New upstream version 2.4.0upstream/2.4.0

1 files changed, 677 insertions, 541 deletions

diff --git a/src/openvpn/error.c b/src/openvpn/error.c
index 425bc30..e78f272 100644
--- a/src/openvpn/error.c
+++ b/src/openvpn/error.c
@@ -5,7 +5,7 @@
  *             packet encryption, packet authentication, and
  *             packet compression.
  *
- *  Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
+ *  Copyright (C) 2002-2017 OpenVPN Technologies, Inc. <sales@openvpn.net>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License version 2
@@ -69,7 +69,7 @@ static int mute_category;   /* GLOBAL */
  */
 
 /* If true, indicates that stdin/stdout/stderr
-   have been redirected due to --log */
+ * have been redirected due to --log */
 static bool std_redir;      /* GLOBAL */
 
 /* Should messages be written to the syslog? */
@@ -98,91 +98,95 @@ static FILE *default_out; /* GLOBAL */
 static FILE *default_err; /* GLOBAL */
 
 void
-msg_forked (void)
+msg_forked(void)
 {
-  forked = true;
+    forked = true;
 }
 
 bool
-set_debug_level (const int level, const unsigned int flags)
+set_debug_level(const int level, const unsigned int flags)
 {
-  const int ceiling = 15;
+    const int ceiling = 15;
 
-  if (level >= 0 && level <= ceiling)
+    if (level >= 0 && level <= ceiling)
     {
-      x_debug_level = level;
-      return true;
+        x_debug_level = level;
+        return true;
     }
-  else if (flags & SDL_CONSTRAIN)
+    else if (flags & SDL_CONSTRAIN)
     {
-      x_debug_level = constrain_int (level, 0, ceiling);
-      return true;
+        x_debug_level = constrain_int(level, 0, ceiling);
+        return true;
     }
-  return false;
+    return false;
 }
 
 bool
-set_mute_cutoff (const int cutoff)
+set_mute_cutoff(const int cutoff)
 {
-  if (cutoff >= 0)
+    if (cutoff >= 0)
     {
-      mute_cutoff = cutoff;
-      return true;
+        mute_cutoff = cutoff;
+        return true;
+    }
+    else
+    {
+        return false;
     }
-  else
-    return false;
 }
 
 int
-get_debug_level (void)
+get_debug_level(void)
 {
-  return x_debug_level;
+    return x_debug_level;
 }
 
 int
-get_mute_cutoff (void)
+get_mute_cutoff(void)
 {
-  return mute_cutoff;
+    return mute_cutoff;
 }
 
 void
-set_suppress_timestamps (bool suppressed)
+set_suppress_timestamps(bool suppressed)
 {
-  suppress_timestamps = suppressed;
+    suppress_timestamps = suppressed;
 }
 
 void
-set_machine_readable_output (bool parsable)
+set_machine_readable_output(bool parsable)
 {
-  machine_readable_output = parsable;
+    machine_readable_output = parsable;
 }
 
 void
-error_reset ()
+error_reset()
 {
-  use_syslog = std_redir = false;
-  suppress_timestamps = false;
-  machine_readable_output = false;
-  x_debug_level = 1;
-  mute_cutoff = 0;
-  mute_count = 0;
-  mute_category = 0;
-  default_out = OPENVPN_MSG_FP;
-  default_err = OPENVPN_MSG_FP;
+    use_syslog = std_redir = false;
+    suppress_timestamps = false;
+    machine_readable_output = false;
+    x_debug_level = 1;
+    mute_cutoff = 0;
+    mute_count = 0;
+    mute_category = 0;
+    default_out = OPENVPN_MSG_FP;
+    default_err = OPENVPN_MSG_FP;
 
 #ifdef OPENVPN_DEBUG_COMMAND_LINE
-  msgfp = fopen (OPENVPN_DEBUG_FILE, "w");
-  if (!msgfp)
-    openvpn_exit (OPENVPN_EXIT_STATUS_CANNOT_OPEN_DEBUG_FILE); /* exit point */
-#else
-  msgfp = NULL;
+    msgfp = fopen(OPENVPN_DEBUG_FILE, "w");
+    if (!msgfp)
+    {
+        openvpn_exit(OPENVPN_EXIT_STATUS_CANNOT_OPEN_DEBUG_FILE); /* exit point */
+    }
+#else  /* ifdef OPENVPN_DEBUG_COMMAND_LINE */
+    msgfp = NULL;
 #endif
 }
 
 void
-errors_to_stderr (void)
+errors_to_stderr(void)
 {
-  default_err = OPENVPN_ERROR_FP;  
+    default_err = OPENVPN_ERROR_FP;
 }
 
 /*
@@ -191,216 +195,254 @@ errors_to_stderr (void)
 FILE *
 msg_fp(const unsigned int flags)
 {
-  FILE *fp = msgfp;
-  if (!fp)
-    fp = (flags & (M_FATAL|M_USAGE_SMALL)) ? default_err : default_out;
-  if (!fp)
-    openvpn_exit (OPENVPN_EXIT_STATUS_CANNOT_OPEN_DEBUG_FILE); /* exit point */
-  return fp;
+    FILE *fp = msgfp;
+    if (!fp)
+    {
+        fp = (flags & (M_FATAL|M_USAGE_SMALL)) ? default_err : default_out;
+    }
+    if (!fp)
+    {
+        openvpn_exit(OPENVPN_EXIT_STATUS_CANNOT_OPEN_DEBUG_FILE); /* exit point */
+    }
+    return fp;
 }
 
 #define SWAP { tmp = m1; m1 = m2; m2 = tmp; }
 
 int x_msg_line_num; /* GLOBAL */
 
-void x_msg (const unsigned int flags, const char *format, ...)
+void
+x_msg(const unsigned int flags, const char *format, ...)
 {
-  va_list arglist;
-  va_start (arglist, format);
-  x_msg_va (flags, format, arglist);
-  va_end (arglist);
+    va_list arglist;
+    va_start(arglist, format);
+    x_msg_va(flags, format, arglist);
+    va_end(arglist);
 }
 
-void x_msg_va (const unsigned int flags, const char *format, va_list arglist)
+void
+x_msg_va(const unsigned int flags, const char *format, va_list arglist)
 {
-  struct gc_arena gc;
+    struct gc_arena gc;
 #if SYSLOG_CAPABILITY
-  int level;
+    int level;
 #endif
-  char *m1;
-  char *m2;
-  char *tmp;
-  int e;
-  const char *prefix;
-  const char *prefix_sep;
+    char *m1;
+    char *m2;
+    char *tmp;
+    int e;
+    const char *prefix;
+    const char *prefix_sep;
 
-  void usage_small (void);
+    void usage_small(void);
 
 #ifndef HAVE_VARARG_MACROS
-  /* the macro has checked this otherwise */
-  if (!msg_test (flags))
-    return;
+    /* the macro has checked this otherwise */
+    if (!msg_test(flags))
+    {
+        return;
+    }
 #endif
 
-  e = openvpn_errno ();
+    e = openvpn_errno();
 
-  /*
-   * Apply muting filter.
-   */
+    /*
+     * Apply muting filter.
+     */
 #ifndef HAVE_VARARG_MACROS
-  /* the macro has checked this otherwise */
-  if (!dont_mute (flags))
-    return;
+    /* the macro has checked this otherwise */
+    if (!dont_mute(flags))
+    {
+        return;
+    }
 #endif
 
-  gc_init (&gc);
+    gc_init(&gc);
 
-  m1 = (char *) gc_malloc (ERR_BUF_SIZE, false, &gc);
-  m2 = (char *) gc_malloc (ERR_BUF_SIZE, false, &gc);
+    m1 = (char *) gc_malloc(ERR_BUF_SIZE, false, &gc);
+    m2 = (char *) gc_malloc(ERR_BUF_SIZE, false, &gc);
 
-  vsnprintf (m1, ERR_BUF_SIZE, format, arglist);
-  m1[ERR_BUF_SIZE - 1] = 0; /* windows vsnprintf needs this */
+    vsnprintf(m1, ERR_BUF_SIZE, format, arglist);
+    m1[ERR_BUF_SIZE - 1] = 0; /* windows vsnprintf needs this */
 
-  if ((flags & M_ERRNO) && e)
+    if ((flags & M_ERRNO) && e)
     {
-      openvpn_snprintf (m2, ERR_BUF_SIZE, "%s: %s (errno=%d)",
-			m1, strerror_ts (e, &gc), e);
-      SWAP;
+        openvpn_snprintf(m2, ERR_BUF_SIZE, "%s: %s (errno=%d)",
+                         m1, strerror_ts(e, &gc), e);
+        SWAP;
     }
 
-  if (flags & M_OPTERR)
+    if (flags & M_OPTERR)
     {
-      openvpn_snprintf (m2, ERR_BUF_SIZE, "Options error: %s", m1);
-      SWAP;
+        openvpn_snprintf(m2, ERR_BUF_SIZE, "Options error: %s", m1);
+        SWAP;
     }
 
 #if SYSLOG_CAPABILITY
-  if (flags & (M_FATAL|M_NONFATAL|M_USAGE_SMALL))
-    level = LOG_ERR;
-  else if (flags & M_WARN)
-    level = LOG_WARNING;
-  else
-    level = LOG_NOTICE;
+    if (flags & (M_FATAL|M_NONFATAL|M_USAGE_SMALL))
+    {
+        level = LOG_ERR;
+    }
+    else if (flags & M_WARN)
+    {
+        level = LOG_WARNING;
+    }
+    else
+    {
+        level = LOG_NOTICE;
+    }
 #endif
 
-  /* set up client prefix */
-  if (flags & M_NOIPREFIX)
-    prefix = NULL;
-  else
-    prefix = msg_get_prefix ();
-  prefix_sep = " ";
-  if (!prefix)
-    prefix_sep = prefix = "";
-
-  /* virtual output capability used to copy output to management subsystem */
-  if (!forked)
-    {
-      const struct virtual_output *vo = msg_get_virtual_output ();
-      if (vo)
-	{
-	  openvpn_snprintf (m2, ERR_BUF_SIZE, "%s%s%s",
-			    prefix,
-			    prefix_sep,
-			    m1);
-	  virtual_output_print (vo, flags, m2);
-	}
-    }
-
-  if (!(flags & M_MSG_VIRT_OUT))
-    {
-      if (use_syslog && !std_redir && !forked)
-	{
+    /* set up client prefix */
+    if (flags & M_NOIPREFIX)
+    {
+        prefix = NULL;
+    }
+    else
+    {
+        prefix = msg_get_prefix();
+    }
+    prefix_sep = " ";
+    if (!prefix)
+    {
+        prefix_sep = prefix = "";
+    }
+
+    /* virtual output capability used to copy output to management subsystem */
+    if (!forked)
+    {
+        const struct virtual_output *vo = msg_get_virtual_output();
+        if (vo)
+        {
+            openvpn_snprintf(m2, ERR_BUF_SIZE, "%s%s%s",
+                             prefix,
+                             prefix_sep,
+                             m1);
+            virtual_output_print(vo, flags, m2);
+        }
+    }
+
+    if (!(flags & M_MSG_VIRT_OUT))
+    {
+        if (use_syslog && !std_redir && !forked)
+        {
 #if SYSLOG_CAPABILITY
-	  syslog (level, "%s%s%s",
-		  prefix,
-		  prefix_sep,
-		  m1);
+            syslog(level, "%s%s%s",
+                   prefix,
+                   prefix_sep,
+                   m1);
 #endif
-	}
-      else
-	{
-	  FILE *fp = msg_fp(flags);
-	  const bool show_usec = check_debug_level (DEBUG_LEVEL_USEC_TIME);
-
-	  if (machine_readable_output)
-	    {
-	      struct timeval tv;
-	      gettimeofday (&tv, NULL);
-
-	      fprintf (fp, "%lu.%06lu %x %s%s%s%s",
-		       tv.tv_sec,
-		       (unsigned long)tv.tv_usec,
-		       flags,
-		       prefix,
-		       prefix_sep,
-		       m1,
-		       "\n");
-
-	    }
-	  else if ((flags & M_NOPREFIX) || suppress_timestamps)
-	    {
-	      fprintf (fp, "%s%s%s%s",
-		       prefix,
-		       prefix_sep,
-		       m1,
-		       (flags&M_NOLF) ? "" : "\n");
-	    }
-	  else
-	    {
-	      fprintf (fp, "%s %s%s%s%s",
-		       time_string (0, 0, show_usec, &gc),
-		       prefix,
-		       prefix_sep,
-		       m1,
-		       (flags&M_NOLF) ? "" : "\n");
-	    }
-	  fflush(fp);
-	  ++x_msg_line_num;
-	}
-    }
-
-  if (flags & M_FATAL)
-    msg (M_INFO, "Exiting due to fatal error");
-
-  if (flags & M_FATAL)
-    openvpn_exit (OPENVPN_EXIT_STATUS_ERROR); /* exit point */
-
-  if (flags & M_USAGE_SMALL)
-    usage_small ();
-
-  gc_free (&gc);
+        }
+        else
+        {
+            FILE *fp = msg_fp(flags);
+            const bool show_usec = check_debug_level(DEBUG_LEVEL_USEC_TIME);
+
+            if (machine_readable_output)
+            {
+                struct timeval tv;
+                gettimeofday(&tv, NULL);
+
+                fprintf(fp, "%lu.%06lu %x %s%s%s%s",
+                        tv.tv_sec,
+                        (unsigned long)tv.tv_usec,
+                        flags,
+                        prefix,
+                        prefix_sep,
+                        m1,
+                        "\n");
+
+            }
+            else if ((flags & M_NOPREFIX) || suppress_timestamps)
+            {
+                fprintf(fp, "%s%s%s%s",
+                        prefix,
+                        prefix_sep,
+                        m1,
+                        (flags&M_NOLF) ? "" : "\n");
+            }
+            else
+            {
+                fprintf(fp, "%s %s%s%s%s",
+                        time_string(0, 0, show_usec, &gc),
+                        prefix,
+                        prefix_sep,
+                        m1,
+                        (flags&M_NOLF) ? "" : "\n");
+            }
+            fflush(fp);
+            ++x_msg_line_num;
+        }
+    }
+
+    if (flags & M_FATAL)
+    {
+        msg(M_INFO, "Exiting due to fatal error");
+    }
+
+    if (flags & M_FATAL)
+    {
+        openvpn_exit(OPENVPN_EXIT_STATUS_ERROR); /* exit point */
+
+    }
+    if (flags & M_USAGE_SMALL)
+    {
+        usage_small();
+    }
+
+    gc_free(&gc);
 }
 
 /*
  * Apply muting filter.
  */
 bool
-dont_mute (unsigned int flags)
+dont_mute(unsigned int flags)
 {
-  bool ret = true;
-  if (mute_cutoff > 0 && !(flags & M_NOMUTE))
-    {
-      const int mute_level = DECODE_MUTE_LEVEL (flags);
-      if (mute_level > 0 && mute_level == mute_category)
-	{
-	  if (mute_count == mute_cutoff)
-	    msg (M_INFO | M_NOMUTE, "NOTE: --mute triggered...");
-	  if (++mute_count > mute_cutoff)
-	    ret = false;
-	}
-      else
-	{
-	  const int suppressed = mute_count - mute_cutoff;
-	  if (suppressed > 0)
-	    msg (M_INFO | M_NOMUTE,
-		 "%d variation(s) on previous %d message(s) suppressed by --mute",
-		 suppressed,
-		 mute_cutoff);
-	  mute_count = 1;
-	  mute_category = mute_level;
-	}
-    }
-  return ret;
+    bool ret = true;
+    if (mute_cutoff > 0 && !(flags & M_NOMUTE))
+    {
+        const int mute_level = DECODE_MUTE_LEVEL(flags);
+        if (mute_level > 0 && mute_level == mute_category)
+        {
+            if (mute_count == mute_cutoff)
+            {
+                msg(M_INFO | M_NOMUTE, "NOTE: --mute triggered...");
+            }
+            if (++mute_count > mute_cutoff)
+            {
+                ret = false;
+            }
+        }
+        else
+        {
+            const int suppressed = mute_count - mute_cutoff;
+            if (suppressed > 0)
+            {
+                msg(M_INFO | M_NOMUTE,
+                    "%d variation(s) on previous %d message(s) suppressed by --mute",
+                    suppressed,
+                    mute_cutoff);
+            }
+            mute_count = 1;
+            mute_category = mute_level;
+        }
+    }
+    return ret;
 }
 
 void
-assert_failed (const char *filename, int line, const char *condition)
+assert_failed(const char *filename, int line, const char *condition)
 {
-  if (condition)
-    msg (M_FATAL, "Assertion failed at %s:%d (%s)", filename, line, condition);
-  else
-    msg (M_FATAL, "Assertion failed at %s:%d", filename, line);
-  _exit(1);
+    if (condition)
+    {
+        msg(M_FATAL, "Assertion failed at %s:%d (%s)", filename, line, condition);
+    }
+    else
+    {
+        msg(M_FATAL, "Assertion failed at %s:%d", filename, line);
+    }
+    _exit(1);
 }
 
 /*
@@ -408,47 +450,49 @@ assert_failed (const char *filename, int line, const char *condition)
  * to allocate memory as part of its operation.
  */
 void
-out_of_memory (void)
+out_of_memory(void)
 {
-  fprintf (stderr, PACKAGE_NAME ": Out of Memory\n");
-  exit (1);
+    fprintf(stderr, PACKAGE_NAME ": Out of Memory\n");
+    exit(1);
 }
 
 void
-open_syslog (const char *pgmname, bool stdio_to_null)
+open_syslog(const char *pgmname, bool stdio_to_null)
 {
 #if SYSLOG_CAPABILITY
-  if (!msgfp && !std_redir)
+    if (!msgfp && !std_redir)
     {
-      if (!use_syslog)
-	{
-	  pgmname_syslog = string_alloc (pgmname ? pgmname : PACKAGE, NULL);
-	  openlog (pgmname_syslog, LOG_PID, LOG_OPENVPN);
-	  use_syslog = true;
-
-	  /* Better idea: somehow pipe stdout/stderr output to msg() */
-	  if (stdio_to_null)
-	    set_std_files_to_null (false);
-	}
+        if (!use_syslog)
+        {
+            pgmname_syslog = string_alloc(pgmname ? pgmname : PACKAGE, NULL);
+            openlog(pgmname_syslog, LOG_PID, LOG_OPENVPN);
+            use_syslog = true;
+
+            /* Better idea: somehow pipe stdout/stderr output to msg() */
+            if (stdio_to_null)
+            {
+                set_std_files_to_null(false);
+            }
+        }
     }
-#else
-  msg (M_WARN, "Warning on use of --daemon/--inetd: this operating system lacks daemon logging features, therefore when I become a daemon, I won't be able to log status or error messages");
+#else  /* if SYSLOG_CAPABILITY */
+    msg(M_WARN, "Warning on use of --daemon/--inetd: this operating system lacks daemon logging features, therefore when I become a daemon, I won't be able to log status or error messages");
 #endif
 }
 
 void
-close_syslog ()
+close_syslog()
 {
 #if SYSLOG_CAPABILITY
-  if (use_syslog)
+    if (use_syslog)
     {
-      closelog();
-      use_syslog = false;
-      if (pgmname_syslog)
-	{
-	  free (pgmname_syslog);
-	  pgmname_syslog = NULL;
-	}
+        closelog();
+        use_syslog = false;
+        if (pgmname_syslog)
+        {
+            free(pgmname_syslog);
+            pgmname_syslog = NULL;
+        }
     }
 #endif
 }
@@ -458,108 +502,128 @@ close_syslog ()
 static HANDLE orig_stderr;
 
 HANDLE
-get_orig_stderr (void)
+get_orig_stderr(void)
 {
-  if (orig_stderr)
-    return orig_stderr;
-  else
-    return GetStdHandle (STD_ERROR_HANDLE);
+    if (orig_stderr)
+    {
+        return orig_stderr;
+    }
+    else
+    {
+        return GetStdHandle(STD_ERROR_HANDLE);
+    }
 }
 
 #endif
 
 void
-redirect_stdout_stderr (const char *file, bool append)
+redirect_stdout_stderr(const char *file, bool append)
 {
 #if defined(_WIN32)
-  if (!std_redir)
-    {
-      struct gc_arena gc = gc_new ();
-      HANDLE log_handle;
-      int log_fd;
-
-      SECURITY_ATTRIBUTES saAttr; 
-      saAttr.nLength = sizeof(SECURITY_ATTRIBUTES); 
-      saAttr.bInheritHandle = TRUE; 
-      saAttr.lpSecurityDescriptor = NULL; 
-
-      log_handle = CreateFileW (wide_string (file, &gc),
-                                GENERIC_WRITE,
-                                FILE_SHARE_READ,
-                                &saAttr,
-                                append ? OPEN_ALWAYS : CREATE_ALWAYS,
-                                FILE_ATTRIBUTE_NORMAL,
-                                NULL);
-
-      gc_free (&gc);
-
-      if (log_handle == INVALID_HANDLE_VALUE)
-	{
-	  msg (M_WARN|M_ERRNO, "Warning: cannot open --log file: %s", file);
-	  return;
-	}
-
-      /* append to logfile? */
-      if (append)
-	{
-	  if (SetFilePointer (log_handle, 0, NULL, FILE_END) == INVALID_SET_FILE_POINTER)
-	    msg (M_ERR, "Error: cannot seek to end of --log file: %s", file);
-	}
-      
-      /* save original stderr for password prompts */
-      orig_stderr = GetStdHandle (STD_ERROR_HANDLE);
+    if (!std_redir)
+    {
+        struct gc_arena gc = gc_new();
+        HANDLE log_handle;
+        int log_fd;
+
+        SECURITY_ATTRIBUTES saAttr;
+        saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
+        saAttr.bInheritHandle = TRUE;
+        saAttr.lpSecurityDescriptor = NULL;
+
+        log_handle = CreateFileW(wide_string(file, &gc),
+                                 GENERIC_WRITE,
+                                 FILE_SHARE_READ,
+                                 &saAttr,
+                                 append ? OPEN_ALWAYS : CREATE_ALWAYS,
+                                 FILE_ATTRIBUTE_NORMAL,
+                                 NULL);
+
+        gc_free(&gc);
+
+        if (log_handle == INVALID_HANDLE_VALUE)
+        {
+            msg(M_WARN|M_ERRNO, "Warning: cannot open --log file: %s", file);
+            return;
+        }
+
+        /* append to logfile? */
+        if (append)
+        {
+            if (SetFilePointer(log_handle, 0, NULL, FILE_END) == INVALID_SET_FILE_POINTER)
+            {
+                msg(M_ERR, "Error: cannot seek to end of --log file: %s", file);
+            }
+        }
+
+        /* save original stderr for password prompts */
+        orig_stderr = GetStdHandle(STD_ERROR_HANDLE);
 
 #if 0 /* seems not be necessary with stdout/stderr redirection below*/
-      /* set up for redirection */
-      if (!SetStdHandle (STD_OUTPUT_HANDLE, log_handle)
-	  || !SetStdHandle (STD_ERROR_HANDLE, log_handle))
-	msg (M_ERR, "Error: cannot redirect stdout/stderr to --log file: %s", file);
+        /* set up for redirection */
+        if (!SetStdHandle(STD_OUTPUT_HANDLE, log_handle)
+            || !SetStdHandle(STD_ERROR_HANDLE, log_handle))
+        {
+            msg(M_ERR, "Error: cannot redirect stdout/stderr to --log file: %s", file);
+        }
 #endif
 
-      /* direct stdout/stderr to point to log_handle */
-      log_fd = _open_osfhandle ((intptr_t)log_handle, _O_TEXT);
-      if (log_fd == -1)
-	msg (M_ERR, "Error: --log redirect failed due to _open_osfhandle failure");
-      
-      /* open log_handle as FILE stream */
-      ASSERT (msgfp == NULL);
-      msgfp = _fdopen (log_fd, "wt");
-      if (msgfp == NULL)
-	msg (M_ERR, "Error: --log redirect failed due to _fdopen");
-
-      /* redirect C-library stdout/stderr to log file */
-      if (_dup2 (log_fd, 1) == -1 || _dup2 (log_fd, 2) == -1)
-	msg (M_WARN, "Error: --log redirect of stdout/stderr failed");
-
-      std_redir = true;
+        /* direct stdout/stderr to point to log_handle */
+        log_fd = _open_osfhandle((intptr_t)log_handle, _O_TEXT);
+        if (log_fd == -1)
+        {
+            msg(M_ERR, "Error: --log redirect failed due to _open_osfhandle failure");
+        }
+
+        /* open log_handle as FILE stream */
+        ASSERT(msgfp == NULL);
+        msgfp = _fdopen(log_fd, "wt");
+        if (msgfp == NULL)
+        {
+            msg(M_ERR, "Error: --log redirect failed due to _fdopen");
+        }
+
+        /* redirect C-library stdout/stderr to log file */
+        if (_dup2(log_fd, 1) == -1 || _dup2(log_fd, 2) == -1)
+        {
+            msg(M_WARN, "Error: --log redirect of stdout/stderr failed");
+        }
+
+        std_redir = true;
     }
 #elif defined(HAVE_DUP2)
-  if (!std_redir)
+    if (!std_redir)
     {
-      int out = open (file,
-		      O_CREAT | O_WRONLY | (append ? O_APPEND : O_TRUNC),
-		      S_IRUSR | S_IWUSR);
-
-      if (out < 0)
-	{
-	  msg (M_WARN|M_ERRNO, "Warning: Error redirecting stdout/stderr to --log file: %s", file);
-	  return;
-	}
-
-      if (dup2 (out, 1) == -1)
-	msg (M_ERR, "--log file redirection error on stdout");
-      if (dup2 (out, 2) == -1)
-	msg (M_ERR, "--log file redirection error on stderr");
-
-      if (out > 2)
-	close (out);
-
-      std_redir = true;
+        int out = open(file,
+                       O_CREAT | O_WRONLY | (append ? O_APPEND : O_TRUNC),
+                       S_IRUSR | S_IWUSR);
+
+        if (out < 0)
+        {
+            msg(M_WARN|M_ERRNO, "Warning: Error redirecting stdout/stderr to --log file: %s", file);
+            return;
+        }
+
+        if (dup2(out, 1) == -1)
+        {
+            msg(M_ERR, "--log file redirection error on stdout");
+        }
+        if (dup2(out, 2) == -1)
+        {
+            msg(M_ERR, "--log file redirection error on stderr");
+        }
+
+        if (out > 2)
+        {
+            close(out);
+        }
+
+        std_redir = true;
     }
 
-#else
-  msg (M_WARN, "WARNING: The --log option is not supported on this OS because it lacks the dup2 function");
-#endif
+#else  /* if defined(_WIN32) */
+    msg(M_WARN, "WARNING: The --log option is not supported on this OS because it lacks the dup2 function");
+#endif /* if defined(_WIN32) */
 }
 
 /*
@@ -572,17 +636,17 @@ unsigned int x_cs_verbose_level; /* GLOBAL */
 unsigned int x_cs_err_delay_ms;  /* GLOBAL */
 
 void
-reset_check_status ()
+reset_check_status()
 {
-  x_cs_info_level = 0;
-  x_cs_verbose_level = 0;
+    x_cs_info_level = 0;
+    x_cs_verbose_level = 0;
 }
 
 void
-set_check_status (unsigned int info_level, unsigned int verbose_level)
+set_check_status(unsigned int info_level, unsigned int verbose_level)
 {
-  x_cs_info_level = info_level;
-  x_cs_verbose_level = verbose_level;
+    x_cs_info_level = info_level;
+    x_cs_verbose_level = verbose_level;
 }
 
 /*
@@ -594,58 +658,64 @@ set_check_status (unsigned int info_level, unsigned int verbose_level)
  * from the OS.
  */
 void
-x_check_status (int status,
-		const char *description,
-		struct link_socket *sock,
-		struct tuntap *tt)
+x_check_status(int status,
+               const char *description,
+               struct link_socket *sock,
+               struct tuntap *tt)
 {
-  const int my_errno = openvpn_errno ();
-  const char *extended_msg = NULL;
+    const int my_errno = openvpn_errno();
+    const char *extended_msg = NULL;
 
-  msg (x_cs_verbose_level, "%s %s returned %d",
-       sock ? proto2ascii (sock->info.proto, sock->info.af, true) : "",
-       description,
-       status);
+    msg(x_cs_verbose_level, "%s %s returned %d",
+        sock ? proto2ascii(sock->info.proto, sock->info.af, true) : "",
+        description,
+        status);
 
-  if (status < 0)
+    if (status < 0)
     {
-      struct gc_arena gc = gc_new ();
+        struct gc_arena gc = gc_new();
 #if EXTENDED_SOCKET_ERROR_CAPABILITY
-      /* get extended socket error message and possible PMTU hint from OS */
-      if (sock)
-	{
-	  int mtu;
-	  extended_msg = format_extended_socket_error (sock->sd, &mtu, &gc);
-	  if (mtu > 0 && sock->mtu != mtu)
-	    {
-	      sock->mtu = mtu;
-	      sock->info.mtu_changed = true;
-	    }
-	}
+        /* get extended socket error message and possible PMTU hint from OS */
+        if (sock)
+        {
+            int mtu;
+            extended_msg = format_extended_socket_error(sock->sd, &mtu, &gc);
+            if (mtu > 0 && sock->mtu != mtu)
+            {
+                sock->mtu = mtu;
+                sock->info.mtu_changed = true;
+            }
+        }
 #elif defined(_WIN32)
-      /* get possible driver error from TAP-Windows driver */
-      extended_msg = tap_win_getinfo (tt, &gc);
+        /* get possible driver error from TAP-Windows driver */
+        extended_msg = tap_win_getinfo(tt, &gc);
 #endif
-      if (!ignore_sys_error (my_errno))
-	{
-	  if (extended_msg)
-	    msg (x_cs_info_level, "%s %s [%s]: %s (code=%d)",
-		 description,
-		 sock ? proto2ascii (sock->info.proto, sock->info.af, true) : "",
-		 extended_msg,
-		 strerror_ts (my_errno, &gc),
-		 my_errno);
-	  else
-	    msg (x_cs_info_level, "%s %s: %s (code=%d)",
-		 description,
-		 sock ? proto2ascii (sock->info.proto, sock->info.af, true) : "",
-		 strerror_ts (my_errno, &gc),
-		 my_errno);
-
-	  if (x_cs_err_delay_ms)
-	    platform_sleep_milliseconds (x_cs_err_delay_ms);
-	}
-      gc_free (&gc);
+        if (!ignore_sys_error(my_errno))
+        {
+            if (extended_msg)
+            {
+                msg(x_cs_info_level, "%s %s [%s]: %s (code=%d)",
+                    description,
+                    sock ? proto2ascii(sock->info.proto, sock->info.af, true) : "",
+                    extended_msg,
+                    strerror_ts(my_errno, &gc),
+                    my_errno);
+            }
+            else
+            {
+                msg(x_cs_info_level, "%s %s: %s (code=%d)",
+                    description,
+                    sock ? proto2ascii(sock->info.proto, sock->info.af, true) : "",
+                    strerror_ts(my_errno, &gc),
+                    my_errno);
+            }
+
+            if (x_cs_err_delay_ms)
+            {
+                platform_sleep_milliseconds(x_cs_err_delay_ms);
+            }
+        }
+        gc_free(&gc);
     }
 }
 
@@ -666,222 +736,288 @@ const struct virtual_output *x_msg_virtual_output; /* GLOBAL */
  */
 
 void
-openvpn_exit (const int status)
+openvpn_exit(const int status)
 {
-  if (!forked)
+    if (!forked)
     {
-      void tun_abort();
+        void tun_abort();
+
 #ifdef ENABLE_PLUGIN
-      void plugin_abort (void);
+        void plugin_abort(void);
+
 #endif
 
-      tun_abort();
+        tun_abort();
 
 #ifdef _WIN32
-      uninit_win32 ();
+        uninit_win32();
 #endif
 
-      close_syslog ();
+        close_syslog();
 
 #ifdef ENABLE_PLUGIN
-      plugin_abort ();
+        plugin_abort();
 #endif
 
 #if PORT_SHARE
-      if (port_share)
-	port_share_abort (port_share);
+        if (port_share)
+        {
+            port_share_abort(port_share);
+        }
 #endif
 
 #ifdef ENABLE_MEMSTATS
-      mstats_close();
+        mstats_close();
 #endif
 
 #ifdef ABORT_ON_ERROR
-      if (status == OPENVPN_EXIT_STATUS_ERROR)
-	abort ();
+        if (status == OPENVPN_EXIT_STATUS_ERROR)
+        {
+            abort();
+        }
 #endif
 
-      if (status == OPENVPN_EXIT_STATUS_GOOD)
-	perf_output_results ();
+        if (status == OPENVPN_EXIT_STATUS_GOOD)
+        {
+            perf_output_results();
+        }
     }
 
-  exit (status);
+    exit(status);
 }
 
 /*
  * Translate msg flags into a string
  */
 const char *
-msg_flags_string (const unsigned int flags, struct gc_arena *gc)
+msg_flags_string(const unsigned int flags, struct gc_arena *gc)
 {
-  struct buffer out = alloc_buf_gc (16, gc);
-  if (flags == M_INFO)
-    buf_printf (&out, "I");
-  if (flags & M_FATAL)
-    buf_printf (&out, "F");
-  if (flags & M_NONFATAL)
-    buf_printf (&out, "N");
-  if (flags & M_WARN)
-    buf_printf (&out, "W");
-  if (flags & M_DEBUG)
-    buf_printf (&out, "D");
-  return BSTR (&out);
+    struct buffer out = alloc_buf_gc(16, gc);
+    if (flags == M_INFO)
+    {
+        buf_printf(&out, "I");
+    }
+    if (flags & M_FATAL)
+    {
+        buf_printf(&out, "F");
+    }
+    if (flags & M_NONFATAL)
+    {
+        buf_printf(&out, "N");
+    }
+    if (flags & M_WARN)
+    {
+        buf_printf(&out, "W");
+    }
+    if (flags & M_DEBUG)
+    {
+        buf_printf(&out, "D");
+    }
+    return BSTR(&out);
 }
 
 #ifdef ENABLE_DEBUG
 void
-crash (void)
+crash(void)
 {
-  char *null = NULL;
-  *null = 0;
+    char *null = NULL;
+    *null = 0;
 }
 #endif
 
 #ifdef _WIN32
 
 const char *
-strerror_win32 (DWORD errnum, struct gc_arena *gc)
+strerror_win32(DWORD errnum, struct gc_arena *gc)
 {
-  /*
-   * This code can be omitted, though often the Windows
-   * WSA error messages are less informative than the
-   * Posix equivalents.
-   */
-#if 1
-  switch (errnum) {
     /*
-     * When the TAP-Windows driver returns STATUS_UNSUCCESSFUL, this code
-     * gets returned to user space.
+     * This code can be omitted, though often the Windows
+     * WSA error messages are less informative than the
+     * Posix equivalents.
      */
-  case ERROR_GEN_FAILURE:
-    return "General failure (ERROR_GEN_FAILURE)";
-  case ERROR_IO_PENDING:
-    return "I/O Operation in progress (ERROR_IO_PENDING)";
-  case WSA_IO_INCOMPLETE:
-    return "I/O Operation in progress (WSA_IO_INCOMPLETE)";
-  case WSAEINTR:
-    return "Interrupted system call (WSAEINTR)";
-  case WSAEBADF:
-    return "Bad file number (WSAEBADF)";
-  case WSAEACCES:
-    return "Permission denied (WSAEACCES)";
-  case WSAEFAULT:
-    return "Bad address (WSAEFAULT)";
-  case WSAEINVAL:
-    return "Invalid argument (WSAEINVAL)";
-  case WSAEMFILE:
-    return "Too many open files (WSAEMFILE)";
-  case WSAEWOULDBLOCK:
-    return "Operation would block (WSAEWOULDBLOCK)";
-  case WSAEINPROGRESS:
-    return "Operation now in progress (WSAEINPROGRESS)";
-  case WSAEALREADY:
-    return "Operation already in progress (WSAEALREADY)";
-  case WSAEDESTADDRREQ:
-    return "Destination address required (WSAEDESTADDRREQ)";
-  case WSAEMSGSIZE:
-    return "Message too long (WSAEMSGSIZE)";
-  case WSAEPROTOTYPE:
-    return "Protocol wrong type for socket (WSAEPROTOTYPE)";
-  case WSAENOPROTOOPT:
-    return "Bad protocol option (WSAENOPROTOOPT)";
-  case WSAEPROTONOSUPPORT:
-    return "Protocol not supported (WSAEPROTONOSUPPORT)";
-  case WSAESOCKTNOSUPPORT:
-    return "Socket type not supported (WSAESOCKTNOSUPPORT)";
-  case WSAEOPNOTSUPP:
-    return "Operation not supported on socket (WSAEOPNOTSUPP)";
-  case WSAEPFNOSUPPORT:
-    return "Protocol family not supported (WSAEPFNOSUPPORT)";
-  case WSAEAFNOSUPPORT:
-    return "Address family not supported by protocol family (WSAEAFNOSUPPORT)";
-  case WSAEADDRINUSE:
-    return "Address already in use (WSAEADDRINUSE)";
-  case WSAENETDOWN:
-    return "Network is down (WSAENETDOWN)";
-  case WSAENETUNREACH:
-    return "Network is unreachable (WSAENETUNREACH)";
-  case WSAENETRESET:
-    return "Net dropped connection or reset (WSAENETRESET)";
-  case WSAECONNABORTED:
-    return "Software caused connection abort (WSAECONNABORTED)";
-  case WSAECONNRESET:
-    return "Connection reset by peer (WSAECONNRESET)";
-  case WSAENOBUFS:
-    return "No buffer space available (WSAENOBUFS)";
-  case WSAEISCONN:
-    return "Socket is already connected (WSAEISCONN)";
-  case WSAENOTCONN:
-    return "Socket is not connected (WSAENOTCONN)";
-  case WSAETIMEDOUT:
-    return "Connection timed out (WSAETIMEDOUT)";
-  case WSAECONNREFUSED:
-    return "Connection refused (WSAECONNREFUSED)";
-  case WSAELOOP:
-    return "Too many levels of symbolic links (WSAELOOP)";
-  case WSAENAMETOOLONG:
-    return "File name too long (WSAENAMETOOLONG)";
-  case WSAEHOSTDOWN:
-    return "Host is down (WSAEHOSTDOWN)";
-  case WSAEHOSTUNREACH:
-    return "No Route to Host (WSAEHOSTUNREACH)";
-  case WSAENOTEMPTY:
-    return "Directory not empty (WSAENOTEMPTY)";
-  case WSAEPROCLIM:
-    return "Too many processes (WSAEPROCLIM)";
-  case WSAEUSERS:
-    return "Too many users (WSAEUSERS)";
-  case WSAEDQUOT:
-    return "Disc Quota Exceeded (WSAEDQUOT)";
-  case WSAESTALE:
-    return "Stale NFS file handle (WSAESTALE)";
-  case WSASYSNOTREADY:
-    return "Network SubSystem is unavailable (WSASYSNOTREADY)";
-  case WSAVERNOTSUPPORTED:
-    return "WINSOCK DLL Version out of range (WSAVERNOTSUPPORTED)";
-  case WSANOTINITIALISED:
-    return "Successful WSASTARTUP not yet performed (WSANOTINITIALISED)";
-  case WSAEREMOTE:
-    return "Too many levels of remote in path (WSAEREMOTE)";
-  case WSAHOST_NOT_FOUND:
-    return "Host not found (WSAHOST_NOT_FOUND)";
-  default:
-    break;
-  }
-#endif
+#if 1
+    switch (errnum) {
+        /*
+         * When the TAP-Windows driver returns STATUS_UNSUCCESSFUL, this code
+         * gets returned to user space.
+         */
+        case ERROR_GEN_FAILURE:
+            return "General failure (ERROR_GEN_FAILURE)";
 
-  /* format a windows error message */
-  {
-    char message[256];
-    struct buffer out = alloc_buf_gc (256, gc);
-    const int status =  FormatMessage (
-				       FORMAT_MESSAGE_IGNORE_INSERTS
-				       | FORMAT_MESSAGE_FROM_SYSTEM
-				       | FORMAT_MESSAGE_ARGUMENT_ARRAY,
-				       NULL,
-				       errnum,
-				       0,
-				       message,
-				       sizeof (message),
-				       NULL);
-    if (!status)
-      {
-	buf_printf (&out, "[Unknown Win32 Error]");
-      }
-    else
-      {
-	char *cp;
-	for (cp = message; *cp != '\0'; ++cp)
-	  {
-	    if (*cp == '\n' || *cp == '\r')
-	      *cp = ' ';
-	  }
-	
-	buf_printf(&out, "%s", message);
-      }
-    
-    return BSTR (&out);
-  }
+        case ERROR_IO_PENDING:
+            return "I/O Operation in progress (ERROR_IO_PENDING)";
+
+        case WSA_IO_INCOMPLETE:
+            return "I/O Operation in progress (WSA_IO_INCOMPLETE)";
+
+        case WSAEINTR:
+            return "Interrupted system call (WSAEINTR)";
+
+        case WSAEBADF:
+            return "Bad file number (WSAEBADF)";
+
+        case WSAEACCES:
+            return "Permission denied (WSAEACCES)";
+
+        case WSAEFAULT:
+            return "Bad address (WSAEFAULT)";
+
+        case WSAEINVAL:
+            return "Invalid argument (WSAEINVAL)";
+
+        case WSAEMFILE:
+            return "Too many open files (WSAEMFILE)";
+
+        case WSAEWOULDBLOCK:
+            return "Operation would block (WSAEWOULDBLOCK)";
+
+        case WSAEINPROGRESS:
+            return "Operation now in progress (WSAEINPROGRESS)";
+
+        case WSAEALREADY:
+            return "Operation already in progress (WSAEALREADY)";
+
+        case WSAEDESTADDRREQ:
+            return "Destination address required (WSAEDESTADDRREQ)";
+
+        case WSAEMSGSIZE:
+            return "Message too long (WSAEMSGSIZE)";
+
+        case WSAEPROTOTYPE:
+            return "Protocol wrong type for socket (WSAEPROTOTYPE)";
+
+        case WSAENOPROTOOPT:
+            return "Bad protocol option (WSAENOPROTOOPT)";
+
+        case WSAEPROTONOSUPPORT:
+            return "Protocol not supported (WSAEPROTONOSUPPORT)";
+
+        case WSAESOCKTNOSUPPORT:
+            return "Socket type not supported (WSAESOCKTNOSUPPORT)";
+
+        case WSAEOPNOTSUPP:
+            return "Operation not supported on socket (WSAEOPNOTSUPP)";
+
+        case WSAEPFNOSUPPORT:
+            return "Protocol family not supported (WSAEPFNOSUPPORT)";
+
+        case WSAEAFNOSUPPORT:
+            return "Address family not supported by protocol family (WSAEAFNOSUPPORT)";
+
+        case WSAEADDRINUSE:
+            return "Address already in use (WSAEADDRINUSE)";
+
+        case WSAENETDOWN:
+            return "Network is down (WSAENETDOWN)";
+
+        case WSAENETUNREACH:
+            return "Network is unreachable (WSAENETUNREACH)";
+
+        case WSAENETRESET:
+            return "Net dropped connection or reset (WSAENETRESET)";
+
+        case WSAECONNABORTED:
+            return "Software caused connection abort (WSAECONNABORTED)";
+
+        case WSAECONNRESET:
+            return "Connection reset by peer (WSAECONNRESET)";
+
+        case WSAENOBUFS:
+            return "No buffer space available (WSAENOBUFS)";
+
+        case WSAEISCONN:
+            return "Socket is already connected (WSAEISCONN)";
+
+        case WSAENOTCONN:
+            return "Socket is not connected (WSAENOTCONN)";
+
+        case WSAETIMEDOUT:
+            return "Connection timed out (WSAETIMEDOUT)";
+
+        case WSAECONNREFUSED:
+            return "Connection refused (WSAECONNREFUSED)";
+
+        case WSAELOOP:
+            return "Too many levels of symbolic links (WSAELOOP)";
+
+        case WSAENAMETOOLONG:
+            return "File name too long (WSAENAMETOOLONG)";
+
+        case WSAEHOSTDOWN:
+            return "Host is down (WSAEHOSTDOWN)";
+
+        case WSAEHOSTUNREACH:
+            return "No Route to Host (WSAEHOSTUNREACH)";
+
+        case WSAENOTEMPTY:
+            return "Directory not empty (WSAENOTEMPTY)";
+
+        case WSAEPROCLIM:
+            return "Too many processes (WSAEPROCLIM)";
+
+        case WSAEUSERS:
+            return "Too many users (WSAEUSERS)";
+
+        case WSAEDQUOT:
+            return "Disc Quota Exceeded (WSAEDQUOT)";
+
+        case WSAESTALE:
+            return "Stale NFS file handle (WSAESTALE)";
+
+        case WSASYSNOTREADY:
+            return "Network SubSystem is unavailable (WSASYSNOTREADY)";
+
+        case WSAVERNOTSUPPORTED:
+            return "WINSOCK DLL Version out of range (WSAVERNOTSUPPORTED)";
+
+        case WSANOTINITIALISED:
+            return "Successful WSASTARTUP not yet performed (WSANOTINITIALISED)";
+
+        case WSAEREMOTE:
+            return "Too many levels of remote in path (WSAEREMOTE)";
+
+        case WSAHOST_NOT_FOUND:
+            return "Host not found (WSAHOST_NOT_FOUND)";
+
+        default:
+            break;
+    }
+#endif /* if 1 */
+
+    /* format a windows error message */
+    {
+        char message[256];
+        struct buffer out = alloc_buf_gc(256, gc);
+        const int status =  FormatMessage(
+            FORMAT_MESSAGE_IGNORE_INSERTS
+            | FORMAT_MESSAGE_FROM_SYSTEM
+            | FORMAT_MESSAGE_ARGUMENT_ARRAY,
+            NULL,
+            errnum,
+            0,
+            message,
+            sizeof(message),
+            NULL);
+        if (!status)
+        {
+            buf_printf(&out, "[Unknown Win32 Error]");
+        }
+        else
+        {
+            char *cp;
+            for (cp = message; *cp != '\0'; ++cp)
+            {
+                if (*cp == '\n' || *cp == '\r')
+                {
+                    *cp = ' ';
+                }
+            }
+
+            buf_printf(&out, "%s", message);
+        }
+
+        return BSTR(&out);
+    }
 }
 
-#endif
+#endif /* ifdef _WIN32 */