// applyDeltaOnce pushes one piece of info into the network
func (srv *Server) applyDeltaOnce(key ChordKey, meta Neighbor) {
kilog.Debug("directory: beginning push to %x", key.ToBytes())
rawsok, err := kiricom.EasyDial(fmt.Sprintf("%v:%v", meta.Address, meta.Port),
nil,
meta.Secret)
if err != nil {
kilog.Debug("directory: push to %x failed due to %v", key.ToBytes(), err.Error())
return
}
defer rawsok.Close()
sok, err := kiss.KiSSAnonHandshake(kiss.NewDirectVerifier(meta.PubKey), rawsok)
if err != nil {
kilog.Debug("directory: push to %x failed in KiSS due to %v", key.ToBytes(), err.Error())
return
}
defer sok.Close()
srv.Lock()
neighs, err := srv.crd.Neighs(key)
if err != nil {
panic("WTF is going on here")
}
srv.Unlock()
var msg textprot.NeighInfo
// expires 1hr from now
msg.Json.Expires = int(time.Now().Add(time.Hour).Unix())
msg.Json.IssuedTo = meta.PubKey
for _, nay := range neighs {
msg.Json.NeighList = append(msg.Json.NeighList, nay.ToBytes())
}
msg.Signat = srv.prv.Sign(msg.Json.HashValue())
// send the message
req := textprot.TextReq{
Verb: "NEIGH_PUSH",
Blob: msg.ToString(),
}
err = req.WriteTo(sok)
if err != nil {
kilog.Debug("directory: push to %x failed while pushing due to %v", key.ToBytes(), err.Error())
return
}
//fmt.Println(msg.ToString())
// get msg back
err = req.ReadFrom(sok)
if err != nil {
kilog.Debug("directory: push to %x failed at the final stage", key.ToBytes())
return
}
kilog.Debug("directory: push to %x succeeded", key.ToBytes())
}
func (ns *NodeState) do_NEIGH_LIST(sok io.ReadWriteCloser, req textprot.TextReq) (err error) {
var response textprot.TextReq
defer func() {
err = response.WriteTo(sok)
}()
ns.RLock()
defer ns.RUnlock()
if ns.sigNeighs.Signat == nil {
response = textprot.TextReq{Verb: "NOPE"}
return
}
// signeighs is fine now, let's do the magic!
response = textprot.TextReq{
Verb: "OKAY",
Blob: ns.sigNeighs.ToString(),
}
return
}
func (clnt *Client) execCmd(req textprot.TextReq) (resp textprot.TextReq, err error) {
err = req.WriteTo(clnt.sok)
if err != nil {
clnt.sok.Close()
err = ErrBadSocket
return
}
err = resp.ReadFrom(clnt.sok)
if err != nil {
clnt.sok.Close()
err = ErrBadSocket
return
}
fmt.Println(resp)
if resp.Verb != "OKAY" {
err = ErrRejectedReq
return
}
return
}
// HandleClient is to be called on every incoming connection. It handles KiSS
// but nothing underneath it.
func (ns *NodeState) HandleClient(rawsock io.ReadWriteCloser) error {
defer rawsock.Close()
// Do a named KiSS handshake without authentication of the other party
sok, err := kiss.KiSSNamedHandshake(ns.client.GetPrivate(), nil, rawsock)
if err != nil {
return errors.New(fmt.Sprintf("core2core: incoming KiSS handshake failed: %v", err.Error()))
}
// Request dispatch loop
for {
var req textprot.TextReq
err := req.ReadFrom(sok)
if err != nil {
return nil
}
err = ns.dispatchReq(sok, req)
if err != nil {
return err
}
}
}
func (ns *NodeState) do_NEIGH_CONNECT(sok io.ReadWriteCloser, req textprot.TextReq) (err error) {
// decode the hex
if len(req.Args) == 0 {
err = errors.New("core2core: server got truncated NEIGH_CONNECT")
return
}
hexstr := req.Args[0]
bts, err := hex.DecodeString(hexstr)
if err != nil {
return
}
kilog.Debug("core2core: NEIGH_CONNECT received to %x", bts)
// read-lock the state; release when done searching
ns.RLock()
// linear search for the next hop
found := false
var nxtneigh directory.Neighbor
for _, val := range ns.fulNeighs {
if subtle.ConstantTimeCompare(val.PubKey, bts) == 1 {
nxtneigh = val
found = found || true
// don't break, precaution against side channels
} else {
found = found || false
}
}
ns.RUnlock()
if !found {
response := textprot.TextReq{
Verb: "NOPE",
}
err = response.WriteTo(sok)
kilog.Debug("core2core: NEIGH_CONNECT to %x failed due to not found", bts)
return
}
// easydial to the next hop
hostport := fmt.Sprintf("%v:%v", nxtneigh.Address, nxtneigh.Port)
nxtsok, err := kiricom.EasyDial(hostport, nil, nxtneigh.Secret)
if err != nil {
return
}
defer nxtsok.Close()
// reply OKAY
response := textprot.TextReq{
Verb: "OKAY",
}
err = response.WriteTo(sok)
if err != nil {
return
}
kilog.Debug("core2core: NEIGH_CONNECT success to %x", bts)
// begin tunneling
go func() {
defer nxtsok.Close()
defer sok.Close()
io.Copy(nxtsok, sok)
}()
defer sok.Close()
io.Copy(sok, nxtsok)
return nil
}
