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protocol.go
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protocol.go
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// Copyright (c) 2016-2020 Tigera, Inc. All rights reserved.
// 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 numorstring
import "strings"
const (
ProtocolUDP = "UDP"
ProtocolTCP = "TCP"
ProtocolICMP = "ICMP"
ProtocolICMPv6 = "ICMPv6"
ProtocolSCTP = "SCTP"
ProtocolUDPLite = "UDPLite"
ProtocolUDPV1 = "udp"
ProtocolTCPV1 = "tcp"
ProtocolSCTPV1 = "sctp"
)
var (
allProtocolNames = []string{
ProtocolUDP,
ProtocolTCP,
ProtocolICMP,
ProtocolICMPv6,
ProtocolSCTP,
ProtocolUDPLite,
}
)
type Protocol Uint8OrString
// ProtocolFromInt creates a Protocol struct from an integer value.
func ProtocolFromInt(p uint8) Protocol {
return Protocol(
Uint8OrString{Type: NumOrStringNum, NumVal: p},
)
}
// ProtocolV3FromProtocolV1 creates a v3 Protocol from a v1 Protocol,
// while handling case conversion.
func ProtocolV3FromProtocolV1(p Protocol) Protocol {
if p.Type == NumOrStringNum {
return p
}
for _, n := range allProtocolNames {
if strings.EqualFold(n, p.StrVal) {
return Protocol(
Uint8OrString{Type: NumOrStringString, StrVal: n},
)
}
}
return p
}
// ProtocolFromString creates a Protocol struct from a string value.
func ProtocolFromString(p string) Protocol {
for _, n := range allProtocolNames {
if strings.EqualFold(n, p) {
return Protocol(
Uint8OrString{Type: NumOrStringString, StrVal: n},
)
}
}
// Unknown protocol - return the value unchanged. Validation should catch this.
return Protocol(
Uint8OrString{Type: NumOrStringString, StrVal: p},
)
}
// ProtocolFromStringV1 creates a Protocol struct from a string value (for the v1 API)
func ProtocolFromStringV1(p string) Protocol {
return Protocol(
Uint8OrString{Type: NumOrStringString, StrVal: strings.ToLower(p)},
)
}
// UnmarshalJSON implements the json.Unmarshaller interface.
func (p *Protocol) UnmarshalJSON(b []byte) error {
return (*Uint8OrString)(p).UnmarshalJSON(b)
}
// MarshalJSON implements the json.Marshaller interface.
func (p Protocol) MarshalJSON() ([]byte, error) {
return Uint8OrString(p).MarshalJSON()
}
// String returns the string value, or the Itoa of the int value.
func (p Protocol) String() string {
return (Uint8OrString)(p).String()
}
// String returns the string value, or the Itoa of the int value.
func (p Protocol) ToV1() Protocol {
if p.Type == NumOrStringNum {
return p
}
return ProtocolFromStringV1(p.StrVal)
}
// NumValue returns the NumVal if type Int, or if
// it is a String, will attempt a conversion to int.
func (p Protocol) NumValue() (uint8, error) {
return (Uint8OrString)(p).NumValue()
}
// SupportsProtocols returns whether this protocol supports ports. This returns true if
// the numerical or string version of the protocol indicates TCP (6), UDP (17), or SCTP (132).
func (p Protocol) SupportsPorts() bool {
num, err := p.NumValue()
if err == nil {
return num == 6 || num == 17 || num == 132
} else {
switch p.StrVal {
case ProtocolTCP, ProtocolUDP, ProtocolTCPV1, ProtocolUDPV1, ProtocolSCTP, ProtocolSCTPV1:
return true
}
return false
}
}
// OpenAPISchemaType is used by the kube-openapi generator when constructing
// the OpenAPI spec of this type.
// See: https://github.com/kubernetes/kube-openapi/tree/master/pkg/generators
func (_ Protocol) OpenAPISchemaType() []string { return []string{"string"} }
// OpenAPISchemaFormat is used by the kube-openapi generator when constructing
// the OpenAPI spec of this type.
// See: https://github.com/kubernetes/kube-openapi/tree/master/pkg/generators
func (_ Protocol) OpenAPISchemaFormat() string { return "int-or-string" }