net/tipc/addr.c

   1 /*
   2  * net/tipc/addr.c: TIPC address utility routines
   3  *
   4  * Copyright (c) 2003-2005, Ericsson Research Canada
   5  * Copyright (c) 2004-2005, Wind River Systems
   6  * Copyright (c) 2005-2006, Ericsson AB
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the names of the copyright holders nor the names of its
  18  *    contributors may be used to endorse or promote products derived from
  19  *    this software without specific prior written permission.
  20  *
  21  * Alternatively, this software may be distributed under the terms of the
  22  * GNU General Public License ("GPL") version 2 as published by the Free
  23  * Software Foundation.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  26  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  29  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include "core.h"
  39 #include "dbg.h"
  40 #include "addr.h"
  41 #include "zone.h"
  42 #include "cluster.h"
  43 #include "net.h"
  44
  45 u32 tipc_get_addr(void)
  46 {
  47         return tipc_own_addr;
  48 }
  49
  50 /**
  51  * addr_domain_valid - validates a network domain address
  52  *
  53  * Accepts <Z.C.N>, <Z.C.0>, <Z.0.0>, and <0.0.0>,
  54  * where Z, C, and N are non-zero and do not exceed the configured limits.
  55  *
  56  * Returns 1 if domain address is valid, otherwise 0
  57  */
  58
  59 int addr_domain_valid(u32 addr)
  60 {
  61         u32 n = tipc_node(addr);
  62         u32 c = tipc_cluster(addr);
  63         u32 z = tipc_zone(addr);
  64         u32 max_nodes = tipc_max_nodes;
  65
  66         if (is_slave(addr))
  67                 max_nodes = LOWEST_SLAVE + tipc_max_slaves;
  68         if (n > max_nodes)
  69                 return 0;
  70         if (c > tipc_max_clusters)
  71                 return 0;
  72         if (z > tipc_max_zones)
  73                 return 0;
  74
  75         if (n && (!z || !c))
  76                 return 0;
  77         if (c && !z)
  78                 return 0;
  79         return 1;
  80 }
  81
  82 /**
  83  * addr_node_valid - validates a proposed network address for this node
  84  *
  85  * Accepts <Z.C.N>, where Z, C, and N are non-zero and do not exceed
  86  * the configured limits.
  87  *
  88  * Returns 1 if address can be used, otherwise 0
  89  */
  90
  91 int addr_node_valid(u32 addr)
  92 {
  93         return (addr_domain_valid(addr) && tipc_node(addr));
  94 }
  95