Espressif ESP32-S2 Programming Manual page 562

Chapter 2. API Reference
3.37 int SSL_want_read (const SSL * ssl)
Arguments:
ssl - SSL point
Return:
0 : false
1 : true
Description:
check if SSL want to read
Example:
void example(void)
{
SSL *ssl;
int ret;
... ...
ret = SSL_want_read(ssl);
}
3.38 int SSL_want_write (const SSL * ssl)
Arguments:
ssl - SSL point
Return:
0 : false
1 : true
Description:
check if SSL want to write
Example:
void example(void)
{
SSL *ssl;
int ret;
... ...
ret = SSL_want_write(ssl);
}
Chapter 4. SSL X509 Certification and Private Key Function
4.1 X509 * d2i_X509 (X509 ** cert, const unsigned char * buffer, long len)
Arguments:
Espressif Systems 551
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