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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/*
Unix SMB/CIFS implementation.
Manage smbsrv_tcon structures
Copyright (C) Andrew Tridgell 1998
Copyright (C) Alexander Bokovoy 2002
Copyright (C) Stefan Metzmacher 2005-2006
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 "smb_server/smb_server.h"
#include "samba/service_stream.h"
#include "lib/tsocket/tsocket.h"
#include "ntvfs/ntvfs.h"
/****************************************************************************
init the tcon structures
****************************************************************************/
static NTSTATUS smbsrv_init_tcons(struct smbsrv_tcons_context *tcons_ctx, TALLOC_CTX *mem_ctx, uint32_t limit)
{
/*
* the idr_* functions take 'int' as limit,
* and only work with a max limit 0x00FFFFFF
*/
limit &= 0x00FFFFFF;
tcons_ctx->idtree_tid = idr_init(mem_ctx);
NT_STATUS_HAVE_NO_MEMORY(tcons_ctx->idtree_tid);
tcons_ctx->idtree_limit = limit;
tcons_ctx->list = NULL;
return NT_STATUS_OK;
}
NTSTATUS smbsrv_smb_init_tcons(struct smbsrv_connection *smb_conn)
{
return smbsrv_init_tcons(&smb_conn->smb_tcons, smb_conn, UINT16_MAX);
}
NTSTATUS smbsrv_smb2_init_tcons(struct smbsrv_session *smb_sess)
{
return smbsrv_init_tcons(&smb_sess->smb2_tcons, smb_sess, UINT32_MAX);
}
/****************************************************************************
find a tcon given a tid for SMB
****************************************************************************/
static struct smbsrv_tcon *smbsrv_tcon_find(struct smbsrv_tcons_context *tcons_ctx,
uint32_t tid, struct timeval request_time)
{
void *p;
struct smbsrv_tcon *tcon;
if (tid == 0) return NULL;
if (tid > tcons_ctx->idtree_limit) return NULL;
p = idr_find(tcons_ctx->idtree_tid, tid);
if (!p) return NULL;
tcon = talloc_get_type(p, struct smbsrv_tcon);
if (!tcon) return NULL;
tcon->statistics.last_request_time = request_time;
return tcon;
}
struct smbsrv_tcon *smbsrv_smb_tcon_find(struct smbsrv_connection *smb_conn,
uint32_t tid, struct timeval request_time)
{
return smbsrv_tcon_find(&smb_conn->smb_tcons, tid, request_time);
}
struct smbsrv_tcon *smbsrv_smb2_tcon_find(struct smbsrv_session *smb_sess,
uint32_t tid, struct timeval request_time)
{
if (!smb_sess) return NULL;
return smbsrv_tcon_find(&smb_sess->smb2_tcons, tid, request_time);
}
/*
destroy a connection structure
*/
static int smbsrv_tcon_destructor(struct smbsrv_tcon *tcon)
{
struct smbsrv_tcons_context *tcons_ctx;
struct tsocket_address *client_addr;
client_addr = tcon->smb_conn->connection->remote_address;
DEBUG(3,("%s closed connection to service %s\n",
tsocket_address_string(client_addr, tcon),
tcon->share_name));
/* tell the ntvfs backend that we are disconnecting */
if (tcon->ntvfs) {
ntvfs_disconnect(tcon->ntvfs);
tcon->ntvfs = NULL;
}
if (tcon->smb2.session) {
tcons_ctx = &tcon->smb2.session->smb2_tcons;
} else {
tcons_ctx = &tcon->smb_conn->smb_tcons;
}
idr_remove(tcons_ctx->idtree_tid, tcon->tid);
DLIST_REMOVE(tcons_ctx->list, tcon);
return 0;
}
/*
find first available connection slot
*/
static struct smbsrv_tcon *smbsrv_tcon_new(struct smbsrv_connection *smb_conn,
struct smbsrv_session *smb_sess,
const char *share_name)
{
TALLOC_CTX *mem_ctx;
struct smbsrv_tcons_context *tcons_ctx;
uint32_t handle_uint_max;
struct smbsrv_tcon *tcon;
NTSTATUS status;
int i;
if (smb_sess) {
mem_ctx = smb_sess;
tcons_ctx = &smb_sess->smb2_tcons;
handle_uint_max = UINT32_MAX;
} else {
mem_ctx = smb_conn;
tcons_ctx = &smb_conn->smb_tcons;
handle_uint_max = UINT16_MAX;
}
tcon = talloc_zero(mem_ctx, struct smbsrv_tcon);
if (!tcon) return NULL;
tcon->smb_conn = smb_conn;
tcon->smb2.session = smb_sess;
tcon->share_name = talloc_strdup(tcon, share_name);
if (!tcon->share_name) goto failed;
/*
* the use -1 here, because we don't want to give away the wildcard
* fnum used in SMBflush
*/
status = smbsrv_init_handles(tcon, handle_uint_max - 1);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1,("ERROR! failed to init handles: %s\n", nt_errstr(status)));
goto failed;
}
i = idr_get_new_random(tcons_ctx->idtree_tid, tcon, tcons_ctx->idtree_limit);
if (i == -1) {
DEBUG(1,("ERROR! Out of connection structures\n"));
goto failed;
}
tcon->tid = i;
DLIST_ADD(tcons_ctx->list, tcon);
talloc_set_destructor(tcon, smbsrv_tcon_destructor);
/* now fill in some statistics */
tcon->statistics.connect_time = timeval_current();
return tcon;
failed:
talloc_free(tcon);
return NULL;
}
struct smbsrv_tcon *smbsrv_smb_tcon_new(struct smbsrv_connection *smb_conn, const char *share_name)
{
return smbsrv_tcon_new(smb_conn, NULL, share_name);
}
struct smbsrv_tcon *smbsrv_smb2_tcon_new(struct smbsrv_session *smb_sess, const char *share_name)
{
return smbsrv_tcon_new(smb_sess->smb_conn, smb_sess, share_name);
}
|
