more mqtt design work

docs/software/mqtt.md

@@ -84,9 +84,9 @@ FIXME, possibly don't global mirror text messages - instead rely on matrix/riot?
 
 #### Service Envelope
 
-The payload published on mesh/... will always be wrapped in a ServiceEnvelope protobuf.
+The payload published on mesh/... will always be wrapped in a [ServiceEnvelope protobuf](https://github.com/meshtastic/Meshtastic-protobufs/blob/master/docs/docs.md#.ServiceEnvelope).
 
-FIXME, the payload published on the topic, will include the message, and full information about arrival time, who forwarded it, source channel, source mesh id, etc... 
+ServiceEnvelope will include the message, and full information about arrival time, who forwarded it, source channel, source mesh id, etc... 
 
 #### NODEID
 
@@ -174,6 +174,9 @@ on how this will be implemented and guesses at approximate work items.
 - DONE Refactor the position features into a position "mini-app". Use only the new public on-device API to implement this app.
 - DONE Refactor the on device texting features into a messaging "mini-app". (Similar to the position mini-app)
 - Add new multi channel concept
+- Add portion of channelid to the raw lora packet header
+- Confirm that we can now forward encrypted packets without decrypting at each node
+- Use a channel named "remotehw" to secure the GPIO service.  If that channel is not found, don't even start the service.  Document this as the standard method for securing services.
 - Add first cut of the "gateway node" code (i.e. MQTT broker client) to the python API (very little code needed for this component)
 - Confirm that texting works to/from the internet
 - Confirm that positions are optionally sent to the internet

proto

@@ -1 +1 @@
-Subproject commit 5a23071d2363725ca954562f00bfca0d5717ca79
+Subproject commit a66504ed6404ed967799e8b4441e4a2adbe62660

src/mesh/apponly.pb.c

@@ -0,0 +1,12 @@
+/* Automatically generated nanopb constant definitions */
+/* Generated by nanopb-0.4.4 */
+
+#include "apponly.pb.h"
+#if PB_PROTO_HEADER_VERSION != 40
+#error Regenerate this file with the current version of nanopb generator.
+#endif
+
+PB_BIND(ServiceEnvelope, ServiceEnvelope, 2)
+
+
+

src/mesh/apponly.pb.h

@@ -0,0 +1,56 @@
+/* Automatically generated nanopb header */
+/* Generated by nanopb-0.4.4 */
+
+#ifndef PB_APPONLY_PB_H_INCLUDED
+#define PB_APPONLY_PB_H_INCLUDED
+#include <pb.h>
+#include "mesh.pb.h"
+
+#if PB_PROTO_HEADER_VERSION != 40
+#error Regenerate this file with the current version of nanopb generator.
+#endif
+
+/* Struct definitions */
+typedef struct _ServiceEnvelope {
+    bool has_packet;
+    MeshPacket packet;
+    pb_callback_t channel_id;
+    pb_callback_t mesh_id;
+} ServiceEnvelope;
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Initializer values for message structs */
+#define ServiceEnvelope_init_default             {false, MeshPacket_init_default, {{NULL}, NULL}, {{NULL}, NULL}}
+#define ServiceEnvelope_init_zero                {false, MeshPacket_init_zero, {{NULL}, NULL}, {{NULL}, NULL}}
+
+/* Field tags (for use in manual encoding/decoding) */
+#define ServiceEnvelope_packet_tag               1
+#define ServiceEnvelope_channel_id_tag           2
+#define ServiceEnvelope_mesh_id_tag              3
+
+/* Struct field encoding specification for nanopb */
+#define ServiceEnvelope_FIELDLIST(X, a) \
+X(a, STATIC,   OPTIONAL, MESSAGE,  packet,            1) \
+X(a, CALLBACK, SINGULAR, STRING,   channel_id,        2) \
+X(a, CALLBACK, SINGULAR, STRING,   mesh_id,           3)
+#define ServiceEnvelope_CALLBACK pb_default_field_callback
+#define ServiceEnvelope_DEFAULT NULL
+#define ServiceEnvelope_packet_MSGTYPE MeshPacket
+
+extern const pb_msgdesc_t ServiceEnvelope_msg;
+
+/* Defines for backwards compatibility with code written before nanopb-0.4.0 */
+#define ServiceEnvelope_fields &ServiceEnvelope_msg
+
+/* Maximum encoded size of messages (where known) */
+/* ServiceEnvelope_size depends on runtime parameters */
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif