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 static inline u32 own_node(void)
  41 {
  42         return tipc_node(tipc_own_addr);
  43 }
  44
  45 static inline u32 own_cluster(void)
  46 {
  47         return tipc_cluster(tipc_own_addr);
  48 }
  49
  50 static inline u32 own_zone(void)
  51 {
  52         return tipc_zone(tipc_own_addr);
  53 }
  54
  55 static inline int in_own_cluster(u32 addr)
  56 {
  57         return !((addr ^ tipc_own_addr) >> 12);
  58 }
  59
  60 static inline int is_slave(u32 addr)
  61 {
  62         return addr & 0x800;
  63 }
  64
  65 static inline int may_route(u32 addr)
  66 {
  67         return(addr ^ tipc_own_addr) >> 11;
  68 }
  69
  70 static inline int in_scope(u32 domain, u32 addr)
  71 {
  72         if (!domain || (domain == addr))
  73                 return 1;
  74         if (domain == (addr & 0xfffff000u)) /* domain <Z.C.0> */
  75                 return 1;
  76         if (domain == (addr & 0xff000000u)) /* domain <Z.0.0> */
  77                 return 1;
  78         return 0;
  79 }
  80
  81 /**
  82  * addr_scope - convert message lookup domain to equivalent 2-bit scope value
  83  */
  84
  85 static inline int addr_scope(u32 domain)
  86 {
  87         if (likely(!domain))
  88                 return TIPC_ZONE_SCOPE;
  89         if (tipc_node(domain))
  90                 return TIPC_NODE_SCOPE;
  91         if (tipc_cluster(domain))
  92                 return TIPC_CLUSTER_SCOPE;
  93         return TIPC_ZONE_SCOPE;
  94 }
  95
  96 /**
  97  * addr_domain - convert 2-bit scope value to equivalent message lookup domain
  98  *
  99  * Needed when address of a named message must be looked up a second time
 100  * after a network hop.
 101  */
 102
 103 static inline int addr_domain(int sc)
 104 {
 105         if (likely(sc == TIPC_NODE_SCOPE))
 106                 return tipc_own_addr;
 107         if (sc == TIPC_CLUSTER_SCOPE)
 108                 return tipc_addr(tipc_zone(tipc_own_addr),
 109                                  tipc_cluster(tipc_own_addr), 0);
 110         return tipc_addr(tipc_zone(tipc_own_addr), 0, 0);
 111 }
 112
 113 static inline char *addr_string_fill(char *string, u32 addr)
 114 {
 115         snprintf(string, 16, "<%u.%u.%u>",
 116                  tipc_zone(addr), tipc_cluster(addr), tipc_node(addr));
 117         return string;
 118 }
 119
 120 int tipc_addr_domain_valid(u32);
 121 int tipc_addr_node_valid(u32 addr);
 122
 123 #endif