mirror of
https://github.com/ipfs/kubo.git
synced 2026-02-22 02:47:48 +08:00
7de7af0820
* feat(dns): resolve libp2p.direct addresses locally without network I/O p2p-forge hostnames encode IP addresses directly (e.g., 1-2-3-4.peerID.libp2p.direct -> 1.2.3.4), so DNS queries are wasteful. kubo now parses these IPs in-memory. - applies to both default libp2p.direct and custom AutoTLS.DomainSuffix - TXT queries still delegate to network for ACME DNS-01 compatibility - https://github.com/ipfs/kubo/pull/11140#discussion_r2683477754 use fallback to network DNS instead of returning errors when local parsing fails, ensuring forward compatibility with future DNS records - https://github.com/ipfs/kubo/pull/11140#discussion_r2683512408 add peerID validation using peer.Decode(), matching libp2p.direct server behavior, with fallback on invalid peerID - https://github.com/ipfs/kubo/pull/11140#discussion_r2683521930 document interaction with DNS.Resolvers in config.md - https://github.com/ipfs/kubo/pull/11140#discussion_r2683526647 add AutoTLS.SkipDNSLookup config flag to disable local resolution (useful for debugging or custom DNS override scenarios) - https://github.com/ipfs/kubo/pull/11140#discussion_r2683533462 add E2E test verifying libp2p.direct resolves locally even when DNS.Resolvers points to a broken server additional improvements: - use madns.BasicResolver interface instead of custom basicResolver - add compile-time interface checks for p2pForgeResolver and madns.Resolver - refactor tests: merge IPv4/IPv6, add helpers, use config.DefaultDomainSuffix - improve changelog to explain public good benefit (reducing DNS load) Fixes #11136
57 lines
2.1 KiB
Go
57 lines
2.1 KiB
Go
package node
|
|
|
|
import (
|
|
"math"
|
|
"time"
|
|
|
|
"github.com/ipfs/boxo/gateway"
|
|
config "github.com/ipfs/kubo/config"
|
|
doh "github.com/libp2p/go-doh-resolver"
|
|
madns "github.com/multiformats/go-multiaddr-dns"
|
|
)
|
|
|
|
// Compile-time interface check: *madns.Resolver (returned by gateway.NewDNSResolver
|
|
// and madns.NewResolver) must implement madns.BasicResolver for p2pForgeResolver fallback.
|
|
var _ madns.BasicResolver = (*madns.Resolver)(nil)
|
|
|
|
func DNSResolver(cfg *config.Config) (*madns.Resolver, error) {
|
|
var dohOpts []doh.Option
|
|
if !cfg.DNS.MaxCacheTTL.IsDefault() {
|
|
dohOpts = append(dohOpts, doh.WithMaxCacheTTL(cfg.DNS.MaxCacheTTL.WithDefault(time.Duration(math.MaxUint32)*time.Second)))
|
|
}
|
|
|
|
// Replace "auto" DNS resolver placeholders with autoconf values
|
|
resolvers := cfg.DNSResolversWithAutoConf()
|
|
|
|
// Get base resolver from boxo (handles custom DoH resolvers per eTLD)
|
|
baseResolver, err := gateway.NewDNSResolver(resolvers, dohOpts...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Check if we should skip network DNS lookups for p2p-forge domains
|
|
skipAutoTLSDNS := cfg.AutoTLS.SkipDNSLookup.WithDefault(config.DefaultAutoTLSSkipDNSLookup)
|
|
if !skipAutoTLSDNS {
|
|
// Local resolution disabled, use network DNS for everything
|
|
return baseResolver, nil
|
|
}
|
|
|
|
// Build list of p2p-forge domains to resolve locally without network I/O.
|
|
// AutoTLS hostnames encode IP addresses directly (e.g., 1-2-3-4.peerID.libp2p.direct),
|
|
// so DNS lookups are wasteful. We resolve these in-memory when possible.
|
|
forgeDomains := []string{config.DefaultDomainSuffix}
|
|
customDomain := cfg.AutoTLS.DomainSuffix.WithDefault(config.DefaultDomainSuffix)
|
|
if customDomain != config.DefaultDomainSuffix {
|
|
forgeDomains = append(forgeDomains, customDomain)
|
|
}
|
|
forgeResolver := NewP2PForgeResolver(forgeDomains, baseResolver)
|
|
|
|
// Register p2p-forge resolver for each domain, fallback to baseResolver for others
|
|
opts := []madns.Option{madns.WithDefaultResolver(baseResolver)}
|
|
for _, domain := range forgeDomains {
|
|
opts = append(opts, madns.WithDomainResolver(domain+".", forgeResolver))
|
|
}
|
|
|
|
return madns.NewResolver(opts...)
|
|
}
|