9047bdf3a0
* add OverlapChecker, move the test of overlap AFTER the directive setup process, change key of configs to allow multiple same key * glitch when rebase. init of Config should include the default host * add tests for the registering of configuration rename multicast in 'unbound'. add comments on the validator * - merged zoneAddr and addrKey that are very similar - move maps of Validator to zoneAddr, avoinding need to have string representation of zoneaddr - moving key build for saving Config at Config side instead of dnsContext * - UT on saving config is now useless. * - cannot cleanup access to Configs after setup. Deferred function to Start, use it * - cleanup register unit tests. remove useless function * - address comments of review. name of validator, comments, simplify registerAndCheck * - fixes after review. renaming a function and a comment
90 lines
2.5 KiB
Go
90 lines
2.5 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"
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"github.com/coredns/coredns/plugin"
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"github.com/mholt/caddy"
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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 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 further filter access
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// to this handler. The primary use is to limit access to a reverse zone
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// on a non-octet boundary, i.e. /17
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FilterFunc func(string) 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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}
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//HostAddresses builds a representation of the addresses of this Config
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//after server is started ONLY, can be used as a Key for identifing that config
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// :53 or 127.0.0.1:53 or 127.0.0.1:53/::1:53
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func (c *Config) HostAddresses() string {
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all := ""
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for _, h := range c.ListenHosts {
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addr := net.JoinHostPort(h, c.Port)
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if all == "" {
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all = addr
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continue
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}
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all = all + "/" + addr
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}
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return all
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}
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// keyForConfig build 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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