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