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dgram_bind.go
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/
dgram_bind.go
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// Copyright 2019 HAProxy Technologies
//
// 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 configuration
import (
"errors"
"fmt"
"strconv"
"strings"
strfmt "github.com/go-openapi/strfmt"
parser "github.com/haproxytech/config-parser/v4"
parser_errors "github.com/haproxytech/config-parser/v4/errors"
"github.com/haproxytech/config-parser/v4/params"
"github.com/haproxytech/config-parser/v4/types"
"github.com/haproxytech/client-native/v4/models"
)
type DgramBind interface {
GetDgramBinds(logForward string, transactionID string) (int64, models.DgramBinds, error)
GetDgramBind(name string, logForward string, transactionID string) (int64, *models.DgramBind, error)
DeleteDgramBind(name string, logForward string, transactionID string, version int64) error
CreateDgramBind(logForward string, data *models.DgramBind, transactionID string, version int64) error
EditDgramBind(name string, logForward string, data *models.DgramBind, transactionID string, version int64) error
}
// GetDgramBinds returns configuration version and an array of
// configured binds in the specified logForward. Returns error on fail.
func (c *client) GetDgramBinds(logForward string, transactionID string) (int64, models.DgramBinds, error) {
p, err := c.GetParser(transactionID)
if err != nil {
return 0, nil, err
}
v, err := c.GetVersion(transactionID)
if err != nil {
return 0, nil, err
}
binds, err := ParseDgramBinds(logForward, p)
if err != nil {
return v, nil, c.HandleError("", "log-forward", logForward, "", false, err)
}
return v, binds, nil
}
// GetDgramBind returns configuration version and a requested dgram-bind
// in the specified logForward. Returns error on fail or if dgram-bind does not exist.
func (c *client) GetDgramBind(name string, logForward string, transactionID string) (int64, *models.DgramBind, error) {
p, err := c.GetParser(transactionID)
if err != nil {
return 0, nil, err
}
v, err := c.GetVersion(transactionID)
if err != nil {
return 0, nil, err
}
dBind, _ := GetDgramBindByName(name, logForward, p)
if dBind == nil {
return v, nil, NewConfError(ErrObjectDoesNotExist, fmt.Sprintf("DgramBind %s does not exist in log-forward %s", name, logForward))
}
return v, dBind, nil
}
// DeleteDgramBind deletes a dgram-bind in configuration. One of version or transactionID is
// mandatory. Returns error on fail, nil on success.
func (c *client) DeleteDgramBind(name string, logForward string, transactionID string, version int64) error {
p, t, err := c.loadDataForChange(transactionID, version)
if err != nil {
return err
}
dBind, i := GetDgramBindByName(name, logForward, p)
if dBind == nil {
e := NewConfError(ErrObjectDoesNotExist, fmt.Sprintf("DgramBind %s does not exist in log-forward %s", name, logForward))
return c.HandleError(name, "log-forward", logForward, t, transactionID == "", e)
}
if err := p.Delete(parser.LogForward, logForward, "dgram-bind", i); err != nil {
return c.HandleError(name, "log-forward", logForward, t, transactionID == "", err)
}
if err := c.SaveData(p, t, transactionID == ""); err != nil {
return err
}
return nil
}
// CreateDgramBind creates a dgram-bind in configuration. One of version or transactionID is
// mandatory. Returns error on fail, nil on success.
func (c *client) CreateDgramBind(logForward string, data *models.DgramBind, transactionID string, version int64) error {
if c.UseModelsValidation {
validationErr := data.Validate(strfmt.Default)
if validationErr != nil {
return NewConfError(ErrValidationError, validationErr.Error())
}
validationErr = validateDgramBindParams(data)
if validationErr != nil {
return NewConfError(ErrValidationError, validationErr.Error())
}
}
p, t, err := c.loadDataForChange(transactionID, version)
if err != nil {
return err
}
dBind, _ := GetDgramBindByName(data.Name, logForward, p)
if dBind != nil {
e := NewConfError(ErrObjectAlreadyExists, fmt.Sprintf("DgramBind %s already exists in log-forward %s", data.Name, logForward))
return c.HandleError(data.Name, "log-forward", logForward, t, transactionID == "", e)
}
if err := p.Insert(parser.LogForward, logForward, "dgram-bind", SerializeDgramBind(*data), -1); err != nil {
return c.HandleError(data.Name, "log-forward", logForward, t, transactionID == "", err)
}
if err := c.SaveData(p, t, transactionID == ""); err != nil {
return err
}
return nil
}
// EditDgramBind edits a dgram-bind in configuration. One of version or transactionID is
// mandatory. Returns error on fail, nil on success.
func (c *client) EditDgramBind(name string, logForward string, data *models.DgramBind, transactionID string, version int64) error {
if c.UseModelsValidation {
validationErr := data.Validate(strfmt.Default)
if validationErr != nil {
return NewConfError(ErrValidationError, validationErr.Error())
}
validationErr = validateDgramBindParams(data)
if validationErr != nil {
return NewConfError(ErrValidationError, validationErr.Error())
}
}
p, t, err := c.loadDataForChange(transactionID, version)
if err != nil {
return err
}
dBind, i := GetDgramBindByName(name, logForward, p)
if dBind == nil {
e := NewConfError(ErrObjectDoesNotExist, fmt.Sprintf("DgramBind %v does not exist in log-forward %s", name, logForward))
return c.HandleError(data.Name, "log-forward", logForward, t, transactionID == "", e)
}
if err := p.Set(parser.LogForward, logForward, "dgram-bind", SerializeDgramBind(*data), i); err != nil {
return c.HandleError(data.Name, "log-forward", logForward, t, transactionID == "", err)
}
if err := c.SaveData(p, t, transactionID == ""); err != nil {
return err
}
return nil
}
func ParseDgramBinds(logForward string, p parser.Parser) (models.DgramBinds, error) {
dBinds := models.DgramBinds{}
data, err := p.Get(parser.LogForward, logForward, "dgram-bind", false)
if err != nil {
if errors.Is(err, parser_errors.ErrFetch) {
return dBinds, nil
}
return nil, err
}
ondiskBinds := data.([]types.DgramBind) //nolint:forcetypeassert
for _, ondiskBind := range ondiskBinds {
b := ParseDgramBind(ondiskBind)
if b != nil {
dBinds = append(dBinds, b)
}
}
return dBinds, nil
}
func ParseDgramBind(ondiskDgramBind types.DgramBind) *models.DgramBind { //nolint:gocognit
b := &models.DgramBind{}
if strings.HasPrefix(ondiskDgramBind.Path, "/") {
b.Address = ondiskDgramBind.Path
} else {
addSlice := strings.Split(ondiskDgramBind.Path, ":")
switch n := len(addSlice); {
case n == 0:
return nil
case n == 4: // :::443
b.Address = "::"
if addSlice[3] != "" {
p, err := strconv.ParseInt(addSlice[3], 10, 64)
if err == nil {
b.Port = &p
}
}
case n > 1:
b.Address = addSlice[0]
ports := strings.Split(addSlice[1], "-")
// *:<port>
if ports[0] != "" {
port, err := strconv.ParseInt(ports[0], 10, 64)
if err == nil {
b.Port = &port
}
}
// *:<port-first>-<port-last>
if b.Port != nil && len(ports) == 2 {
portRangeEnd, err := strconv.ParseInt(ports[1], 10, 64)
// Deny inverted interval.
if err == nil && (*b.Port < portRangeEnd) {
b.PortRangeEnd = &portRangeEnd
}
}
case n > 0:
b.Address = addSlice[0]
}
}
for _, p := range ondiskDgramBind.Params {
switch v := p.(type) {
case *params.BindOptionWord:
if v.Name == "transparent" {
b.Transparent = true
}
case *params.BindOptionValue:
switch v.Name {
case "name":
b.Name = v.Value
case "interface":
b.Interface = v.Value
case "namespace":
b.Namespace = v.Value
}
}
}
if b.Name == "" {
b.Name = ondiskDgramBind.Path
}
return b
}
func SerializeDgramBind(b models.DgramBind) types.DgramBind {
dBind := types.DgramBind{
Params: []params.DgramBindOption{},
}
if b.Port != nil {
dBind.Path = b.Address + ":" + strconv.FormatInt(*b.Port, 10)
if b.PortRangeEnd != nil {
dBind.Path = dBind.Path + "-" + strconv.FormatInt(*b.PortRangeEnd, 10)
}
} else {
dBind.Path = b.Address
}
dBind.Params = []params.DgramBindOption{}
if b.Name != "" {
dBind.Params = append(dBind.Params, ¶ms.BindOptionValue{Name: "name", Value: b.Name})
} else if dBind.Path != "" {
dBind.Params = append(dBind.Params, ¶ms.BindOptionValue{Name: "name", Value: dBind.Path})
}
if b.Transparent {
dBind.Params = append(dBind.Params, ¶ms.BindOptionWord{Name: "transparent"})
}
if b.Interface != "" {
dBind.Params = append(dBind.Params, ¶ms.BindOptionValue{Name: "interface", Value: b.Interface})
}
if b.Namespace != "" {
dBind.Params = append(dBind.Params, ¶ms.BindOptionValue{Name: "namespace", Value: b.Namespace})
}
return dBind
}
func GetDgramBindByName(name string, logForward string, p parser.Parser) (*models.DgramBind, int) {
dBinds, err := ParseDgramBinds(logForward, p)
if err != nil {
return nil, 0
}
for i, b := range dBinds {
if b.Name == name {
return b, i
}
}
return nil, 0
}
func validateDgramBindParams(data *models.DgramBind) error {
if data.Port != nil {
if data.PortRangeEnd != nil && *data.PortRangeEnd <= *data.Port {
return fmt.Errorf("port upper bound %d less or equal than lower bound %d in dgram-bind %s", *data.PortRangeEnd, *data.Port, data.Name)
}
return nil
}
if data.Address != "" {
return nil
}
return fmt.Errorf("missing port or address in dgram-bind %s", data.Name)
}