T1759: Migrating interfaces

2 files changed, 175 insertions, 1 deletions

diff --git a/python/vyos/interface.py b/python/vyos/interface.py
new file mode 100644
index 000000000..6d57d972b
--- /dev/null
+++ b/python/vyos/interface.py
@@ -0,0 +1,131 @@
+# Copyright 2019 VyOS maintainers and contributors <maintainers@vyos.io>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+
+import vyos
+from vyos.config import Config
+import vyos.interfaces
+
+import re
+import json
+
+import subprocess
+import time
+from datetime import timedelta
+import glob
+from os.path import isfile
+from tabulate import tabulate
+from hurry.filesize import size,alternative
+
+class Interface():
+
+    intf = None
+    intf_type = None
+
+    def __init__(self,intf):
+        self.intf = intf
+        self.intf_type = vyos.interfaces.get_type_of_interface(self.intf)
+
+    def print_interface(self):
+        if (self.intf_type == 'wireguard'):
+            self.print_wireguard_interface()
+
+        self.print_interface_stats()
+
+    def print_interface_stats(self):
+        stats = self.get_interface_stats()
+        rx = [['bytes','packets','errors','dropped','overrun','mcast'],[stats['rx_bytes'],stats['rx_packets'],stats['rx_errors'],stats['rx_dropped'],stats['rx_over_errors'],stats['multicast']]]
+        tx = [['bytes','packets','errors','dropped','carrier','collisions'],[stats['tx_bytes'],stats['tx_packets'],stats['tx_errors'],stats['tx_dropped'],stats['tx_carrier_errors'],stats['collisions']]]
+        output = "RX: \n"
+        output += tabulate(rx,headers="firstrow",numalign="right",tablefmt="plain")
+        output += "\n\nTX: \n"
+        output += tabulate(tx,headers="firstrow",numalign="right",tablefmt="plain")
+        print('  '.join(('\n'+output.lstrip()).splitlines(True)))
+
+    def get_interface_stats(self):
+        interface_stats = dict()
+        devices = [f for f in glob.glob("/sys/class/net/**/statistics")]
+        for dev_path in devices:
+            metrics = [f for f in glob.glob(dev_path +"/**")]
+            dev = re.findall(r"/sys/class/net/(.*)/statistics",dev_path)[0]
+            dev_dict = dict()
+            for metric_path in metrics:
+                metric = metric_path.replace(dev_path+"/","")
+                if isfile(metric_path):
+                    data = open(metric_path, 'r').read()[:-1]
+                    dev_dict[metric] = int(data)
+            interface_stats[dev] = dev_dict
+        return interface_stats[self.intf]
+
+    def print_wireguard_interface(self):
+        output = subprocess.check_output(["wg", "show", self.intf], universal_newlines=True)
+        wgdump = vyos.interfaces.wireguard_dump()[self.intf]
+        c = Config()
+        c.set_level("interfaces wireguard {}".format(self.intf))
+        description = c.return_effective_value("description")
+
+        print ("interface: {}".format(self.intf))
+        """ if the interface has a description, modify the output to include it """
+        if (description):
+            print ("  description: {}".format(description))
+            output = re.sub(r"interface: {}".format(re.escape(self.intf)),"interface: {}\n  Description: {}".format(self.intf,description),output)
+
+        print ("  public key: {}".format(wgdump['public_key']))
+        print ("  private key: (hidden)")
+        print ("  listening port: {}".format(wgdump['listen_port']))
+        print ()
+
+        for peer in c.list_effective_nodes(' peer'):
+            if wgdump['peers']:
+                pubkey = c.return_effective_value("peer {} pubkey".format(peer))
+                if pubkey in wgdump['peers']:
+                    wgpeer = wgdump['peers'][pubkey] 
+
+                    print ("  peer: {}".format(peer))
+                    print ("    public key: {}".format(pubkey))
+
+                    """ figure out if the tunnel is recently active or not """
+                    status = "inactive"
+                    if (wgpeer['latest_handshake'] is None):
+                        """ no handshake ever """
+                        status = "inactive"
+                    else:
+                        if int(wgpeer['latest_handshake']) > 0:
+                            delta = timedelta(seconds=int(time.time() - wgpeer['latest_handshake']))
+                            print ("    latest handshake: {}".format(delta))
+                            if (time.time() - int(wgpeer['latest_handshake']) < (60*5)):
+                                """ Five minutes and the tunnel is still active """
+                                status = "active"
+                            else:
+                                """ it's been longer than 5 minutes """
+                                status = "inactive"
+                        elif int(wgpeer['latest_handshake']) == 0:
+                            """ no handshake ever """
+                            status = "inactive"
+                        print ("    status: {}".format(status))    
+
+                    if wgpeer['endpoint'] is not None:
+                        print ("    endpoint: {}".format(wgpeer['endpoint']))
+
+                    if wgpeer['allowed_ips'] is not None:
+                        print ("    allowed ips: {}".format(",".join(wgpeer['allowed_ips']).replace(",",", ")))
+                    
+                    if wgpeer['transfer_rx'] > 0 or wgpeer['transfer_tx'] > 0: 
+                        rx_size =size(wgpeer['transfer_rx'],system=alternative)
+                        tx_size =size(wgpeer['transfer_tx'],system=alternative)
+                        print ("    transfer: {} received, {} sent".format(rx_size,tx_size))
+
+                    if wgpeer['persistent_keepalive'] is not None:
+                        print ("    persistent keepalive: every {} seconds".format(wgpeer['persistent_keepalive']))
+                print()
diff --git a/python/vyos/interfaces.py b/python/vyos/interfaces.py
index d69ce9d04..ecf061d17 100644
--- a/python/vyos/interfaces.py
+++ b/python/vyos/interfaces.py
@@ -16,9 +16,9 @@
 import re
 import json
 
+import subprocess
 import netifaces
 
-
 intf_type_data_file = '/usr/share/vyos/interface-types.json'
 
 def list_interfaces():
@@ -54,3 +54,46 @@ def get_type_of_interface(intf):
             return key
 
     raise ValueError("No type found for interface name: {0}".format(intf))
+
+def wireguard_dump():
+    """Dump wireguard data in a python friendly way."""
+    last_device=None
+    output = {}
+    
+    # Dump wireguard connection data
+    _f = subprocess.check_output(["wg", "show", "all", "dump"]).decode()
+    for line in _f.split('\n'):
+        if not line:
+          # Skip empty lines and last line
+          continue
+        items = line.split('\t')
+
+        if last_device != items[0]:
+            # We are currently entering a new node
+            device, private_key, public_key, listen_port, fw_mark = items
+            last_device = device
+            
+            output[device] = {
+                'private_key': None if private_key == '(none)' else private_key,
+                'public_key': None if public_key == '(none)' else public_key,
+                'listen_port': int(listen_port),
+                'fw_mark': None if fw_mark == 'off' else int(fw_mark),
+                'peers': {},
+                } 
+        else:
+            # We are entering a peer
+            device, public_key, preshared_key, endpoint, allowed_ips, latest_handshake, transfer_rx, transfer_tx, persistent_keepalive = items
+            if allowed_ips == '(none)':
+                allowed_ips = []
+            else:
+                allowed_ips = allowed_ips.split('\t')
+            output[device]['peers'][public_key] = {
+                'preshared_key': None if preshared_key == '(none)' else preshared_key,
+                'endpoint': None if endpoint == '(none)' else endpoint,
+                'allowed_ips': allowed_ips,
+                'latest_handshake': None if latest_handshake == '0' else int(latest_handshake),
+                'transfer_rx': int(transfer_rx),
+                'transfer_tx': int(transfer_tx),
+                'persistent_keepalive': None if persistent_keepalive == 'off' else int(persistent_keepalive),
+           } 
+    return output