yggdrasil-network/yggdrasil-go
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WIP moving IP-specific checks from tuntap to core

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This commit is contained in:
Arceliar 2021-06-13 04:22:21 -05:00
parent bb66851c2b
commit 1147ee1934
9 changed files with 339 additions and 220 deletions
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38
src/tuntap/tun.go
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@ -189,41 +189,3 @@ func (tun *TunAdapter) _stop() error {
return nil
}
func (tun *TunAdapter) oobHandler(fromKey, toKey ed25519.PublicKey, data []byte) {
if len(data) != 1+ed25519.SignatureSize {
return
}
sig := data[1:]
switch data[0] {
case typeKeyLookup:
snet := *address.SubnetForKey(toKey)
if snet == tun.subnet && ed25519.Verify(fromKey, toKey[:], sig) {
// This is looking for at least our subnet (possibly our address)
// Send a response
tun.sendKeyResponse(fromKey)
}
case typeKeyResponse:
// TODO keep a list of something to match against...
// Ignore the response if it doesn't match anything of interest...
if ed25519.Verify(fromKey, toKey[:], sig) {
tun.store.update(fromKey)
}
}
}
func (tun *TunAdapter) sendKeyLookup(partial ed25519.PublicKey) {
sig := ed25519.Sign(tun.core.PrivateKey(), partial[:])
bs := append([]byte{typeKeyLookup}, sig...)
_ = tun.core.SendOutOfBand(partial, bs)
}
func (tun *TunAdapter) sendKeyResponse(dest ed25519.PublicKey) {
sig := ed25519.Sign(tun.core.PrivateKey(), dest[:])
bs := append([]byte{typeKeyResponse}, sig...)
_ = tun.core.SendOutOfBand(dest, bs)
}
func (tun *TunAdapter) maxSessionMTU() uint64 {
const sessionTypeOverhead = 1
return tun.core.MTU() - sessionTypeOverhead
}