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// Copyright 2015 The appc Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package types
import (
"encoding/json"
"errors"
"fmt"
"net"
"net/url"
"strconv"
"github.com/appc/spec/schema/common"
)
// Port represents a port as offered by an application *inside*
// the pod.
type Port struct {
Name ACName `json:"name"`
Protocol string `json:"protocol"`
Port uint `json:"port"`
Count uint `json:"count"`
SocketActivated bool `json:"socketActivated"`
}
// ExposedPort represents a port listening on the host side.
// The PodPort is optional -- if missing, then try and find the pod-side
// information by matching names
type ExposedPort struct {
Name ACName `json:"name"`
HostPort uint `json:"hostPort"`
HostIP net.IP `json:"hostIP,omitempty"` // optional
PodPort *Port `json:"podPort,omitempty"` // optional. If missing, try and find a corresponding App's port
}
type port Port
func (p *Port) UnmarshalJSON(data []byte) error {
var pp port
if err := json.Unmarshal(data, &pp); err != nil {
return err
}
np := Port(pp)
if err := np.assertValid(); err != nil {
return err
}
if np.Count == 0 {
np.Count = 1
}
*p = np
return nil
}
func (p Port) MarshalJSON() ([]byte, error) {
if err := p.assertValid(); err != nil {
return nil, err
}
return json.Marshal(port(p))
}
func (p Port) assertValid() error {
// Although there are no guarantees, most (if not all)
// transport protocols use 16 bit ports
if p.Port > 65535 || p.Port < 1 {
return errors.New("port must be in 1-65535 range")
}
if p.Port+p.Count > 65536 {
return errors.New("end of port range must be in 1-65535 range")
}
return nil
}
// PortFromString takes a command line port parameter and returns a port
//
// It is useful for actool patch-manifest --ports
//
// Example port parameters:
// health-check,protocol=udp,port=8000
// query,protocol=tcp,port=8080,count=1,socketActivated=true
func PortFromString(pt string) (*Port, error) {
var port Port
pt = "name=" + pt
ptQuery, err := common.MakeQueryString(pt)
if err != nil {
return nil, err
}
v, err := url.ParseQuery(ptQuery)
if err != nil {
return nil, err
}
for key, val := range v {
if len(val) > 1 {
return nil, fmt.Errorf("label %s with multiple values %q", key, val)
}
switch key {
case "name":
acn, err := NewACName(val[0])
if err != nil {
return nil, err
}
port.Name = *acn
case "protocol":
port.Protocol = val[0]
case "port":
p, err := strconv.ParseUint(val[0], 10, 16)
if err != nil {
return nil, err
}
port.Port = uint(p)
case "count":
cnt, err := strconv.ParseUint(val[0], 10, 16)
if err != nil {
return nil, err
}
port.Count = uint(cnt)
case "socketActivated":
sa, err := strconv.ParseBool(val[0])
if err != nil {
return nil, err
}
port.SocketActivated = sa
default:
return nil, fmt.Errorf("unknown port parameter %q", key)
}
}
err = port.assertValid()
if err != nil {
return nil, err
}
return &port, nil
}
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