s3:smbd: add file_fsp_smb2()

metze

2 files changed, 46 insertions, 0 deletions

diff --git a/source3/smbd/files.c b/source3/smbd/files.c
index 1fe5596acf..50ce1b50ca 100644
--- a/source3/smbd/files.c
+++ b/source3/smbd/files.c
@@ -581,6 +581,49 @@ files_struct *file_fsp(struct smb_request *req, uint16 fid)
 	return fsp;
 }
 
+struct files_struct *file_fsp_smb2(struct smbd_smb2_request *smb2req,
+				   uint64_t persistent_id,
+				   uint64_t volatile_id)
+{
+	struct files_struct *fsp;
+
+	if (smb2req->compat_chain_fsp != NULL) {
+		return smb2req->compat_chain_fsp;
+	}
+
+	if (persistent_id != volatile_id) {
+		return NULL;
+	}
+
+	if (volatile_id > UINT16_MAX) {
+		return NULL;
+	}
+
+	fsp = file_fnum(smb2req->sconn, (uint16_t)volatile_id);
+	if (fsp == NULL) {
+		return NULL;
+	}
+
+	if (smb2req->tcon == NULL) {
+		return NULL;
+	}
+
+	if (smb2req->tcon->compat_conn != fsp->conn) {
+		return NULL;
+	}
+
+	if (smb2req->session == NULL) {
+		return NULL;
+	}
+
+	if (smb2req->session->vuid != fsp->vuid) {
+		return NULL;
+	}
+
+	smb2req->compat_chain_fsp = fsp;
+	return fsp;
+}
+
 /****************************************************************************
  Duplicate the file handle part for a DOS or FCB open.
 ****************************************************************************/
diff --git a/source3/smbd/proto.h b/source3/smbd/proto.h
index d81feef073..e7bc3eb5b4 100644
--- a/source3/smbd/proto.h
+++ b/source3/smbd/proto.h
@@ -387,6 +387,9 @@ bool file_find_subpath(files_struct *dir_fsp);
 void file_sync_all(connection_struct *conn);
 void file_free(struct smb_request *req, files_struct *fsp);
 files_struct *file_fsp(struct smb_request *req, uint16 fid);
+struct files_struct *file_fsp_smb2(struct smbd_smb2_request *smb2req,
+				   uint64_t persistent_id,
+				   uint64_t volatile_id);
 NTSTATUS dup_file_fsp(struct smb_request *req, files_struct *from,
 		      uint32 access_mask, uint32 share_access,
 		      uint32 create_options, files_struct *to);