1 /* 2 * net/tipc/addr.c: 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 #include "core.h" 38 #include "node.h" 39 #include "addr.h" 40 41 /** 42 * tipc_addr_domain_valid - validates a network domain address 43 * 44 * Accepts <Z.C.N>, <Z.C.0>, <Z.0.0>, and <0.0.0>, 45 * where Z, C, and N are non-zero and do not exceed the configured limits. 46 * 47 * Returns 1 if domain address is valid, otherwise 0 48 */ 49 50 int tipc_addr_domain_valid(u32 addr) 51 { 52 u32 n = tipc_node(addr); 53 u32 c = tipc_cluster(addr); 54 u32 z = tipc_zone(addr); 55 u32 max_nodes = tipc_max_nodes; 56 57 if (n > max_nodes) 58 return 0; 59 60 if (n && (!z || !c)) 61 return 0; 62 if (c && !z) 63 return 0; 64 return 1; 65 } 66 67 /** 68 * tipc_addr_node_valid - validates a proposed network address for this node 69 * 70 * Accepts <Z.C.N>, where Z, C, and N are non-zero and do not exceed 71 * the configured limits. 72 * 73 * Returns 1 if address can be used, otherwise 0 74 */ 75 76 int tipc_addr_node_valid(u32 addr) 77 { 78 return tipc_addr_domain_valid(addr) && tipc_node(addr); 79 } 80 81 int tipc_in_scope(u32 domain, u32 addr) 82 { 83 if (!domain || (domain == addr)) 84 return 1; 85 if (domain == (addr & 0xfffff000u)) /* domain <Z.C.0> */ 86 return 1; 87 if (domain == (addr & 0xff000000u)) /* domain <Z.0.0> */ 88 return 1; 89 return 0; 90 } 91 92 /** 93 * tipc_addr_scope - convert message lookup domain to a 2-bit scope value 94 */ 95 96 int tipc_addr_scope(u32 domain) 97 { 98 if (likely(!domain)) 99 return TIPC_ZONE_SCOPE; 100 if (tipc_node(domain)) 101 return TIPC_NODE_SCOPE; 102 if (tipc_cluster(domain)) 103 return TIPC_CLUSTER_SCOPE; 104 return TIPC_ZONE_SCOPE; 105 } 106 107 char *tipc_addr_string_fill(char *string, u32 addr) 108 { 109 snprintf(string, 16, "<%u.%u.%u>", 110 tipc_zone(addr), tipc_cluster(addr), tipc_node(addr)); 111 return string; 112 } 113