| 1 | |
| 2 | |
| 3 | * NetLabel NETLINK Interface
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| 4 | *
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| 5 | * This file defines the NETLINK interface for the NetLabel system. The
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| 6 | * NetLabel system manages static and dynamic label mappings for network
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| 7 | * protocols such as CIPSO and RIPSO.
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| 8 | *
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| 9 | * Author: Paul Moore <[email protected]>
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| 10 |
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| 11 |
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| 12 | |
| 13 | * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
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| 14 |
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| 15 |
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| 16 | #include <linux/init.h>
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| 17 | #include <linux/types.h>
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| 18 | #include <linux/list.h>
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| 19 | #include <linux/socket.h>
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| 20 | #include <linux/audit.h>
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| 21 | #include <linux/tty.h>
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| 22 | #include <linux/security.h>
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| 23 | #include <linux/gfp.h>
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| 24 | #include <net/sock.h>
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| 25 | #include <net/netlink.h>
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| 26 | #include <net/genetlink.h>
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| 27 | #include <net/netlabel.h>
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| 28 | #include <asm/bug.h>
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| 29 |
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| 30 | #include "netlabel_mgmt.h"
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| 31 | #include "netlabel_unlabeled.h"
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| 32 | #include "netlabel_cipso_v4.h"
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| 33 | #include "netlabel_calipso.h"
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| 34 | #include "netlabel_user.h"
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| 35 |
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| 36 | |
| 37 | * NetLabel NETLINK Setup Functions
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| 38 |
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| 39 |
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| 40 | |
| 41 | * netlbl_netlink_init - Initialize the NETLINK communication channel
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| 42 | *
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| 43 | * Description:
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| 44 | * Call out to the NetLabel components so they can register their families and
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| 45 | * commands with the Generic NETLINK mechanism. Returns zero on success and
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| 46 | * non-zero on failure.
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| 47 | *
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| 48 |
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| 49 | int __init netlbl_netlink_init(void)
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| 50 | {
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| 51 | int ret_val;
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| 52 |
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| 53 | ret_val = netlbl_mgmt_genl_init();
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| 54 | if (ret_val != 0)
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| 55 | return ret_val;
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| 56 |
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| 57 | ret_val = netlbl_cipsov4_genl_init();
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| 58 | if (ret_val != 0)
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| 59 | return ret_val;
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| 60 |
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| 61 | ret_val = netlbl_calipso_genl_init();
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| 62 | if (ret_val != 0)
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| 63 | return ret_val;
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| 64 |
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| 65 | return netlbl_unlabel_genl_init();
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| 66 | }
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| 67 |
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| 68 | |
| 69 | * NetLabel Audit Functions
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| 70 |
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| 71 |
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| 72 | |
| 73 | * netlbl_audit_start_common - Start an audit message
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| 74 | * @type: audit message type
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| 75 | * @audit_info: NetLabel audit information
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| 76 | *
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| 77 | * Description:
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| 78 | * Start an audit message using the type specified in @type and fill the audit
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| 79 | * message with some fields common to all NetLabel audit messages. Returns
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| 80 | * a pointer to the audit buffer on success, NULL on failure.
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| 81 | *
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| 82 |
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| 83 | struct audit_buffer *netlbl_audit_start_common(int type,
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| 84 | struct netlbl_audit *audit_info)
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| 85 | {
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| 86 | struct audit_buffer *audit_buf;
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| 87 |
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| 88 | if (audit_enabled == AUDIT_OFF)
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| 89 | return NULL;
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| 90 |
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| 91 | audit_buf = audit_log_start(audit_context(), GFP_ATOMIC, type);
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| 92 | if (audit_buf == NULL)
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| 93 | return NULL;
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| 94 |
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| 95 | audit_log_format(audit_buf, "netlabel: auid=%u ses=%u",
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| 96 | from_kuid(&init_user_ns, audit_info->loginuid),
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| 97 | audit_info->sessionid);
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| 98 | audit_log_subj_ctx(audit_buf, &audit_info->prop);
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| 99 |
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| 100 | return audit_buf;
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| 101 | }
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