112 lines
3.4 KiB
C
112 lines
3.4 KiB
C
/*
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* net/tipc/addr.c: TIPC address utility routines
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*
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* Copyright (c) 2000-2006, Ericsson AB
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* Copyright (c) 2004-2005, Wind River Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "core.h"
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#include "addr.h"
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/**
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* tipc_addr_domain_valid - validates a network domain address
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*
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* Accepts <Z.C.N>, <Z.C.0>, <Z.0.0>, and <0.0.0>,
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* where Z, C, and N are non-zero and do not exceed the configured limits.
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*
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* Returns 1 if domain address is valid, otherwise 0
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*/
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int tipc_addr_domain_valid(u32 addr)
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{
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u32 n = tipc_node(addr);
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u32 c = tipc_cluster(addr);
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u32 z = tipc_zone(addr);
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u32 max_nodes = tipc_max_nodes;
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if (n > max_nodes)
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return 0;
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if (n && (!z || !c))
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return 0;
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if (c && !z)
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return 0;
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return 1;
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}
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/**
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* tipc_addr_node_valid - validates a proposed network address for this node
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*
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* Accepts <Z.C.N>, where Z, C, and N are non-zero and do not exceed
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* the configured limits.
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*
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* Returns 1 if address can be used, otherwise 0
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*/
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int tipc_addr_node_valid(u32 addr)
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{
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return tipc_addr_domain_valid(addr) && tipc_node(addr);
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}
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int tipc_in_scope(u32 domain, u32 addr)
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{
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if (!domain || (domain == addr))
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return 1;
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if (domain == (addr & 0xfffff000u)) /* domain <Z.C.0> */
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return 1;
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if (domain == (addr & 0xff000000u)) /* domain <Z.0.0> */
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return 1;
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return 0;
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}
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/**
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* tipc_addr_scope - convert message lookup domain to a 2-bit scope value
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*/
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int tipc_addr_scope(u32 domain)
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{
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if (likely(!domain))
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return TIPC_ZONE_SCOPE;
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if (tipc_node(domain))
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return TIPC_NODE_SCOPE;
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if (tipc_cluster(domain))
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return TIPC_CLUSTER_SCOPE;
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return TIPC_ZONE_SCOPE;
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}
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char *tipc_addr_string_fill(char *string, u32 addr)
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{
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snprintf(string, 16, "<%u.%u.%u>",
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tipc_zone(addr), tipc_cluster(addr), tipc_node(addr));
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return string;
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}
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