Imported Upstream version 4.5.2

1 files changed, 211 insertions, 0 deletions

diff --git a/src/libcharon/plugins/duplicheck/duplicheck_notify.c b/src/libcharon/plugins/duplicheck/duplicheck_notify.c
new file mode 100644
index 000000000..4e7618235
--- /dev/null
+++ b/src/libcharon/plugins/duplicheck/duplicheck_notify.c
@@ -0,0 +1,211 @@
+/*
+ * Copyright (C) 2011 Martin Willi
+ * Copyright (C) 2011 revosec AG
+ *
+ * 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.
+ */
+
+#include "duplicheck_notify.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include <daemon.h>
+#include <threading/mutex.h>
+#include <threading/thread.h>
+#include <utils/linked_list.h>
+#include <processing/jobs/callback_job.h>
+
+#define DUPLICHECK_SOCKET IPSEC_PIDDIR "/charon.dck"
+
+typedef struct private_duplicheck_notify_t private_duplicheck_notify_t;
+
+/**
+ * Private data of an duplicheck_notify_t object.
+ */
+struct private_duplicheck_notify_t {
+
+	/**
+	 * Public duplicheck_notify_t interface.
+	 */
+	duplicheck_notify_t public;
+
+	/**
+	 * Callback job dispatching connections
+	 */
+	callback_job_t *job;
+
+	/**
+	 * Mutex to lock list
+	 */
+	mutex_t *mutex;
+
+	/**
+	 * List of connected sockets
+	 */
+	linked_list_t *connected;
+
+	/**
+	 * Socket dispatching connections
+	 */
+	int socket;
+};
+
+/**
+ * Open duplicheck unix socket
+ */
+static bool open_socket(private_duplicheck_notify_t *this)
+{
+	struct sockaddr_un addr;
+	mode_t old;
+
+	addr.sun_family = AF_UNIX;
+	strcpy(addr.sun_path, DUPLICHECK_SOCKET);
+
+	this->socket = socket(AF_UNIX, SOCK_SEQPACKET, 0);
+	if (this->socket == -1)
+	{
+		DBG1(DBG_CFG, "creating duplicheck socket failed");
+		return FALSE;
+	}
+	unlink(addr.sun_path);
+	old = umask(~(S_IRWXU | S_IRWXG));
+	if (bind(this->socket, (struct sockaddr*)&addr, sizeof(addr)) < 0)
+	{
+		DBG1(DBG_CFG, "binding duplicheck socket failed: %s", strerror(errno));
+		close(this->socket);
+		return FALSE;
+	}
+	umask(old);
+	if (chown(addr.sun_path, charon->uid, charon->gid) != 0)
+	{
+		DBG1(DBG_CFG, "changing duplicheck socket permissions failed: %s",
+			 strerror(errno));
+	}
+	if (listen(this->socket, 3) < 0)
+	{
+		DBG1(DBG_CFG, "listening on duplicheck socket failed: %s",
+			 strerror(errno));
+		close(this->socket);
+		unlink(addr.sun_path);
+		return FALSE;
+	}
+	return TRUE;
+}
+
+/**
+ * Accept duplicheck notification connections
+ */
+static job_requeue_t receive(private_duplicheck_notify_t *this)
+{
+	struct sockaddr_un addr;
+	int len = sizeof(addr);
+	uintptr_t fd;
+	bool oldstate;
+
+	oldstate = thread_cancelability(TRUE);
+	fd = accept(this->socket, (struct sockaddr*)&addr, &len);
+	thread_cancelability(oldstate);
+
+	if (fd != -1)
+	{
+		this->mutex->lock(this->mutex);
+		this->connected->insert_last(this->connected, (void*)fd);
+		this->mutex->unlock(this->mutex);
+	 }
+	 else
+	 {
+		 DBG1(DBG_CFG, "accepting duplicheck connection failed: %s",
+			  strerror(errno));
+	 }
+	 return JOB_REQUEUE_FAIR;
+}
+
+METHOD(duplicheck_notify_t, send_, void,
+	private_duplicheck_notify_t *this, identification_t *id)
+{
+	char buf[128];
+	enumerator_t *enumerator;
+	uintptr_t fd;
+	int len;
+
+	len = snprintf(buf, sizeof(buf), "%Y", id);
+	if (len > 0 && len < sizeof(buf))
+	{
+		this->mutex->lock(this->mutex);
+		enumerator = this->connected->create_enumerator(this->connected);
+		while (enumerator->enumerate(enumerator, &fd))
+		{
+			if (send(fd, &buf, len + 1, 0) != len + 1)
+			{
+				DBG1(DBG_CFG, "sending duplicheck notify failed: %s",
+					 strerror(errno));
+				this->connected->remove_at(this->connected, enumerator);
+				close(fd);
+			}
+		}
+		enumerator->destroy(enumerator);
+		this->mutex->unlock(this->mutex);
+	}
+}
+
+METHOD(duplicheck_notify_t, destroy, void,
+	private_duplicheck_notify_t *this)
+{
+	enumerator_t *enumerator;
+	uintptr_t fd;
+
+	if (this->job)
+	{
+		this->job->cancel(this->job);
+	}
+	enumerator = this->connected->create_enumerator(this->connected);
+	while (enumerator->enumerate(enumerator, &fd))
+	{
+		close(fd);
+	}
+	enumerator->destroy(enumerator);
+	this->connected->destroy(this->connected);
+	this->mutex->destroy(this->mutex);
+	free(this);
+}
+
+/**
+ * See header
+ */
+duplicheck_notify_t *duplicheck_notify_create()
+{
+	private_duplicheck_notify_t *this;
+
+	INIT(this,
+		.public = {
+			.send = _send_,
+			.destroy = _destroy,
+		},
+		.connected = linked_list_create(),
+		.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
+	);
+
+	if (!open_socket(this))
+	{
+		destroy(this);
+		return NULL;
+	}
+	this->job = callback_job_create((callback_job_cb_t)receive,
+									this, NULL, NULL);
+	lib->processor->queue_job(lib->processor, (job_t*)this->job);
+
+	return &this->public;
+}