/
net_port.go
84 lines (69 loc) · 1.69 KB
/
net_port.go
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// Copyright 2021 Matrix Origin
//
// 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 fz
import (
"net"
"strconv"
"sync"
"sync/atomic"
)
type PortRange [2]uint16
func (_ Def) PortRange() PortRange {
return PortRange{20000, 50000}
}
type GetPort func(nodeID NodeID, host string) uint16
type GetPortStr func(nodeID NodeID, host string) string
var nextPort uint32
func (_ Def) GetPort(
portRange PortRange,
infos PortInfos,
) (
get GetPort,
getStr GetPortStr,
) {
lower := uint16(portRange[0])
mod := uint16(portRange[1] - portRange[0])
get = func(nodeID NodeID, host string) uint16 {
gen:
port := lower + uint16(atomic.AddUint32(&nextPort, 5))%mod
// try listen
ln, err := net.Listen("tcp", net.JoinHostPort(host, strconv.Itoa(int(port))))
if err != nil {
goto gen
}
ce(ln.Close())
info := &PortInfo{
Port: port,
NodeID: nodeID,
}
infos.Store(port, info)
return port
}
getStr = func(nodeID NodeID, host string) string {
return strconv.Itoa(int(get(nodeID, host)))
}
return
}
type PortInfo struct {
Port uint16
NodeID NodeID
}
type PortInfos struct {
*sync.Map
}
func (_ Def) PortInfos() PortInfos {
return PortInfos{
Map: new(sync.Map),
}
}