[WIP] Fix SSL client compilation error in SSLClientESP32

[Copilot]

Cloud agent has begun work on Error in SSLClientESP32 due to missing member and will update this pull request as work progresses.

Original prompt

Archiving .pio\build\esp32dev\lib4b5\libPubSubClient.a
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-matrix.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-misc.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-psram.c.o
.pio/libdeps/esp32dev/SSLClientESP32/src/ssl_lib_client.cpp: In function 'void SSLClientLib::ssl_init(SSLClientLib::sslclient_context*, Client*)':
.pio/libdeps/esp32dev/SSLClientESP32/src/ssl_lib_client.cpp:148:62: error: 'mbedtls_ssl_context' {aka 'struct mbedtls_ssl_context'} has no member named 'private_p'
if (ssl_client->context_allocated && ssl_client->ssl_ctx.private_p != NULL) {
^~~~~~~~~
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-rgb-led.c.o
Compiling .pio\build\esp32dev\FrameworkArduino\esp32-hal-rmt.c.o
*** [.pio\build\esp32dev\lib449\SSLClientESP32\ssl_lib_client.cpp.o] Error 1
=================================== [FAILED] Took 8.88 seconds =====

User has selected text in file TinyGSM-fork/src/TinyGsmModem.tpp from 61:24 to 61:31

[Chronological Review: The conversation began with the user outlining a series of modifications to the SSLClientESP32 library to implement a persistent SSL context to avoid memory fragmentation. The user provided detailed steps for modifying various files, including ssl_lib_client.h, ssl_lib_client.cpp, and SSLClientESP32.cpp. After implementing these changes, the user encountered several errors related to MQTT connections and memory management, leading to multiple iterations of debugging and adjustments to the code. The user reported specific error messages and stack traces indicating issues with memory allocation and SSL certificate parsing. The conversation culminated in the user receiving a compilation error related to a missing member in the mbedtls_ssl_context structure.]

[Intent Mapping: The user explicitly requested modifications to the SSLClientESP32 library to ensure persistent memory allocation for SSL contexts. They aimed to eliminate memory fragmentation issues that caused crashes during prolonged operation. The user also sought assistance in debugging errors encountered after implementing the changes.]

[Technical Inventory:

• Library: SSLClientESP32
• Key Files:
  • ssl_lib_client.h: Modified to include a context_allocated flag.
  • ssl_lib_client.cpp: Adjusted functions for SSL initialization and connection management.
  • SSLClientESP32.cpp: Updated destructor to prevent memory leaks.
• Error Handling: The user encountered errors related to CTR_DRBG and LoadProhibited exceptions, indicating issues with random number generation and SSL certificate parsing.]

[Code Archaeology:

• File: ssl_lib_client.h: Added bool context_allocated; to track memory allocation.
• File: ssl_lib_client.cpp:
  • Modified ssl_init to prevent reallocation.
  • Adjusted start_ssl_client to check if the DRBG context was already seeded.
  • Updated stop_ssl_socket to reset SSL session without freeing memory.
• File: SSLClientESP32.cpp: Updated destructor to avoid deleting the SSL context.]

[Progress Assessment:

• Completed Tasks: User successfully modified the library to implement persistent SSL context.
• Partially Complete Work: User is currently debugging errors related to MQTT connections and SSL certificate parsing.]

[Context Validation: All critical information regarding the user's modifications, encountered errors, and debugging efforts is captured for continuation.]

[Recent Commands Analysis:

• Last Agent Commands: The user executed a compilation command for the SSLClientESP32 library.
• Tool Results Summary: The compilation failed with an error indicating that mbedtls_ssl_context has no member named private_p, which was referenced in the modified ssl_lib_client.cpp file.
• Pre-Summary State: The agent was actively working on resolving compilation errors after implementing changes to the SSLClientESP32 library.
• Operation Context: The recent commands were executed to compile the modified library, which is essential for achieving the user's goal of a stable MQTT connection without memory fragmentation issues.]

1. Conversation Overview: - Primary Objectives: The user aimed to modify the SSLClientESP32 library to implement a persistent SSL context to avoid memory fragmentation, stating, "We will modify the library to Allocate Once, Reuse Forever." - Session Context: The conversation involved detailed steps for modifying the library, followed by debugging efforts after encountering errors related to MQTT connections and SSL certificate parsing. - User Intent Evolution: The user's focus shifted from implementing changes to troubleshooting errors that arose post-implementation.

2. Technical Foundation:

• Library: SSLClientESP32
• Key Modifications:
  • Added context_allocated flag in ssl_lib_client.h.
    ...

Created from VS Code via the GitHub Pull Request extension.

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.