08c80e9a03
Simplifies routines and data structures that were intended to allow TIPC to support slave nodes (i.e. nodes that did not have links to all of the other nodes in its cluster, forcing TIPC to route messages that it could not deliver directly through a non-slave node). Currently, TIPC supports only networks containing non-slave nodes, so this code is unnecessary. Note: The latest edition of the TIPC 2.0 Specification has eliminated the concept of slave nodes entirely. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
114 lines
3.4 KiB
C
114 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 "cluster.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 (c > tipc_max_clusters)
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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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