<s> import inspect , re , subprocess , logging , json <EOL> from collections import namedtuple <EOL> from threading import RLock <EOL> log = logging . getLogger ( '<STR_LIT>' . format ( __name__ ) ) <EOL> log . addHandler ( logging . NullHandler ( ) ) <EOL> IPTABLES_HEADERS = [ '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT:target>' , '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT:source>' , '<STR_LIT>' ] <EOL> RULE_ATTRS = [ '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT:target>' , '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT:source>' , '<STR_LIT>' , '<STR_LIT>' ] <EOL> RULE_TARGETS = [ '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT>' ] <EOL> RULE_CHAINS = [ '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT>' ] <EOL> RuleProto = namedtuple ( '<STR_LIT>' , RULE_ATTRS ) <EOL> class Rule ( RuleProto ) : <EOL> """<STR_LIT>""" <EOL> def __new__ ( _cls , * args , ** kwargs ) : <EOL> """<STR_LIT>""" <EOL> if args : <EOL> if len ( args ) != <NUM_LIT:1> : <EOL> raise ValueError ( '<STR_LIT>' ) <EOL> props = args [ <NUM_LIT:0> ] <EOL> if isinstance ( props , list ) : <EOL> return RuleProto . __new__ ( _cls , * props ) <EOL> elif isinstance ( props , dict ) : <EOL> d = { '<STR_LIT>' : None , '<STR_LIT>' : None , '<STR_LIT>' : None , '<STR_LIT>' : None , '<STR_LIT:target>' : None , '<STR_LIT>' : '<STR_LIT:all>' , '<STR_LIT>' : '<STR_LIT>' , '<STR_LIT>' : '<STR_LIT:*>' , '<STR_LIT>' : '<STR_LIT:*>' , '<STR_LIT:source>' : '<STR_LIT>' , '<STR_LIT>' : '<STR_LIT>' , '<STR_LIT>' : '<STR_LIT>' } <EOL> d . update ( props ) <EOL> return RuleProto . __new__ ( _cls , ** d ) <EOL> else : <EOL> raise ValueError ( '<STR_LIT>' ) <EOL> elif kwargs : <EOL> return RuleProto . __new__ ( _cls , ** kwargs ) <EOL> else : <EOL> return RuleProto . __new__ ( _cls , [ ] ) <EOL> def __eq__ ( self , other ) : <EOL> """<STR_LIT>""" <EOL> if isinstance ( other , self . __class__ ) : <EOL> return self . chain == other . chain and self . target == other . target and self . prot == other . prot and self . opt == other . opt and self . inp == other . inp and self . out == other . out and self . source == other . source and self . destination == other . destination <EOL> else : <EOL> return False <EOL> def __ne__ ( self , other ) : <EOL> return not self . __eq__ ( other ) <EOL> class Iptables : <EOL> lock = RLock ( ) <EOL> ipt_path = '<STR_LIT>' <EOL> def __init__ ( self , rules ) : <EOL> if inspect . stack ( ) [ <NUM_LIT:1> ] [ <NUM_LIT:3> ] == '<STR_LIT>' : <EOL> self . rules = rules <EOL> else : <EOL> raise Exception ( "<STR_LIT>" ) <EOL> @ staticmethod <EOL> def load ( ) : <EOL> rules = Iptables . _iptables_list ( ) <EOL> inst = Iptables ( rules ) <EOL> return inst <EOL> @ staticmethod <EOL> def verify_install ( ) : <EOL> """<STR_LIT>""" <EOL> try : <EOL> Iptables . exe ( [ '<STR_LIT>' ] ) <EOL> except OSError , e : <EOL> raise Exception ( "<STR_LIT>" . format ( Iptables . ipt_path ) ) <EOL> @ staticmethod <EOL> def verify_permission ( ) : <EOL> """<STR_LIT>""" <EOL> try : <EOL> Iptables . exe ( [ '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT>' ] ) <EOL> except subprocess . CalledProcessError , e : <EOL> raise Exception ( "<STR_LIT>" . format ( Iptables . ipt_path ) ) <EOL> @ staticmethod <EOL> def verify_original ( ) : <EOL> pass <EOL> @ staticmethod <EOL> def _iptables_list ( ) : <EOL> """<STR_LIT>""" <EOL> rules = [ ] <EOL> out = Iptables . exe ( [ '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT>' , '<STR_LIT>' ] ) <EOL> chain = None <EOL> header = None <EOL> for line in out . split ( '<STR_LIT:\n>' ) : <EOL> line = line . strip ( ) <EOL> if not line : <EOL> chain = None <EOL> continue <EOL> m = re . match ( r"<STR_LIT>" , line ) <EOL> if m and m . group ( <NUM_LIT:1> ) in RULE_CHAINS : <EOL> chain = m . group ( <NUM_LIT:1> ) <EOL> continue <EOL> if "<STR_LIT:source>" in line and "<STR_LIT>" in line : <EOL> assert line . split ( ) == IPTABLES_HEADERS <EOL> continue <EOL> if chain : <EOL> columns = line . split ( ) <EOL> if columns and columns [ <NUM_LIT:0> ] . isdigit ( ) : <EOL> extra = "<STR_LIT:U+0020>" . join ( columns [ <NUM_LIT:10> : ] ) <EOL> columns = columns [ : <NUM_LIT:10> ] <EOL> columns . append ( extra ) <EOL> columns . insert ( <NUM_LIT:0> , chain ) <EOL> rule = Rule ( columns ) <EOL> rules . append ( rule ) <EOL> return rules <EOL> @ staticmethod <EOL> def rule_to_command ( r ) : <EOL> """<STR_LIT>""" <EOL> assert r . chain == '<STR_LIT>' or r . chain == '<STR_LIT>' or r . chain == '<STR_LIT>' <EOL> lcmd = [ ] <EOL> lcmd . append ( r . chain ) <EOL> if r . prot != '<STR_LIT:all>' : <EOL> lcmd . append ( '<STR_LIT>' ) <EOL> lcmd . append ( r . prot ) <EOL> if r . extra : <EOL> es = r . extra . split ( ) <EOL> for e in es : <EOL> if e [ : <NUM_LIT:4> ] == '<STR_LIT>' : <EOL> dport = e . split ( '<STR_LIT::>' ) [ <NUM_LIT:1> ] <EOL> lcmd . append ( '<STR_LIT>' ) <EOL> lcmd . append ( dport ) <EOL> if e [ : <NUM_LIT:4> ] == '<STR_LIT>' : <EOL> sport = e . split ( '<STR_LIT::>' ) [ <NUM_LIT:1> ] <EOL> lcmd . append ( '<STR_LIT>' ) <EOL> lcmd . append ( sport ) <EOL> if r . destination != '<STR_LIT>' : <EOL> lcmd . append ( '<STR_LIT>' ) <EOL> lcmd . append ( r . destination ) <EOL> if r . source != '<STR_LIT>' : <EOL> lcmd . append ( '<STR_LIT>' ) <EOL> lcmd . append ( r . source ) <EOL> lcmd . append ( '<STR_LIT>' ) <EOL> lcmd . append ( r . target ) <EOL> return lcmd <EOL> @ staticmethod <EOL> def exe_rule ( modify , rule ) : <EOL> assert modify == '<STR_LIT:I>' or modify == '<STR_LIT:D>' <EOL> lcmd = Iptables . rule_to_command ( rule ) <EOL> return Iptables . exe ( [ '<STR_LIT:->' + modify ] + lcmd ) <EOL> @ staticmethod <EOL> def exe ( lcmd ) : <EOL> cmd = [ Iptables . ipt_path ] + lcmd <EOL> try : <EOL> log . debug ( '<STR_LIT>' . format ( '<STR_LIT:U+0020>' . join ( cmd ) ) ) <EOL> with Iptables . lock : <EOL> out = subprocess . check_output ( cmd , stderr = subprocess . STDOUT ) <EOL> if out : <EOL> log . debug ( "<STR_LIT>" . format ( out ) ) <EOL> return out <EOL> except subprocess . CalledProcessError , e : <EOL> log . error ( "<STR_LIT>" . format ( e . returncode , e . cmd , e . output ) ) <EOL> raise e <EOL> @ staticmethod <EOL> def read_simple_rules ( chain = None ) : <EOL> assert chain is None or chain in RULE_CHAINS <EOL> rules = [ ] <EOL> ipt = Iptables . load ( ) <EOL> if chain == '<STR_LIT>' or chain is None : <EOL> input_rules = ipt . find ( { '<STR_LIT:target>' : RULE_TARGETS , '<STR_LIT>' : [ '<STR_LIT>' ] , '<STR_LIT>' : [ '<STR_LIT>' ] , '<STR_LIT>' : [ '<STR_LIT:*>' ] , '<STR_LIT>' : [ '<STR_LIT:all>' ] , '<STR_LIT>' : [ '<STR_LIT>' ] } ) <EOL> rules . extend ( input_rules ) <EOL> if chain == '<STR_LIT>' or chain is None : <EOL> output_rules = ipt . find ( { '<STR_LIT:target>' : RULE_TARGETS , '<STR_LIT>' : [ '<STR_LIT>' ] , '<STR_LIT:source>' : [ '<STR_LIT>' ] , '<STR_LIT>' : [ '<STR_LIT:*>' ] , '<STR_LIT>' : [ '<STR_LIT:all>' ] , '<STR_LIT>' : [ '<STR_LIT>' ] } ) <EOL> rules . extend ( output_rules ) <EOL> if chain == '<STR_LIT>' or chain is None : <EOL> forward_rules = ipt . find ( { '<STR_LIT:target>' : RULE_TARGETS , '<STR_LIT>' : [ '<STR_LIT>' ] , '<STR_LIT>' : [ '<STR_LIT:all>' ] , '<STR_LIT>' : [ '<STR_LIT>' ] } ) <EOL> rules . extend ( forward_rules ) <EOL> return rules <EOL> def find ( self , query ) : <EOL> """<STR_LIT>""" <EOL> ret = [ ] <EOL> for r in self . rules : <EOL> matched_all = True <EOL> for param , vals in query . items ( ) : <EOL> rule_val = getattr ( r , param ) <EOL> if rule_val not in vals : <EOL> matched_all = False <EOL> break <EOL> if matched_all : <EOL> ret . append ( r ) <EOL> return ret </s>
