mirror of
https://github.com/yggdrasil-network/yggdrasil-go.git
synced 2025-11-04 11:15:07 +03:00
(broken state) WIP address migration
This commit is contained in:
Arceliar
parent
ae96148008
commit
ace7b43b6d
9 changed files with 73 additions and 120 deletions
|
|
@ -3,9 +3,7 @@
|
|||
package address
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
|
||||
"github.com/yggdrasil-network/yggdrasil-go/src/crypto"
|
||||
"crypto/ed25519"
|
||||
)
|
||||
|
||||
// Address represents an IPv6 address in the yggdrasil address range.
|
||||
|
|
@ -45,25 +43,34 @@ func (s *Subnet) IsValid() bool {
|
|||
return (*s)[l-1] == prefix[l-1]|0x01
|
||||
}
|
||||
|
||||
// AddrForNodeID takes a *NodeID as an argument and returns an *Address.
|
||||
// AddrForKey takes an ed25519.PublicKey as an argument and returns an *Address.
|
||||
// This function returns nil if the key length is not ed25519.PublicKeySize.
|
||||
// This address begins with the contents of GetPrefix(), with the last bit set to 0 to indicate an address.
|
||||
// The following 8 bits are set to the number of leading 1 bits in the NodeID.
|
||||
// The NodeID, excluding the leading 1 bits and the first leading 0 bit, is truncated to the appropriate length and makes up the remainder of the address.
|
||||
func AddrForNodeID(nid *crypto.NodeID) *Address {
|
||||
// The following 8 bits are set to the number of leading 1 bits in the bitwise inverse of the public key.
|
||||
// The bitwise inverse of the key, excluding the leading 1 bits and the first leading 0 bit, is truncated to the appropriate length and makes up the remainder of the address.
|
||||
func AddrForKey(publicKey ed25519.PublicKey) *Address {
|
||||
// 128 bit address
|
||||
// Begins with prefix
|
||||
// Next bit is a 0
|
||||
// Next 7 bits, interpreted as a uint, are # of leading 1s in the NodeID
|
||||
// Leading 1s and first leading 0 of the NodeID are truncated off
|
||||
// The rest is appended to the IPv6 address (truncated to 128 bits total)
|
||||
if len(publicKey) != ed25519.PublicKeySize {
|
||||
return nil
|
||||
}
|
||||
var buf [ed25519.PublicKeySize]byte
|
||||
copy(buf[:], publicKey)
|
||||
for idx := range buf {
|
||||
buf[idx] = ^buf[idx]
|
||||
}
|
||||
var addr Address
|
||||
var temp []byte
|
||||
done := false
|
||||
ones := byte(0)
|
||||
bits := byte(0)
|
||||
nBits := 0
|
||||
for idx := 0; idx < 8*len(nid); idx++ {
|
||||
bit := (nid[idx/8] & (0x80 >> byte(idx%8))) >> byte(7-(idx%8))
|
||||
for idx := 0; idx < 8*len(buf); idx++ {
|
||||
bit := (buf[idx/8] & (0x80 >> byte(idx%8))) >> byte(7-(idx%8))
|
||||
if !done && bit != 0 {
|
||||
ones++
|
||||
continue
|
||||
|
|
@ -86,91 +93,22 @@ func AddrForNodeID(nid *crypto.NodeID) *Address {
|
|||
return &addr
|
||||
}
|
||||
|
||||
// SubnetForNodeID takes a *NodeID as an argument and returns an *Address.
|
||||
// This subnet begins with the address prefix, with the last bit set to 1 to indicate a prefix.
|
||||
// The following 8 bits are set to the number of leading 1 bits in the NodeID.
|
||||
// The NodeID, excluding the leading 1 bits and the first leading 0 bit, is truncated to the appropriate length and makes up the remainder of the subnet.
|
||||
func SubnetForNodeID(nid *crypto.NodeID) *Subnet {
|
||||
// SubnetForKey takes an ed25519.PublicKey as an argument and returns a *Subnet.
|
||||
// This function returns nil if the key length is not ed25519.PublicKeySize.
|
||||
// The subnet begins with the address prefix, with the last bit set to 1 to indicate a prefix.
|
||||
// The following 8 bits are set to the number of leading 1 bits in the bitwise inverse of the key.
|
||||
// The bitwise inverse of the key, excluding the leading 1 bits and the first leading 0 bit, is truncated to the appropriate length and makes up the remainder of the subnet.
|
||||
func SubnetForKey(publicKey ed25519.PublicKey) *Subnet {
|
||||
// Exactly as the address version, with two exceptions:
|
||||
// 1) The first bit after the fixed prefix is a 1 instead of a 0
|
||||
// 2) It's truncated to a subnet prefix length instead of 128 bits
|
||||
addr := *AddrForNodeID(nid)
|
||||
addr := AddrForKey(publicKey)
|
||||
if addr == nil {
|
||||
return nil
|
||||
}
|
||||
var snet Subnet
|
||||
copy(snet[:], addr[:])
|
||||
prefix := GetPrefix()
|
||||
snet[len(prefix)-1] |= 0x01
|
||||
return &snet
|
||||
}
|
||||
|
||||
// GetNodeIDandMask returns two *NodeID.
|
||||
// The first is a NodeID with all the bits known from the Address set to their correct values.
|
||||
// The second is a bitmask with 1 bit set for each bit that was known from the Address.
|
||||
// This is used to look up NodeIDs in the DHT and tell if they match an Address.
|
||||
func (a *Address) GetNodeIDandMask() (*crypto.NodeID, *crypto.NodeID) {
|
||||
// Mask is a bitmask to mark the bits visible from the address
|
||||
// This means truncated leading 1s, first leading 0, and visible part of addr
|
||||
var nid crypto.NodeID
|
||||
var mask crypto.NodeID
|
||||
prefix := GetPrefix()
|
||||
ones := int(a[len(prefix)])
|
||||
for idx := 0; idx < ones; idx++ {
|
||||
nid[idx/8] |= 0x80 >> byte(idx%8)
|
||||
}
|
||||
nidOffset := ones + 1
|
||||
addrOffset := 8*len(prefix) + 8
|
||||
for idx := addrOffset; idx < 8*len(a); idx++ {
|
||||
bits := a[idx/8] & (0x80 >> byte(idx%8))
|
||||
bits <<= byte(idx % 8)
|
||||
nidIdx := nidOffset + (idx - addrOffset)
|
||||
bits >>= byte(nidIdx % 8)
|
||||
nid[nidIdx/8] |= bits
|
||||
}
|
||||
maxMask := 8*(len(a)-len(prefix)-1) + ones + 1
|
||||
for idx := 0; idx < maxMask; idx++ {
|
||||
mask[idx/8] |= 0x80 >> byte(idx%8)
|
||||
}
|
||||
return &nid, &mask
|
||||
}
|
||||
|
||||
// GetNodeIDLengthString returns a string representation of the known bits of the NodeID, along with the number of known bits, for use with yggdrasil.Dialer's Dial and DialContext functions.
|
||||
func (a *Address) GetNodeIDLengthString() string {
|
||||
nid, mask := a.GetNodeIDandMask()
|
||||
l := mask.PrefixLength()
|
||||
return fmt.Sprintf("%s/%d", nid.String(), l)
|
||||
}
|
||||
|
||||
// GetNodeIDandMask returns two *NodeID.
|
||||
// The first is a NodeID with all the bits known from the Subnet set to their correct values.
|
||||
// The second is a bitmask with 1 bit set for each bit that was known from the Subnet.
|
||||
// This is used to look up NodeIDs in the DHT and tell if they match a Subnet.
|
||||
func (s *Subnet) GetNodeIDandMask() (*crypto.NodeID, *crypto.NodeID) {
|
||||
// As with the address version, but visible parts of the subnet prefix instead
|
||||
var nid crypto.NodeID
|
||||
var mask crypto.NodeID
|
||||
prefix := GetPrefix()
|
||||
ones := int(s[len(prefix)])
|
||||
for idx := 0; idx < ones; idx++ {
|
||||
nid[idx/8] |= 0x80 >> byte(idx%8)
|
||||
}
|
||||
nidOffset := ones + 1
|
||||
addrOffset := 8*len(prefix) + 8
|
||||
for idx := addrOffset; idx < 8*len(s); idx++ {
|
||||
bits := s[idx/8] & (0x80 >> byte(idx%8))
|
||||
bits <<= byte(idx % 8)
|
||||
nidIdx := nidOffset + (idx - addrOffset)
|
||||
bits >>= byte(nidIdx % 8)
|
||||
nid[nidIdx/8] |= bits
|
||||
}
|
||||
maxMask := 8*(len(s)-len(prefix)-1) + ones + 1
|
||||
for idx := 0; idx < maxMask; idx++ {
|
||||
mask[idx/8] |= 0x80 >> byte(idx%8)
|
||||
}
|
||||
return &nid, &mask
|
||||
}
|
||||
|
||||
// GetNodeIDLengthString returns a string representation of the known bits of the NodeID, along with the number of known bits, for use with yggdrasil.Dialer's Dial and DialContext functions.
|
||||
func (s *Subnet) GetNodeIDLengthString() string {
|
||||
nid, mask := s.GetNodeIDandMask()
|
||||
l := mask.PrefixLength()
|
||||
return fmt.Sprintf("%s/%d", nid.String(), l)
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue