This code started off as a copy of ssl3_write_bytes(), and the comment
was not updated with the implementation.
Reported by yangyangtiantianlonglong in #13518
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/13566)
wb = &s->rlayer.wbuf[0];
/*
- * first check if there is a SSL3_BUFFER still being written out. This
- * will happen with non blocking IO
+ * DTLS writes whole datagrams, so there can't be anything left in
+ * the buffer.
*/
if (!ossl_assert(SSL3_BUFFER_get_left(wb) == 0)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);