Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 194 insertions, 0 deletions

diff --git a/source4/smb_server/tcon.c b/source4/smb_server/tcon.c
new file mode 100644
index 0000000..39bc0a5
--- /dev/null
+++ b/source4/smb_server/tcon.c
@@ -0,0 +1,194 @@
+/* 
+   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);
+}