Espressif ESP32-S2 Programming Manual page 560

Chapter 2. API Reference
state string
Description:
get the state string
Example:
void example(void)
{
SSL *ssl;
const char *str;
... ...
str = SSL_state_string(ssl);
}
3.33 char* SSL_state_string_long (const SSL * ssl)
Arguments:
ssl - SSL point
Return:
state long string
Description:
get the state long string
Example:
void example(void)
{
SSL *ssl;
char *str;
... ...
str = SSL_state_string(ssl);
}
3.34 int SSL_get_error (const SSL * ssl, int ret_code)
Arguments:
ssl - SSL point
ret_code - SSL return code
Return:
SSL error number
Description:
get SSL error code
Example:
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