78 lines
2.3 KiB
Go
78 lines
2.3 KiB
Go
package dnsserver
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import (
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"crypto/tls"
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"fmt"
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"net/http"
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"github.com/coredns/caddy"
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"github.com/coredns/coredns/plugin"
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)
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// Config configuration for a single server.
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type Config struct {
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// The zone of the site.
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Zone string
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// one or several hostnames to bind the server to.
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// defaults to a single empty string that denote the wildcard address
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ListenHosts []string
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// The port to listen on.
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Port string
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// Root points to a base directory we find user defined "things".
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// First consumer is the file plugin to looks for zone files in this place.
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Root string
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// Debug controls the panic/recover mechanism that is enabled by default.
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Debug bool
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// The transport we implement, normally just "dns" over TCP/UDP, but could be
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// DNS-over-TLS or DNS-over-gRPC.
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Transport string
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// If this function is not nil it will be used to inspect and validate
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// HTTP requests. Although this isn't referenced in-tree, external plugins
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// may depend on it.
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HTTPRequestValidateFunc func(*http.Request) bool
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// TLSConfig when listening for encrypted connections (gRPC, DNS-over-TLS).
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TLSConfig *tls.Config
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// Plugin stack.
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Plugin []plugin.Plugin
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// Compiled plugin stack.
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pluginChain plugin.Handler
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// Plugin interested in announcing that they exist, so other plugin can call methods
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// on them should register themselves here. The name should be the name as return by the
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// Handler's Name method.
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registry map[string]plugin.Handler
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// firstConfigInBlock is used to reference the first config in a server block, for the
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// purpose of sharing single instance of each plugin among all zones in a server block.
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firstConfigInBlock *Config
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}
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// keyForConfig builds a key for identifying the configs during setup time
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func keyForConfig(blocIndex int, blocKeyIndex int) string {
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return fmt.Sprintf("%d:%d", blocIndex, blocKeyIndex)
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}
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// GetConfig gets the Config that corresponds to c.
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// If none exist nil is returned.
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func GetConfig(c *caddy.Controller) *Config {
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ctx := c.Context().(*dnsContext)
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key := keyForConfig(c.ServerBlockIndex, c.ServerBlockKeyIndex)
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if cfg, ok := ctx.keysToConfigs[key]; ok {
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return cfg
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}
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// we should only get here during tests because directive
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// actions typically skip the server blocks where we make
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// the configs.
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ctx.saveConfig(key, &Config{ListenHosts: []string{""}})
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return GetConfig(c)
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}
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