tls_content_read
ssret = tls_content_read(s->s3->rcontent, buf, len);
ssret = tls_content_read(s->s3->rcontent, buf, len);
return tls_content_read(s->s3->rcontent, buf, n);
return tls_content_read(rl->rcontent, buf, n);
ssize_t tls_content_read(struct tls_content *content, uint8_t *buf, size_t n);