1 /* 2 * net/tipc/addr.c: TIPC address utility routines 3 * 4 * Copyright (c) 2000-2006, Ericsson AB 5 * Copyright (c) 2004-2005, 2010-2011, 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 #include "core.h" 38 #include "addr.h" 39 40 /** 41 * tipc_addr_domain_valid - validates a network domain address 42 * 43 * Accepts <Z.C.N>, <Z.C.0>, <Z.0.0>, and <0.0.0>, 44 * where Z, C, and N are non-zero. 45 * 46 * Returns 1 if domain address is valid, otherwise 0 47 */ 48 int tipc_addr_domain_valid(u32 addr) 49 { 50 u32 n = tipc_node(addr); 51 u32 c = tipc_cluster(addr); 52 u32 z = tipc_zone(addr); 53 54 if (n && (!z || !c)) 55 return 0; 56 if (c && !z) 57 return 0; 58 return 1; 59 } 60 61 /** 62 * tipc_addr_node_valid - validates a proposed network address for this node 63 * 64 * Accepts <Z.C.N>, where Z, C, and N are non-zero. 65 * 66 * Returns 1 if address can be used, otherwise 0 67 */ 68 int tipc_addr_node_valid(u32 addr) 69 { 70 return tipc_addr_domain_valid(addr) && tipc_node(addr); 71 } 72 73 int tipc_in_scope(u32 domain, u32 addr) 74 { 75 if (!domain || (domain == addr)) 76 return 1; 77 if (domain == tipc_cluster_mask(addr)) /* domain <Z.C.0> */ 78 return 1; 79 if (domain == tipc_zone_mask(addr)) /* domain <Z.0.0> */ 80 return 1; 81 return 0; 82 } 83 84 /** 85 * tipc_addr_scope - convert message lookup domain to a 2-bit scope value 86 */ 87 int tipc_addr_scope(u32 domain) 88 { 89 if (likely(!domain)) 90 return TIPC_ZONE_SCOPE; 91 if (tipc_node(domain)) 92 return TIPC_NODE_SCOPE; 93 if (tipc_cluster(domain)) 94 return TIPC_CLUSTER_SCOPE; 95 return TIPC_ZONE_SCOPE; 96 } 97 98 char *tipc_addr_string_fill(char *string, u32 addr) 99 { 100 snprintf(string, 16, "<%u.%u.%u>", 101 tipc_zone(addr), tipc_cluster(addr), tipc_node(addr)); 102 return string; 103 } 104