12 // DefaultHTTPPort Default HTTP Port used if only the protocol is provided to -H flag e.g. dockerd -H tcp://
13 // These are the IANA registered port numbers for use with Docker
14 // see http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=docker
15 DefaultHTTPPort = 2375 // Default HTTP Port
16 // DefaultTLSHTTPPort Default HTTP Port used when TLS enabled
17 DefaultTLSHTTPPort = 2376 // Default TLS encrypted HTTP Port
18 // DefaultUnixSocket Path for the unix socket.
19 // Docker daemon by default always listens on the default unix socket
20 DefaultUnixSocket = "/var/run/docker.sock"
21 // DefaultTCPHost constant defines the default host string used by docker on Windows
22 DefaultTCPHost = fmt.Sprintf("tcp://%s:%d", DefaultHTTPHost, DefaultHTTPPort)
23 // DefaultTLSHost constant defines the default host string used by docker for TLS sockets
24 DefaultTLSHost = fmt.Sprintf("tcp://%s:%d", DefaultHTTPHost, DefaultTLSHTTPPort)
25 // DefaultNamedPipe defines the default named pipe used by docker on Windows
26 DefaultNamedPipe = `//./pipe/docker_engine`
29 // ValidateHost validates that the specified string is a valid host and returns it.
30 func ValidateHost(val string) (string, error) {
31 host := strings.TrimSpace(val)
32 // The empty string means default and is not handled by parseDockerDaemonHost
34 _, err := parseDockerDaemonHost(host)
39 // Note: unlike most flag validators, we don't return the mutated value here
40 // we need to know what the user entered later (using ParseHost) to adjust for TLS
44 // ParseHost and set defaults for a Daemon host string
45 func ParseHost(defaultToTLS bool, val string) (string, error) {
46 host := strings.TrimSpace(val)
55 host, err = parseDockerDaemonHost(host)
63 // parseDockerDaemonHost parses the specified address and returns an address that will be used as the host.
64 // Depending of the address specified, this may return one of the global Default* strings defined in hosts.go.
65 func parseDockerDaemonHost(addr string) (string, error) {
66 addrParts := strings.SplitN(addr, "://", 2)
67 if len(addrParts) == 1 && addrParts[0] != "" {
68 addrParts = []string{"tcp", addrParts[0]}
73 return ParseTCPAddr(addrParts[1], DefaultTCPHost)
75 return parseSimpleProtoAddr("unix", addrParts[1], DefaultUnixSocket)
77 return parseSimpleProtoAddr("npipe", addrParts[1], DefaultNamedPipe)
81 return "", fmt.Errorf("Invalid bind address format: %s", addr)
85 // parseSimpleProtoAddr parses and validates that the specified address is a valid
86 // socket address for simple protocols like unix and npipe. It returns a formatted
87 // socket address, either using the address parsed from addr, or the contents of
88 // defaultAddr if addr is a blank string.
89 func parseSimpleProtoAddr(proto, addr, defaultAddr string) (string, error) {
90 addr = strings.TrimPrefix(addr, proto+"://")
91 if strings.Contains(addr, "://") {
92 return "", fmt.Errorf("Invalid proto, expected %s: %s", proto, addr)
97 return fmt.Sprintf("%s://%s", proto, addr), nil
100 // ParseTCPAddr parses and validates that the specified address is a valid TCP
101 // address. It returns a formatted TCP address, either using the address parsed
102 // from tryAddr, or the contents of defaultAddr if tryAddr is a blank string.
103 // tryAddr is expected to have already been Trim()'d
104 // defaultAddr must be in the full `tcp://host:port` form
105 func ParseTCPAddr(tryAddr string, defaultAddr string) (string, error) {
106 if tryAddr == "" || tryAddr == "tcp://" {
107 return defaultAddr, nil
109 addr := strings.TrimPrefix(tryAddr, "tcp://")
110 if strings.Contains(addr, "://") || addr == "" {
111 return "", fmt.Errorf("Invalid proto, expected tcp: %s", tryAddr)
114 defaultAddr = strings.TrimPrefix(defaultAddr, "tcp://")
115 defaultHost, defaultPort, err := net.SplitHostPort(defaultAddr)
119 // url.Parse fails for trailing colon on IPv6 brackets on Go 1.5, but
120 // not 1.4. See https://github.com/golang/go/issues/12200 and
121 // https://github.com/golang/go/issues/6530.
122 if strings.HasSuffix(addr, "]:") {
126 u, err := url.Parse("tcp://" + addr)
130 host, port, err := net.SplitHostPort(u.Host)
132 // try port addition once
133 host, port, err = net.SplitHostPort(net.JoinHostPort(u.Host, defaultPort))
136 return "", fmt.Errorf("Invalid bind address format: %s", tryAddr)
145 p, err := strconv.Atoi(port)
146 if err != nil && p == 0 {
147 return "", fmt.Errorf("Invalid bind address format: %s", tryAddr)
150 return fmt.Sprintf("tcp://%s%s", net.JoinHostPort(host, port), u.Path), nil
153 // ValidateExtraHost validates that the specified string is a valid extrahost and returns it.
154 // ExtraHost is in the form of name:ip where the ip has to be a valid ip (IPv4 or IPv6).
155 func ValidateExtraHost(val string) (string, error) {
156 // allow for IPv6 addresses in extra hosts by only splitting on first ":"
157 arr := strings.SplitN(val, ":", 2)
158 if len(arr) != 2 || len(arr[0]) == 0 {
159 return "", fmt.Errorf("bad format for add-host: %q", val)
161 if _, err := ValidateIPAddress(arr[1]); err != nil {
162 return "", fmt.Errorf("invalid IP address in add-host: %q", arr[1])