wireless: T1627: initial rewrite of show-wireless.pl in Python

1 files changed, 158 insertions, 0 deletions

diff --git a/src/op_mode/show_wireless.py b/src/op_mode/show_wireless.py
new file mode 100755
index 000000000..aff882559
--- /dev/null
+++ b/src/op_mode/show_wireless.py
@@ -0,0 +1,158 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2019 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# 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, see <http://www.gnu.org/licenses/>.
+
+import argparse
+import re
+
+from sys import exit
+from copy import deepcopy
+from subprocess import Popen, PIPE, STDOUT
+
+from vyos.config import Config
+
+parser = argparse.ArgumentParser()
+parser.add_argument("-s", "--scan", help="Scan for Wireless APs on given interface, e.g. 'wlan0'")
+parser.add_argument("-b", "--brief", action="store_true", help="Show wireless configuration")
+parser.add_argument("-c", "--stations", help="Show wireless clients connected on interface, e.g. 'wlan0'")
+
+def _cmd(command):
+    p = Popen(command, stdout=PIPE, stderr=STDOUT, shell=True)
+    tmp = p.communicate()[0].strip()
+    return tmp.decode()
+
+def show_brief():
+    config = Config()
+    if len(config.list_effective_nodes('interfaces wireless')) == 0:
+        print("No Wireless interfaces configured")
+        exit(0)
+
+    interfaces = []
+    for intf in config.list_effective_nodes('interfaces wireless'):
+        config.set_level('interfaces wireless {}'.format(intf))
+        data = {
+            'name': intf,
+            'type': '',
+            'ssid': '',
+            'channel': ''
+        }
+        data['type'] = config.return_effective_value('type')
+        data['ssid'] = config.return_effective_value('ssid')
+        data['channel'] = config.return_effective_value('channel')
+
+        interfaces.append(data)
+
+    return interfaces
+
+def ssid_scan(intf):
+    tmp = _cmd('/sbin/iw dev {} scan ap-force'.format(intf))
+    networks = []
+    data = {
+        'ssid': '',
+        'mac': '',
+        'channel': '',
+        'signal': ''
+    }
+    re_mac = re.compile(r'([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})')
+    for line in tmp.splitlines():
+        if line.startswith('BSS '):
+            ssid = deepcopy(data)
+            ssid['mac'] = re.search(re_mac, line).group()
+
+        elif line.lstrip().startswith('SSID: '):
+            # SSID can be "    SSID: WLAN-57 6405", thus strip all leading whitespaces
+            ssid['ssid'] = line.lstrip().split(':')[-1].lstrip()
+
+        elif line.lstrip().startswith('signal: '):
+            # Siganl can be "   signal: -67.00 dBm", thus strip all leading whitespaces
+            ssid['signal'] = line.lstrip().split(':')[-1].split()[0]
+
+        elif line.lstrip().startswith('DS Parameter set: channel'):
+            # Channel can be "        DS Parameter set: channel 6" , thus
+            # strip all leading whitespaces
+            ssid['channel'] = line.lstrip().split(':')[-1].split()[-1]
+            networks.append(ssid)
+            continue
+
+    return networks
+
+def show_clients(intf):
+    tmp = _cmd('/sbin/iw dev {} station dump'.format(intf))
+    clients = []
+    data = {
+        'mac': '',
+        'signal': '',
+        'rx_bytes': '',
+        'rx_packets': '',
+        'tx_bytes': '',
+        'tx_packets': ''
+    }
+    re_mac = re.compile(r'([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})')
+    for line in tmp.splitlines():
+        if line.startswith('Station'):
+            client = deepcopy(data)
+            client['mac'] = re.search(re_mac, line).group()
+
+        elif line.lstrip().startswith('signal avg:'):
+            client['signal'] = line.lstrip().split(':')[-1].lstrip().split()[0]
+
+        elif line.lstrip().startswith('rx bytes:'):
+            client['rx_bytes'] = line.lstrip().split(':')[-1].lstrip()
+
+        elif line.lstrip().startswith('rx packets:'):
+            client['rx_packets'] = line.lstrip().split(':')[-1].lstrip()
+
+        elif line.lstrip().startswith('tx bytes:'):
+            client['tx_bytes'] = line.lstrip().split(':')[-1].lstrip()
+
+        elif line.lstrip().startswith('tx packets:'):
+            client['tx_packets'] = line.lstrip().split(':')[-1].lstrip()
+            clients.append(client)
+            continue
+
+    return clients
+
+if __name__ == '__main__':
+    args = parser.parse_args()
+
+    if args.scan:
+        print("Address            SSID                          Channel  Signal (dbm)")
+        for network in ssid_scan(args.scan):
+            print("{:<17}  {:<32}  {:>3}  {}".format(network['mac'],
+                                                     network['ssid'],
+                                                     network['channel'],
+                                                     network['signal']))
+        exit(0)
+
+    elif args.brief:
+        print("Interface  Type          SSID                         Channel")
+        for intf in show_brief():
+            print("{:<9}  {:<12}  {:<32} {:>3}".format(intf['name'],
+                                                      intf['type'],
+                                                      intf['ssid'],
+                                                      intf['channel']))
+        exit(0)
+
+    elif args.stations:
+        print("Station            Signal     RX: bytes    packets        TX: bytes     packets")
+        for client in show_clients(args.stations):
+            print("{:<17}  {:>3}  {:>15}  {:>9}  {:>15}  {:>10} ".format(client['mac'],
+                                                 client['signal'], client['rx_bytes'], client['rx_packets'], client['tx_bytes'], client['tx_packets']))
+
+        exit(0)
+
+    else:
+        parser.print_help()
+        exit(1)