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dns.go
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dns.go
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package tlb
import (
"fmt"
"github.com/tonkeeper/tongo/boc"
)
// DNSRecordSet
// _ (HashmapE 256 DNSRecord) = DNS_RecordSet;
type DNSRecordSet struct {
Records Hashmap[Bits256, Ref[DNSRecord]]
}
// DNSRecord
// dns_text#1eda _:Text = DNSRecord;
// dns_next_resolver#ba93 resolver:MsgAddressInt = DNSRecord; // usually in record #-1
// dns_adnl_address#ad01 adnl_addr:bits256 flags:(## 8) { flags <= 1 }
// proto_list:flags . 0?ProtoList = DNSRecord; // often in record #2
// dns_smc_address#9fd3 smc_addr:MsgAddressInt flags:(## 8) { flags <= 1 }
// cap_list:flags . 0?SmcCapList = DNSRecord; // often in record #1
// dns_storage_address#7473 bag_id:bits256 = DNSRecord;
type DNSRecord struct {
SumType
DNSText DNSText `tlbSumType:"dns_text#1eda"`
DNSNextResolver MsgAddress `tlbSumType:"dns_next_resolver#ba93"`
DNSAdnlAddress struct {
Address [32]byte
ProtoList []string
} `tlbSumType:"dns_adnl_address#ad01"`
DNSSmcAddress struct {
Address MsgAddress
SmcCapability SmcCapabilities
} `tlbSumType:"dns_smc_address#9fd3"`
DNSStorageAddress Bits256 `tlbSumType:"dns_storage_address#7473"`
NotStandard *boc.Cell // only for custom unmarshaling
}
func (r *DNSRecord) UnmarshalTLB(c *boc.Cell, decoder *Decoder) error {
t, err := c.ReadUint(16)
if err != nil {
return err
}
switch t {
case 0x1eda: // dns_text#1eda _:Text = DNSRecord;
var text DNSText
err := Unmarshal(c, &text)
if err != nil {
return err
}
r.SumType = "DNSText"
r.DNSText = text
return nil
case 0xba93: // dns_next_resolver#ba93 resolver:MsgAddressInt = DNSRecord; // usually in record #-1
var msgAddr MsgAddress
err := Unmarshal(c, &msgAddr)
if err != nil {
return err
}
r.SumType = "DNSNextResolver"
r.DNSNextResolver = msgAddr
return nil
case 0xad01:
res, err := readDnsAdnlAddress(c)
if err != nil {
return err
}
*r = res
return nil
case 0x9fd3: //dns_smc_address#9fd3 smc_addr:MsgAddressInt flags:(## 8) { flags <= 1 }
// cap_list:flags . 0?SmcCapList = DNSRecord; // often in record #1
res, err := readDNSSmcAddress(c)
if err != nil {
return err
}
*r = res
return nil
case 0x7473: // dns_storage_address#7473 bag_id:bits256 = DNSRecord;
addr, err := c.ReadBytes(32)
if err != nil {
return err
}
r.SumType = "DNSStorageAddress"
copy(r.DNSStorageAddress[:], addr[:])
return nil
}
c.ResetCounters()
r.SumType = "NotStandard"
r.NotStandard = c
return nil
}
// DNSText
// text$_ chunks:(## 8) rest:(TextChunks chunks) = Text;
type DNSText string
func (t *DNSText) UnmarshalTLB(c *boc.Cell, decoder *Decoder) error {
chunksQty, err := c.ReadUint(8)
if err != nil {
return err
}
res, err := readChunks(c, int(chunksQty))
if err != nil {
return err
}
*t = DNSText(res)
return nil
}
// chunk_ref$_ {n:#} ref:^(TextChunks (n + 1)) = TextChunkRef (n + 1);
// chunk_ref_empty$_ = TextChunkRef 0;
// text_chunk$_ {n:#} len:(## 8) data:(bits (len * 8)) next:(TextChunkRef n) = TextChunks (n + 1);
// text_chunk_empty$_ = TextChunks 0;
func readChunks(c *boc.Cell, chunksQty int) (string, error) {
if chunksQty == 0 {
return "", nil
}
ln, err := c.ReadUint(8)
if err != nil {
return "", err
}
data, err := c.ReadBytes(int(ln))
if err != nil {
return "", err
}
res := string(data)
if chunksQty > 1 {
next, err := c.NextRef()
if err != nil {
return "", err
}
nextChunk, err := readChunks(next, chunksQty-1)
if err != nil {
return "", err
}
res = res + nextChunk
}
return res, nil
}
// dns_adnl_address#ad01 adnl_addr:bits256 flags:(## 8) { flags <= 1 } // ad01 tag reading at upper level
// proto_list:flags . 0?ProtoList = DNSRecord; // often in record #2
// proto_list_nil$0 = ProtoList;
// proto_list_next$1 head:Protocol tail:ProtoList = ProtoList;
// proto_http#4854 = Protocol;
func readDnsAdnlAddress(c *boc.Cell) (DNSRecord, error) {
addr, err := c.ReadBytes(32)
if err != nil {
return DNSRecord{}, err
}
flags, err := c.ReadUint(8)
if err != nil {
return DNSRecord{}, err
}
if flags > 2 {
return DNSRecord{}, fmt.Errorf("invalid dns_adnl_address flags")
}
var protoList []string
if flags > 0 {
next, err := c.ReadBit()
if err != nil {
return DNSRecord{}, err
}
for next {
t, err := c.ReadUint(16)
if err != nil {
return DNSRecord{}, err
}
switch t {
case 0x4854:
protoList = append(protoList, "http")
}
next, err = c.ReadBit()
if err != nil {
return DNSRecord{}, err
}
}
}
var res DNSRecord
res.SumType = "DNSAdnlAddress"
copy(res.DNSAdnlAddress.Address[:], addr[:])
res.DNSAdnlAddress.ProtoList = protoList
return res, nil
}
// SmcCapabilities
// Reorganized SmcCapList type
// cap_list_nil$0 = SmcCapList;
// cap_list_next$1 head:SmcCapability tail:SmcCapList = SmcCapList;
// cap_method_seqno#5371 = SmcCapability;
// cap_method_pubkey#71f4 = SmcCapability;
// cap_is_wallet#2177 = SmcCapability;
// cap_name#ff name:Text = SmcCapability;
type SmcCapabilities struct {
Name []string
Interfaces []string
}
func readDNSSmcAddress(c *boc.Cell) (DNSRecord, error) {
var addr MsgAddress
err := Unmarshal(c, &addr)
if err != nil {
return DNSRecord{}, err
}
flags, err := c.ReadUint(8)
if err != nil {
return DNSRecord{}, err
}
if flags > 2 {
return DNSRecord{}, fmt.Errorf("invalid smc_addr flags")
}
var capabilities SmcCapabilities
var capability struct {
SumType
CapMethodSeqno struct{} `tlbSumType:"cap_method_seqno#5371"`
CapMethodPubkey struct{} `tlbSumType:"cap_method_pubkey#71f4"`
CapIsWallet struct{} `tlbSumType:"cap_is_wallet#2177"`
CapName DNSText `tlbSumType:"cap_name#ff"`
}
if flags > 0 {
next, err := c.ReadBit()
if err != nil {
return DNSRecord{}, err
}
for next {
err = Unmarshal(c, &capability)
if err != nil {
return DNSRecord{}, err
}
switch capability.SumType {
case "CapMethodSeqno":
capabilities.Interfaces = append(capabilities.Interfaces, "seqno")
case "CapMethodPubkey":
capabilities.Interfaces = append(capabilities.Interfaces, "pubkey")
case "CapIsWallet":
capabilities.Interfaces = append(capabilities.Interfaces, "wallet")
case "CapName":
capabilities.Name = append(capabilities.Name, string(capability.CapName))
}
next, err = c.ReadBit()
if err != nil {
return DNSRecord{}, err
}
}
}
var res DNSRecord
res.SumType = "DNSSmcAddress"
res.DNSSmcAddress.Address = addr
res.DNSSmcAddress.SmcCapability = capabilities
return res, nil
}