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add ip_lookup_strategy config option for hickory resolver

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Signed-off-by: strawberry <strawberry@puppygock.gay>
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strawberry 2024-04-29 14:25:11 -04:00 committed by June
parent 3f8407dd64
commit 668a7645e9
3 changed files with 26 additions and 0 deletions
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15
conduwuit-example.toml
View file

@ -514,6 +514,21 @@ allow_profile_lookup_federation_requests = true
# The default is to query one nameserver and stop (false). # The default is to query one nameserver and stop (false).
#query_all_nameservers = true #query_all_nameservers = true
# DNS A/AAAA record lookup strategy
#
# Takes a number of one of the following options:
# 1 - Ipv4Only (Only query for A records, no AAAA/IPv6)
# 2 - Ipv6Only (Only query for AAAA records, no A/IPv4)
# 3 - Ipv4AndIpv6 (Query for A and AAAA records in parallel, uses whatever returns a successful response first)
# 4 - Ipv6thenIpv4 (Query for AAAA record, if that fails then query the A record)
# 5 - Ipv4thenIpv6 (Query for A record, if that fails then query the AAAA record)
#
# If you don't have IPv6 networking, then for better performance it may be suitable to set this to Ipv4Only (1) as
# you will never ever use the AAAA record contents even if the AAAA record is successful instead of the A record.
#
# Defaults to 5 - Ipv4ThenIpv6 as this is the most compatible and IPv4 networking is currently the most prevalent.
#ip_lookup_strategy = 5
### Request Timeouts, Connection Timeouts, and Connection Pooling ### Request Timeouts, Connection Timeouts, and Connection Pooling

4
src/config/mod.rs
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@ -103,6 +103,8 @@ pub(crate) struct Config {
pub(crate) dns_tcp_fallback: bool, pub(crate) dns_tcp_fallback: bool,
#[serde(default = "true_fn")] #[serde(default = "true_fn")]
pub(crate) query_all_nameservers: bool, pub(crate) query_all_nameservers: bool,
#[serde(default = "default_ip_lookup_strategy")]
pub(crate) ip_lookup_strategy: u8,
#[serde(default = "default_max_request_size")] #[serde(default = "default_max_request_size")]
pub(crate) max_request_size: u32, pub(crate) max_request_size: u32,
@ -902,6 +904,8 @@ fn default_dns_attempts() -> u16 { 10 }
fn default_dns_timeout() -> u64 { 10 } fn default_dns_timeout() -> u64 { 10 }
fn default_ip_lookup_strategy() -> u8 { 5 }
fn default_max_request_size() -> u32 { fn default_max_request_size() -> u32 {
20 * 1024 * 1024 // Default to 20 MB 20 * 1024 * 1024 // Default to 20 MB
} }

7
src/service/globals/resolver.rs
View file

@ -67,6 +67,13 @@ impl Resolver {
opts.num_concurrent_reqs = 1; opts.num_concurrent_reqs = 1;
opts.shuffle_dns_servers = true; opts.shuffle_dns_servers = true;
opts.rotate = true; opts.rotate = true;
opts.ip_strategy = match config.ip_lookup_strategy {
1 => hickory_resolver::config::LookupIpStrategy::Ipv4Only,
2 => hickory_resolver::config::LookupIpStrategy::Ipv6Only,
3 => hickory_resolver::config::LookupIpStrategy::Ipv4AndIpv6,
4 => hickory_resolver::config::LookupIpStrategy::Ipv6thenIpv4,
_ => hickory_resolver::config::LookupIpStrategy::Ipv4thenIpv6,
};
let resolver = Arc::new(TokioAsyncResolver::tokio(conf, opts)); let resolver = Arc::new(TokioAsyncResolver::tokio(conf, opts));
let overrides = Arc::new(StdRwLock::new(TlsNameMap::new())); let overrides = Arc::new(StdRwLock::new(TlsNameMap::new()));