1 /*
2 * Copyright (C) 2013-2021 Canonical, Ltd.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17 *
18 * This code is a complete clean re-write of the stress tool by
19 * Colin Ian King <colin.king@canonical.com> and attempts to be
20 * backwardly compatible with the stress tool by Amos Waterland
21 * <apw@rossby.metr.ou.edu> but has more stress tests and more
22 * functionality.
23 *
24 */
25 #include "stress-ng.h"
26
27 static const stress_help_t help[] = {
28 { NULL, "ping-sock N", "start N workers that exercises a ping socket" },
29 { NULL, "ping-sock-ops N", "stop after N ping sendto messages" },
30 { NULL, NULL, NULL }
31 };
32
33 #if defined(PF_INET) && \
34 defined(SOCK_DGRAM) && \
35 defined(IPPROTO_ICMP) && \
36 defined(HAVE_ICMPHDR) && \
37 defined(__linux__)
38
39 /*
40 * stress_ping_sock
41 * UDP flood
42 */
stress_ping_sock(const stress_args_t * args)43 static int stress_ping_sock(const stress_args_t *args)
44 {
45 int fd, rc = EXIT_SUCCESS, j = 0;
46 struct sockaddr_in addr;
47 struct icmphdr *icmp_hdr;
48 const size_t sz = 4;
49 int rand_port;
50 char ALIGN64 buf[sizeof(*icmp_hdr) + sz];
51
52 static const char data[64] =
53 "0123456789ABCDEFGHIJKLMNOPQRSTUV"
54 "WXYZabcdefghijklmnopqrstuvwxyz@!";
55
56 if ((fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_ICMP)) < 0) {
57 if (errno == EPROTONOSUPPORT) {
58 pr_inf_skip("%s: skipping stressor, protocol not supported\n",
59 args->name);
60 return EXIT_NOT_IMPLEMENTED;
61 }
62 if ((errno == EPERM) || (errno == EACCES)) {
63 pr_inf_skip("%s: skipping stressor, permission denied\n",
64 args->name);
65 return EXIT_NOT_IMPLEMENTED;
66 }
67 pr_fail("%s: socket failed, errno=%d (%s)\n",
68 args->name, errno, strerror(errno));
69 return EXIT_FAILURE;
70 }
71
72 (void)memset(&addr, 0, sizeof(addr));
73 addr.sin_family = AF_INET;
74 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
75
76 icmp_hdr = (struct icmphdr *)buf;
77 (void)memset(icmp_hdr, 0, sizeof(*icmp_hdr));
78 icmp_hdr->type = ICMP_ECHO;
79 icmp_hdr->un.echo.id = (uint16_t)getpid(); /* some unique ID */
80 icmp_hdr->un.echo.sequence = 1;
81
82 rand_port = 1024 + (stress_mwc16() % (65535 - 1024));
83
84 stress_set_proc_state(args->name, STRESS_STATE_RUN);
85
86 do {
87 (void)memset(buf + sizeof(*icmp_hdr), data[j++ & 63], sz);
88 addr.sin_port = htons(rand_port);
89
90 if (sendto(fd, buf, sizeof(buf), 0, (struct sockaddr *)&addr, sizeof(addr)) > 0)
91 inc_counter(args);
92
93 icmp_hdr->un.echo.sequence++;
94 rand_port++;
95 if (rand_port > 65535)
96 rand_port = 0;
97 } while (keep_stressing(args));
98
99 stress_set_proc_state(args->name, STRESS_STATE_DEINIT);
100
101 (void)close(fd);
102
103 return rc;
104 }
105
106 stressor_info_t stress_ping_sock_info = {
107 .stressor = stress_ping_sock,
108 .class = CLASS_NETWORK | CLASS_OS,
109 .help = help
110 };
111 #else
112 stressor_info_t stress_ping_sock_info = {
113 .stressor = stress_not_implemented,
114 .class = CLASS_NETWORK | CLASS_OS,
115 .help = help
116 };
117 #endif
118