Fixed whisper messages

* Whisper protocol wasn't properly suppling envelope slices
* Message history wasn't properly propagated
* Added 'Messages' method, filtering any current envelope with the
  supplied filter.

envelope.go

@@ -1,11 +1,9 @@
 package whisper
 
 import (
-	"bytes"
 	"crypto/ecdsa"
 	"encoding/binary"
 	"fmt"
-	"io"
 	"time"
 
 	"github.com/ethereum/go-ethereum/crypto"
@@ -28,22 +26,6 @@ type Envelope struct {
 	hash Hash
 }
 
-func NewEnvelopeFromReader(reader io.Reader) (*Envelope, error) {
-	var envelope Envelope
-
-	buf := new(bytes.Buffer)
-	buf.ReadFrom(reader)
-
-	h := H(crypto.Sha3(buf.Bytes()))
-	if err := rlp.Decode(buf, &envelope); err != nil {
-		return nil, err
-	}
-
-	envelope.hash = h
-
-	return &envelope, nil
-}
-
 func (self *Envelope) Hash() Hash {
 	if self.hash == EmptyHash {
 		self.hash = H(crypto.Sha3(ethutil.Encode(self)))
@@ -126,3 +108,27 @@ func (self *Envelope) withoutNonce() interface{} {
 func (self *Envelope) RlpData() interface{} {
 	return []interface{}{self.Expiry, self.Ttl, ethutil.ByteSliceToInterface(self.Topics), self.Data, self.Nonce}
 }
+
+func (self *Envelope) DecodeRLP(s *rlp.Stream) error {
+	var extenv struct {
+		Expiry uint32
+		Ttl    uint32
+		Topics [][]byte
+		Data   []byte
+		Nonce  uint32
+	}
+	if err := s.Decode(&extenv); err != nil {
+		return err
+	}
+
+	self.Expiry = extenv.Expiry
+	self.Ttl = extenv.Ttl
+	self.Topics = extenv.Topics
+	self.Data = extenv.Data
+	self.Nonce = extenv.Nonce
+
+	// TODO We should use the stream directly here.
+	self.hash = H(crypto.Sha3(ethutil.Encode(self)))
+
+	return nil
+}

message.go

@@ -67,7 +67,11 @@ func (self *Message) Seal(pow time.Duration, opts Opts) (*Envelope, error) {
 		}
 	}
 
-	envelope := NewEnvelope(DefaultTtl, opts.Topics, self)
+	if opts.Ttl == 0 {
+		opts.Ttl = DefaultTtl
+	}
+
+	envelope := NewEnvelope(opts.Ttl, opts.Topics, self)
 	envelope.Seal(pow)
 
 	return envelope, nil

whisper.go

@@ -126,18 +126,20 @@ func (self *Whisper) Watch(opts Filter) int {
 	})
 }
 
-func (self *Whisper) Trigger(id int) {
+func (self *Whisper) Messages(id int) (messages []*Message) {
 	filter := self.filters.Get(id)
 	if filter != nil {
 		for _, e := range self.messages {
 			if msg, key := self.open(e); msg != nil {
 				f := createFilter(msg, e.Topics, key)
 				if self.filters.Match(filter, f) {
-					self.filters.Notify(f, msg)
+					messages = append(messages, msg)
 				}
 			}
 		}
 	}
+
+	return
 }
 
 // Main handler for passing whisper messages to whisper peer objects
@@ -158,18 +160,20 @@ func (self *Whisper) msgHandler(peer *p2p.Peer, ws p2p.MsgReadWriter) error {
 			return err
 		}
 
-		envelope, err := NewEnvelopeFromReader(msg.Payload)
-		if err != nil {
+		var envelopes []*Envelope
+		if err := msg.Decode(&envelopes); err != nil {
 			peer.Infoln(err)
 			continue
 		}
 
+		for _, envelope := range envelopes {
 			if err := self.add(envelope); err != nil {
 				// TODO Punish peer here. Invalid envelope.
 				peer.Infoln(err)
 			}
 			wpeer.addKnown(envelope)
 		}
+	}
 }
 
 // takes care of adding envelopes to the messages pool. At this moment no sanity checks are being performed.
@@ -192,6 +196,8 @@ func (self *Whisper) add(envelope *Envelope) error {
 		go self.postEvent(envelope)
 	}
 
+	wlogger.DebugDetailln("added whisper message")
+
 	return nil
 }