build: standard directory layout

Suitable for mature project.

root   - administrative stuff
doc    - documents
src    - sources
tests  - tests
distro - distro specific files
sample - samples

SIDE EFFECT: many changes to rpm spec.

Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com>
Acked-by: Adriaan de Jong <dejong@fox-it.com>
Signed-off-by: David Sommerseth <davids@redhat.com>

1 files changed, 285 insertions, 0 deletions

diff --git a/src/openvpn/openvpn.c b/src/openvpn/openvpn.c
new file mode 100644
index 0000000..b2175a1
--- /dev/null
+++ b/src/openvpn/openvpn.c
@@ -0,0 +1,285 @@
+/*
+ *  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
+ */
+
+#include "syshead.h"
+
+#include "init.h"
+#include "forward.h"
+#include "multi.h"
+#include "win32.h"
+
+#include "memdbg.h"
+
+#include "forward-inline.h"
+
+#define P2P_CHECK_SIG() EVENT_LOOP_CHECK_SIGNAL (c, process_signal_p2p, c);
+
+static bool
+process_signal_p2p (struct context *c)
+{
+  remap_signal (c);
+  return process_signal (c);
+}
+
+
+
+/**************************************************************************/
+/**
+ * Main event loop for OpenVPN in client mode, where only one VPN tunnel
+ * is active.
+ * @ingroup eventloop
+ *
+ * @param c - The context structure of the single active VPN tunnel.
+ */
+static void
+tunnel_point_to_point (struct context *c)
+{
+  context_clear_2 (c);
+
+  /* set point-to-point mode */
+  c->mode = CM_P2P;
+
+  /* initialize tunnel instance */
+  init_instance_handle_signals (c, c->es, CC_HARD_USR1_TO_HUP);
+  if (IS_SIG (c))
+    return;
+
+  /* main event loop */
+  while (true)
+    {
+      perf_push (PERF_EVENT_LOOP);
+
+      /* process timers, TLS, etc. */
+      pre_select (c);
+      P2P_CHECK_SIG();
+
+      /* set up and do the I/O wait */
+      io_wait (c, p2p_iow_flags (c));
+      P2P_CHECK_SIG();
+
+      /* timeout? */
+      if (c->c2.event_set_status == ES_TIMEOUT)
+	{
+	  perf_pop ();
+	  continue;
+	}
+
+      /* process the I/O which triggered select */
+      process_io (c);
+      P2P_CHECK_SIG();
+
+      perf_pop ();
+    }
+
+  uninit_management_callback ();
+
+  /* tear down tunnel instance (unless --persist-tun) */
+  close_instance (c);
+}
+
+#undef PROCESS_SIGNAL_P2P
+
+
+/**************************************************************************/
+/**
+ * OpenVPN's main init-run-cleanup loop.
+ * @ingroup eventloop
+ *
+ * This function contains the two outer OpenVPN loops.  Its structure is
+ * as follows:
+ *  - Once-per-process initialization.
+ *  - Outer loop, run at startup and then once per \c SIGHUP:
+ *    - Level 1 initialization
+ *    - Inner loop, run at startup and then once per \c SIGUSR1:
+ *      - Call event loop function depending on client or server mode:
+ *        - \c tunnel_point_to_point()
+ *        - \c tunnel_server()
+ *    - Level 1 cleanup
+ *  - Once-per-process cleanup.
+ *
+ * @param argc - Commandline argument count.
+ * @param argv - Commandline argument values.
+ */
+int
+main (int argc, char *argv[])
+{
+  struct context c;
+
+#if PEDANTIC
+  fprintf (stderr, "Sorry, I was built with --enable-pedantic and I am incapable of doing any real work!\n");
+  return 1;
+#endif
+
+#ifdef WIN32
+  SetConsoleOutputCP (CP_UTF8);
+#endif
+
+  CLEAR (c);
+
+  /* signify first time for components which can
+     only be initialized once per program instantiation. */
+  c.first_time = true;
+
+  /* initialize program-wide statics */
+  if (init_static ())
+    {
+      /*
+       * This loop is initially executed on startup and then
+       * once per SIGHUP.
+       */
+      do
+	{
+	  /* enter pre-initialization mode with regard to signal handling */
+	  pre_init_signal_catch ();
+
+	  /* zero context struct but leave first_time member alone */
+	  context_clear_all_except_first_time (&c);
+
+	  /* static signal info object */
+	  CLEAR (siginfo_static);
+	  c.sig = &siginfo_static;
+
+	  /* initialize garbage collector scoped to context object */
+	  gc_init (&c.gc);
+
+	  /* initialize environmental variable store */
+	  c.es = env_set_create (&c.gc);
+#ifdef WIN32
+	  set_win_sys_path_via_env (c.es);
+#endif
+
+#ifdef ENABLE_MANAGEMENT
+	  /* initialize management subsystem */
+	  init_management (&c);
+#endif
+
+	  /* initialize options to default state */
+	  init_options (&c.options, true);
+
+	  /* parse command line options, and read configuration file */
+	  parse_argv (&c.options, argc, argv, M_USAGE, OPT_P_DEFAULT, NULL, c.es);
+
+#ifdef ENABLE_PLUGIN
+	  /* plugins may contribute options configuration */
+	  init_verb_mute (&c, IVM_LEVEL_1);
+	  init_plugins (&c);
+	  open_plugins (&c, true, OPENVPN_PLUGIN_INIT_PRE_CONFIG_PARSE);
+#endif
+
+	  /* init verbosity and mute levels */
+	  init_verb_mute (&c, IVM_LEVEL_1);
+
+	  /* set dev options */
+	  init_options_dev (&c.options);
+
+	  /* openssl print info? */
+	  if (print_openssl_info (&c.options))
+	    break;
+
+	  /* --genkey mode? */
+	  if (do_genkey (&c.options))
+	    break;
+
+	  /* tun/tap persist command? */
+	  if (do_persist_tuntap (&c.options))
+	    break;
+
+	  /* sanity check on options */
+	  options_postprocess (&c.options);
+
+	  /* show all option settings */
+	  show_settings (&c.options);
+
+	  /* print version number */
+	  msg (M_INFO, "%s", title_string);
+
+	  /* misc stuff */
+	  pre_setup (&c.options);
+
+	  /* test crypto? */
+	  if (do_test_crypto (&c.options))
+	    break;
+	  
+#ifdef ENABLE_MANAGEMENT
+	  /* open management subsystem */
+	  if (!open_management (&c))
+	    break;
+#endif
+
+	  /* set certain options as environmental variables */
+	  setenv_settings (c.es, &c.options);
+
+	  /* finish context init */
+	  context_init_1 (&c);
+
+	  do
+	    {
+	      /* run tunnel depending on mode */
+	      switch (c.options.mode)
+		{
+		case MODE_POINT_TO_POINT:
+		  tunnel_point_to_point (&c);
+		  break;
+#if P2MP_SERVER
+		case MODE_SERVER:
+		  tunnel_server (&c);
+		  break;
+#endif
+		default:
+		  ASSERT (0);
+		}
+
+	      /* indicates first iteration -- has program-wide scope */
+	      c.first_time = false;
+
+	      /* any signals received? */
+	      if (IS_SIG (&c))
+		print_signal (c.sig, NULL, M_INFO);
+
+	      /* pass restart status to management subsystem */
+	      signal_restart_status (c.sig);
+	    }
+	  while (c.sig->signal_received == SIGUSR1);
+
+	  uninit_options (&c.options);
+	  gc_reset (&c.gc);
+	}
+      while (c.sig->signal_received == SIGHUP);
+    }
+
+  context_gc_free (&c);
+
+  env_set_destroy (c.es);
+
+#ifdef ENABLE_MANAGEMENT
+  /* close management interface */
+  close_management ();
+#endif
+
+  /* uninitialize program-wide statics */
+  uninit_static ();
+
+  openvpn_exit (OPENVPN_EXIT_STATUS_GOOD);  /* exit point */
+  return 0;			            /* NOTREACHED */
+}