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* [PATCH] GnuTLS support on Woe32
@ 2011-03-06 15:16 Claudio Bley
  2011-03-06 16:58 ` Eli Zaretskii
                   ` (2 more replies)
  0 siblings, 3 replies; 142+ messages in thread
From: Claudio Bley @ 2011-03-06 15:16 UTC (permalink / raw)
  To: emacs-devel

Hi.

Please find attached a patch which makes building Emacs with GnuTLS
support on Woe32 possible.

I've build it using the binaries of GnuTLS 2.10.1 by Simon Josefsson
and later also used self-built DLLs of 2.10.4.

I'm using it with SMTP, POP3 and IMAP4. (using STARTTLS and direct
TLS/SSL connections).

Cheers.

- Claudio

PS: Sorry for the delay. :)

[[text/plain; charset=us-ascii
Content-Disposition: inline; filename=GnuTLS-on-Woe32.txt][7bit]]
# Bazaar merge directive format 2 (Bazaar 0.90)
# revision_id: claudio.bley@gmail.com-20110306145751-7c0k4tmlsc09rj4q
# target_branch: bzr+ssh://USERNAME@bzr.savannah.gnu.org/emacs/trunk
# testament_sha1: 43e7b073c148a57eec10eacd12a37d4dfe79dd81
# timestamp: 2011-03-06 16:02:27 +0100
# base_revision_id: rgm@gnu.org-20110304084000-8thi67w6o3ze71wz
# 
# Begin patch
=== modified file 'lib-src/ChangeLog'
--- lib-src/ChangeLog	2011-03-03 07:00:23 +0000
+++ lib-src/ChangeLog	2011-03-06 14:57:51 +0000
@@ -1,3 +1,7 @@
+2011-03-06  Claudio Bley  <claudio.bley@gmail.com>
+
+	* makefile.w32-in (obj): Added gnutls.o.
+
 2011-03-03  Drake Wilson  <drake@begriffli.ch>  (tiny change)
 
 	* emacsclient.c (longopts): Add quiet.

=== modified file 'lib-src/makefile.w32-in'
--- lib-src/makefile.w32-in	2011-02-22 17:51:38 +0000
+++ lib-src/makefile.w32-in	2011-03-06 14:57:51 +0000
@@ -142,7 +142,8 @@
 	syntax.o bytecode.o \
 	process.o callproc.o unexw32.o \
 	region-cache.o sound.o atimer.o \
-	doprnt.o intervals.o textprop.o composite.o
+	doprnt.o intervals.o textprop.o composite.o \
+	gnutls.o
 
 #
 # These are the lisp files that are loaded up in loadup.el

=== modified file 'lisp/ChangeLog'
--- lisp/ChangeLog	2011-03-04 08:40:00 +0000
+++ lisp/ChangeLog	2011-03-06 14:57:51 +0000
@@ -1,3 +1,9 @@
+2011-03-06  Claudio Bley  <claudio.bley@gmail.com>
+
+	* net/gnutls.el (gnutls-negotiate): Check whether default
+	trustfile exists before going to use it. Add missing argument to
+	gnutls-message-maybe call. Return return value.
+
 2011-03-04  Glenn Morris  <rgm@gnu.org>
 
 	* outline.el (outline-regexp): No longer allow nil.

=== modified file 'lisp/gnus/ChangeLog'
--- lisp/gnus/ChangeLog	2011-03-03 13:21:50 +0000
+++ lisp/gnus/ChangeLog	2011-03-06 14:57:51 +0000
@@ -1,3 +1,8 @@
+2011-03-06  Claudio Bley  <claudio.bley@gmail.com>
+
+	* starttls.el (starttls-negotiate-gnutls, starttls-open-stream-gnutls):
+	Check for builtin GnuTLS support and use it if available.
+
 2011-03-03  Tassilo Horn  <tassilo@member.fsf.org>
 
 	* nnimap.el (nnimap-parse-flags): Add a workaround for FETCH lines with

=== modified file 'lisp/gnus/starttls.el'
--- lisp/gnus/starttls.el	2011-01-25 04:08:28 +0000
+++ lisp/gnus/starttls.el	2011-03-06 14:57:51 +0000
@@ -195,37 +195,46 @@
   :type 'regexp
   :group 'starttls)
 
+(eval-and-compile
+  (when (fboundp 'gnutls-boot) (require 'gnutls)))
+
 (defun starttls-negotiate-gnutls (process)
   "Negotiate TLS on PROCESS opened by `open-starttls-stream'.
 This should typically only be done once.  It typically returns a
 multi-line informational message with information about the
 handshake, or nil on failure."
-  (let (buffer info old-max done-ok done-bad)
-    (if (null (setq buffer (process-buffer process)))
-	;; XXX How to remove/extract the TLS negotiation junk?
-	(signal-process (process-id process) 'SIGALRM)
-      (with-current-buffer buffer
-	(save-excursion
-	  (setq old-max (goto-char (point-max)))
-	  (signal-process (process-id process) 'SIGALRM)
-	  (while (and (processp process)
-		      (eq (process-status process) 'run)
-		      (save-excursion
-			(goto-char old-max)
-			(not (or (setq done-ok (re-search-forward
-						starttls-success nil t))
-				 (setq done-bad (re-search-forward
-						 starttls-failure nil t))))))
-	    (accept-process-output process 1 100)
-	    (sit-for 0.1))
-	  (setq info (buffer-substring-no-properties old-max (point-max)))
-	  (delete-region old-max (point-max))
-	  (if (or (and done-ok (not done-bad))
-		  ;; Prevent mitm that fake success msg after failure msg.
-		  (and done-ok done-bad (< done-ok done-bad)))
-	      info
-	    (message "STARTTLS negotiation failed: %s" info)
-	    nil))))))
+  (if (fboundp 'gnutls-boot)
+      (eq t (gnutls-negotiate process nil))
+    (let (buffer info old-max done-ok done-bad)
+      (if (null (setq buffer (process-buffer process)))
+          ;; XXX How to remove/extract the TLS negotiation junk?
+          ;;(signal-process (process-id process) 'SIGALRM)
+          (call-process "kill" nil nil nil
+                        "-ALRM" (format "%d" (process-id process)))
+        (with-current-buffer buffer
+          (save-excursion
+            (setq old-max (goto-char (point-max)))
+            (call-process "kill" nil nil nil
+                          "-ALRM" (format "%d" (process-id process)))
+                                        ;(signal-process (process-id process) 'SIGALRM)
+            (while (and (processp process)
+                        (eq (process-status process) 'run)
+                        (save-excursion
+                          (goto-char old-max)
+                          (not (or (setq done-ok (re-search-forward
+                                                  starttls-success nil t))
+                                   (setq done-bad (re-search-forward
+                                                   starttls-failure nil t))))))
+              (accept-process-output process 1 100)
+              (sit-for 0.1))
+            (setq info (buffer-substring-no-properties old-max (point-max)))
+            (delete-region old-max (point-max))
+            (if (or (and done-ok (not done-bad))
+                    ;; Prevent mitm that fake success msg after failure msg.
+                    (and done-ok done-bad (< done-ok done-bad)))
+                info
+              (message "STARTTLS negotiation failed: %s" info)
+              nil)))))))
 
 (defun starttls-negotiate (process)
   (if starttls-use-gnutls
@@ -241,31 +250,34 @@
 
 (defun starttls-open-stream-gnutls (name buffer host port)
   (message "Opening STARTTLS connection to `%s:%s'..." host port)
-  (let* (done
-	 (old-max (with-current-buffer buffer (point-max)))
-	 (process-connection-type starttls-process-connection-type)
-	 (process (apply #'start-process name buffer
-			 starttls-gnutls-program "-s" host
-			 "-p" (if (integerp port)
-				  (int-to-string port)
-				port)
-			 starttls-extra-arguments)))
-    (starttls-set-process-query-on-exit-flag process nil)
-    (while (and (processp process)
-		(eq (process-status process) 'run)
-		(with-current-buffer buffer
-		  (goto-char old-max)
-		  (not (setq done (re-search-forward
-				   starttls-connect nil t)))))
-      (accept-process-output process 0 100)
-      (sit-for 0.1))
-    (if done
-	(with-current-buffer buffer
-	  (delete-region old-max done))
-      (delete-process process)
-      (setq process nil))
+  (let (done process)
+    (if (fboundp 'gnutls-boot)
+        (setq process (open-network-stream name buffer host port)
+              done (process-status process))
+      (let* ((old-max (with-current-buffer buffer (point-max)))
+             (process-connection-type starttls-process-connection-type))
+        (setq process (apply #'start-process name buffer
+                             starttls-gnutls-program "-s" host
+                             "-p" (if (integerp port)
+                                      (int-to-string port)
+                                    port)
+                             starttls-extra-arguments))
+        (starttls-set-process-query-on-exit-flag process nil)
+        (while (and (processp process)
+                    (eq (process-status process) 'run)
+                    (with-current-buffer buffer
+                      (goto-char old-max)
+                      (not (setq done (re-search-forward
+                                       starttls-connect nil t)))))
+          (accept-process-output process 0 100)
+          (sit-for 0.1))
+        (if done
+            (with-current-buffer buffer
+              (delete-region old-max done))
+          (delete-process process)
+          (setq process nil))))
     (message "Opening STARTTLS connection to `%s:%s'...%s"
-	     host port (if done "done" "failed"))
+             host port (if done "done" "failed"))
     process))
 
 ;;;###autoload

=== modified file 'lisp/net/gnutls.el'
--- lisp/net/gnutls.el	2011-01-25 04:08:28 +0000
+++ lisp/net/gnutls.el	2011-03-06 14:57:51 +0000
@@ -78,7 +78,8 @@
 KEYFILES is a list of client keys."
   (let* ((type (or type 'gnutls-x509pki))
          (trustfiles (or trustfiles
-                        '("/etc/ssl/certs/ca-certificates.crt")))
+                         (when (file-exists-p "/etc/ssl/certs/ca-certificates.crt")
+                              '("/etc/ssl/certs/ca-certificates.crt"))))
          (priority-string (or priority-string
                               (cond
                                ((eq type 'gnutls-anon)
@@ -94,9 +95,9 @@
 
     (gnutls-message-maybe
      (setq ret (gnutls-boot proc type params))
-     "boot: %s")
+     "boot: %s" params)
 
-    proc))
+    ret))
 
 (declare-function gnutls-errorp "gnutls.c" (error))
 (declare-function gnutls-error-string "gnutls.c" (error))

=== modified file 'nt/ChangeLog'
--- nt/ChangeLog	2011-02-27 19:48:31 +0000
+++ nt/ChangeLog	2011-03-06 14:57:51 +0000
@@ -1,3 +1,10 @@
+2011-03-06  Claudio Bley  <claudio.bley@gmail.com>
+
+	* configure.bat: New options --without-gnutls and --lib, new build
+	variable USER_LIBS, automatically detect GnuTLS.
+	* INSTALL: Add instructions for GnuTLS support.
+	* gmake.defs: Prefix USER_LIB's with -l.
+
 2011-02-27  Eli Zaretskii  <eliz@gnu.org>
 
 	* inc/unistd.h (readlink, symlink): Declare prototypes.

=== modified file 'nt/INSTALL'
--- nt/INSTALL	2011-01-26 08:36:39 +0000
+++ nt/INSTALL	2011-03-06 14:57:51 +0000
@@ -306,6 +306,13 @@
   `dynamic-library-alist' and the value of `libpng-version', and
   download compatible DLLs if needed.
 
+* Optional GnuTLS support
+
+  To build Emacs with GnuTLS support, make sure that the
+  gnutls/gnutls.h header file can be found in the include path and
+  link to the appropriate libraries (e.g. gnutls.dll and gcrypt.dll)
+  using the --lib option.
+
 * Experimental SVG support
 
   SVG support is currently experimental, and not built by default.

=== modified file 'nt/configure.bat'
--- nt/configure.bat	2011-01-29 12:36:11 +0000
+++ nt/configure.bat	2011-03-06 14:57:51 +0000
@@ -86,10 +86,13 @@
 set usercflags=
 set docflags=
 set userldflags=
+set userlibs=
 set doldflags=
+set dolibs=
 set sep1=
 set sep2=
 set sep3=
+set sep4=
 set distfiles=
 
 rem ----------------------------------------------------------------------
@@ -107,10 +110,12 @@
 if "%1" == "--no-cygwin" goto nocygwin
 if "%1" == "--cflags" goto usercflags
 if "%1" == "--ldflags" goto userldflags
+if "%1" == "--lib" goto userlibs
 if "%1" == "--without-png" goto withoutpng
 if "%1" == "--without-jpeg" goto withoutjpeg
 if "%1" == "--without-gif" goto withoutgif
 if "%1" == "--without-tiff" goto withouttiff
+if "%1" == "--without-gnutls" goto withoutgnutls
 if "%1" == "--without-xpm" goto withoutxpm
 if "%1" == "--with-svg" goto withsvg
 if "%1" == "--distfiles" goto distfiles
@@ -129,11 +134,13 @@
 echo.   --no-cygwin             use -mno-cygwin option with GCC
 echo.   --cflags FLAG           pass FLAG to compiler
 echo.   --ldflags FLAG          pass FLAG to compiler when linking
+echo.   --lib LIB               link to auxiliary library LIB
 echo.   --without-png           do not use PNG library even if it is installed
 echo.   --without-jpeg          do not use JPEG library even if it is installed
 echo.   --without-gif           do not use GIF library even if it is installed
 echo.   --without-tiff          do not use TIFF library even if it is installed
 echo.   --without-xpm           do not use XPM library even if it is installed
+echo.   --without-gnutls        do not use GNUTLS library even if it is installed
 echo.   --with-svg              use the RSVG library (experimental)
 echo.   --distfiles             path to files for make dist, e.g. libXpm.dll
 goto end
@@ -213,6 +220,14 @@
 shift
 goto again
 
+:userlibs
+shift
+echo. userlibs: %userlibs%
+set userlibs=%userlibs%%sep4%%1
+set sep4= %nothing%
+shift
+goto again
+
 rem ----------------------------------------------------------------------
 
 :withoutpng
@@ -239,6 +254,14 @@
 
 rem ----------------------------------------------------------------------
 
+:withoutgnutls
+set tlssupport=N
+set HAVE_GNUTLS=
+shift
+goto again
+
+rem ----------------------------------------------------------------------
+
 :withouttiff
 set tiffsupport=N
 set HAVE_TIFF=
@@ -467,6 +490,29 @@
 :pngDone
 rm -f junk.c junk.obj
 
+if (%tlssupport%) == (N) goto tlsDone
+
+echo Checking for libgnutls...
+echo #include "gnutls/gnutls.h" >junk.c
+echo main (){} >>junk.c
+rem   -o option is ignored with cl, but allows result to be consistent.
+echo %COMPILER% %usercflags% %mingwflag% -c junk.c -o junk.obj >>config.log
+%COMPILER% %usercflags% %mingwflag% -c junk.c -o junk.obj >junk.out 2>>config.log
+if exist junk.obj goto haveTls
+
+echo ...gnutls.h not found, building without TLS support.
+echo The failed program was: >>config.log
+type junk.c >>config.log
+set HAVE_GNUTLS=
+goto :tlsDone
+
+:haveTls
+echo ...GNUTLS header available, building with GNUTLS support.
+set HAVE_GNUTLS=1
+
+:tlsDone
+rm -f junk.c junk.obj
+
 if (%jpegsupport%) == (N) goto jpegDone
 
 echo Checking for jpeg-6b...
@@ -639,6 +685,8 @@
 if (%docflags%)==(Y) echo USER_CFLAGS=%usercflags%>>config.settings
 for %%v in (%userldflags%) do if not (%%v)==() set doldflags=Y
 if (%doldflags%)==(Y) echo USER_LDFLAGS=%userldflags%>>config.settings
+for %%v in (%userlibs%) do if not (%%v)==() set dolibs=Y
+if (%dolibs%)==(Y) echo USER_LIBS=%userlibs%>>config.settings
 echo # End of settings from configure.bat>>config.settings
 echo. >>config.settings
 
@@ -651,6 +699,7 @@
 if (%doldflags%) == (Y) echo #define USER_LDFLAGS " %userldflags%">>config.tmp
 if (%profile%) == (Y) echo #define PROFILING 1 >>config.tmp
 if not "(%HAVE_PNG%)" == "()" echo #define HAVE_PNG 1 >>config.tmp
+if not "(%HAVE_GNUTLS%)" == "()" echo #define HAVE_GNUTLS 1 >>config.tmp
 if not "(%HAVE_JPEG%)" == "()" echo #define HAVE_JPEG 1 >>config.tmp
 if not "(%HAVE_GIF%)" == "()" echo #define HAVE_GIF 1 >>config.tmp
 if not "(%HAVE_TIFF%)" == "()" echo #define HAVE_TIFF 1 >>config.tmp
@@ -789,6 +838,7 @@
 set HAVE_DISTFILES=
 set distFilesOk=
 set pngsupport=
+set tlssupport=
 set jpegsupport=
 set gifsupport=
 set tiffsupport=

=== modified file 'nt/gmake.defs'
--- nt/gmake.defs	2011-01-25 04:08:28 +0000
+++ nt/gmake.defs	2011-03-06 14:57:51 +0000
@@ -279,6 +279,10 @@
 NOCYGWIN = -mno-cygwin
 endif
 
+ifdef USER_LIBS
+USER_LIBS := $(patsubst %,-l%,$(USER_LIBS))
+endif
+
 ifeq "$(ARCH)" "i386"
 ifdef NOOPT
 ARCH_CFLAGS     = -c $(DEBUG_FLAG) $(NOCYGWIN)

=== modified file 'src/ChangeLog'
--- src/ChangeLog	2011-03-02 21:30:51 +0000
+++ src/ChangeLog	2011-03-06 14:57:51 +0000
@@ -1,3 +1,24 @@
+2011-03-06  Claudio Bley  <claudio.bley@gmail.com>
+
+	* process.c (wait_reading_process_output): Check if GnuTLS
+	buffered some data internally if no FDs are set for TLS
+	connections.
+
+	* makefile.w32-in (OBJ2): Add gnutls.$(O).
+	(LIBS): Link to USER_LIBS.
+	($(BLD)/gnutls.$(0)): New target.
+
+	* gnutls.c (emacs_gnutls_handle_error): New function.
+	(wsaerror_to_errno): Likewise.
+	(emacs_gnutls_pull): New function for GnuTLS on Woe32.
+	(emacs_gnutls_push): Likewise.
+	(emacs_gnutls_handshake): Add Woe32 support. Retry handshake
+	unless a fatal error occured. Call gnutls_alert_send_appropriate
+	on error. Return error code.
+	(emacs_gnutls_write): Call emacs_gnutls_handle_error.
+	(emacs_gnutls_read): Likewise.
+	(Fgnutls_boot): Return handshake error code.
+
 2011-03-02  kbrown  <kbrown@cornell.edu>
 
 	* sheap.c (STATIC_HEAP_SIZE): Increase to 13MB.

=== modified file 'src/gnutls.c'
--- src/gnutls.c	2011-01-25 04:08:28 +0000
+++ src/gnutls.c	2011-03-06 14:57:51 +0000
@@ -26,6 +26,88 @@
 #ifdef HAVE_GNUTLS
 #include <gnutls/gnutls.h>
 
+static int
+emacs_gnutls_handle_error (gnutls_session_t, int err);
+
+#ifdef WINDOWSNT
+#  include "sys/socket.h"
+#  include "systime.h"
+
+/* we need to translate Winsock errors because GnuTLS only checks
+ * for EAGAIN or EINTR */
+static int
+wsaerror_to_errno(int err)
+{
+  switch (err)
+    {
+    case WSAEWOULDBLOCK:
+      return EAGAIN;
+    case WSAEINTR:
+      return EINTR;
+    default:
+      return err;
+    }
+}
+
+static ssize_t
+emacs_gnutls_pull(gnutls_transport_ptr_t p, void* buf, size_t sz)
+{
+  int n, sc;
+  SELECT_TYPE fdset;
+  EMACS_TIME timeout;
+  struct Lisp_Process *proc = (struct Lisp_Process *)p;
+  int fd = proc->infd;
+
+  for (;;)
+    {
+      n = read(fd, (char*)buf, sz);
+
+      if (n >= 0)
+        return n;
+      else
+        {
+          int err = errno;
+
+          if (err == WSAEWOULDBLOCK)
+            {
+              EMACS_SET_SECS_USECS(timeout, 1, 0);
+              FD_ZERO (&fdset);
+              FD_SET ((int)fd, &fdset);
+
+              sc = select (fd + 1, &fdset, (SELECT_TYPE *)0, (SELECT_TYPE *)0, &timeout);
+
+              if (sc > 0)
+                continue;
+              else if (sc == 0)
+                err = EAGAIN;
+              else
+                err = wsaerror_to_errno(errno);
+            }
+          gnutls_transport_set_errno (proc->gnutls_state, err);
+
+          return -1;
+        }
+    }
+}
+
+static ssize_t
+emacs_gnutls_push(gnutls_transport_ptr_t p, const void* buf, size_t sz)
+{
+  struct Lisp_Process *proc = (struct Lisp_Process *)p;
+  int fd = proc->outfd;
+  ssize_t n = write((int)fd, buf, sz);
+
+  if (n >= 0)
+    return n;
+  else
+    {
+      gnutls_transport_set_errno (proc->gnutls_state, wsaerror_to_errno (errno));
+
+      return -1;
+    }
+}
+#endif  /* WINDOWSNT */
+
 Lisp_Object Qgnutls_code;
 Lisp_Object Qgnutls_anon, Qgnutls_x509pki;
 Lisp_Object Qgnutls_e_interrupted, Qgnutls_e_again,
@@ -39,7 +121,7 @@
 Lisp_Object Qgnutls_bootprop_callbacks;
 Lisp_Object Qgnutls_bootprop_loglevel;
 
-static void
+static int
 emacs_gnutls_handshake (struct Lisp_Process *proc)
 {
   gnutls_session_t state = proc->gnutls_state;
@@ -50,17 +132,45 @@
 
   if (proc->gnutls_initstage < GNUTLS_STAGE_TRANSPORT_POINTERS_SET)
     {
+#ifdef WINDOWSNT
+      /* On Windows we cannot transfer socket handles between
+       * different runtime libraries.
+       *
+       * We must handle reading / writing ourselves.
+       */
+      gnutls_transport_set_ptr2 (state,
+                                 (gnutls_transport_ptr_t) proc,
+                                 (gnutls_transport_ptr_t) proc);
+      gnutls_transport_set_push_function(state, &emacs_gnutls_push);
+      gnutls_transport_set_pull_function(state, &emacs_gnutls_pull);
+
+      /* For non blocking sockets or other custom made pull/push
+       * functions the gnutls_transport_set_lowat must be called, with
+       * a zero low water mark value. (GnuTLS 2.10.4 documentation)
+       *
+       * (note: this is probably not strictly necessary as the lowat
+       *  value is only used when no custom pull/push functions are
+       *  set) */
+      gnutls_transport_set_lowat (state, 0);
+#else
       /* This is how GnuTLS takes sockets: as file descriptors passed
          in.  For an Emacs process socket, infd and outfd are the
          same but we use this two-argument version for clarity.  */
       gnutls_transport_set_ptr2 (state,
-				 (gnutls_transport_ptr_t) (long) proc->infd,
-				 (gnutls_transport_ptr_t) (long) proc->outfd);
+        			 (gnutls_transport_ptr_t) proc->infd,
+        			 (gnutls_transport_ptr_t) proc->outfd);
+#endif
 
       proc->gnutls_initstage = GNUTLS_STAGE_TRANSPORT_POINTERS_SET;
     }
 
-  ret = gnutls_handshake (state);
+  do
+    {
+      ret = gnutls_handshake (state);
+      emacs_gnutls_handle_error (state, ret);
+    }
+  while (ret < 0 && gnutls_error_is_fatal (ret) == 0);
+
   proc->gnutls_initstage = GNUTLS_STAGE_HANDSHAKE_TRIED;
 
   if (ret == GNUTLS_E_SUCCESS)
@@ -68,6 +178,11 @@
       /* here we're finally done.  */
       proc->gnutls_initstage = GNUTLS_STAGE_READY;
     }
+  else
+    {
+        gnutls_alert_send_appropriate (state, ret);
+    }
+  return ret;
 }
 
 int
@@ -98,7 +213,11 @@
           if (rtnval == GNUTLS_E_AGAIN || rtnval == GNUTLS_E_INTERRUPTED)
             continue;
           else
-            return (bytes_written ? bytes_written : -1);
+            {
+              emacs_gnutls_handle_error (state, rtnval);
+
+              return (bytes_written ? bytes_written : -1);
+            }
         }
 
       buf += rtnval;
@@ -121,19 +240,57 @@
       emacs_gnutls_handshake (proc);
       return -1;
     }
-
   rtnval = gnutls_read (state, buf, nbyte);
   if (rtnval >= 0)
     return rtnval;
+  else if (emacs_gnutls_handle_error (state, rtnval) == 0)
+    /* non-fatal error */
+    return -1;
   else {
-    if (rtnval == GNUTLS_E_AGAIN ||
-	rtnval == GNUTLS_E_INTERRUPTED)
-      return -1;
-    else
-      return 0;
+    /* a fatal error occured */
+    return 0;
   }
 }
 
+/* Returns zero if the error code was successfully handled.
+ */
+static int
+emacs_gnutls_handle_error (gnutls_session_t session, int err)
+{
+  int alert, ret;
+  const char *err_type, *str;
+
+  if (err >= 0)
+    return 0;
+
+  if (gnutls_error_is_fatal (err) == 0)
+    {
+      ret = 0;
+      err_type = "Non fatal";
+    }
+  else
+    {
+      ret = err;
+      err_type = "Fatal";
+    }
+
+  str = gnutls_strerror (err);
+  if (str == NULL)
+    str = "unknown";
+  message ("gnutls.c *** %s error: %s", err_type, str);
+
+  if (err == GNUTLS_E_WARNING_ALERT_RECEIVED
+      || err == GNUTLS_E_FATAL_ALERT_RECEIVED)
+    {
+      int alert = gnutls_alert_get (session);
+      str = gnutls_alert_get_name (alert);
+      if (str == NULL)
+	str = "unknown";
+      message ("gnutls.c *** Received alert [%d]: %s", alert, str);
+    }
+  return ret;
+}
+
 /* convert an integer error to a Lisp_Object; it will be either a
    known symbol like `gnutls_e_interrupted' and `gnutls_e_again' or
    simply the integer value of the error.  GNUTLS_E_SUCCESS is mapped
@@ -541,9 +698,7 @@
 
   GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CRED_SET;
 
-  emacs_gnutls_handshake (XPROCESS (proc));
-
-  return gnutls_make_error (GNUTLS_E_SUCCESS);
+  return gnutls_make_error(emacs_gnutls_handshake (XPROCESS (proc)));
 }
 
 DEFUN ("gnutls-bye", Fgnutls_bye,

=== modified file 'src/makefile.w32-in'
--- src/makefile.w32-in	2011-02-21 20:00:19 +0000
+++ src/makefile.w32-in	2011-03-06 14:57:51 +0000
@@ -105,6 +105,7 @@
 	$(BLD)/floatfns.$(O)		\
 	$(BLD)/frame.$(O)		\
 	$(BLD)/gmalloc.$(O)		\
+	$(BLD)/gnutls.$(O)		\
 	$(BLD)/intervals.$(O)		\
 	$(BLD)/composite.$(O)		\
 	$(BLD)/ralloc.$(O)		\
@@ -150,6 +151,7 @@
 	$(OLE32)	\
 	$(COMCTL32)	\
 	$(UNISCRIBE)    \
+	$(USER_LIBS)    \
 	$(libc)
 
 #
@@ -944,6 +946,14 @@
 	$(EMACS_ROOT)/nt/inc/unistd.h \
 	$(SRC)/getpagesize.h
 
+$(BLD)/gnutls.$(O) : \
+	$(SRC)/gnutls.h \
+	$(SRC)/gnutls.c \
+	$(CONFIG_H) \
+	$(EMACS_ROOT)/nt/inc/sys/socket.h \
+	$(SRC)/lisp.h \
+	$(SRC)/process.h
+
 $(BLD)/image.$(O) : \
 	$(SRC)/image.c \
 	$(CONFIG_H) \

=== modified file 'src/process.c'
--- src/process.c	2011-02-18 17:37:30 +0000
+++ src/process.c	2011-03-06 14:57:51 +0000
@@ -4785,6 +4785,21 @@
              &Available,
              (check_write ? &Writeok : (SELECT_TYPE *)0),
              (SELECT_TYPE *)0, &timeout);
+
+#ifdef HAVE_GNUTLS
+          /*
+           * GnuTLS buffers data internally. In lowat mode it leaves some data
+           * in the TCP buffers so that select works, but with custom pull/push
+           * functions we need to check if some data is available in the buffers
+           * manually.
+           */
+          if (nfds == 0 && wait_proc && wait_proc->gnutls_p
+              && gnutls_record_check_pending(wait_proc->gnutls_state) > 0)
+          {
+              FD_SET (wait_proc->infd, &Available);
+              nfds = 1;
+          }
+#endif
 	}
 
       xerrno = errno;

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gsn7IA9b8uY7wHe8/I0XURVgIwVPR/4u5IpwoSDJv0iu





^ permalink raw reply	[flat|nested] 142+ messages in thread
end of thread, other threads:[~2011-05-05 12:27 UTC | newest]

Thread overview: 142+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-03-06 15:16 [PATCH] GnuTLS support on Woe32 Claudio Bley
2011-03-06 16:58 ` Eli Zaretskii
2011-03-07  7:44   ` Robert Pluim
2011-03-07 10:44     ` Robert Pluim
2011-03-07 11:04       ` Ted Zlatanov
2011-03-07 12:03         ` Robert Pluim
2011-03-07 21:03       ` Claudio Bley
2011-03-08  8:29         ` Robert Pluim
2011-03-08  8:59           ` Eli Zaretskii
2011-03-08  9:11             ` Robert Pluim
2011-03-08  9:14             ` Lars Magne Ingebrigtsen
2011-03-08  9:29               ` Eli Zaretskii
2011-03-09 21:12         ` Claudio Bley
2011-03-12 12:48           ` Eli Zaretskii
2011-03-13 13:53             ` Claudio Bley
2011-03-13 18:41               ` Eli Zaretskii
2011-03-14  7:43                 ` Claudio Bley
2011-03-14 19:16                   ` Ted Zlatanov
2011-03-15  7:57                     ` Claudio Bley
2011-03-15  9:24                       ` Ted Zlatanov
2011-03-20 21:41                         ` Claudio Bley
2011-03-22  3:20                           ` Ted Zlatanov
2011-03-22  5:40                             ` Stefan Monnier
2011-03-22 13:03                               ` Ted Zlatanov
2011-03-22 16:19                                 ` Robert Pluim
2011-03-22 16:50                                   ` Ted Zlatanov
2011-03-22 17:12                                     ` Robert Pluim
2011-03-22 17:57                                       ` Ted Zlatanov
2011-03-22 18:51                                         ` Stefan Monnier
2011-03-22 18:56                                         ` Robert Pluim
2011-03-22 21:18                                           ` Ted Zlatanov
2011-03-23  8:42                                             ` Robert Pluim
2011-03-22 18:50                                 ` Stefan Monnier
2011-03-22 21:14                                   ` Ted Zlatanov
2011-03-23  1:20                                     ` Stefan Monnier
2011-03-23 15:23                                       ` Ted Zlatanov
2011-03-23 17:50                                         ` Stefan Monnier
2011-03-23 20:57                                           ` Claudio Bley
2011-03-24 19:27                                             ` Ted Zlatanov
2011-03-24 20:07                                               ` Robert Pluim
2011-03-24 20:36                                                 ` Ted Zlatanov
2011-03-25 13:46                                                   ` Robert Pluim
2011-03-25 14:09                                                     ` Ted Zlatanov
2011-04-04  9:58                                               ` Ted Zlatanov
2011-04-14  7:34                                                 ` Deniz Dogan
2011-04-14  9:30                                                   ` Ted Zlatanov
2011-04-15 18:14                                                 ` Ted Zlatanov
2011-04-15 18:23                                                   ` Eli Zaretskii
2011-04-15 22:47                                                     ` Ted Zlatanov
2011-04-15 23:58                                                   ` Richard Stallman
2011-04-16  0:46                                                     ` Ted Zlatanov
2011-04-16  1:45                                                       ` Lars Magne Ingebrigtsen
2011-04-18 15:51                                                         ` Ted Zlatanov
2011-04-21 22:55                                                           ` Ted Zlatanov
2011-04-22  7:07                                                             ` Glenn Morris
2011-04-22 13:12                                                               ` Ted Zlatanov
2011-04-25  1:35                                                                 ` Ted Zlatanov
2011-04-25 12:42                                                                   ` Christoph Scholtes
2011-04-25 12:49                                                                     ` Ted Zlatanov
2011-04-27  1:50                                                                   ` Christoph Scholtes
2011-04-27  3:35                                                                     ` Ted Zlatanov
2011-04-27  3:57                                                                       ` Christoph Scholtes
2011-04-27  4:13                                                                         ` open-network-stream problems on W32 (was: [PATCH] GnuTLS support on Woe32) Ted Zlatanov
2011-04-27  4:34                                                                           ` open-network-stream problems on W32 Christoph Scholtes
2011-05-02 18:37                                                                             ` Ted Zlatanov
2011-05-02 19:00                                                                               ` Ted Zlatanov
2011-05-02 19:15                                                                                 ` Lars Magne Ingebrigtsen
2011-05-02 19:22                                                                                   ` Ted Zlatanov
2011-05-05  3:47                                                                               ` Christoph Scholtes
2011-05-05 10:37                                                                                 ` Eli Zaretskii
2011-05-05 12:27                                                                                   ` Christoph Scholtes
2011-05-05 10:40                                                                                 ` Ted Zlatanov
2011-04-27 12:19                                                                       ` [PATCH] GnuTLS support on Woe32 Juanma Barranquero
2011-05-02 16:20                                                                         ` Juanma Barranquero
2011-05-02 18:29                                                                           ` Ted Zlatanov
2011-05-02 19:00                                                                             ` Juanma Barranquero
2011-05-02 19:12                                                                               ` Ted Zlatanov
2011-05-02 19:38                                                                                 ` Juanma Barranquero
2011-05-02 19:39                                                                                   ` Juanma Barranquero
2011-05-02 19:47                                                                                   ` Ted Zlatanov
2011-05-02 19:53                                                                                     ` Juanma Barranquero
2011-05-02 21:16                                                                                       ` Chong Yidong
2011-05-02 22:45                                                                                         ` Lars Magne Ingebrigtsen
2011-05-02 23:05                                                                                         ` Juanma Barranquero
2011-05-02 20:10                                                                                   ` Tom Tromey
2011-05-02 20:14                                                                                     ` Juanma Barranquero
2011-05-02 20:34                                                                                       ` Eli Zaretskii
2011-05-02 22:46                                                                                   ` Lars Magne Ingebrigtsen
2011-05-02 23:06                                                                                     ` Juanma Barranquero
2011-05-02 19:14                                                                               ` Lars Magne Ingebrigtsen
2011-05-03  2:27                                                                             ` Juanma Barranquero
2011-05-03  4:19                                                                               ` Eli Zaretskii
2011-05-03 10:01                                                                                 ` Juanma Barranquero
2011-05-03 16:47                                                                                   ` Eli Zaretskii
2011-05-03 19:22                                                                                     ` Juanma Barranquero
2011-05-03 23:08                                                                                 ` Juanma Barranquero
2011-05-04  3:05                                                                                   ` Eli Zaretskii
2011-05-04  3:26                                                                                     ` Juanma Barranquero
2011-05-03 14:41                                                                               ` Ted Zlatanov
2011-05-03 18:32                                                                                 ` Andreas Schwab
2011-05-03 18:44                                                                                   ` Drew Adams
2011-05-03 21:28                                                                                     ` Andreas Schwab
2011-05-03 19:15                                                                                   ` Juanma Barranquero
2011-05-03 21:26                                                                                     ` Andreas Schwab
2011-05-03 22:27                                                                                       ` Juanma Barranquero
2011-05-04  7:50                                                                                         ` Andreas Schwab
2011-05-04  8:38                                                                                           ` Juanma Barranquero
2011-05-04  9:04                                                                                             ` David Kastrup
2011-05-04 11:31                                                                                               ` Juanma Barranquero
2011-05-04  5:36                                                                                     ` David Kastrup
2011-05-03 19:35                                                                                 ` Juanma Barranquero
2011-05-03 19:49                                                                                   ` Ted Zlatanov
2011-05-03 19:53                                                                                     ` Juanma Barranquero
2011-05-04  1:30                                                                                 ` Juanma Barranquero
2011-05-04  1:56                                                                                   ` Ted Zlatanov
2011-05-04  3:25                                                                                     ` Juanma Barranquero
2011-05-04  9:33                                                                                       ` Ted Zlatanov
2011-05-04 10:00                                                                                       ` Eli Zaretskii
2011-05-04 11:35                                                                                         ` Juanma Barranquero
2011-03-23 12:25                                     ` Ted Zlatanov
2011-03-23 13:14                                       ` Robert Pluim
2011-03-23 14:58                                         ` Ted Zlatanov
2011-03-23 15:10                                           ` Robert Pluim
2011-03-23 15:49                                             ` Ted Zlatanov
2011-03-23 20:50                               ` Claudio Bley
2011-03-23 21:55                                 ` Stefan Monnier
2011-03-24 15:49                                   ` GNU coding standard highlighting rules (was: [PATCH] GnuTLS support on Woe32) Ted Zlatanov
2011-03-27 21:47                                     ` GNU coding standard highlighting rules Stefan Monnier
2011-03-28 19:28                                       ` Ted Zlatanov
2011-03-23 18:05                       ` [PATCH] GnuTLS support on Woe32 Ted Zlatanov
2011-03-07 11:14     ` Eli Zaretskii
2011-03-07 12:00       ` Robert Pluim
2011-03-07 16:34 ` Lars Magne Ingebrigtsen
2011-03-07 21:33   ` Claudio Bley
2011-03-08  9:16     ` Lars Magne Ingebrigtsen
2011-03-09 21:29       ` Claudio Bley
2011-03-09 21:33         ` Lars Magne Ingebrigtsen
2011-03-10  8:54           ` POP3 UIDL - pop3-leave-mail-on-server (was: [PATCH] GnuTLS support on Woe32) Reiner Steib
2011-03-15 16:08             ` POP3 UIDL - pop3-leave-mail-on-server Lars Magne Ingebrigtsen
2011-03-15 17:49               ` chad
2011-03-08  3:26 ` [PATCH] GnuTLS support on Woe32 Ted Zlatanov
2011-03-09 21:26   ` Claudio Bley

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