summaryrefslogtreecommitdiffstats
path: root/source3/lib/sessionid_tdb.c
blob: 5782c9a544358594bf27a2c71ac6887bef13d318 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
/*
   Unix SMB/CIFS implementation.
   Low-level sessionid.tdb access functions
   Copyright (C) Volker Lendecke 2010

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "system/filesys.h"
#include "dbwrap/dbwrap.h"
#include "dbwrap/dbwrap_open.h"
#include "session.h"
#include "util_tdb.h"

static struct db_context *session_db_ctx(void)
{
	static struct db_context *session_db_ctx_ptr;

	if (session_db_ctx_ptr != NULL) {
		return session_db_ctx_ptr;
	}

	session_db_ctx_ptr = db_open(NULL, lock_path("sessionid.tdb"), 0,
				     TDB_CLEAR_IF_FIRST|TDB_DEFAULT|TDB_INCOMPATIBLE_HASH,
				     O_RDWR | O_CREAT, 0644,
				     DBWRAP_LOCK_ORDER_1);
	return session_db_ctx_ptr;
}

bool sessionid_init(void)
{
	if (session_db_ctx() == NULL) {
		DEBUG(1,("session_init: failed to open sessionid tdb\n"));
		return False;
	}

	return True;
}

struct db_record *sessionid_fetch_record(TALLOC_CTX *mem_ctx, const char *key)
{
	struct db_context *db;

	db = session_db_ctx();
	if (db == NULL) {
		return NULL;
	}
	return dbwrap_fetch_locked(db, mem_ctx, string_term_tdb_data(key));
}

struct sessionid_traverse_state {
	int (*fn)(struct db_record *rec, const char *key,
		  struct sessionid *session, void *private_data);
	void *private_data;
};

static int sessionid_traverse_fn(struct db_record *rec, void *private_data)
{
	TDB_DATA key;
	TDB_DATA value;
	struct sessionid_traverse_state *state =
		(struct sessionid_traverse_state *)private_data;
	struct sessionid session;

	key = dbwrap_record_get_key(rec);
	value = dbwrap_record_get_value(rec);
	if ((key.dptr[key.dsize-1] != '\0')
	    || (value.dsize != sizeof(struct sessionid))) {
		DEBUG(1, ("Found invalid record in sessionid.tdb\n"));
		return 0;
	}

	memcpy(&session, value.dptr, sizeof(session));

	return state->fn(rec, (char *)key.dptr, &session,
			 state->private_data);
}

NTSTATUS sessionid_traverse(int (*fn)(struct db_record *rec, const char *key,
				      struct sessionid *session,
				      void *private_data),
			    void *private_data)
{
	struct db_context *db;
	struct sessionid_traverse_state state;
	NTSTATUS status;

	db = session_db_ctx();
	if (db == NULL) {
		return NT_STATUS_UNSUCCESSFUL;
	}
	state.fn = fn;
	state.private_data = private_data;
	status = dbwrap_traverse(db, sessionid_traverse_fn, &state, NULL);
	return status;
}

struct sessionid_traverse_read_state {
	int (*fn)(const char *key, struct sessionid *session,
		  void *private_data);
	void *private_data;
};

static int sessionid_traverse_read_fn(struct db_record *rec,
				      void *private_data)
{
	TDB_DATA key;
	TDB_DATA value;
	struct sessionid_traverse_read_state *state =
		(struct sessionid_traverse_read_state *)private_data;
	struct sessionid session;

	key = dbwrap_record_get_key(rec);
	value = dbwrap_record_get_value(rec);

	if ((key.dptr[key.dsize-1] != '\0')
	    || (value.dsize != sizeof(struct sessionid))) {
		DEBUG(1, ("Found invalid record in sessionid.tdb\n"));
		return 0;
	}

	memcpy(&session, value.dptr, sizeof(session));

	return state->fn((char *)key.dptr, &session,
			 state->private_data);
}

NTSTATUS sessionid_traverse_read(int (*fn)(const char *key,
					  struct sessionid *session,
					  void *private_data),
				 void *private_data)
{
	struct db_context *db;
	struct sessionid_traverse_read_state state;
	NTSTATUS status;

	db = session_db_ctx();
	if (db == NULL) {
		return NT_STATUS_UNSUCCESSFUL;
	}
	state.fn = fn;
	state.private_data = private_data;
	status = dbwrap_traverse_read(db, sessionid_traverse_read_fn, &state,
				      NULL);
	return status;
}