addr.h 4.0 KB

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  1. /*
  2. * net/tipc/addr.h: Include file for TIPC address utility routines
  3. *
  4. * Copyright (c) 2000-2006, 2018, Ericsson AB
  5. * Copyright (c) 2004-2005, Wind River Systems
  6. * Copyright (c) 2020-2021, Red Hat Inc
  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. #ifndef _TIPC_ADDR_H
  38. #define _TIPC_ADDR_H
  39. #include <linux/types.h>
  40. #include <linux/tipc.h>
  41. #include <net/net_namespace.h>
  42. #include <net/netns/generic.h>
  43. #include "core.h"
  44. /* Struct tipc_uaddr: internal version of struct sockaddr_tipc.
  45. * Must be kept aligned both regarding field positions and size.
  46. */
  47. struct tipc_uaddr {
  48. unsigned short family;
  49. unsigned char addrtype;
  50. signed char scope;
  51. union {
  52. struct {
  53. struct tipc_service_addr sa;
  54. u32 lookup_node;
  55. };
  56. struct tipc_service_range sr;
  57. struct tipc_socket_addr sk;
  58. };
  59. };
  60. static inline void tipc_uaddr(struct tipc_uaddr *ua, u32 atype, u32 scope,
  61. u32 type, u32 lower, u32 upper)
  62. {
  63. ua->family = AF_TIPC;
  64. ua->addrtype = atype;
  65. ua->scope = scope;
  66. ua->sr.type = type;
  67. ua->sr.lower = lower;
  68. ua->sr.upper = upper;
  69. }
  70. static inline bool tipc_uaddr_valid(struct tipc_uaddr *ua, int len)
  71. {
  72. u32 atype;
  73. if (len < sizeof(struct sockaddr_tipc))
  74. return false;
  75. atype = ua->addrtype;
  76. if (ua->family != AF_TIPC)
  77. return false;
  78. if (atype == TIPC_SERVICE_ADDR || atype == TIPC_SOCKET_ADDR)
  79. return true;
  80. if (atype == TIPC_SERVICE_RANGE)
  81. return ua->sr.upper >= ua->sr.lower;
  82. return false;
  83. }
  84. static inline u32 tipc_own_addr(struct net *net)
  85. {
  86. return tipc_net(net)->node_addr;
  87. }
  88. static inline u8 *tipc_own_id(struct net *net)
  89. {
  90. struct tipc_net *tn = tipc_net(net);
  91. if (!strlen(tn->node_id_string))
  92. return NULL;
  93. return tn->node_id;
  94. }
  95. static inline char *tipc_own_id_string(struct net *net)
  96. {
  97. return tipc_net(net)->node_id_string;
  98. }
  99. static inline u32 tipc_cluster_mask(u32 addr)
  100. {
  101. return addr & TIPC_ZONE_CLUSTER_MASK;
  102. }
  103. static inline int tipc_node2scope(u32 node)
  104. {
  105. return node ? TIPC_NODE_SCOPE : TIPC_CLUSTER_SCOPE;
  106. }
  107. static inline int tipc_scope2node(struct net *net, int sc)
  108. {
  109. return sc != TIPC_NODE_SCOPE ? 0 : tipc_own_addr(net);
  110. }
  111. static inline int in_own_node(struct net *net, u32 addr)
  112. {
  113. return addr == tipc_own_addr(net) || !addr;
  114. }
  115. bool tipc_in_scope(bool legacy_format, u32 domain, u32 addr);
  116. void tipc_set_node_id(struct net *net, u8 *id);
  117. void tipc_set_node_addr(struct net *net, u32 addr);
  118. char *tipc_nodeid2string(char *str, u8 *id);
  119. u32 tipc_node_id2hash(u8 *id128);
  120. #endif