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[FreeBSD/releng/10.2.git] / contrib / netbsd-tests / net / bpf / t_div-by-zero.c
1 #include <sys/types.h>
2 #include <sys/ioctl.h>
3
4 #include <net/bpf.h>
5
6 #include <atf-c.h>
7 #include <fcntl.h>
8
9 #include <rump/rump.h>
10 #include <rump/rump_syscalls.h>
11
12 ATF_TC(div_by_zero);
13 ATF_TC_HEAD(div_by_zero, tc)
14 {
15
16         atf_tc_set_md_var(tc, "descr", "Check that BPF rejects a filter "
17             "which divides by 0");
18 }
19
20 ATF_TC_BODY(div_by_zero, tc)
21 {
22         struct bpf_program bp;
23         int fd;
24
25         /*
26          * Source code for following program:
27          * link[0:4]/0 = 2
28          */
29         struct bpf_insn bins[] = {
30             { 0x20, 0, 0, 0x00000000 },
31             { 0x34, 0, 0, 0x00000000 },
32             { 0x15, 0, 1, 0x00000002 },
33             { 0x6, 0, 0, 0x00000060 },
34             { 0x6, 0, 0, 0x00000000 },
35         };
36
37         bp.bf_len = __arraycount(bins);
38         bp.bf_insns = bins;
39
40         rump_init();
41         fd = rump_sys_open("/dev/bpf", O_RDWR);
42         ATF_CHECK(fd != -1);
43         ATF_REQUIRE_EQ_MSG(rump_sys_ioctl(fd, BIOCSETF, &bp), -1,
44             "bpf accepted program with division by zero");
45 }
46
47 ATF_TP_ADD_TCS(tp)
48 {
49
50         ATF_TP_ADD_TC(tp, div_by_zero);
51         return atf_no_error();
52 }