154 lines
4.4 KiB
C
154 lines
4.4 KiB
C
/*
|
|
* net/tipc/addr.c: TIPC address utility routines
|
|
*
|
|
* Copyright (c) 2000-2006, Ericsson AB
|
|
* Copyright (c) 2004-2005, 2010-2011, 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 <linux/kernel.h>
|
|
#include "addr.h"
|
|
#include "core.h"
|
|
|
|
u32 tipc_own_addr(struct net *net)
|
|
{
|
|
struct tipc_net *tn = net_generic(net, tipc_net_id);
|
|
|
|
return tn->own_addr;
|
|
}
|
|
|
|
/**
|
|
* in_own_cluster - test for cluster inclusion; <0.0.0> always matches
|
|
*/
|
|
int in_own_cluster(struct net *net, u32 addr)
|
|
{
|
|
return in_own_cluster_exact(net, addr) || !addr;
|
|
}
|
|
|
|
int in_own_cluster_exact(struct net *net, u32 addr)
|
|
{
|
|
struct tipc_net *tn = net_generic(net, tipc_net_id);
|
|
|
|
return !((addr ^ tn->own_addr) >> 12);
|
|
}
|
|
|
|
/**
|
|
* in_own_node - test for node inclusion; <0.0.0> always matches
|
|
*/
|
|
int in_own_node(struct net *net, u32 addr)
|
|
{
|
|
struct tipc_net *tn = net_generic(net, tipc_net_id);
|
|
|
|
return (addr == tn->own_addr) || !addr;
|
|
}
|
|
|
|
/**
|
|
* addr_domain - convert 2-bit scope value to equivalent message lookup domain
|
|
*
|
|
* Needed when address of a named message must be looked up a second time
|
|
* after a network hop.
|
|
*/
|
|
u32 addr_domain(struct net *net, u32 sc)
|
|
{
|
|
struct tipc_net *tn = net_generic(net, tipc_net_id);
|
|
|
|
if (likely(sc == TIPC_NODE_SCOPE))
|
|
return tn->own_addr;
|
|
if (sc == TIPC_CLUSTER_SCOPE)
|
|
return tipc_cluster_mask(tn->own_addr);
|
|
return tipc_zone_mask(tn->own_addr);
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* 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);
|
|
|
|
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.
|
|
*
|
|
* 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 == tipc_cluster_mask(addr)) /* domain <Z.C.0> */
|
|
return 1;
|
|
if (domain == tipc_zone_mask(addr)) /* 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;
|
|
}
|