cisco.grammar
author "Tomas Zeman <tzeman@volny.cz>"
Sun, 15 Nov 2009 22:52:18 +0100
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child 12 0b509f26f4d3
permissions -rw-r--r--
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# Grammar for Cisco devices
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# Configuration is expected to be preprocessed via following command:
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# perl -ne '/(^\s*)(\S.*)$/; print length($1)." $2\n"'
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#<autotree>
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{ # perl code follows
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$::res = {};
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# Returns pointer to context hasref as specified by ctx stack.
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# @param ctx_path array of ctx stack.
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sub ctx {
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	my @ctx_path = @_;
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	my $ptr = $::res;
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	foreach my $part (@ctx_path) {
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		$ptr->{$part} = {} unless exists ($ptr->{$part});
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		$ptr = $ptr->{$part};
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	}
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	return $ptr;
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}
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} # end of perl code
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file:		<skip: qr/[^\S\n]*/>	# Ignore non-newline whitespace
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		line(s) eofile
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line: 		s_controller
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		| s_interface
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		| indent comment
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		| indent cmdline 
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		| indent emptyline
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		| <error>
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emptyline:	eol
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comment: 	/!.*/ eol
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cmdline:	l_hostname eol
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		| l_hash eol
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		| word(s) eol
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word:		/[0-9a-zA-Z:\/_\#\"\.,+<>()&{}-]+/
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		{ $item[1] }
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type:		/\w+/
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		{ $item[1] }
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num:		/\d+/
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		{ $item[1] }
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indent:		/\d+/
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		{ $item[1] }
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range:		/\d+/"-"/\d+/
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		{ { from => $item[1], to => $item[3] } } 
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keyword:	/[\w-]+/
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		{ $item[1] }
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identifier:	/[0-9a-zA-Z:_-]+/
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		{ $item[1] }
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quoted_text:	<perl_quotelike>
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		{ $item[1][2] }
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		| /[0-9a-zA-Z:\/_\#\"\.,-]+/
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		{ $item[1] }
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value:		/[0-9a-zA-Z:\/_\#\"\.,-]+/
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		{ $item[1] }
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eofile:		/^\Z/
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eol:		/\n/
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rest_of_line:	word(s)
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		| eol
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# section
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section:	cmdline(s) "!"
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		{ print "section\n"; }
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l_section:	/[1-9]/ word(s) eol
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		| /[1-9]/ "!" eol
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		| /[1-9]/ eol
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		| <error>
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# Lines w/ hash (passwd, secret etc)
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l_hash:		word(s) /\S+/ word(s)
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		| word(s) /\S+/
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# Hostname
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l_hostname:	"hostname" identifier
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		{ $::res->{hostname} = $item{identifier} }
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# Description
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l_description:	"description" /[^\n]+/
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		{ $arg{ctx}->{description} = $item[2] }
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# controller section
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controller_num:	/\d+\/\d+/
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		{ $item[1] }
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s_controller:	"0" "controller" type controller_num eol s_controller_l[ctx => ctx('controller', $item{controller_num}) ](s) "0" "!" eol
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		{ $::res->{controller}->{$item{controller_num}}->{type} = $item{type} }
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s_controller_l:	"1" s_controller_content[ctx => $arg{ctx}] eol
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		| l_section
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s_controller_content: l_description[ctx => $arg{ctx}]
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		| "channel-group" num "timeslots" range
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		{ $arg{ctx}->{"channel-group"}->{$item{num}}->{ts} = $item{range} }
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		| "channel-group" num "unframed"
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		{ $arg{ctx}->{"channel-group"}->{$item{num}}->{unframed} = 1 }
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		| "framing" keyword
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		{ $arg{ctx}->{framing} = $item{keyword} }
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# Vlan range
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vlan_s_range:	/\d+/"-"/\d+/
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		{
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		for (my $i = $item[1]; $i <= $item[3]; $i++) {
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			$arg{ctx}->{$arg{key}}->{$i} = 1; }
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		}
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		| /\d+/
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		{ $arg{ctx}->{$arg{key}}->{$item[1]} = 1 }
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vlan_range: 	vlan_s_range","vlan_range
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		| vlan_s_range
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# interface section
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iface_name:	/\w+\d+[0-9\/\.:]*/
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		{ $item[1] }
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s_interface:	"0" "interface" iface_name /\S*/ eol s_interface_l[ctx => ctx("interface", $item{iface_name}) ](s) "0" "!" eol
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		{
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		$::res->{interface}->{$item{iface_name}}->{type} = $item[4]
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			if length($item[4]) > 0
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		}
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ip:		/\d+\.\d+\.\d+\.\d+/
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		{ $item[1] }
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s_interface_l:  "1" s_interface_content[ctx => $arg{ctx}] eol
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		| l_section
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s_interface_content: l_description[ctx => $arg{ctx}]
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		| /(no)?/ "shutdown"
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		{ $arg{ctx}->{shutdown} = ($item[1] eq 'no') ? 0 : 1 }
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		| "ip" "address" ip ip
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		{ $arg{ctx}->{ip} = $item[3]; $arg{ctx}->{mask} = $item[3] }
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		| "encapsulation" keyword /\S*/
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		{
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		$arg{ctx}->{encap} = $item[2];
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		$arg{ctx}->{encap_param} = $item[3] if length($item[3]) > 0
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		}
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		| "frame-relay" keyword keyword
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		{ $arg{ctx}->{"frame-relay"} = {type => $item[2], value => $item[3]} }
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		| "bandwidth" num
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		{ $arg{ctx}->{bandwidth} = $item{num} }
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		| "ip" "vrf" "forwarding" word
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		{ $arg{ctx}->{"ip-vrf-fwd"} = $item{word} }
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		| "switchport" "mode" /access|trunk/
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		{ $arg{ctx}->{"switchport-mode"} = $item[3] }
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		| "switchport" "access" "vlan" num
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		{ $arg{ctx}->{vlan} = $item{num} }
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		| "switchport" "trunk" "encapsulation" keyword
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		{ $arg{ctx}->{"trunk-encap"} = $item{keyword} }
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		| "switchport" "trunk" "allowed" "vlan" vlan_range[ctx => $arg{ctx}, key => "vlan"]