115 lines
2.5 KiB
Go
115 lines
2.5 KiB
Go
package ruleComposer
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import (
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"bytes"
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"net"
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"sync"
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"time"
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)
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type Records struct {
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mutex sync.RWMutex
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ipv4Addresses map[string]map[string]time.Time
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cNames map[string]map[string]time.Time
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}
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func (r *Records) getCNames(domainName string) []string {
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_, ok := r.cNames[domainName]
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if !ok {
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return nil
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}
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cNameList := make([]string, 0, len(r.cNames[domainName]))
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for cname, ttl := range r.cNames[domainName] {
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if time.Now().Sub(ttl).Nanoseconds() < 0 {
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cNameList = append(cNameList, cname)
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}
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}
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origCNameLen := len(cNameList)
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for i := 0; i < origCNameLen; i++ {
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parentList := r.getCNames(cNameList[i])
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if parentList != nil {
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cNameList = append(cNameList, parentList...)
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}
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}
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return cNameList
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}
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func (r *Records) GetIPv4Addresses(domainName string) []net.IP {
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r.mutex.RLock()
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defer r.mutex.RUnlock()
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cNameList := append([]string{domainName}, r.getCNames(domainName)...)
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ipAddresses := make([]net.IP, 0)
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for _, cName := range cNameList {
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addresses, ok := r.ipv4Addresses[cName]
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if !ok {
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continue
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}
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addressesNetIP := make([]net.IP, 0, len(addresses))
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for addr, ttl := range addresses {
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if time.Now().Sub(ttl).Nanoseconds() < 0 {
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addressesNetIP = append(addressesNetIP, []byte(addr))
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}
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}
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ipAddresses = append(ipAddresses, addressesNetIP...)
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}
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return ipAddresses
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}
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func (r *Records) PutCName(domainName string, cName string, ttl int64) {
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r.mutex.Lock()
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defer r.mutex.Unlock()
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if r.cNames[domainName] == nil {
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r.cNames[domainName] = make(map[string]time.Time)
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}
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skipPut := false
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for name, _ := range r.cNames[domainName] {
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if name == cName {
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r.cNames[domainName][name] = time.Now().Add(time.Second * time.Duration(ttl))
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skipPut = true
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break
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}
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}
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if !skipPut {
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r.cNames[domainName][cName] = time.Now().Add(time.Second * time.Duration(ttl))
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}
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}
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func (r *Records) PutIPv4Address(domainName string, addr net.IP, ttl int64) {
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r.mutex.Lock()
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defer r.mutex.Unlock()
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if r.ipv4Addresses[domainName] == nil {
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r.ipv4Addresses[domainName] = make(map[string]time.Time)
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}
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skipPut := false
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for address, _ := range r.ipv4Addresses[domainName] {
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if bytes.Compare([]byte(address), addr) == 0 {
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r.ipv4Addresses[domainName][address] = time.Now().Add(time.Second * time.Duration(ttl))
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skipPut = true
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break
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}
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}
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if !skipPut {
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r.ipv4Addresses[domainName][string(addr)] = time.Now().Add(time.Second * time.Duration(ttl))
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}
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}
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func NewRecords() *Records {
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return &Records{
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ipv4Addresses: make(map[string]map[string]time.Time),
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cNames: make(map[string]map[string]time.Time),
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}
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}
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