AES_CTR:
+ switch (key_len * 8)
+ {
+ case 128:
+ ca = IPSEC_API_CRYPTO_ALG_AES_CTR_128;
+ break;
+ case 192:
+ ca = IPSEC_API_CRYPTO_ALG_AES_CTR_192;
+ break;
+ case 256:
+ ca = IPSEC_API_CRYPTO_ALG_AES_CTR_256;
+ break;
+ default:
+ DBG1 (DBG_KNL, "Key length %d is not supported by VPP!",
+ key_len * 8);
+ goto error;
+ }
+ break;
+ case ENCR_AES_GCM_ICV8:
+ case ENCR_AES_GCM_ICV12:
+ case ENCR_AES_GCM_ICV16:
+ switch (key_len * 8)
+ {
+ case 128:
+ ca = IPSEC_API_CRYPTO_ALG_AES_GCM_128;
+ break;
+ case 192:
+ ca = IPSEC_API_CRYPTO_ALG_AES_GCM_192;
+ break;
+ case 256:
+ ca = IPSEC_API_CRYPTO_ALG_AES_GCM_256;
+ break;
+ default:
+ DBG1 (DBG_KNL, "Key length %d is not supported by VPP!",
+ key_len * 8);
+ goto error;
+ }
+ break;
+ case ENCR_DES:
+ ca = IPSEC_API_CRYPTO_ALG_DES_CBC;
+ break;
+ case ENCR_3DES:
+ ca = IPSEC_API_CRYPTO_ALG_3DES_CBC;
+ break;
+ default:
+ DBG1 (DBG_KNL, "algorithm %N not supported by VPP!",
+ encryption_algorithm_names, data->enc_alg);
+ goto error;
+ }
+ mp->entry.crypto_algorithm = htonl (ca);
+ mp->entry.crypto_key.length = key_len < 128 ? key_len : 128;
+ memcpy (mp->entry.crypto_key.data, data->enc_key.ptr,
+ mp->entry.crypto_key.length);
+
+ /* copy salt for AEAD algorithms */
+ if ((data->enc_alg == ENCR_AES_CTR) ||
+ (data->enc_alg == ENCR_AES_GCM_ICV8) ||
+ (data->enc_alg == ENCR_AES_GCM_ICV12) ||
+ (data->enc_alg == ENCR_AES_GCM_ICV16))
+ {
+ memcpy (&mp->entry.salt, data->enc_key.ptr + mp->entry.crypto_key.length,
+ 4);
+ }
+
+ switch (data->int_alg)
+ {
+ case AUTH_UNDEFINED:
+ ia = IPSEC_API_INTEG_ALG_NONE;
+ break;
+ case AUTH_HMAC_MD5_96:
+ ia = IPSEC_API_INTEG_ALG_MD5_96;
+ break;
+ case AUTH_HMAC_SHA1_96:
+ ia = IPSEC_API_INTEG_ALG_SHA1_96;
+ break;
+ case AUTH_HMAC_SHA2_256_96:
+ ia = IPSEC_API_INTEG_ALG_SHA_256_96;
+ break;
+ case AUTH_HMAC_SHA2_256_128:
+ ia = IPSEC_API_INTEG_ALG_SHA_256_128;
+ break;
+ case AUTH_HMAC_SHA2_384_192:
+ ia = IPSEC_API_INTEG_ALG_SHA_384_192;
+ break;
+ case AUTH_HMAC_SHA2_512_256:
+ ia = IPSEC_API_INTEG_ALG_SHA_512_256;
+ break;
+ default:
+ DBG1 (DBG_KNL, "algorithm %N not supported by VPP!",
+ integrity_algorithm_names, data->int_alg);
+ goto error;
+ break;
+ }
+ mp->entry.integrity_algorithm = htonl (ia);
+ mp->entry.integrity_key.length =
+ data->int_key.len < 128 ? data->int_key.len : 128;
+ memcpy (mp->entry.integrity_key.data, data->int_key.ptr,
+ mp->entry.integrity_key.length);
+
+ int flags = IPSEC_API_SAD_FLAG_NONE;
+ if (data->esn)
+ flags |= IPSEC_API_SAD_FLAG_USE_ESN;
+ if (data->mode == MODE_TUNNEL)
+ {
+ if (id->src->get_family (id->src) == AF_INET6)
+ flags |= IPSEC_API_SAD_FLAG_IS_TUNNEL_V6;
+ else
+ flags |= IPSEC_API_SAD_FLAG_IS_TUNNEL;
+ }
+ if (data->encap)
+ {
+ DBG1 (DBG_KNL, "UDP encap!!!!!!!!!!!!!!!!!!!!");
+ flags |= IPSEC_API_SAD_FLAG_UDP_ENCAP;
+ }
+ mp->entry.flags = htonl (flags);
+
+ bool is_ipv6 = false;
+ if (id->src->get_family (id->src) == AF_INET6)
+ {
+ is_ipv6 = true;
+ mp->entry.tunnel_src.af = htonl (ADDRESS_IP6);
+ mp->entry.tunnel_dst.af = htonl (ADDRESS_IP6);
+ }
+ else
+ {
+ mp->entry.tunnel_src.af = htonl (ADDRESS_IP4);
+ mp->entry.tunnel_dst.af = htonl (ADDRESS_IP4);
+ }
+ src = id->src->get_address (id->src);
+ memcpy (is_ipv6 ? mp->entry.tunnel_src.un.ip6 : mp->entry.tunnel_src.un.ip4,
+ src.ptr, src.len);
+ dst = id->dst->get_address (id->dst);
+ memcpy (is_ipv6 ? mp->entry.tunnel_dst.un.ip6 : mp->entry.tunnel_dst.un.ip4,
+ dst.ptr, dst.len);
+ if (vac->send (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG1 (DBG_KNL, "vac adding SA failed");
+ goto error;
+ }
+ rmp = (void *) out;
+ if (rmp->retval)
+ {
+ DBG1 (DBG_KNL, "add SA failed rv:%d", ntohl (rmp->retval));
+ goto error;
+ }
+
+ this->mutex->lock (this->mutex);
+ INIT (sa_id, .src = id->src->clone (id->src),
+ .dst = id->dst->clone (id->dst), .spi = id->spi, .proto = id->proto, );
+ INIT (sa, .sa_id = sad_id, .stat_index = ntohl (rmp->stat_index), );
+ DBG4 (DBG_KNL, "put sa by its sa_id %x !!!!!!", sad_id);
+ this->sas->put (this->sas, sa_id, sa);
+ schedule_expiration (this, data, id);
+ this->mutex->unlock (this->mutex);
+ rv = SUCCESS;
+
+error:
+ free (out);
+ vl_msg_api_free (mp);
+ return rv;
+}
+
+METHOD (kernel_ipsec_t, update_sa, status_t, private_kernel_vpp_ipsec_t *this,
+ kernel_ipsec_sa_id_t *id, kernel_ipsec_update_sa_t *data)
+{
+ DBG1 (DBG_KNL,
+ "update sa not supported!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+ return NOT_SUPPORTED;
+}
+
+METHOD (kernel_ipsec_t, query_sa, status_t, private_kernel_vpp_ipsec_t *this,
+ kernel_ipsec_sa_id_t *id, kernel_ipsec_query_sa_t *data,
+ uint64_t *bytes, uint64_t *packets, time_t *time)
+{
+ status_t rv = FAILED;
+ sa_t *sa;
+ u32 *dir;
+ int i, k;
+ stat_segment_data_t *res;
+ u8 **pattern = 0;
+ uint64_t res_bytes = 0;
+ uint64_t res_packets = 0;
+
+ this->mutex->lock (this->mutex);
+ sa = this->sas->get (this->sas, id);
+ this->mutex->unlock (this->mutex);
+ if (!sa)
+ {
+ DBG1 (DBG_KNL, "SA not found");
+ return NOT_FOUND;
+ }
+
+ int rv_stat = stat_segment_connect ("/run/vpp/stats.sock");
+ if (rv_stat != 0)
+ {
+ DBG1 (DBG_KNL, "Not connecting with stats segmentation");
+ return NOT_FOUND;
+ }
+ vec_add1 (pattern, (u8 *) "/net/ipsec/sa");
+ dir = stat_segment_ls ((u8 **) pattern);
+ res = stat_segment_dump (dir);
+ /* i-loop for each results find by pattern - here two:
+ * 1. /net/ipsec/sa
+ * 2. /net/ipsec/sa/lost
+ */
+ for (i = 0; i < vec_len (res); i++)
+ {
+ switch (res[i].type)
+ {
+ /* type for how many packets are lost */
+ case STAT_DIR_TYPE_COUNTER_VECTOR_SIMPLE:
+ if (res[i].simple_counter_vec == 0)
+ continue;
+ break;
+ /* type for counter for each SA */
+ case STAT_DIR_TYPE_COUNTER_VECTOR_COMBINED:
+ if (res[i].combined_counter_vec == 0)
+ continue;
+ /* k-loop for each threads - that you run VPP */
+ for (k = 0; k < vec_len (res[i].combined_counter_vec); k++)
+ {
+ if (sa->stat_index <= vec_len (res[i].combined_counter_vec[k]))
+ {
+ DBG4 (DBG_KNL, "Thread: %d, Packets: %lu, Bytes: %lu", k,
+ res[i].combined_counter_vec[k][sa->stat_index].packets,
+ res[i].combined_counter_vec[k][sa->stat_index].bytes);
+ res_bytes +=
+ res[i].combined_counter_vec[k][sa->stat_index].bytes;
+ res_packets +=
+ res[i].combined_counter_vec[k][sa->stat_index].packets;
+ }
+ }
+ break;
+ case STAT_DIR_TYPE_NAME_VECTOR:
+ if (res[i].name_vector == 0)
+ continue;
+ break;
+ }
+ }
+ stat_segment_data_free (res);
+ stat_segment_disconnect ();
+
+ vec_free (pattern);
+ vec_free (dir);
+
+ if (bytes)
+ {
+ *bytes = res_bytes;
+ }
+ if (packets)
+ {
+ *packets = res_packets;
+ }
+ if (time)
+ {
+ *time = 0;
+ }
+
+ rv = SUCCESS;
+ return rv;
+}
+
+METHOD (kernel_ipsec_t, del_sa, status_t, private_kernel_vpp_ipsec_t *this,
+ kernel_ipsec_sa_id_t *id, kernel_ipsec_del_sa_t *data)
+{
+ char *out = NULL;
+ int out_len;
+ vl_api_ipsec_sad_entry_add_del_t *mp;
+ vl_api_ipsec_sad_entry_add_del_reply_t *rmp;
+ status_t rv = FAILED;
+ sa_t *sa;
+
+ this->mutex->lock (this->mutex);
+ sa = this->sas->get (this->sas, id);
+ if (!sa)
+ {
+ DBG1 (DBG_KNL, "SA not found");
+ rv = NOT_FOUND;
+ goto error;
+ }
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+ mp->is_add = 0;
+ u16 msg_id =
+ vl_msg_api_get_msg_index ((u8 *) "ipsec_sad_entry_add_del_ab64b5c6");
+ mp->_vl_msg_id = htons (msg_id);
+ mp->entry.sad_id = htonl (sa->sa_id);
+
+ if (vac->send (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG1 (DBG_KNL, "vac removing SA failed");
+ goto error;
+ }
+ rmp = (void *) out;
+ if (rmp->retval)
+ {
+ DBG1 (DBG_KNL, "del SA failed rv:%d", ntohl (rmp->retval));
+ goto error;
+ }
+
+ vl_msg_api_free (mp);
+ this->sas->remove (this->sas, id);
+ rv = SUCCESS;
+error:
+ free (out);
+ this->mutex->unlock (this->mutex);
+ return rv;
+}
+
+METHOD (kernel_ipsec_t, flush_sas, status_t, private_kernel_vpp_ipsec_t *this)
+{
+ enumerator_t *enumerator;
+ int out_len;
+ char *out;
+ vl_api_ipsec_sad_entry_add_del_t *mp;
+ sa_t *sa = NULL;
+
+ this->mutex->lock (this->mutex);
+ enumerator = this->sas->create_enumerator (this->sas);
+ while (enumerator->enumerate (enumerator, sa, NULL))
+ {
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+ u16 msg_id =
+ vl_msg_api_get_msg_index ((u8 *) "ipsec_sad_entry_add_del_ab64b5c6");
+ mp->_vl_msg_id = htons (msg_id);
+ mp->entry.sad_id = htonl (sa->sa_id);
+ mp->is_add = 0;
+ if (vac->send (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG1 (DBG_KNL, "flush_sas failed!!!!");
+ return FALSE;
+ }
+ free (out);
+ vl_msg_api_free (mp);
+ this->sas->remove_at (this->sas, enumerator);
+ }
+ enumerator->destroy (enumerator);
+ this->mutex->unlock (this->mutex);
+
+ return SUCCESS;
+}
+
+METHOD (kernel_ipsec_t, add_policy, status_t, private_kernel_vpp_ipsec_t *this,
+ kernel_ipsec_policy_id_t *id, kernel_ipsec_manage_policy_t *data)
+{
+ return manage_policy (this, TRUE, id, data);
+}
+
+METHOD (kernel_ipsec_t, query_policy, status_t,
+ private_kernel_vpp_ipsec_t *this, kernel_ipsec_policy_id_t *id,
+ kernel_ipsec_query_policy_t *data, time_t *use_time)
+{
+ return NOT_SUPPORTED;
+}
+
+METHOD (kernel_ipsec_t, del_policy, status_t, private_kernel_vpp_ipsec_t *this,
+ kernel_ipsec_policy_id_t *id, kernel_ipsec_manage_policy_t *data)
+{
+ return manage_policy (this, FALSE, id, data);
+}
+
+METHOD (kernel_ipsec_t, flush_policies, status_t,
+ private_kernel_vpp_ipsec_t *this)
+{
+ return NOT_SUPPORTED;
+}
+
+METHOD (kernel_ipsec_t, bypass_socket, bool, private_kernel_vpp_ipsec_t *this,
+ int fd, int family)
+{
+ return FALSE;
+}
+
+METHOD (kernel_ipsec_t, enable_udp_decap, bool,
+ private_kernel_vpp_ipsec_t *this, int fd, int family, u_int16_t port)
+{
+ DBG1 (DBG_KNL, "enable_udp_decap not supported!!!!!!!!!!!!!!!!!!!!!!!!!");
+ return FALSE;
+}
+
+METHOD (kernel_ipsec_t, destroy, void, private_kernel_vpp_ipsec_t *this)
+{
+ this->mutex->destroy (this->mutex);
+ this->sas->destroy (this->sas);
+ this->spds->destroy (this->spds);
+ this->routes->destroy (this->routes);
+ free (this);
+}
+
+kernel_vpp_ipsec_t *
+kernel_vpp_ipsec_create ()
+{
+ private_kernel_vpp_ipsec_t *this;
+
+ INIT(this,
+ .public = {
+ .interface = {
+ .get_features = _get_features,
+ .get_spi = _get_spi,
+ .get_cpi = _get_cpi,
+ .add_sa = _add_sa,
+ .update_sa = _update_sa,
+ .query_sa = _query_sa,
+ .del_sa = _del_sa,
+ .flush_sas = _flush_sas,
+ .add_policy = _add_policy,
+ .query_policy = _query_policy,
+ .del_policy = _del_policy,
+ .flush_policies = _flush_policies,
+ .bypass_socket = _bypass_socket,
+ .enable_udp_decap = _enable_udp_decap,
+ .destroy = _destroy,
+ },
+ },
+ .next_sad_id = 0,
+ .next_spd_id = 0,
+ .mutex = mutex_create(MUTEX_TYPE_DEFAULT),
+ .sas = hashtable_create((hashtable_hash_t)sa_hash,
+ (hashtable_equals_t)sa_equals, 32),
+ .spds = hashtable_create((hashtable_hash_t)interface_hash,
+ (hashtable_equals_t)interface_equals, 4),
+ .routes = linked_list_create(),
+ .install_routes = lib->settings->get_bool(lib->settings,
+ "%s.install_routes", TRUE, lib->ns),
+ );
+
+ if (!init_spi (this))
+ {
+ destroy (this);
+ return NULL;
+ }
+
+ return &this->public;
+}
diff --git a/extras/strongswan/vpp_sswan/kernel_vpp_ipsec.h b/extras/strongswan/vpp_sswan/kernel_vpp_ipsec.h
new file mode 100644
index 0000000..6466988
--- /dev/null
+++ b/extras/strongswan/vpp_sswan/kernel_vpp_ipsec.h
@@ -0,0 +1,41 @@
+#ifndef KERNEL_VPP_IPSEC_H_
+#define KERNEL_VPP_IPSEC_H_
+/*
+ * Copyright (c) 2022 Intel and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <kernel/kernel_ipsec.h>
+
+typedef struct kernel_vpp_ipsec_t kernel_vpp_ipsec_t;
+
+/**
+ * Implementation of the kernel ipsec interface using Netlink.
+ */
+struct kernel_vpp_ipsec_t
+{
+
+ /**
+ * Implements kernel_ipsec_t interface
+ */
+ kernel_ipsec_t interface;
+};
+
+/**
+ * Create a vpp kernel ipsec interface instance.
+ *
+ * @return kernel_vpp_ipsec_t instance
+ */
+kernel_vpp_ipsec_t *kernel_vpp_ipsec_create ();
+
+#endif /** KERNEL_VPP_IPSEC_H_ @}*/
diff --git a/extras/strongswan/vpp_sswan/kernel_vpp_net.c b/extras/strongswan/vpp_sswan/kernel_vpp_net.c
new file mode 100644
index 0000000..02f002a
--- /dev/null
+++ b/extras/strongswan/vpp_sswan/kernel_vpp_net.c
@@ -0,0 +1,752 @@
+/*
+ * Copyright (c) 2022 Intel and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <utils/debug.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <threading/thread.h>
+#include <threading/mutex.h>
+
+#define vl_typedefs
+#define vl_endianfun
+/* Include the (first) vlib-api API definition layer */
+#include <vlibmemory/vl_memory_api_h.h>
+/* Include the current layer (third) vpp API definition layer */
+#include <vpp/api/vpe_types.api.h>
+#include <vpp/api/vpe.api.h>
+
+#include <vnet/ip-neighbor/ip_neighbor.api_enum.h>
+#include <vnet/ip-neighbor/ip_neighbor.api_types.h>
+#include <vnet/ip/ip.api_enum.h>
+#include <vnet/ip/ip.api_types.h>
+#include <vnet/interface.api_enum.h>
+#include <vnet/interface.api_types.h>
+#undef vl_typedefs
+#undef vl_endianfun
+
+#include "kernel_vpp_net.h"
+#include "kernel_vpp_shared.h"
+
+typedef struct private_kernel_vpp_net_t private_kernel_vpp_net_t;
+
+/**
+ * Private data of kernel_vpp_net implementation.
+ */
+struct private_kernel_vpp_net_t
+{
+
+ /**
+ * Public interface.
+ */
+ kernel_vpp_net_t public;
+
+ /**
+ * Mutex to access interface list
+ */
+ mutex_t *mutex;
+
+ /**
+ * Known interfaces, as iface_t
+ */
+ linked_list_t *ifaces;
+
+ /**
+ * Inteface update thread
+ */
+ thread_t *net_update;
+
+ /**
+ * TRUE if interface events enabled
+ */
+ bool events_on;
+};
+
+/**
+ * Interface entry
+ */
+typedef struct
+{
+ /** interface index */
+ uint32_t index;
+ /** interface name */
+ char if_name[64];
+ /** list of known addresses, as host_t */
+ linked_list_t *addrs;
+ /** TRUE if up */
+ bool up;
+} iface_t;
+
+/**
+ * Address enumerator
+ */
+typedef struct
+{
+ /** implements enumerator_t */
+ enumerator_t public;
+ /** what kind of address should we enumerate? */
+ kernel_address_type_t which;
+ /** enumerator over interfaces */
+ enumerator_t *ifaces;
+ /** current enumerator over addresses, or NULL */
+ enumerator_t *addrs;
+ /** mutex to unlock on destruction */
+ mutex_t *mutex;
+} addr_enumerator_t;
+
+/**
+ * FIB path entry
+ */
+typedef struct
+{
+ chunk_t next_hop;
+ uint32_t sw_if_index;
+ uint8_t preference;
+} fib_path_t;
+
+/**
+ * Get an iface entry for a local address
+ */
+static iface_t *
+address2entry (private_kernel_vpp_net_t *this, host_t *ip)
+{
+ enumerator_t *ifaces, *addrs;
+ iface_t *entry, *found = NULL;
+ host_t *host;
+
+ ifaces = this->ifaces->create_enumerator (this->ifaces);
+ while (!found && ifaces->enumerate (ifaces, &entry))
+ {
+ addrs = entry->addrs->create_enumerator (entry->addrs);
+ while (!found && addrs->enumerate (addrs, &host))
+ {
+ if (host->ip_equals (host, ip))
+ {
+ found = entry;
+ }
+ }
+ addrs->destroy (addrs);
+ }
+ ifaces->destroy (ifaces);
+
+ return found;
+}
+
+/**
+ * Add or remove a route
+ */
+static status_t
+manage_route (private_kernel_vpp_net_t *this, bool add, chunk_t dst,
+ uint8_t prefixlen, host_t *gtw, char *name)
+{
+ char *out;
+ int out_len;
+ enumerator_t *enumerator;
+ iface_t *entry;
+ vl_api_ip_route_add_del_t *mp;
+ vl_api_ip_route_add_del_reply_t *rmp;
+ vl_api_fib_path_t *apath;
+ bool exists = FALSE;
+
+ this->mutex->lock (this->mutex);
+ enumerator = this->ifaces->create_enumerator (this->ifaces);
+ while (enumerator->enumerate (enumerator, &entry))
+ {
+ if (streq (name, entry->if_name))
+ {
+ exists = TRUE;
+ break;
+ }
+ }
+ enumerator->destroy (enumerator);
+ this->mutex->unlock (this->mutex);
+
+ if (!exists)
+ {
+ DBG1 (DBG_NET, "if_name %s not found", name);
+ return NOT_FOUND;
+ }
+
+ mp = vl_msg_api_alloc (sizeof (*mp) + sizeof (*apath));
+ memset (mp, 0, sizeof (*mp) + sizeof (*apath));
+ u16 msg_id = vl_msg_api_get_msg_index ((u8 *) "ip_route_add_del_b8ecfe0d");
+ mp->_vl_msg_id = ntohs (msg_id);
+ mp->is_add = add;
+ mp->route.prefix.len = prefixlen;
+ mp->route.n_paths = 1;
+ apath = &mp->route.paths[0];
+ apath->sw_if_index = ntohl (entry->index);
+ apath->rpf_id = ~0;
+ apath->weight = 1;
+ switch (dst.len)
+ {
+ case 4:
+ mp->route.prefix.address.af = ntohl (ADDRESS_IP4);
+ memcpy (&mp->route.prefix.address.un.ip4, dst.ptr, dst.len);
+ if (gtw)
+ {
+ chunk_t addr = gtw->get_address (gtw);
+ apath->proto = ntohl (FIB_API_PATH_NH_PROTO_IP4);
+ memcpy (&apath->nh.address.ip4, addr.ptr, dst.len);
+ }
+ break;
+ case 16:
+ mp->route.prefix.address.af = ntohl (ADDRESS_IP6);
+ memcpy (&mp->route.prefix.address.un.ip6, dst.ptr, dst.len);
+ if (gtw)
+ {
+ chunk_t addr = gtw->get_address (gtw);
+ apath->proto = ntohl (FIB_API_PATH_NH_PROTO_IP6);
+ memcpy (&apath->nh.address.ip6, addr.ptr, dst.len);
+ }
+ break;
+ default:
+ vl_msg_api_free (mp);
+ return FAILED;
+ }
+
+ if (vac->send (vac, (char *) mp, sizeof (*mp) + sizeof (*apath), &out,
+ &out_len))
+ {
+ DBG1 (DBG_KNL, "vac %sing route failed", add ? "add" : "remov");
+ vl_msg_api_free (mp);
+ return FAILED;
+ }
+ rmp = (void *) out;
+ vl_msg_api_free (mp);
+ if (rmp->retval)
+ {
+ DBG1 (DBG_KNL, "%s route failed %d", add ? "add" : "delete",
+ ntohl (rmp->retval));
+ free (out);
+ return FAILED;
+ }
+ free (out);
+ return SUCCESS;
+}
+
+/**
+ * Check if an address or net (addr with prefix net bits) is in
+ * subnet (net with net_len net bits)
+ */
+static bool
+addr_in_subnet (chunk_t addr, int prefix, chunk_t net, int net_len)
+{
+ static const u_char mask[] = {
+ 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe
+ };
+ int byte = 0;
+
+ if (net_len == 0)
+ { /* any address matches a /0 network */
+ return TRUE;
+ }
+ if (addr.len != net.len || net_len > 8 * net.len || prefix < net_len)
+ {
+ return FALSE;
+ }
+ /* scan through all bytes in network order */
+ while (net_len > 0)
+ {
+ if (net_len < 8)
+ {
+ return (mask[net_len] & addr.ptr[byte]) ==
+ (mask[net_len] & net.ptr[byte]);
+ }
+ else
+ {
+ if (addr.ptr[byte] != net.ptr[byte])
+ {
+ return FALSE;
+ }
+ byte++;
+ net_len -= 8;
+ }
+ }
+ return TRUE;
+}
+
+/**
+ * Get a route: If "nexthop" the nexthop is returned, source addr otherwise
+ */
+static host_t *
+get_route (private_kernel_vpp_net_t *this, host_t *dest, int prefix,
+ bool nexthop, char **iface, host_t *src)
+{
+ fib_path_t path;
+ char *out, *tmp;
+ int out_len, i, num;
+ vl_api_fib_path_t *fp;
+ host_t *addr = NULL;
+ enumerator_t *enumerator;
+ iface_t *entry;
+ int family;
+
+ path.sw_if_index = ~0;
+ path.preference = ~0;
+ path.next_hop = chunk_empty;
+
+ vl_api_ip_route_dump_t *mp;
+ vl_api_ip_route_details_t *rmp;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ clib_memset (mp, 0, sizeof (*mp));
+ u16 msg_id = vl_msg_api_get_msg_index ((u8 *) "ip_route_dump_b9d2e09e");
+ mp->_vl_msg_id = htons (msg_id);
+ mp->table.is_ip6 = dest->get_family (dest) == AF_INET6 ? 1 : 0;
+ if (vac->send_dump (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ vl_msg_api_free (mp);
+ DBG2 (DBG_KNL, "send VL_API_IP_ROUTE_ADD_DEL failed");
+ return NULL;
+ }
+ vl_msg_api_free (mp);
+
+ if (dest->get_family (dest) == AF_INET)
+ {
+ i = 0;
+ family = AF_INET;
+ if (prefix == -1)
+ prefix = 32;
+
+ tmp = out;
+ while (tmp < (out + out_len))
+ {
+ rmp = (void *) tmp;
+ num = rmp->route.n_paths;
+
+ if (rmp->route.prefix.len &&
+ addr_in_subnet (
+ dest->get_address (dest), prefix,
+ chunk_create (rmp->route.prefix.address.un.ip4, 4),
+ rmp->route.prefix.len))
+ {
+ fp = rmp->route.paths;
+ for (i = 0; i < num; i++)
+ {
+#define IS_IP4_ANY(a) (a[0] == 0 && a[1] == 0 && a[2] == 0 & a[3] == 0)
+ if (fp->type == FIB_API_PATH_TYPE_DROP)
+ {
+ fp++;
+ continue;
+ }
+ if ((fp->preference < path.preference) ||
+ (path.sw_if_index == ~0) ||
+ IS_IP4_ANY (path.next_hop.ptr))
+ {
+ path.sw_if_index = ntohl (fp->sw_if_index);
+ path.preference = fp->preference;
+ if (path.next_hop.ptr)
+ vl_msg_api_free (path.next_hop.ptr);
+ path.next_hop = chunk_create (fp->nh.address.ip4, 4);
+ }
+ fp++;
+ }
+ }
+ tmp += sizeof (*rmp) + (sizeof (*fp) * num);
+ }
+ }
+ else
+ {
+ DBG1 (DBG_KNL, "not yet support ip6");
+ return NULL;
+ }
+
+ if (path.next_hop.len)
+ {
+ if (nexthop)
+ {
+ if (iface)
+ {
+ *iface = NULL;
+ this->mutex->lock (this->mutex);
+ enumerator = this->ifaces->create_enumerator (this->ifaces);
+ while (enumerator->enumerate (enumerator, &entry))
+ {
+ if (entry->index == path.sw_if_index)
+ {
+ *iface = strdup (entry->if_name);
+ break;
+ }
+ }
+ enumerator->destroy (enumerator);
+ this->mutex->unlock (this->mutex);
+ }
+ addr = host_create_from_chunk (family, path.next_hop, 0);
+ }
+ else
+ {
+ if (src)
+ {
+ addr = src->clone (src);
+ }
+ }
+ }
+
+ free (out);
+
+ return addr;
+}
+
+METHOD (enumerator_t, addr_enumerate, bool, addr_enumerator_t *this,
+ va_list args)
+{
+ iface_t *entry;
+ host_t **host;
+
+ VA_ARGS_VGET (args, host);
+
+ while (TRUE)
+ {
+ while (!this->addrs)
+ {
+ if (!this->ifaces->enumerate (this->ifaces, &entry))
+ {
+ return FALSE;
+ }
+ if (!entry->up && !(this->which & ADDR_TYPE_DOWN))
+ {
+ continue;
+ }
+ this->addrs = entry->addrs->create_enumerator (entry->addrs);
+ }
+ if (this->addrs->enumerate (this->addrs, host))
+ {
+ return TRUE;
+ }
+ this->addrs->destroy (this->addrs);
+ this->addrs = NULL;
+ }
+}
+
+METHOD (enumerator_t, addr_destroy, void, addr_enumerator_t *this)
+{
+ DESTROY_IF (this->addrs);
+ this->ifaces->destroy (this->ifaces);
+ this->mutex->unlock (this->mutex);
+ free (this);
+}
+
+METHOD (kernel_net_t, get_interface_name, bool, private_kernel_vpp_net_t *this,
+ host_t *ip, char **name)
+{
+ iface_t *entry;
+
+ this->mutex->lock (this->mutex);
+ entry = address2entry (this, ip);
+ if (entry && name)
+ {
+ *name = strdup (entry->if_name);
+ }
+ this->mutex->unlock (this->mutex);
+
+ return entry != NULL;
+}
+
+METHOD (kernel_net_t, create_address_enumerator, enumerator_t *,
+ private_kernel_vpp_net_t *this, kernel_address_type_t which)
+{
+ addr_enumerator_t *enumerator;
+
+ if (!(which & ADDR_TYPE_REGULAR))
+ {
+ /* we currently have no virtual, but regular IPs only */
+ return enumerator_create_empty ();
+ }
+
+ this->mutex->lock (this->mutex);
+
+ INIT(enumerator,
+ .public = {
+ .enumerate = enumerator_enumerate_default,
+ .venumerate = _addr_enumerate,
+ .destroy = _addr_destroy,
+ },
+ .which = which,
+ .ifaces = this->ifaces->create_enumerator(this->ifaces),
+ .mutex = this->mutex,
+ );
+ return &enumerator->public;
+}
+
+METHOD (kernel_net_t, get_source_addr, host_t *,
+ private_kernel_vpp_net_t *this, host_t *dest, host_t *src)
+{
+ return get_route (this, dest, -1, FALSE, NULL, src);
+}
+
+METHOD (kernel_net_t, get_nexthop, host_t *, private_kernel_vpp_net_t *this,
+ host_t *dest, int prefix, host_t *src, char **iface)
+{
+ return get_route (this, dest, prefix, TRUE, iface, src);
+}
+
+METHOD (kernel_net_t, add_ip, status_t, private_kernel_vpp_net_t *this,
+ host_t *virtual_ip, int prefix, char *iface_name)
+{
+ return NOT_SUPPORTED;
+}
+
+METHOD (kernel_net_t, del_ip, status_t, private_kernel_vpp_net_t *this,
+ host_t *virtual_ip, int prefix, bool wait)
+{
+ return NOT_SUPPORTED;
+}
+
+METHOD (kernel_net_t, add_route, status_t, private_kernel_vpp_net_t *this,
+ chunk_t dst_net, u_int8_t prefixlen, host_t *gateway, host_t *src_ip,
+ char *if_name)
+{
+ return manage_route (this, TRUE, dst_net, prefixlen, gateway, if_name);
+}
+
+METHOD (kernel_net_t, del_route, status_t, private_kernel_vpp_net_t *this,
+ chunk_t dst_net, u_int8_t prefixlen, host_t *gateway, host_t *src_ip,
+ char *if_name)
+{
+ return manage_route (this, FALSE, dst_net, prefixlen, gateway, if_name);
+}
+
+static void
+iface_destroy (iface_t *this)
+{
+ this->addrs->destroy_offset (this->addrs, offsetof (host_t, destroy));
+ free (this);
+}
+
+METHOD (kernel_net_t, destroy, void, private_kernel_vpp_net_t *this)
+{
+ this->net_update->cancel (this->net_update);
+ this->mutex->destroy (this->mutex);
+ this->ifaces->destroy_function (this->ifaces, (void *) iface_destroy);
+ free (this);
+}
+
+/**
+ * Update addresses for an iface entry
+ */
+static void
+update_addrs (private_kernel_vpp_net_t *this, iface_t *entry)
+{
+ char *out;
+ int out_len, i, num;
+ vl_api_ip_address_dump_t *mp;
+ vl_api_ip_address_details_t *rmp, *tmp;
+ linked_list_t *addrs;
+ host_t *host;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ clib_memset (mp, 0, sizeof (*mp));
+ u16 msg_id = vl_msg_api_get_msg_index ((u8 *) "ip_address_dump_2d033de4");
+ mp->_vl_msg_id = htons (msg_id);
+ mp->sw_if_index = htonl (entry->index);
+ mp->is_ipv6 = 0;
+ if (vac->send_dump (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG2 (DBG_NET, "update_addrs : send VL_API_IP_ADDRESS_DUMP ipv4 failed");
+ vl_msg_api_free (mp);
+ return;
+ }
+ num = out_len / sizeof (*rmp);
+ addrs = linked_list_create ();
+ tmp = (vl_api_ip_address_details_t *) out;
+ for (i = 0; i < num; i++)
+ {
+ tmp += i;
+ rmp = tmp;
+ host = host_create_from_chunk (
+ AF_INET, chunk_create (rmp->prefix.address.un.ip4, 4), 0);
+ addrs->insert_last (addrs, host);
+ }
+ free (out);
+
+ mp->is_ipv6 = 1;
+ if (vac->send_dump (vac, (char *) mp, sizeof (*mp), &out, &out_len))
+ {
+ DBG2 (DBG_NET, "update_addrs : send VL_API_IP_ADDRESS_DUMP ipv6 failed");
+ vl_msg_api_free (mp);
+ return;
+ }
+ num = out_len / sizeof (*rmp);
+ tmp = (vl_api_ip_address_details_t *) out;
+ for (i = 0; i < num; i++)
+ {
+ tmp += i;
+ rmp = tmp;
+ host = host_create_from_chunk (
+ AF_INET6, chunk_create (rmp->prefix.address.un.ip6, 16), 0);
+ addrs->insert_last (addrs, host);
+ }
+ vl_msg_api_free (mp);
+ free (out);
+
+ entry->addrs->destroy (entry->addrs);
+ entry->addrs =
+ linked_list_create_from_enumerator (addrs->create_enumerator (addrs));
+ addrs->destroy (addrs);
+}
+
+/**
+ * VPP API interface event callback
+ */
+static void
+event_cb (char *data, int data_len, void *ctx)
+{
+ private_kernel_vpp_net_t *this = ctx;
+ vl_api_sw_interface_event_t *event;
+ iface_t *entry;
+ enumerator_t *enumerator;
+
+ event = (void *) data;
+ this->mutex->lock (this->mutex);
+ enumerator = this->ifaces->create_enumerator (this->ifaces);
+ while (enumerator->enumerate (enumerator, &entry))
+ {
+ if (entry->index == ntohl (event->sw_if_index))
+ {
+ if (event->deleted)
+ {
+ this->ifaces->remove_at (this->ifaces, enumerator);
+ DBG2 (DBG_NET, "interface deleted %u %s", entry->index,
+ entry->if_name);
+ iface_destroy (entry);
+ }
+ else if (entry->up != (event->flags & IF_STATUS_API_FLAG_LINK_UP))
+ {
+ entry->up =
+ (event->flags & IF_STATUS_API_FLAG_LINK_UP) ? TRUE : FALSE;
+ DBG2 (DBG_NET, "interface state changed %u %s %s", entry->index,
+ entry->if_name, entry->up ? "UP" : "DOWN");
+ }
+ break;
+ }
+ }
+ enumerator->destroy (enumerator);
+ this->mutex->unlock (this->mutex);
+ free (data);
+}
+
+/**
+ * Inteface update thread (update interface list and interface address)
+ */
+static void *
+net_update_thread_fn (private_kernel_vpp_net_t *this)
+{
+ status_t rv;
+ while (1)
+ {
+ char *out;
+ int out_len;
+ vl_api_sw_interface_dump_t *mp;
+ vl_api_sw_interface_details_t *rmp;
+ enumerator_t *enumerator;
+ iface_t *entry;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+ u16 msg_id =
+ vl_msg_api_get_msg_index ((u8 *) "sw_interface_dump_aa610c27");
+ mp->_vl_msg_id = htons (msg_id);
+ mp->name_filter_valid = 0;
+ rv = vac->send_dump (vac, (u8 *) mp, sizeof (*mp), &out, &out_len);
+ if (!rv)
+ {
+ int i, num;
+ this->mutex->lock (this->mutex);
+ enumerator = this->ifaces->create_enumerator (this->ifaces);
+ num = out_len / sizeof (*rmp);
+ rmp = (vl_api_sw_interface_details_t *) out;
+ for (i = 0; i < num; i++)
+ {
+ bool exists = FALSE;
+ if (i)
+ rmp += 1;
+ while (enumerator->enumerate (enumerator, &entry))
+ {
+ if (entry->index == ntohl (rmp->sw_if_index))
+ {
+ exists = TRUE;
+ break;
+ }
+ }
+ if (!exists)
+ {
+ INIT (entry, .index = ntohl (rmp->sw_if_index),
+ .up = (rmp->flags & IF_STATUS_API_FLAG_LINK_UP) ?
+ TRUE :
+ FALSE,
+ .addrs = linked_list_create (), );
+ memcpy (entry->if_name, rmp->interface_name, 63);
+ this->ifaces->insert_last (this->ifaces, entry);
+ }
+ update_addrs (this, entry);
+ }
+ enumerator->destroy (enumerator);
+ this->mutex->unlock (this->mutex);
+ free (out);
+ }
+ vl_msg_api_free (mp);
+
+ if (!this->events_on)
+ {
+ vl_api_want_interface_events_t *emp;
+ api_main_t *am = vlibapi_get_main ();
+
+ emp = vl_msg_api_alloc (sizeof (*emp));
+ clib_memset (emp, 0, sizeof (*emp));
+ u16 msg_id =
+ vl_msg_api_get_msg_index ((u8 *) "want_interface_events_476f5a08");
+ emp->_vl_msg_id = ntohs (msg_id);
+ emp->enable_disable = 1;
+ emp->pid = ntohl (am->our_pid);
+ rv = vac->register_event (vac, (char *) emp, sizeof (*emp), event_cb,
+ VL_API_SW_INTERFACE_EVENT, this);
+ if (!rv)
+ this->events_on = TRUE;
+ }
+
+ sleep (2);
+ }
+ return NULL;
+}
+
+kernel_vpp_net_t *
+kernel_vpp_net_create ()
+{
+ private_kernel_vpp_net_t *this;
+
+ INIT(this,
+ .public = {
+ .interface = {
+ .get_interface = _get_interface_name,
+ .create_address_enumerator = _create_address_enumerator,
+ .get_source_addr = _get_source_addr,
+ .get_nexthop = _get_nexthop,
+ .add_ip = _add_ip,
+ .del_ip = _del_ip,
+ .add_route = _add_route,
+ .del_route = _del_route,
+ .destroy = _destroy,
+ },
+ },
+ .mutex = mutex_create(MUTEX_TYPE_DEFAULT),
+ .ifaces = linked_list_create(),
+ .events_on = FALSE,
+ );
+
+ this->net_update =
+ thread_create ((thread_main_t) net_update_thread_fn, this);
+
+ return &this->public;
+}
diff --git a/extras/strongswan/vpp_sswan/kernel_vpp_net.h b/extras/strongswan/vpp_sswan/kernel_vpp_net.h
new file mode 100644
index 0000000..bf5359c
--- /dev/null
+++ b/extras/strongswan/vpp_sswan/kernel_vpp_net.h
@@ -0,0 +1,41 @@
+#ifndef KERNEL_VPP_NET_H_
+#define KERNEL_VPP_NET_H_
+/*
+ * Copyright (c) 2022 Intel and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <kernel/kernel_net.h>
+
+typedef struct kernel_vpp_net_t kernel_vpp_net_t;
+
+/**
+ * Implementation of the kernel network interface using Netlink.
+ */
+struct kernel_vpp_net_t
+{
+
+ /**
+ * Implements kernel_net_t interface
+ */
+ kernel_net_t interface;
+};
+
+/**
+ * Create a vpp kernel network interface instance.
+ *
+ * @return kernel_vpp_net_t instance
+ */
+kernel_vpp_net_t *kernel_vpp_net_create ();
+
+#endif /** KERNEL_VPP_NET_H_ @}*/
diff --git a/extras/strongswan/vpp_sswan/kernel_vpp_plugin.c b/extras/strongswan/vpp_sswan/kernel_vpp_plugin.c
new file mode 100644
index 0000000..9791987
--- /dev/null
+++ b/extras/strongswan/vpp_sswan/kernel_vpp_plugin.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2022 Intel and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <utils/debug.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+
+#define vl_typedefs
+#define vl_endianfun
+/* Include the (first) vlib-api API definition layer */
+#include <vlibmemory/vl_memory_api_h.h>
+/* Include the current layer (third) vpp API definition layer */
+#include <vpp/api/vpe_types.api.h>
+#include <vpp/api/vpe.api.h>
+#undef vl_typedefs
+#undef vl_endianfun
+
+#include "kernel_vpp_plugin.h"
+#include "kernel_vpp_shared.h"
+#include "kernel_vpp_ipsec.h"
+#include "kernel_vpp_net.h"
+
+typedef struct private_kernel_vpp_plugin_t private_kernel_vpp_plugin_t;
+
+/**
+ * private data of kernel vpp plugin
+ */
+struct private_kernel_vpp_plugin_t
+{
+ /**
+ * implements plugin interface
+ */
+ kernel_vpp_plugin_t public;
+
+ vac_t *vac;
+};
+
+METHOD (plugin_t, get_name, char *, private_kernel_vpp_plugin_t *this)
+{
+ return "kernel-vpp";
+}
+
+METHOD (plugin_t, get_features, int, private_kernel_vpp_plugin_t *this,
+ plugin_feature_t *features[])
+{
+ static plugin_feature_t f[] = {
+ PLUGIN_CALLBACK (kernel_ipsec_register, kernel_vpp_ipsec_create),
+ PLUGIN_PROVIDE (CUSTOM, "kernel-ipsec"),
+ PLUGIN_CALLBACK (kernel_net_register, kernel_vpp_net_create),
+ PLUGIN_PROVIDE (CUSTOM, "kernel-net"),
+ };
+ *features = f;
+ return countof (f);
+}
+
+METHOD (plugin_t, destroy, void, private_kernel_vpp_plugin_t *this)
+{
+ if (this->vac)
+ {
+ lib->set (lib, "kernel-vpp-vac", NULL);
+ this->vac->destroy (this->vac);
+ }
+ free (this);
+}
+
+plugin_t *
+kernel_vpp_plugin_create ()
+{
+ private_kernel_vpp_plugin_t *this;
+
+ INIT(this,
+ .public = {
+ .plugin = {
+ .get_name = _get_name,
+ .get_features = _get_features,
+ .destroy = _destroy,
+ },
+ },
+ );
+
+ this->vac = vac_create ("strongswan");
+ if (!this->vac)
+ {
+ DBG1 (DBG_KNL, "vac_create failed");
+ destroy (this);
+ return NULL;
+ }
+ lib->set (lib, "kernel-vpp-vac", this->vac);
+
+ return &this->public.plugin;
+}
diff --git a/extras/strongswan/vpp_sswan/kernel_vpp_plugin.h b/extras/strongswan/vpp_sswan/kernel_vpp_plugin.h
new file mode 100644
index 0000000..0214029
--- /dev/null
+++ b/extras/strongswan/vpp_sswan/kernel_vpp_plugin.h
@@ -0,0 +1,34 @@
+#ifndef KERNEL_VPP_PLUGIN_H_
+#define KERNEL_VPP_PLUGIN_H_
+/*
+ * Copyright (c) 2022 Intel and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <plugins/plugin.h>
+
+typedef struct kernel_vpp_plugin_t kernel_vpp_plugin_t;
+
+/**
+ * vpp kernel interface plugin
+ */
+struct kernel_vpp_plugin_t
+{
+
+ /**
+ * implements plugin interface
+ */
+ plugin_t plugin;
+};
+
+#endif /** KERNEL_VPP_PLUGIN_H_ @}*/
diff --git a/extras/strongswan/vpp_sswan/kernel_vpp_shared.c b/extras/strongswan/vpp_sswan/kernel_vpp_shared.c
new file mode 100644
index 0000000..9eabb68
--- /dev/null
+++ b/extras/strongswan/vpp_sswan/kernel_vpp_shared.c
@@ -0,0 +1,622 @@
+/*
+ * Copyright (c) 2022 Intel and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <library.h>
+#include <utils/debug.h>
+#include <threading/thread.h>
+#include <threading/condvar.h>
+#include <threading/mutex.h>
+#include <collections/array.h>
+#include <collections/hashtable.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vlibmemory/memclnt.api_enum.h>
+
+#include "kernel_vpp_shared.h"
+
+#define vl_typedefs
+#define vl_endianfun
+/* Include the (first) vlib-api API definition layer */
+#include <vlibmemory/vl_memory_api_h.h>
+/* Include the current layer (third) vpp API definition layer */
+#include <vpp/api/vpe_types.api.h>
+#include <vpp/api/vpe.api.h>
+#undef vl_typedefs
+#undef vl_endianfun
+
+typedef struct private_vac_t private_vac_t;
+typedef struct vl_api_header_t vl_api_header_t;
+typedef struct vl_api_rheader_t vl_api_rheader_t;
+typedef struct want_event_reply_t want_event_reply_t;
+
+vac_t *vac;
+
+/**
+ * Private variables and functions of vac_t class.
+ */
+struct private_vac_t
+{
+
+ /**
+ * public part of the vac_t object.
+ */
+ vac_t public;
+
+ /**
+ * Timeout for VPP API replies, in ms
+ */
+ uint16_t read_timeout;
+
+ /**
+ * True if connected to VPP vlib
+ */
+ bool connected_to_vlib;
+
+ /**
+ * True if receive thread is running
+ */
+ bool rx_is_running;
+
+ /**
+ * Receive thread
+ */
+ thread_t *rx;
+
+ /**
+ * Mutex to lock receive queue
+ */
+ mutex_t *queue_lock;
+
+ /**
+ * Condition variable rx thread susspend
+ */
+ condvar_t *suspend_cv;
+
+ /**
+ * Condition variable rx thread resume
+ */
+ condvar_t *resume_cv;
+
+ /**
+ * Condition variable rx thread terminate
+ */
+ condvar_t *terminate_cv;
+
+ /**
+ * Mutex to lock send VPP API message entries
+ */
+ mutex_t *entries_lock;
+
+ /**
+ * VPP API message entries currently active, uintptr_t seq => entry_t
+ */
+ hashtable_t *entries;
+
+ /**
+ * Mutex to lock VPP API event entries
+ */
+ mutex_t *events_lock;
+
+ /**
+ * VPP API event entries currently active, uintptr_t id = event_t
+ */
+ hashtable_t *events;
+
+ /**
+ * Current sequence number for VPP API messages
+ */
+ refcount_t seq;
+};
+
+/**
+ * VPP API message header
+ */
+struct vl_api_header_t
+{
+
+ /** message ID */
+ uint16_t _vl_msg_id;
+
+ /** opaque cookie to identify the client */
+ uint32_t client_index;
+
+ /** client context, to match reply with request */
+ uint32_t context;
+} __attribute__ ((packed));
+
+/**
+ * VPP API response message header
+ */
+struct vl_api_rheader_t
+{
+
+ /** message ID */
+ uint16_t _vl_msg_id;
+
+ /** opaque cookie to identify the client */
+ uint32_t context;
+} __attribute__ ((packed));
+
+/**
+ * VPP API register event response message header
+ */
+struct want_event_reply_t
+{
+
+ /** message ID */
+ uint16_t _vl_msg_id;
+
+ /** opaque cookie to identify the client */
+ uint32_t context;
+
+ /** retrun code for the request */
+ int32_t retval;
+} __attribute__ ((packed));
+
+/**
+ * VPP API request entry the answer for a waiting thread is collected in
+ */
+typedef struct
+{
+ /** Condition variable thread is waiting */
+ condvar_t *condvar;
+ /** Array of reply msgs in a multi-message response, as struct rmsgbuf_t */
+ array_t *rmsgs;
+ /** All response messages received? */
+ bool complete;
+ /** Is VPP API dump? */
+ bool is_dump;
+} entry_t;
+
+/**
+ * Reply message buffer
+ */
+typedef struct
+{
+ /** Data length */
+ uint32_t data_len;
+ /** Reply data */
+ uint8_t data[0];
+} rmsgbuf_t;
+
+/**
+ * VPP API event entry
+ */
+typedef struct
+{
+ /** Event callback */
+ event_cb_t cb;
+ /** User data passed to callback */
+ void *ctx;
+} event_t;
+
+/**
+ * Free VPP API message
+ */
+static void
+vac_free (void *msg)
+{
+ vl_msg_api_free (msg);
+}
+
+/**
+ * Process a single VPP API message
+ */
+static void
+vac_api_handler (private_vac_t *this, void *msg)
+{
+ vl_api_rheader_t *rmp;
+ entry_t *entry;
+ rmsgbuf_t *rmsg;
+ uintptr_t seq, event_id;
+ u16 id = ntohs (*((u16 *) msg));
+ msgbuf_t *msgbuf = (msgbuf_t *) (((u8 *) msg) - offsetof (msgbuf_t, data));
+ int l = ntohl (msgbuf->data_len);
+ event_t *event;
+
+ if (l == 0)
+ {
+ DBG2 (DBG_KNL, "vac msg ID %d has wrong len %d", id, l);
+ vac_free (msg);
+ return;
+ }
+
+ rmp = (void *) msg;
+ seq = (uintptr_t) rmp->context;
+
+ this->entries_lock->lock (this->entries_lock);
+ entry = this->entries->get (this->entries, (void *) seq);
+ if (entry)
+ {
+ if (entry->is_dump)
+ {
+ u16 msg_id =
+ vl_msg_api_get_msg_index ((u8 *) "control_ping_reply_f6b0b8ca");
+ if (id == msg_id)
+ {
+ entry->complete = TRUE;
+ entry->condvar->signal (entry->condvar);
+ vac_free (msg);
+ this->entries_lock->unlock (this->entries_lock);
+ return;
+ }
+ }
+ else
+ {
+ entry->complete = TRUE;
+ entry->condvar->signal (entry->condvar);
+ }
+
+ rmsg = malloc (l + sizeof (msgbuf_t));
+ rmsg->data_len = l;
+ memcpy (rmsg->data, msg, l);
+ array_insert (entry->rmsgs, ARRAY_TAIL, rmsg);
+ }
+ else
+ {
+ this->events_lock->lock (this->events_lock);
+ event_id = (uintptr_t) id;
+ event = this->events->get (this->events, (void *) event_id);
+ if (event)
+ event->cb (msg, l, event->ctx);
+ else
+ DBG1 (DBG_KNL, "received unknown vac msg seq %u id %d len %d, ignored",
+ seq, id, l);
+ this->events_lock->unlock (this->events_lock);
+ }
+
+ this->entries_lock->unlock (this->entries_lock);
+ vac_free (msg);
+}
+
+/**
+ * VPP API receive thread
+ */
+static void *
+vac_rx_thread_fn (private_vac_t *this)
+{
+ svm_queue_t *q;
+ api_main_t *am = vlibapi_get_main ();
+ vl_api_memclnt_keepalive_t *mp;
+ vl_api_memclnt_keepalive_reply_t *rmp;
+ vl_shmem_hdr_t *shmem_hdr;
+ uword msg;
+
+ q = am->vl_input_queue;
+
+ while (TRUE)
+ {
+ while (!svm_queue_sub (q, (u8 *) &msg, SVM_Q_WAIT, 0))
+ {
+ u16 id = ntohs (*((u16 *) msg));
+ switch (id)
+ {
+ case VL_API_RX_THREAD_EXIT:
+ vl_msg_api_free ((void *) msg);
+ this->queue_lock->lock (this->queue_lock);
+ this->terminate_cv->signal (this->terminate_cv);
+ this->queue_lock->unlock (this->queue_lock);
+ DBG3 (DBG_KNL, "vac received rx thread exit [%d]",
+ VL_API_RX_THREAD_EXIT);
+ thread_exit (NULL);
+ return NULL;
+ break;
+
+ case VL_API_MEMCLNT_RX_THREAD_SUSPEND:
+ vl_msg_api_free ((void *) msg);
+ this->queue_lock->lock (this->queue_lock);
+ this->suspend_cv->signal (this->suspend_cv);
+ this->resume_cv->wait (this->resume_cv, this->queue_lock);
+ this->queue_lock->unlock (this->queue_lock);
+ DBG3 (DBG_KNL, "vac received rx thread suspend [%d]",
+ VL_API_MEMCLNT_RX_THREAD_SUSPEND);
+ break;
+
+ case VL_API_MEMCLNT_READ_TIMEOUT:
+ DBG3 (DBG_KNL, "vac received read timeout [%d]",
+ VL_API_MEMCLNT_READ_TIMEOUT);
+ vl_msg_api_free ((void *) msg);
+ break;
+
+ case VL_API_MEMCLNT_KEEPALIVE:
+ mp = (void *) msg;
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ memset (rmp, 0, sizeof (*rmp));
+ u16 msg_id = vl_msg_api_get_msg_index (
+ (u8 *) "memclnt_keepalive_reply_e8d4e804");
+ rmp->_vl_msg_id = ntohs (msg_id);
+ rmp->context = mp->context;
+ shmem_hdr = am->shmem_hdr;
+ vl_msg_api_send_shmem (shmem_hdr->vl_input_queue, (u8 *) &rmp);
+ vl_msg_api_free ((void *) msg);
+ DBG3 (DBG_KNL, "vac received keepalive %d",
+ VL_API_MEMCLNT_KEEPALIVE);
+ break;
+
+ default:
+ vac_api_handler (this, (void *) msg);
+ }
+ }
+ }
+
+ return NULL;
+}
+
+METHOD (vac_t, destroy, void, private_vac_t *this)
+{
+ if (this->connected_to_vlib)
+ {
+ if (this->rx)
+ {
+ api_main_t *am = vlibapi_get_main ();
+ vl_api_rx_thread_exit_t *ep;
+ bool timed_out;
+ ep = vl_msg_api_alloc (sizeof (*ep));
+ memset (ep, 0, sizeof (*ep));
+ u16 msg_id =
+ vl_msg_api_get_msg_index ((u8 *) "rx_thread_exit_c3a3a452");
+ ep->_vl_msg_id = ntohs (msg_id);
+ vl_msg_api_send_shmem (am->vl_input_queue, (u8 *) &ep);
+ this->queue_lock->lock (this->queue_lock);
+ timed_out = this->terminate_cv->timed_wait (this->terminate_cv,
+ this->queue_lock, 5000);
+ this->queue_lock->unlock (this->queue_lock);
+ if (timed_out)
+ this->rx->cancel (this->rx);
+ else
+ this->rx->join (this->rx);
+ }
+ vl_client_disconnect ();
+ vl_client_api_unmap ();
+ }
+
+ this->queue_lock->destroy (this->queue_lock);
+ this->suspend_cv->destroy (this->suspend_cv);
+ this->resume_cv->destroy (this->resume_cv);
+ this->terminate_cv->destroy (this->terminate_cv);
+ this->entries->destroy (this->entries);
+ this->entries_lock->destroy (this->entries_lock);
+ this->events->destroy (this->events);
+ this->events_lock->destroy (this->events_lock);
+
+ vac = NULL;
+ free (this);
+}
+
+/**
+ * Write a VPP API message to shared memory
+ */
+static status_t
+vac_write (private_vac_t *this, char *p, int l, uint32_t ctx)
+{
+ api_main_t *am = vlibapi_get_main ();
+ vl_api_header_t *mp = vl_msg_api_alloc (l);
+ memset (mp, 0, sizeof (*mp));
+ svm_queue_t *q;
+
+ if (!this->connected_to_vlib)
+ return FAILED;
+
+ if (!mp)
+ return FAILED;
+
+ memcpy (mp, p, l);
+ mp->client_index = am->my_client_index;
+ mp->context = ctx;
+ q = am->shmem_hdr->vl_input_queue;
+ if (svm_queue_add (q, (u8 *) &mp, 0))
+ {
+ DBG1 (DBG_KNL, "vac vpe_api_write failed");
+ vac_free (mp);
+ return FAILED;
+ }
+
+ return SUCCESS;
+}
+
+/**
+ * Clean up a thread waiting entry
+ */
+static void
+destroy_entry (entry_t *entry)
+{
+ entry->condvar->destroy (entry->condvar);
+ array_destroy_function (entry->rmsgs, (void *) free, NULL);
+ free (entry);
+}
+
+/**
+ * Send VPP API message and wait for a reply
+ */
+static status_t
+send_vac (private_vac_t *this, char *in, int in_len, char **out, int *out_len,
+ bool is_dump)
+{
+ entry_t *entry;
+ uint32_t ctx = ref_get (&this->seq);
+ uintptr_t seq = (uintptr_t) ctx;
+ rmsgbuf_t *rmsg;
+ char *ptr;
+ int i;
+
+ this->entries_lock->lock (this->entries_lock);
+ INIT (entry, .condvar = condvar_create (CONDVAR_TYPE_DEFAULT),
+ .rmsgs = array_create (0, 0), .is_dump = is_dump, );
+ this->entries->put (this->entries, (void *) seq, entry);
+
+ if (vac_write (this, in, in_len, ctx))
+ {
+ destroy_entry (entry);
+ this->entries_lock->unlock (this->entries_lock);
+ return FAILED;
+ }
+
+ if (is_dump)
+ {
+ vl_api_control_ping_t *mp;
+ status_t rv;
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+ u16 msg_id = vl_msg_api_get_msg_index ((u8 *) "control_ping_51077d14");
+ mp->_vl_msg_id = ntohs (msg_id);
+ rv = vac_write (this, (char *) mp, sizeof (*mp), ctx);
+ vl_msg_api_free (mp);
+ if (rv)
+ {
+ DBG2 (DBG_KNL, "vac_write VL_API_CONTROL_PING failed");
+ destroy_entry (entry);
+ this->entries_lock->unlock (this->entries_lock);
+ return FAILED;
+ }
+ }
+
+ while (!entry->complete)
+ {
+ if (this->read_timeout)
+ {
+ if (entry->condvar->timed_wait (entry->condvar, this->entries_lock,
+ this->read_timeout * 1000))
+ {
+ break;
+ }
+ }
+ else
+ {
+ entry->condvar->wait (entry->condvar, this->entries_lock);
+ }
+ }
+
+ this->entries->remove (this->entries, (void *) seq);
+ this->entries_lock->unlock (this->entries_lock);
+
+ if (!entry->complete)
+ {
+ destroy_entry (entry);
+ DBG1 (DBG_KNL, "vac timeout");
+ return OUT_OF_RES;
+ }
+
+ for (i = 0, *out_len = 0; i < array_count (entry->rmsgs); i++)
+ {
+ array_get (entry->rmsgs, i, &rmsg);
+ *out_len += rmsg->data_len;
+ }
+ ptr = malloc (*out_len);
+ *out = ptr;
+ while (array_remove (entry->rmsgs, ARRAY_HEAD, &rmsg))
+ {
+ memcpy (ptr, rmsg->data, rmsg->data_len);
+ ptr += rmsg->data_len;
+ free (rmsg);
+ }
+
+ destroy_entry (entry);
+
+ return SUCCESS;
+}
+
+METHOD (vac_t, vac_send, status_t, private_vac_t *this, char *in, int in_len,
+ char **out, int *out_len)
+{
+ return send_vac (this, in, in_len, out, out_len, FALSE);
+}
+
+METHOD (vac_t, vac_send_dump, status_t, private_vac_t *this, char *in,
+ int in_len, char **out, int *out_len)
+{
+ return send_vac (this, in, in_len, out, out_len, TRUE);
+}
+
+METHOD (vac_t, register_event, status_t, private_vac_t *this, char *in,
+ int in_len, event_cb_t cb, uint16_t event_id, void *ctx)
+{
+ char *out;
+ int out_len;
+ want_event_reply_t *rmp;
+ uintptr_t id = (uintptr_t) event_id;
+ event_t *event;
+
+ if (vac->send (vac, in, in_len, &out, &out_len))
+ return FAILED;
+ rmp = (void *) out;
+ if (rmp->retval)
+ return FAILED;
+ free (out);
+ vl_msg_api_free (in);
+ this->events_lock->lock (this->events_lock);
+ INIT (event, .cb = cb, .ctx = ctx, );
+ this->events->put (this->events, (void *) id, event);
+ this->events_lock->unlock (this->events_lock);
+
+ return SUCCESS;
+}
+
+vac_t *
+vac_create (char *name)
+{
+ private_vac_t *this;
+
+ INIT(this,
+ .public = {
+ .destroy = _destroy,
+ .send = _vac_send,
+ .send_dump = _vac_send_dump,
+ .register_event = _register_event,
+ },
+ .rx_is_running = FALSE,
+ .read_timeout = lib->settings->get_int(lib->settings,
+ "%s.plugins.kernel-vpp.read_timeout", 0, lib->ns),
+ .queue_lock = mutex_create(MUTEX_TYPE_DEFAULT),
+ .suspend_cv = condvar_create(CONDVAR_TYPE_DEFAULT),
+ .resume_cv = condvar_create(CONDVAR_TYPE_DEFAULT),
+ .terminate_cv = condvar_create(CONDVAR_TYPE_DEFAULT),
+ .entries_lock = mutex_create(MUTEX_TYPE_RECURSIVE),
+ .entries = hashtable_create(hashtable_hash_ptr, hashtable_equals_ptr, 4),
+ .events_lock = mutex_create(MUTEX_TYPE_DEFAULT),
+ .events = hashtable_create(hashtable_hash_ptr, hashtable_equals_ptr, 4),
+ .seq = 0,
+ );
+
+ clib_mem_init_thread_safe (0, 256 << 20);
+
+ if (vl_client_api_map ("/vpe-api"))
+ {
+ DBG1 (DBG_KNL, "vac unable to map");
+ destroy (this);
+ return NULL;
+ }
+
+ if (vl_client_connect (name, 0, 32) < 0)
+ {
+ DBG1 (DBG_KNL, "vac unable to connect");
+ vl_client_api_unmap ();
+ destroy (this);
+ return NULL;
+ }
+
+ this->connected_to_vlib = TRUE;
+
+ this->rx = thread_create ((thread_main_t) vac_rx_thread_fn, this);
+ if (!this->rx)
+ {
+ vl_client_api_unmap ();
+ destroy (this);
+ return NULL;
+ }
+ this->rx_is_running = TRUE;
+
+ vac = &this->public;
+ return &this->public;
+}
diff --git a/extras/strongswan/vpp_sswan/kernel_vpp_shared.h b/extras/strongswan/vpp_sswan/kernel_vpp_shared.h
new file mode 100644
index 0000000..c699d49
--- /dev/null
+++ b/extras/strongswan/vpp_sswan/kernel_vpp_shared.h
@@ -0,0 +1,85 @@
+#ifndef KERNEL_VPP_SHARED_H_
+#define KERNEL_VPP_SHARED_H_
+/*
+ * Copyright (c) 2022 Intel and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+typedef struct vac_t vac_t;
+
+/**
+ * Callback function invoked for received event messages.
+ *
+ * @param data associated event message, destroyed by VPP API wrapper
+ * @param data_len length of the event message
+ * @param ctx user data, as passed to register_event
+ */
+typedef void (*event_cb_t) (char *data, int data_len, void *ctx);
+
+/**
+ * Wrapper around VPP binary API client.
+ */
+struct vac_t
+{
+
+ /**
+ * Destroy the VPP API client.
+ */
+ void (*destroy) (vac_t *this);
+
+ /**
+ * Send VPP API message and wait for a reply
+ *
+ * @param in VPP API message to send
+ * @param in_len length of the message to send
+ * @param out received VPP API message
+ * @param out_len length of the received message
+ */
+ status_t (*send) (vac_t *this, char *in, int in_len, char **out,
+ int *out_len);
+
+ /**
+ * Send VPP API dump message and wait for a reply.
+ *
+ * @param in VPP API message to send
+ * @param in_len length of the message to send
+ * @param out received VPP API message
+ * @param out_len length of the received message
+ */
+ status_t (*send_dump) (vac_t *this, char *in, int in_len, char **out,
+ int *out_len);
+
+ /**
+ * Register for VPP API event of a given kind.
+ *
+ * @param in VPP API event message to register
+ * @param in_len length of the event message to register
+ * @param cb callback function to register
+ * @param event_id event ID
+ * @param ctx user data passed to callback invocations
+ */
+ status_t (*register_event) (vac_t *this, char *in, int in_len, event_cb_t cb,
+ uint16_t event_id, void *ctx);
+};
+
+extern vac_t *vac;
+
+/**
+ * Establishing a binary API connection to VPP.
+ *
+ * @param name client name
+ * @return vac_t instance
+ */
+vac_t *vac_create (char *name);
+
+#endif /* KERNEL_VPP_SHARED_H_ */
diff --git a/extras/strongswan/vpp_sswan/swanctl.conf b/extras/strongswan/vpp_sswan/swanctl.conf
new file mode 100644
index 0000000..f3e7a78
--- /dev/null
+++ b/extras/strongswan/vpp_sswan/swanctl.conf
@@ -0,0 +1,35 @@
+connections {
+ net-net {
+ local_addrs = 192.168.0.2
+ remote_addrs = 192.168.0.1
+ local {
+ auth = psk
+ id = sun.strongswan.org
+ }
+ remote {
+ auth = psk
+ id = moon.strongswan.org
+ }
+ children {
+ net-net {
+ local_ts = 192.168.200.0/24
+ remote_ts = 192.168.100.0/24
+ esp_proposals = aes128-sha1-modp2048
+ rekey_time = 240m
+ }
+ }
+ version = 2
+ mobike = yes
+ encap = no # NAT-T if needed
+ proposals = aes128-sha256-x25519
+ }
+}
+secrets {
+ ike-net-net {
+ id = moon.strongswan.org
+ secret = simplepsk
+ }
+}
+
+# Include config snippets
+include conf.d/*.conf