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-rw-r--r--source4/smb_server/tcon.c209
1 files changed, 209 insertions, 0 deletions
diff --git a/source4/smb_server/tcon.c b/source4/smb_server/tcon.c
new file mode 100644
index 0000000000..b18901325c
--- /dev/null
+++ b/source4/smb_server/tcon.c
@@ -0,0 +1,209 @@
+/*
+ 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 "lib/util/dlinklist.h"
+#include "smb_server/smb_server.h"
+#include "smbd/service_stream.h"
+#include "ntvfs/ntvfs.h"
+
+struct socket_address *smbsrv_get_my_addr(void *p, TALLOC_CTX *mem_ctx)
+{
+ struct smbsrv_connection *smb_conn = talloc_get_type(p,
+ struct smbsrv_connection);
+
+ return socket_get_my_addr(smb_conn->connection->socket, mem_ctx);
+}
+
+struct socket_address *smbsrv_get_peer_addr(void *p, TALLOC_CTX *mem_ctx)
+{
+ struct smbsrv_connection *smb_conn = talloc_get_type(p,
+ struct smbsrv_connection);
+
+ return socket_get_peer_addr(smb_conn->connection->socket, mem_ctx);
+}
+
+/****************************************************************************
+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 socket_address *client_addr;
+
+ client_addr = socket_get_peer_addr(tcon->smb_conn->connection->socket, tcon);
+ DEBUG(3,("%s closed connection to service %s\n",
+ client_addr ? client_addr->addr : "(unknown)",
+ 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);
+}