/usr/share/gocode/src/github.com/AudriusButkevicius/kcp-go/blacklist.go is in golang-github-audriusbutkevicius-kcp-go-dev 20160629+git20171025.8ae5f52-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | package kcp
import (
"sync"
"time"
)
var (
BlacklistDuration time.Duration
blacklist = blacklistMap{
entries: make(map[sessionKey]time.Time),
}
)
// a global map for blacklisting conversations
type blacklistMap struct {
entries map[sessionKey]time.Time
reapAt time.Time
mut sync.Mutex
}
func (m *blacklistMap) add(address string, conv uint32) {
if BlacklistDuration == 0 {
return
}
m.mut.Lock()
timeout := time.Now().Add(BlacklistDuration)
m.entries[sessionKey{
addr: address,
convID: conv,
}] = timeout
m.reap()
m.mut.Unlock()
}
func (m *blacklistMap) has(address string, conv uint32) bool {
if BlacklistDuration == 0 {
return false
}
m.mut.Lock()
t, ok := m.entries[sessionKey{
addr: address,
convID: conv,
}]
m.mut.Unlock()
return ok && t.After(time.Now())
}
func (m *blacklistMap) reap() {
now := time.Now()
for k, t := range m.entries {
if t.Before(now) {
delete(m.entries, k)
}
}
}
|