1 /* $NetBSD: t_bpf.c,v 1.5 2012/08/14 19:40:30 alnsn Exp $ */
4 * Copyright (c) 2010 Antti Kantee. All Rights Reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __RCSID("$NetBSD: t_bpf.c,v 1.5 2012/08/14 19:40:30 alnsn Exp $");
30 #include <sys/param.h>
31 #include <sys/ioctl.h>
32 #include <sys/socket.h>
34 #include <sys/sysctl.h>
45 #include <rump/rump.h>
46 #include <rump/rump_syscalls.h>
48 /* XXX: atf-c.h has collisions with mbuf */
53 #include "../../h_macros.h"
54 #include "../config/netconfig.c"
57 ATF_TC_HEAD(bpfwriteleak, tc)
60 atf_tc_set_md_var(tc, "descr", "Checks that writing to /dev/bpf "
61 "does not leak mbufs");
68 size_t mbstatlen = sizeof(mbstat);
69 const int mbstat_mib[] = { CTL_KERN, KERN_MBUF, MBUF_STATS };
71 RL(rump_sys___sysctl(mbstat_mib, __arraycount(mbstat_mib),
72 &mbstat, &mbstatlen, NULL, 0));
73 return mbstat.m_mtypes[MT_DATA];
76 ATF_TC_BODY(bpfwriteleak, tc)
78 char buf[28]; /* sizeof(garbage) > etherhdrlen */
83 RZ(rump_pub_shmif_create(NULL, &ifnum));
84 sprintf(ifr.ifr_name, "shmif%d", ifnum);
86 RL(bpfd = rump_sys_open("/dev/bpf", O_RDWR));
87 RL(rump_sys_ioctl(bpfd, BIOCSETIF, &ifr));
88 RL(rump_sys_ioctl(bpfd, BIOCSFEEDBACK, &ifr));
91 atf_tc_fail("test precondition failed: MT_DATA mbufs != 0");
93 ATF_REQUIRE_ERRNO(ENETDOWN, rump_sys_write(bpfd, buf, sizeof(buf))==-1);
95 ATF_REQUIRE_EQ(getmtdata(), 0);
98 #if (SIZE_MAX > UINT_MAX)
99 ATF_TC(bpfwritetrunc);
100 ATF_TC_HEAD(bpfwritetrunc, tc)
102 atf_tc_set_md_var(tc, "descr", "Checks that write to /dev/bpf "
103 "does not truncate size_t to int");
106 ATF_TC_BODY(bpfwritetrunc, tc)
112 const size_t extra_bytes = 28;
113 const size_t total = extra_bytes + UINT_MAX + 1;
114 long iov_max, vm_page_size; /* round_page wants vm_page_size variable */
116 memset(&ifr, 0, sizeof(ifr));
118 iov_max = sysconf(_SC_IOV_MAX);
119 vm_page_size = sysconf(_SC_PAGE_SIZE);
120 ATF_REQUIRE(iov_max > 1 && vm_page_size > 1);
123 * Minimize memory consumption by using many iovecs
124 * all pointing to one memory region.
126 iov = calloc(iov_max, sizeof(struct iovec));
127 ATF_REQUIRE(iov != NULL);
129 sz = round_page((total + (iov_max - 1)) / iov_max);
132 iov[0].iov_base = mmap(NULL, sz, PROT_READ, MAP_ANON, -1, 0);
133 ATF_REQUIRE(iov[0].iov_base != MAP_FAILED);
136 while (sz + iov[0].iov_len <= total)
138 iov[iovlen].iov_len = iov[0].iov_len;
139 iov[iovlen].iov_base = iov[0].iov_base;
140 sz += iov[0].iov_len;
146 iov[iovlen].iov_len = total - sz;
147 iov[iovlen].iov_base = iov[0].iov_base;
152 ATF_REQUIRE(iovlen >= 1 && iovlen <= (size_t)iov_max);
153 ATF_REQUIRE_EQ(iov[iovlen-1].iov_len, total % iov[0].iov_len);
156 netcfg_rump_makeshmif("bpfwritetrunc", ifr.ifr_name);
157 netcfg_rump_if(ifr.ifr_name, "10.1.1.1", "255.0.0.0");
159 RL(bpfd = rump_sys_open("/dev/bpf", O_RDWR));
160 RL(rump_sys_ioctl(bpfd, BIOCSETIF, &ifr));
162 ATF_CHECK_ERRNO(EMSGSIZE, rump_sys_writev(bpfd, iov, iovlen) == -1);
164 munmap(iov[0].iov_base, iov[0].iov_len);
167 #endif /* #if (SIZE_MAX > UINT_MAX) */
172 ATF_TP_ADD_TC(tp, bpfwriteleak);
173 #if (SIZE_MAX > UINT_MAX)
174 ATF_TP_ADD_TC(tp, bpfwritetrunc);
176 return atf_no_error();