1 /*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)tuba_table.h 8.2 (Berkeley) 07/13/94 8 */ 9 10 struct tuba_cache { 11 struct radix_node tc_nodes[2]; /* convenient lookup */ 12 int tc_refcnt; 13 int tc_time; /* last looked up */ 14 int tc_flags; 15 #define TCF_PERM 1 16 int tc_index; 17 u_short tc_sum; /* cksum of nsap inc. length */ 18 u_short tc_ssum; /* swab(tc_sum) */ 19 struct sockaddr_iso tc_siso; /* for responding */ 20 struct iso_addr tc_addr; 21 }; 22 23 #define ADDCARRY(x) (x >= 65535 ? x -= 65535 : x) 24 #define REDUCE(a, b) { union { u_short s[2]; long l;} l_util; long x; \ 25 l_util.l = (b); x = l_util.s[0] + l_util.s[1]; ADDCARRY(x); \ 26 if (x == 0) x = 0xffff; a = x;} 27 #define SWAB(a, b) { union { u_char c[2]; u_short s;} s; u_char t; \ 28 s.s = (b); t = s.c[0]; s.c[0] = s.c[1]; s.c[1] = t; a = s.s;} 29 30 #ifdef KERNEL 31 extern int tuba_table_size; 32 extern struct tuba_cache **tuba_table; 33 extern struct radix_node_head *tuba_tree; 34 #endif 35