1*c54f35caSApple OSS Distributions #include <stdlib.h>
2*c54f35caSApple OSS Distributions
3*c54f35caSApple OSS Distributions #include <pthread.h>
4*c54f35caSApple OSS Distributions #include <sys/kern_control.h>
5*c54f35caSApple OSS Distributions #include <sys/socket.h>
6*c54f35caSApple OSS Distributions #include <sys/sys_domain.h>
7*c54f35caSApple OSS Distributions #include <unistd.h>
8*c54f35caSApple OSS Distributions
9*c54f35caSApple OSS Distributions #include <darwintest.h>
10*c54f35caSApple OSS Distributions
11*c54f35caSApple OSS Distributions /* we should win the race in this window: */
12*c54f35caSApple OSS Distributions #define NTRIES 200000
13*c54f35caSApple OSS Distributions
14*c54f35caSApple OSS Distributions static void *
connect_race(void * data)15*c54f35caSApple OSS Distributions connect_race(void *data)
16*c54f35caSApple OSS Distributions {
17*c54f35caSApple OSS Distributions int *ps = data;
18*c54f35caSApple OSS Distributions struct sockaddr_ctl sc = {
19*c54f35caSApple OSS Distributions .sc_id = 1 /* com.apple.flow-divert */
20*c54f35caSApple OSS Distributions };
21*c54f35caSApple OSS Distributions int n;
22*c54f35caSApple OSS Distributions
23*c54f35caSApple OSS Distributions for (n = 0; n < NTRIES; ++n) {
24*c54f35caSApple OSS Distributions connect(*ps, (const struct sockaddr *)&sc, sizeof(sc));
25*c54f35caSApple OSS Distributions }
26*c54f35caSApple OSS Distributions
27*c54f35caSApple OSS Distributions return NULL;
28*c54f35caSApple OSS Distributions }
29*c54f35caSApple OSS Distributions
30*c54f35caSApple OSS Distributions T_DECL(flow_div_doubleconnect_55917185, "Bad error path in double-connect for flow_divert_kctl_connect")
31*c54f35caSApple OSS Distributions {
32*c54f35caSApple OSS Distributions int s = -1;
33*c54f35caSApple OSS Distributions int tmp_s;
34*c54f35caSApple OSS Distributions struct sockaddr_ctl sc = {
35*c54f35caSApple OSS Distributions .sc_id = 1 /* com.apple.flow-divert */
36*c54f35caSApple OSS Distributions };
37*c54f35caSApple OSS Distributions pthread_t t;
38*c54f35caSApple OSS Distributions int n;
39*c54f35caSApple OSS Distributions
40*c54f35caSApple OSS Distributions T_SETUPBEGIN;
41*c54f35caSApple OSS Distributions T_ASSERT_POSIX_ZERO(pthread_create(&t, NULL, connect_race, &s), NULL);
42*c54f35caSApple OSS Distributions T_SETUPEND;
43*c54f35caSApple OSS Distributions
44*c54f35caSApple OSS Distributions for (n = 0; n < NTRIES; ++n) {
45*c54f35caSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(tmp_s = socket(AF_SYSTEM, SOCK_DGRAM, SYSPROTO_CONTROL), NULL);
46*c54f35caSApple OSS Distributions
47*c54f35caSApple OSS Distributions /*
48*c54f35caSApple OSS Distributions * this bind will fail, but that's ok because it initialises
49*c54f35caSApple OSS Distributions * kctl:
50*c54f35caSApple OSS Distributions */
51*c54f35caSApple OSS Distributions bind(tmp_s, (const struct sockaddr *)&sc, sizeof(sc));
52*c54f35caSApple OSS Distributions
53*c54f35caSApple OSS Distributions /* this is what we're racing the other thread for: */
54*c54f35caSApple OSS Distributions s = tmp_s;
55*c54f35caSApple OSS Distributions connect(s, (const struct sockaddr *)&sc, sizeof(sc));
56*c54f35caSApple OSS Distributions
57*c54f35caSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(close(s), NULL);
58*c54f35caSApple OSS Distributions s = -1;
59*c54f35caSApple OSS Distributions }
60*c54f35caSApple OSS Distributions
61*c54f35caSApple OSS Distributions T_ASSERT_POSIX_ZERO(pthread_join(t, NULL), NULL);
62*c54f35caSApple OSS Distributions T_PASS("flow_divert_kctl_connect race didn't trigger panic");
63*c54f35caSApple OSS Distributions }
64