Allow passing IP as connect method parameter in WiFiClientSecure and skip unnecessary host-ip conversions (#7643)

* Fix hostByName to avoid asking DNS when valid IP is passed via hostname param
* Fix hanging in send_ssl_data

Make the warning actionable by pointing at the right setting in Kconfig.

Fixed issue with ssl_client->socket being closed without being consistently set to -1.  Changed close to lwip_close to be consistent with lwip_socket, resolved issue with long term assert after 4+ days (assert failed: lock_release_generic locks.c:186).
Co-authored-by: NMe No Dev <me-no-dev@users.noreply.github.com>

Summary

Added compiler.warning_flags to all chips in platform.txt to reflect users setting of warning level output during compilation (set up in Arduino IDE preferences)

Impact

When a warning is set to none the compilation will no longer display warnings

Related links

Solves issue #6118

* Uniform timeout WiFiClient-WiFiClientSecure

* Added missing prototype

* Add socket check on setTimeout

Private Key. Issue presented during any subsequent invocation of loadCACert, loadCertificate, and
loadPrivateKey, respectively, after the first invocation.

Co-authored-by: NJason2866 <24528715+Jason2866@users.noreply.github.com>
Co-authored-by: NUnexpected Maker <seon@unexpectedmaker.com>
Co-authored-by: NRodrigo Garcia <rodrigo.garcia@espressif.com>
Co-authored-by: NTomáš Pilný <34927466+PilnyTomas@users.noreply.github.com>
Co-authored-by: NPedro Minatel <pedro.minatel@espressif.com>
Co-authored-by: NIvan Grokhotkov <ivan@espressif.com>
Co-authored-by: NJan Procházka <90197375+P-R-O-C-H-Y@users.noreply.github.com>
Co-authored-by: NLimor "Ladyada" Fried <limor@ladyada.net>

* Add certificate bundle capability to WiFiClientSecure

Enable usage of the ESP32 IDF's certificate bundle for WiFiClientSecure connections.

Adds the ability to load a bundle or root certificates and use them for authenticating SSL servers.

Based on work from Onno-Dirkzwager, Duckle29, kubo6472, meltdown03, kinafu and others.

See also:
- https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/protocols/esp_crt_bundle.html
- https://github.com/espressif/arduino-esp32/issues/3646
- libraries/WiFiClientSecure/README.md

* Fix build issues

* Clean up old bundle index when NULL bundle is attached

This adds a function to WiFiClientSecure to set the ALPN protocol.

This is required for an MQTT client to connect to AWS IoT when using an AWS Custom Authorizer, as described here.

Example code snippet:

...
WiFiClientSecure wiFiClient;

// ALPN protocol, needed with AWS custom authorizer
const char *aws_protos[] = {"mqtt", NULL};

void setup() {
  wiFiClient.setCACert(AWSCAPEM);
  wiFiClient.setAlpnProtocols(aws_protos);
}
...

Add the ability to get the peer certificate of an SSL connection; useful for IoT when the root/cert trust chain has a shorter lifecylce than the device itself. Includes example

Closes #5398

Using the same non-blocking socket connect pattern for respecting connection timeout, copied from WiFiClient::connect.

WiFiClient::connect uses lwip_connect_r, whereas start_ssl_client uses lwip_connect. I haven't found what is the difference between them. I tested both, both work ok, so I kept lwip_connect.

Fixes: https://github.com/espressif/arduino-esp32/issues/4960

This reverts commit 4b3f5c8e.

mbedTLS requires repeated calls to mbedtls_ssl_write() whenever it returns MBEDTLS_ERR_SSL_WANT_READ or MBEDTLS_ERR_SSL_WANT_WRITE. this happens when the client sends data faster then the server or the connection can handle.

The temp buffer serves no purpose here. Also mbedtls_strerror can be called with size == 0 safely.

Replace (depricated) bzero with memset.

Fixes: #3460

This code has been run in production for 1 month and it looks stable, no data dropped and it definitely fixes the issue described. I think that this can be merged to avoid using custom package referencing in PlatformIO that has been used in quite a few projects for now.
Co-authored-by: NIvan Golubic <ivan@mvt-solutions.com>

* Add an aditional (void *) arg to the RMT callback - to allow more flexible handling of the callback (e.g. by passing a private struct or a class pointer). Same pattern as used by the Ticker() and many others. Example updated & new example with a trapoline added.

* Fix example for new API

* Fix lint warnings

* Add a second missed example.

* Correct timeout & improve socket error handling.

I met problem while I was working with the WiFiClientSecure.
I tried to found the source of the problem, and I found it in the sll_client.cpp.
Please check my contribution.

I've open this problem in #4335 but received no response.

Co-authored-by: NMark Hale <mark.hale@physics.org>

Especially if the user wants to use the library as component in IDF,
there are some pitfalls while doing make menuconfig. One is this missing
dependency which will now fail with a better error message with a hint to
the user how to fix it.

refs #2154 #3215

* Shows only free internal heap on logs

Since Mbedtls is running only on internal heap, show internal + PSRAM available memory on logs can confuse the users

* Clarify logs

closes: https://github.com/espressif/arduino-esp32/pull/2151

* WiFiClientSecure: add support for PSK (pre-shared key) ciphers

* add example for WiFiClientSecure PSK

* WiFiClientSecure: added README

* Clean warnings when all warning enabled

Not used variables / functions due to debug log

Dual define with different values :
cores\esp32/binary.h
#define B110 6
#define B1000000 64

tools/sdk/include/newlib/sys/termios.h
#define B110        3
#define B1000000   23

Local variable returned in WiFiclient Secure

* change due to deprecated function

* Update with proper variable and label

* Update esp32-hal-i2c.c

* Apply changes requested

* Fix warnings due to #define conflict thanks @atanisoft