core: Reuse unix sockets (UDS) and don't try to serve HTTP/3 over UDS (#5063)

* core: Reuse unix sockets

* Don't serve HTTP/3 over unix sockets

This requires upstream support, if even useful

* Don't use unix build tag... yet

* Fix build tag

* Allow ErrNotExist when unlinking socket

1 files changed, 0 insertions, 34 deletions

diff --git a/listen_linux.go b/listen_linux.go
deleted file mode 100644
index b1220ce..0000000
--- a/listen_linux.go
+++ /dev/null
@@ -1,34 +0,0 @@
-package caddy
-
-import (
-	"context"
-	"net"
-	"syscall"
-	"time"
-
-	"go.uber.org/zap"
-	"golang.org/x/sys/unix"
-)
-
-// ListenTimeout is the same as Listen, but with a configurable keep-alive timeout duration.
-func ListenTimeout(network, addr string, keepalivePeriod time.Duration) (net.Listener, error) {
-	// check to see if plugin provides listener
-	if ln, err := getListenerFromPlugin(network, addr); err != nil || ln != nil {
-		return ln, err
-	}
-
-	config := &net.ListenConfig{Control: reusePort, KeepAlive: keepalivePeriod}
-	return config.Listen(context.Background(), network, addr)
-}
-
-func reusePort(network, address string, conn syscall.RawConn) error {
-	return conn.Control(func(descriptor uintptr) {
-		if err := unix.SetsockoptInt(int(descriptor), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1); err != nil {
-			Log().Error("setting SO_REUSEPORT",
-				zap.String("network", network),
-				zap.String("address", address),
-				zap.Uintptr("descriptor", descriptor),
-				zap.Error(err))
-		}
-	})
-}