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Diffstat (limited to 'src/op_mode/interfaces.py')
| -rwxr-xr-x | src/op_mode/interfaces.py | 412 |
1 files changed, 412 insertions, 0 deletions
diff --git a/src/op_mode/interfaces.py b/src/op_mode/interfaces.py new file mode 100755 index 000000000..678c74980 --- /dev/null +++ b/src/op_mode/interfaces.py @@ -0,0 +1,412 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2022 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 os +import re +import sys +import glob +import json +import typing +from datetime import datetime +from tabulate import tabulate + +import vyos.opmode +from vyos.ifconfig import Section +from vyos.ifconfig import Interface +from vyos.ifconfig import VRRP +from vyos.util import cmd, rc_cmd, call + +def catch_broken_pipe(func): + def wrapped(*args, **kwargs): + try: + func(*args, **kwargs) + except (BrokenPipeError, KeyboardInterrupt): + # Flush output to /dev/null and bail out. + os.dup2(os.open(os.devnull, os.O_WRONLY), sys.stdout.fileno()) + return wrapped + +# The original implementation of filtered_interfaces has signature: +# (ifnames: list, iftypes: typing.Union[str, list], vif: bool, vrrp: bool) -> intf: Interface: +# Arg types allowed in CLI (ifnames: str, iftypes: str) were manually +# re-typed from argparse args. +# We include the function in a general form, however op-mode standard +# functions will restrict to the CLI-allowed arg types, wrapped in Optional. +def filtered_interfaces(ifnames: typing.Union[str, list], + iftypes: typing.Union[str, list], + vif: bool, vrrp: bool) -> Interface: + """ + get all interfaces from the OS and return them; ifnames can be used to + filter which interfaces should be considered + + ifnames: a list of interface names to consider, empty do not filter + + return an instance of the Interface class + """ + if isinstance(ifnames, str): + ifnames = [ifnames] if ifnames else [] + if isinstance(iftypes, list): + for iftype in iftypes: + yield from filtered_interfaces(ifnames, iftype, vif, vrrp) + + for ifname in Section.interfaces(iftypes): + # Bail out early if interface name not part of our search list + if ifnames and ifname not in ifnames: + continue + + # As we are only "reading" from the interface - we must use the + # generic base class which exposes all the data via a common API + interface = Interface(ifname, create=False, debug=False) + + # VLAN interfaces have a '.' in their name by convention + if vif and not '.' in ifname: + continue + + if vrrp: + vrrp_interfaces = VRRP.active_interfaces() + if 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') + + returned = cmd('stty size') if not no_tty else '' + returned = returned.split() + if len(returned) == 2: + _, columns = tuple(int(_) for _ in returned) + else: + _, 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_counter_val(prev, now): + """ + attempt to correct a counter if it wrapped, copied from perl + + prev: previous counter + now: the current counter + """ + # This function has to deal with both 32 and 64 bit counters + if prev == 0: + return now + + # device is using 64 bit values assume they never wrap + value = now - prev + if (now >> 32) != 0: + return value + + # The counter has rolled. If the counter has rolled + # multiple times since the prev value, then this math + # is meaningless. + if value < 0: + value = (4294967296 - prev) + now + + return value + +def _pppoe(ifname): + out = cmd('ps -C pppd -f') + if ifname in out: + return 'C' + if ifname in [_.split('/')[-1] for _ in glob.glob('/etc/ppp/peers/pppoe*')]: + return 'D' + return '' + +def _find_intf_by_ifname(intf_l: list, name: str): + for d in intf_l: + if d['ifname'] == name: + return d + return {} + +# lifted out of operational.py to separate formatting from data +def _format_stats(stats, indent=4): + stat_names = { + 'rx': ['bytes', 'packets', 'errors', 'dropped', 'overrun', 'mcast'], + 'tx': ['bytes', 'packets', 'errors', 'dropped', 'carrier', 'collisions'], + } + + stats_dir = { + 'rx': ['rx_bytes', 'rx_packets', 'rx_errors', 'rx_dropped', 'rx_over_errors', 'multicast'], + 'tx': ['tx_bytes', 'tx_packets', 'tx_errors', 'tx_dropped', 'tx_carrier_errors', 'collisions'], + } + tabs = [] + for rtx in list(stats_dir): + tabs.append([f'{rtx.upper()}:', ] + stat_names[rtx]) + tabs.append(['', ] + [stats[_] for _ in stats_dir[rtx]]) + + s = tabulate( + tabs, + stralign="right", + numalign="right", + tablefmt="plain" + ) + + p = ' '*indent + return f'{p}' + s.replace('\n', f'\n{p}') + +def _get_raw_data(ifname: typing.Optional[str], + iftype: typing.Optional[str], + vif: bool, vrrp: bool) -> list: + if ifname is None: + ifname = '' + if iftype is None: + iftype = '' + ret =[] + for interface in filtered_interfaces(ifname, iftype, vif, vrrp): + res_intf = {} + cache = interface.operational.load_counters() + + out = cmd(f'ip -json addr show {interface.ifname}') + res_intf_l = json.loads(out) + res_intf = res_intf_l[0] + + if res_intf['link_type'] == 'tunnel6': + # Note that 'ip -6 tun show {interface.ifname}' is not json + # aware, so find in list + out = cmd('ip -json -6 tun show') + tunnel = json.loads(out) + res_intf['tunnel6'] = _find_intf_by_ifname(tunnel, + interface.ifname) + if 'ip6_tnl_f_use_orig_tclass' in res_intf['tunnel6']: + res_intf['tunnel6']['tclass'] = 'inherit' + del res_intf['tunnel6']['ip6_tnl_f_use_orig_tclass'] + + res_intf['counters_last_clear'] = int(cache.get('timestamp', 0)) + + res_intf['description'] = interface.get_alias() + + res_intf['stats'] = interface.operational.get_stats() + + ret.append(res_intf) + + # find pppoe interfaces that are in a transitional/dead state + if ifname.startswith('pppoe') and not _find_intf_by_ifname(ret, ifname): + pppoe_intf = {} + pppoe_intf['unhandled'] = None + pppoe_intf['ifname'] = ifname + pppoe_intf['state'] = _pppoe(ifname) + ret.append(pppoe_intf) + + return ret + +def _get_summary_data(ifname: typing.Optional[str], + iftype: typing.Optional[str], + vif: bool, vrrp: bool) -> list: + if ifname is None: + ifname = '' + if iftype is None: + iftype = '' + ret = [] + for interface in filtered_interfaces(ifname, iftype, vif, vrrp): + res_intf = {} + + res_intf['ifname'] = interface.ifname + res_intf['oper_state'] = interface.operational.get_state() + res_intf['admin_state'] = interface.get_admin_state() + res_intf['addr'] = [_ for _ in interface.get_addr() if not _.startswith('fe80::')] + res_intf['description'] = interface.get_alias() + + ret.append(res_intf) + + # find pppoe interfaces that are in a transitional/dead state + if ifname.startswith('pppoe') and not _find_intf_by_ifname(ret, ifname): + pppoe_intf = {} + pppoe_intf['unhandled'] = None + pppoe_intf['ifname'] = ifname + pppoe_intf['state'] = _pppoe(ifname) + ret.append(pppoe_intf) + + return ret + +def _get_counter_data(ifname: typing.Optional[str], + iftype: typing.Optional[str], + vif: bool, vrrp: bool) -> list: + if ifname is None: + ifname = '' + if iftype is None: + iftype = '' + ret = [] + for interface in filtered_interfaces(ifname, iftype, vif, vrrp): + res_intf = {} + + oper = interface.operational.get_state() + + if oper not in ('up','unknown'): + continue + + stats = interface.operational.get_stats() + cache = interface.operational.load_counters() + res_intf['ifname'] = interface.ifname + res_intf['rx_packets'] = _get_counter_val(cache['rx_packets'], stats['rx_packets']) + res_intf['rx_bytes'] = _get_counter_val(cache['rx_bytes'], stats['rx_bytes']) + res_intf['tx_packets'] = _get_counter_val(cache['tx_packets'], stats['tx_packets']) + res_intf['tx_bytes'] = _get_counter_val(cache['tx_bytes'], stats['tx_bytes']) + + ret.append(res_intf) + + return ret + +@catch_broken_pipe +def _format_show_data(data: list): + unhandled = [] + for intf in data: + if 'unhandled' in intf: + unhandled.append(intf) + continue + # instead of reformatting data, call non-json output: + rc, out = rc_cmd(f"ip addr show {intf['ifname']}") + if rc != 0: + continue + out = re.sub('^\d+:\s+','',out) + # add additional data already collected + if 'tunnel6' in intf: + t6_d = intf['tunnel6'] + t6_str = 'encaplimit %s hoplimit %s tclass %s flowlabel %s (flowinfo %s)' % ( + t6_d.get('encap_limit', ''), t6_d.get('hoplimit', ''), + t6_d.get('tclass', ''), t6_d.get('flowlabel', ''), + t6_d.get('flowinfo', '')) + out = re.sub('(\n\s+)(link/tunnel6)', f'\g<1>{t6_str}\g<1>\g<2>', out) + print(out) + ts = intf.get('counters_last_clear', 0) + if ts: + when = datetime.fromtimestamp(ts).strftime("%a %b %d %R:%S %Z %Y") + print(f' Last clear: {when}') + description = intf.get('description', '') + if description: + print(f' Description: {description}') + + stats = intf.get('stats', {}) + if stats: + print() + print(_format_stats(stats)) + + for intf in unhandled: + string = { + 'C': 'Coming up', + 'D': 'Link down' + }[intf['state']] + print(f"{intf['ifname']}: {string}") + + return 0 + +@catch_broken_pipe +def _format_show_summary(data): + 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 % ("---------", "----------", "---", "-----------")) + + unhandled = [] + for intf in data: + if 'unhandled' in intf: + unhandled.append(intf) + continue + ifname = [intf['ifname'],] + oper = ['u',] if intf['oper_state'] in ('up', 'unknown') else ['D',] + admin = ['u',] if intf['admin_state'] in ('up', 'unknown') else ['A',] + addrs = intf['addr'] or ['-',] + descs = list(_split_text(intf['description'], 0)) + + while ifname or oper or admin or addrs or descs: + i = ifname.pop(0) if ifname 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 intf in unhandled: + string = { + 'C': 'u/D', + 'D': 'A/D' + }[intf['state']] + print(format1 % (ifname, '', string, '')) + + return 0 + +@catch_broken_pipe +def _format_show_counters(data: list): + formatting = '%-12s %10s %10s %10s %10s' + print(formatting % ('Interface', 'Rx Packets', 'Rx Bytes', 'Tx Packets', 'Tx Bytes')) + + for intf in data: + print(formatting % ( + intf['ifname'], + intf['rx_packets'], + intf['rx_bytes'], + intf['tx_packets'], + intf['tx_bytes'] + )) + + return 0 + +def show(raw: bool, intf_name: typing.Optional[str], + intf_type: typing.Optional[str], + vif: bool, vrrp: bool): + data = _get_raw_data(intf_name, intf_type, vif, vrrp) + if raw: + return data + return _format_show_data(data) + +def show_summary(raw: bool, intf_name: typing.Optional[str], + intf_type: typing.Optional[str], + vif: bool, vrrp: bool): + data = _get_summary_data(intf_name, intf_type, vif, vrrp) + if raw: + return data + return _format_show_summary(data) + +def show_counters(raw: bool, intf_name: typing.Optional[str], + intf_type: typing.Optional[str], + vif: bool, vrrp: bool): + data = _get_counter_data(intf_name, intf_type, vif, vrrp) + if raw: + return data + return _format_show_counters(data) + +if __name__ == '__main__': + try: + res = vyos.opmode.run(sys.modules[__name__]) + if res: + print(res) + except (ValueError, vyos.opmode.Error) as e: + print(e) + sys.exit(1) |