src/gnutls.h

   1 /* GnuTLS glue for GNU Emacs.
   2    Copyright (C) 2010-2016 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software: you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation, either version 3 of the License, or
   9 (at your option) any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef EMACS_GNUTLS_DEFINED
  20 #define EMACS_GNUTLS_DEFINED
  21
  22 #ifdef HAVE_GNUTLS
  23 #include <gnutls/gnutls.h>
  24 #include <gnutls/x509.h>
  25
  26 #include "lisp.h"
  27
  28 /* This limits the attempts to handshake per process (connection).  */
  29 #define GNUTLS_EMACS_HANDSHAKES_LIMIT 100
  30
  31 typedef enum
  32 {
  33   /* Initialization stages.  */
  34   GNUTLS_STAGE_EMPTY = 0,
  35   GNUTLS_STAGE_CRED_ALLOC,
  36   GNUTLS_STAGE_FILES,
  37   GNUTLS_STAGE_CALLBACKS,
  38   GNUTLS_STAGE_INIT,
  39   GNUTLS_STAGE_PRIORITY,
  40   GNUTLS_STAGE_CRED_SET,
  41
  42   /* Handshake stages.  */
  43   GNUTLS_STAGE_HANDSHAKE_CANDO = GNUTLS_STAGE_CRED_SET,
  44   GNUTLS_STAGE_TRANSPORT_POINTERS_SET,
  45   GNUTLS_STAGE_HANDSHAKE_TRIED,
  46
  47   GNUTLS_STAGE_READY
  48 } gnutls_initstage_t;
  49
  50 #define GNUTLS_EMACS_ERROR_NOT_LOADED (GNUTLS_E_APPLICATION_ERROR_MIN + 1)
  51 #define GNUTLS_EMACS_ERROR_INVALID_TYPE GNUTLS_E_APPLICATION_ERROR_MIN
  52
  53 #define GNUTLS_INITSTAGE(proc) (XPROCESS (proc)->gnutls_initstage)
  54
  55 #define GNUTLS_PROCESS_USABLE(proc) \
  56   (GNUTLS_INITSTAGE (proc) >= GNUTLS_STAGE_READY)
  57
  58 #define GNUTLS_LOG(level, max, string)                          \
  59   do {                                                          \
  60     if ((level) <= (max))                                       \
  61       gnutls_log_function (level, "(Emacs) " string);           \
  62   } while (false)
  63
  64 #define GNUTLS_LOG2(level, max, string, extra)                  \
  65   do {                                                          \
  66     if ((level) <= (max))                                       \
  67       gnutls_log_function2 (level, "(Emacs) " string, extra);   \
  68   } while (false)
  69
  70 #define GNUTLS_LOG2i(level, max, string, extra)                 \
  71   do {                                                          \
  72     if ((level) <= (max))                                       \
  73       gnutls_log_function2i (level, "(Emacs) " string, extra);  \
  74   } while (false)
  75
  76 extern ptrdiff_t
  77 emacs_gnutls_write (struct Lisp_Process *proc, const char *buf, ptrdiff_t nbyte);
  78 extern ptrdiff_t
  79 emacs_gnutls_read (struct Lisp_Process *proc, char *buf, ptrdiff_t nbyte);
  80
  81 extern ptrdiff_t emacs_gnutls_record_check_pending (gnutls_session_t state);
  82 #ifdef WINDOWSNT
  83 extern void emacs_gnutls_transport_set_errno (gnutls_session_t state, int err);
  84 #endif
  85 extern Lisp_Object emacs_gnutls_deinit (Lisp_Object);
  86
  87 #endif
  88
  89 extern void syms_of_gnutls (void);
  90
  91 #endif