* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
*
* (c) ZeroTier, Inc.
* https://www.zerotier.com/
*/
"use strict";
const CHARACTERISTIC_BITS = {
inbound: 63,
multicast: 62,
broadcast: 61,
ipauth: 60,
macauth: 59,
tcp_fin: 0,
tcp_syn: 1,
tcp_rst: 2,
tcp_psh: 3,
tcp_ack: 4,
tcp_urg: 5,
tcp_ece: 6,
tcp_cwr: 7,
tcp_ns: 8,
tcp_rs2: 9,
tcp_rs1: 10,
tcp_rs0: 11,
};
const ETHERTYPES = {
ipv4: 0x0800,
arp: 0x0806,
wol: 0x0842,
rarp: 0x8035,
ipv6: 0x86dd,
atalk: 0x809b,
aarp: 0x80f3,
ipx_a: 0x8137,
ipx_b: 0x8138,
};
const IP_PROTOCOLS = {
icmp: 0x01,
icmp4: 0x01,
icmpv4: 0x01,
igmp: 0x02,
ipip: 0x04,
tcp: 0x06,
egp: 0x08,
igp: 0x09,
udp: 0x11,
rdp: 0x1b,
esp: 0x32,
ah: 0x33,
icmp6: 0x3a,
icmpv6: 0x3a,
l2tp: 0x73,
sctp: 0x84,
udplite: 0x88,
};
const OPEN_BLOCK_KEYWORDS = {
macro: true,
tag: true,
cap: true,
drop: true,
accept: true,
tee: true,
watch: true,
redirect: true,
break: true,
priority: true,
};
const RESERVED_WORDS = {
macro: true,
tag: true,
cap: true,
default: true,
drop: true,
accept: true,
tee: true,
watch: true,
redirect: true,
break: true,
priority: true,
ztsrc: true,
ztdest: true,
vlan: true,
vlanpcp: true,
vlandei: true,
ethertype: true,
macsrc: true,
macdest: true,
ipsrc: true,
ipdest: true,
iptos: true,
ipprotocol: true,
icmp: true,
sport: true,
dport: true,
chr: true,
framesize: true,
random: true,
tand: true,
tor: true,
txor: true,
tdiff: true,
teq: true,
tseq: true,
treq: true,
type: true,
enum: true,
class: true,
define: true,
import: true,
include: true,
log: true,
not: true,
xor: true,
or: true,
and: true,
set: true,
var: true,
let: true,
};
const KEYWORD_TO_API_MAP = {
drop: "ACTION_DROP",
accept: "ACTION_ACCEPT",
tee: "ACTION_TEE",
watch: "ACTION_WATCH",
redirect: "ACTION_REDIRECT",
break: "ACTION_BREAK",
priority: "ACTION_PRIORITY",
ztsrc: "MATCH_SOURCE_ZEROTIER_ADDRESS",
ztdest: "MATCH_DEST_ZEROTIER_ADDRESS",
vlan: "MATCH_VLAN_ID",
vlanpcp: "MATCH_VLAN_PCP",
vlandei: "MATCH_VLAN_DEI",
ethertype: "MATCH_ETHERTYPE",
macsrc: "MATCH_MAC_SOURCE",
macdest: "MATCH_MAC_DEST",
iptos: "MATCH_IP_TOS",
ipprotocol: "MATCH_IP_PROTOCOL",
icmp: "MATCH_ICMP",
sport: "MATCH_IP_SOURCE_PORT_RANGE",
dport: "MATCH_IP_DEST_PORT_RANGE",
chr: "MATCH_CHARACTERISTICS",
framesize: "MATCH_FRAME_SIZE_RANGE",
random: "MATCH_RANDOM",
tand: "MATCH_TAGS_BITWISE_AND",
tor: "MATCH_TAGS_BITWISE_OR",
txor: "MATCH_TAGS_BITWISE_XOR",
tdiff: "MATCH_TAGS_DIFFERENCE",
teq: "MATCH_TAGS_EQUAL",
tseq: "MATCH_TAG_SENDER",
treq: "MATCH_TAG_RECEIVER",
};
const MATCH_ARG_COUNTS = {
ztsrc: 1,
ztdest: 1,
vlan: 1,
vlanpcp: 1,
vlandei: 1,
ethertype: 1,
macsrc: 1,
macdest: 1,
ipsrc: 1,
ipdest: 1,
iptos: 2,
ipprotocol: 1,
icmp: 2,
sport: 1,
dport: 1,
chr: 1,
framesize: 1,
random: 1,
tand: 2,
tor: 2,
txor: 2,
tdiff: 2,
teq: 2,
tseq: 2,
treq: 2,
};
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]",
);
function _isValidName(n) {
if (typeof n !== "string" || n.length === 0) return false;
if ("0123456789".indexOf(n.charAt(0)) >= 0) return false;
for (let i = 0; i < n.length; ++i) {
let c = n.charAt(i);
if (c !== "_" && !INTL_ALPHANUM_REGEX.test(c)) return false;
}
return true;
}
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]))",
);
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])",
);
function _parseNum(n) {
try {
if (typeof n !== "string" || n.length === 0) return -1;
n = n.toLowerCase();
if (n.length > 2 && n.substr(0, 2) === "0x") n = parseInt(n.substr(2), 16);
else n = parseInt(n, 10);
return typeof n === "number" && n !== null && !isNaN(n) ? n : -1;
} catch (e) {
return -1;
}
}
function _cleanMac(m) {
m = m.toLowerCase();
var m2 = "";
let charcount = 0;
for (let i = 0; i < m.length && m2.length < 17; ++i) {
let c = m.charAt(i);
if ("0123456789abcdef".indexOf(c) >= 0) {
m2 += c;
charcount++;
if (m2.length > 0 && m2.length !== 17 && charcount >= 2) {
m2 += ":";
charcount = 0;
}
}
}
return m2;
}
function _cleanHex(m) {
m = m.toLowerCase();
var m2 = "";
for (let i = 0; i < m.length; ++i) {
let c = m.charAt(i);
if ("0123456789abcdef".indexOf(c) >= 0) m2 += c;
}
return m2;
}
function _renderMatches(mtree, rules, macros, caps, tags, params) {
let not = false;
let or = false;
for (let k = 0; k < mtree.length; ++k) {
let match =
typeof mtree[k][0] === "string" ? mtree[k][0].toLowerCase() : "";
if (match.length === 0 || match === "and") {
continue;
} else if (match === "not") {
not = true;
} else if (match === "or") {
or = true;
} else {
let args = [];
let argCount = MATCH_ARG_COUNTS[match];
if (!argCount)
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]);
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") {
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") {
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.'];
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];
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") {
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") {
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") {
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]);
}
}
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;