1 /* 2 * net/tipc/addr.h: Include file for TIPC address utility routines 3 * 4 * Copyright (c) 2000-2006, Ericsson AB 5 * Copyright (c) 2004-2005, Wind River Systems 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the names of the copyright holders nor the names of its 17 * contributors may be used to endorse or promote products derived from 18 * this software without specific prior written permission. 19 * 20 * Alternatively, this software may be distributed under the terms of the 21 * GNU General Public License ("GPL") version 2 as published by the Free 22 * Software Foundation. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 #ifndef _TIPC_ADDR_H 38 #define _TIPC_ADDR_H 39 40 static inline u32 own_node(void) 41 { 42 return tipc_node(tipc_own_addr); 43 } 44 45 static inline u32 own_cluster(void) 46 { 47 return tipc_cluster(tipc_own_addr); 48 } 49 50 static inline u32 own_zone(void) 51 { 52 return tipc_zone(tipc_own_addr); 53 } 54 55 static inline int in_own_cluster(u32 addr) 56 { 57 return !((addr ^ tipc_own_addr) >> 12); 58 } 59 60 static inline int is_slave(u32 addr) 61 { 62 return addr & 0x800; 63 } 64 65 static inline int may_route(u32 addr) 66 { 67 return(addr ^ tipc_own_addr) >> 11; 68 } 69 70 static inline int in_scope(u32 domain, u32 addr) 71 { 72 if (!domain || (domain == addr)) 73 return 1; 74 if (domain == (addr & 0xfffff000u)) /* domain <Z.C.0> */ 75 return 1; 76 if (domain == (addr & 0xff000000u)) /* domain <Z.0.0> */ 77 return 1; 78 return 0; 79 } 80 81 /** 82 * addr_scope - convert message lookup domain to equivalent 2-bit scope value 83 */ 84 85 static inline int addr_scope(u32 domain) 86 { 87 if (likely(!domain)) 88 return TIPC_ZONE_SCOPE; 89 if (tipc_node(domain)) 90 return TIPC_NODE_SCOPE; 91 if (tipc_cluster(domain)) 92 return TIPC_CLUSTER_SCOPE; 93 return TIPC_ZONE_SCOPE; 94 } 95 96 /** 97 * addr_domain - convert 2-bit scope value to equivalent message lookup domain 98 * 99 * Needed when address of a named message must be looked up a second time 100 * after a network hop. 101 */ 102 103 static inline int addr_domain(int sc) 104 { 105 if (likely(sc == TIPC_NODE_SCOPE)) 106 return tipc_own_addr; 107 if (sc == TIPC_CLUSTER_SCOPE) 108 return tipc_addr(tipc_zone(tipc_own_addr), 109 tipc_cluster(tipc_own_addr), 0); 110 return tipc_addr(tipc_zone(tipc_own_addr), 0, 0); 111 } 112 113 static inline char *addr_string_fill(char *string, u32 addr) 114 { 115 snprintf(string, 16, "<%u.%u.%u>", 116 tipc_zone(addr), tipc_cluster(addr), tipc_node(addr)); 117 return string; 118 } 119 120 int tipc_addr_domain_valid(u32); 121 int tipc_addr_node_valid(u32 addr); 122 123 #endif 124