621 lines
21 KiB
Ucode
621 lines
21 KiB
Ucode
#!/usr/bin/env ucode
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let fs = require("fs");
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let common = require("core.common");
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let uci_core = require("core.uci");
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let as_string = common.as_string;
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let read_json_file = common.read_json_file;
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let write_json_file = common.write_json_file;
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let command_output_from_args = common.command_output_from_args;
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let command_status_from_args = common.command_status_from_args;
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let command_success_from_args = common.command_success_from_args;
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let shell_quote = common.shell_quote;
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let object_or_empty = common.object_or_empty;
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let array_or_empty = common.array_or_empty;
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let option = common.option;
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let list_option = common.list_option;
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const CONFIG_NAME = getenv("TACHYON_CONFIG_NAME") || "tachyon";
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const LIB_DIR = getenv("TACHYON_LIB") || "/usr/lib/tachyon";
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const STATE_DIR = getenv("TACHYON_UI_STATE_DIR") || "/var/run/tachyon";
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const BENCHMARK_STATE_FILE = STATE_DIR + "/dns-benchmark-state.json";
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const BENCHMARK_PID_FILE = STATE_DIR + "/dns-benchmark.pid";
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const SERVICE_INIT = getenv("TACHYON_SERVICE_INIT") || "/etc/init.d/tachyon";
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const CANDIDATE_SERVERS = [
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// --- Yandex DNS ---
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{ id: "yandex_udp", provider: "Yandex", type: "udp", address: "77.88.8.8", ip: "77.88.8.8", tag: "Primary" },
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{ id: "yandex_udp2", provider: "Yandex", type: "udp", address: "77.88.8.1", ip: "77.88.8.1", tag: "Secondary" },
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// --- Cloudflare DNS ---
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{ id: "cloudflare_udp", provider: "Cloudflare", type: "udp", address: "1.1.1.1", ip: "1.1.1.1", tag: "Primary" },
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{ id: "cloudflare_udp2", provider: "Cloudflare", type: "udp", address: "1.0.0.1", ip: "1.0.0.1", tag: "Secondary" },
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{ id: "cloudflare_doh", provider: "Cloudflare", type: "doh", address: "https://cloudflare-dns.com/dns-query", ip: "1.1.1.1", tag: "DoH Encrypted" },
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// --- Google Public DNS ---
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{ id: "google_udp", provider: "Google", type: "udp", address: "8.8.8.8", ip: "8.8.8.8", tag: "Primary" },
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{ id: "google_udp2", provider: "Google", type: "udp", address: "8.8.4.4", ip: "8.8.4.4", tag: "Secondary" },
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{ id: "google_doh", provider: "Google", type: "doh", address: "https://dns.google/dns-query", ip: "8.8.8.8", tag: "DoH Encrypted" },
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// --- AdGuard DNS ---
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{ id: "adguard_udp", provider: "AdGuard", type: "udp", address: "94.140.14.14", ip: "94.140.14.14", tag: "Default" },
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{ id: "adguard_doh", provider: "AdGuard", type: "doh", address: "https://dns.adguard-dns.com/dns-query", ip: "94.140.14.14", tag: "DoH Encrypted" },
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// --- Comss.one DNS ---
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{ id: "comss_udp", provider: "Comss.one", type: "udp", address: "92.223.109.31", ip: "92.223.109.31", tag: "Anti-Censorship" },
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{ id: "comss_doh", provider: "Comss.one", type: "doh", address: "https://dns.comss.one/dns-query", ip: "92.223.109.31", tag: "DoH Anti-Censorship" },
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// --- Control D ---
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{ id: "controld_udp", provider: "Control D", type: "udp", address: "76.76.2.0", ip: "76.76.2.0", tag: "Unfiltered" },
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{ id: "controld_doh", provider: "Control D", type: "doh", address: "https://freedns.controld.com/p0", ip: "76.76.2.0", tag: "DoH Encrypted" },
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// --- Quad9 ---
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{ id: "quad9_udp", provider: "Quad9", type: "udp", address: "9.9.9.9", ip: "9.9.9.9", tag: "Primary" },
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// --- Mullvad DNS ---
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{ id: "mullvad_udp", provider: "Mullvad", type: "udp", address: "194.242.2.2", ip: "194.242.2.2", tag: "Privacy" }
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];
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const TEST_DOMAINS = [
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"google.com",
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"yandex.ru",
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"cloudflare.com",
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"wikipedia.org"
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];
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function now_seconds() {
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let stamp = clock();
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return stamp ? stamp[0] : 0;
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}
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function has_tool(name) {
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let out = command_output_from_args([ "which", as_string(name) ]);
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return length(out) > 0;
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}
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function url_host(url) {
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let m = match(as_string(url), /^https?:\/\/([^\/:]+)/);
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return m ? m[1] : "";
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}
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function domain_to_doh_b64(domain) {
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domain = trim(as_string(domain));
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if (domain == "google.com") return "AAABAAABAAAAAAAABmdvb2dsZQNjb20AAAEAAQ";
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if (domain == "cloudflare.com") return "AAABAAABAAAAAAAACmNsb3VkZmxhcmUDY29tAAABAAE";
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if (domain == "wikipedia.org") return "AAABAAABAAAAAAAACXdpa2lwZWRpYQNvcmcAAAEAAQ";
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if (domain == "yandex.ru") return "AAABAAABAAAAAAAABnlhbmRleAJydQAAAQAB";
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if (domain == "example.com") return "AAABAAABAAAAAAAAB2V4YW1wbGUDY29tAAABAAE";
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let labels = split(replace(domain, /^\.+|\.+$/, ""), ".");
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let bytes = [ 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0 ];
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for (let label in labels) {
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if (label == "") continue;
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push(bytes, length(label));
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for (let i = 0; i < length(label); i++)
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push(bytes, ord(label, i));
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}
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push(bytes, 0, 0, 1, 0, 1);
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let b64chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
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let res = "";
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let i = 0;
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while (i < length(bytes)) {
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let b0 = bytes[i];
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let b1 = i + 1 < length(bytes) ? bytes[i + 1] : 0;
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let b2 = i + 2 < length(bytes) ? bytes[i + 2] : 0;
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let c0 = (b0 >> 2) & 0x3f;
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let c1 = (((b0 & 0x03) << 4) | ((b1 >> 4) & 0x0f)) & 0x3f;
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let c2 = (((b1 & 0x0f) << 2) | ((b2 >> 6) & 0x03)) & 0x3f;
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let c3 = b2 & 0x3f;
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res += substr(b64chars, c0, 1);
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res += substr(b64chars, c1, 1);
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if (i + 1 < length(bytes))
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res += substr(b64chars, c2, 1);
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if (i + 2 < length(bytes))
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res += substr(b64chars, c3, 1);
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i += 3;
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}
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return res;
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}
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// Probes a UDP DNS server with `dig` (primary) or `nslookup` (fallback).
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// Returns latency in milliseconds, or -1 on failure.
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function probe_udp(server_ip, domain) {
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server_ip = as_string(server_ip);
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domain = as_string(domain);
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if (has_tool("dig")) {
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let output = command_output_from_args([
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"dig", "@" + server_ip, domain, "A", "+time=2", "+tries=1", "+stats"
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]);
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if (length(output) > 0) {
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// Check for valid response status
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if (index(output, "status: NOERROR") >= 0 || index(output, "status: NXDOMAIN") >= 0) {
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let m = match(output, /;; Query time:[ \t]+([0-9]+)[ \t]+msec/);
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if (m && m[1] != null) {
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let ms = int(m[1]);
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return ms >= 0 ? ms : 0;
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}
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}
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}
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}
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// Fallback using nslookup & timestamp
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let t0 = clock();
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let status = command_status_from_args([ "nslookup", domain, server_ip ]);
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let t1 = clock();
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if (status == 0 && t0 && t1) {
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let elapsed_ms = (t1[0] - t0[0]) * 1000 + int((t1[1] - t0[1]) / 1000000);
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return elapsed_ms >= 0 ? elapsed_ms : 0;
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}
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return -1;
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}
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// Probes a DoH DNS server using `curl` with standard RFC 8484 DNS wireformat and direct IP resolving.
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// Returns latency in milliseconds, or -1 on failure.
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function probe_doh(server, domain) {
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let doh_url = as_string(type(server) == "object" ? server.address : server);
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domain = as_string(domain);
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let ip = as_string(type(server) == "object" ? (server.ip || "") : "");
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let host = url_host(doh_url);
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let b64 = domain_to_doh_b64(domain);
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let query_url = doh_url + (index(doh_url, "?") >= 0 ? "&" : "?") + "dns=" + b64;
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let args = [
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"curl", "-s", "-k", "-m", "3", "-w", "\n%{http_code} %{time_total}",
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"-H", "accept: application/dns-message, application/dns-json"
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];
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// Directly resolve host to the provider IP to test DoH over direct UDP bootstrap without local DNS dependency
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if (host != "" && ip != "") {
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push(args, "--resolve", host + ":443:" + ip);
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push(args, "--resolve", host + ":80:" + ip);
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}
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push(args, query_url);
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let output = command_output_from_args(args);
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if (length(output) > 0) {
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let lines = split(output, "\n");
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let last_line = length(lines) > 0 ? lines[length(lines) - 1] : "";
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if (last_line == "" && length(lines) > 1)
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last_line = lines[length(lines) - 2];
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let m = match(last_line, /^([0-9]{3})[ \t]+([0-9.]+)/);
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if (m && m[1] == "200" && m[2] != null) {
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let total_sec = double(m[2]);
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let ms = int(total_sec * 1000);
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return ms >= 0 ? ms : 0;
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}
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}
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return -1;
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}
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function probe_server(server, domain) {
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if (server.type == "doh")
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return probe_doh(server, domain);
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return probe_udp(server.ip || server.address, domain);
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}
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function test_candidate(server, domains) {
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domains = array_or_empty(domains);
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let total_ms = 0;
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let success_count = 0;
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let total_rounds = length(domains);
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for (let domain in domains) {
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let ms = probe_server(server, domain);
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if (ms >= 0) {
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total_ms += ms;
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success_count++;
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}
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}
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let result = {
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id: server.id,
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provider: server.provider,
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type: server.type,
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address: server.address,
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ip: server.ip,
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tag: server.tag,
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latency: -1,
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lossPct: 100,
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status: "failed",
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score: 99999
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};
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if (success_count > 0) {
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let avg_latency = int(total_ms / success_count);
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let loss_pct = int(((total_rounds - success_count) * 100) / total_rounds);
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let score = avg_latency + (loss_pct * 5);
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result.latency = avg_latency;
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result.lossPct = loss_pct;
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result.score = score;
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if (avg_latency < 35 && loss_pct == 0)
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result.status = "excellent";
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else if (avg_latency < 75 && loss_pct <= 25)
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result.status = "good";
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else if (avg_latency < 150 && loss_pct <= 50)
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result.status = "fair";
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else if (loss_pct < 100)
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result.status = "slow";
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else
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result.status = "failed";
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}
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return result;
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}
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function compute_recommendation(results) {
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results = array_or_empty(results);
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let working = [];
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for (let r in results) {
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if (r.latency >= 0 && r.status != "failed")
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push(working, r);
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}
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// Default failsafe recommendation
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if (length(working) == 0) {
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return {
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dns_type: "udp",
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dns_server: [ "77.88.8.8" ],
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bootstrap_dns_server: [ "77.88.8.8" ],
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dns_fallback_server: [ "1.1.1.1" ],
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dns_upstream_mode: "sequential",
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reason: "All probed DNS servers timed out or failed. Applied safe Yandex & Cloudflare defaults."
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};
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}
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// Find fastest UDP and fastest DoH
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let fastest_udp = null;
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let second_udp = null;
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let fastest_doh = null;
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for (let r in working) {
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if (r.type == "udp") {
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if (fastest_udp == null)
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fastest_udp = r;
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else if (second_udp == null && r.provider != fastest_udp.provider)
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second_udp = r;
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} else if (r.type == "doh") {
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if (fastest_doh == null)
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fastest_doh = r;
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}
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}
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if (fastest_udp == null && length(working) > 0)
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fastest_udp = working[0];
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if (second_udp == null) {
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for (let r in working) {
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if (r.type == "udp" && r.id != fastest_udp.id) {
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second_udp = r;
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break;
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}
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}
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}
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if (second_udp == null)
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second_udp = { address: "1.1.1.1", ip: "1.1.1.1", provider: "Cloudflare" };
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// Choose Primary DNS:
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// Prefer DoH if latency is good (< 85ms and <= 1.6x of fastest UDP) for security & anti-hijacking
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let selected_type = "udp";
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let selected_dns_server = [ fastest_udp.address ];
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let reason = "Selected fastest UDP server (" + fastest_udp.provider + " " + fastest_udp.latency + "ms)";
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if (fastest_doh != null && fastest_doh.latency <= 85) {
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let udp_lat = fastest_udp ? fastest_udp.latency : 100;
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if (fastest_doh.latency <= (udp_lat * 1.6) + 15) {
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selected_type = "doh";
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selected_dns_server = [ fastest_doh.address ];
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reason = "Selected fast encrypted DoH (" + fastest_doh.provider + " " + fastest_doh.latency + "ms) for maximum privacy and anti-censorship";
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}
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}
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let bootstrap_ip = fastest_udp.ip || fastest_udp.address || "77.88.8.8";
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let fallback_ip = second_udp.ip || second_udp.address || "1.1.1.1";
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let upstream_mode = "sequential";
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if (fastest_udp.latency < 50 && second_udp.latency < 60)
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upstream_mode = "parallel";
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return {
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dns_type: selected_type,
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dns_server: selected_dns_server,
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bootstrap_dns_server: [ bootstrap_ip ],
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dns_fallback_server: [ fallback_ip ],
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dns_upstream_mode: upstream_mode,
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reason: reason
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};
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}
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function run_benchmark(on_progress) {
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let results = [];
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let total = length(CANDIDATE_SERVERS);
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for (let i = 0; i < total; i++) {
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let server = CANDIDATE_SERVERS[i];
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if (on_progress)
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on_progress(i, total, server.provider + " (" + server.type + ")", null);
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let res = test_candidate(server, TEST_DOMAINS);
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push(results, res);
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if (on_progress)
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on_progress(i + 1, total, server.provider + " (" + server.type + ")", res);
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}
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// Sort by score ascending (lowest score is best)
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results = sort(results, function(a, b) {
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return a.score - b.score;
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});
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let recommendation = compute_recommendation(results);
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return {
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results: results,
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recommendation: recommendation
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};
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}
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function apply_recommendation(rec) {
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if (!rec || type(rec) != "object")
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return false;
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let cursor = uci_core.cursor();
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if (!cursor)
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return false;
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if (rec.dns_type)
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cursor.set(CONFIG_NAME, "settings", "dns_type", as_string(rec.dns_type));
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if (rec.dns_server)
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cursor.set(CONFIG_NAME, "settings", "dns_server", rec.dns_server);
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if (rec.bootstrap_dns_server)
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cursor.set(CONFIG_NAME, "settings", "bootstrap_dns_server", rec.bootstrap_dns_server);
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if (rec.dns_fallback_server)
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cursor.set(CONFIG_NAME, "settings", "dns_fallback_server", rec.dns_fallback_server);
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if (rec.dns_upstream_mode)
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cursor.set(CONFIG_NAME, "settings", "dns_upstream_mode", as_string(rec.dns_upstream_mode));
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cursor.commit(CONFIG_NAME);
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// Restart tachyon service to apply immediately
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command_success_from_args([ SERVICE_INIT, "restart" ]);
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return true;
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}
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// --- CLI Output Helpers ---
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function print_cli_table(benchmark_data) {
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let results = benchmark_data.results;
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let rec = benchmark_data.recommendation;
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print("\n========================================================================================\n");
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print(" TACHYON DNS BENCHMARK RESULTS \n");
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print("========================================================================================\n");
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printf("%-14s | %-6s | %-42s | %-8s | %-6s | %-10s\n", "Provider", "Type", "Address", "Latency", "Loss", "Rating");
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print("----------------------------------------------------------------------------------------\n");
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for (let r in results) {
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let lat_str = r.latency >= 0 ? sprintf("%d ms", r.latency) : "TIMEOUT";
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let loss_str = sprintf("%d%%", r.lossPct);
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let rating = r.status == "excellent" ? "EXCELLENT" :
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r.status == "good" ? "GOOD" :
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r.status == "fair" ? "FAIR" :
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r.status == "slow" ? "SLOW" : "FAILED";
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printf("%-14s | %-6s | %-42s | %-8s | %-6s | %-10s\n",
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substr(r.provider, 0, 14),
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r.type,
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substr(r.address, 0, 42),
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lat_str,
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loss_str,
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rating
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);
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}
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print("========================================================================================\n\n");
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print("⚡ RECOMMENDED TACHYON DNS CONFIGURATION:\n");
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print(" • DNS Type: ", rec.dns_type, "\n");
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print(" • Primary DNS: ", join(", ", rec.dns_server), "\n");
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print(" • Bootstrap DNS: ", join(", ", rec.bootstrap_dns_server), "\n");
|
|
print(" • Fallback DNS: ", join(", ", rec.dns_fallback_server), "\n");
|
|
print(" • Upstream Mode: ", rec.dns_upstream_mode, "\n");
|
|
print(" • Analysis: ", rec.reason, "\n\n");
|
|
}
|
|
|
|
// --- Background / UI Async Engine ---
|
|
|
|
function write_state(state) {
|
|
command_success_from_args([ "mkdir", "-p", STATE_DIR ]);
|
|
return write_json_file(BENCHMARK_STATE_FILE, state);
|
|
}
|
|
|
|
function read_state() {
|
|
let data = read_json_file(BENCHMARK_STATE_FILE);
|
|
return type(data) == "object" ? data : null;
|
|
}
|
|
|
|
function start_async() {
|
|
let existing = read_state();
|
|
if (existing && existing.running === true) {
|
|
let age = now_seconds() - (existing.started_at || 0);
|
|
if (age < 90) {
|
|
print(sprintf("%J\n", { success: true, message: "DNS benchmark is already running", state: existing }));
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
let initial_state = {
|
|
running: true,
|
|
progress: 0,
|
|
current_server: "Starting benchmark...",
|
|
results: [],
|
|
recommendation: null,
|
|
error: null,
|
|
started_at: now_seconds(),
|
|
finished_at: null
|
|
};
|
|
write_state(initial_state);
|
|
|
|
// Fork async background worker
|
|
let worker_cmd = sprintf("TACHYON_LIB=%s ucode -L %s %s/dns/benchmark.uc worker >/dev/null 2>&1 & echo $!",
|
|
shell_quote(LIB_DIR), shell_quote(LIB_DIR), LIB_DIR);
|
|
|
|
let pipe = fs.popen(worker_cmd, "r");
|
|
if (pipe) {
|
|
let pid = trim(as_string(pipe.read("all")));
|
|
pipe.close();
|
|
if (pid != "")
|
|
fs.writefile(BENCHMARK_PID_FILE, pid);
|
|
}
|
|
|
|
print(sprintf("%J\n", { success: true, message: "DNS benchmark started", running: true }));
|
|
return 0;
|
|
}
|
|
|
|
function run_worker() {
|
|
let state = {
|
|
running: true,
|
|
progress: 0,
|
|
current_server: "Initializing...",
|
|
results: [],
|
|
recommendation: null,
|
|
error: null,
|
|
started_at: now_seconds(),
|
|
finished_at: null
|
|
};
|
|
write_state(state);
|
|
|
|
let benchmark_data = run_benchmark(function(completed, total, current_name, latest_result) {
|
|
state.progress = int((completed * 100) / total);
|
|
state.current_server = current_name;
|
|
if (latest_result)
|
|
push(state.results, latest_result);
|
|
write_state(state);
|
|
});
|
|
|
|
state.running = false;
|
|
state.progress = 100;
|
|
state.current_server = "Completed";
|
|
state.results = benchmark_data.results;
|
|
state.recommendation = benchmark_data.recommendation;
|
|
state.finished_at = now_seconds();
|
|
write_state(state);
|
|
|
|
try { fs.unlink(BENCHMARK_PID_FILE); } catch(e) {}
|
|
return 0;
|
|
}
|
|
|
|
function stop_benchmark() {
|
|
let pid_str = fs.readfile(BENCHMARK_PID_FILE);
|
|
if (pid_str) {
|
|
let pid = int(trim(as_string(pid_str)));
|
|
if (pid > 0)
|
|
command_status_from_args([ "kill", "-9", as_string(pid) ]);
|
|
try { fs.unlink(BENCHMARK_PID_FILE); } catch(e) {}
|
|
}
|
|
|
|
let state = read_state() || {};
|
|
state.running = false;
|
|
state.error = "Benchmark stopped by user";
|
|
state.finished_at = now_seconds();
|
|
write_state(state);
|
|
|
|
print(sprintf("%J\n", { success: true, message: "Benchmark stopped" }));
|
|
return 0;
|
|
}
|
|
|
|
function get_status() {
|
|
let state = read_state();
|
|
if (!state) {
|
|
state = {
|
|
running: false,
|
|
progress: 0,
|
|
current_server: "",
|
|
results: [],
|
|
recommendation: null,
|
|
error: null,
|
|
started_at: 0,
|
|
finished_at: null
|
|
};
|
|
}
|
|
print(sprintf("%J\n", state));
|
|
return 0;
|
|
}
|
|
|
|
function apply_from_state() {
|
|
let state = read_state();
|
|
if (!state || !state.recommendation) {
|
|
print(sprintf("%J\n", { success: false, error: "No benchmark recommendation available to apply" }));
|
|
return 1;
|
|
}
|
|
|
|
let ok = apply_recommendation(state.recommendation);
|
|
if (ok)
|
|
print(sprintf("%J\n", { success: true, message: "Recommended DNS configuration applied and service restarted", recommendation: state.recommendation }));
|
|
else
|
|
print(sprintf("%J\n", { success: false, error: "Failed to apply DNS configuration to UCI" }));
|
|
return ok ? 0 : 1;
|
|
}
|
|
|
|
// --- CLI Dispatcher ---
|
|
|
|
let mode = ARGV[0] || "";
|
|
|
|
if (mode == "benchmark") {
|
|
let json_mode = (ARGV[1] == "--json");
|
|
let data = run_benchmark(null);
|
|
if (json_mode)
|
|
print(sprintf("%J\n", data));
|
|
else
|
|
print_cli_table(data);
|
|
exit(0);
|
|
}
|
|
else if (mode == "autotune") {
|
|
let apply_flag = (ARGV[1] == "--apply" || ARGV[1] == "-a");
|
|
let data = run_benchmark(null);
|
|
print_cli_table(data);
|
|
if (apply_flag) {
|
|
print("Applying recommended DNS configuration...\n");
|
|
if (apply_recommendation(data.recommendation))
|
|
print("✓ Settings saved to /etc/config/tachyon and service restarted successfully.\n");
|
|
else
|
|
print("✗ Failed to apply settings.\n");
|
|
} else {
|
|
print("Tip: Run `tachyon dns_autotune --apply` to automatically save and activate these settings.\n");
|
|
}
|
|
exit(0);
|
|
}
|
|
else if (mode == "benchmark_async" || mode == "benchmark-async") {
|
|
exit(start_async());
|
|
}
|
|
else if (mode == "worker") {
|
|
exit(run_worker());
|
|
}
|
|
else if (mode == "benchmark_status" || mode == "benchmark-status") {
|
|
exit(get_status());
|
|
}
|
|
else if (mode == "benchmark_stop" || mode == "benchmark-stop") {
|
|
exit(stop_benchmark());
|
|
}
|
|
else if (mode == "benchmark_apply" || mode == "benchmark-apply") {
|
|
exit(apply_from_state());
|
|
}
|
|
|
|
return {
|
|
CANDIDATE_SERVERS,
|
|
TEST_DOMAINS,
|
|
probe_udp,
|
|
probe_doh,
|
|
test_candidate,
|
|
compute_recommendation,
|
|
run_benchmark,
|
|
apply_recommendation
|
|
};
|