8jXdZddlmZddlmZmZddlmZmZm Z e Z GddZ dS) aMulticast DNS Service Discovery for Python, v0.14-wmcbrine Copyright 2003 Paul Scott-Murphy, 2014 William McBrine This module provides a framework for the use of DNS Service Discovery using IP multicast. 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, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ) annotations) DNSQuestion DNSRecord)_DUPLICATE_QUESTION_INTERVAL$_MAX_KNOWN_ANSWERS_PER_HISTORY_ENTRY_MAX_QUESTION_HISTORY_ENTRIEScBeZdZdZddZdd Zdd ZddZddZddZ dS)QuestionHistoryz%Remember questions and known answers.returnNoneci|_dS)zInit a new QuestionHistory.N)_historyselfs G/home/user/adhan/venv/lib/python3.11/site-packages/zeroconf/_history.py__init__zQuestionHistory.__init__)s IK questionrnow_float known_answersset[DNSRecord]ct|tkrdS||jvr2t|jtkr||||f|j|<dS)z'Remember a question with known answers.N)lenrrr _evict_to_make_room)rrrrs radd_question_at_timez$QuestionHistory.add_question_at_time-sj }   D D D F 4= ( (S-?-?C`-`-`  $ $S ) ) )#& "6 hrboolct|j|}|sdS|\}}||z tkrdS||z S)a/Check to see if a question should be suppressed. https://datatracker.ietf.org/doc/html/rfc6762#section-7.3 When multiple queriers on the network are querying for the same resource records, there is no need for them to all be repeatedly asking the same question. F)rgetr)rrrrprevious_questionthanprevious_known_answerss r suppresseszQuestionHistory.suppresses<sW!M--h77  5'8$$ :4 4 45*M999rcg}|jD]-\}}|\}}||z tkr||.|D] }|j|= dS)z$Expire the history of old questions.N)ritemsrappend)rrremovesrnow_known_answersr"_s r async_expirezQuestionHistory.async_expirePs|%'+/=+>+>+@+@ ) ) 'H''GD!Tz888x((( ( (H h'' ( (rc8|jdS)zClear the history.N)rclearrs rr-zQuestionHistory.clearZs rc~tt|j}|j|}|d}||z tkr||t |jt krF|jtt|j=t |jt kDdSdS)uTDrop expired or oldest entries when the history is at cap. Peeks at the oldest insertion (dict is ordered) — only runs the full O(n) async_expire sweep if it could actually reclaim something, else a sustained flood at cap turns each insert into a wasted scan. Falls back to oldest-first eviction. rN)nextiterrrr+rr )rroldest oldest_entry oldest_thans rrz#QuestionHistory._evict_to_make_room^sd4=))**}V, "1o  ; ; ;   c " " "$-  $AAA d4 #6#6778$-  $AAAAAAArN)r r )rrrrrrr r )rrrrrrr r)rrr r ) __name__ __module__ __qualname____doc__rrr$r+r-rrrr r &s//LLLL 7 7 7 7::::(((((999999rr N) r7 __future__r_dnsrrconstrrr floatrr r8rrr=s,#"""""(((((((( F9F9F9F9F9F9F9F9F9F9r