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package dnstap
import (
"strings"
"github.com/coredns/coredns/core/dnsserver"
"github.com/coredns/coredns/plugin"
"github.com/coredns/coredns/plugin/dnstap/dnstapio"
"github.com/coredns/coredns/plugin/pkg/parse"
"github.com/caddyserver/caddy"
)
func init() { plugin.Register("dnstap", wrapSetup) }
func wrapSetup(c *caddy.Controller) error {
if err := setup(c); err != nil {
return plugin.Error("dnstap", err)
}
return nil
}
type config struct {
target string
socket bool
full bool
}
func parseConfig(d *caddy.Controller) (c config, err error) {
d.Next() // directive name
if !d.Args(&c.target) {
return c, d.ArgErr()
}
if strings.HasPrefix(c.target, "tcp://") {
// remote IP endpoint
servers, err := parse.HostPortOrFile(c.target[6:])
if err != nil {
return c, d.ArgErr()
}
c.target = servers[0]
} else {
// default to UNIX socket
c.target = strings.TrimPrefix(c.target, "unix://")
c.socket = true
}
c.full = d.NextArg() && d.Val() == "full"
return
}
func setup(c *caddy.Controller) error {
conf, err := parseConfig(c)
if err != nil {
return err
}
dio := dnstapio.New(conf.target, conf.socket)
dnstap := Dnstap{IO: dio, JoinRawMessage: conf.full}
c.OnStartup(func() error {
dio.Connect()
return nil
})
c.OnRestart(func() error {
dio.Close()
return nil
})
c.OnFinalShutdown(func() error {
dio.Close()
return nil
})
dnsserver.GetConfig(c).AddPlugin(
func(next plugin.Handler) plugin.Handler {
dnstap.Next = next
return dnstap
})
return nil
}
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