net/tipc/addr.h

   1 /*
   2  * net/tipc/addr.h: Include file for TIPC address utility routines
   3  *
   4  * Copyright (c) 2000-2006, Ericsson AB
   5  * Copyright (c) 2004-2005, Wind River Systems
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the names of the copyright holders nor the names of its
  17  *    contributors may be used to endorse or promote products derived from
  18  *    this software without specific prior written permission.
  19  *
  20  * Alternatively, this software may be distributed under the terms of the
  21  * GNU General Public License ("GPL") version 2 as published by the Free
  22  * Software Foundation.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  25  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  28  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  31  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  32  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  33  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  34  * POSSIBILITY OF SUCH DAMAGE.
  35  */
  36
  37 #ifndef _TIPC_ADDR_H
  38 #define _TIPC_ADDR_H
  39
  40 #define TIPC_ZONE_MASK          0xff000000u
  41 #define TIPC_CLUSTER_MASK       0xfffff000u
  42
  43 static inline u32 tipc_zone_mask(u32 addr)
  44 {
  45         return addr & TIPC_ZONE_MASK;
  46 }
  47
  48 static inline u32 tipc_cluster_mask(u32 addr)
  49 {
  50         return addr & TIPC_CLUSTER_MASK;
  51 }
  52
  53 static inline int in_own_cluster_exact(u32 addr)
  54 {
  55         return !((addr ^ tipc_own_addr) >> 12);
  56 }
  57
  58 /**
  59  * in_own_node - test for node inclusion; <0.0.0> always matches
  60  */
  61 static inline int in_own_node(u32 addr)
  62 {
  63         return (addr == tipc_own_addr) || !addr;
  64 }
  65
  66 /**
  67  * in_own_cluster - test for cluster inclusion; <0.0.0> always matches
  68  */
  69 static inline int in_own_cluster(u32 addr)
  70 {
  71         return in_own_cluster_exact(addr) || !addr;
  72 }
  73
  74 /**
  75  * addr_domain - convert 2-bit scope value to equivalent message lookup domain
  76  *
  77  * Needed when address of a named message must be looked up a second time
  78  * after a network hop.
  79  */
  80 static inline u32 addr_domain(u32 sc)
  81 {
  82         if (likely(sc == TIPC_NODE_SCOPE))
  83                 return tipc_own_addr;
  84         if (sc == TIPC_CLUSTER_SCOPE)
  85                 return tipc_cluster_mask(tipc_own_addr);
  86         return tipc_zone_mask(tipc_own_addr);
  87 }
  88
  89 int tipc_addr_domain_valid(u32);
  90 int tipc_addr_node_valid(u32 addr);
  91 int tipc_in_scope(u32 domain, u32 addr);
  92 int tipc_addr_scope(u32 domain);
  93 char *tipc_addr_string_fill(char *string, u32 addr);
  94 #endif