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      1 /*
      2  * Copyright (c) 2017 JingPiao Chen <chenjingpiao (at) gmail.com>
      3  * Copyright (c) 2017-2018 The strace developers.
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include "tests.h"
     30 
     31 #ifdef HAVE_STRUCT_GNET_STATS_BASIC
     32 
     33 # include <stdio.h>
     34 # include <stddef.h>
     35 # include "test_nlattr.h"
     36 # include <linux/gen_stats.h>
     37 # include <linux/rtnetlink.h>
     38 
     39 const unsigned int hdrlen = sizeof(struct tcmsg);
     40 
     41 static void
     42 init_tcmsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
     43 {
     44 	SET_STRUCT(struct nlmsghdr, nlh,
     45 		.nlmsg_len = msg_len,
     46 		.nlmsg_type = RTM_GETQDISC,
     47 		.nlmsg_flags = NLM_F_DUMP
     48 	);
     49 
     50 	struct tcmsg *const msg = NLMSG_DATA(nlh);
     51 	SET_STRUCT(struct tcmsg, msg,
     52 		.tcm_family = AF_UNIX,
     53 		.tcm_ifindex = ifindex_lo()
     54 	);
     55 
     56 	struct nlattr *const nla = NLMSG_ATTR(nlh, sizeof(*msg));
     57 	SET_STRUCT(struct nlattr, nla,
     58 		.nla_len = msg_len - NLMSG_SPACE(hdrlen),
     59 		.nla_type = TCA_STATS2
     60 	);
     61 }
     62 
     63 static void
     64 print_tcmsg(const unsigned int msg_len)
     65 {
     66 	printf("{len=%u, type=RTM_GETQDISC, flags=NLM_F_DUMP"
     67 	       ", seq=0, pid=0}, {tcm_family=AF_UNIX"
     68 	       ", tcm_ifindex=" IFINDEX_LO_STR
     69 	       ", tcm_handle=0, tcm_parent=0, tcm_info=0}"
     70 	       ", {{nla_len=%u, nla_type=TCA_STATS2}",
     71 	       msg_len, msg_len - NLMSG_SPACE(hdrlen));
     72 }
     73 
     74 int
     75 main(void)
     76 {
     77 	skip_if_unavailable("/proc/self/fd/");
     78 
     79 	const int fd = create_nl_socket(NETLINK_ROUTE);
     80 	void *nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen), NLA_HDRLEN + 8 * 5);
     81 
     82 	static char pattern[4096];
     83 	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
     84 
     85 	static const struct gnet_stats_basic sb = {
     86 		.bytes = 0xabcdebdafefeadeb,
     87 		.packets = 0xbdcdeabf
     88 	};
     89 	char buf[offsetofend(struct gnet_stats_basic, packets)];
     90 	memcpy(buf, &sb, sizeof(buf));
     91 	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
     92 				  init_tcmsg, print_tcmsg,
     93 				  TCA_STATS_BASIC, pattern, buf,
     94 				  PRINT_FIELD_U("{", sb, bytes);
     95 				  PRINT_FIELD_U(", ", sb, packets);
     96 				  printf("}"));
     97 
     98 #ifdef HAVE_STRUCT_GNET_STATS_RATE_EST
     99 	static const struct gnet_stats_rate_est est = {
    100 		.bps = 0xebcdaebd,
    101 		.pps = 0xabdceade,
    102 	};
    103 	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
    104 				  init_tcmsg, print_tcmsg,
    105 				  TCA_STATS_RATE_EST, pattern, est,
    106 				  PRINT_FIELD_U("{", est, bps);
    107 				  PRINT_FIELD_U(", ", est, pps);
    108 				  printf("}"));
    109 #endif
    110 
    111 #ifdef HAVE_STRUCT_GNET_STATS_QUEUE
    112 	static const struct gnet_stats_queue qstats = {
    113 		.qlen = 0xabcdeabd,
    114 		.backlog = 0xbcdaebad,
    115 		.drops = 0xcdbeaedb,
    116 		.requeues = 0xdebaefab,
    117 		.overlimits = 0xefaebade
    118 	};
    119 	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
    120 				  init_tcmsg, print_tcmsg,
    121 				  TCA_STATS_QUEUE, pattern, qstats,
    122 				  PRINT_FIELD_U("{", qstats, qlen);
    123 				  PRINT_FIELD_U(", ", qstats, backlog);
    124 				  PRINT_FIELD_U(", ", qstats, drops);
    125 				  PRINT_FIELD_U(", ", qstats, requeues);
    126 				  PRINT_FIELD_U(", ", qstats, overlimits);
    127 				  printf("}"));
    128 #endif
    129 
    130 #ifdef HAVE_STRUCT_GNET_STATS_RATE_EST64
    131 	static const struct gnet_stats_rate_est64 est64 = {
    132 		.bps = 0xacbdcdefafecaebf,
    133 		.pps = 0xcdabeabdfeabceaf
    134 	};
    135 	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
    136 				  init_tcmsg, print_tcmsg,
    137 				  TCA_STATS_RATE_EST64, pattern, est64,
    138 				  PRINT_FIELD_U("{", est64, bps);
    139 				  PRINT_FIELD_U(", ", est64, pps);
    140 				  printf("}"));
    141 #endif
    142 
    143 	puts("+++ exited with 0 +++");
    144 	return 0;
    145 }
    146 
    147 #else
    148 
    149 SKIP_MAIN_UNDEFINED("HAVE_STRUCT_GNET_STATS_BASIC")
    150 
    151 #endif
    152