github.com/mysteriumnetwork/node@v0.0.0-20240516044423-365054f76801/p2p/nat/manual.go (about)

     1  /*
     2   * Copyright (C) 2021 The "MysteriumNetwork/node" Authors.
     3   *
     4   * This program is free software: you can redistribute it and/or modify
     5   * it under the terms of the GNU General Public License as published by
     6   * the Free Software Foundation, either version 3 of the License, or
     7   * (at your option) any later version.
     8   *
     9   * This program is distributed in the hope that it will be useful,
    10   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    11   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    12   * GNU General Public License for more details.
    13   *
    14   * You should have received a copy of the GNU General Public License
    15   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    16   */
    17  
    18  package nat
    19  
    20  import (
    21  	"github.com/rs/zerolog/log"
    22  
    23  	"github.com/mysteriumnetwork/node/config"
    24  	"github.com/mysteriumnetwork/node/core/port"
    25  )
    26  
    27  type manualPort struct {
    28  	pool *port.Pool
    29  }
    30  
    31  // NewManualPortProvider creates new instance of the manual port provider.
    32  func NewManualPortProvider() PortProvider {
    33  	udpPortRange, err := port.ParseRange(config.GetString(config.FlagUDPListenPorts))
    34  	if err != nil {
    35  		log.Warn().Err(err).Msg("Failed to parse UDP listen port range, using default value")
    36  
    37  		udpPortRange, err = port.ParseRange("10000:60000")
    38  		if err != nil {
    39  			panic(err) // This must never happen.
    40  		}
    41  	}
    42  
    43  	return &manualPort{port.NewFixedRangePool(udpPortRange)}
    44  }
    45  
    46  func (mp *manualPort) PreparePorts() (ports []int, release func(), start StartPorts, err error) {
    47  	poolPorts, err := mp.pool.AcquireMultiple(requiredConnCount)
    48  	if err != nil {
    49  		return nil, nil, nil, err
    50  	}
    51  
    52  	for _, p := range poolPorts {
    53  		ports = append(ports, p.Num())
    54  	}
    55  
    56  	if err := checkAllPorts(ports); err != nil {
    57  		log.Debug().Err(err).Msgf("Failed to check manual ports %d globally", ports)
    58  		return nil, nil, nil, err
    59  	}
    60  
    61  	return ports, nil, nil, nil
    62  }