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httpcaddyfile: Map default_bind to BindHost in globalACMEDefaults (#7278)

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* Implement BindHost fallback in ACME issuer

* Fix indentation

* Skip creating empty challenges stub in adapted json config

* Skip setting BindHost for DNS Challenge

* golangci-lint fix

---------

Co-authored-by: Matt Holt <mholt@users.noreply.github.com>
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Monviech 2025-10-07 00:48:38 +02:00 • committed by GitHub
parent 3c003deec6
commit 2f1d270968
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15
caddyconfig/httpcaddyfile/tlsapp.go
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@ -554,6 +554,7 @@ func fillInGlobalACMEDefaults(issuer certmagic.Issuer, options map[string]any) e
globalPreferredChains := options["preferred_chains"]
globalCertLifetime := options["cert_lifetime"]
globalHTTPPort, globalHTTPSPort := options["http_port"], options["https_port"]
globalDefaultBind := options["default_bind"]
if globalEmail != nil && acmeIssuer.Email == "" {
acmeIssuer.Email = globalEmail.(string)
@ -606,6 +607,20 @@ func fillInGlobalACMEDefaults(issuer certmagic.Issuer, options map[string]any) e
}
acmeIssuer.Challenges.TLSALPN.AlternatePort = globalHTTPSPort.(int)
}
// If BindHost is still unset, fall back to the first default_bind address if set
// This avoids binding the automation policy to the wildcard socket, which is unexpected behavior when a more selective socket is specified via default_bind
// In BSD it is valid to bind to the wildcard socket even though a more selective socket is already open (still unexpected behavior by the caller though)
// In Linux the same call will error with EADDRINUSE whenever the listener for the automation policy is opened
if acmeIssuer.Challenges == nil || (acmeIssuer.Challenges.DNS == nil && acmeIssuer.Challenges.BindHost == "") {
if defBinds, ok := globalDefaultBind.([]ConfigValue); ok && len(defBinds) > 0 {
if abp, ok := defBinds[0].Value.(addressesWithProtocols); ok && len(abp.addresses) > 0 {
if acmeIssuer.Challenges == nil {
acmeIssuer.Challenges = new(caddytls.ChallengesConfig)
}
acmeIssuer.Challenges.BindHost = abp.addresses[0]
}
}
}
if globalCertLifetime != nil && acmeIssuer.CertificateLifetime == 0 {
acmeIssuer.CertificateLifetime = globalCertLifetime.(caddy.Duration)
}