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all: always reset DNS before initializing OS resolver

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So ctrld could always get the correct nameservers used by system to be
used for its OS resolver.
This commit is contained in:
Cuong Manh Le
2024-05-27 15:40:25 +07:00
committed by Cuong Manh Le
parent 411f7434f4
commit 5aca118dbb
3 changed files with 22 additions and 11 deletions
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resolver.go
+11 -5
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@@ -32,12 +32,8 @@ const (
const bootstrapDNS = "76.76.2.22"
// OsNameservers is the list of DNS nameservers used by OS resolver.
// This reads OS settings at the time ctrld process starts.
var OsNameservers = defaultNameservers()
// or is the Resolver used for ResolverTypeOS.
var or = &osResolver{nameservers: OsNameservers}
var or = &osResolver{nameservers: defaultNameservers()}
// defaultNameservers returns nameservers used by the OS.
// If no nameservers can be found, ctrld bootstrap nameserver will be used.
@@ -49,6 +45,16 @@ func defaultNameservers() []string {
return ns
}
// InitializeOsResolver initializes OS resolver using the current system DNS settings.
// It returns the nameservers that is going to be used by the OS resolver.
//
// It's the caller's responsibility to ensure the system DNS is in a clean state before
// calling this function.
func InitializeOsResolver() []string {
or.nameservers = defaultNameservers()
return or.nameservers
}
// Resolver is the interface that wraps the basic DNS operations.
//
// Resolve resolves the DNS query, return the result and the corresponding error.