netlabel_user.c 3.2 KB

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  1. /*
  2. * NetLabel NETLINK Interface
  3. *
  4. * This file defines the NETLINK interface for the NetLabel system. The
  5. * NetLabel system manages static and dynamic label mappings for network
  6. * protocols such as CIPSO and RIPSO.
  7. *
  8. * Author: Paul Moore <paul.moore@hp.com>
  9. *
  10. */
  11. /*
  12. * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
  13. *
  14. * This program is free software; you can redistribute it and/or modify
  15. * it under the terms of the GNU General Public License as published by
  16. * the Free Software Foundation; either version 2 of the License, or
  17. * (at your option) any later version.
  18. *
  19. * This program is distributed in the hope that it will be useful,
  20. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
  22. * the GNU General Public License for more details.
  23. *
  24. * You should have received a copy of the GNU General Public License
  25. * along with this program; if not, write to the Free Software
  26. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  27. *
  28. */
  29. #include <linux/init.h>
  30. #include <linux/types.h>
  31. #include <linux/list.h>
  32. #include <linux/socket.h>
  33. #include <linux/audit.h>
  34. #include <linux/tty.h>
  35. #include <linux/security.h>
  36. #include <net/sock.h>
  37. #include <net/netlink.h>
  38. #include <net/genetlink.h>
  39. #include <net/netlabel.h>
  40. #include <asm/bug.h>
  41. #include "netlabel_mgmt.h"
  42. #include "netlabel_unlabeled.h"
  43. #include "netlabel_cipso_v4.h"
  44. #include "netlabel_user.h"
  45. /* do not do any auditing if audit_enabled == 0, see kernel/audit.c for
  46. * details */
  47. extern int audit_enabled;
  48. /*
  49. * NetLabel NETLINK Setup Functions
  50. */
  51. /**
  52. * netlbl_netlink_init - Initialize the NETLINK communication channel
  53. *
  54. * Description:
  55. * Call out to the NetLabel components so they can register their families and
  56. * commands with the Generic NETLINK mechanism. Returns zero on success and
  57. * non-zero on failure.
  58. *
  59. */
  60. int netlbl_netlink_init(void)
  61. {
  62. int ret_val;
  63. ret_val = netlbl_mgmt_genl_init();
  64. if (ret_val != 0)
  65. return ret_val;
  66. ret_val = netlbl_cipsov4_genl_init();
  67. if (ret_val != 0)
  68. return ret_val;
  69. ret_val = netlbl_unlabel_genl_init();
  70. if (ret_val != 0)
  71. return ret_val;
  72. return 0;
  73. }
  74. /*
  75. * NetLabel Audit Functions
  76. */
  77. /**
  78. * netlbl_audit_start_common - Start an audit message
  79. * @type: audit message type
  80. * @audit_info: NetLabel audit information
  81. *
  82. * Description:
  83. * Start an audit message using the type specified in @type and fill the audit
  84. * message with some fields common to all NetLabel audit messages. Returns
  85. * a pointer to the audit buffer on success, NULL on failure.
  86. *
  87. */
  88. struct audit_buffer *netlbl_audit_start_common(int type,
  89. struct netlbl_audit *audit_info)
  90. {
  91. struct audit_context *audit_ctx = current->audit_context;
  92. struct audit_buffer *audit_buf;
  93. char *secctx;
  94. u32 secctx_len;
  95. if (audit_enabled == 0)
  96. return NULL;
  97. audit_buf = audit_log_start(audit_ctx, GFP_ATOMIC, type);
  98. if (audit_buf == NULL)
  99. return NULL;
  100. audit_log_format(audit_buf, "netlabel: auid=%u", audit_info->loginuid);
  101. if (audit_info->secid != 0 &&
  102. security_secid_to_secctx(audit_info->secid,
  103. &secctx,
  104. &secctx_len) == 0)
  105. audit_log_format(audit_buf, " subj=%s", secctx);
  106. return audit_buf;
  107. }