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| 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 "dbg.h" |
| 39 | #include "addr.h" |
| 40 | #include "zone.h" |
| 41 | #include "cluster.h" |
| 42 | #include "net.h" |
| 43 | |
| 44 | u32 tipc_get_addr(void) |
| 45 | { |
| 46 | return tipc_own_addr; |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * tipc_addr_domain_valid - validates a network domain address |
| 51 | * |
| 52 | * Accepts <Z.C.N>, <Z.C.0>, <Z.0.0>, and <0.0.0>, |
| 53 | * where Z, C, and N are non-zero and do not exceed the configured limits. |
| 54 | * |
| 55 | * Returns 1 if domain address is valid, otherwise 0 |
| 56 | */ |
| 57 | |
| 58 | int tipc_addr_domain_valid(u32 addr) |
| 59 | { |
| 60 | u32 n = tipc_node(addr); |
| 61 | u32 c = tipc_cluster(addr); |
| 62 | u32 z = tipc_zone(addr); |
| 63 | u32 max_nodes = tipc_max_nodes; |
| 64 | |
| 65 | if (is_slave(addr)) |
| 66 | max_nodes = LOWEST_SLAVE + tipc_max_slaves; |
| 67 | if (n > max_nodes) |
| 68 | return 0; |
| 69 | if (c > tipc_max_clusters) |
| 70 | return 0; |
| 71 | if (z > tipc_max_zones) |
| 72 | return 0; |
| 73 | |
| 74 | if (n && (!z || !c)) |
| 75 | return 0; |
| 76 | if (c && !z) |
| 77 | return 0; |
| 78 | return 1; |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * tipc_addr_node_valid - validates a proposed network address for this node |
| 83 | * |
| 84 | * Accepts <Z.C.N>, where Z, C, and N are non-zero and do not exceed |
| 85 | * the configured limits. |
| 86 | * |
| 87 | * Returns 1 if address can be used, otherwise 0 |
| 88 | */ |
| 89 | |
| 90 | int tipc_addr_node_valid(u32 addr) |
| 91 | { |
| 92 | return (tipc_addr_domain_valid(addr) && tipc_node(addr)); |
| 93 | } |
| 94 | |
| 95 | int tipc_in_scope(u32 domain, u32 addr) |
| 96 | { |
| 97 | if (!domain || (domain == addr)) |
| 98 | return 1; |
| 99 | if (domain == (addr & 0xfffff000u)) /* domain <Z.C.0> */ |
| 100 | return 1; |
| 101 | if (domain == (addr & 0xff000000u)) /* domain <Z.0.0> */ |
| 102 | return 1; |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * tipc_addr_scope - convert message lookup domain to a 2-bit scope value |
| 108 | */ |
| 109 | |
| 110 | int tipc_addr_scope(u32 domain) |
| 111 | { |
| 112 | if (likely(!domain)) |
| 113 | return TIPC_ZONE_SCOPE; |
| 114 | if (tipc_node(domain)) |
| 115 | return TIPC_NODE_SCOPE; |
| 116 | if (tipc_cluster(domain)) |
| 117 | return TIPC_CLUSTER_SCOPE; |
| 118 | return TIPC_ZONE_SCOPE; |
| 119 | } |
| 120 | |
| 121 | char *tipc_addr_string_fill(char *string, u32 addr) |
| 122 | { |
| 123 | snprintf(string, 16, "<%u.%u.%u>", |
| 124 | tipc_zone(addr), tipc_cluster(addr), tipc_node(addr)); |
| 125 | return string; |
| 126 | } |
| 127 |
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