From 9fb51e0655b067aa9ca4e7bcbb1bcfda304fbadc Mon Sep 17 00:00:00 2001
From: Jonathan Hudson <jh+github@daria.co.uk>
Date: Wed, 13 Nov 2024 18:22:57 +0000
Subject: [PATCH] [mspv2] pass "flags" field back to sender, define ILMI flag
 (#10464)

---
 src/main/fc/fc_msp.c | 12 ++++++------
 src/main/msp/msp.h   |  1 +
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/src/main/fc/fc_msp.c b/src/main/fc/fc_msp.c
index 57b68f02402..f490d28128a 100644
--- a/src/main/fc/fc_msp.c
+++ b/src/main/fc/fc_msp.c
@@ -2717,7 +2717,7 @@ static mspResult_e mspFcProcessInCommand(uint16_t cmdMSP, sbuf_t *src)
                             vtxSettingsConfigMutable()->lowPowerDisarm = sbufReadU8(src);
                         }
 
-                        // API version 1.42 - extension for pitmode frequency 
+                        // API version 1.42 - extension for pitmode frequency
                         if (sbufBytesRemaining(src) >= 2) {
                             sbufReadU16(src); //skip pitModeFreq
                         }
@@ -2738,15 +2738,15 @@ static mspResult_e mspFcProcessInCommand(uint16_t cmdMSP, sbuf_t *src)
                         if (sbufBytesRemaining(src) >= 2) {
                             sbufReadU16(src); // freq
                         }
-                        
+
                         if (sbufBytesRemaining(src) >= 3) {
                             sbufReadU8(src); // band count
                             sbufReadU8(src); // channel count
-                            
+
                             uint8_t newPowerCount = sbufReadU8(src);
                             if (newPowerCount > 0 && newPowerCount < (vtxDevice->capability.powerCount)) {
                                 vtxDevice->capability.powerCount = newPowerCount;
-                            }                        
+                            }
                         }
                     }
                 }
@@ -2944,7 +2944,7 @@ static mspResult_e mspFcProcessInCommand(uint16_t cmdMSP, sbuf_t *src)
                 if (sublinkID == 0) {
                     rxLinkStatistics.uplinkTXPower = sbufReadU16(src);
                     rxLinkStatistics.downlinkTXPower = sbufReadU16(src);
-                    
+
                     for (int i = 0; i < 4; i++) {
                         rxLinkStatistics.band[i] = sbufReadU8(src);
                     }
@@ -4249,7 +4249,7 @@ mspResult_e mspFcProcessCommand(mspPacket_t *cmd, mspPacket_t *reply, mspPostPro
     if (cmd->flags & MSP_FLAG_DONT_REPLY) {
         ret = MSP_RESULT_NO_REPLY;
     }
-
+    reply->flags = cmd->flags;
     reply->result = ret;
     return ret;
 }
diff --git a/src/main/msp/msp.h b/src/main/msp/msp.h
index 0c00b81ece7..e988ea2eddf 100644
--- a/src/main/msp/msp.h
+++ b/src/main/msp/msp.h
@@ -46,6 +46,7 @@ typedef struct mspPacket_s {
 
 typedef enum {
     MSP_FLAG_DONT_REPLY           = (1 << 0),
+    MSP_FLAG_ILMI                 = (1 << 1), // "In-Line Message identifier"
 } mspFlags_e;
 
 struct serialPort_s;