1 files changed, 142 insertions, 0 deletions
diff --git a/source4/smb_server/handle.c b/source4/smb_server/handle.c
new file mode 100644
index 0000000..931f77a
--- /dev/null
+++ b/source4/smb_server/handle.c
@@ -0,0 +1,142 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Manage smbsrv_handle structures
+   Copyright (C) Stefan Metzmacher 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"
+
+
+/****************************************************************************
+init the handle structures
+****************************************************************************/
+NTSTATUS smbsrv_init_handles(struct smbsrv_tcon *tcon, uint32_t limit)
+{
+	/* 
+	 * the idr_* functions take 'int' as limit,
+	 * and only work with a max limit 0x00FFFFFF
+	 */
+	limit &= 0x00FFFFFF;
+
+	tcon->handles.idtree_hid	= idr_init(tcon);
+	NT_STATUS_HAVE_NO_MEMORY(tcon->handles.idtree_hid);
+	tcon->handles.idtree_limit	= limit;
+	tcon->handles.list		= NULL;
+
+	return NT_STATUS_OK;
+}
+
+/****************************************************************************
+find a handle given a handle id
+****************************************************************************/
+static struct smbsrv_handle *smbsrv_handle_find(struct smbsrv_handles_context *handles_ctx,
+						uint32_t hid, struct timeval request_time)
+{
+	void *p;
+	struct smbsrv_handle *handle;
+
+	if (hid == 0) return NULL;
+
+	if (hid > handles_ctx->idtree_limit) return NULL;
+
+	p = idr_find(handles_ctx->idtree_hid, hid);
+	if (!p) return NULL;
+
+	handle = talloc_get_type(p, struct smbsrv_handle);
+	if (!handle) return NULL;
+
+	/* only give it away when the ntvfs subsystem has made the handle valid */
+	if (!handle->ntvfs) return NULL;
+
+	handle->statistics.last_use_time = request_time;
+
+	return handle;
+}
+
+struct smbsrv_handle *smbsrv_smb_handle_find(struct smbsrv_tcon *smb_tcon,
+					     uint16_t fnum, struct timeval request_time)
+{
+	return smbsrv_handle_find(&smb_tcon->handles, fnum, request_time);
+}
+
+struct smbsrv_handle *smbsrv_smb2_handle_find(struct smbsrv_tcon *smb_tcon,
+					      uint32_t hid, struct timeval request_time)
+{
+	return smbsrv_handle_find(&smb_tcon->handles, hid, request_time);
+}
+
+/*
+  destroy a connection structure
+*/
+static int smbsrv_handle_destructor(struct smbsrv_handle *handle)
+{
+	struct smbsrv_handles_context *handles_ctx;
+
+	handles_ctx = &handle->tcon->handles;
+
+	idr_remove(handles_ctx->idtree_hid, handle->hid);
+	DLIST_REMOVE(handles_ctx->list, handle);
+	DLIST_REMOVE(handle->session->handles, &handle->session_item);
+
+	/* tell the ntvfs backend that we are disconnecting */
+	if (handle->ntvfs) {
+		talloc_free(handle->ntvfs);
+		handle->ntvfs = NULL;
+	}
+
+	return 0;
+}
+
+/*
+  find first available handle slot
+*/
+struct smbsrv_handle *smbsrv_handle_new(struct smbsrv_session *session,
+				        struct smbsrv_tcon *tcon,
+				        TALLOC_CTX *mem_ctx,
+					struct timeval request_time)
+{
+	struct smbsrv_handles_context *handles_ctx = &tcon->handles;
+	struct smbsrv_handle *handle;
+	int i;
+
+	handle = talloc_zero(mem_ctx, struct smbsrv_handle);
+	if (!handle) return NULL;
+	handle->tcon	= tcon;
+	handle->session	= session;
+	
+	i = idr_get_new_above(handles_ctx->idtree_hid, handle, 1, handles_ctx->idtree_limit);
+	if (i == -1) {
+		DEBUG(1,("ERROR! Out of handle structures\n"));
+		goto failed;
+	}
+	handle->hid = i;
+	handle->session_item.handle = handle;
+
+	DLIST_ADD(handles_ctx->list, handle);
+	DLIST_ADD(session->handles, &handle->session_item);
+	talloc_set_destructor(handle, smbsrv_handle_destructor);
+
+	/* now fill in some statistics */
+	handle->statistics.open_time		= request_time;
+	handle->statistics.last_use_time	= request_time;
+
+	return handle;
+
+failed:
+	talloc_free(handle);
+	return NULL;
+}