bsd/netat/ddp.c

251  *	checksum = ddp_checksum(mp, offset)
254  *	mp		pointer to the datagram gbuf_t
262 u_short ddp_checksum(mp, offset)
263      register gbuf_t	*mp;
273 		if (offset >= gbuf_len(mp))
274 			offset -= gbuf_len(mp);
276 			data = ((unsigned char *) gbuf_rptr(mp)) + offset;
277 			length = gbuf_len(mp) - offset;
286 	} while ( (mp = gbuf_cont(mp)) );
519  *	The mbuf chain pointed to by *mp is consumed on success, and
523 int ddp_output(mp, src_socket, src_addr_included)
524      register gbuf_t	**mp;
547 	m = *mp;
554 		gbuf_freel(*mp);
565 		gbuf_freel(*mp);
568 	if ((len = gbuf_msgsize(*mp)) > DDP_DATAGRAM_SIZE) {
574 		gbuf_freel(*mp);
633 		fillin_pkt_chain(*mp);
639 		for (mdata = *mp; mdata; mdata = mdata_next) {
647 	    (zip_type_packet(*mp) == ZIP_GETMYZONE)) {
649 	        error = zip_handle_getmyzone(ifID, *mp);
650 		gbuf_freel(*mp);
714 					gbuf_freel(*mp);
730 			routing_needed(*mp, ifID, TRUE);
739 		gbuf_freel(*mp);
785 	fillin_pkt_chain(*mp);
793 	m = *mp;
874 void ddp_input(mp, ifID)
875      register gbuf_t   *mp;
885 		     ifID, mp, gbuf_len(mp),0);
897 		gbuf_freem(mp);
909 	if ((mp = (gbuf_t *)ddp_compress_msg(mp)) == NULL) {
916 	msgsize = gbuf_msgsize(mp);
936 		gbuf_freem(mp);
943 	ddp = (at_ddp_t *)gbuf_rptr(mp);
954 				gbuf_freem(mp);
960 		        mp = ddp_adjmsg(mp, -(msgsize - len)) ? mp : 0;
961 		        if (mp == 0)
969 			gbuf_freem(mp);
986 		gbuf_freem(mp);
993            (UAS_VALUE_NTOH(ddp->checksum) != ddp_checksum(mp, 4))) {
996 			ddp_checksum(mp, 4), UAS_VALUE_NTOH(ddp->checksum)));
999 		gbuf_freem(mp);
1022 		(*ddp_handler[socket].func)(mp, ifID);
1044 			atp_input(mp);
1050 			adsp_input(mp);
1074 					mp = m_pullup((struct mbuf *)mp,
1076 					if (mp) {
1077 						gbuf_rinc(mp, DDP_X_HDR_SIZE);
1088 						 mp, 0, NULL) != 0) {
1092 				atalk_putnext(gref, mp);
1098 		gbuf_freem(mp);
1110 			gbuf_freem(mp);
1113 			routing_needed(mp, ifID, FALSE);
1134 int ddp_router_output(mp, ifID, addr_type, router_net, router_node, enet_addr)
1135      gbuf_t	*mp;
1150 		gbuf_freel(mp);
1153 	ddp = (at_ddp_t *)gbuf_rptr(mp);
1158 			fillin_pkt_chain(mp);
1161 			ddp_AURPsendx(AURPCODE_DATAPKT, mp, router_node);
1164 			gbuf_freel(mp);
1172 	if (gbuf_msgsize(mp) > DDP_DATAGRAM_SIZE) {
1176 			 gbuf_msgsize(mp)));
1177 		gbuf_freel(mp);
1196 			ddp_input(mp, ifID);
1221 	      gbuf_freel(mp);
1225 	fillin_pkt_chain(mp);
1232 	    m = mp;