typedef int (TR_GSS_AUTH_FN)(gss_name_t, TR_NAME *, void *);
typedef TR_MSG *(TR_GSS_HANDLE_REQ_FN)(TALLOC_CTX *, TR_MSG *, void *);
typedef int (TR_GSS_AUTH_FN)(gss_name_t, TR_NAME *, void *);
typedef TR_MSG *(TR_GSS_HANDLE_REQ_FN)(TALLOC_CTX *, TR_MSG *, void *);