2 Unix SMB/CIFS implementation.
3 Manage smbsrv_tcon structures
4 Copyright (C) Andrew Tridgell 1998
5 Copyright (C) Alexander Bokovoy 2002
6 Copyright (C) Stefan Metzmacher 2005-2006
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "smb_server/smb_server.h"
24 #include "smbd/service_stream.h"
25 #include "ntvfs/ntvfs.h"
27 /****************************************************************************
28 init the tcon structures
29 ****************************************************************************/
30 static NTSTATUS smbsrv_init_tcons(struct smbsrv_tcons_context *tcons_ctx, TALLOC_CTX *mem_ctx, uint32_t limit)
33 * the idr_* functions take 'int' as limit,
34 * and only work with a max limit 0x00FFFFFF
38 tcons_ctx->idtree_tid = idr_init(mem_ctx);
39 NT_STATUS_HAVE_NO_MEMORY(tcons_ctx->idtree_tid);
40 tcons_ctx->idtree_limit = limit;
41 tcons_ctx->list = NULL;
46 NTSTATUS smbsrv_smb_init_tcons(struct smbsrv_connection *smb_conn)
48 return smbsrv_init_tcons(&smb_conn->smb_tcons, smb_conn, UINT16_MAX);
51 NTSTATUS smbsrv_smb2_init_tcons(struct smbsrv_session *smb_sess)
53 return smbsrv_init_tcons(&smb_sess->smb2_tcons, smb_sess, UINT32_MAX);
56 /****************************************************************************
57 find a tcon given a tid for SMB
58 ****************************************************************************/
59 static struct smbsrv_tcon *smbsrv_tcon_find(struct smbsrv_tcons_context *tcons_ctx,
60 uint32_t tid, struct timeval request_time)
63 struct smbsrv_tcon *tcon;
65 if (tid == 0) return NULL;
67 if (tid > tcons_ctx->idtree_limit) return NULL;
69 p = idr_find(tcons_ctx->idtree_tid, tid);
72 tcon = talloc_get_type(p, struct smbsrv_tcon);
73 if (!tcon) return NULL;
75 tcon->statistics.last_request_time = request_time;
80 struct smbsrv_tcon *smbsrv_smb_tcon_find(struct smbsrv_connection *smb_conn,
81 uint32_t tid, struct timeval request_time)
83 return smbsrv_tcon_find(&smb_conn->smb_tcons, tid, request_time);
86 struct smbsrv_tcon *smbsrv_smb2_tcon_find(struct smbsrv_session *smb_sess,
87 uint32_t tid, struct timeval request_time)
89 if (!smb_sess) return NULL;
90 return smbsrv_tcon_find(&smb_sess->smb2_tcons, tid, request_time);
94 destroy a connection structure
96 static int smbsrv_tcon_destructor(struct smbsrv_tcon *tcon)
98 struct smbsrv_tcons_context *tcons_ctx;
99 struct socket_address *client_addr;
101 client_addr = socket_get_peer_addr(tcon->smb_conn->connection->socket, tcon);
102 DEBUG(3,("%s closed connection to service %s\n",
103 client_addr ? client_addr->addr : "(unknown)",
106 /* tell the ntvfs backend that we are disconnecting */
108 ntvfs_disconnect(tcon->ntvfs);
112 if (tcon->smb2.session) {
113 tcons_ctx = &tcon->smb2.session->smb2_tcons;
115 tcons_ctx = &tcon->smb_conn->smb_tcons;
118 idr_remove(tcons_ctx->idtree_tid, tcon->tid);
119 DLIST_REMOVE(tcons_ctx->list, tcon);
124 find first available connection slot
126 static struct smbsrv_tcon *smbsrv_tcon_new(struct smbsrv_connection *smb_conn,
127 struct smbsrv_session *smb_sess,
128 const char *share_name)
131 struct smbsrv_tcons_context *tcons_ctx;
132 uint32_t handle_uint_max;
133 struct smbsrv_tcon *tcon;
139 tcons_ctx = &smb_sess->smb2_tcons;
140 handle_uint_max = UINT32_MAX;
143 tcons_ctx = &smb_conn->smb_tcons;
144 handle_uint_max = UINT16_MAX;
147 tcon = talloc_zero(mem_ctx, struct smbsrv_tcon);
148 if (!tcon) return NULL;
149 tcon->smb_conn = smb_conn;
150 tcon->smb2.session = smb_sess;
151 tcon->share_name = talloc_strdup(tcon, share_name);
152 if (!tcon->share_name) goto failed;
155 * the use -1 here, because we don't want to give away the wildcard
156 * fnum used in SMBflush
158 status = smbsrv_init_handles(tcon, handle_uint_max - 1);
159 if (!NT_STATUS_IS_OK(status)) {
160 DEBUG(1,("ERROR! failed to init handles: %s\n", nt_errstr(status)));
164 i = idr_get_new_random(tcons_ctx->idtree_tid, tcon, tcons_ctx->idtree_limit);
166 DEBUG(1,("ERROR! Out of connection structures\n"));
171 DLIST_ADD(tcons_ctx->list, tcon);
172 talloc_set_destructor(tcon, smbsrv_tcon_destructor);
174 /* now fill in some statistics */
175 tcon->statistics.connect_time = timeval_current();
184 struct smbsrv_tcon *smbsrv_smb_tcon_new(struct smbsrv_connection *smb_conn, const char *share_name)
186 return smbsrv_tcon_new(smb_conn, NULL, share_name);
189 struct smbsrv_tcon *smbsrv_smb2_tcon_new(struct smbsrv_session *smb_sess, const char *share_name)
191 return smbsrv_tcon_new(smb_sess->smb_conn, smb_sess, share_name);