1 files changed, 142 insertions, 0 deletions
diff --git a/python/vyos/ifconfig/vpp/gre.py b/python/vyos/ifconfig/vpp/gre.py
new file mode 100644
index 000000000..4cdb27213
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+++ b/python/vyos/ifconfig/vpp/gre.py
@@ -0,0 +1,142 @@
+# VyOS implementation of VPP GRE interface
+#
+# Copyright (C) VyOS Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+from vyos.ifconfig import Interface
+from vyos.ifconfig.vpp.interface import VPPInterface
+
+
+class VPPGREInterface(Interface, VPPInterface):
+    """
+    Class representing a GRE (Generic Routing Encapsulation) interface.
+    """
+
+    # Mapping of tunnel types https://github.com/FDio/vpp/blob/stable/2406/src/plugins/gre/gre.api#L25-L35
+    TUNNEL_TYPE_MAP = {
+        'l3': 0,
+        'teb': 1,
+        'erspan': 2,
+    }
+
+    MODE_MAP = {
+        'point-to-point': 0,
+        # 'point-to-multipoint': 1,
+    }
+
+    def __init__(self, ifname, config):
+        self.ifname = ifname
+        self.instance = int(ifname.removeprefix('vppgre'))
+        self.vpp_ifname = f'gre{self.instance}'
+
+        # Initialize Interface (kernel) and VPP part
+        super().__init__(ifname)
+        VPPInterface.__init__(self, self.vpp_ifname)
+
+        self.index = self.vpp.get_sw_if_index(self.vpp_ifname)
+        self.state = 'up' if 'disable' not in config else 'down'
+        self.src_address = config.get('source_address')
+        self.dst_address = config.get('remote')
+        self.tunnel_type = self.TUNNEL_TYPE_MAP.get(config.get('tunnel_type'), 0)
+        self.mode = self.MODE_MAP['point-to-point']
+        self.key = int(config.get('key', 0))
+
+    def _create(self):
+        pass
+
+    def get_gre(self):
+        tunnels = self.vpp.api.gre_tunnel_dump_v2(sw_if_index=self.index)
+        return tunnels if tunnels else None
+
+    def add_gre(self):
+        """Create GRE interface
+        https://github.com/FDio/vpp/blob/stable/2406/src/plugins/gre/gre.api
+        Example:
+            from vyos.ifconfig.vpp import VPPGREInterface
+            a = VPPGREInterface(ifname='vppgre0', config)
+            a.add_gre()
+        """
+        self.vpp.api.gre_tunnel_add_del_v2(
+            is_add=True,
+            tunnel={
+                'src': self.src_address,
+                'dst': self.dst_address,
+                'instance': self.instance,
+                'mode': self.mode,
+                'type': self.tunnel_type,
+                'key': self.key,
+            },
+        )
+        # Add LCP pair (kernel) interface
+        self.kernel_add()
+        # Set interface state
+        self.set_state(self.state)
+        self.set_admin_state(self.state)
+        self.index = self.vpp.get_sw_if_index(self.vpp_ifname)
+
+    def delete_gre(self):
+        """Delete GRE interface
+        Example:
+            from vyos.ifconfig.vpp import VPPGREInterface
+            a = VPPGREInterface(ifname='vppgre0', config)
+            a.delete_gre()
+        """
+        gre = self.get_gre()
+        if gre:
+            return self.vpp.api.gre_tunnel_add_del_v2(
+                is_add=False,
+                tunnel={
+                    'src': gre.tunnel.src,
+                    'dst': gre.tunnel.dst,
+                    'key': gre.tunnel.key,
+                },
+            )
+
+    def kernel_add(self):
+        """Add LCP pair
+        Example:
+            from vyos.ifconfig.vpp import VPPGREInterface
+            a = VPPGREInterface(ifname='vppgre0', config)
+            a.kernel_add()
+        """
+        self.vpp.lcp_pair_add(self.vpp_ifname, self.ifname, 'tun')
+
+    def kernel_delete(self):
+        """Delete LCP pair
+        Example:
+            from vyos.ifconfig.vpp import VPPGREInterface
+            a = VPPGREInterface(ifname='vppgre0', config)
+            a.kernel_delete()
+        """
+        self.vpp.lcp_pair_del(self.vpp_ifname, self.ifname)
+
+    def remove(self):
+        if self.index:
+            # Delete lcp pair interface
+            if self.vpp.lcp_pair_find(vpp_name_hw=self.vpp_ifname):
+                self.kernel_delete()
+
+            # Delete gre interface
+            self.delete_gre()
+
+    def update(self, config):
+        # Add gre interface
+        self.add_gre()
+
+        # Apply VPP-specific interface settings
+        VPPInterface.update(self, config)
+
+        super().update(config)