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Use full node ID for CKR routes instead of truncated node IDs from the address/subnet

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This commit is contained in:
Neil Alexander 2018-11-07 10:04:31 +00:00
parent 39dab53ac7
commit fbfae473d4
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GPG Key ID: A02A2019A2BB0944
1 changed files with 37 additions and 20 deletions
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57
src/yggdrasil/router.go
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@ -125,20 +125,21 @@ func (r *router) sendPacket(bs []byte) {
panic("Tried to send a packet shorter than a header...")
}
var sourceAddr address
var dest address
var snet subnet
var destAddr address
var destSnet subnet
var destNodeID *NodeID
var addrlen int
if bs[0]&0xf0 == 0x60 {
// IPv6 address
addrlen = 16
copy(sourceAddr[:addrlen], bs[8:])
copy(dest[:addrlen], bs[24:])
copy(snet[:addrlen/2], bs[24:])
copy(destAddr[:addrlen], bs[24:])
copy(destSnet[:addrlen/2], bs[24:])
} else if bs[0]&0xf0 == 0x40 {
// IPv4 address
addrlen = 4
copy(sourceAddr[:addrlen], bs[12:])
copy(dest[:addrlen], bs[16:])
copy(destAddr[:addrlen], bs[16:])
} else {
// Unknown address length
return
@ -146,12 +147,13 @@ func (r *router) sendPacket(bs []byte) {
if !r.cryptokey.isValidSource(sourceAddr, addrlen) {
return
}
if !dest.isValid() && !snet.isValid() {
if key, err := r.cryptokey.getPublicKeyForAddress(dest, addrlen); err == nil {
addr := *address_addrForNodeID(getNodeID(&key))
copy(dest[:], addr[:])
copy(snet[:], addr[:])
if !dest.isValid() && !snet.isValid() {
if !destAddr.isValid() && !destSnet.isValid() {
if key, err := r.cryptokey.getPublicKeyForAddress(destAddr, addrlen); err == nil {
destNodeID = getNodeID(&key)
addr := *address_addrForNodeID(destNodeID)
copy(destAddr[:], addr[:])
copy(destSnet[:], addr[:])
if !destAddr.isValid() && !destSnet.isValid() {
return
}
} else {
@ -160,11 +162,26 @@ func (r *router) sendPacket(bs []byte) {
}
doSearch := func(packet []byte) {
var nodeID, mask *NodeID
if dest.isValid() {
nodeID, mask = dest.getNodeIDandMask()
}
if snet.isValid() {
nodeID, mask = snet.getNodeIDandMask()
switch {
case destNodeID != nil:
// We already know the full node ID, probably because it's from a CKR
// route in which the public key is known ahead of time
nodeID = destNodeID
var m NodeID
for i := range m {
m[i] = 0xFF
}
mask = &m
case destAddr.isValid():
// We don't know the full node ID - try and use the address to generate
// a truncated node ID
nodeID, mask = destAddr.getNodeIDandMask()
case destSnet.isValid():
// We don't know the full node ID - try and use the subnet to generate
// a truncated node ID
nodeID, mask = destSnet.getNodeIDandMask()
default:
return
}
sinfo, isIn := r.core.searches.searches[*nodeID]
if !isIn {
@ -177,11 +194,11 @@ func (r *router) sendPacket(bs []byte) {
}
var sinfo *sessionInfo
var isIn bool
if dest.isValid() {
sinfo, isIn = r.core.sessions.getByTheirAddr(&dest)
if destAddr.isValid() {
sinfo, isIn = r.core.sessions.getByTheirAddr(&destAddr)
}
if snet.isValid() {
sinfo, isIn = r.core.sessions.getByTheirSubnet(&snet)
if destSnet.isValid() {
sinfo, isIn = r.core.sessions.getByTheirSubnet(&destSnet)
}
switch {
case !isIn || !sinfo.init: