Initial import of t_shmat.
[pcca-tests.git] / mqueue.h / t_mq_send_dos.c
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1/*
2 * Copyright (c) 2010, Stathis Kamperis
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
15 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
17 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
18 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
24 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <assert.h>
29#include <errno.h>
30#include <limits.h> /* for LONG_MAX */
31#include <mqueue.h>
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h> /* memset() */
35
815b9887 36#define MQNAME "/t_mq_send_dos"
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37
38int
39main(void)
40{
41 /*
42 * Create a message queue with enormous capacity.
43 * According to POSIX, mq_maxmsg field is of `long' data type.
44 */
45 struct mq_attr attr;
46 mqd_t md;
47
48 memset(&attr, 0, sizeof(attr));
815b9887 49 attr.mq_maxmsg = LONG_MAX; /* Maximum number of messages. */
50 attr.mq_msgsize = 1024; /* Maximum message size. */
b3f92a66 51
815b9887 52 md = mq_open(MQNAME, O_CREAT | O_EXCL | O_WRONLY, 0700, &attr);
53 if (md == (mqd_t)-1) {
54 assert(errno == EINVAL);
55 printf("passed\n");
56 return (EXIT_SUCCESS);
57 }
b3f92a66 58
01e07384 59 /*
60 * Start sending messages until we consume all memory.
61 *
62 * In OSes that implement message queues inside the kernel,
63 * this could lead to a panic and a denial of service attack.
64 *
65 * Such implementations may be found in {Net, DragonFly}BSD, as
66 * opposed to the userland mqueue incarnation of Solaris.
67 */
815b9887 68 char buf[1024];
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69 long i;
70
71 for (i = 0; i < LONG_MAX; i++)
72 assert(mq_send(md, buf, sizeof(buf), /* priority */ 0) != -1);
73
74 assert(mq_close(md) != -1);
75 assert(mq_unlink(MQNAME) != -1);
76
815b9887 77 printf("passed (Oh My God!)\n");
78
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79 return (EXIT_SUCCESS);
80}