libcli: introduce smbXcli_conn_support_passthrough()

This routine queries the client connenction whether
it supports query/set InfoLevels beyond 1000 (which,
in Windows OS, is a pass-through mechanism to the
file system).

Signed-off-by: Uri Simchoni <uri@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

2 files changed, 18 insertions, 0 deletions

diff --git a/libcli/smb/smbXcli_base.c b/libcli/smb/smbXcli_base.c
index 9521fc6ca94..1fcf11e6c93 100644
--- a/libcli/smb/smbXcli_base.c
+++ b/libcli/smb/smbXcli_base.c
@@ -468,6 +468,23 @@ bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
 	return false;
 }
 
+/*
+ * [MS-SMB] 2.2.2.3.5 - SMB1 support for passing through
+ * query/set commands to the file system
+ */
+bool smbXcli_conn_support_passthrough(struct smbXcli_conn *conn)
+{
+	if (conn->protocol >= PROTOCOL_SMB2_02) {
+		return true;
+	}
+
+	if (conn->smb1.capabilities & CAP_W2K_SMBS) {
+		return true;
+	}
+
+	return false;
+}
+
 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
 {
 	set_socket_options(conn->sock_fd, options);
diff --git a/libcli/smb/smbXcli_base.h b/libcli/smb/smbXcli_base.h
index 84f4a6bbcc5..1abeb2b180b 100644
--- a/libcli/smb/smbXcli_base.h
+++ b/libcli/smb/smbXcli_base.h
@@ -47,6 +47,7 @@ bool smbXcli_conn_dfs_supported(struct smbXcli_conn *conn);
 
 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn);
 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn);
+bool smbXcli_conn_support_passthrough(struct smbXcli_conn *conn);
 
 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options);
 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn);