github.com/mysteriumnetwork/node@v0.0.0-20240516044423-365054f76801/services/wireguard/endpoint/netstack-provider/shaper_service.go (about)

     1  /*
     2   * Copyright (C) 2022 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 netstack_provider
    19  
    20  import (
    21  	"github.com/mysteriumnetwork/node/config"
    22  	"github.com/mysteriumnetwork/node/eventbus"
    23  	"github.com/rs/zerolog/log"
    24  	"golang.org/x/time/rate"
    25  )
    26  
    27  const AppTopicConfigShaper = "config:shaper"
    28  
    29  var rateLimiter *rate.Limiter
    30  
    31  func getRateLimitter() *rate.Limiter {
    32  	return rateLimiter
    33  }
    34  
    35  func InitUserspaceShaper(eventBus eventbus.EventBus) {
    36  	applyLimits := func(e interface{}) {
    37  		bandwidthBytes := config.GetUInt64(config.FlagShaperBandwidth) * 1024
    38  		bandwidth := rate.Limit(bandwidthBytes)
    39  		if !config.GetBool(config.FlagShaperEnabled) {
    40  			bandwidth = rate.Inf
    41  		}
    42  		log.Info().Msgf("Shaper bandwidth: %v", config.GetUInt64(config.FlagShaperBandwidth))
    43  		rateLimiter.SetLimit(bandwidth)
    44  	}
    45  
    46  	rateLimiter = rate.NewLimiter(rate.Inf, 0)
    47  	applyLimits(nil)
    48  
    49  	err := eventBus.SubscribeAsync(AppTopicConfigShaper, applyLimits)
    50  	if err != nil {
    51  		log.Error().Msgf("could not subscribe to topic: %v", err)
    52  	}
    53  }