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fix: add IPv6 bootstrap DNS servers for IPv6-only uplinks #24

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Merged
Itsusinn merged 1 commit into from
Jun 15, 2026
Merged

fix: add IPv6 bootstrap DNS servers for IPv6-only uplinks #24

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41 changes: 37 additions & 4 deletions uniffi/clash-android-ffi/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@ static GLOBAL: tikv_jemallocator::Jemalloc = tikv_jemallocator::Jemalloc;
#[global_allocator]
static GLOBAL: ::mimalloc::MiMalloc = ::mimalloc::MiMalloc;

use std::net::{IpAddr, Ipv4Addr, SocketAddr};
use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr};
use std::path::PathBuf;
use std::sync::{Arc, Once};

Expand Down Expand Up @@ -215,24 +215,57 @@ async fn run_clash(

config.general.ipv6 = over.ipv6;
let default_nameserver = if config.dns.default_nameserver.is_empty() {
// Bootstrap nameservers. These are built with no parent resolver, so the
// host must be a literal IP (a `Host::Domain` would hit the resolve path
// and fail). The IPv6 servers let resolution work on IPv6-only uplinks
// (e.g. 464XLAT cellular), where the interface has no IPv4 address and the
// IPv4 servers are unreachable.
vec![
NameServer {
net: DNSNetMode::Udp,
host: Host::Domain("223.5.5.5".to_string()),
host: Host::Ipv4(Ipv4Addr::new(223, 5, 5, 5)), // AliDNS
port: 53,
interface: None,
proxy: None,
},
NameServer {
net: DNSNetMode::Udp,
host: Host::Domain("223.6.6.6".to_string()),
host: Host::Ipv4(Ipv4Addr::new(223, 6, 6, 6)), // AliDNS
port: 53,
interface: None,
proxy: None,
},
NameServer {
net: DNSNetMode::Udp,
host: Host::Domain("8.8.8.8".to_string()),
host: Host::Ipv4(Ipv4Addr::new(8, 8, 8, 8)), // Google
port: 53,
interface: None,
proxy: None,
},
NameServer {
net: DNSNetMode::Udp,
// AliDNS public IPv6
host: Host::Ipv6(Ipv6Addr::new(0x2400, 0x3200, 0, 0, 0, 0, 0, 1)),
port: 53,
interface: None,
proxy: None,
},
NameServer {
net: DNSNetMode::Udp,
// AliDNS public IPv6
host: Host::Ipv6(Ipv6Addr::new(
0x2400, 0x3200, 0xbaba, 0, 0, 0, 0, 1,
)),
port: 53,
interface: None,
proxy: None,
},
NameServer {
net: DNSNetMode::Udp,
// Google public IPv6
host: Host::Ipv6(Ipv6Addr::new(
0x2001, 0x4860, 0x4860, 0, 0, 0, 0, 0x8888,
)),
port: 53,
interface: None,
proxy: None,
Expand Down
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