--- /dev/null
+/*
+ * Copyright (c) 2018, JANET(UK)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of JANET(UK) nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef TRUST_ROUTER_TR_GSS_CLIENT_H
+#define TRUST_ROUTER_TR_GSS_CLIENT_H
+
+#include <gssapi.h>
+#include <tr_msg.h>
+
+typedef struct tr_gssc_instance TR_GSSC_INSTANCE;
+
+/* Client instance */
+struct tr_gssc_instance {
+ const char *service_name;
+ gss_ctx_id_t *gss_ctx;
+ int conn;
+};
+
+/* tr_gss_client.c */
+TR_GSSC_INSTANCE *tr_gssc_instance_new(TALLOC_CTX *mem_ctx);
+void tr_gssc_instance_free(TR_GSSC_INSTANCE *tr_gssc);
+int tr_gssc_open_connection(TR_GSSC_INSTANCE *gssc, const char *server, int port);
+TR_MSG *tr_gssc_exchange_msgs(TALLOC_CTX *mem_ctx, TR_GSSC_INSTANCE *gssc, TR_MSG *req_msg);
+
+#endif //TRUST_ROUTER_TR_GSS_CLIENT_H