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05931fe67e
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 Fixes #11136
46 lines
1.6 KiB
Go
46 lines
1.6 KiB
Go
package node
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import (
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"math"
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"time"
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"github.com/ipfs/boxo/gateway"
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config "github.com/ipfs/kubo/config"
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doh "github.com/libp2p/go-doh-resolver"
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madns "github.com/multiformats/go-multiaddr-dns"
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)
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func DNSResolver(cfg *config.Config) (*madns.Resolver, error) {
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var dohOpts []doh.Option
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if !cfg.DNS.MaxCacheTTL.IsDefault() {
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dohOpts = append(dohOpts, doh.WithMaxCacheTTL(cfg.DNS.MaxCacheTTL.WithDefault(time.Duration(math.MaxUint32)*time.Second)))
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}
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// Replace "auto" DNS resolver placeholders with autoconf values
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resolvers := cfg.DNSResolversWithAutoConf()
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// Get base resolver from boxo (handles custom DoH resolvers per eTLD)
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baseResolver, err := gateway.NewDNSResolver(resolvers, dohOpts...)
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if err != nil {
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return nil, err
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}
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// Build list of p2p-forge domains to resolve locally without network I/O.
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// AutoTLS hostnames encode IP addresses directly (e.g., 1-2-3-4.peerID.libp2p.direct),
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// so DNS lookups are wasteful. We always resolve these in-memory.
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forgeDomains := []string{config.DefaultDomainSuffix}
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customDomain := cfg.AutoTLS.DomainSuffix.WithDefault(config.DefaultDomainSuffix)
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if customDomain != config.DefaultDomainSuffix {
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forgeDomains = append(forgeDomains, customDomain)
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}
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forgeResolver := NewP2PForgeResolver(forgeDomains, baseResolver)
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// Register p2p-forge resolver for each domain, fallback to baseResolver for others
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opts := []madns.Option{madns.WithDefaultResolver(baseResolver)}
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for _, domain := range forgeDomains {
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opts = append(opts, madns.WithDomainResolver(domain+".", forgeResolver))
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}
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return madns.NewResolver(opts...)
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}
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