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 "test_nlattr.h"
      13  #include <linux/neighbour.h>
      14  #include <linux/rtnetlink.h>
      15  
      16  static void
      17  init_ndtmsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
      18  {
      19  	SET_STRUCT(struct nlmsghdr, nlh,
      20  		.nlmsg_len = msg_len,
      21  		.nlmsg_type = RTM_GETNEIGHTBL,
      22  		.nlmsg_flags = NLM_F_DUMP
      23  	);
      24  
      25  	struct ndtmsg *const msg = NLMSG_DATA(nlh);
      26  	SET_STRUCT(struct ndtmsg, msg,
      27  		.ndtm_family = AF_NETLINK
      28  	);
      29  }
      30  
      31  static void
      32  print_ndtmsg(const unsigned int msg_len)
      33  {
      34  	printf("{nlmsg_len=%u, nlmsg_type=RTM_GETNEIGHTBL"
      35  	       ", nlmsg_flags=NLM_F_DUMP, nlmsg_seq=0, nlmsg_pid=0}"
      36  	       ", {ndtm_family=AF_NETLINK}",
      37  	       msg_len);
      38  }
      39  
      40  int
      41  main(void)
      42  {
      43  	skip_if_unavailable("/proc/self/fd/");
      44  
      45  	const int fd = create_nl_socket(NETLINK_ROUTE);
      46  	const unsigned int hdrlen = sizeof(struct ndtmsg);
      47  	void *nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen), NLA_HDRLEN + 11 * 8);
      48  
      49  	static char pattern[4096];
      50  	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
      51  
      52  	const unsigned int nla_type = 0xffff & NLA_TYPE_MASK;
      53  	char nla_type_str[256];
      54  	sprintf(nla_type_str, "%#x /* NDTA_??? */", nla_type);
      55  	TEST_NLATTR_(fd, nlh0, hdrlen,
      56  		     init_ndtmsg, print_ndtmsg,
      57  		     nla_type, nla_type_str,
      58  		     4, pattern, 4,
      59  		     print_quoted_hex(pattern, 4));
      60  
      61  	static const struct ndt_config ndtc = {
      62  		.ndtc_key_len = 0xabcd,
      63  		.ndtc_entry_size = 0xbcda,
      64  		.ndtc_entries = 0xcdabedad,
      65  		.ndtc_last_flush = 0xdebaedba,
      66  		.ndtc_last_rand = 0xedadedab,
      67  		.ndtc_hash_rnd = 0xfeadedaf,
      68  		.ndtc_hash_mask = 0xadbcdead,
      69  		.ndtc_hash_chain_gc = 0xbdaedacd,
      70  		.ndtc_proxy_qlen = 0xcdeaedab
      71  	};
      72  	TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
      73  			   init_ndtmsg, print_ndtmsg,
      74  			   NDTA_CONFIG, pattern, ndtc,
      75  			   printf("{");
      76  			   PRINT_FIELD_U(ndtc, ndtc_key_len);
      77  			   printf(", ");
      78  			   PRINT_FIELD_U(ndtc, ndtc_entry_size);
      79  			   printf(", ");
      80  			   PRINT_FIELD_U(ndtc, ndtc_entries);
      81  			   printf(", ");
      82  			   PRINT_FIELD_U(ndtc, ndtc_last_flush);
      83  			   printf(", ");
      84  			   PRINT_FIELD_U(ndtc, ndtc_last_rand);
      85  			   printf(", ");
      86  			   PRINT_FIELD_U(ndtc, ndtc_hash_rnd);
      87  			   printf(", ");
      88  			   PRINT_FIELD_0X(ndtc, ndtc_hash_mask);
      89  			   printf(", ");
      90  			   PRINT_FIELD_U(ndtc, ndtc_hash_chain_gc);
      91  			   printf(", ");
      92  			   PRINT_FIELD_U(ndtc, ndtc_proxy_qlen);
      93  			   printf("}"));
      94  
      95  	static const struct nlattr nla = {
      96  		.nla_len = sizeof(nla),
      97  		.nla_type = NDTPA_IFINDEX
      98  	};
      99  	TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
     100  			   init_ndtmsg, print_ndtmsg,
     101  			   NDTA_PARMS, pattern, nla,
     102  			   printf("{");
     103  			   PRINT_FIELD_U(nla, nla_len);
     104  			   printf(", nla_type=NDTPA_IFINDEX}"));
     105  
     106  	static const struct ndt_stats ndtst = {
     107  		.ndts_allocs		= 0xabcdedabedadedfa,
     108  		.ndts_destroys		= 0xbcdefabefacdbaad,
     109  		.ndts_hash_grows	= 0xcdbadefacdcbaede,
     110  		.ndts_res_failed	= 0xdedbaecfdbcadcfe,
     111  		.ndts_lookups		= 0xedfafdedbdadedec,
     112  		.ndts_hits		= 0xfebdeadebcddeade,
     113  		.ndts_rcv_probes_mcast	= 0xadebfeadecddeafe,
     114  		.ndts_rcv_probes_ucast	= 0xbcdefeacdadecdfe,
     115  		.ndts_periodic_gc_runs	= 0xedffeadedeffbecc,
     116  		.ndts_forced_gc_runs	= 0xfeefefeabedeedcd,
     117  		.ndts_table_fulls	= 0xadebfefaecdfeade
     118  	};
     119  	TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
     120  			   init_ndtmsg, print_ndtmsg,
     121  			   NDTA_STATS, pattern, ndtst,
     122  			   printf("{");
     123  			   PRINT_FIELD_U(ndtst, ndts_allocs);
     124  			   printf(", ");
     125  			   PRINT_FIELD_U(ndtst, ndts_destroys);
     126  			   printf(", ");
     127  			   PRINT_FIELD_U(ndtst, ndts_hash_grows);
     128  			   printf(", ");
     129  			   PRINT_FIELD_U(ndtst, ndts_res_failed);
     130  			   printf(", ");
     131  			   PRINT_FIELD_U(ndtst, ndts_lookups);
     132  			   printf(", ");
     133  			   PRINT_FIELD_U(ndtst, ndts_hits);
     134  			   printf(", ");
     135  			   PRINT_FIELD_U(ndtst, ndts_rcv_probes_mcast);
     136  			   printf(", ");
     137  			   PRINT_FIELD_U(ndtst, ndts_rcv_probes_ucast);
     138  			   printf(", ");
     139  			   PRINT_FIELD_U(ndtst, ndts_periodic_gc_runs);
     140  			   printf(", ");
     141  			   PRINT_FIELD_U(ndtst, ndts_forced_gc_runs);
     142  			   printf(", ");
     143  			   PRINT_FIELD_U(ndtst, ndts_table_fulls);
     144  			   printf("}"));
     145  
     146  	puts("+++ exited with 0 +++");
     147  	return 0;
     148  }