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  
      11  #include <stdio.h>
      12  #include <string.h>
      13  #include <stdint.h>
      14  #include "test_nlattr.h"
      15  #include <linux/netlink_diag.h>
      16  #include <linux/sock_diag.h>
      17  
      18  static void
      19  init_netlink_diag_msg(struct nlmsghdr *const nlh, const unsigned int msg_len)
      20  {
      21  	SET_STRUCT(struct nlmsghdr, nlh,
      22  		.nlmsg_len = msg_len,
      23  		.nlmsg_type = SOCK_DIAG_BY_FAMILY,
      24  		.nlmsg_flags = NLM_F_DUMP
      25  	);
      26  
      27  	struct netlink_diag_msg *const msg = NLMSG_DATA(nlh);
      28  	SET_STRUCT(struct netlink_diag_msg, msg,
      29  		.ndiag_family = AF_NETLINK,
      30  		.ndiag_type = SOCK_RAW,
      31  		.ndiag_protocol = NETLINK_ROUTE,
      32  		.ndiag_state = NETLINK_CONNECTED
      33  	);
      34  }
      35  
      36  static void
      37  print_netlink_diag_msg(const unsigned int msg_len)
      38  {
      39  	printf("{nlmsg_len=%u, nlmsg_type=SOCK_DIAG_BY_FAMILY"
      40  	       ", nlmsg_flags=NLM_F_DUMP, nlmsg_seq=0, nlmsg_pid=0}"
      41  	       ", {ndiag_family=AF_NETLINK, ndiag_type=SOCK_RAW"
      42  	       ", ndiag_protocol=NETLINK_ROUTE, ndiag_state=NETLINK_CONNECTED"
      43  	       ", ndiag_portid=0, ndiag_dst_portid=0, ndiag_dst_group=0"
      44  	       ", ndiag_ino=0, ndiag_cookie=[0, 0]}",
      45  	       msg_len);
      46  }
      47  
      48  static void
      49  print_xlong(const unsigned long *p, size_t i)
      50  {
      51  	printf("%#lx", *p);
      52  }
      53  
      54  int
      55  main(void)
      56  {
      57  	skip_if_unavailable("/proc/self/fd/");
      58  
      59  	static const unsigned long groups[] = {
      60  		(unsigned long) 0xdeadbeefbadc0dedULL,
      61  		(unsigned long) 0xdeadbeefbadc0dedULL
      62  	};
      63  	static const struct netlink_diag_ring ndr = {
      64  		.ndr_block_size = 0xfabfabdc,
      65  		.ndr_block_nr = 0xabcdabda,
      66  		.ndr_frame_size = 0xcbadbafa,
      67  		.ndr_frame_nr = 0xdbcafadb
      68  	};
      69  	static const uint32_t flags =
      70  		NDIAG_FLAG_CB_RUNNING | NDIAG_FLAG_PKTINFO;
      71  
      72  	const int fd = create_nl_socket(NETLINK_SOCK_DIAG);
      73  	const unsigned int hdrlen = sizeof(struct netlink_diag_msg);
      74  	void *const nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen),
      75  					 NLA_HDRLEN +
      76  					 MAX(sizeof(groups), sizeof(ndr)));
      77  
      78  	static char pattern[4096];
      79  	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
      80  
      81  	TEST_NLATTR_ARRAY(fd, nlh0, hdrlen,
      82  			  init_netlink_diag_msg, print_netlink_diag_msg,
      83  			  NETLINK_DIAG_GROUPS, pattern, groups, print_xlong);
      84  
      85  	TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
      86  			   init_netlink_diag_msg, print_netlink_diag_msg,
      87  			   NETLINK_DIAG_RX_RING, pattern, ndr,
      88  			   printf("{");
      89  			   PRINT_FIELD_U(ndr, ndr_block_size);
      90  			   printf(", ");
      91  			   PRINT_FIELD_U(ndr, ndr_block_nr);
      92  			   printf(", ");
      93  			   PRINT_FIELD_U(ndr, ndr_frame_size);
      94  			   printf(", ");
      95  			   PRINT_FIELD_U(ndr, ndr_frame_nr);
      96  			   printf("}"));
      97  
      98  	TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
      99  			   init_netlink_diag_msg, print_netlink_diag_msg,
     100  			   NETLINK_DIAG_FLAGS, pattern, flags,
     101  			   printf("NDIAG_FLAG_CB_RUNNING|NDIAG_FLAG_PKTINFO"));
     102  
     103  	puts("+++ exited with 0 +++");
     104  	return 0;
     105  }