1 files changed, 0 insertions, 98 deletions
diff --git a/plugin/pkg/dnsutil/host.go b/plugin/pkg/dnsutil/host.go
deleted file mode 100644
index b03b39586..000000000
--- a/plugin/pkg/dnsutil/host.go
+++ /dev/null
@@ -1,98 +0,0 @@
-package dnsutil
-
-import (
-	"fmt"
-	"net"
-	"os"
-
-	"github.com/coredns/coredns/plugin/pkg/transport"
-
-	"github.com/miekg/dns"
-)
-
-// ParseHostPortOrFile parses the strings in s, each string can either be a
-// address, [scheme://]address:port or a filename. The address part is checked
-// and in case of filename a resolv.conf like file is (assumed) and parsed and
-// the nameservers found are returned.
-func ParseHostPortOrFile(s ...string) ([]string, error) {
-	var servers []string
-	for _, h := range s {
-
-		trans, host := transport.Parse(h)
-
-		addr, _, err := net.SplitHostPort(host)
-		if err != nil {
-			// Parse didn't work, it is not a addr:port combo
-			if net.ParseIP(host) == nil {
-				// Not an IP address.
-				ss, err := tryFile(host)
-				if err == nil {
-					servers = append(servers, ss...)
-					continue
-				}
-				return servers, fmt.Errorf("not an IP address or file: %q", host)
-			}
-			var ss string
-			switch trans {
-			case transport.DNS:
-				ss = net.JoinHostPort(host, "53")
-			case transport.TLS:
-				ss = transport.TLS + "://" + net.JoinHostPort(host, transport.TLSPort)
-			case transport.GRPC:
-				ss = transport.GRPC + "://" + net.JoinHostPort(host, transport.GRPCPort)
-			case transport.HTTPS:
-				ss = transport.HTTPS + "://" + net.JoinHostPort(host, transport.HTTPSPort)
-			}
-			servers = append(servers, ss)
-			continue
-		}
-
-		if net.ParseIP(addr) == nil {
-			// Not an IP address.
-			ss, err := tryFile(host)
-			if err == nil {
-				servers = append(servers, ss...)
-				continue
-			}
-			return servers, fmt.Errorf("not an IP address or file: %q", host)
-		}
-		servers = append(servers, h)
-	}
-	return servers, nil
-}
-
-// Try to open this is a file first.
-func tryFile(s string) ([]string, error) {
-	c, err := dns.ClientConfigFromFile(s)
-	if err == os.ErrNotExist {
-		return nil, fmt.Errorf("failed to open file %q: %q", s, err)
-	} else if err != nil {
-		return nil, err
-	}
-
-	servers := []string{}
-	for _, s := range c.Servers {
-		servers = append(servers, net.JoinHostPort(s, c.Port))
-	}
-	return servers, nil
-}
-
-// ParseHostPort will check if the host part is a valid IP address, if the
-// IP address is valid, but no port is found, defaultPort is added.
-func ParseHostPort(s, defaultPort string) (string, error) {
-	addr, port, err := net.SplitHostPort(s)
-	if port == "" {
-		port = defaultPort
-	}
-	if err != nil {
-		if net.ParseIP(s) == nil {
-			return "", fmt.Errorf("must specify an IP address: `%s'", s)
-		}
-		return net.JoinHostPort(s, port), nil
-	}
-
-	if net.ParseIP(addr) == nil {
-		return "", fmt.Errorf("must specify an IP address: `%s'", addr)
-	}
-	return net.JoinHostPort(addr, port), nil
-}