+int dtls_prepare_record_header(OSSL_RECORD_LAYER *rl,
+ WPACKET *thispkt,
+ OSSL_RECORD_TEMPLATE *templ,
+ unsigned int rectype,
+ unsigned char **recdata)
+{
+ size_t maxcomplen;
+
+ *recdata = NULL;
+
+ maxcomplen = templ->buflen;
+ if (rl->compctx != NULL)
+ maxcomplen += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
+
+ if (!WPACKET_put_bytes_u8(thispkt, rectype)
+ || !WPACKET_put_bytes_u16(thispkt, templ->version)
+ || !WPACKET_put_bytes_u16(thispkt, rl->epoch)
+ || !WPACKET_memcpy(thispkt, &(rl->sequence[2]), 6)
+ || !WPACKET_start_sub_packet_u16(thispkt)
+ || (rl->eivlen > 0
+ && !WPACKET_allocate_bytes(thispkt, rl->eivlen, NULL))
+ || (maxcomplen > 0
+ && !WPACKET_reserve_bytes(thispkt, maxcomplen,
+ recdata))) {
+ RLAYERfatal(rl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
+ return 0;
+ }
+
+ return 1;
+}
+