package opts import ( "fmt" "net" "os" "path" "regexp" "strings" "github.com/docker/docker/pkg/parsers" "github.com/docker/docker/volume" ) var ( alphaRegexp = regexp.MustCompile(`[a-zA-Z]`) domainRegexp = regexp.MustCompile(`^(:?(:?[a-zA-Z0-9]|(:?[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9]))(:?\.(:?[a-zA-Z0-9]|(:?[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])))*)\.?\s*$`) // DefaultHTTPHost Default HTTP Host used if only port is provided to -H flag e.g. docker daemon -H tcp://:8080 DefaultHTTPHost = "127.0.0.1" // DefaultHTTPPort Default HTTP Port used if only the protocol is provided to -H flag e.g. docker daemon -H tcp:// // TODO Windows. DefaultHTTPPort is only used on Windows if a -H parameter // is not supplied. A better longer term solution would be to use a named // pipe as the default on the Windows daemon. DefaultHTTPPort = 2375 // Default HTTP Port // DefaultUnixSocket Path for the unix socket. // Docker daemon by default always listens on the default unix socket DefaultUnixSocket = "/var/run/docker.sock" // DefaultTCPHost constant defines the default host string used by docker on Windows DefaultTCPHost = fmt.Sprintf("tcp://%s:%d", DefaultHTTPHost, DefaultHTTPPort) ) // ListOpts holds a list of values and a validation function. type ListOpts struct { values *[]string validator ValidatorFctType } // NewListOpts creates a new ListOpts with the specified validator. func NewListOpts(validator ValidatorFctType) ListOpts { var values []string return *NewListOptsRef(&values, validator) } // NewListOptsRef creates a new ListOpts with the specified values and validator. func NewListOptsRef(values *[]string, validator ValidatorFctType) *ListOpts { return &ListOpts{ values: values, validator: validator, } } func (opts *ListOpts) String() string { return fmt.Sprintf("%v", []string((*opts.values))) } // Set validates if needed the input value and add it to the // internal slice. func (opts *ListOpts) Set(value string) error { if opts.validator != nil { v, err := opts.validator(value) if err != nil { return err } value = v } (*opts.values) = append((*opts.values), value) return nil } // Delete removes the specified element from the slice. func (opts *ListOpts) Delete(key string) { for i, k := range *opts.values { if k == key { (*opts.values) = append((*opts.values)[:i], (*opts.values)[i+1:]...) return } } } // GetMap returns the content of values in a map in order to avoid // duplicates. // FIXME: can we remove this? func (opts *ListOpts) GetMap() map[string]struct{} { ret := make(map[string]struct{}) for _, k := range *opts.values { ret[k] = struct{}{} } return ret } // GetAll returns the values of slice. // FIXME: Can we remove this? func (opts *ListOpts) GetAll() []string { return (*opts.values) } // Get checks the existence of the specified key. func (opts *ListOpts) Get(key string) bool { for _, k := range *opts.values { if k == key { return true } } return false } // Len returns the amount of element in the slice. func (opts *ListOpts) Len() int { return len((*opts.values)) } //MapOpts holds a map of values and a validation function. type MapOpts struct { values map[string]string validator ValidatorFctType } // Set validates if needed the input value and add it to the // internal map, by splitting on '='. func (opts *MapOpts) Set(value string) error { if opts.validator != nil { v, err := opts.validator(value) if err != nil { return err } value = v } vals := strings.SplitN(value, "=", 2) if len(vals) == 1 { (opts.values)[vals[0]] = "" } else { (opts.values)[vals[0]] = vals[1] } return nil } // GetAll returns the values of MapOpts as a map. func (opts *MapOpts) GetAll() map[string]string { return opts.values } func (opts *MapOpts) String() string { return fmt.Sprintf("%v", map[string]string((opts.values))) } // NewMapOpts creates a new MapOpts with the specified map of values and a validator. func NewMapOpts(values map[string]string, validator ValidatorFctType) *MapOpts { if values == nil { values = make(map[string]string) } return &MapOpts{ values: values, validator: validator, } } // ValidatorFctType defines a validator function that returns a validated string and/or an error. type ValidatorFctType func(val string) (string, error) // ValidatorFctListType defines a validator function that returns a validated list of string and/or an error type ValidatorFctListType func(val string) ([]string, error) // ValidateAttach validates that the specified string is a valid attach option. func ValidateAttach(val string) (string, error) { s := strings.ToLower(val) for _, str := range []string{"stdin", "stdout", "stderr"} { if s == str { return s, nil } } return val, fmt.Errorf("valid streams are STDIN, STDOUT and STDERR") } // ValidateLink validates that the specified string has a valid link format (containerName:alias). func ValidateLink(val string) (string, error) { if _, _, err := parsers.ParseLink(val); err != nil { return val, err } return val, nil } // ValidDeviceMode checks if the mode for device is valid or not. // Valid mode is a composition of r (read), w (write), and m (mknod). func ValidDeviceMode(mode string) bool { var legalDeviceMode = map[rune]bool{ 'r': true, 'w': true, 'm': true, } if mode == "" { return false } for _, c := range mode { if !legalDeviceMode[c] { return false } legalDeviceMode[c] = false } return true } // ValidateDevice validates a path for devices // It will make sure 'val' is in the form: // [host-dir:]container-path[:mode] // It also validates the device mode. func ValidateDevice(val string) (string, error) { return validatePath(val, ValidDeviceMode) } // ValidatePath validates a path for volumes // It will make sure 'val' is in the form: // [host-dir:]container-path[:rw|ro] // It also validates the mount mode. func ValidatePath(val string) (string, error) { return validatePath(val, volume.ValidMountMode) } func validatePath(val string, validator func(string) bool) (string, error) { var containerPath string var mode string if strings.Count(val, ":") > 2 { return val, fmt.Errorf("bad format for path: %s", val) } split := strings.SplitN(val, ":", 3) if split[0] == "" { return val, fmt.Errorf("bad format for path: %s", val) } switch len(split) { case 1: containerPath = split[0] val = path.Clean(containerPath) case 2: if isValid := validator(split[1]); isValid { containerPath = split[0] mode = split[1] val = fmt.Sprintf("%s:%s", path.Clean(containerPath), mode) } else { containerPath = split[1] val = fmt.Sprintf("%s:%s", split[0], path.Clean(containerPath)) } case 3: containerPath = split[1] mode = split[2] if isValid := validator(split[2]); !isValid { return val, fmt.Errorf("bad mode specified: %s", mode) } val = fmt.Sprintf("%s:%s:%s", split[0], containerPath, mode) } if !path.IsAbs(containerPath) { return val, fmt.Errorf("%s is not an absolute path", containerPath) } return val, nil } // ValidateEnv validates an environment variable and returns it. // It uses EnvironmentVariableRegexp to ensure the name of the environment variable is valid. // If no value is specified, it returns the current value using os.Getenv. func ValidateEnv(val string) (string, error) { arr := strings.Split(val, "=") if len(arr) > 1 { return val, nil } if !EnvironmentVariableRegexp.MatchString(arr[0]) { return val, ErrBadEnvVariable{fmt.Sprintf("variable '%s' is not a valid environment variable", val)} } if !doesEnvExist(val) { return val, nil } return fmt.Sprintf("%s=%s", val, os.Getenv(val)), nil } // ValidateIPAddress validates an Ip address. func ValidateIPAddress(val string) (string, error) { var ip = net.ParseIP(strings.TrimSpace(val)) if ip != nil { return ip.String(), nil } return "", fmt.Errorf("%s is not an ip address", val) } // ValidateMACAddress validates a MAC address. func ValidateMACAddress(val string) (string, error) { _, err := net.ParseMAC(strings.TrimSpace(val)) if err != nil { return "", err } return val, nil } // ValidateDNSSearch validates domain for resolvconf search configuration. // A zero length domain is represented by a dot (.). func ValidateDNSSearch(val string) (string, error) { if val = strings.Trim(val, " "); val == "." { return val, nil } return validateDomain(val) } func validateDomain(val string) (string, error) { if alphaRegexp.FindString(val) == "" { return "", fmt.Errorf("%s is not a valid domain", val) } ns := domainRegexp.FindSubmatch([]byte(val)) if len(ns) > 0 && len(ns[1]) < 255 { return string(ns[1]), nil } return "", fmt.Errorf("%s is not a valid domain", val) } // ValidateExtraHost validates that the specified string is a valid extrahost and returns it. // ExtraHost are in the form of name:ip where the ip has to be a valid ip (ipv4 or ipv6). func ValidateExtraHost(val string) (string, error) { // allow for IPv6 addresses in extra hosts by only splitting on first ":" arr := strings.SplitN(val, ":", 2) if len(arr) != 2 || len(arr[0]) == 0 { return "", fmt.Errorf("bad format for add-host: %q", val) } if _, err := ValidateIPAddress(arr[1]); err != nil { return "", fmt.Errorf("invalid IP address in add-host: %q", arr[1]) } return val, nil } // ValidateLabel validates that the specified string is a valid label, and returns it. // Labels are in the form on key=value. func ValidateLabel(val string) (string, error) { if strings.Count(val, "=") < 1 { return "", fmt.Errorf("bad attribute format: %s", val) } return val, nil } // ValidateHost validates that the specified string is a valid host and returns it. func ValidateHost(val string) (string, error) { host, err := parsers.ParseDockerDaemonHost(DefaultTCPHost, DefaultUnixSocket, val) if err != nil { return val, err } return host, nil } func doesEnvExist(name string) bool { for _, entry := range os.Environ() { parts := strings.SplitN(entry, "=", 2) if parts[0] == name { return true } } return false }