-
Notifications
You must be signed in to change notification settings - Fork 336
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Browse files
Browse the repository at this point in the history
T6456: Convert "monitor traffic" to modern op-mode wrapper
- Loading branch information
Showing
3 changed files
with
175 additions
and
48 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,165 @@ | ||
| #! /usr/bin/env python3 | ||
|
|
||
| # Copyright (C) 2024 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 sys | ||
|
|
||
| from vyos.utils.process import call | ||
|
|
||
| options = { | ||
| 'dump': { | ||
| 'cmd': '{command} -A', | ||
| 'type': 'noarg', | ||
| 'help': 'Print each packet (minus its link level header) in ASCII.' | ||
| }, | ||
| 'hexdump': { | ||
| 'cmd': '{command} -X', | ||
| 'type': 'noarg', | ||
| 'help': 'Print each packet (minus its link level header) in both hex and ASCII.' | ||
| }, | ||
| 'filter': { | ||
| 'cmd': '{command} \'{value}\'', | ||
| 'type': '<pcap-filter>', | ||
| 'help': 'Match traffic for capture and display with a pcap-filter expression.' | ||
| }, | ||
| 'numeric': { | ||
| 'cmd': '{command} -nn', | ||
| 'type': 'noarg', | ||
| 'help': 'Do not attempt to resolve addresses, protocols or services to names.' | ||
| }, | ||
| 'save': { | ||
| 'cmd': '{command} -w {value}', | ||
| 'type': '<file>', | ||
| 'help': 'Write captured raw packets to <file> rather than parsing or printing them out.' | ||
| }, | ||
| 'verbose': { | ||
| 'cmd': '{command} -vvv -ne', | ||
| 'type': 'noarg', | ||
| 'help': 'Parse packets with increased detail output, including link-level headers and extended decoding protocol sanity checks.' | ||
| }, | ||
| } | ||
|
|
||
| tcpdump = 'sudo /usr/bin/tcpdump' | ||
|
|
||
| class List(list): | ||
| def first(self): | ||
| return self.pop(0) if self else '' | ||
|
|
||
| def last(self): | ||
| return self.pop() if self else '' | ||
|
|
||
| def prepend(self, value): | ||
| self.insert(0, value) | ||
|
|
||
|
|
||
| def completion_failure(option: str) -> None: | ||
| """ | ||
| Shows failure message after TAB when option is wrong | ||
| :param option: failure option | ||
| :type str: | ||
| """ | ||
| sys.stderr.write('\n\n Invalid option: {}\n\n'.format(option)) | ||
| sys.stdout.write('<nocomps>') | ||
| sys.exit(1) | ||
|
|
||
|
|
||
| def expansion_failure(option, completions): | ||
| reason = 'Ambiguous' if completions else 'Invalid' | ||
| sys.stderr.write( | ||
| '\n\n {} command: {} [{}]\n\n'.format(reason, ' '.join(sys.argv), | ||
| option)) | ||
| if completions: | ||
| sys.stderr.write(' Possible completions:\n ') | ||
| sys.stderr.write('\n '.join(completions)) | ||
| sys.stderr.write('\n') | ||
| sys.stdout.write('<nocomps>') | ||
| sys.exit(1) | ||
|
|
||
|
|
||
| def complete(prefix): | ||
| return [o for o in options if o.startswith(prefix)] | ||
|
|
||
|
|
||
| def convert(command, args): | ||
| while args: | ||
| shortname = args.first() | ||
| longnames = complete(shortname) | ||
| if len(longnames) != 1: | ||
| expansion_failure(shortname, longnames) | ||
| longname = longnames[0] | ||
| if options[longname]['type'] == 'noarg': | ||
| command = options[longname]['cmd'].format( | ||
| command=command, value='') | ||
| elif not args: | ||
| sys.exit(f'monitor traffic: missing argument for {longname} option') | ||
| else: | ||
| command = options[longname]['cmd'].format( | ||
| command=command, value=args.first()) | ||
| return command | ||
|
|
||
|
|
||
| if __name__ == '__main__': | ||
| args = List(sys.argv[1:]) | ||
| ifname = args.first() | ||
|
|
||
| # Slightly simplified & tweaked version of the code from mtr.py - it may be | ||
| # worthwhile to combine and centralise this in a common module. | ||
| if ifname == '--get-options-nested': | ||
| args.first() # pop monitor | ||
| args.first() # pop traffic | ||
| args.first() # pop interface | ||
| args.first() # pop <ifname> | ||
| usedoptionslist = [] | ||
| while args: | ||
| option = args.first() # pop option | ||
| matched = complete(option) # get option parameters | ||
| usedoptionslist.append(option) # list of used options | ||
| # Select options | ||
| if not args: | ||
| # remove from Possible completions used options | ||
| for o in usedoptionslist: | ||
| if o in matched: | ||
| matched.remove(o) | ||
| if not matched: | ||
| sys.stdout.write('<nocomps>') | ||
| else: | ||
| sys.stdout.write(' '.join(matched)) | ||
| sys.exit(0) | ||
|
|
||
| if len(matched) > 1: | ||
| sys.stdout.write(' '.join(matched)) | ||
| sys.exit(0) | ||
| # If option doesn't have value | ||
| if matched: | ||
| if options[matched[0]]['type'] == 'noarg': | ||
| continue | ||
| else: | ||
| # Unexpected option | ||
| completion_failure(option) | ||
|
|
||
| value = args.first() # pop option's value | ||
| if not args: | ||
| matched = complete(option) | ||
| helplines = options[matched[0]]['type'] | ||
| # Run helpfunction to get list of possible values | ||
| if 'helpfunction' in options[matched[0]]: | ||
| result = options[matched[0]]['helpfunction']() | ||
| if result: | ||
| helplines = '\n' + ' '.join(result) | ||
| sys.stdout.write(helplines) | ||
| sys.exit(0) | ||
|
|
||
| command = convert(tcpdump, args) | ||
| call(f'{command} -i {ifname}') |