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/* GnuTLS glue for GNU Emacs.
Copyright (C) 2010-2013 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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.
GNU Emacs 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#ifndef EMACS_GNUTLS_DEFINED
#define EMACS_GNUTLS_DEFINED
#ifdef HAVE_GNUTLS
#include <gnutls/gnutls.h>
#include <gnutls/x509.h>
/* This limits the attempts to handshake per process (connection). */
#define GNUTLS_EMACS_HANDSHAKES_LIMIT 100
typedef enum
{
/* Initialization stages. */
GNUTLS_STAGE_EMPTY = 0,
GNUTLS_STAGE_CRED_ALLOC,
GNUTLS_STAGE_FILES,
GNUTLS_STAGE_CALLBACKS,
GNUTLS_STAGE_INIT,
GNUTLS_STAGE_PRIORITY,
GNUTLS_STAGE_CRED_SET,
/* Handshake stages. */
GNUTLS_STAGE_HANDSHAKE_CANDO = GNUTLS_STAGE_CRED_SET,
GNUTLS_STAGE_TRANSPORT_POINTERS_SET,
GNUTLS_STAGE_HANDSHAKE_TRIED,
GNUTLS_STAGE_READY,
} gnutls_initstage_t;
#define GNUTLS_EMACS_ERROR_NOT_LOADED GNUTLS_E_APPLICATION_ERROR_MIN + 1
#define GNUTLS_EMACS_ERROR_INVALID_TYPE GNUTLS_E_APPLICATION_ERROR_MIN
#define GNUTLS_INITSTAGE(proc) (XPROCESS (proc)->gnutls_initstage)
#define GNUTLS_PROCESS_USABLE(proc) (GNUTLS_INITSTAGE(proc) >= GNUTLS_STAGE_READY)
#define GNUTLS_LOG(level, max, string) do { if (level <= max) { gnutls_log_function (level, "(Emacs) " string); } } while (0)
#define GNUTLS_LOG2(level, max, string, extra) do { if (level <= max) { gnutls_log_function2 (level, "(Emacs) " string, extra); } } while (0)
#define GNUTLS_LOG2i(level, max, string, extra) do { if (level <= max) { gnutls_log_function2i (level, "(Emacs) " string, extra); } } while (0)
extern ptrdiff_t
emacs_gnutls_write (struct Lisp_Process *proc, const char *buf, ptrdiff_t nbyte);
extern ptrdiff_t
emacs_gnutls_read (struct Lisp_Process *proc, char *buf, ptrdiff_t nbyte);
extern int emacs_gnutls_record_check_pending (gnutls_session_t state);
extern void emacs_gnutls_transport_set_errno (gnutls_session_t state, int err);
extern Lisp_Object emacs_gnutls_deinit (Lisp_Object);
extern void syms_of_gnutls (void);
#endif
#endif
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