netlink_selinux.c

/*
 * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
 * Copyright (c) 2017 The strace developers.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "defs.h"
#include "netlink.h"
#include "print_fields.h"

#include <linux/selinux_netlink.h>

bool
decode_netlink_selinux(struct tcb *const tcp,
		       const struct nlmsghdr *const nlmsghdr,
		       const kernel_ulong_t addr,
		       const unsigned int len)
{
	switch (nlmsghdr->nlmsg_type) {
	case SELNL_MSG_SETENFORCE: {
		struct selnl_msg_setenforce msg;

		if (len < sizeof(msg))
			printstr_ex(tcp, addr, len, QUOTE_FORCE_HEX);
		else if (!umove_or_printaddr(tcp, addr, &msg)) {
			PRINT_FIELD_D("{", msg, val);
			tprints("}");
		}
		break;
	}
	case SELNL_MSG_POLICYLOAD: {
		struct selnl_msg_policyload msg;

		if (len < sizeof(msg))
			printstr_ex(tcp, addr, len, QUOTE_FORCE_HEX);
		else if (!umove_or_printaddr(tcp, addr, &msg)) {
			PRINT_FIELD_U("{", msg, seqno);
			tprints("}");
		}
		break;
	}
	default:
		return false;
	}

	return true;
}