1  /*
       2   * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
       3   * Copyright (c) 2017-2021 The strace developers.
       4   * All rights reserved.
       5   *
       6   * SPDX-License-Identifier: GPL-2.0-or-later
       7   */
       8  
       9  #include "tests.h"
      10  #include <stdio.h>
      11  #include <string.h>
      12  #include <unistd.h>
      13  #include <sys/socket.h>
      14  #include "test_netlink.h"
      15  #include <linux/selinux_netlink.h>
      16  
      17  static void
      18  test_nlmsg_type(const int fd)
      19  {
      20  	long rc;
      21  	struct nlmsghdr nlh = {
      22  		.nlmsg_len = sizeof(nlh),
      23  		.nlmsg_type = SELNL_MSG_SETENFORCE,
      24  		.nlmsg_flags = NLM_F_REQUEST,
      25  	};
      26  
      27  	rc = sendto(fd, &nlh, sizeof(nlh), MSG_DONTWAIT, NULL, 0);
      28  	printf("sendto(%d, {nlmsg_len=%u, nlmsg_type=SELNL_MSG_SETENFORCE"
      29  	       ", nlmsg_flags=NLM_F_REQUEST, nlmsg_seq=0, nlmsg_pid=0}"
      30  	       ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
      31  	       fd, nlh.nlmsg_len, (unsigned) sizeof(nlh), sprintrc(rc));
      32  }
      33  
      34  static void
      35  test_selnl_msg_unspec(const int fd)
      36  {
      37  	void *const nlh0 = midtail_alloc(NLMSG_HDRLEN, 4);
      38  
      39  	TEST_NETLINK_(fd, nlh0,
      40  		      0xffff, "0xffff /* SELNL_MSG_??? */",
      41  		      NLM_F_REQUEST, "NLM_F_REQUEST",
      42  		      4, "1234", 4,
      43  		      printf("\"\\x31\\x32\\x33\\x34\""));
      44  }
      45  
      46  static void
      47  test_selnl_msg_setenforce(const int fd)
      48  {
      49  	static const struct selnl_msg_setenforce msg = {
      50  		.val = 0xfbdcdfab
      51  	};
      52  	void *const nlh0 = midtail_alloc(NLMSG_HDRLEN, sizeof(msg));
      53  
      54  	TEST_NETLINK_OBJECT(fd, nlh0,
      55  			    SELNL_MSG_SETENFORCE, NLM_F_REQUEST, msg,
      56  			    printf("{");
      57  			    PRINT_FIELD_D(msg, val);
      58  			    printf("}"));
      59  }
      60  
      61  static void
      62  test_selnl_msg_policyload(const int fd)
      63  {
      64  	static const struct selnl_msg_policyload msg = {
      65  		.seqno = 0xabdcfabc
      66  	};
      67  	void *const nlh0 = midtail_alloc(NLMSG_HDRLEN, sizeof(msg));
      68  
      69  	TEST_NETLINK_OBJECT(fd, nlh0,
      70  			    SELNL_MSG_POLICYLOAD, NLM_F_REQUEST, msg,
      71  			    printf("{");
      72  			    PRINT_FIELD_U(msg, seqno);
      73  			    printf("}"));
      74  }
      75  
      76  int main(void)
      77  {
      78  	skip_if_unavailable("/proc/self/fd/");
      79  
      80  	int fd = create_nl_socket(NETLINK_SELINUX);
      81  
      82  	test_nlmsg_type(fd);
      83  	test_selnl_msg_unspec(fd);
      84  	test_selnl_msg_setenforce(fd);
      85  	test_selnl_msg_policyload(fd);
      86  
      87  	printf("+++ exited with 0 +++\n");
      88  
      89  	return 0;
      90  }