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grammar.js
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grammar.js
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module.exports = grammar({
name: 'mud',
rules: {
source: $ => json_object(comma_separated(choice($.ietf_mud, $.ietf_acls, $.json_pair_fallback))),
ietf_mud: $ => json_pair('"ietf-mud:mud"'
,json_object(comma_separated(choice($.mud_version
,$.mud_url
,$.last_update
,$.cache_validity
,$.is_supported
,$.systeminfo
,$.from_device_policy
,$.to_device_policy
,$.json_pair_fallback)))),
ietf_acls : $ => json_pair('"ietf-access-control-list:acls"'
,$.acl),
acl: $ => json_object(json_pair('"acl"', json_list($.acl_object))),
acl_object: $ => json_object(seq($.acl_name_def,','
,json_pair('"type"', $.string),','
,json_pair('"aces"', $.ace))),
ace: $ => json_object(json_pair('"ace"'
,json_list($.ace_object))),
ace_object: $ => json_object(seq(json_pair('"name"', $.string) ,','
,json_pair('"matches"', $.matches),','
,json_pair('"actions"', $.actions))),
matches: $ => $.matches_object,
actions: $ => choice($.forwarding_action, $.json_object_fallback),
acl_name_def: $ => json_pair('"name"', field('name', $.string)),
policy_acl_name: $ => json_pair('"name"', field('name', $.string)),
matches_object: $ => json_object(comma_separated(choice($.eth_matches
,$.ipv4_matches
,$.ipv6_matches
,$.tcp_matches
,$.udp_matches
,$.icmp_matches
,$.mud_matches_augment
,$.json_pair_fallback))),
mud_matches_augment: $ => json_pair('"ietf-mud:mud"'
,json_object(comma_separated(choice($.controller
,$.my_controller
,$.manufacturer
,$.same_manufacturer
,$.local_networks
,$.model
,$.json_pair_fallback)))),
eth_matches: $ => json_pair('"eth"', json_object(comma_separated($.json_pair_fallback))),
ipv4_matches: $ => json_pair('"ipv4"'
,json_object(comma_separated(choice($.ip_header_proto
,$.ietf_acldns
,$.json_pair_fallback)))), // TODO
ipv6_matches: $ => json_pair('"ipv6"'
,json_object(comma_separated(choice($.ip_header_proto
,$.ietf_acldns
,$.json_pair_fallback)))), // TODO
tcp_matches: $ => json_pair('"tcp"'
,json_object(comma_separated(choice($.source_port
,$.destination_port
,$.direction_initiated
,$.json_pair_fallback)))), // TODO
udp_matches: $ => json_pair('"udp"'
,json_object(comma_separated(choice($.source_port
,$.destination_port
,$.direction_initiated
,$.json_pair_fallback)))), // TODO
icmp_matches: $ => json_pair('"icmp"'
,json_object(comma_separated(choice($.type
,$.code
,$.rest_of_header
,$.json_pair_fallback)))),
controller: $ => json_pair('"controller"', field('uri', $.string)),
my_controller: $ => json_pair('"my-controller"', $.null_valued),
manufacturer: $ => json_pair('"manufacturer"', field('authority', $.string)),
same_manufacturer: $ => json_pair('"same-manufacturer"', $.null_valued),
local_networks: $ => json_pair('"local-networks"', $.null_valued),
model: $ => json_pair('"model"', field('uri', $.string)),
ip_header_proto: $ => json_pair('"protocol"', $.number),
ietf_acldns: $ => json_pair(seq('"ietf-acldns:',choice('src-dnsname','dst-dnsname'),'"')
,$.string),
source_port: $ => json_pair('"source-port"', $.range_or_operator),
destination_port: $ => json_pair('"destination-port"', $.range_or_operator),
range_or_operator: $ => choice($.port_range, $.port_operator),
port_range: $ => json_object(comma_separated1(choice(json_pair('"lower-port"', $.number)
,json_pair('"upper-port"', $.number)))),
port_operator: $ => json_object(comma_separated1(choice(json_pair('"operator"', $.string)
,json_pair('"port"', $.number)))),
direction_initiated: $ => json_pair('"ietf-mud:direction-initiated"'
,choice('"to-device"', '"from-device"')),
type: $ => json_pair('"type"', $.uint8),
code: $ => json_pair('"code"', $.uint8),
rest_of_header: $ => json_pair('"rest-of-header"', $.binary),
// TODO: for the purposes of type-checking in muddles these aliases should
// be used consistently per their use in RFC8519,RFC8520.
uint8: $ => $.number,
binary: $ => $.string,
forwarding_action: $ => json_object(json_pair('"forwarding"', $.action)),
action: $ => choice('"accept"', '"drop"', '"reject"'),
mud_version: $ => json_pair('"mud-version"' ,field('version' ,$.number)),
mud_url: $ => json_pair('"mud-url"' ,field('url' ,$.string)),
last_update: $ => json_pair('"last-update"' ,field('timestamp',$.string)),
cache_validity: $ => json_pair('"cache-validity"' ,field('hours' ,$.number)),
is_supported: $ => json_pair('"is-supported"' ,field('supported',$.bool )),
systeminfo: $ => json_pair('"systeminfo"' ,field('info' ,$.string)),
from_device_policy: $ => json_pair('"from-device-policy"',field('policy' ,$.policy)),
to_device_policy: $ => json_pair('"to-device-policy"' ,field('policy' ,$.policy)),
policy: $ => json_object(json_pair('"access-lists"', $.access_list)),
access_list: $ => json_object(json_pair('"access-list"', json_list(json_object($.policy_acl_name)))),
string: $ => seq('"', $.string_quoted_content, '"'),
string_quoted_content: $ => repeat1(choice(token.immediate(/[^\\"\n]+/)
,$._escape_sequence)),
_escape_sequence: $ => token.immediate(seq('\\'
,/(\"|\\|\/|b|f|n|r|t|u)/)),
number: $ => /\d+/, // TODO: hexadecimal/other notations?
bool: $ => choice('true', 'false'),
null_valued: $ => seq('[', 'null', ']'),
json_value_fallback: $ => choice($.json_object_fallback
,$.json_array_fallback
,$.number
,$.string
,'true'
,'false'
,'null'),
json_object_fallback: $ => seq('{', comma_separated($.json_pair_fallback), '}'),
json_array_fallback: $ => seq('[', comma_separated($.json_value_fallback), ']'),
json_pair_fallback: $ => seq(choice($.string, $.number)
,':'
,$.json_value_fallback),
}
});
function json_pair(k, v) {
return seq(k, ':', v)
}
function json_object(o) {
return seq('{', o, '}')
}
function json_list(e) {
return seq('[', optional(comma_separated(e)), ']')
}
function comma_separated1(e) {
return seq(e, repeat(seq(',', e)))
}
function comma_separated(e) {
return optional(comma_separated1(e))
}