2 Unix SMB/CIFS implementation.
3 Manage smbsrv_tcon structures
4 Copyright (C) Andrew Tridgell 1998
5 Copyright (C) Alexander Bokovoy 2002
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include "system/filesys.h"
24 #include "dlinklist.h"
25 #include "smb_server/smb_server.h"
26 #include "smbd/service_stream.h"
27 #include "ntvfs/ntvfs.h"
30 /****************************************************************************
31 init the tcon structures
32 ****************************************************************************/
33 static NTSTATUS smbsrv_init_tcons(struct smbsrv_tcons_context *tcons_ctx, TALLOC_CTX *mem_ctx, uint32_t limit)
36 * the idr_* functions take 'int' as limit,
37 * and only work with a max limit 0x00FFFFFF
41 tcons_ctx->idtree_tid = idr_init(mem_ctx);
42 NT_STATUS_HAVE_NO_MEMORY(tcons_ctx->idtree_tid);
43 tcons_ctx->idtree_limit = limit;
44 tcons_ctx->list = NULL;
49 NTSTATUS smbsrv_smb_init_tcons(struct smbsrv_connection *smb_conn)
51 return smbsrv_init_tcons(&smb_conn->smb_tcons, smb_conn, UINT16_MAX);
54 NTSTATUS smbsrv_smb2_init_tcons(struct smbsrv_session *smb_sess)
56 return smbsrv_init_tcons(&smb_sess->smb2_tcons, smb_sess, UINT32_MAX);
59 /****************************************************************************
60 find a tcon given a tid for SMB
61 ****************************************************************************/
62 static struct smbsrv_tcon *smbsrv_tcon_find(struct smbsrv_tcons_context *tcons_ctx, uint32_t tid)
65 struct smbsrv_tcon *tcon;
67 if (tid == 0) return NULL;
69 if (tid > tcons_ctx->idtree_limit) return NULL;
71 p = idr_find(tcons_ctx->idtree_tid, tid);
74 tcon = talloc_get_type(p, struct smbsrv_tcon);
79 struct smbsrv_tcon *smbsrv_smb_tcon_find(struct smbsrv_connection *smb_conn, uint32_t tid)
81 return smbsrv_tcon_find(&smb_conn->smb_tcons, tid);
84 struct smbsrv_tcon *smbsrv_smb2_tcon_find(struct smbsrv_session *smb_sess, uint32_t tid)
86 if (!smb_sess) return NULL;
87 return smbsrv_tcon_find(&smb_sess->smb2_tcons, tid);
91 destroy a connection structure
93 static int smbsrv_tcon_destructor(void *ptr)
95 struct smbsrv_tcon *tcon = talloc_get_type(ptr, struct smbsrv_tcon);
96 struct smbsrv_tcons_context *tcons_ctx;
98 DEBUG(3,("%s closed connection to service %s\n",
99 socket_get_peer_addr(tcon->smb_conn->connection->socket, tcon),
100 lp_servicename(tcon->service)));
102 /* tell the ntvfs backend that we are disconnecting */
103 if (tcon->ntvfs_ctx) {
104 ntvfs_disconnect(tcon);
107 if (tcon->smb2.session) {
108 tcons_ctx = &tcon->smb2.session->smb2_tcons;
110 tcons_ctx = &tcon->smb_conn->smb_tcons;
113 idr_remove(tcons_ctx->idtree_tid, tcon->tid);
114 DLIST_REMOVE(tcons_ctx->list, tcon);
119 find first available connection slot
121 static struct smbsrv_tcon *smbsrv_tcon_new(struct smbsrv_connection *smb_conn, struct smbsrv_session *smb_sess)
124 struct smbsrv_tcons_context *tcons_ctx;
125 struct smbsrv_tcon *tcon;
130 tcons_ctx = &smb_sess->smb2_tcons;
133 tcons_ctx = &smb_conn->smb_tcons;
136 tcon = talloc_zero(mem_ctx, struct smbsrv_tcon);
137 if (!tcon) return NULL;
138 tcon->smb_conn = smb_conn;
139 tcon->smb2.session = smb_sess;
141 i = idr_get_new_random(tcons_ctx->idtree_tid, tcon, tcons_ctx->idtree_limit);
143 DEBUG(1,("ERROR! Out of connection structures\n"));
148 DLIST_ADD(tcons_ctx->list, tcon);
149 talloc_set_destructor(tcon, smbsrv_tcon_destructor);
151 /* now fill in some statistics */
152 tcon->statistics.connect_time = timeval_current();
157 struct smbsrv_tcon *smbsrv_smb_tcon_new(struct smbsrv_connection *smb_conn)
159 return smbsrv_tcon_new(smb_conn, NULL);
162 struct smbsrv_tcon *smbsrv_smb2_tcon_new(struct smbsrv_session *smb_sess)
164 return smbsrv_tcon_new(smb_sess->smb_conn, smb_sess);