Merge tag 'upstream/2.3_rc1'

Upstream version 2.3_rc1

1 files changed, 0 insertions, 553 deletions

diff --git a/plugin/down-root/down-root.c b/plugin/down-root/down-root.c
deleted file mode 100644
index fced23b..0000000
--- a/plugin/down-root/down-root.c
+++ /dev/null
@@ -1,553 +0,0 @@
-/*
- *  OpenVPN -- An application to securely tunnel IP networks
- *             over a single TCP/UDP port, with support for SSL/TLS-based
- *             session authentication and key exchange,
- *             packet encryption, packet authentication, and
- *             packet compression.
- *
- *  Copyright (C) 2002-2010 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
- *  as published by the Free Software Foundation.
- *
- *  This program 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 this program (see the file COPYING included with this
- *  distribution); if not, write to the Free Software Foundation, Inc.,
- *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-/*
- * OpenVPN plugin module to do privileged down-script execution.
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/wait.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <syslog.h>
-
-#include "openvpn-plugin.h"
-
-#define DEBUG(verb) ((verb) >= 7)
-
-/* Command codes for foreground -> background communication */
-#define COMMAND_RUN_SCRIPT 0
-#define COMMAND_EXIT       1
-
-/* Response codes for background -> foreground communication */
-#define RESPONSE_INIT_SUCCEEDED   10
-#define RESPONSE_INIT_FAILED      11
-#define RESPONSE_SCRIPT_SUCCEEDED 12
-#define RESPONSE_SCRIPT_FAILED    13
-
-/* Background process function */
-static void down_root_server (const int fd, char *command, const char *argv[], const char *envp[], const int verb);
-
-/*
- * Plugin state, used by foreground
- */
-struct down_root_context
-{
-  /* Foreground's socket to background process */
-  int foreground_fd;
-
-  /* Process ID of background process */
-  pid_t background_pid;
-
-  /* Verbosity level of OpenVPN */
-  int verb;
-
-  /* down command */
-  char *command;
-};
-
-/*
- * Given an environmental variable name, search
- * the envp array for its value, returning it
- * if found or NULL otherwise.
- */
-static const char *
-get_env (const char *name, const char *envp[])
-{
-  if (envp)
-    {
-      int i;
-      const int namelen = strlen (name);
-      for (i = 0; envp[i]; ++i)
-	{
-	  if (!strncmp (envp[i], name, namelen))
-	    {
-	      const char *cp = envp[i] + namelen;
-	      if (*cp == '=')
-		return cp + 1;
-	    }
-	}
-    }
-  return NULL;
-}
-
-/*
- * Return the length of a string array
- */
-static int
-string_array_len (const char *array[])
-{
-  int i = 0;
-  if (array)
-    {
-      while (array[i])
-	++i;
-    }
-  return i;
-}
-
-/*
- * Socket read/write functions.
- */
-
-static int
-recv_control (int fd)
-{
-  unsigned char c;
-  const ssize_t size = read (fd, &c, sizeof (c));
-  if (size == sizeof (c))
-    return c;
-  else
-    return -1;
-}
-
-static int
-send_control (int fd, int code)
-{
-  unsigned char c = (unsigned char) code;
-  const ssize_t size = write (fd, &c, sizeof (c));
-  if (size == sizeof (c))
-    return (int) size;
-  else
-    return -1;
-}
-
-/*
- * Daemonize if "daemon" env var is true.
- * Preserve stderr across daemonization if
- * "daemon_log_redirect" env var is true.
- */
-static void
-daemonize (const char *envp[])
-{
-  const char *daemon_string = get_env ("daemon", envp);
-  if (daemon_string && daemon_string[0] == '1')
-    {
-      const char *log_redirect = get_env ("daemon_log_redirect", envp);
-      int fd = -1;
-      if (log_redirect && log_redirect[0] == '1')
-	fd = dup (2);
-      if (daemon (0, 0) < 0)
-	{
-	  fprintf (stderr, "DOWN-ROOT: daemonization failed\n");
-	}
-      else if (fd >= 3)
-	{
-	  dup2 (fd, 2);
-	  close (fd);
-	}
-    }
-}
-
-/*
- * Close most of parent's fds.
- * Keep stdin/stdout/stderr, plus one
- * other fd which is presumed to be
- * our pipe back to parent.
- * Admittedly, a bit of a kludge,
- * but posix doesn't give us a kind
- * of FD_CLOEXEC which will stop
- * fds from crossing a fork().
- */
-static void
-close_fds_except (int keep)
-{
-  int i;
-  closelog ();
-  for (i = 3; i <= 100; ++i)
-    {
-      if (i != keep)
-	close (i);
-    }
-}
-
-/*
- * Usually we ignore signals, because our parent will
- * deal with them.
- */
-static void
-set_signals (void)
-{
-  signal (SIGTERM, SIG_DFL);
-
-  signal (SIGINT, SIG_IGN);
-  signal (SIGHUP, SIG_IGN);
-  signal (SIGUSR1, SIG_IGN);
-  signal (SIGUSR2, SIG_IGN);
-  signal (SIGPIPE, SIG_IGN);
-}
-
-/*
- * convert system() return into a success/failure value
- */
-int
-system_ok (int stat)
-{
-#ifdef WIN32
-  return stat == 0;
-#else
-  return stat != -1 && WIFEXITED (stat) && WEXITSTATUS (stat) == 0;
-#endif
-}
-
-static char *
-build_command_line (const char *argv[])
-{
-  int size = 0;
-  int n = 0;
-  int i;
-  char *string;
-
-  /* precompute size */
-  if (argv)
-    {
-      for (i = 0; argv[i]; ++i)
-	{
-	  size += (strlen (argv[i]) + 1); /* string length plus trailing space */
-	  ++n;
-	}
-    }
-  ++size;                                 /* for null terminator */
-
-  /* allocate memory */
-  string = (char *) malloc (size);
-  if (!string)
-    {
-      fprintf (stderr, "DOWN-ROOT: out of memory\n");
-      exit (1);
-    }
-  string[0] = '\0';
-
-  /* build string */
-  for (i = 0; i < n; ++i)
-    {
-      strcat (string, argv[i]);
-      if (i + 1 < n)
-	strcat (string, " ");
-    }
-  return string;
-}
-
-static void
-free_context (struct down_root_context *context)
-{
-  if (context)
-    {
-      if (context->command)
-	free (context->command);
-      free (context);
-    }
-}
-
-OPENVPN_EXPORT openvpn_plugin_handle_t
-openvpn_plugin_open_v1 (unsigned int *type_mask, const char *argv[], const char *envp[])
-{
-  struct down_root_context *context;
-
-  /*
-   * Allocate our context
-   */
-  context = (struct down_root_context *) calloc (1, sizeof (struct down_root_context));
-  if (!context)
-    goto error;
-  context->foreground_fd = -1;
-
-  /*
-   * Intercept the --up and --down callbacks
-   */
-  *type_mask = OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_UP) | OPENVPN_PLUGIN_MASK (OPENVPN_PLUGIN_DOWN);
-
-  /*
-   * Make sure we have two string arguments: the first is the .so name,
-   * the second is the script command.
-   */
-  if (string_array_len (argv) < 2)
-    {
-      fprintf (stderr, "DOWN-ROOT: need down script command\n");
-      goto error;
-    }
-
-  /*
-   * Save our argument in context
-   */
-  context->command = build_command_line (&argv[1]);
-
-  /*
-   * Get verbosity level from environment
-   */
-  {
-    const char *verb_string = get_env ("verb", envp);
-    if (verb_string)
-      context->verb = atoi (verb_string);
-  }
-
-  return (openvpn_plugin_handle_t) context;
-
- error:
-  free_context (context);
-  return NULL;
-}
-
-OPENVPN_EXPORT int
-openvpn_plugin_func_v1 (openvpn_plugin_handle_t handle, const int type, const char *argv[], const char *envp[])
-{
-  struct down_root_context *context = (struct down_root_context *) handle;
-
-  if (type == OPENVPN_PLUGIN_UP && context->foreground_fd == -1) /* fork off a process to hold onto root */
-    {
-      pid_t pid;
-      int fd[2];
-
-      /*
-       * Make a socket for foreground and background processes
-       * to communicate.
-       */
-      if (socketpair (PF_UNIX, SOCK_DGRAM, 0, fd) == -1)
-	{
-	  fprintf (stderr, "DOWN-ROOT: socketpair call failed\n");
-	  return OPENVPN_PLUGIN_FUNC_ERROR;
-	}
-
-      /*
-       * Fork off the privileged process.  It will remain privileged
-       * even after the foreground process drops its privileges.
-       */
-      pid = fork ();
-
-      if (pid)
-	{
-	  int status;
-
-	  /*
-	   * Foreground Process
-	   */
-
-	  context->background_pid = pid;
-
-	  /* close our copy of child's socket */
-	  close (fd[1]);
-
-	  /* don't let future subprocesses inherit child socket */
-	  if (fcntl (fd[0], F_SETFD, FD_CLOEXEC) < 0)
-	    fprintf (stderr, "DOWN-ROOT: Set FD_CLOEXEC flag on socket file descriptor failed\n");
-
-	  /* wait for background child process to initialize */
-	  status = recv_control (fd[0]);
-	  if (status == RESPONSE_INIT_SUCCEEDED)
-	    {
-	      context->foreground_fd = fd[0];
-	      return OPENVPN_PLUGIN_FUNC_SUCCESS;
-	    }
-	}
-      else
-	{
-	  /*
-	   * Background Process
-	   */
-
-	  /* close all parent fds except our socket back to parent */
-	  close_fds_except (fd[1]);
-
-	  /* Ignore most signals (the parent will receive them) */
-	  set_signals ();
-
-	  /* Daemonize if --daemon option is set. */
-	  daemonize (envp);
-
-	  /* execute the event loop */
-	  down_root_server (fd[1], context->command, argv, envp, context->verb);
-
-	  close (fd[1]);
-	  exit (0);
-	  return 0; /* NOTREACHED */
-	}
-    }
-  else if (type == OPENVPN_PLUGIN_DOWN && context->foreground_fd >= 0)
-    {
-      if (send_control (context->foreground_fd, COMMAND_RUN_SCRIPT) == -1)
-	{
-	  fprintf (stderr, "DOWN-ROOT: Error sending script execution signal to background process\n");
-	}
-      else
-	{
-	  const int status = recv_control (context->foreground_fd);
-	  if (status == RESPONSE_SCRIPT_SUCCEEDED)
-	    return OPENVPN_PLUGIN_FUNC_SUCCESS;
-	  if (status == -1)
-	    fprintf (stderr, "DOWN-ROOT: Error receiving script execution confirmation from background process\n");
-	}
-    }
-  return OPENVPN_PLUGIN_FUNC_ERROR;
-}
-
-OPENVPN_EXPORT void
-openvpn_plugin_close_v1 (openvpn_plugin_handle_t handle)
-{
-  struct down_root_context *context = (struct down_root_context *) handle;
-
-  if (DEBUG (context->verb))
-    fprintf (stderr, "DOWN-ROOT: close\n");
-
-  if (context->foreground_fd >= 0)
-    {
-      /* tell background process to exit */
-      if (send_control (context->foreground_fd, COMMAND_EXIT) == -1)
-	fprintf (stderr, "DOWN-ROOT: Error signaling background process to exit\n");
-
-      /* wait for background process to exit */
-      if (context->background_pid > 0)
-	waitpid (context->background_pid, NULL, 0);
-
-      close (context->foreground_fd);
-      context->foreground_fd = -1;
-    }
-
-  free_context (context);
-}
-
-OPENVPN_EXPORT void
-openvpn_plugin_abort_v1 (openvpn_plugin_handle_t handle)
-{
-  struct down_root_context *context = (struct down_root_context *) handle;
-
-  if (context && context->foreground_fd >= 0)
-    {
-      /* tell background process to exit */
-      send_control (context->foreground_fd, COMMAND_EXIT);
-      close (context->foreground_fd);
-      context->foreground_fd = -1;
-    }
-}
-
-/*
- * Background process -- runs with privilege.
- */
-static void
-down_root_server (const int fd, char *command, const char *argv[], const char *envp[], const int verb)
-{
-  const char *p[3];
-  char *command_line = NULL;
-  char *argv_cat = NULL;
-  int i;
-
-  /*
-   * Do initialization
-   */
-  if (DEBUG (verb))
-    fprintf (stderr, "DOWN-ROOT: BACKGROUND: INIT command='%s'\n", command);
-
-  /*
-   * Tell foreground that we initialized successfully
-   */
-  if (send_control (fd, RESPONSE_INIT_SUCCEEDED) == -1)
-    {
-      fprintf (stderr, "DOWN-ROOT: BACKGROUND: write error on response socket [1]\n");
-      goto done;
-    }
-
-  /*
-   * Build command line
-   */
-  if (string_array_len (argv) >= 2)
-    argv_cat = build_command_line (&argv[1]);
-  else
-    argv_cat = build_command_line (NULL);
-  p[0] = command;
-  p[1] = argv_cat;
-  p[2] = NULL;
-  command_line = build_command_line (p);
-
-  /*
-   * Save envp in environment
-   */
-  for (i = 0; envp[i]; ++i)
-    {
-      putenv ((char *)envp[i]);
-    }
-
-  /*
-   * Event loop
-   */
-  while (1)
-    {
-      int command_code;
-      int status;
-
-      /* get a command from foreground process */
-      command_code = recv_control (fd);
-
-      if (DEBUG (verb))
-	fprintf (stderr, "DOWN-ROOT: BACKGROUND: received command code: %d\n", command_code);
-
-      switch (command_code)
-	{
-	case COMMAND_RUN_SCRIPT:
-	  status = system (command_line);
-	  if (system_ok (status)) /* Succeeded */
-	    {
-	      if (send_control (fd, RESPONSE_SCRIPT_SUCCEEDED) == -1)
-		{
-		  fprintf (stderr, "DOWN-ROOT: BACKGROUND: write error on response socket [2]\n");
-		  goto done;
-		}
-	    }
-	  else /* Failed */
-	    {
-	      if (send_control (fd, RESPONSE_SCRIPT_FAILED) == -1)
-		{
-		  fprintf (stderr, "DOWN-ROOT: BACKGROUND: write error on response socket [3]\n");
-		  goto done;
-		}
-	    }
-	  break;
-
-	case COMMAND_EXIT:
-	  goto done;
-
-	case -1:
-	  fprintf (stderr, "DOWN-ROOT: BACKGROUND: read error on command channel\n");
-	  goto done;
-
-	default:
-	  fprintf (stderr, "DOWN-ROOT: BACKGROUND: unknown command code: code=%d, exiting\n",
-		   command_code);
-	  goto done;
-	}
-    }
-
- done:
-  if (argv_cat)
-    free (argv_cat);
-  if (command_line)
-    free (command_line);
-  if (DEBUG (verb))
-    fprintf (stderr, "DOWN-ROOT: BACKGROUND: EXIT\n");
-
-  return;
-}