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version_cmd.go
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version_cmd.go
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// Copyright (c) 2019 The BFE 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.
// Copyright (c) pires.
//
// 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 bfe_proxy
// ProtocolVersionAndCommand represents proxy protocol version and command.
type ProtocolVersionAndCommand byte
const (
LOCAL = '\x20'
PROXY = '\x21'
)
var supportedCommand = map[ProtocolVersionAndCommand]bool{
LOCAL: true,
PROXY: true,
}
// IsLocal returns true if the protocol version is \x2 and command is LOCAL, false otherwise.
func (pvc ProtocolVersionAndCommand) IsLocal() bool {
return 0x20 == pvc&0xF0 && 0x00 == pvc&0x0F
}
// IsProxy returns true if the protocol version is \x2 and command is PROXY, false otherwise.
func (pvc ProtocolVersionAndCommand) IsProxy() bool {
return 0x20 == pvc&0xF0 && 0x01 == pvc&0x0F
}
// IsUnspec returns true if the protocol version or command is unspecified, false otherwise.
func (pvc ProtocolVersionAndCommand) IsUnspec() bool {
return !(pvc.IsLocal() || pvc.IsProxy())
}
func (pvc ProtocolVersionAndCommand) toByte() byte {
if pvc.IsLocal() {
return LOCAL
} else if pvc.IsProxy() {
return PROXY
}
return LOCAL
}