From 70ddb2ac2112198031c80629b2f4138fae08babb Mon Sep 17 00:00:00 2001 From: Toshit Chawda Date: Sun, 8 Sep 2024 20:50:02 -0700 Subject: [PATCH] use hickory-dns resovler --- Cargo.lock | 346 ++++++++++++++++++++++++++++++++++++++++--- server/Cargo.toml | 1 + server/src/config.rs | 13 +- server/src/main.rs | 20 +++ server/src/stream.rs | 10 +- 5 files changed, 366 insertions(+), 24 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index d10e6e5..3f7727e 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -83,7 +83,7 @@ version = "1.1.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "6d36fc52c7f6c869915e99412912f22093507da8d9e942ceaf66fe4b7c14422a" dependencies = [ - "windows-sys", + "windows-sys 0.52.0", ] [[package]] @@ -93,7 +93,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "5bf74e1b6e971609db8ca7a9ce79fd5768ab6ae46441c572e46cf596f59e57f8" dependencies = [ "anstyle", - "windows-sys", + "windows-sys 0.52.0", ] [[package]] @@ -355,7 +355,7 @@ version = "4.5.13" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "501d359d5f3dcaf6ecdeee48833ae73ec6e42723a1e52419c79abf9507eec0a0" dependencies = [ - "heck", + "heck 0.5.0", "proc-macro2", "quote", "syn", @@ -478,6 +478,12 @@ dependencies = [ "parking_lot_core", ] +[[package]] +name = "data-encoding" +version = "2.6.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "e8566979429cf69b49a5c740c60791108e86440e8be149bbea4fe54d2c32d6e2" + [[package]] name = "digest" version = "0.10.7" @@ -494,6 +500,18 @@ version = "1.13.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "60b1af1c220855b6ceac025d3f6ecdd2b7c4894bfe9cd9bda4fbb4bc7c0d4cf0" +[[package]] +name = "enum-as-inner" +version = "0.6.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "5ffccbb6966c05b32ef8fbac435df276c4ae4d3dc55a8cd0eb9745e6c12f546a" +dependencies = [ + "heck 0.4.1", + "proc-macro2", + "quote", + "syn", +] + [[package]] name = "env_filter" version = "0.1.2" @@ -567,6 +585,7 @@ dependencies = [ "event-listener", "fastwebsockets", "futures-util", + "hickory-resolver", "http-body-util", "hyper", "hyper-util", @@ -602,7 +621,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "534c5cf6194dfab3db3242765c03bbe257cf92f22b38f6bc0c58d59108a820ba" dependencies = [ "libc", - "windows-sys", + "windows-sys 0.52.0", ] [[package]] @@ -663,6 +682,15 @@ version = "1.0.7" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1" +[[package]] +name = "form_urlencoded" +version = "1.2.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "e13624c2627564efccf4934284bdd98cbaa14e79b0b5a141218e507b3a823456" +dependencies = [ + "percent-encoding", +] + [[package]] name = "futures" version = "0.3.30" @@ -858,6 +886,12 @@ dependencies = [ "num-traits", ] +[[package]] +name = "heck" +version = "0.4.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8" + [[package]] name = "heck" version = "0.5.0" @@ -870,6 +904,62 @@ version = "0.3.9" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024" +[[package]] +name = "hickory-proto" +version = "0.24.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "07698b8420e2f0d6447a436ba999ec85d8fbf2a398bbd737b82cac4a2e96e512" +dependencies = [ + "async-trait", + "cfg-if", + "data-encoding", + "enum-as-inner", + "futures-channel", + "futures-io", + "futures-util", + "idna 0.4.0", + "ipnet", + "once_cell", + "rand", + "thiserror", + "tinyvec", + "tokio", + "tracing", + "url", +] + +[[package]] +name = "hickory-resolver" +version = "0.24.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "28757f23aa75c98f254cf0405e6d8c25b831b32921b050a66692427679b1f243" +dependencies = [ + "cfg-if", + "futures-util", + "hickory-proto", + "ipconfig", + "lru-cache", + "once_cell", + "parking_lot", + "rand", + "resolv-conf", + "smallvec", + "thiserror", + "tokio", + "tracing", +] + +[[package]] +name = "hostname" +version = "0.3.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "3c731c3e10504cc8ed35cfe2f1db4c9274c3d35fa486e3b31df46f068ef3e867" +dependencies = [ + "libc", + "match_cfg", + "winapi", +] + [[package]] name = "http" version = "1.1.0" @@ -992,6 +1082,26 @@ dependencies = [ "wasmtimer", ] +[[package]] +name = "idna" +version = "0.4.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "7d20d6b07bfbc108882d88ed8e37d39636dcc260e15e30c45e6ba089610b917c" +dependencies = [ + "unicode-bidi", + "unicode-normalization", +] + +[[package]] +name = "idna" +version = "0.5.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "634d9b1461af396cad843f47fdba5597a4f9e6ddd4bfb6ff5d85028c25cb12f6" +dependencies = [ + "unicode-bidi", + "unicode-normalization", +] + [[package]] name = "indexmap" version = "1.9.3" @@ -1012,6 +1122,24 @@ dependencies = [ "hashbrown 0.14.5", ] +[[package]] +name = "ipconfig" +version = "0.3.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "b58db92f96b720de98181bbbe63c831e87005ab460c1bf306eb2622b4707997f" +dependencies = [ + "socket2", + "widestring", + "windows-sys 0.48.0", + "winreg", +] + +[[package]] +name = "ipnet" +version = "2.10.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "187674a687eed5fe42285b40c6291f9a01517d415fad1c3cbc6a9f778af7fcd4" + [[package]] name = "is_terminal_polyfill" version = "1.70.1" @@ -1054,6 +1182,12 @@ version = "0.2.158" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "d8adc4bb1803a324070e64a98ae98f38934d91957a99cfb3a43dcbc01bc56439" +[[package]] +name = "linked-hash-map" +version = "0.5.6" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "0717cef1bc8b636c6e1c1bbdefc09e6322da8a9321966e8928ef80d20f7f770f" + [[package]] name = "linux-raw-sys" version = "0.4.14" @@ -1079,6 +1213,21 @@ dependencies = [ "serde", ] +[[package]] +name = "lru-cache" +version = "0.1.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "31e24f1ad8321ca0e8a1e0ac13f23cb668e6f5466c2c57319f6a5cf1cc8e3b1c" +dependencies = [ + "linked-hash-map", +] + +[[package]] +name = "match_cfg" +version = "0.1.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "ffbee8634e0d45d258acb448e7eaab3fce7a0a467395d4d9f228e3c1f01fb2e4" + [[package]] name = "matchers" version = "0.1.0" @@ -1139,7 +1288,7 @@ dependencies = [ "hermit-abi", "libc", "wasi", - "windows-sys", + "windows-sys 0.52.0", ] [[package]] @@ -1229,7 +1378,7 @@ dependencies = [ "libc", "redox_syscall", "smallvec", - "windows-targets", + "windows-targets 0.52.6", ] [[package]] @@ -1337,6 +1486,12 @@ dependencies = [ "tokio", ] +[[package]] +name = "quick-error" +version = "1.2.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "a1d01941d82fa2ab50be1e79e6714289dd7cde78eba4c074bc5a4374f650dfe0" + [[package]] name = "quote" version = "1.0.37" @@ -1429,6 +1584,16 @@ version = "0.8.4" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "7a66a03ae7c801facd77a29370b4faec201768915ac14a721ba36f20bc9c209b" +[[package]] +name = "resolv-conf" +version = "0.7.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "52e44394d2086d010551b14b53b1f24e31647570cd1deb0379e2c21b329aba00" +dependencies = [ + "hostname", + "quick-error", +] + [[package]] name = "ring" version = "0.17.8" @@ -1441,7 +1606,7 @@ dependencies = [ "libc", "spin", "untrusted", - "windows-sys", + "windows-sys 0.52.0", ] [[package]] @@ -1461,7 +1626,7 @@ dependencies = [ "itoa", "libc", "linux-raw-sys", - "windows-sys", + "windows-sys 0.52.0", ] [[package]] @@ -1692,7 +1857,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "ce305eb0b4296696835b71df73eb912e0f1ffd2556a501fcede6e0c50349191c" dependencies = [ "libc", - "windows-sys", + "windows-sys 0.52.0", ] [[package]] @@ -1800,6 +1965,21 @@ dependencies = [ "tikv-jemalloc-sys", ] +[[package]] +name = "tinyvec" +version = "1.8.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "445e881f4f6d382d5f27c034e25eb92edd7c784ceab92a0937db7f2e9471b938" +dependencies = [ + "tinyvec_macros", +] + +[[package]] +name = "tinyvec_macros" +version = "0.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20" + [[package]] name = "tokio" version = "1.40.0" @@ -1816,7 +1996,7 @@ dependencies = [ "socket2", "tokio-macros", "tracing", - "windows-sys", + "windows-sys 0.52.0", ] [[package]] @@ -2010,12 +2190,27 @@ version = "1.17.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825" +[[package]] +name = "unicode-bidi" +version = "0.3.15" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "08f95100a766bf4f8f28f90d77e0a5461bbdb219042e7679bebe79004fed8d75" + [[package]] name = "unicode-ident" version = "1.0.12" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b" +[[package]] +name = "unicode-normalization" +version = "0.1.23" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "a56d1686db2308d901306f92a263857ef59ea39678a5458e7cb17f01415101f5" +dependencies = [ + "tinyvec", +] + [[package]] name = "unsafe-libyaml" version = "0.2.11" @@ -2028,6 +2223,17 @@ version = "0.9.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1" +[[package]] +name = "url" +version = "2.5.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "22784dbdf76fdde8af1aeda5622b546b422b6fc585325248a2bf9f5e41e94d6c" +dependencies = [ + "form_urlencoded", + "idna 0.5.0", + "percent-encoding", +] + [[package]] name = "utf-8" version = "0.7.6" @@ -2199,13 +2405,65 @@ dependencies = [ "rustls-pki-types", ] +[[package]] +name = "widestring" +version = "1.1.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "7219d36b6eac893fa81e84ebe06485e7dcbb616177469b142df14f1f4deb1311" + +[[package]] +name = "winapi" +version = "0.3.9" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419" +dependencies = [ + "winapi-i686-pc-windows-gnu", + "winapi-x86_64-pc-windows-gnu", +] + +[[package]] +name = "winapi-i686-pc-windows-gnu" +version = "0.4.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6" + +[[package]] +name = "winapi-x86_64-pc-windows-gnu" +version = "0.4.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f" + +[[package]] +name = "windows-sys" +version = "0.48.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9" +dependencies = [ + "windows-targets 0.48.5", +] + [[package]] name = "windows-sys" version = "0.52.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d" dependencies = [ - "windows-targets", + "windows-targets 0.52.6", +] + +[[package]] +name = "windows-targets" +version = "0.48.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c" +dependencies = [ + "windows_aarch64_gnullvm 0.48.5", + "windows_aarch64_msvc 0.48.5", + "windows_i686_gnu 0.48.5", + "windows_i686_msvc 0.48.5", + "windows_x86_64_gnu 0.48.5", + "windows_x86_64_gnullvm 0.48.5", + "windows_x86_64_msvc 0.48.5", ] [[package]] @@ -2214,28 +2472,46 @@ version = "0.52.6" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973" dependencies = [ - "windows_aarch64_gnullvm", - "windows_aarch64_msvc", - "windows_i686_gnu", + "windows_aarch64_gnullvm 0.52.6", + "windows_aarch64_msvc 0.52.6", + "windows_i686_gnu 0.52.6", "windows_i686_gnullvm", - "windows_i686_msvc", - "windows_x86_64_gnu", - "windows_x86_64_gnullvm", - "windows_x86_64_msvc", + "windows_i686_msvc 0.52.6", + "windows_x86_64_gnu 0.52.6", + "windows_x86_64_gnullvm 0.52.6", + "windows_x86_64_msvc 0.52.6", ] +[[package]] +name = "windows_aarch64_gnullvm" +version = "0.48.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8" + [[package]] name = "windows_aarch64_gnullvm" version = "0.52.6" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3" +[[package]] +name = "windows_aarch64_msvc" +version = "0.48.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc" + [[package]] name = "windows_aarch64_msvc" version = "0.52.6" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469" +[[package]] +name = "windows_i686_gnu" +version = "0.48.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e" + [[package]] name = "windows_i686_gnu" version = "0.52.6" @@ -2248,24 +2524,48 @@ version = "0.52.6" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66" +[[package]] +name = "windows_i686_msvc" +version = "0.48.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406" + [[package]] name = "windows_i686_msvc" version = "0.52.6" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66" +[[package]] +name = "windows_x86_64_gnu" +version = "0.48.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e" + [[package]] name = "windows_x86_64_gnu" version = "0.52.6" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78" +[[package]] +name = "windows_x86_64_gnullvm" +version = "0.48.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc" + [[package]] name = "windows_x86_64_gnullvm" version = "0.52.6" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d" +[[package]] +name = "windows_x86_64_msvc" +version = "0.48.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538" + [[package]] name = "windows_x86_64_msvc" version = "0.52.6" @@ -2281,6 +2581,16 @@ dependencies = [ "memchr", ] +[[package]] +name = "winreg" +version = "0.50.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "524e57b2c537c0f9b1e69f1965311ec12182b4122e45035b1508cd24d2adadb1" +dependencies = [ + "cfg-if", + "windows-sys 0.48.0", +] + [[package]] name = "wisp-mux" version = "5.1.0" diff --git a/server/Cargo.toml b/server/Cargo.toml index 0d7fb3e..b08d655 100644 --- a/server/Cargo.toml +++ b/server/Cargo.toml @@ -14,6 +14,7 @@ env_logger = "0.11.5" event-listener = "5.3.1" fastwebsockets = { version = "0.8.0", features = ["unstable-split", "upgrade"] } futures-util = "0.3.30" +hickory-resolver = "0.24.1" http-body-util = "0.1.2" hyper = { version = "1.4.1", features = ["server", "http1"] } hyper-util = { version = "0.1.7", features = ["tokio"] } diff --git a/server/src/config.rs b/server/src/config.rs index 16c125e..7623f12 100644 --- a/server/src/config.rs +++ b/server/src/config.rs @@ -1,4 +1,4 @@ -use std::{collections::HashMap, ops::RangeInclusive, path::PathBuf}; +use std::{collections::HashMap, net::IpAddr, ops::RangeInclusive, path::PathBuf}; use cfg_if::cfg_if; use clap::{Parser, ValueEnum}; @@ -11,7 +11,7 @@ use wisp_mux::extensions::{ ProtocolExtensionBuilder, }; -use crate::{CLI, CONFIG}; +use crate::{CLI, CONFIG, RESOLVER}; #[derive(Serialize, Deserialize, Default, Debug)] #[serde(rename_all = "lowercase")] @@ -114,6 +114,9 @@ pub struct StreamConfig { #[cfg(feature = "twisp")] pub allow_twisp: bool, + /// DNS servers to resolve with. Will default to system configuration. + pub dns_servers: Vec, + /// Whether or not to allow connections to IP addresses. pub allow_direct_ip: bool, /// Whether or not to allow connections to loopback IP addresses. @@ -200,8 +203,12 @@ lazy_static! { } pub fn validate_config_cache() { + // constructs regexes let _ = CONFIG_CACHE.allowed_ports; + // constructs wisp config CONFIG.wisp.to_opts().unwrap(); + // constructs resolver + RESOLVER.clear_cache(); } impl Default for ServerConfig { @@ -274,6 +281,8 @@ impl Default for StreamConfig { #[cfg(feature = "twisp")] allow_twisp: false, + dns_servers: Vec::new(), + allow_direct_ip: true, allow_loopback: true, allow_multicast: true, diff --git a/server/src/main.rs b/server/src/main.rs index 91442e0..29dff20 100644 --- a/server/src/main.rs +++ b/server/src/main.rs @@ -6,6 +6,10 @@ use clap::Parser; use config::{validate_config_cache, Cli, Config}; use dashmap::DashMap; use handle::{handle_wisp, handle_wsproxy}; +use hickory_resolver::{ + config::{NameServerConfigGroup, ResolverConfig, ResolverOpts}, + TokioAsyncResolver, +}; use lazy_static::lazy_static; use listener::ServerListener; use log::{error, info}; @@ -32,6 +36,22 @@ lazy_static! { } }; pub static ref CLIENTS: DashMap = DashMap::new(); + pub static ref RESOLVER: TokioAsyncResolver = { + let (config, opts) = if CONFIG.stream.dns_servers.is_empty() { + hickory_resolver::system_conf::read_system_conf().unwrap() + } else { + ( + ResolverConfig::from_parts( + None, + Vec::new(), + NameServerConfigGroup::from_ips_clear(&CONFIG.stream.dns_servers, 53, true), + ), + ResolverOpts::default(), + ) + }; + + TokioAsyncResolver::tokio(config, opts) + }; } fn format_stream_type(stream_type: StreamType) -> &'static str { diff --git a/server/src/stream.rs b/server/src/stream.rs index 67ca2ff..8f79dc2 100644 --- a/server/src/stream.rs +++ b/server/src/stream.rs @@ -10,10 +10,10 @@ use fastwebsockets::{FragmentCollector, Frame, OpCode, Payload, WebSocketError}; use hyper::upgrade::Upgraded; use hyper_util::rt::TokioIo; use regex::RegexSet; -use tokio::net::{lookup_host, TcpStream, UdpSocket}; +use tokio::net::{TcpStream, UdpSocket}; use wisp_mux::{ConnectPacket, StreamType}; -use crate::CONFIG; +use crate::{CONFIG, RESOLVER}; fn match_addr(str: &str, allowed: &RegexSet, blocked: &RegexSet) -> bool { blocked.is_match(str) && !allowed.is_match(str) @@ -125,13 +125,15 @@ impl ClientStream { return Ok(ResolvedPacket::Blocked); } - let packet = lookup_host(packet.destination_hostname + ":0") + let packet = RESOLVER + .lookup_ip(packet.destination_hostname) .await .context("failed to resolve hostname")? + .iter() .filter(|x| CONFIG.server.resolve_ipv6 || x.is_ipv4()) .map(|x| ConnectPacket { stream_type: packet.stream_type, - destination_hostname: x.ip().to_string(), + destination_hostname: x.to_string(), destination_port: packet.destination_port, }) .next();