+
+/************************** Packet Stream Wrapper ***************************/
+
+/* Packet stream wrapper receive callback */
+static SilcBool
+silc_packet_wrap_packet_receive(SilcPacketEngine engine,
+ SilcPacketStream stream,
+ SilcPacket packet,
+ void *callback_context,
+ void *stream_context);
+
+const SilcStreamOps silc_packet_stream_ops;
+
+/* Packet stream wrapper context */
+typedef struct {
+ const SilcStreamOps *ops;
+ SilcPacketStream stream;
+ SilcStreamNotifier callback;
+ void *context;
+ SilcList in_queue;
+ SilcPacketType type;
+ SilcPacketFlags flags;
+ unsigned int closed : 1;
+} *SilcPacketWrapperStream;
+
+/* Packet wrapper callbacks */
+static SilcPacketCallbacks silc_packet_wrap_cbs =
+{
+ silc_packet_wrap_packet_receive, NULL, NULL
+};
+
+/* Packet stream wrapper receive callback */
+
+static SilcBool
+silc_packet_wrap_packet_receive(SilcPacketEngine engine,
+ SilcPacketStream stream,
+ SilcPacket packet,
+ void *callback_context,
+ void *stream_context)
+{
+ SilcPacketWrapperStream pws = callback_context;
+
+ if (!pws->closed || !pws->callback)
+ return FALSE;
+
+ silc_list_add(pws->in_queue, packet);
+
+ /* Call notifier callback */
+ pws->callback((SilcStream)pws, SILC_STREAM_CAN_READ, pws->context);
+
+ return TRUE;
+}
+
+/* Read SILC packet */
+
+int silc_packet_wrap_read(SilcStream stream, unsigned char *buf,
+ SilcUInt32 buf_len)
+{
+ SilcPacketWrapperStream pws = stream;
+ SilcPacket packet;
+ int len;
+
+ if (pws->ops != &silc_packet_stream_ops)
+ return -2;
+ if (!silc_list_count(pws->in_queue))
+ return -1;
+ if (pws->closed)
+ return -2;
+
+ silc_list_start(pws->in_queue);
+ packet = silc_list_get(pws->in_queue);
+ silc_list_del(pws->in_queue, packet);
+
+ len = silc_buffer_len(&packet->buffer);
+ if (len > buf_len)
+ len = buf_len;
+
+ memcpy(buf, packet->buffer.data, len);
+
+ silc_packet_free(packet);
+ return len;
+}
+
+/* Write SILC packet */
+
+int silc_packet_wrap_write(SilcStream stream, const unsigned char *data,
+ SilcUInt32 data_len)
+{
+ SilcPacketWrapperStream pws = stream;
+
+ if (pws->ops != &silc_packet_stream_ops)
+ return -2;
+
+ /* Send the SILC packet */
+ if (!silc_packet_send(pws->stream, pws->type, pws->flags, data, data_len))
+ return -2;
+
+ return data_len;
+}
+
+/* Close stream */
+
+SilcBool silc_packet_wrap_close(SilcStream stream)
+{
+ SilcPacketWrapperStream pws = stream;
+
+ if (pws->ops != &silc_packet_stream_ops)
+ return FALSE;
+ if (pws->closed)
+ return TRUE;
+
+ /* Unlink */
+ if (pws->callback)
+ silc_packet_stream_unlink(pws->stream, &silc_packet_wrap_cbs, pws);
+ pws->closed = TRUE;
+
+ return TRUE;
+}
+
+/* Destroy wrapper stream */
+
+void silc_packet_wrap_destroy(SilcStream stream)
+
+{
+ SilcPacketWrapperStream pws = stream;
+ SilcPacket packet;
+
+ if (pws->ops != &silc_packet_stream_ops)
+ return;
+
+ SILC_LOG_DEBUG(("Destroying wrapped packet stream %p", pws));
+
+ silc_stream_close(stream);
+ silc_list_start(pws->in_queue);
+ while ((packet = silc_list_get(pws->in_queue)))
+ silc_packet_free(packet);
+ silc_packet_stream_unref(pws->stream);
+
+ silc_free(pws);
+}
+
+/* Link stream to receive packets */
+
+void silc_packet_wrap_notifier(SilcStream stream,
+ SilcSchedule schedule,
+ SilcStreamNotifier callback,
+ void *context)
+{
+ SilcPacketWrapperStream pws = stream;
+
+ if (pws->ops != &silc_packet_stream_ops)
+ return;
+ if (pws->closed)
+ return;
+
+ /* Link to receive packets */
+ if (callback)
+ silc_packet_stream_link(pws->stream, &silc_packet_wrap_cbs, pws,
+ 100000, pws->type, -1);
+ else
+ silc_packet_stream_unlink(pws->stream, &silc_packet_wrap_cbs, pws);
+
+ pws->callback = callback;
+ pws->context = context;
+}
+
+/* Return schedule */
+
+SilcSchedule silc_packet_wrap_get_schedule(SilcStream stream)
+{
+ return NULL;
+}
+
+/* Wraps packet stream into SilcStream. */
+
+SilcStream silc_packet_stream_wrap(SilcPacketStream stream,
+ SilcPacketType type,
+ SilcPacketFlags flags)
+{
+ SilcPacketWrapperStream pws;
+
+ pws = silc_calloc(1, sizeof(*pws));
+ if (!pws)
+ return NULL;
+
+ SILC_LOG_DEBUG(("Wrapping packet stream %p to stream %p", stream, pws));
+
+ pws->ops = &silc_packet_stream_ops;
+ pws->stream = stream;
+ pws->type = type;
+ pws->flags = flags;
+
+ silc_list_init(pws->in_queue, struct SilcPacketStruct, next);
+ silc_packet_stream_ref(stream);
+
+ return (SilcStream)pws;
+}
+
+const SilcStreamOps silc_packet_stream_ops =
+{
+ silc_packet_wrap_read,
+ silc_packet_wrap_write,
+ silc_packet_wrap_close,
+ silc_packet_wrap_destroy,
+ silc_packet_wrap_notifier,
+ silc_packet_wrap_get_schedule,
+};