1*a325d9c4SApple OSS Distributions #include <stdlib.h>
2*a325d9c4SApple OSS Distributions
3*a325d9c4SApple OSS Distributions #include <pthread.h>
4*a325d9c4SApple OSS Distributions #include <sys/kern_control.h>
5*a325d9c4SApple OSS Distributions #include <sys/socket.h>
6*a325d9c4SApple OSS Distributions #include <sys/sys_domain.h>
7*a325d9c4SApple OSS Distributions #include <unistd.h>
8*a325d9c4SApple OSS Distributions
9*a325d9c4SApple OSS Distributions #include <darwintest.h>
10*a325d9c4SApple OSS Distributions
11*a325d9c4SApple OSS Distributions /* we should win the race in this window: */
12*a325d9c4SApple OSS Distributions #define NTRIES 200000
13*a325d9c4SApple OSS Distributions
14*a325d9c4SApple OSS Distributions static void *
connect_race(void * data)15*a325d9c4SApple OSS Distributions connect_race(void *data)
16*a325d9c4SApple OSS Distributions {
17*a325d9c4SApple OSS Distributions int *ps = data;
18*a325d9c4SApple OSS Distributions struct sockaddr_ctl sc = {
19*a325d9c4SApple OSS Distributions .sc_id = 1 /* com.apple.flow-divert */
20*a325d9c4SApple OSS Distributions };
21*a325d9c4SApple OSS Distributions int n;
22*a325d9c4SApple OSS Distributions
23*a325d9c4SApple OSS Distributions for (n = 0; n < NTRIES; ++n) {
24*a325d9c4SApple OSS Distributions connect(*ps, (const struct sockaddr *)&sc, sizeof(sc));
25*a325d9c4SApple OSS Distributions }
26*a325d9c4SApple OSS Distributions
27*a325d9c4SApple OSS Distributions return NULL;
28*a325d9c4SApple OSS Distributions }
29*a325d9c4SApple OSS Distributions
30*a325d9c4SApple OSS Distributions T_DECL(flow_div_doubleconnect_55917185, "Bad error path in double-connect for flow_divert_kctl_connect")
31*a325d9c4SApple OSS Distributions {
32*a325d9c4SApple OSS Distributions int s = -1;
33*a325d9c4SApple OSS Distributions int tmp_s;
34*a325d9c4SApple OSS Distributions struct sockaddr_ctl sc = {
35*a325d9c4SApple OSS Distributions .sc_id = 1 /* com.apple.flow-divert */
36*a325d9c4SApple OSS Distributions };
37*a325d9c4SApple OSS Distributions pthread_t t;
38*a325d9c4SApple OSS Distributions int n;
39*a325d9c4SApple OSS Distributions
40*a325d9c4SApple OSS Distributions T_SETUPBEGIN;
41*a325d9c4SApple OSS Distributions T_ASSERT_POSIX_ZERO(pthread_create(&t, NULL, connect_race, &s), NULL);
42*a325d9c4SApple OSS Distributions T_SETUPEND;
43*a325d9c4SApple OSS Distributions
44*a325d9c4SApple OSS Distributions for (n = 0; n < NTRIES; ++n) {
45*a325d9c4SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(tmp_s = socket(AF_SYSTEM, SOCK_DGRAM, SYSPROTO_CONTROL), NULL);
46*a325d9c4SApple OSS Distributions
47*a325d9c4SApple OSS Distributions /*
48*a325d9c4SApple OSS Distributions * this bind will fail, but that's ok because it initialises
49*a325d9c4SApple OSS Distributions * kctl:
50*a325d9c4SApple OSS Distributions */
51*a325d9c4SApple OSS Distributions bind(tmp_s, (const struct sockaddr *)&sc, sizeof(sc));
52*a325d9c4SApple OSS Distributions
53*a325d9c4SApple OSS Distributions /* this is what we're racing the other thread for: */
54*a325d9c4SApple OSS Distributions s = tmp_s;
55*a325d9c4SApple OSS Distributions connect(s, (const struct sockaddr *)&sc, sizeof(sc));
56*a325d9c4SApple OSS Distributions
57*a325d9c4SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(close(s), NULL);
58*a325d9c4SApple OSS Distributions s = -1;
59*a325d9c4SApple OSS Distributions }
60*a325d9c4SApple OSS Distributions
61*a325d9c4SApple OSS Distributions T_ASSERT_POSIX_ZERO(pthread_join(t, NULL), NULL);
62*a325d9c4SApple OSS Distributions T_PASS("flow_divert_kctl_connect race didn't trigger panic");
63*a325d9c4SApple OSS Distributions }
64