1 /*
2  * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
3  * Copyright (c) 2017 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 #include <stdio.h>
32 #include <stddef.h>
33 #include "test_nlattr.h"
34 #include <linux/pkt_sched.h>
35 #include <linux/rtnetlink.h>
36 
37 static void
38 init_tcmsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
39 {
40 	SET_STRUCT(struct nlmsghdr, nlh,
41 		.nlmsg_len = msg_len,
42 		.nlmsg_type = RTM_GETQDISC,
43 		.nlmsg_flags = NLM_F_DUMP
44 	);
45 
46 	struct tcmsg *const msg = NLMSG_DATA(nlh);
47 	SET_STRUCT(struct tcmsg, msg,
48 		.tcm_family = AF_UNIX,
49 		.tcm_ifindex = ifindex_lo()
50 	);
51 
52 }
53 
54 static void
55 print_tcmsg(const unsigned int msg_len)
56 {
57 	printf("{len=%u, type=RTM_GETQDISC, flags=NLM_F_DUMP"
58 	       ", seq=0, pid=0}, {tcm_family=AF_UNIX"
59 	       ", tcm_ifindex=" IFINDEX_LO_STR
60 	       ", tcm_handle=0, tcm_parent=0, tcm_info=0}",
61 	       msg_len);
62 }
63 
64 int
65 main(void)
66 {
67 	skip_if_unavailable("/proc/self/fd/");
68 
69 	const int fd = create_nl_socket(NETLINK_ROUTE);
70 	const unsigned int hdrlen = sizeof(struct tcmsg);
71 	void *nlh0 = tail_alloc(NLMSG_SPACE(hdrlen));
72 
73 	static char pattern[4096];
74 	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
75 
76 	const unsigned int nla_type = 0xffff & NLA_TYPE_MASK;
77 	char nla_type_str[256];
78 	sprintf(nla_type_str, "%#x /* TCA_??? */", nla_type);
79 	TEST_NLATTR_(fd, nlh0, hdrlen,
80 		     init_tcmsg, print_tcmsg,
81 		     nla_type, nla_type_str,
82 		     4, pattern, 4,
83 		     print_quoted_hex(pattern, 4));
84 
85 	static const struct tc_stats st = {
86 		.bytes = 0xabcdcdbefeadefac,
87 		.packets = 0xbcdeaefd,
88 		.drops = 0xcdedafed,
89 		.overlimits = 0xdcdbefad,
90 		.bps = 0xefaebfad,
91 		.pps = 0xfefbaedb,
92 		.qlen = 0xabcdefab,
93 		.backlog = 0xbdeabeab
94 	};
95 	char buf[offsetofend(struct tc_stats, backlog)];
96 	memcpy(buf, &st, sizeof(buf));
97 	TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
98 			   init_tcmsg, print_tcmsg,
99 			   TCA_STATS, pattern, buf,
100 			   PRINT_FIELD_U("{", st, bytes);
101 			   PRINT_FIELD_U(", ", st, packets);
102 			   PRINT_FIELD_U(", ", st, drops);
103 			   PRINT_FIELD_U(", ", st, overlimits);
104 			   PRINT_FIELD_U(", ", st, bps);
105 			   PRINT_FIELD_U(", ", st, pps);
106 			   PRINT_FIELD_U(", ", st, qlen);
107 			   PRINT_FIELD_U(", ", st, backlog);
108 			   printf("}"));
109 
110 	static const struct tc_estimator est = {
111 		.interval = 0xcd,
112 		.ewma_log = 0xab
113 	};
114 	TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
115 			   init_tcmsg, print_tcmsg,
116 			   TCA_RATE, pattern, est,
117 			   PRINT_FIELD_D("{", est, interval);
118 			   PRINT_FIELD_U(", ", est, ewma_log);
119 			   printf("}"));
120 
121 	puts("+++ exited with 0 +++");
122 	return 0;
123 }
124