102 lines
2.1 KiB
Go
102 lines
2.1 KiB
Go
package transfer
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import (
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"github.com/coredns/coredns/core/dnsserver"
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"github.com/coredns/coredns/plugin"
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parsepkg "github.com/coredns/coredns/plugin/pkg/parse"
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"github.com/coredns/coredns/plugin/pkg/transport"
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"github.com/caddyserver/caddy"
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)
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func init() {
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caddy.RegisterPlugin("transfer", caddy.Plugin{
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ServerType: "dns",
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Action: setup,
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})
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}
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func setup(c *caddy.Controller) error {
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t, err := parse(c)
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if err != nil {
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return plugin.Error("transfer", err)
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}
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dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
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t.Next = next
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return t
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})
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c.OnStartup(func() error {
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// find all plugins that implement Transferer and add them to Transferers
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plugins := dnsserver.GetConfig(c).Handlers()
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for _, pl := range plugins {
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tr, ok := pl.(Transferer)
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if !ok {
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continue
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}
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t.Transferers = append(t.Transferers, tr)
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}
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return nil
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})
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return nil
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}
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func parse(c *caddy.Controller) (*Transfer, error) {
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t := &Transfer{}
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for c.Next() {
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x := &xfr{}
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zones := c.RemainingArgs()
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if len(zones) != 0 {
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x.Zones = zones
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for i := 0; i < len(x.Zones); i++ {
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nzone, err := plugin.Host(x.Zones[i]).MustNormalize()
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if err != nil {
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return nil, err
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}
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x.Zones[i] = nzone
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}
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} else {
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x.Zones = make([]string, len(c.ServerBlockKeys))
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for i := 0; i < len(c.ServerBlockKeys); i++ {
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nzone, err := plugin.Host(c.ServerBlockKeys[i]).MustNormalize()
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if err != nil {
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return nil, err
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}
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x.Zones[i] = nzone
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}
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}
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for c.NextBlock() {
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switch c.Val() {
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case "to":
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args := c.RemainingArgs()
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if len(args) == 0 {
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return nil, c.ArgErr()
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}
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for _, host := range args {
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if host == "*" {
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x.to = append(x.to, host)
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continue
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}
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normalized, err := parsepkg.HostPort(host, transport.Port)
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if err != nil {
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return nil, err
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}
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x.to = append(x.to, normalized)
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}
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default:
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return nil, plugin.Error("transfer", c.Errf("unknown property '%s'", c.Val()))
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}
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}
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if len(x.to) == 0 {
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return nil, plugin.Error("transfer", c.Errf("'to' is required", c.Val()))
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}
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t.xfrs = append(t.xfrs, x)
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}
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return t, nil
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}
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