1 /*
2 * Copyright (c) 2017 JingPiao Chen <chenjingpiao@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 #include <stdio.h>
32 #include <string.h>
33 #include <arpa/inet.h>
34 #include <net/if.h>
35 #include <netinet/tcp.h>
36 #include "test_nlattr.h"
37 #include <linux/inet_diag.h>
38 #include <linux/sock_diag.h>
39
40 static const char * const sk_meminfo_strs[] = {
41 "SK_MEMINFO_RMEM_ALLOC",
42 "SK_MEMINFO_RCVBUF",
43 "SK_MEMINFO_WMEM_ALLOC",
44 "SK_MEMINFO_SNDBUF",
45 "SK_MEMINFO_FWD_ALLOC",
46 "SK_MEMINFO_WMEM_QUEUED",
47 "SK_MEMINFO_OPTMEM",
48 "SK_MEMINFO_BACKLOG",
49 "SK_MEMINFO_DROPS",
50 };
51
52 static const char address[] = "10.11.12.13";
53
54 static void
init_inet_diag_msg(struct nlmsghdr * const nlh,const unsigned int msg_len)55 init_inet_diag_msg(struct nlmsghdr *const nlh, const unsigned int msg_len)
56 {
57 SET_STRUCT(struct nlmsghdr, nlh,
58 .nlmsg_len = msg_len,
59 .nlmsg_type = SOCK_DIAG_BY_FAMILY,
60 .nlmsg_flags = NLM_F_DUMP
61 );
62
63 struct inet_diag_msg *const msg = NLMSG_DATA(nlh);
64 SET_STRUCT(struct inet_diag_msg, msg,
65 .idiag_family = AF_INET,
66 .idiag_state = TCP_LISTEN,
67 .id.idiag_if = ifindex_lo()
68 );
69
70 if (!inet_pton(AF_INET, address, msg->id.idiag_src) ||
71 !inet_pton(AF_INET, address, msg->id.idiag_dst))
72 perror_msg_and_skip("inet_pton");
73 }
74
75 static void
print_inet_diag_msg(const unsigned int msg_len)76 print_inet_diag_msg(const unsigned int msg_len)
77 {
78 printf("{len=%u, type=SOCK_DIAG_BY_FAMILY"
79 ", flags=NLM_F_DUMP, seq=0, pid=0}, {idiag_family=AF_INET"
80 ", idiag_state=TCP_LISTEN, idiag_timer=0, idiag_retrans=0"
81 ", id={idiag_sport=htons(0), idiag_dport=htons(0)"
82 ", idiag_src=inet_addr(\"%s\")"
83 ", idiag_dst=inet_addr(\"%s\")"
84 ", idiag_if=" IFINDEX_LO_STR
85 ", idiag_cookie=[0, 0]}"
86 ", idiag_expires=0, idiag_rqueue=0, idiag_wqueue=0"
87 ", idiag_uid=0, idiag_inode=0}",
88 msg_len, address, address);
89 }
90
91 static void
print_uint(const unsigned int * p,size_t i)92 print_uint(const unsigned int *p, size_t i)
93 {
94 if (i >= ARRAY_SIZE(sk_meminfo_strs))
95 printf("[%zu /* SK_MEMINFO_??? */", i);
96 else
97 printf("[%s", sk_meminfo_strs[i]);
98
99 printf("] = %u", *p);
100 }
101
102 int
main(void)103 main(void)
104 {
105 skip_if_unavailable("/proc/self/fd/");
106
107 static const struct inet_diag_meminfo minfo = {
108 .idiag_rmem = 0xfadcacdb,
109 .idiag_wmem = 0xbdabcada,
110 .idiag_fmem = 0xbadbfafb,
111 .idiag_tmem = 0xfdacdadf
112 };
113 static const struct tcpvegas_info vegas = {
114 .tcpv_enabled = 0xfadcacdb,
115 .tcpv_rttcnt = 0xbdabcada,
116 .tcpv_rtt = 0xbadbfafb,
117 .tcpv_minrtt = 0xfdacdadf
118 };
119 static const struct tcp_dctcp_info dctcp = {
120 .dctcp_enabled = 0xfdac,
121 .dctcp_ce_state = 0xfadc,
122 .dctcp_alpha = 0xbdabcada,
123 .dctcp_ab_ecn = 0xbadbfafb,
124 .dctcp_ab_tot = 0xfdacdadf
125 };
126 static const struct tcp_bbr_info bbr = {
127 .bbr_bw_lo = 0xfdacdadf,
128 .bbr_bw_hi = 0xfadcacdb,
129 .bbr_min_rtt = 0xbdabcada,
130 .bbr_pacing_gain = 0xbadbfafb,
131 .bbr_cwnd_gain = 0xfdacdadf
132 };
133 static const uint32_t mem[] = { 0xaffacbad, 0xffadbcab };
134 static uint32_t bigmem[SK_MEMINFO_VARS + 1];
135 static const uint32_t mark = 0xabdfadca;
136 static const uint8_t shutdown = 0xcd;
137
138 const int fd = create_nl_socket(NETLINK_SOCK_DIAG);
139 const unsigned int hdrlen = sizeof(struct inet_diag_msg);
140 void *const nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen),
141 NLA_HDRLEN +
142 MAX(sizeof(bigmem), DEFAULT_STRLEN));
143
144 static char pattern[4096];
145 fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
146
147 TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
148 init_inet_diag_msg, print_inet_diag_msg,
149 INET_DIAG_MEMINFO, pattern, minfo,
150 PRINT_FIELD_U("{", minfo, idiag_rmem);
151 PRINT_FIELD_U(", ", minfo, idiag_wmem);
152 PRINT_FIELD_U(", ", minfo, idiag_fmem);
153 PRINT_FIELD_U(", ", minfo, idiag_tmem);
154 printf("}"));
155
156 TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
157 init_inet_diag_msg, print_inet_diag_msg,
158 INET_DIAG_VEGASINFO, pattern, vegas,
159 PRINT_FIELD_U("{", vegas, tcpv_enabled);
160 PRINT_FIELD_U(", ", vegas, tcpv_rttcnt);
161 PRINT_FIELD_U(", ", vegas, tcpv_rtt);
162 PRINT_FIELD_U(", ", vegas, tcpv_minrtt);
163 printf("}"));
164
165
166 TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
167 init_inet_diag_msg, print_inet_diag_msg,
168 INET_DIAG_DCTCPINFO, pattern, dctcp,
169 PRINT_FIELD_U("{", dctcp, dctcp_enabled);
170 PRINT_FIELD_U(", ", dctcp, dctcp_ce_state);
171 PRINT_FIELD_U(", ", dctcp, dctcp_alpha);
172 PRINT_FIELD_U(", ", dctcp, dctcp_ab_ecn);
173 PRINT_FIELD_U(", ", dctcp, dctcp_ab_tot);
174 printf("}"));
175
176 TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
177 init_inet_diag_msg, print_inet_diag_msg,
178 INET_DIAG_BBRINFO, pattern, bbr,
179 PRINT_FIELD_X("{", bbr, bbr_bw_lo);
180 PRINT_FIELD_X(", ", bbr, bbr_bw_hi);
181 PRINT_FIELD_U(", ", bbr, bbr_min_rtt);
182 PRINT_FIELD_U(", ", bbr, bbr_pacing_gain);
183 PRINT_FIELD_U(", ", bbr, bbr_cwnd_gain);
184 printf("}"));
185
186 TEST_NLATTR_ARRAY(fd, nlh0, hdrlen,
187 init_inet_diag_msg, print_inet_diag_msg,
188 INET_DIAG_SKMEMINFO, pattern, mem, print_uint);
189
190 memcpy(bigmem, pattern, sizeof(bigmem));
191
192 TEST_NLATTR_ARRAY(fd, nlh0, hdrlen,
193 init_inet_diag_msg, print_inet_diag_msg,
194 INET_DIAG_SKMEMINFO, pattern, bigmem, print_uint);
195
196 TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
197 init_inet_diag_msg, print_inet_diag_msg,
198 INET_DIAG_MARK, pattern, mark,
199 printf("%u", mark));
200
201 TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
202 init_inet_diag_msg, print_inet_diag_msg,
203 INET_DIAG_CLASS_ID, pattern, mark,
204 printf("%u", mark));
205
206 TEST_NLATTR(fd, nlh0, hdrlen,
207 init_inet_diag_msg, print_inet_diag_msg, INET_DIAG_SHUTDOWN,
208 sizeof(shutdown), &shutdown, sizeof(shutdown),
209 printf("%u", shutdown));
210
211 char *const str = tail_alloc(DEFAULT_STRLEN);
212 fill_memory_ex(str, DEFAULT_STRLEN, '0', 10);
213 TEST_NLATTR(fd, nlh0, hdrlen,
214 init_inet_diag_msg, print_inet_diag_msg, INET_DIAG_CONG,
215 DEFAULT_STRLEN, str, DEFAULT_STRLEN,
216 printf("\"%.*s\"...", DEFAULT_STRLEN, str));
217 str[DEFAULT_STRLEN - 1] = '\0';
218 TEST_NLATTR(fd, nlh0, hdrlen,
219 init_inet_diag_msg, print_inet_diag_msg, INET_DIAG_CONG,
220 DEFAULT_STRLEN, str, DEFAULT_STRLEN,
221 printf("\"%s\"", str));
222
223 puts("+++ exited with 0 +++");
224 return 0;
225 }
226