# Copyright (C) 2007-2016 by the Free Software Foundation, Inc. # # This file is part of GNU Mailman. # # GNU Mailman is free software: you can redistribute it and/or modify it under # the terms of the GNU General Public License as published by the Free # Software Foundation, either version 3 of the License, or (at your option) # any later version. # # GNU Mailman 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 # GNU Mailman. If not, see . """Membership related rules.""" import re from mailman import public from mailman.core.i18n import _ from mailman.interfaces.action import Action from mailman.interfaces.bans import IBanManager from mailman.interfaces.member import MemberRole from mailman.interfaces.rules import IRule from mailman.interfaces.usermanager import IUserManager from zope.component import getUtility from zope.interface import implementer @public @implementer(IRule) class MemberModeration: """The member moderation rule.""" name = 'member-moderation' description = _('Match messages sent by moderated members.') record = True def check(self, mlist, msg, msgdata): """See `IRule`.""" # The MemberModeration rule misses unconditionally if any of the # senders are banned. ban_manager = IBanManager(mlist) user_manager = getUtility(IUserManager) for sender in msg.senders: if ban_manager.is_banned(sender): return False # For each sender address, try to find a member associated with the # email address. Start by checking the sender email directly. If the # sender email is not a member, try to find the user linked to the # email, and then check to see if *that* user, or any of the addresses # linked to that user is a member. This rule hits of we find a member # and their moderation action is not to defer. for sender in msg.senders: # Is the sender email itself a member? member = mlist.members.get_member(sender) if member is None: # Is the sender email linked to a user? user = user_manager.get_user(sender) if user is not None: # Are any of the emails linked to this user a member? for address in user.addresses: member = mlist.members.get_member(address.email) if member is not None: # We found a member, so we don't need to check any # of the other linked addresses. break if member is None: return False action = (mlist.default_member_action if member.moderation_action is None else member.moderation_action) if action is Action.defer: # The regular moderation rules apply. return False elif action is not None: # We must stringify the moderation action so that it can be # stored in the pending request table. msgdata['moderation_action'] = action.name msgdata['moderation_sender'] = sender msgdata.setdefault('moderation_reasons', []).append( # This will get translated at the point of use. 'The message comes from a moderated member') return True # The sender is not a member so this rule does not match. return False def _record_action(msgdata, action, sender, reason): msgdata['moderation_action'] = action msgdata['moderation_sender'] = sender msgdata.setdefault('moderation_reasons', []).append(reason) @public @implementer(IRule) class NonmemberModeration: """The nonmember moderation rule.""" name = 'nonmember-moderation' description = _('Match messages sent by nonmembers.') record = True def check(self, mlist, msg, msgdata): """See `IRule`.""" ban_manager = IBanManager(mlist) user_manager = getUtility(IUserManager) # The NonmemberModeration rule misses unconditionally if any of the # senders are banned. for sender in msg.senders: if ban_manager.is_banned(sender): return False # Every sender must somehow be a member or nonmember. The sender # email can have one of those roles directly, or a user that the email # is linked to can have one of those roles indirectly, or any address # linked to one of those users can have one of those roles. # # If the sender is not somehow a member or nonmember, make them a # nonmember. We maintain a record of which senders are members, and # then the ones that aren't are made nonmembers. found_linked_membership = set() for sender in msg.senders: member = mlist.members.get_member(sender) if member is None: user = user_manager.get_user(sender) if user is not None: for address in user.addresses: if mlist.members.get_member(address.email) is not None: found_linked_membership.add(sender) else: found_linked_membership.add(sender) # Now we know whether the sender is somehow linked to a member or # not. If not, and the email also isn't already a nonmember, make # them a nonmember. if (mlist.nonmembers.get_member(sender) is None and sender not in found_linked_membership): # noqa address = user_manager.get_address(sender) assert address is not None, ( 'Posting address is not registered: {}'.format(sender)) mlist.subscribe(address, MemberRole.nonmember) # If a membership is found, the MemberModeration rule takes precedence. for sender in msg.senders: if sender in found_linked_membership: return False # Do nonmember moderation check. for sender in msg.senders: nonmember = mlist.nonmembers.get_member(sender) assert nonmember is not None, ( 'Sender not added to the nonmembers: {}'.format(sender)) # Check the '*_these_nonmembers' properties first. XXX These are # legacy attributes from MM2.1; their database type is 'pickle' and # they should eventually get replaced. for action in ('accept', 'hold', 'reject', 'discard'): legacy_attribute_name = '{}_these_nonmembers'.format(action) checklist = getattr(mlist, legacy_attribute_name) for addr in checklist: if ((addr.startswith('^') and re.match(addr, sender)) or addr == sender): # noqa # The reason will get translated at the point of use. reason = 'The sender is in the nonmember {} list' _record_action(msgdata, action, sender, reason.format(action)) return True action = (mlist.default_nonmember_action if nonmember.moderation_action is None else nonmember.moderation_action) if action is Action.defer: # The regular moderation rules apply. return False elif action is not None: # We must stringify the moderation action so that it can be # stored in the pending request table. # # The reason will get translated at the point of use. reason = 'The message is not from a list member' _record_action(msgdata, action.name, sender, reason) return True # The sender must be a member, so this rule does not match. return False