#!/usr/bin/env python3 # Copyright 2017, 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 os import re import sys import glob import datetime import argparse import netifaces from vyos.ifconfig import Section from vyos.ifconfig import Interface from vyos.ifconfig import VRRP from vyos.util import cmd, call # interfaces = Sections.reserved() interfaces = ['eno', 'ens', 'enp', 'enx', 'eth', 'vmnet', 'lo', 'tun', 'wan', 'pppoe'] glob_ifnames = '/sys/class/net/({})*'.format('|'.join(interfaces)) actions = {} def register(name): """ Decorator to register a function into actions with a name. `actions[name]' can be used to call the registered functions. We wrap each function in a SIGPIPE handler as all registered functions can be subject to a broken pipe if there are a lot of interfaces. """ def _register(function): def handled_function(*args, **kwargs): try: function(*args, **kwargs) except BrokenPipeError: # Flush output to /dev/null and bail out. os.dup2(os.open(os.devnull, os.O_WRONLY), sys.stdout.fileno()) sys.exit(1) actions[name] = handled_function return handled_function return _register def filtered_interfaces(ifnames, iftypes, vif, vrrp): """ get all the interfaces from the OS and returns them ifnames can be used to filter which interfaces should be considered ifnames: a list of interfaces names to consider, empty do not filter return an instance of the interface class """ allnames = Section.interfaces() vrrp_interfaces = VRRP.active_interfaces() if vrrp else [] for ifname in allnames: if ifnames and ifname not in ifnames: continue # return the class which can handle this interface name klass = Section.klass(ifname) # connect to the interface interface = klass(ifname, create=False, debug=False) if iftypes and interface.definition['section'] not in iftypes: continue if vif and not '.' in ifname: continue if vrrp and ifname not in vrrp_interfaces: continue yield interface def split_text(text, used=0): """ take a string and attempt to split it to fit with the width of the screen text: the string to split used: number of characted already used in the screen """ no_tty = call('tty -s') if no_tty: return text.split() returned = cmd('stty size') if len(returned) == 2: rows, columns = [int(_) for _ in returned] else: rows, columns = (40, 80) desc_len = columns - used line = '' for word in text.split(): if len(line) + len(word) < desc_len: line = f'{line} {word}' continue if line: yield line[1:] else: line = f'{line} {word}' yield line[1:] def get_vrrp_intf(): return [intf for intf in Section.interfaces() if intf.is_vrrp()] def get_counter_val(clear, now): """ attempt to correct a counter if it wrapped, copied from perl clear: previous counter now: the current counter """ # This function has to deal with both 32 and 64 bit counters if clear == 0: return now # device is using 64 bit values assume they never wrap value = now - clear if (now >> 32) != 0: return value # The counter has rolled. If the counter has rolled # multiple times since the clear value, then this math # is meaningless. if (value < 0): value = (4294967296 - clear) + now return value @register('help') def usage(*args): print(f"Usage: {sys.argv[0]} [intf=NAME|intf-type=TYPE|vif|vrrp] action=ACTION") print(f" NAME = " + ' | '.join(Section.interfaces())) print(f" TYPE = " + ' | '.join(Section.sections())) print(f" ACTION = " + ' | '.join(actions)) sys.exit(1) @register('allowed') def run_allowed(**kwarg): sys.stdout.write(' '.join(Section.interfaces())) def pppoe(ifname): out = cmd(f'ps -C pppd -f') if ifname in out: return 'C' elif ifname in [_.split('/')[-1] for _ in glob.glob('/etc/ppp/peers/pppoe*')]: return 'D' return '' @register('show') def run_show_intf(ifnames, iftypes, vif, vrrp): handled = [] for interface in filtered_interfaces(ifnames, iftypes, vif, vrrp): handled.append(interface.ifname) cache = interface.operational.load_counters() out = cmd(f'ip addr show {interface.ifname}') out = re.sub(f'^\d+:\s+','',out) if re.search('link/tunnel6', out): tunnel = cmd(f'ip -6 tun show {interface.ifname}') # tun0: ip/ipv6 remote ::2 local ::1 encaplimit 4 hoplimit 64 tclass inherit flowlabel inherit (flowinfo 0x00000000) tunnel = re.sub('.*encap', 'encap', tunnel) out = re.sub('(\n\s+)(link/tunnel6)', f'\g<1>{tunnel}\g<1>\g<2>', out) print(out) timestamp = int(cache.get('timestamp', 0)) if timestamp: when = interface.operational.strtime(timestamp) print(f' Last clear: {when}') description = interface.get_alias() if description: print(f' Description: {description}') print() print(interface.operational.formated_stats()) for ifname in ifnames: if ifname not in handled and ifname.startswith('pppoe'): state = pppoe(ifname) if not state: continue string = { 'C': 'Coming up', 'D': 'Link down', }[state] print('{}: {}'.format(ifname, string)) @register('show-brief') def run_show_intf_brief(ifnames, iftypes, vif, vrrp): format1 = '%-16s %-33s %-4s %s' format2 = '%-16s %s' print('Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down') print(format1 % ("Interface", "IP Address", "S/L", "Description")) print(format1 % ("---------", "----------", "---", "-----------")) handled = [] for interface in filtered_interfaces(ifnames, iftypes, vif, vrrp): handled.append(interface.ifname) oper_state = interface.operational.get_state() admin_state = interface.get_admin_state() intf = [interface.ifname,] oper = ['u', ] if oper_state in ('up', 'unknown') else ['D', ] admin = ['u', ] if admin_state in ('up', 'unknown') else ['A', ] addrs = [_ for _ in interface.get_addr() if not _.startswith('fe80::')] or ['-', ] descs = list(split_text(interface.get_alias(),0)) while intf or oper or admin or addrs or descs: i = intf.pop(0) if intf else '' a = addrs.pop(0) if addrs else '' d = descs.pop(0) if descs else '' s = [admin.pop(0)] if admin else [] l = [oper.pop(0)] if oper else [] if len(a) < 33: print(format1 % (i, a, '/'.join(s+l), d)) else: print(format2 % (i, a)) print(format1 % ('', '', '/'.join(s+l), d)) for ifname in ifnames: if ifname not in handled and ifname.startswith('pppoe'): state = pppoe(ifname) if not state: continue string = { 'C': 'u/D', 'D': 'A/D', }[state] print(format1 % (ifname, '', string, '')) @register('show-count') def run_show_counters(ifnames, iftypes, vif, vrrp): formating = '%-12s %10s %10s %10s %10s' print(formating % ('Interface', 'Rx Packets', 'Rx Bytes', 'Tx Packets', 'Tx Bytes')) for interface in filtered_interfaces(ifnames, iftypes, vif, vrrp): oper = interface.operational.get_state() if oper not in ('up','unknown'): continue stats = interface.operational.get_stats() cache = interface.operational.load_counters() print(formating % ( interface.ifname, get_counter_val(cache['rx_packets'], stats['rx_packets']), get_counter_val(cache['rx_bytes'], stats['rx_bytes']), get_counter_val(cache['tx_packets'], stats['tx_packets']), get_counter_val(cache['tx_bytes'], stats['tx_bytes']), )) @register('clear') def run_clear_intf(ifnames, iftypes, vif, vrrp): for interface in filtered_interfaces(ifnames, iftypes, vif, vrrp): print(f'Clearing {interface.ifname}') interface.operational.clear_counters() @register('reset') def run_reset_intf(ifnames, iftypes, vif, vrrp): for interface in filtered_interfaces(ifnames, iftypes, vif, vrrp): interface.operational.reset_counters() if __name__ == '__main__': parser = argparse.ArgumentParser(add_help=False, description='Show interface information') parser.add_argument('--intf', action="store", type=str, default='', help='only show the specified interface(s)') parser.add_argument('--intf-type', action="store", type=str, default='', help='only show the specified interface type') parser.add_argument('--action', action="store", type=str, default='show', help='action to perform') parser.add_argument('--vif', action='store_true', default=False, help="only show vif interfaces") parser.add_argument('--vrrp', action='store_true', default=False, help="only show vrrp interfaces") parser.add_argument('--help', action='store_true', default=False, help="show help") args = parser.parse_args() def missing(*args): print('Invalid action [{args.action}]') usage() actions.get(args.action, missing)( [_ for _ in args.intf.split(' ') if _], [_ for _ in args.intf_type.split(' ') if _], args.vif, args.vrrp )