tls_trailer_len
record_len = tls_header_len(en) + len + padding + tls_trailer_len(en);
tls_header_len(en), len, padding, tls_trailer_len(en));
tls_trailer_len(en);
outbuf_cap = tls_header_len(en) + len + tls_trailer_len(en);
outbuf_cap = tls_header_len(en) + tls_trailer_len(en);
tls_trailer_len(en);
outbuf_cap = tls_header_len(en) + len + tls_trailer_len(en);
outbuf_cap = tls_header_len(en) + len + tls_trailer_len(en);
outbuf_cap = tls_header_len(en) + len + tls_trailer_len(en);
outbuf_cap = tls_header_len(en) + len + tls_trailer_len(en);
outbuf_cap = tls_header_len(en) + len + tls_trailer_len(en);
payload_len = len - (tls_header_len(en) + tls_trailer_len(en));