mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-26 16:11:07 +00:00
925 lines
30 KiB
JavaScript
925 lines
30 KiB
JavaScript
/*
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* Copyright (c)2019 ZeroTier, Inc.
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file in the project's root directory.
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*
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* Change Date: 2023-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2.0 of the Apache License.
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*/
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/****/
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'use strict';
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// Names for bits in characteristics -- 0==LSB, 63==MSB
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const CHARACTERISTIC_BITS = {
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'inbound': 63,
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'multicast': 62,
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'broadcast': 61,
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'ipauth': 60,
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'macauth': 59,
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'tcp_fin': 0,
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'tcp_syn': 1,
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'tcp_rst': 2,
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'tcp_psh': 3,
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'tcp_ack': 4,
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'tcp_urg': 5,
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'tcp_ece': 6,
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'tcp_cwr': 7,
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'tcp_ns': 8,
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'tcp_rs2': 9,
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'tcp_rs1': 10,
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'tcp_rs0': 11
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};
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// Shorthand names for common ethernet types
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const ETHERTYPES = {
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'ipv4': 0x0800,
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'arp': 0x0806,
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'wol': 0x0842,
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'rarp': 0x8035,
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'ipv6': 0x86dd,
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'atalk': 0x809b,
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'aarp': 0x80f3,
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'ipx_a': 0x8137,
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'ipx_b': 0x8138
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};
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// Shorthand names for common IP protocols
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const IP_PROTOCOLS = {
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'icmp': 0x01,
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'icmp4': 0x01,
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'icmpv4': 0x01,
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'igmp': 0x02,
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'ipip': 0x04,
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'tcp': 0x06,
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'egp': 0x08,
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'igp': 0x09,
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'udp': 0x11,
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'rdp': 0x1b,
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'esp': 0x32,
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'ah': 0x33,
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'icmp6': 0x3a,
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'icmpv6': 0x3a,
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'l2tp': 0x73,
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'sctp': 0x84,
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'udplite': 0x88
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};
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// Keywords that open new blocks that must be terminated by a semicolon
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const OPEN_BLOCK_KEYWORDS = {
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'macro': true,
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'tag': true,
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'cap': true,
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'drop': true,
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'accept': true,
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'tee': true,
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'watch': true,
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'redirect': true,
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'break': true,
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'priority': true
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};
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// Reserved words that can't be used as tag, capability, or rule set names
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const RESERVED_WORDS = {
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'macro': true,
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'tag': true,
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'cap': true,
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'default': true,
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'drop': true,
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'accept': true,
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'tee': true,
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'watch': true,
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'redirect': true,
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'break': true,
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'priority': true,
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'ztsrc': true,
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'ztdest': true,
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'vlan': true,
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'vlanpcp': true,
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'vlandei': true,
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'ethertype': true,
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'macsrc': true,
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'macdest': true,
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'ipsrc': true,
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'ipdest': true,
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'iptos': true,
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'ipprotocol': true,
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'icmp': true,
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'sport': true,
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'dport': true,
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'chr': true,
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'framesize': true,
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'random': true,
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'tand': true,
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'tor': true,
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'txor': true,
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'tdiff': true,
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'teq': true,
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'tseq': true,
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'treq': true,
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'type': true,
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'enum': true,
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'class': true,
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'define': true,
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'import': true,
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'include': true,
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'log': true,
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'not': true,
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'xor': true,
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'or': true,
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'and': true,
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'set': true,
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'var': true,
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'let': true
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};
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const KEYWORD_TO_API_MAP = {
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'drop': 'ACTION_DROP',
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'accept': 'ACTION_ACCEPT',
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'tee': 'ACTION_TEE',
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'watch': 'ACTION_WATCH',
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'redirect': 'ACTION_REDIRECT',
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'break': 'ACTION_BREAK',
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'priority': 'ACTION_PRIORITY',
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'ztsrc': 'MATCH_SOURCE_ZEROTIER_ADDRESS',
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'ztdest': 'MATCH_DEST_ZEROTIER_ADDRESS',
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'vlan': 'MATCH_VLAN_ID',
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'vlanpcp': 'MATCH_VLAN_PCP',
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'vlandei': 'MATCH_VLAN_DEI',
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'ethertype': 'MATCH_ETHERTYPE',
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'macsrc': 'MATCH_MAC_SOURCE',
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'macdest': 'MATCH_MAC_DEST',
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//'ipsrc': '', // special handling since we programmatically differentiate between V4 and V6
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//'ipdest': '', // special handling
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'iptos': 'MATCH_IP_TOS',
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'ipprotocol': 'MATCH_IP_PROTOCOL',
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'icmp': 'MATCH_ICMP',
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'sport': 'MATCH_IP_SOURCE_PORT_RANGE',
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'dport': 'MATCH_IP_DEST_PORT_RANGE',
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'chr': 'MATCH_CHARACTERISTICS',
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'framesize': 'MATCH_FRAME_SIZE_RANGE',
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'random': 'MATCH_RANDOM',
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'tand': 'MATCH_TAGS_BITWISE_AND',
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'tor': 'MATCH_TAGS_BITWISE_OR',
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'txor': 'MATCH_TAGS_BITWISE_XOR',
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'tdiff': 'MATCH_TAGS_DIFFERENCE',
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'teq': 'MATCH_TAGS_EQUAL',
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'tseq': 'MATCH_TAG_SENDER',
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'treq': 'MATCH_TAG_RECEIVER'
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};
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// Number of args for each match
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const MATCH_ARG_COUNTS = {
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'ztsrc': 1,
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'ztdest': 1,
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'vlan': 1,
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'vlanpcp': 1,
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'vlandei': 1,
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'ethertype': 1,
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'macsrc': 1,
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'macdest': 1,
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'ipsrc': 1,
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'ipdest': 1,
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'iptos': 2,
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'ipprotocol': 1,
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'icmp': 2,
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'sport': 1,
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'dport': 1,
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'chr': 1,
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'framesize': 1,
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'random': 1,
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'tand': 2,
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'tor': 2,
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'txor': 2,
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'tdiff': 2,
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'teq': 2,
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'tseq': 2,
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'treq': 2
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};
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// Regex of all alphanumeric characters in Unicode
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const INTL_ALPHANUM_REGEX = new RegExp('[0-9A-Za-z\xAA\xB5\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0\u08A2-\u08AC\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0977\u0979-\u097F\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C33\u0C35-\u0C39\u0C3D\u0C58\u0C59\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D60\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1380-\u138F\u13A0-\u13F4\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191C\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19C1-\u19C7\u1A00-\u1A16\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2183\u2184\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005\u3006\u3031-\u3035\u303B\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA697\uA6A0-\uA6E5\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA793\uA7A0-\uA7AA\uA7F8-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA80-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uABC0-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]');
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// Checks whether something is a valid capability, tag, or macro name
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function _isValidName(n)
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{
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if ((typeof n !== 'string')||(n.length === 0)) return false;
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if ("0123456789".indexOf(n.charAt(0)) >= 0) return false;
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for(let i=0;i<n.length;++i) {
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let c = n.charAt(i);
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if ((c !== '_')&&(!INTL_ALPHANUM_REGEX.test(c))) return false;
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}
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return true;
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}
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// Regexes for checking the basic syntactic validity of IP addresses
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const IPV6_REGEX = new RegExp('(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))');
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const IPV4_REGEX = new RegExp('((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])');
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function _parseNum(n)
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{
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try {
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if ((typeof n !== 'string')||(n.length === 0))
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return -1;
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n = n.toLowerCase();
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if ((n.length > 2)&&(n.substr(0,2) === '0x'))
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n = parseInt(n.substr(2),16);
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else n = parseInt(n,10);
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return (((typeof n === 'number')&&(n !== null)&&(!isNaN(n))) ? n : -1);
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} catch (e) {
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return -1;
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}
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}
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function _cleanMac(m)
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{
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m = m.toLowerCase();
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var m2 = '';
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let charcount = 0;
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for(let i=0;((i<m.length)&&(m2.length<17));++i) {
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let c = m.charAt(i);
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if ("0123456789abcdef".indexOf(c) >= 0) {
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m2 += c;
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charcount++;
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if ((m2.length > 0)&&(m2.length !== 17)&&(charcount >= 2) ) {
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m2 += ':';
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charcount=0;
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}
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}
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}
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return m2;
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}
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function _cleanHex(m)
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{
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m = m.toLowerCase();
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var m2 = '';
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for(let i=0;i<m.length;++i) {
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let c = m.charAt(i);
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if ("0123456789abcdef".indexOf(c) >= 0)
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m2 += c;
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}
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return m2;
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}
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function _renderMatches(mtree,rules,macros,caps,tags,params)
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{
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let not = false;
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let or = false;
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for(let k=0;k<mtree.length;++k) {
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let match = (typeof mtree[k][0] === 'string') ? mtree[k][0].toLowerCase() : '';
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if ((match.length === 0)||(match === 'and')) { // AND is the default
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continue;
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} else if (match === 'not') {
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not = true;
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} else if (match === 'or') {
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or = true;
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} else {
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let args = [];
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let argCount = MATCH_ARG_COUNTS[match];
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if (!argCount)
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return [ mtree[k][1],mtree[k][2],'Unrecognized match type "'+match+'".' ];
|
|
for(let i=0;i<argCount;++i) {
|
|
if (++k >= mtree.length)
|
|
return [ mtree[k - 1][1],mtree[k - 1][2],'Missing argument(s) to match.' ];
|
|
let arg = mtree[k][0];
|
|
if ((typeof arg !== 'string')||(arg in RESERVED_WORDS)||(arg.length === 0))
|
|
return [ mtree[k - 1][1],mtree[k - 1][2],'Missing argument(s) to match (invalid argument or argument is reserved word).' ];
|
|
if (arg.charAt(0) === '$') {
|
|
let tmp = params[arg];
|
|
if (typeof tmp === 'undefined')
|
|
return [ mtree[k][1],mtree[k][2],'Undefined variable name.' ];
|
|
args.push([ tmp,mtree[k][1],mtree[k][2] ]);
|
|
} else {
|
|
args.push(mtree[k]);
|
|
}
|
|
}
|
|
|
|
switch(match) {
|
|
case 'ztsrc':
|
|
case 'ztdest': {
|
|
let zt = _cleanHex(args[0][0]);
|
|
if (zt.length !== 10)
|
|
return [ args[0][1],args[0][2],'Invalid ZeroTier address.' ];
|
|
rules.push({
|
|
'type': KEYWORD_TO_API_MAP[match],
|
|
'not': not,
|
|
'or': or,
|
|
'zt': zt
|
|
});
|
|
} break;
|
|
|
|
case 'vlan':
|
|
case 'vlanpcp':
|
|
case 'vlandei':
|
|
case 'ethertype':
|
|
case 'ipprotocol': {
|
|
let num = null;
|
|
switch (match) {
|
|
case 'ethertype': num = ETHERTYPES[args[0][0]]; break;
|
|
case 'ipprotocol': num = IP_PROTOCOLS[args[0][0]]; break;
|
|
}
|
|
if (typeof num !== 'number')
|
|
num = _parseNum(args[0][0]);
|
|
if ((typeof num !== 'number')||(num < 0)||(num > 0xffffffff)||(num === null))
|
|
return [ args[0][1],args[0][2],'Invalid numeric value.' ];
|
|
let r = {
|
|
'type': KEYWORD_TO_API_MAP[match],
|
|
'not': not,
|
|
'or': or
|
|
};
|
|
switch(match) {
|
|
case 'vlan': r['vlanId'] = num; break;
|
|
case 'vlanpcp': r['vlanPcp'] = num; break;
|
|
case 'vlandei': r['vlanDei'] = num; break;
|
|
case 'ethertype': r['etherType'] = num; break;
|
|
case 'ipprotocol': r['ipProtocol'] = num; break;
|
|
}
|
|
rules.push(r);
|
|
} break;
|
|
|
|
case 'random': {
|
|
let num = parseFloat(args[0][0])||0.0;
|
|
if (num < 0.0) num = 0.0;
|
|
if (num > 1.0) num = 1.0;
|
|
rules.push({
|
|
'type': KEYWORD_TO_API_MAP[match],
|
|
'not': not,
|
|
'or': or,
|
|
'probability': Math.floor(4294967295 * num)
|
|
});
|
|
} break;
|
|
|
|
case 'macsrc':
|
|
case 'macdest': {
|
|
let mac = _cleanMac(args[0][0]);
|
|
if (mac.length !== 17)
|
|
return [ args[0][1],args[0][2],'Invalid MAC address.' ];
|
|
rules.push({
|
|
'type': KEYWORD_TO_API_MAP[match],
|
|
'not': not,
|
|
'or': or,
|
|
'mac': mac
|
|
});
|
|
} break;
|
|
|
|
case 'ipsrc':
|
|
case 'ipdest': {
|
|
let ip = args[0][0];
|
|
let slashIdx = ip.indexOf('/');
|
|
if (slashIdx <= 0)
|
|
return [ args[0][1],args[0][2],'Missing /bits netmask length designation in IP.' ];
|
|
let ipOnly = ip.substr(0,slashIdx);
|
|
if (IPV6_REGEX.test(ipOnly)) {
|
|
rules.push({
|
|
'type': ((match === 'ipsrc') ? 'MATCH_IPV6_SOURCE' : 'MATCH_IPV6_DEST'),
|
|
'not': not,
|
|
'or': or,
|
|
'ip': ip
|
|
});
|
|
} else if (IPV4_REGEX.test(ipOnly)) {
|
|
rules.push({
|
|
'type': ((match === 'ipsrc') ? 'MATCH_IPV4_SOURCE' : 'MATCH_IPV4_DEST'),
|
|
'not': not,
|
|
'or': or,
|
|
'ip': ip
|
|
});
|
|
} else {
|
|
return [ args[0][1],args[0][2],'Invalid IP address (not valid IPv4 or IPv6).' ];
|
|
}
|
|
} break;
|
|
|
|
case 'icmp': {
|
|
let icmpType = _parseNum(args[0][0]);
|
|
if ((icmpType < 0)||(icmpType > 0xff))
|
|
return [ args[0][1],args[0][2],'Missing or invalid ICMP type.' ];
|
|
let icmpCode = _parseNum(args[1][0]); // -1 okay, indicates don't match code
|
|
if (icmpCode > 0xff)
|
|
return [ args[1][1],args[1][2],'Invalid ICMP code (use -1 for none).' ];
|
|
rules.push({
|
|
'type': 'MATCH_ICMP',
|
|
'not': not,
|
|
'or': or,
|
|
'icmpType': icmpType,
|
|
'icmpCode': ((icmpCode < 0) ? null : icmpCode)
|
|
});
|
|
} break;
|
|
|
|
case 'sport':
|
|
case 'dport':
|
|
case 'framesize': {
|
|
let arg = args[0][0];
|
|
let fn = null;
|
|
let tn = null;
|
|
if (arg.indexOf('-') > 0) {
|
|
let asplit = arg.split('-');
|
|
if (asplit.length !== 2) {
|
|
return [ args[0][1],args[0][2],'Invalid numeric range.' ];
|
|
} else {
|
|
fn = _parseNum(asplit[0]);
|
|
tn = _parseNum(asplit[1]);
|
|
}
|
|
} else {
|
|
fn = _parseNum(arg);
|
|
tn = fn;
|
|
}
|
|
if ((fn < 0)||(fn > 0xffff)||(tn < 0)||(tn > 0xffff)||(tn < fn))
|
|
return [ args[0][1],args[0][2],'Invalid numeric range.' ];
|
|
rules.push({
|
|
'type': KEYWORD_TO_API_MAP[match],
|
|
'not': not,
|
|
'or': or,
|
|
'start': fn,
|
|
'end': tn
|
|
});
|
|
} break;
|
|
|
|
case 'iptos': {
|
|
let mask = _parseNum(args[0][0]);
|
|
if ((typeof mask !== 'number')||(mask < 0)||(mask > 0xff)||(mask === null))
|
|
return [ args[0][1],args[0][2],'Invalid mask.' ];
|
|
let arg = args[1][0];
|
|
let fn = null;
|
|
let tn = null;
|
|
if (arg.indexOf('-') > 0) {
|
|
let asplit = arg.split('-');
|
|
if (asplit.length !== 2) {
|
|
return [ args[1][1],args[1][2],'Invalid value range.' ];
|
|
} else {
|
|
fn = _parseNum(asplit[0]);
|
|
tn = _parseNum(asplit[1]);
|
|
}
|
|
} else {
|
|
fn = _parseNum(arg);
|
|
tn = fn;
|
|
}
|
|
if ((fn < 0)||(fn > 0xff)||(tn < 0)||(tn > 0xff)||(tn < fn))
|
|
return [ args[1][1],args[1][2],'Invalid value range.' ];
|
|
rules.push({
|
|
'type': 'MATCH_IP_TOS',
|
|
'not': not,
|
|
'or': or,
|
|
'mask': mask,
|
|
'start': fn,
|
|
'end': tn
|
|
});
|
|
} break;
|
|
|
|
case 'chr': {
|
|
let chrb = args[0][0].split(/[,]+/);
|
|
let maskhi = 0;
|
|
let masklo = 0;
|
|
for(let i=0;i<chrb.length;++i) {
|
|
if (chrb[i].length > 0) {
|
|
let tmp = CHARACTERISTIC_BITS[chrb[i]];
|
|
let bit = (typeof tmp === 'number') ? tmp : _parseNum(chrb[i]);
|
|
if ((bit < 0)||(bit > 63))
|
|
return [ args[0][1],args[0][2],'Invalid bit index (range 0-63) or unrecognized name.' ];
|
|
if (bit >= 32)
|
|
maskhi |= Math.abs(1 << (bit - 32));
|
|
else masklo |= Math.abs(1 << bit);
|
|
}
|
|
}
|
|
maskhi = Math.abs(maskhi).toString(16);
|
|
while (maskhi.length < 8) maskhi = '0' + maskhi;
|
|
masklo = Math.abs(masklo).toString(16);
|
|
while (masklo.length < 8) masklo = '0' + masklo;
|
|
rules.push({
|
|
'type': 'MATCH_CHARACTERISTICS',
|
|
'not': not,
|
|
'or': or,
|
|
'mask': (maskhi + masklo)
|
|
});
|
|
} break;
|
|
|
|
case 'tand':
|
|
case 'tor':
|
|
case 'txor':
|
|
case 'tdiff':
|
|
case 'teq':
|
|
case 'tseq':
|
|
case 'treq': {
|
|
let tag = tags[args[0][0]];
|
|
let tagId = -1;
|
|
let tagValue = -1;
|
|
if (tag) {
|
|
tagId = tag.id;
|
|
tagValue = args[1][0];
|
|
if (tagValue in tag.flags)
|
|
tagValue = tag.flags[tagValue];
|
|
else if (tagValue in tag.enums)
|
|
tagValue = tag.enums[tagValue];
|
|
else tagValue = _parseNum(tagValue);
|
|
} else {
|
|
tagId = _parseNum(args[0][0]);
|
|
tagValue = _parseNum(args[1][0]);
|
|
}
|
|
if ((tagId < 0)||(tagId > 0xffffffff))
|
|
return [ args[0][1],args[0][2],'Undefined tag name and invalid tag value.' ];
|
|
if ((tagValue < 0)||(tagValue > 0xffffffff))
|
|
return [ args[1][1],args[1][2],'Invalid tag value or unrecognized flag/enum name.' ];
|
|
rules.push({
|
|
'type': KEYWORD_TO_API_MAP[match],
|
|
'not': not,
|
|
'or': or,
|
|
'id': tagId,
|
|
'value': tagValue
|
|
});
|
|
} break;
|
|
}
|
|
|
|
not = false;
|
|
or = false;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
function _renderActions(rtree,rules,macros,caps,tags,params)
|
|
{
|
|
for(let k=0;k<rtree.length;++k) {
|
|
let action = (typeof rtree[k][0] === 'string') ? rtree[k][0].toLowerCase() : '';
|
|
if (action.length === 0) {
|
|
continue;
|
|
} else if (action === 'include') {
|
|
if ((k + 1) >= rtree.length)
|
|
return [ rtree[k][1],rtree[k][2],'Include directive is missing a macro name.' ];
|
|
let macroName = rtree[k + 1][0];
|
|
++k;
|
|
|
|
let macroParamArray = [];
|
|
let parenIdx = macroName.indexOf('(');
|
|
if (parenIdx > 0) {
|
|
let pns = macroName.substr(parenIdx + 1).split(/[,)]+/);
|
|
for(let k=0;k<pns.length;++k) {
|
|
if (pns[k].length > 0)
|
|
macroParamArray.push(pns[k]);
|
|
}
|
|
macroName = macroName.substr(0,parenIdx);
|
|
}
|
|
|
|
let macro = macros[macroName];
|
|
if (!macro)
|
|
return [ rtree[k][1],rtree[k][2],'Macro name not found.' ];
|
|
let macroParams = {};
|
|
for(let param in macro.params) {
|
|
let pidx = macro.params[param];
|
|
if (pidx >= macroParamArray.length)
|
|
return [ rtree[k][1],rtree[k][2],'Missing one or more required macro parameter.' ];
|
|
macroParams[param] = macroParamArray[pidx];
|
|
}
|
|
|
|
let err = _renderActions(macro.rules,rules,macros,caps,tags,macroParams);
|
|
if (err !== null)
|
|
return err;
|
|
} else if ((action === 'drop')||(action === 'accept')||(action === 'break')) { // actions without arguments
|
|
if (((k + 1) < rtree.length)&&(Array.isArray(rtree[k + 1][0]))) {
|
|
let mtree = rtree[k + 1]; ++k;
|
|
let err = _renderMatches(mtree,rules,macros,caps,tags,params);
|
|
if (err !== null)
|
|
return err;
|
|
}
|
|
rules.push({
|
|
'type': KEYWORD_TO_API_MAP[action]
|
|
});
|
|
} else if ((action === 'tee')||(action === 'watch')) { // actions with arguments (ZeroTier address)
|
|
if (((k + 1) < rtree.length)&&(Array.isArray(rtree[k + 1][0]))&&(rtree[k + 1][0].length >= 2)) {
|
|
let mtree = rtree[k + 1]; ++k;
|
|
let maxLength = _parseNum(mtree[0][0]);
|
|
if ((maxLength < -1)||(maxLength > 0xffff))
|
|
return [ mtree[0][1],mtree[1][2],'Tee/watch max packet length to forward invalid or out of range.' ];
|
|
let target = mtree[1][0];
|
|
if ((typeof target !== 'string')||(target.length !== 10))
|
|
return [ mtree[1][1],mtree[1][2],'Missing or invalid ZeroTier address target for tee/watch.' ];
|
|
let err = _renderMatches(mtree.slice(2),rules,macros,caps,tags,params);
|
|
if (err !== null)
|
|
return err;
|
|
rules.push({
|
|
'type': KEYWORD_TO_API_MAP[action],
|
|
'address': target,
|
|
'length': maxLength
|
|
});
|
|
} else {
|
|
return [ rtree[k][1],rtree[k][2],'The tee and watch actions require two paremters (max length or 0 for all, target).' ];
|
|
}
|
|
} else if (action === 'redirect') {
|
|
if (((k + 1) < rtree.length)&&(Array.isArray(rtree[k + 1][0]))&&(rtree[k + 1][0].length >= 1)) {
|
|
let mtree = rtree[k + 1]; ++k;
|
|
let target = mtree[0][0];
|
|
if ((typeof target !== 'string')||(target.length !== 10))
|
|
return [ mtree[0][1],mtree[0][2],'Missing or invalid ZeroTier address target for redirect.' ];
|
|
let err = _renderMatches(mtree.slice(1),rules,macros,caps,tags,params);
|
|
if (err !== null)
|
|
return err;
|
|
rules.push({
|
|
'type': KEYWORD_TO_API_MAP[action],
|
|
'address': target
|
|
});
|
|
} else {
|
|
return [ rtree[k][1],rtree[k][2],'The redirect action requires a target parameter.' ];
|
|
}
|
|
} else {
|
|
return [ rtree[k][1],rtree[k][2],'Unrecognized action or directive in rule set.' ];
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
function compile(src,rules,caps,tags)
|
|
{
|
|
try {
|
|
if (typeof src !== 'string')
|
|
return [ 0,0,'"src" parameter must be a string.' ];
|
|
|
|
// Pass 1: parse source into a tree of arrays of elements. Each element is a 3-item
|
|
// tuple consisting of string, line number, and character index in line to enable
|
|
// informative error messages to be returned.
|
|
|
|
var blockStack = [ [] ];
|
|
var curr = [ '',-1,-1 ];
|
|
var skipRestOfLine = false;
|
|
for(let idx=0,lineNo=1,lineIdx=0;idx<src.length;++idx,++lineIdx) {
|
|
let ch = src.charAt(idx);
|
|
if (skipRestOfLine) {
|
|
if ((ch === '\r')||(ch === '\n')) {
|
|
skipRestOfLine = false;
|
|
++lineNo;
|
|
lineIdx = 0;
|
|
}
|
|
} else {
|
|
switch(ch) {
|
|
case '\n':
|
|
++lineNo;
|
|
lineIdx = 0;
|
|
case '\r':
|
|
case '\t':
|
|
case ' ':
|
|
if (curr[0].length > 0) {
|
|
let endOfBlock = false;
|
|
if (curr[0].charAt(curr[0].length - 1) === ';') {
|
|
endOfBlock = true;
|
|
curr[0] = curr[0].substr(0,curr[0].length - 1);
|
|
}
|
|
|
|
if (curr[0].length > 0) {
|
|
blockStack[blockStack.length - 1].push(curr);
|
|
}
|
|
if ((endOfBlock)&&(blockStack.length > 1)&&(blockStack[blockStack.length - 1].length > 0)) {
|
|
blockStack[blockStack.length - 2].push(blockStack[blockStack.length - 1]);
|
|
blockStack.pop();
|
|
} else if (curr[0] in OPEN_BLOCK_KEYWORDS) {
|
|
blockStack.push([]);
|
|
}
|
|
|
|
curr = [ '',-1,-1 ];
|
|
}
|
|
break;
|
|
default:
|
|
if (curr[0].length === 0) {
|
|
if (ch === '#') {
|
|
skipRestOfLine = true;
|
|
continue;
|
|
} else {
|
|
curr[1] = lineNo;
|
|
curr[2] = lineIdx;
|
|
}
|
|
}
|
|
curr[0] += ch;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (curr[0].length > 0) {
|
|
if (curr[0].charAt(curr[0].length - 1) === ';')
|
|
curr[0] = curr[0].substr(0,curr[0].length - 1);
|
|
if (curr[0].length > 0)
|
|
blockStack[blockStack.length - 1].push(curr);
|
|
}
|
|
while ((blockStack.length > 1)&&(blockStack[blockStack.length - 1].length > 0)) {
|
|
blockStack[blockStack.length - 2].push(blockStack[blockStack.length - 1]);
|
|
blockStack.pop();
|
|
}
|
|
var parsed = blockStack[0];
|
|
|
|
// Pass 2: parse tree into capabilities, tags, rule sets, and document-level rules.
|
|
|
|
let baseRuleTree = [];
|
|
let macros = {};
|
|
for(let i=0;i<parsed.length;++i) {
|
|
let keyword = (typeof parsed[i][0] === 'string') ? parsed[i][0].toLowerCase() : null;
|
|
if (keyword === 'macro') {
|
|
// Define macros
|
|
|
|
if ( ((i + 1) >= parsed.length) || (!Array.isArray(parsed[i + 1])) || (parsed[i + 1].length < 1) || (!Array.isArray(parsed[i + 1][0])) )
|
|
return [ parsed[i][1],parsed[i][2],'Macro definition is missing name.' ];
|
|
let macro = parsed[++i];
|
|
let macroName = macro[0][0].toLowerCase();
|
|
|
|
let params = {};
|
|
let parenIdx = macroName.indexOf('(');
|
|
if (parenIdx > 0) {
|
|
let pns = macroName.substr(parenIdx + 1).split(/[,)]+/);
|
|
for(let k=0;k<pns.length;++k) {
|
|
if (pns[k].length > 0)
|
|
params[pns[k]] = k;
|
|
}
|
|
macroName = macroName.substr(0,parenIdx);
|
|
}
|
|
|
|
if (!_isValidName(macroName))
|
|
return [ macro[0][1],macro[0][2],'Invalid macro name.' ];
|
|
if (macroName in RESERVED_WORDS)
|
|
return [ macro[0][1],macro[0][2],'Macro name is a reserved word.' ];
|
|
|
|
if (macroName in macros)
|
|
return [ macro[0][1],macro[0][2],'Multiple definition of macro name.' ];
|
|
|
|
macros[macroName] = {
|
|
params: params,
|
|
rules: macro.slice(1)
|
|
};
|
|
} else if (keyword === 'tag') {
|
|
// Define tags
|
|
|
|
if ( ((i + 1) >= parsed.length) || (!Array.isArray(parsed[i + 1])) || (parsed[i + 1].length < 1) || (!Array.isArray(parsed[i + 1][0])) )
|
|
return [ parsed[i][1],parsed[i][2],'Tag definition is missing name.' ];
|
|
let tag = parsed[++i];
|
|
let tagName = tag[0][0].toLowerCase();
|
|
|
|
if (!_isValidName(tagName))
|
|
return [ tag[0][1],tag[0][2],'Invalid tag name.' ];
|
|
if (tagName in RESERVED_WORDS)
|
|
return [ tag[0][1],tag[0][2],'Tag name is a reserved word.' ];
|
|
|
|
if (tagName in tags)
|
|
return [ tag[0][1],tag[0][2],'Multiple definition of tag name.' ];
|
|
|
|
let flags = {};
|
|
let enums = {};
|
|
let id = -1;
|
|
let dfl = null;
|
|
for(let k=1;k<tag.length;++k) {
|
|
let tkeyword = tag[k][0].toLowerCase();
|
|
if (tkeyword === 'id') {
|
|
if (id >= 0)
|
|
return [ tag[k][1],tag[k][2],'Duplicate tag id definition.' ];
|
|
if ((k + 1) >= tag.length)
|
|
return [ tag[k][1],tag[k][2],'Missing numeric value for ID.' ];
|
|
id = _parseNum(tag[++k][0]);
|
|
if ((id < 0)||(id > 0xffffffff))
|
|
return [ tag[k][1],tag[k][2],'Invalid or out of range tag ID.' ];
|
|
} else if (tkeyword === 'default') {
|
|
if (dfl !== null)
|
|
return [ tag[k][1],tag[k][2],'Duplicate tag default directive.' ];
|
|
if ((k + 1) >= tag.length)
|
|
return [ tag[k][1],tag[k][2],'Missing value for default.' ];
|
|
dfl = tag[++k][0];
|
|
} else if (tkeyword === 'flag') {
|
|
if ((k + 2) >= tag.length)
|
|
return [ tag[k][1],tag[k][2],'Missing tag flag name or bit index.' ];
|
|
++k;
|
|
let bits = tag[k][0].split(/[,]+/);
|
|
let mask = 0;
|
|
for(let j=0;j<bits.length;++j) {
|
|
let b = bits[j].toLowerCase();
|
|
if (b in flags) {
|
|
mask |= flags[b];
|
|
} else {
|
|
b = _parseNum(b);
|
|
if ((b < 0)||(b > 31))
|
|
return [ tag[k][1],tag[k][2],'Bit index invalid, out of range, or references an undefined flag name.' ];
|
|
mask |= (1 << b);
|
|
}
|
|
}
|
|
let flagName = tag[++k][0].toLowerCase();
|
|
if (!_isValidName(flagName))
|
|
return [ tag[k][1],tag[k][2],'Invalid or reserved flag name.' ];
|
|
if (flagName in flags)
|
|
return [ tag[k][1],tag[k][2],'Duplicate flag name in tag definition.' ];
|
|
flags[flagName] = mask;
|
|
} else if (tkeyword === 'enum') {
|
|
if ((k + 2) >= tag.length)
|
|
return [ tag[k][1],tag[k][2],'Missing tag enum name or value.' ];
|
|
++k;
|
|
let value = _parseNum(tag[k][0]);
|
|
if ((value < 0)||(value > 0xffffffff))
|
|
return [ tag[k][1],tag[k][2],'Tag enum value invalid or out of range.' ];
|
|
let enumName = tag[++k][0].toLowerCase();
|
|
if (!_isValidName(enumName))
|
|
return [ tag[k][1],tag[k][2],'Invalid or reserved tag enum name.' ];
|
|
if (enumName in enums)
|
|
return [ tag[k][1],tag[k][2],'Duplicate enum name in tag definition.' ];
|
|
enums[enumName] = value;
|
|
} else {
|
|
return [ tag[k][1],tag[k][2],'Unrecognized keyword in tag definition.' ];
|
|
}
|
|
}
|
|
if (id < 0)
|
|
return [ tag[0][1],tag[0][2],'Tag definition is missing a numeric ID.' ];
|
|
|
|
if (typeof dfl === 'string') {
|
|
let dfl2 = enums[dfl];
|
|
if (typeof dfl2 === 'number') {
|
|
dfl = dfl2;
|
|
} else {
|
|
dfl2 = flags[dfl];
|
|
if (typeof dfl2 === 'number') {
|
|
dfl = dfl2;
|
|
} else {
|
|
dfl = Math.abs(parseInt(dfl)||0) & 0xffffffff;
|
|
}
|
|
}
|
|
} else if (typeof dfl === 'number') {
|
|
dfl = Math.abs(dfl) & 0xffffffff;
|
|
}
|
|
|
|
tags[tagName] = {
|
|
'id': id,
|
|
'default': dfl,
|
|
'enums': enums,
|
|
'flags': flags
|
|
};
|
|
} else if (keyword === 'cap') {
|
|
// Define capabilities
|
|
|
|
if ( ((i + 1) >= parsed.length) || (!Array.isArray(parsed[i + 1])) || (parsed[i + 1].length < 1) || (!Array.isArray(parsed[i + 1][0])) )
|
|
return [ parsed[i][1],parsed[i][2],'Capability definition is missing name.' ];
|
|
let cap = parsed[++i];
|
|
let capName = cap[0][0].toLowerCase();
|
|
|
|
if (!_isValidName(capName))
|
|
return [ cap[0][1],cap[0][2],'Invalid capability name.' ];
|
|
if (capName in RESERVED_WORDS)
|
|
return [ cap[0][1],cap[0][2],'Capability name is a reserved word.' ];
|
|
|
|
if (capName in caps)
|
|
return [ cap[0][1],cap[0][2],'Multiple definition of capability name.' ];
|
|
|
|
let capRules = [];
|
|
let id = -1;
|
|
let dfl = false;
|
|
for(let k=1;k<cap.length;++k) {
|
|
let dn = (typeof cap[k][0] === 'string') ? cap[k][0].toLowerCase() : null;
|
|
if (dn === 'id') {
|
|
if (id >= 0)
|
|
return [ cap[k][1],cap[k][2],'Duplicate id directive in capability definition.' ];
|
|
if ((k + 1) >= cap.length)
|
|
return [ cap[k][1],cap[k][2],'Missing value for ID.' ];
|
|
id = _parseNum(cap[++k][0]);
|
|
if ((id < 0)||(id > 0xffffffff))
|
|
return [ cap[k - 1][1],cap[k - 1][2],'Invalid or out of range capability ID.' ];
|
|
for(let cn in caps) {
|
|
if (caps[cn].id === id)
|
|
return [ cap[k - 1][1],cap[k - 1][2],'Duplicate capability ID.' ];
|
|
}
|
|
} else if (dn === 'default') {
|
|
dfl = true;
|
|
} else {
|
|
capRules.push(cap[k]);
|
|
}
|
|
}
|
|
if (id < 0)
|
|
return [ cap[0][1],cap[0][2],'Capability definition is missing a numeric ID.' ];
|
|
|
|
caps[capName] = {
|
|
'id': id,
|
|
'default': dfl,
|
|
'rules': capRules
|
|
};
|
|
} else {
|
|
baseRuleTree.push(parsed[i]);
|
|
}
|
|
}
|
|
|
|
// Pass 3: render low-level ZeroTier rules arrays for capabilities and base.
|
|
|
|
for(let capName in caps) {
|
|
let r = [];
|
|
let err = _renderActions(caps[capName].rules,r,macros,caps,tags,{});
|
|
if (err !== null)
|
|
return err;
|
|
caps[capName].rules = r;
|
|
}
|
|
|
|
let err = _renderActions(baseRuleTree,rules,macros,caps,tags,{});
|
|
if (err !== null)
|
|
return err;
|
|
|
|
return null;
|
|
} catch (e) {
|
|
console.log(e.stack);
|
|
return [ 0,0,'Unexpected exception: '+e.toString() ];
|
|
}
|
|
}
|
|
|
|
exports.compile = compile;
|