project init

setup.go

@@ -0,0 +1,59 @@
+package synthetic
+
+import (
+	"fmt"
+	"github.com/coredns/caddy"
+	"github.com/coredns/coredns/core/dnsserver"
+	"github.com/coredns/coredns/plugin"
+	"net"
+)
+
+// syntheticConfig holds the configuration options for the synthetic plugin.
+type syntheticConfig struct {
+	net     []*net.IPNet
+	forward string
+}
+
+// init registers this plugin.
+func init() { plugin.Register("synthetic", setup) }
+
+// setup is the function that gets called when the config parser see the token "synthetic".
+func setup(c *caddy.Controller) error {
+	var config syntheticConfig
+
+	// Parse the configuration file
+	for c.Next() {
+		for c.NextBlock() {
+			switch v := c.Val(); v {
+
+			// Configuration for forward lookup zones for which to do resolution
+			case "net":
+				args := c.RemainingArgs()
+				for _, arg := range args {
+					_, cidr, err := net.ParseCIDR(arg)
+					if err == nil {
+						config.net = append(config.net, cidr)
+					} else {
+						return fmt.Errorf("synthetic: invalid reverse lookup cidr: %v", arg)
+					}
+				}
+
+			// Configuration for reverse lookup zones for the forward lookup zone name
+			case "forward":
+				args := c.RemainingArgs()
+				for _, arg := range args {
+					config.forward = arg
+				}
+
+			default:
+				return c.Errf("unknown property '%s'", v)
+			}
+		}
+	}
+
+	dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
+		return synthetic{Next: next, Config: config}
+	})
+
+	return nil
+}