2c4ae3b0a4
Содержимое пина, зафиксированного в go.mod sing-box-lx, одним коммитом без истории. Полная история SagerNet/gvisor — 1.45 ГБ и клонируется в каждой CI-джобе; наша дельта — одна вставка в одну функцию, история для неё не нужна. Module path github.com/sagernet/gvisor сохранён намеренно: на него опирается replace-директива суперпроекта. Патч поверх — отдельным коммитом, чтобы дельта читалась одним git show и переносилась на новый пин копированием. SPECS/TASKS/048-GVISOR_HANDSHAKE_NIL_CRASH
75 lines
2.2 KiB
Go
75 lines
2.2 KiB
Go
// Copyright 2018 The gVisor 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.
|
|
|
|
package stack
|
|
|
|
import (
|
|
"github.com/sagernet/gvisor/pkg/tcpip"
|
|
"golang.org/x/time/rate"
|
|
)
|
|
|
|
const (
|
|
// icmpLimit is the default maximum number of ICMP messages permitted by this
|
|
// rate limiter.
|
|
icmpLimit = 1000
|
|
|
|
// icmpBurst is the default number of ICMP messages that can be sent in a single
|
|
// burst.
|
|
icmpBurst = 50
|
|
)
|
|
|
|
// ICMPRateLimiter is a global rate limiter that controls the generation of
|
|
// ICMP messages generated by the stack.
|
|
//
|
|
// +stateify savable
|
|
type ICMPRateLimiter struct {
|
|
// TODO(b/341946753): Restore when netstack is savable.
|
|
limiter *rate.Limiter `state:"nosave"`
|
|
clock tcpip.Clock
|
|
}
|
|
|
|
// NewICMPRateLimiter returns a global rate limiter for controlling the rate
|
|
// at which ICMP messages are generated by the stack. The returned limiter
|
|
// does not apply limits to any ICMP types by default.
|
|
func NewICMPRateLimiter(clock tcpip.Clock) *ICMPRateLimiter {
|
|
return &ICMPRateLimiter{
|
|
clock: clock,
|
|
limiter: rate.NewLimiter(icmpLimit, icmpBurst),
|
|
}
|
|
}
|
|
|
|
// SetLimit sets a new Limit for the limiter.
|
|
func (l *ICMPRateLimiter) SetLimit(limit rate.Limit) {
|
|
l.limiter.SetLimitAt(l.clock.Now(), limit)
|
|
}
|
|
|
|
// Limit returns the maximum overall event rate.
|
|
func (l *ICMPRateLimiter) Limit() rate.Limit {
|
|
return l.limiter.Limit()
|
|
}
|
|
|
|
// SetBurst sets a new burst size for the limiter.
|
|
func (l *ICMPRateLimiter) SetBurst(burst int) {
|
|
l.limiter.SetBurstAt(l.clock.Now(), burst)
|
|
}
|
|
|
|
// Burst returns the maximum burst size.
|
|
func (l *ICMPRateLimiter) Burst() int {
|
|
return l.limiter.Burst()
|
|
}
|
|
|
|
// Allow reports whether one ICMP message may be sent now.
|
|
func (l *ICMPRateLimiter) Allow() bool {
|
|
return l.limiter.AllowN(l.clock.Now(), 1)
|
|
}
|