diff options
Diffstat (limited to 'src/pkg/net/dnsclient.go')
| -rw-r--r-- | src/pkg/net/dnsclient.go | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/src/pkg/net/dnsclient.go b/src/pkg/net/dnsclient.go index c3e727bce..89f2409bf 100644 --- a/src/pkg/net/dnsclient.go +++ b/src/pkg/net/dnsclient.go @@ -307,17 +307,22 @@ func lookup(name string, qtype uint16) (cname string, addrs []dnsRR, err os.Erro } // goLookupHost is the native Go implementation of LookupHost. +// Used only if cgoLookupHost refuses to handle the request +// (that is, only if cgoLookupHost is the stub in cgo_stub.go). +// Normally we let cgo use the C library resolver instead of +// depending on our lookup code, so that Go and C get the same +// answers. func goLookupHost(name string) (addrs []string, err os.Error) { - onceLoadConfig.Do(loadConfig) - if dnserr != nil || cfg == nil { - err = dnserr - return - } // Use entries from /etc/hosts if they match. addrs = lookupStaticHost(name) if len(addrs) > 0 { return } + onceLoadConfig.Do(loadConfig) + if dnserr != nil || cfg == nil { + err = dnserr + return + } ips, err := goLookupIP(name) if err != nil { return @@ -330,6 +335,11 @@ func goLookupHost(name string) (addrs []string, err os.Error) { } // goLookupIP is the native Go implementation of LookupIP. +// Used only if cgoLookupIP refuses to handle the request +// (that is, only if cgoLookupIP is the stub in cgo_stub.go). +// Normally we let cgo use the C library resolver instead of +// depending on our lookup code, so that Go and C get the same +// answers. func goLookupIP(name string) (addrs []IP, err os.Error) { onceLoadConfig.Do(loadConfig) if dnserr != nil || cfg == nil { @@ -358,11 +368,13 @@ func goLookupIP(name string) (addrs []IP, err os.Error) { return } -// LookupCNAME returns the canonical DNS host for the given name. -// Callers that do not care about the canonical name can call -// LookupHost or LookupIP directly; both take care of resolving -// the canonical name as part of the lookup. -func LookupCNAME(name string) (cname string, err os.Error) { +// goLookupCNAME is the native Go implementation of LookupCNAME. +// Used only if cgoLookupCNAME refuses to handle the request +// (that is, only if cgoLookupCNAME is the stub in cgo_stub.go). +// Normally we let cgo use the C library resolver instead of +// depending on our lookup code, so that Go and C get the same +// answers. +func goLookupCNAME(name string) (cname string, err os.Error) { onceLoadConfig.Do(loadConfig) if dnserr != nil || cfg == nil { err = dnserr |