net/tipc/addr.c

   1 /*
   2  * net/tipc/addr.c: TIPC address utility routines
   3  *
   4  * Copyright (c) 2000-2006, 2018, Ericsson AB
   5  * Copyright (c) 2004-2005, 2010-2011, 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 #include "addr.h"
  38 #include "core.h"
  39
  40 bool tipc_in_scope(bool legacy_format, u32 domain, u32 addr)
  41 {
  42         if (!domain || (domain == addr))
  43                 return true;
  44         if (!legacy_format)
  45                 return false;
  46         if (domain == tipc_cluster_mask(addr)) /* domain <Z.C.0> */
  47                 return true;
  48         if (domain == (addr & TIPC_ZONE_CLUSTER_MASK)) /* domain <Z.C.0> */
  49                 return true;
  50         if (domain == (addr & TIPC_ZONE_MASK)) /* domain <Z.0.0> */
  51                 return true;
  52         return false;
  53 }
  54
  55 void tipc_set_node_id(struct net *net, u8 *id)
  56 {
  57         struct tipc_net *tn = tipc_net(net);
  58         u32 *tmp = (u32 *)id;
  59
  60         memcpy(tn->node_id, id, NODE_ID_LEN);
  61         tipc_nodeid2string(tn->node_id_string, id);
  62         tn->trial_addr = tmp[0] ^ tmp[1] ^ tmp[2] ^ tmp[3];
  63         pr_info("Own node identity %s, cluster identity %u\n",
  64                 tipc_own_id_string(net), tn->net_id);
  65 }
  66
  67 void tipc_set_node_addr(struct net *net, u32 addr)
  68 {
  69         struct tipc_net *tn = tipc_net(net);
  70         u8 node_id[NODE_ID_LEN] = {0,};
  71
  72         tn->node_addr = addr;
  73         if (!tipc_own_id(net)) {
  74                 sprintf(node_id, "%x", addr);
  75                 tipc_set_node_id(net, node_id);
  76         }
  77         tn->trial_addr = addr;
  78         tn->addr_trial_end = jiffies;
  79         pr_info("32-bit node address hash set to %x\n", addr);
  80 }
  81
  82 char *tipc_nodeid2string(char *str, u8 *id)
  83 {
  84         int i;
  85         u8 c;
  86
  87         /* Already a string ? */
  88         for (i = 0; i < NODE_ID_LEN; i++) {
  89                 c = id[i];
  90                 if (c >= '0' && c <= '9')
  91                         continue;
  92                 if (c >= 'A' && c <= 'Z')
  93                         continue;
  94                 if (c >= 'a' && c <= 'z')
  95                         continue;
  96                 if (c == '.')
  97                         continue;
  98                 if (c == ':')
  99                         continue;
 100                 if (c == '_')
 101                         continue;
 102                 if (c == '-')
 103                         continue;
 104                 if (c == '@')
 105                         continue;
 106                 if (c != 0)
 107                         break;
 108         }
 109         if (i == NODE_ID_LEN) {
 110                 memcpy(str, id, NODE_ID_LEN);
 111                 str[NODE_ID_LEN] = 0;
 112                 return str;
 113         }
 114
 115         /* Translate to hex string */
 116         for (i = 0; i < NODE_ID_LEN; i++)
 117                 sprintf(&str[2 * i], "%02x", id[i]);
 118
 119         /* Strip off trailing zeroes */
 120         for (i = NODE_ID_STR_LEN - 2; str[i] == '0'; i--)
 121                 str[i] = 0;
 122
 123         return str;
 124 }