765 lines
29 KiB
JavaScript
765 lines
29 KiB
JavaScript
// server.js — robust HTTP→TCP bridge for ABS (ABS_POLL, LOG, BTI, RPI)
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// Node 18+ (CommonJS)
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const express = require("express");
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const net = require("net");
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const ABS_HOST = process.env.ABS_HOST || "192.0.0.14";
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const ABS_PORT = Number(process.env.ABS_PORT || 7000);
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const ABS_POLL = 178;
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const LOG = 100;
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const LOGBT = 6013;
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const BTI = 6014;
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const RPI = 6015;
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const SUCCESS = 0;
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const PKT_SIZE = 512;
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const PAYLOAD_PER_PKT = PKT_SIZE - 1;
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const DEFAULT_TIMEOUT_MS = Number(process.env.BRIDGE_TIMEOUT_MS || 20000);
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const RETRIES = Number(process.env.BRIDGE_RETRIES || 2);
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const RETRY_DELAY_MS = Number(process.env.BRIDGE_RETRY_DELAY_MS || 500);
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const app = express();
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function readJsonBody(req) {
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return new Promise((resolve) => {
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const chunks = [];
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req.on("data", (c) => chunks.push(c));
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req.on("end", () => {
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if (!chunks.length) return resolve({});
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const txt = Buffer.concat(chunks).toString("utf8").trim();
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if (!txt) return resolve({});
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try { resolve(JSON.parse(txt)); } catch { resolve({}); }
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});
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});
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}
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// ---------- helpers ----------
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function writeFixedAscii(buf, offset, s, len) {
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const str = (s ?? "").toString();
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for (let i = 0; i < len; i++) buf[offset + i] = i < str.length ? (str.charCodeAt(i) & 0xff) : 0x00;
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return offset + len;
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}
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function readFixedAscii(buf, offset, len) {
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let end = offset;
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const max = offset + len;
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while (end < max && buf[end] !== 0) end++;
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const raw = buf.subarray(offset, end).toString("ascii");
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return { value: raw.trimEnd(), next: offset + len };
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}
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function hexSlice(buf, off, len) {
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const s = Math.max(0, off);
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const e = Math.min(buf.length, off + len);
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return buf.subarray(s, e).toString("hex");
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}
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function remaining(buf, off){ return Math.max(0, buf.length - off); }
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// ---------- packetization ----------
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function absSend(sock, payload) {
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return new Promise((resolve, reject) => {
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let off = 0;
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function sendNext() {
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const remaining = payload.length - off;
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const toCopy = Math.min(PAYLOAD_PER_PKT, Math.max(remaining, 0));
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const pkt = Buffer.alloc(PKT_SIZE, 0);
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pkt[0] = (off + toCopy >= payload.length) ? 48 : 49;
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if (toCopy > 0) payload.copy(pkt, 1, off, off + toCopy);
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off += toCopy;
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sock.write(pkt, (err) => {
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if (err) return reject(err);
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if (pkt[0] === 48) return resolve();
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sendNext();
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});
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}
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if (!payload || payload.length === 0) {
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const pkt = Buffer.alloc(PKT_SIZE, 0);
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pkt[0] = 48;
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sock.write(pkt, (err) => err ? reject(err) : resolve());
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} else {
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sendNext();
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}
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});
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}
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function absRecv(sock, timeoutMs = DEFAULT_TIMEOUT_MS) {
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return new Promise((resolve, reject) => {
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const chunks = [];
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let buf = Buffer.alloc(0);
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const timer = timeoutMs ? setTimeout(() => done(new Error("TCP timeout")), timeoutMs) : null;
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function done(err) {
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if (timer) clearTimeout(timer);
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sock.off("data", onData);
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if (err) reject(err);
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else resolve(Buffer.concat(chunks));
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}
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function onData(data) {
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buf = Buffer.concat([buf, data]);
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while (buf.length >= PKT_SIZE) {
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const pkt = buf.subarray(0, PKT_SIZE);
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buf = buf.subarray(PKT_SIZE);
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const flag = pkt[0];
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chunks.push(pkt.subarray(1));
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if (flag === 48) return done();
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}
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}
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sock.on("data", onData);
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sock.on("error", (e) => done(e));
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sock.on("end", () => done(new Error("Socket ended before final '0' packet")));
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});
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}
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async function absRoundtrip(payload, timeoutMs = DEFAULT_TIMEOUT_MS) {
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const sock = new net.Socket();
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await new Promise((res, rej) => sock.connect(ABS_PORT, ABS_HOST, res).once("error", rej));
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try {
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await absSend(sock, payload || Buffer.alloc(0));
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const replyConcat = await absRecv(sock, timeoutMs);
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sock.end();
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return replyConcat;
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} catch (e) {
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try { sock.destroy(); } catch {}
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throw e;
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}
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}
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async function withRetry(fn, tries = RETRIES, delayMs = RETRY_DELAY_MS) {
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let lastErr;
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for (let i=0;i<tries;i++){
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try { return await fn(); }
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catch (e){ lastErr = e; if (i+1<tries) await new Promise(r=>setTimeout(r, delayMs)); }
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}
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throw lastErr;
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}
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// ---------- MFC-style password "encryption" ----------
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function encryptPasswordLikeMFC(plain) {
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const sec = new Date().getUTCSeconds();
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const key = Number(String(sec)[0] || "0");
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let out = "";
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const s = (plain ?? "").toString();
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for (let i = 0; i < s.length; i++) {
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const ch = s[i];
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const d = (ch >= "0" && ch <= "9") ? (ch.charCodeAt(0) - 48) : 0;
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out += String((d + key) % 10);
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}
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return { enc: out + String(key), key, utcSeconds: sec };
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}
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// ---------- headers ----------
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function packSndHeader({ nTxnCd, nOpCd = 0, nNumRecsSent = 0, nNumRecsRqrd = 0, nTxnId = 0, cBtMake = 0 }) {
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const b = Buffer.alloc(24, 0);
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let o = 0;
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b.writeInt32LE(nTxnCd, o); o += 4;
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b.writeInt32LE(nOpCd, o); o += 4;
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b.writeInt32LE(nNumRecsSent, o); o += 4;
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b.writeInt32LE(nNumRecsRqrd, o); o += 4;
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b.writeInt32LE(nTxnId, o); o += 4;
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b.writeUInt8(cBtMake & 0xff, o);
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return b;
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}
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/** Smart header parser: test 18 & 24, choose plausible. */
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function parseRcvHeaderFlexible(buf) {
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if (buf.length < 18) throw new Error(`Reply too short for RcvHeader: ${buf.length} bytes`);
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function readAs(len) {
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let o = 0;
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const nTxnCd = buf.readInt32LE(o); o += 4;
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const nRetCd = buf.readInt32LE(o); o += 4;
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const nNumRecs = buf.readInt32LE(o); o += 4;
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const nTxnId = buf.readInt32LE(o); o += 4;
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const cBtMake = buf.readUInt8(o);
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return { nTxnCd, nRetCd, nNumRecs, nTxnId, cBtMake, size: len };
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}
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const h18 = readAs(18);
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const ok18 = (h18.nTxnCd >= 50 && h18.nTxnCd < 10000) && (h18.nRetCd >= 0 && h18.nRetCd < 10000);
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let h24=null, ok24=false;
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if (buf.length >= 24) {
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h24 = readAs(24);
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ok24 = (h24.nTxnCd >= 50 && h24.nTxnCd < 10000) && (h24.nRetCd >= 0 && h24.nRetCd < 10000);
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}
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if (ok18 && !ok24) return h18;
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if (!ok18 && ok24) return h24;
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if (ok18 && ok24) return h18; // prefer 18 to avoid over-advancing
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return h18;
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}
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function buildRcvHeader18({ nTxnCd, nRetCd, nNumRecs = 0, nTxnId = 0, cBtMake = 0 }) {
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const b = Buffer.alloc(18, 0);
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let o = 0;
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b.writeInt32LE(nTxnCd, o); o += 4;
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b.writeInt32LE(nRetCd, o); o += 4;
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b.writeInt32LE(nNumRecs, o); o += 4;
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b.writeInt32LE(nTxnId, o); o += 4;
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b.writeUInt8(cBtMake & 0xff, o);
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return b;
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}
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// ---------- aligners / detectors ----------
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function looksLikeHeaderAt(buf, off){
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if (remaining(buf, off) < 18) return false;
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try {
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const nTxnCd = buf.readInt32LE(off);
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return (nTxnCd >= 50 && nTxnCd < 10000);
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} catch { return false; }
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}
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/** align to plausible header; try +0 / +4 */
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function alignToPossibleHeader(reply, off) {
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if (looksLikeHeaderAt(reply, off)) return off;
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if (remaining(reply, off) >= 22 && looksLikeHeaderAt(reply, off + 4)) return off + 4;
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return off;
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}
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/** align to where ASCII year "20" begins for login body */
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function alignToAsciiYear(reply, off) {
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const tryOffsets = [0, 2, 4, -4];
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for (const d of tryOffsets) {
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const o = off + d;
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if (o >= 0 && o + 1 < reply.length) {
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const b0 = reply[o], b1 = reply[o+1];
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if (b0 === 0x32 && b1 === 0x30) return o; // '2''0'
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if (reply[o] === 0x2f && o >= 4 && reply[o-4] === 0x32 && reply[o-3] === 0x30) return o-4;
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}
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}
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return off;
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}
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function adjustForOptionalOp(replyBuf, bodyOffset) {
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if (replyBuf.length >= bodyOffset + 4) {
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const maybeOp = replyBuf.readInt32LE(bodyOffset);
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if (maybeOp === LOGBT || maybeOp === LOG || maybeOp === 0 || (maybeOp >= 100 && maybeOp <= 10000)) {
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return { offset: bodyOffset + 4, extraOp: maybeOp };
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} else {
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const looksLikeYear = replyBuf[bodyOffset] === 0x32 && replyBuf[bodyOffset + 1] === 0x30;
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const looksLikeYearFwd = replyBuf[bodyOffset + 4] === 0x32 && replyBuf[bodyOffset + 5] === 0x30;
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if (!looksLikeYear && looksLikeYearFwd) return { offset: bodyOffset + 4, extraOp: null };
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}
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}
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if (bodyOffset >= 4 && replyBuf[bodyOffset] === 0x2f) {
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const couldBeYear = replyBuf[bodyOffset - 4] === 0x32 && replyBuf[bodyOffset - 3] === 0x30;
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if (couldBeYear) return { offset: bodyOffset - 4, extraOp: null };
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}
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return { offset: bodyOffset, extraOp: null };
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}
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function safeAdvanceOrBreak(buf, off, want, outObj){
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if (remaining(buf, off) < want){
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outObj._truncated = true;
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return false;
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}
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return true;
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}
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// ---------- parsers ----------
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function packSndLog({ usrId = "", opCard, passwd, btId }) {
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const b = Buffer.alloc(38, 0);
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let o = 0;
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o = writeFixedAscii(b, o, usrId, 5);
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o = writeFixedAscii(b, o, opCard, 17);
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o = writeFixedAscii(b, o, passwd, 11);
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o = writeFixedAscii(b, o, btId, 5);
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return b;
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}
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function parseRcvLog(buf, offset = 0) {
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let o = offset;
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const t1 = readFixedAscii(buf, o, 20); const cDateTime = t1.value; o = t1.next;
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const t2 = readFixedAscii(buf, o, 31); const cUsrNm = t2.value; o = t2.next;
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const t3 = readFixedAscii(buf, o, 5 ); const cUsrId = t3.value; o = t3.next;
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const t4 = readFixedAscii(buf, o, 31); const cSupNm = t4.value; o = t4.next;
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const t5 = readFixedAscii(buf, o, 5 ); const cSupId = t5.value; o = t5.next;
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const t6 = readFixedAscii(buf, o, 5 ); const cUsrTyp = t6.value; o = t6.next;
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function rf() { const v = buf.readFloatLE(o); o += 4; return v; }
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function ri() { const v = buf.readInt32LE(o); o += 4; return v; }
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const fOpenBal = rf();
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const fTktSalesByVoucher = rf();
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const fTktSalesByCash = rf();
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const fTktSalesByMemCard = rf();
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const nTktSalesByVoucherCount = ri();
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const nTktSalesByCashCount = ri();
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const nTktSalesByMemCardCount = ri();
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const fPayoutByVoucher = rf();
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const fPayoutByCash = rf();
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const fPayoutByMemCard = rf();
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const nPayoutByVoucherCount = ri();
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const nPayoutByCashCount = ri();
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const nPayoutByMemCardCount = ri();
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const fCancelByVoucher = rf();
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const fCancelByCash = rf();
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const fCancelByMemCard = rf();
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const nCancelByVoucherCount = ri();
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const nCancelByCashCount = ri();
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const nCancelByMemCardCount = ri();
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const fDeposit = rf();
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const fWithdrawAmt = rf();
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const fVoucherSales = rf();
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const fVoucherEncash = rf();
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const fCloseBal = rf();
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const fSaleTarget = rf();
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return {
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cDateTime, cUsrNm, cUsrId, cSupNm, cSupId, cUsrTyp,
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fOpenBal, fTktSalesByVoucher, fTktSalesByCash, fTktSalesByMemCard,
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nTktSalesByVoucherCount, nTktSalesByCashCount, nTktSalesByMemCardCount,
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fPayoutByVoucher, fPayoutByCash, fPayoutByMemCard,
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nPayoutByVoucherCount, nPayoutByCashCount, nPayoutByMemCardCount,
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fCancelByVoucher, fCancelByCash, fCancelByMemCard,
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nCancelByVoucherCount, nCancelByCashCount, nCancelByMemCardCount,
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fDeposit, fWithdrawAmt, fVoucherSales, fVoucherEncash,
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fCloseBal, fSaleTarget,
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size: o - offset
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};
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}
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// function parseRcvBtiMst(buf, offset) {
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// let o = offset;
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// const a1 = readFixedAscii(buf, o, 5); const cBtId = a1.value; o = a1.next;
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// const a2 = readFixedAscii(buf, o, 31); const cBtName = a2.value; o = a2.next;
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// const a3 = readFixedAscii(buf, o, 5); const cEnclCd = a3.value; o = a3.next;
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// const a4 = readFixedAscii(buf, o, 4); const cGrpCd = a4.value; o = a4.next;
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// const cBtMode = String.fromCharCode(buf[o]); o += 1;
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// const a5 = readFixedAscii(buf, o, 4); const cMoneyTyp = a5.value; o = a5.next;
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// // Debug: raw hex of these fields
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// console.error("fMinSaleBet raw:", buf.subarray(o, o+4).toString("hex"));
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// const fMinSaleBet = buf.readInt32LE(o); o += 4;
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// console.error("fMaxSaleBet raw:", buf.subarray(o, o+4).toString("hex"));
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// const fMaxSaleBet = buf.readInt32LE(o); o += 4;
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// console.error("fPayMaxAmt raw:", buf.subarray(o, o+4).toString("hex"));
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// const fPayMaxAmt = buf.readInt32LE(o); o += 4;
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// return {
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// cBtId, cBtName, cEnclCd, cGrpCd,
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// cBtMode, cMoneyTyp,
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// fMinSaleBet, fMaxSaleBet, fPayMaxAmt,
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// size: o - offset
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// };
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// }
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function parseRcvBtiMst(buf, offset) {
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let o = offset;
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const a1 = readFixedAscii(buf, o, 5); const cBtId = a1.value; o = a1.next;
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const a2 = readFixedAscii(buf, o, 31); const cBtName = a2.value; o = a2.next;
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const a3 = readFixedAscii(buf, o, 5); const cEnclCd = a3.value; o = a3.next;
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const a4 = readFixedAscii(buf, o, 4); const cGrpCd = a4.value; o = a4.next;
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const cBtMode = String.fromCharCode(buf[o]); o += 1;
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const a5 = readFixedAscii(buf, o, 4); const cMoneyTyp = a5.value; o = a5.next;
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// align to 4-byte boundary (for float fields)
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o = (o + 3) & ~3;
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console.error("fMinSaleBet raw:", buf.subarray(o, o+4).toString("hex"));
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const fMinSaleBet = buf.readFloatLE(o); o += 4;
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console.error("fMaxSaleBet raw:", buf.subarray(o, o+4).toString("hex"));
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const fMaxSaleBet = buf.readFloatLE(o); o += 4;
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console.error("fPayMaxAmt raw:", buf.subarray(o, o+4).toString("hex"));
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const fPayMaxAmt = buf.readFloatLE(o); o += 4;
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return {
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cBtId, cBtName, cEnclCd, cGrpCd,
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cBtMode, cMoneyTyp,
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fMinSaleBet, fMaxSaleBet, fPayMaxAmt,
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size: o - offset
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};
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}
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function parseRcvBtiDtl(buf, offset) {
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let o = offset;
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const cDtlTyp = String.fromCharCode(buf[o]); o += 1;
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// If not enough bytes to try the happy path, take what's available
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if (remaining(buf, o) < 4) {
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const avail = Math.max(0, remaining(buf, o));
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const aRem = readFixedAscii(buf, o, avail);
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const cPoolOrVenue = aRem.value;
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o = aRem.next;
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const cDtlSts = o < buf.length ? String.fromCharCode(buf[o]) : "";
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if (o < buf.length) o += 1;
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return { cDtlTyp, cPoolOrVenue, cDtlSts, size: o - offset };
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}
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// Try 3-byte pool/venue first (most common)
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const a3 = readFixedAscii(buf, o, 3);
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const cPoolOrVenue3 = a3.value;
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const after3 = a3.next;
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// Candidate status byte (must be printable ASCII — typical statuses are letters/digits)
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const statusCandidate = buf[after3];
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const isPrintable = (statusCandidate >= 0x20 && statusCandidate <= 0x7E);
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if (isPrintable) {
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o = after3;
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const cDtlSts = String.fromCharCode(buf[o]); o += 1;
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return { cDtlTyp, cPoolOrVenue: cPoolOrVenue3, cDtlSts, size: o - offset };
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}
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// Fallback: read 4-byte pool/venue (older/odd layouts)
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const a4 = readFixedAscii(buf, o, 4);
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const cPoolOrVenue4 = a4.value;
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o = a4.next;
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const cDtlSts = o < buf.length ? String.fromCharCode(buf[o]) : "";
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if (o < buf.length) o += 1;
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return { cDtlTyp, cPoolOrVenue: cPoolOrVenue4, cDtlSts, size: o - offset };
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}
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function parseRcvRpi1(buf, offset) {
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let o = offset;
|
|
const nRaceDt = buf.readInt32LE(o); o += 4;
|
|
const cVenueNum = buf.readUInt8(o); o += 1;
|
|
const cVenueSts = String.fromCharCode(buf[o]); o += 1;
|
|
const aR = readFixedAscii(buf, o, 15); const cRaces = aR.value; o = aR.next;
|
|
const aAd = readFixedAscii(buf, o, 41); const cAdvertisement = aAd.value; o = aAd.next;
|
|
return { nRaceDt, cVenueNum, cVenueSts, cRaces, cAdvertisement, size: o - offset };
|
|
}
|
|
function parseRcvRpi2(buf, offset) {
|
|
let o = offset;
|
|
const nRaceDt = buf.readInt32LE(o); o += 4;
|
|
const cVenueNum = buf.readUInt8(o); o += 1;
|
|
const cRaceNum = buf.readUInt8(o); o += 1;
|
|
const aH = readFixedAscii(buf, o, 25); const cHorses = aH.value; o = aH.next;
|
|
const nRaceStartTm = buf.readInt32LE(o); o += 4;
|
|
return { nRaceDt, cVenueNum, cRaceNum, cHorses, nRaceStartTm, size: o - offset };
|
|
}
|
|
function parseRcvRpi3(buf, offset) {
|
|
let o = offset;
|
|
const nRaceDt = buf.readInt32LE(o); o += 4;
|
|
const cVenueNum = buf.readUInt8(o); o += 1;
|
|
const cRaceNum = buf.readUInt8(o); o += 1;
|
|
const aP = readFixedAscii(buf, o, 9); const cPools = aP.value; o = aP.next;
|
|
return { nRaceDt, cVenueNum, cRaceNum, cPools, size: o - offset };
|
|
}
|
|
function parseRcvRpi4(buf, offset) {
|
|
let o = offset;
|
|
const nRaceDt = buf.readInt32LE(o); o += 4;
|
|
const cVenueNum = buf.readUInt8(o); o += 1;
|
|
const cRaceNum = buf.subarray(o, o + 3).toString("ascii").replace(/\0/g, ""); o += 3;
|
|
const aSel = readFixedAscii(buf, o, 11); const cSelectRaceNum = aSel.value; o = aSel.next;
|
|
const cPoolSts = String.fromCharCode(buf[o]); o += 1;
|
|
return { nRaceDt, cVenueNum, cRaceNum, cSelectRaceNum, cPoolSts, size: o - offset };
|
|
}
|
|
function parseRcvPvm(buf, offset) {
|
|
let o = offset;
|
|
const a1 = readFixedAscii(buf, o, 4); const cRaceVenue = a1.value; o = a1.next;
|
|
const a2 = readFixedAscii(buf, o, 4); const cPoolId = a2.value; o = a2.next;
|
|
const fUnitPrice = buf.readFloatLE(o); o += 4;
|
|
const fTaxRate = buf.readFloatLE(o); o += 4;
|
|
const fDeductRate = buf.readFloatLE(o); o += 4;
|
|
const a3 = readFixedAscii(buf, o, 31); const cRemarks = a3.value; o = a3.next;
|
|
return { cRaceVenue, cPoolId, fUnitPrice, fTaxRate, fDeductRate, cRemarks, size: o - offset };
|
|
}
|
|
|
|
// ---------- routes ----------
|
|
app.get("/", (_req, res) => res.send("ABS bridge is up"));
|
|
app.get("/health", (_req, res) => {
|
|
const s = new net.Socket();
|
|
s.setTimeout(1500);
|
|
s.connect(ABS_PORT, ABS_HOST, () => { s.destroy(); res.json({ ok: true, target: `${ABS_HOST}:${ABS_PORT}` }); });
|
|
s.on("timeout", () => { s.destroy(); res.status(504).json({ ok: false, error: "TCP timeout" }); });
|
|
s.on("error", (e) => { s.destroy(); res.status(502).json({ ok: false, error: String(e) }); });
|
|
});
|
|
|
|
// ---------- ABS_POLL ----------
|
|
app.post("/abs/poll", async (req, res) => {
|
|
try {
|
|
const body = await readJsonBody(req);
|
|
const btMake = (typeof body.btMake === "string")
|
|
? body.btMake.charCodeAt(0)
|
|
: (Number.isFinite(body.btMake) ? (body.btMake|0) : 0x00);
|
|
|
|
const header = packSndHeader({ nTxnCd: ABS_POLL, nOpCd: 0, nNumRecsSent: 0, nNumRecsRqrd: 0, nTxnId: 0, cBtMake: btMake });
|
|
|
|
const reply = await withRetry(() => absRoundtrip(header, DEFAULT_TIMEOUT_MS), RETRIES, RETRY_DELAY_MS);
|
|
const hdr = parseRcvHeaderFlexible(reply.subarray(0, Math.min(reply.length, 24)));
|
|
|
|
res.json({
|
|
ok: true,
|
|
target: `${ABS_HOST}:${ABS_PORT}`,
|
|
sentHeaderHex: header.toString("hex"),
|
|
replyBytes: reply.length,
|
|
replyHexFirst64: reply.subarray(0, 64).toString("hex"),
|
|
parsedRcvHeaderRaw: hdr,
|
|
normalizedRcvHeader: { ...hdr, size: 18 },
|
|
normalizedHeaderHex: buildRcvHeader18(hdr).toString("hex"),
|
|
success: hdr.nRetCd === SUCCESS
|
|
});
|
|
} catch (e) {
|
|
res.status(502).json({ ok: false, error: String(e) });
|
|
}
|
|
});
|
|
|
|
// ---------- LOGIN ----------
|
|
app.post("/login", async (req, res) => {
|
|
try {
|
|
const body = await readJsonBody(req);
|
|
const opCard = (body.opCard ?? "").toString();
|
|
const btId = (body.btId ?? "").toString();
|
|
const usrId = (body.usrId ?? "").toString();
|
|
const plain = (body.password ?? "");
|
|
const givenEnc = (body.passwordEnc ?? "");
|
|
|
|
if (!opCard || !btId || (!plain && !givenEnc)) {
|
|
return res.status(400).json({ ok: false, error: "Missing opCard, btId, and either password or passwordEnc" });
|
|
}
|
|
|
|
let encInfo = null;
|
|
let passwd = givenEnc ? String(givenEnc) : (encInfo = encryptPasswordLikeMFC(String(plain))).enc;
|
|
|
|
const btMake = (typeof body.btMake === "string")
|
|
? body.btMake.charCodeAt(0)
|
|
: (Number.isFinite(body.btMake) ? (body.btMake|0) : 0x00);
|
|
|
|
const sndHeader = packSndHeader({ nTxnCd: LOG, nOpCd: LOGBT, nNumRecsSent: 1, nNumRecsRqrd: 1, nTxnId: 0, cBtMake: btMake });
|
|
const sndLog = packSndLog({ usrId, opCard, passwd, btId });
|
|
const sendBuf = Buffer.concat([sndHeader, sndLog]);
|
|
|
|
const reply = await withRetry(() => absRoundtrip(sendBuf, DEFAULT_TIMEOUT_MS), RETRIES, RETRY_DELAY_MS);
|
|
|
|
const rcvHeader = parseRcvHeaderFlexible(reply.subarray(0, Math.min(reply.length, 24)));
|
|
|
|
const json = {
|
|
ok: true,
|
|
target: `${ABS_HOST}:${ABS_PORT}`,
|
|
sentHeaderHex: sndHeader.toString("hex"),
|
|
sentBodyHex: sndLog.toString("hex"),
|
|
replyBytes: reply.length,
|
|
replyHexFirst64: reply.subarray(0, 64).toString("hex"),
|
|
rcvHeaderRaw: rcvHeader,
|
|
success: rcvHeader.nRetCd === SUCCESS
|
|
};
|
|
|
|
if (!givenEnc && encInfo) {
|
|
json.encryption = { used: true, utcSeconds: encInfo.utcSeconds, key: encInfo.key, encPasswd: passwd };
|
|
} else if (givenEnc) {
|
|
json.encryption = { used: false, providedPasswordEnc: true };
|
|
}
|
|
|
|
// locate login body start
|
|
let bodyOffset = rcvHeader.size;
|
|
bodyOffset = adjustForOptionalOp(reply, bodyOffset).offset;
|
|
bodyOffset = alignToAsciiYear(reply, bodyOffset);
|
|
|
|
json.offsetProbe = {
|
|
bodyOffset,
|
|
around: reply.subarray(Math.max(0, bodyOffset - 8), Math.min(reply.length, bodyOffset + 48)).toString("ascii")
|
|
};
|
|
|
|
if (json.success && reply.length >= bodyOffset + 20) {
|
|
try { json.log = parseRcvLog(reply, bodyOffset); } catch (e) { json.parseLogError = String(e); }
|
|
}
|
|
|
|
res.json(json);
|
|
} catch (e) {
|
|
res.status(502).json({ ok: false, error: String(e) });
|
|
}
|
|
});
|
|
|
|
// ---------- DOWNLOAD BT INFO (LOG/BTI) ----------
|
|
app.post("/download/btinfo", async (req, res) => {
|
|
try {
|
|
const body = await readJsonBody(req);
|
|
const opCard = (body.opCard ?? "").toString();
|
|
const btId = (body.btId ?? "").toString();
|
|
const usrId = (body.usrId ?? "").toString();
|
|
const plain = (body.password ?? "");
|
|
const encPass = (body.passwordEnc ?? "");
|
|
if (!opCard || !btId || (!plain && !encPass)) {
|
|
return res.status(400).json({ ok: false, error: "Missing opCard, btId, and either password or passwordEnc" });
|
|
}
|
|
const passwd = encPass ? String(encPass) : encryptPasswordLikeMFC(String(plain)).enc;
|
|
|
|
const sndHeader = packSndHeader({ nTxnCd: LOG, nOpCd: BTI, nNumRecsSent: 1, nNumRecsRqrd: 1, nTxnId: 0, cBtMake: 0 });
|
|
const sndLog = packSndLog({ usrId, opCard, passwd, btId });
|
|
const sendBuf = Buffer.concat([sndHeader, sndLog]);
|
|
|
|
const reply = await withRetry(() => absRoundtrip(sendBuf, DEFAULT_TIMEOUT_MS), RETRIES, RETRY_DELAY_MS);
|
|
|
|
const result = { ok: true, replyBytes: reply.length, replyHexFirst64: reply.subarray(0,64).toString('hex') };
|
|
|
|
let offset = 0;
|
|
if (remaining(reply, offset) < 18) return res.json({ ok:false, error:"truncated: no header" });
|
|
// const hdr = parseRcvHeaderFlexible(reply.subarray(offset, Math.min(reply.length, offset + 24)));
|
|
// result.primaryHeader = hdr;
|
|
// offset += hdr.size;
|
|
|
|
const hdr = parseRcvHeaderFlexible(reply.subarray(offset, Math.min(reply.length, offset + 24)));
|
|
result.primaryHeader = hdr;
|
|
|
|
// Advance to end of header *and* align to the natural 4-byte boundary
|
|
// (C structs are commonly padded so sizeof(sRcvHeader) will often be 20, not 18)
|
|
const hdrLenAligned = (hdr.size + 3) & ~3; // e.g. 18 -> 20, 24 -> 24
|
|
// safety: ensure we have at least hdrLenAligned bytes in reply
|
|
if (!safeAdvanceOrBreak(reply, 0, hdrLenAligned, result)) {
|
|
result.error = "truncated: incomplete header (after alignment)";
|
|
return res.json(result);
|
|
}
|
|
offset = hdrLenAligned;
|
|
|
|
|
|
if (hdr.nRetCd !== SUCCESS) {
|
|
result.error = `server returned nRetCd=${hdr.nRetCd}`;
|
|
return res.json(result);
|
|
}
|
|
|
|
if (!safeAdvanceOrBreak(reply, offset, 5+31+5+4+1+4+4+4+4, result)) {
|
|
result.error = "truncated before BTI master";
|
|
return res.json(result);
|
|
}
|
|
const btiMst = parseRcvBtiMst(reply, offset);
|
|
offset += btiMst.size;
|
|
result.btiMst = btiMst;
|
|
|
|
const details = [];
|
|
let readCount = 0;
|
|
while (readCount < hdr.nNumRecs) {
|
|
if (looksLikeHeaderAt(reply, offset)) break;
|
|
// if (!safeAdvanceOrBreak(reply, offset, 1+4+1, result)) break;
|
|
if (!safeAdvanceOrBreak(reply, offset, 1+3+1, result)) break;
|
|
|
|
const dt = parseRcvBtiDtl(reply, offset);
|
|
offset += dt.size;
|
|
details.push(dt);
|
|
readCount++;
|
|
}
|
|
result.btiDetails = details;
|
|
result.btiReadCount = readCount;
|
|
result.parsedBytes = offset;
|
|
|
|
res.json(result);
|
|
} catch (e) {
|
|
res.status(502).json({ ok: false, error: String(e), stack: e.stack });
|
|
}
|
|
});
|
|
|
|
// ---------- DOWNLOAD RP INFO (LOG/RPI) ----------
|
|
app.post("/download/rpinfo", async (req, res) => {
|
|
try {
|
|
const body = await readJsonBody(req);
|
|
const debug = String((req.query.debug ?? "")).toLowerCase() === "1";
|
|
const opCard = (body.opCard ?? "").toString();
|
|
const btId = (body.btId ?? "").toString();
|
|
const usrId = (body.usrId ?? "").toString();
|
|
const plain = (body.password ?? "");
|
|
const encPass = (body.passwordEnc ?? "");
|
|
if (!opCard || !btId || (!plain && !encPass)) {
|
|
return res.status(400).json({ ok: false, error: "Missing opCard, btId, and either password or passwordEnc" });
|
|
}
|
|
const passwd = encPass ? String(encPass) : encryptPasswordLikeMFC(String(plain)).enc;
|
|
|
|
const sndHeader = packSndHeader({ nTxnCd: LOG, nOpCd: RPI, nNumRecsSent: 1, nNumRecsRqrd: 0, nTxnId: 0, cBtMake: 0 });
|
|
const sndLog = packSndLog({ usrId, opCard, passwd, btId });
|
|
const sendBuf = Buffer.concat([sndHeader, sndLog]);
|
|
|
|
const reply = await withRetry(() => absRoundtrip(sendBuf, DEFAULT_TIMEOUT_MS), RETRIES, RETRY_DELAY_MS);
|
|
|
|
const result = { ok: true, replyBytes: reply.length, replyHexFirst64: reply.subarray(0,64).toString('hex') };
|
|
|
|
let offset = 0;
|
|
if (remaining(reply, offset) < 18) return res.json({ ok:false, error:"truncated: no top header" });
|
|
const topHdr = parseRcvHeaderFlexible(reply.subarray(offset, Math.min(reply.length, offset+24)));
|
|
offset += topHdr.size;
|
|
result.topHeader = topHdr;
|
|
if (topHdr.nRetCd !== SUCCESS) {
|
|
result.error = `server returned nRetCd=${topHdr.nRetCd}`;
|
|
return res.json(result);
|
|
}
|
|
if (debug) result.debug_afterTopHdr = hexSlice(reply, 0, 128);
|
|
|
|
// Helper to parse a section safely
|
|
function parseSection(minRecBytes, recParser, outArrName, outHeaderName) {
|
|
if (remaining(reply, offset) < 18) { result._truncated = true; return { header:null, items:[], read:0 }; }
|
|
offset = alignToPossibleHeader(reply, offset);
|
|
const hdr = parseRcvHeaderFlexible(reply.subarray(offset, Math.min(reply.length, offset+24)));
|
|
offset += hdr.size;
|
|
const adj = adjustForOptionalOp(reply, offset);
|
|
offset = adj.offset;
|
|
|
|
const items = [];
|
|
let read = 0;
|
|
while (read < hdr.nNumRecs) {
|
|
if (looksLikeHeaderAt(reply, offset)) break;
|
|
if (!safeAdvanceOrBreak(reply, offset, minRecBytes, result)) break;
|
|
const rec = recParser(reply, offset);
|
|
offset += rec.size;
|
|
items.push(rec);
|
|
read++;
|
|
}
|
|
result[outHeaderName] = hdr;
|
|
result[outArrName] = items;
|
|
result[outArrName.replace(/s?$/, "ReadCount")] = read;
|
|
return { header: hdr, items, read };
|
|
}
|
|
|
|
// RPI1 .. RPI4 .. PVM
|
|
parseSection(4+1+1+15+41, parseRcvRpi1, "rpi1", "rpi1Header");
|
|
if (debug) result.debug_afterRpi1 = hexSlice(reply, Math.max(0, offset-64), 128);
|
|
|
|
parseSection(4+1+1+25+4, parseRcvRpi2, "rpi2", "rpi2Header");
|
|
if (debug) result.debug_afterRpi2 = hexSlice(reply, Math.max(0, offset-64), 128);
|
|
|
|
parseSection(4+1+1+9, parseRcvRpi3, "rpi3", "rpi3Header");
|
|
if (debug) result.debug_afterRpi3 = hexSlice(reply, Math.max(0, offset-64), 128);
|
|
|
|
parseSection(4+1+3+11+1, parseRcvRpi4, "rpi4", "rpi4Header");
|
|
if (debug) result.debug_afterRpi4 = hexSlice(reply, Math.max(0, offset-64), 128);
|
|
|
|
parseSection(4+4+4+4+4+31, parseRcvPvm, "pvms", "pvmHeader");
|
|
|
|
result.parsedBytes = offset;
|
|
|
|
// Build summary
|
|
const raceCard = {};
|
|
for (const v of result.rpi1 || []) {
|
|
const key = `${v.nRaceDt}_${v.cVenueNum}`;
|
|
raceCard[key] = { date: v.nRaceDt, venueNum: v.cVenueNum, status: v.cVenueSts, races: {}, advertisement: v.cAdvertisement };
|
|
}
|
|
for (const r of result.rpi2 || []) {
|
|
const key = `${r.nRaceDt}_${r.cVenueNum}`;
|
|
const raceKey = `${r.cRaceNum}`;
|
|
if (!raceCard[key]) raceCard[key] = { date: r.nRaceDt, venueNum: r.cVenueNum, races: {} };
|
|
raceCard[key].races[raceKey] = { raceNum: r.cRaceNum, horses: (r.cHorses || "").split(/\s+/).filter(Boolean), startTime: r.nRaceStartTm, pools: [] };
|
|
}
|
|
for (const p of result.rpi3 || []) {
|
|
const key = `${p.nRaceDt}_${p.cVenueNum}`;
|
|
const raceKey = `${p.cRaceNum}`;
|
|
if (raceCard[key] && raceCard[key].races[raceKey]) raceCard[key].races[raceKey].pools = (p.cPools || "").split("").filter(Boolean);
|
|
}
|
|
for (const s of result.rpi4 || []) {
|
|
const key = `${s.nRaceDt}_${s.cVenueNum}`;
|
|
const raceKey = `${s.cRaceNum}`;
|
|
if (raceCard[key] && raceCard[key].races[raceKey]) {
|
|
raceCard[key].races[raceKey].poolStatus = s.cPoolSts;
|
|
raceCard[key].races[raceKey].selectRaceNum = s.cSelectRaceNum;
|
|
}
|
|
}
|
|
result.raceCard = raceCard;
|
|
|
|
res.json(result);
|
|
} catch (e) {
|
|
res.status(502).json({ ok: false, error: String(e), stack: e.stack });
|
|
}
|
|
});
|
|
|
|
// ---- start HTTP server ----
|
|
const HTTP_PORT = Number(process.env.HTTP_BRIDGE_PORT || 8080);
|
|
app.listen(HTTP_PORT, () => {
|
|
console.log(`ABS HTTP bridge listening on :${HTTP_PORT}`);
|
|
console.log(`Target ABS server: ${ABS_HOST}:${ABS_PORT}`);
|
|
});
|