addr.c 2.9 KB

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  1. /*
  2. * net/tipc/addr.c: 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. #include "core.h"
  37. #include "dbg.h"
  38. #include "addr.h"
  39. #include "zone.h"
  40. #include "cluster.h"
  41. #include "net.h"
  42. u32 tipc_get_addr(void)
  43. {
  44. return tipc_own_addr;
  45. }
  46. /**
  47. * tipc_addr_domain_valid - validates a network domain address
  48. *
  49. * Accepts <Z.C.N>, <Z.C.0>, <Z.0.0>, and <0.0.0>,
  50. * where Z, C, and N are non-zero and do not exceed the configured limits.
  51. *
  52. * Returns 1 if domain address is valid, otherwise 0
  53. */
  54. int tipc_addr_domain_valid(u32 addr)
  55. {
  56. u32 n = tipc_node(addr);
  57. u32 c = tipc_cluster(addr);
  58. u32 z = tipc_zone(addr);
  59. u32 max_nodes = tipc_max_nodes;
  60. if (is_slave(addr))
  61. max_nodes = LOWEST_SLAVE + tipc_max_slaves;
  62. if (n > max_nodes)
  63. return 0;
  64. if (c > tipc_max_clusters)
  65. return 0;
  66. if (z > tipc_max_zones)
  67. return 0;
  68. if (n && (!z || !c))
  69. return 0;
  70. if (c && !z)
  71. return 0;
  72. return 1;
  73. }
  74. /**
  75. * tipc_addr_node_valid - validates a proposed network address for this node
  76. *
  77. * Accepts <Z.C.N>, where Z, C, and N are non-zero and do not exceed
  78. * the configured limits.
  79. *
  80. * Returns 1 if address can be used, otherwise 0
  81. */
  82. int tipc_addr_node_valid(u32 addr)
  83. {
  84. return (tipc_addr_domain_valid(addr) && tipc_node(addr));
  85. }