1 files changed, 174 insertions, 0 deletions

diff --git a/src/starter/invokecharon.c b/src/starter/invokecharon.c
new file mode 100644
index 000000000..a56a03ba8
--- /dev/null
+++ b/src/starter/invokecharon.c
@@ -0,0 +1,174 @@
+/* strongSwan charon launcher
+ * Copyright (C) 2001-2002 Mathieu Lafon - Arkoon Network Security
+ * Copyright (C) 2006 Martin Willi - Hochschule fuer Technik Rapperswil
+ *
+ * Ported from invokepluto.c to fit charons needs.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * 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.
+ *
+ * RCSID $Id: invokecharon.c $
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <signal.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <freeswan.h>
+
+#include "../pluto/constants.h"
+#include "../pluto/defs.h"
+#include "../pluto/log.h"
+
+#include "confread.h"
+#include "invokecharon.h"
+#include "files.h"
+
+static int _charon_pid = 0;
+static int _stop_requested;
+
+pid_t
+starter_charon_pid(void)
+{
+    return _charon_pid;
+}
+
+void
+starter_charon_sigchild(pid_t pid)
+{
+	if (pid == _charon_pid)
+    {
+		_charon_pid = 0;
+	if (!_stop_requested)
+	{
+	    plog("charon has died -- restart scheduled (%dsec)"
+		, CHARON_RESTART_DELAY);
+	    alarm(CHARON_RESTART_DELAY);   // restart in 5 sec
+	}
+	unlink(CHARON_PID_FILE);
+    }
+}
+
+int
+starter_stop_charon (void)
+{
+    pid_t pid;
+    int i;
+
+    pid = _charon_pid;
+    if (pid)
+    {
+	_stop_requested = 1;
+
+	/* be more and more aggressive */
+	for (i = 0; i < 20 && (pid = _charon_pid) != 0; i++)
+	{
+		if (i == 0)
+			kill(pid, SIGINT);
+	    else if (i < 10)
+			kill(pid, SIGTERM);
+	    else
+			kill(pid, SIGKILL);
+	    usleep(20000);
+	}
+	if (_charon_pid == 0)
+	    return 0;
+	plog("starter_stop_charon(): can't stop charon !!!");
+	return -1;
+    }
+    else
+    {
+	plog("stater_stop_charon(): charon is not started...");
+    }
+    return -1;
+}
+
+
+int
+starter_start_charon (starter_config_t *cfg, bool debug)
+{
+    int pid, i;
+    struct stat stb;
+    int argc = 1;
+    char *arg[] = {
+	CHARON_CMD, NULL, NULL,
+    };
+
+    if (!debug)
+    {
+	arg[argc++] = "--use-syslog";
+    }
+	
+    if (_charon_pid)
+    {
+	plog("starter_start_charon(): charon already started...");
+	return -1;
+    }
+    else
+    {
+	unlink(CHARON_CTL_FILE);
+	_stop_requested = 0;
+
+	pid = fork();
+	switch (pid)
+	{
+	case -1:
+	    plog("can't fork(): %s", strerror(errno));
+	    return -1;
+	case 0:
+	    /* child */
+	    setsid();
+	    sigprocmask(SIG_SETMASK, 0, NULL);
+	    execv(arg[0], arg);
+	    plog("can't execv(%s,...): %s", arg[0], strerror(errno));
+	    exit(1);
+	default:
+	    /* father */
+		_charon_pid = pid;
+		for (i = 0; i < 50 && _charon_pid; i++)
+	    {
+		/* wait for charon */
+		usleep(20000);
+		if (stat(CHARON_PID_FILE, &stb) == 0)
+		{
+		    DBG(DBG_CONTROL,
+			DBG_log("charon (%d) started", _charon_pid)
+		    )
+		    return 0;
+		}
+	    }
+	    if (_charon_pid)
+	    {
+		/* If charon is started but with no ctl file, stop it */
+		plog("charon too long to start... - kill kill");
+		for (i = 0; i < 20 && (pid = _charon_pid) != 0; i++)
+		{
+			if (i == 0)
+			kill(pid, SIGINT);
+		    else if (i < 10)
+			kill(pid, SIGTERM);
+		    else
+			kill(pid, SIGKILL);
+		    usleep(20000);
+		}
+	    }
+	    else
+	    {
+		plog("charon refused to be started");
+	    }
+	    return -1;
+	}
+    }
+    return -1;
+}