Quectel Delta Radio Firmware Upgrade support - libmts-io implementation

Added more strict handling for comma-separated data in URC messages to prevent out-of-bounds reads.

1 files changed, 10 insertions, 0 deletions

diff --git a/include/mts/MTS_IO_QuectelRadio.h b/include/mts/MTS_IO_QuectelRadio.h
index 41c89dc..58e3d25 100644
--- a/include/mts/MTS_IO_QuectelRadio.h
+++ b/include/mts/MTS_IO_QuectelRadio.h
@@ -82,8 +82,18 @@ namespace MTS {
                 static uint16_t getQuectelChecksum(const void* data, size_t nBytes);
                 static inline void updateQuectelChecksum(uint16_t& iChecksum, uint16_t iNewFragment);
                 static inline uint16_t bytesToUint16(uint8_t high, uint8_t low);
+
                 CODE fumoWaitUpgradeFinished(UpdateCb& stepCb);
                 CODE fumoWaitNewFirmware(UpdateCb& stepCb);
+
+                /// Get value from container by its index, use default value if not found. Non-template version.
+                const std::string& getByIndex(const std::vector<std::string>& vector, size_t index, const std::string& defaultValue) {
+                    if (index >= vector.size()) {
+                        return defaultValue;
+                    } else {
+                        return vector[index];
+                    }
+                }
         };
     }
 }