// Route - Router that does default behavior
func (r *DefaultRouter) Route(node api.Node, message []byte) error {
// Stuff Everything will need just about every time...
//
var channelLen uint16 // beginning uint16 of message is channel name length
channelName := ""
channelLen = (uint16(message[0]) << 8) | uint16(message[1])
if len(message) < int(channelLen)+2+16+16 { // uint16 + nonce + hash //todo
return errors.New("Incorrect channel name length")
}
idx := 2 + channelLen //skip over the channel name
nonce := message[idx : idx+16]
if r.seenRecently(nonce) { // LOOP PREVENTION before handling or forwarding
return nil
}
cid, err := node.CID() // we need this for cloning
if err != nil {
return err
}
//
// When the channel tag is set...
if channelLen > 0 { // channel message
channelName = string(message[2 : 2+channelLen])
consumed := false
if r.CheckChannels {
chn, err := node.GetChannel(channelName)
if err == nil { // this is a channel key we know
pubkey := cid.Clone()
pubkey.FromB64(chn.Pubkey)
consumed, err = r.check(node, pubkey, channelName, idx, nonce, message)
if err != nil {
return err
}
}
}
if (!consumed && r.ForwardUnknownChannels) || (consumed && r.ForwardConsumedChannels) {
if err := r.forward(node, channelName, message); err != nil {
return err
}
}
} else { // private message (zero length channel)
// content key case (to be removed, deprecated)
consumed := false
if r.CheckContent {
consumed, err = r.check(node, cid, channelName, idx, nonce, message)
if err != nil {
return err
}
}
if (!consumed && r.ForwardUnknownContent) || (consumed && r.ForwardConsumedContent) {
if err := r.forward(node, channelName, message); err != nil {
return err
}
}
// profile keys case
consumed = false
if r.CheckProfiles {
profiles, err := node.GetProfiles()
if err != nil {
return err
}
for _, profile := range profiles {
if !profile.Enabled {
continue
}
pubkey := cid.Clone()
pubkey.FromB64(profile.Pubkey)
consumed, err = r.check(node, pubkey, channelName, idx, nonce, message)
if err != nil {
return err
}
if consumed {
break
}
}
}
if (!consumed && r.ForwardUnknownProfiles) || (consumed && r.ForwardConsumedProfiles) {
if err := r.forward(node, channelName, message); err != nil {
return err
}
}
}
return nil
}
