Initial commit

vendor/github.com/hyperhq/hypercli/api/server/server_unix.go

@@ -0,0 +1,132 @@
+// +build freebsd linux
+
+package server
+
+import (
+	"crypto/tls"
+	"fmt"
+	"net"
+	"net/http"
+	"strconv"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/docker/go-connections/sockets"
+	"github.com/docker/libnetwork/portallocator"
+
+	systemdActivation "github.com/coreos/go-systemd/activation"
+)
+
+// newServer sets up the required HTTPServers and does protocol specific checking.
+// newServer does not set any muxers, you should set it later to Handler field
+func (s *Server) newServer(proto, addr string) ([]*HTTPServer, error) {
+	var (
+		err error
+		ls  []net.Listener
+	)
+	switch proto {
+	case "fd":
+		ls, err = listenFD(addr, s.cfg.TLSConfig)
+		if err != nil {
+			return nil, err
+		}
+	case "tcp":
+		l, err := s.initTCPSocket(addr)
+		if err != nil {
+			return nil, err
+		}
+		ls = append(ls, l)
+	case "unix":
+		l, err := sockets.NewUnixSocket(addr, s.cfg.SocketGroup)
+		if err != nil {
+			return nil, fmt.Errorf("can't create unix socket %s: %v", addr, err)
+		}
+		ls = append(ls, l)
+	default:
+		return nil, fmt.Errorf("Invalid protocol format: %q", proto)
+	}
+	var res []*HTTPServer
+	for _, l := range ls {
+		res = append(res, &HTTPServer{
+			&http.Server{
+				Addr: addr,
+			},
+			l,
+		})
+	}
+	return res, nil
+}
+
+func allocateDaemonPort(addr string) error {
+	host, port, err := net.SplitHostPort(addr)
+	if err != nil {
+		return err
+	}
+
+	intPort, err := strconv.Atoi(port)
+	if err != nil {
+		return err
+	}
+
+	var hostIPs []net.IP
+	if parsedIP := net.ParseIP(host); parsedIP != nil {
+		hostIPs = append(hostIPs, parsedIP)
+	} else if hostIPs, err = net.LookupIP(host); err != nil {
+		return fmt.Errorf("failed to lookup %s address in host specification", host)
+	}
+
+	pa := portallocator.Get()
+	for _, hostIP := range hostIPs {
+		if _, err := pa.RequestPort(hostIP, "tcp", intPort); err != nil {
+			return fmt.Errorf("failed to allocate daemon listening port %d (err: %v)", intPort, err)
+		}
+	}
+	return nil
+}
+
+// listenFD returns the specified socket activated files as a slice of
+// net.Listeners or all of the activated files if "*" is given.
+func listenFD(addr string, tlsConfig *tls.Config) ([]net.Listener, error) {
+	var (
+		err       error
+		listeners []net.Listener
+	)
+	// socket activation
+	if tlsConfig != nil {
+		listeners, err = systemdActivation.TLSListeners(false, tlsConfig)
+	} else {
+		listeners, err = systemdActivation.Listeners(false)
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	if len(listeners) == 0 {
+		return nil, fmt.Errorf("No sockets found")
+	}
+
+	// default to all fds just like unix:// and tcp://
+	if addr == "" || addr == "*" {
+		return listeners, nil
+	}
+
+	fdNum, err := strconv.Atoi(addr)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse systemd address, should be number: %v", err)
+	}
+	fdOffset := fdNum - 3
+	if len(listeners) < int(fdOffset)+1 {
+		return nil, fmt.Errorf("Too few socket activated files passed in")
+	}
+	if listeners[fdOffset] == nil {
+		return nil, fmt.Errorf("failed to listen on systemd activated file at fd %d", fdOffset+3)
+	}
+	for i, ls := range listeners {
+		if i == fdOffset || ls == nil {
+			continue
+		}
+		if err := ls.Close(); err != nil {
+			logrus.Errorf("Failed to close systemd activated file at fd %d: %v", fdOffset+3, err)
+		}
+	}
+	return []net.Listener{listeners[fdOffset]}, nil
+}