PROTOCOL CHANGE! activate 32 bit nodenums/packetids

docs/software/crypto.md

@@ -34,7 +34,4 @@ Note that for both stategies, sizes are measured in blocks and that an AES block
 
 ## Remaining todo
 
-- Make the packet numbers 32 bit
-- Confirm the packet #s are stored in flash across deep sleep (and otherwise in in RAM)
 - Have the app change the crypto key when the user generates a new channel
-- Implement for NRF52 [NRF52](https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.0.0/lib_crypto_aes.html#sub_aes_ctr)

docs/software/nrf52-TODO.md

@@ -40,7 +40,6 @@ Needed to be fully functional at least at the same level of the ESP32 boards. At
 
 ## Items to be 'feature complete'
 
-- change packet numbers to be 32 bits
 - check datasheet about sx1262 temperature compensation
 - enable brownout detection and watchdog
 - stop polling for GPS characters, instead stay blocked on read in a thread
@@ -128,6 +127,7 @@ Nice ideas worth considering someday...
 - scheduleOSCallback doesn't work yet - it is way too fast (causes rapid polling of busyTx, high power draw etc...)
 - find out why we reboot while debugging - it was bluetooth/softdevice
 - make a file system implementation (preferably one that can see the files the bootloader also sees) - preferably https://github.com/adafruit/Adafruit_nRF52_Arduino/blob/master/libraries/InternalFileSytem/examples/Internal_ReadWrite/Internal_ReadWrite.ino else use https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/lib_fds_usage.html?cp=7_5_0_3_55_3
+- change packet numbers to be 32 bits
 
 ```
 

proto

@@ -1 +1 @@
-Subproject commit 9d083d5d4ff4ef095135b18468004eaba77cb691
+Subproject commit 3ba76bbe4c98ee9c9e422d8dc10844cc9fb5272a

src/mesh/MeshService.cpp

@@ -86,12 +86,14 @@ void MeshService::sendOurOwner(NodeNum dest, bool wantReplies)
 const MeshPacket *MeshService::handleFromRadioUser(const MeshPacket *mp)
 {
     bool wasBroadcast = mp->to == NODENUM_BROADCAST;
-    bool isCollision = mp->from == myNodeInfo.my_node_num;
 
-    // we win if we have a lower macaddr
+    // Disable this collision testing if we use 32 bit nodenums
-    bool weWin = memcmp(&owner.macaddr, &mp->decoded.user.macaddr, sizeof(owner.macaddr)) < 0;
+    bool isCollision = (sizeof(NodeNum) == 1) && (mp->from == myNodeInfo.my_node_num);
 
     if (isCollision) {
+        // we win if we have a lower macaddr
+        bool weWin = memcmp(&owner.macaddr, &mp->decoded.user.macaddr, sizeof(owner.macaddr)) < 0;
+
         if (weWin) {
             DEBUG_MSG("NOTE! Received a nodenum collision and we are vetoing\n");
 

src/mesh/MeshTypes.h

@@ -6,8 +6,8 @@
 #include "mesh.pb.h"
 #include <Arduino.h>
 
-typedef uint8_t NodeNum;
+typedef uint32_t NodeNum;
-typedef uint8_t PacketId; // A packet sequence number
+typedef uint32_t PacketId; // A packet sequence number
 
 #define NODENUM_BROADCAST (sizeof(NodeNum) == 4 ? UINT32_MAX : UINT8_MAX)
 #define ERRNO_OK 0

src/mesh/Router.cpp

@@ -56,8 +56,11 @@ PacketId generatePacketId()
 
     if (!didInit) {
         didInit = true;
-        i = random(0, numPacketId +
+
-                          1); // pick a random initial sequence number at boot (to prevent repeated reboots always starting at 0)
+        // pick a random initial sequence number at boot (to prevent repeated reboots always starting at 0)
+        // Note: we mask the high order bit to ensure that we never pass a 'negative' number to random
+        i = random(numPacketId & 0x7fffffff);
+        DEBUG_MSG("Initial packet id %u, numPacketId %u\n", i, numPacketId);
     }
 
     i++;

src/mesh/mesh.pb.c

@@ -9,7 +9,7 @@
 PB_BIND(Position, Position, AUTO)
 
 
-PB_BIND(Data, Data, 2)
+PB_BIND(Data, Data, AUTO)
 
 
 PB_BIND(User, User, AUTO)

src/mesh/mesh.pb.h

@@ -47,7 +47,7 @@ typedef struct _ChannelSettings {
     char name[12];
 } ChannelSettings;
 
-typedef PB_BYTES_ARRAY_T(251) Data_payload_t;
+typedef PB_BYTES_ARRAY_T(240) Data_payload_t;
 typedef struct _Data {
     Data_Type typ;
     Data_payload_t payload;
@@ -586,20 +586,20 @@ extern const pb_msgdesc_t ManufacturingData_msg;
 
 /* Maximum encoded size of messages (where known) */
 #define Position_size                            39
-#define Data_size                                256
+#define Data_size                                245
 #define User_size                                72
 #define RouteDiscovery_size                      88
-#define SubPacket_size                           285
+#define SubPacket_size                           274
-#define MeshPacket_size                          324
+#define MeshPacket_size                          313
 #define ChannelSettings_size                     60
 #define RadioConfig_size                         157
 #define RadioConfig_UserPreferences_size         93
 #define NodeInfo_size                            132
 #define MyNodeInfo_size                          110
-#define DeviceState_size                         15463
+#define DeviceState_size                         15100
 #define DebugString_size                         258
-#define FromRadio_size                           333
+#define FromRadio_size                           322
-#define ToRadio_size                             327
+#define ToRadio_size                             316
 /* ManufacturingData_size depends on runtime parameters */
 
 #ifdef __cplusplus