Remove the radix.Radix dependency
Put everything in maps. This removes to a major dependency and makes Go DNS only depend on the core Go packages. This will probably also be faster than the current setup -- although this needs to be benchmarked.
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parent
cb4c191bd3
commit
45775dff76
56
server.go
56
server.go
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@ -7,7 +7,6 @@
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package dns
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import (
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"github.com/miekg/radix"
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"net"
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"sync"
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"time"
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@ -56,12 +55,12 @@ type response struct {
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// is also registered), otherwise the child gets the query.
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// ServeMux is also safe for concurrent access from multiple goroutines.
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type ServeMux struct {
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r *radix.Radix
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z map[string]Handler
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m *sync.RWMutex
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}
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// NewServeMux allocates and returns a new ServeMux.
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func NewServeMux() *ServeMux { return &ServeMux{r: radix.New(), m: new(sync.RWMutex)} }
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func NewServeMux() *ServeMux { return &ServeMux{z: make(map[string]Handler), m: new(sync.RWMutex)} }
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// DefaultServeMux is the default ServeMux used by Serve.
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var DefaultServeMux = NewServeMux()
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@ -70,7 +69,7 @@ var DefaultServeMux = NewServeMux()
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var Authors = []string{"Miek Gieben", "Ask Bjørn Hansen", "Dave Cheney", "Dusty Wilson", "Peter van Dijk"}
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// Version holds the current version.
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var Version = "v1.0"
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var Version = "v1.1"
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// The HandlerFunc type is an adapter to allow the use of
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// ordinary functions as DNS handlers. If f is a function
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@ -165,27 +164,40 @@ func ListenAndServe(addr string, network string, handler Handler) error {
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return server.ListenAndServe()
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}
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func (mux *ServeMux) match(zone string, t uint16) Handler {
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func (mux *ServeMux) match(q string, t uint16) Handler {
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mux.m.RLock()
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defer mux.m.RUnlock()
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if h, e := mux.r.Find(toRadixName(zone)); e {
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// If we got queried for a DS record, we must see if we
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// if we also serve the parent. We then redirect the query to it.
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if t != TypeDS {
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return h.Value.(Handler)
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var (
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handler Handler
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lastdot int
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lastbyte byte
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seendot bool = true
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)
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// TODO(mg): check for .
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for i := 0; i < len(q); i++ {
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if seendot {
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if h, ok := mux.z[q[lastdot:]]; ok {
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if t != TypeDS {
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return h
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} else {
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// Continue for DS to see if we have a parent too, if so delegeate to the parent
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handler = h
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}
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}
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}
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if d := h.Up(); d != nil {
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return d.Value.(Handler)
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if q[i] == '.' && lastbyte != '\\' {
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lastdot = i
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seendot = true
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} else {
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seendot = false
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}
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// No parent zone found, let the original handler take care of it
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return h.Value.(Handler)
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} else {
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if h == nil {
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return nil
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}
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return h.Value.(Handler)
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lastbyte = q[i]
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}
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panic("dns: not reached")
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if handler != nil {
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return handler
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}
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return nil
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}
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// Handle adds a handler to the ServeMux for pattern.
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@ -194,7 +206,7 @@ func (mux *ServeMux) Handle(pattern string, handler Handler) {
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panic("dns: invalid pattern " + pattern)
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}
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mux.m.Lock()
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mux.r.Insert(toRadixName(Fqdn(pattern)), handler)
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mux.z[Fqdn(pattern)] = handler
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mux.m.Unlock()
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}
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@ -209,7 +221,7 @@ func (mux *ServeMux) HandleRemove(pattern string) {
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panic("dns: invalid pattern " + pattern)
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}
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mux.m.Lock()
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mux.r.Remove(toRadixName(Fqdn(pattern)))
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delete(mux.z, Fqdn(pattern))
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mux.m.Unlock()
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}
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