func GetIpinfoStartEndWithIPString(s string) (uint32, uint32) {
info, e := GetIPinfoWithString(s)
if e == nil && info != nil {
w, x, y, z := GetIpinfoStartEnd(info)
fmt.Println(utils.GetDebugLine(), w, x, y, z)
return w, y
} else {
fmt.Println(utils.GetDebugLine(), e)
return uint32(0), uint32(0)
}
}
func init() {
errCache := InitCache()
if errCache == nil {
utils.ServerLogger.Critical(utils.GetDebugLine(), "InitDomainRRCache OK")
utils.ServerLogger.Critical(utils.GetDebugLine(), "InitDomainSOACache OK")
} else {
//fmt.Println(utils.GetDebugLine(), "InitDomainRRCache() or InitDomainSOACache() failed")
//fmt.Println(utils.GetDebugLine(), "Plase contact [email protected] to get more help ")
utils.ServerLogger.Critical("InitDomainRRCache() or InitDomainSOACache() failed")
utils.ServerLogger.Info("Plase contact [email protected] to get more help")
os.Exit(2)
}
}
func GetAFromDNSBackend(
dst, srcIP string) (bool, []dns.RR, uint16, *MyError.MyError) {
var reE *MyError.MyError = nil
var rtype uint16
soa, e := GetSOARecord(dst)
utils.ServerLogger.Debug("GetSOARecord return: ", soa, " error: ", e)
if e != nil || len(soa.NS) <= 0 {
//GetSOA failed , need log and return
utils.ServerLogger.Error("GetSOARecord error: %s", e.Error())
return false, nil, dns.TypeNone, MyError.NewError(MyError.ERROR_UNKNOWN,
"GetARecord func GetSOARecord failed: "+dst)
}
var ns_a []string
//todo: is that soa.NS may nil ?
for _, x := range soa.NS {
ns_a = append(ns_a, x.Ns)
}
rr, edns_h, edns, e := QueryA(dst, srcIP, ns_a, query.NS_SERVER_PORT)
//todo: ends_h ends need to be parsed and returned!
utils.QueryLogger.Info("QueryA(): dst:", dst, "srcIP:", srcIP, "ns_a:", ns_a, " returned rr:", rr, "edns_h:", edns_h,
"edns:", edns, "e:", e)
if e == nil && rr != nil {
var rr_i []dns.RR
//todo:if you add both "A" and "CNAME" record to a domain name,this should be wrong!
if a, ok := ParseA(rr, dst); ok {
//rr is A record
utils.ServerLogger.Debug("GetAFromDNSBackend : typeA record: ", a, " dns.TypeA: ", ok)
for _, i := range a {
rr_i = append(rr_i, dns.RR(i))
}
//if A ,need parse edns client subnet
// return true,rr_i,nil
rtype = dns.TypeA
} else if b, ok := ParseCNAME(rr, dst); ok {
//rr is CNAME record
//fmt.Println(utils.GetDebugLine(), "GetAFromDNSBackend: typeCNAME record: ", b, " dns.TypeCNAME: ", ok)
utils.ServerLogger.Debug("GetAFromDNSBackend: typeCNAME record: ", b, " dns.TypeCNAME: ", ok)
//todo: if you add more than one "CNAME" record to a domain name ,this should be wrong,only the first one will be used!
//dst = b[0].Target
for _, i := range b {
rr_i = append(rr_i, dns.RR(i))
}
rtype = dns.TypeCNAME
reE = MyError.NewError(MyError.ERROR_NOTVALID,
"Got CNAME result for dst : "+dst+" with srcIP : "+srcIP)
//if CNAME need parse edns client subnet
} else {
//error return and retry
//fmt.Println(utils.GetDebugLine(), "GetAFromDNSBackend: ", rr)
utils.ServerLogger.Debug("GetAFromDNSBackend: ", rr)
return false, nil, dns.TypeNone, MyError.NewError(MyError.ERROR_NORESULT,
"Got error result, need retry for dst : "+dst+" with srcIP : "+srcIP)
}
utils.ServerLogger.Debug("Add A record to Region Cache: dst:", dst, "srcIP:", srcIP,
"rr_i:", rr_i, "ends_h", edns_h, "edns:", edns)
go AddAToRegionCache(dst, srcIP, rr_i, edns_h, edns)
return true, rr_i, rtype, reE
}
return false, nil, dns.TypeNone, MyError.NewError(MyError.ERROR_UNKNOWN, utils.GetDebugLine()+"Unknown error")
}
func GetAFromMySQLBackend(dst, srcIP string, regionTree *RegionTree) (bool, []dns.RR, uint16, *MyError.MyError) {
domainId, e := RRMySQL.GetDomainIDFromMySQL(dst)
if e != nil {
//todo:
//fmt.Println(utils.GetDebugLine(), "Error, GetDomainIDFromMySQL:", e)
return false, nil, uint16(0), e
}
region, ee := RRMySQL.GetRegionWithIPFromMySQL(utils.Ip4ToInt32(utils.StrToIP(srcIP)))
if ee != nil {
//fmt.Println(utils.GetDebugLine(), "Error GetRegionWithIPFromMySQL:", ee)
return false, nil, uint16(0), MyError.NewError(ee.ErrorNo, "GetRegionWithIPFromMySQL return "+ee.Error())
}
RR, eee := RRMySQL.GetRRFromMySQL(uint32(domainId), region.IdRegion)
if eee != nil && eee.ErrorNo == MyError.ERROR_NORESULT {
//fmt.Println(utils.GetDebugLine(), "Error GetRRFromMySQL with DomainID:", domainId,
// "RegionID:", region.IdRegion, eee)
//fmt.Println(utils.GetDebugLine(), "Try to GetRRFromMySQL with Default Region")
utils.ServerLogger.Debug("Try to GetRRFromMySQL with Default Region")
RR, eee = RRMySQL.GetRRFromMySQL(uint32(domainId), uint32(0))
if eee != nil {
//fmt.Println(utils.GetDebugLine(), "Error GetRRFromMySQL with DomainID:", domainId,
// "RegionID:", 0, eee)
return false, nil, uint16(0), MyError.NewError(eee.ErrorNo, "Error GetRRFromMySQL with DomainID:"+strconv.Itoa(domainId)+eee.Error())
}
} else if eee != nil {
utils.ServerLogger.Error(eee.Error())
return false, nil, uint16(0), eee
}
//fmt.Println(utils.GetDebugLine(), "GetRRFromMySQL Succ!:", RR)
utils.ServerLogger.Debug("GetRRFromMySQL Succ!: ", RR)
var R []dns.RR
var rtype uint16
var reE *MyError.MyError
hdr := dns.RR_Header{
Name: dst,
Class: RR.RR.Class,
Rrtype: RR.RR.RrType,
Ttl: RR.RR.Ttl,
}
//fmt.Println(utils.GetDebugLine(), mr.RR)
if RR.RR.RrType == dns.TypeA {
for _, mr := range RR.RR.Target {
rh := &dns.A{
Hdr: hdr,
A: utils.StrToIP(mr),
}
R = append(R, dns.RR(rh))
}
rtype = dns.TypeA
// fmt.Println(utils.GetDebugLine(), "Get A RR from MySQL, requery dst:", dst)
} else if RR.RR.RrType == dns.TypeCNAME {
for _, mr := range RR.RR.Target {
rh := &dns.CNAME{
Hdr: hdr,
Target: mr,
}
R = append(R, dns.RR(rh))
}
rtype = dns.TypeCNAME
//fmt.Println(utils.GetDebugLine(), "Get CNAME RR from MySQL, requery dst:", dst)
reE = MyError.NewError(MyError.ERROR_NOTVALID,
"Got CNAME result for dst : "+dst+" with srcIP : "+srcIP)
}
if len(R) > 0 {
//Add timer for auto refrech the RegionCache
go func(dst, srcIP string, r dns.RR, regionTree *RegionTree) {
//fmt.Println(utils.GetDebugLine(), " Refresh record after ", r.Header().Ttl-5,
// " Second, dst: ", dst, " srcIP: ", srcIP, "add timer ")
time.AfterFunc(time.Duration(r.Header().Ttl-5)*time.Second,
func() { GetAFromMySQLBackend(dst, srcIP, regionTree) })
}(dst, srcIP, R[0], regionTree)
go func(regionTree *RegionTree, R []dns.RR, srcIP string) {
//fmt.Println(utils.GetDebugLine(), "GetAFromMySQLBackend: ", e)
startIP, endIP := region.Region.StarIP, region.Region.EndIP
cidrmask := utils.GetCIDRMaskWithUint32Range(startIP, endIP)
//fmt.Println(utils.GetDebugLine(), " GetRegionWithIPFromMySQL with srcIP: ",
// srcIP, " StartIP : ", startIP, "==", utils.Int32ToIP4(startIP).String(),
// " EndIP: ", endIP, "==", utils.Int32ToIP4(endIP).String(), " cidrmask : ", cidrmask)
// netaddr, mask := DefaultNetaddr, DefaultMask
r, _ := NewRegion(R, startIP, cidrmask)
regionTree.AddRegionToCache(r)
//fmt.Println(utils.GetDebugLine(), "GetAFromMySQLBackend: ", r)
// fmt.Println(regionTree.GetRegionFromCacheWithAddr(startIP, cidrmask))
}(regionTree, R, srcIP)
return true, R, rtype, reE
}
return false, nil, uint16(0), MyError.NewError(MyError.ERROR_UNKNOWN, utils.GetDebugLine()+"Unknown Error ")
}