1*2c2f96dcSApple OSS Distributions #include <stdlib.h>
2*2c2f96dcSApple OSS Distributions
3*2c2f96dcSApple OSS Distributions #include <pthread.h>
4*2c2f96dcSApple OSS Distributions #include <sys/kern_control.h>
5*2c2f96dcSApple OSS Distributions #include <sys/socket.h>
6*2c2f96dcSApple OSS Distributions #include <sys/sys_domain.h>
7*2c2f96dcSApple OSS Distributions #include <unistd.h>
8*2c2f96dcSApple OSS Distributions
9*2c2f96dcSApple OSS Distributions #include <darwintest.h>
10*2c2f96dcSApple OSS Distributions
11*2c2f96dcSApple OSS Distributions /* we should win the race in this window: */
12*2c2f96dcSApple OSS Distributions #define NTRIES 200000
13*2c2f96dcSApple OSS Distributions
14*2c2f96dcSApple OSS Distributions static void *
connect_race(void * data)15*2c2f96dcSApple OSS Distributions connect_race(void *data)
16*2c2f96dcSApple OSS Distributions {
17*2c2f96dcSApple OSS Distributions int *ps = data;
18*2c2f96dcSApple OSS Distributions struct sockaddr_ctl sc = {
19*2c2f96dcSApple OSS Distributions .sc_id = 1 /* com.apple.flow-divert */
20*2c2f96dcSApple OSS Distributions };
21*2c2f96dcSApple OSS Distributions int n;
22*2c2f96dcSApple OSS Distributions
23*2c2f96dcSApple OSS Distributions for (n = 0; n < NTRIES; ++n) {
24*2c2f96dcSApple OSS Distributions connect(*ps, (const struct sockaddr *)&sc, sizeof(sc));
25*2c2f96dcSApple OSS Distributions }
26*2c2f96dcSApple OSS Distributions
27*2c2f96dcSApple OSS Distributions return NULL;
28*2c2f96dcSApple OSS Distributions }
29*2c2f96dcSApple OSS Distributions
30*2c2f96dcSApple OSS Distributions T_DECL(flow_div_doubleconnect_55917185, "Bad error path in double-connect for flow_divert_kctl_connect")
31*2c2f96dcSApple OSS Distributions {
32*2c2f96dcSApple OSS Distributions int s = -1;
33*2c2f96dcSApple OSS Distributions int tmp_s;
34*2c2f96dcSApple OSS Distributions struct sockaddr_ctl sc = {
35*2c2f96dcSApple OSS Distributions .sc_id = 1 /* com.apple.flow-divert */
36*2c2f96dcSApple OSS Distributions };
37*2c2f96dcSApple OSS Distributions pthread_t t;
38*2c2f96dcSApple OSS Distributions int n;
39*2c2f96dcSApple OSS Distributions
40*2c2f96dcSApple OSS Distributions T_SETUPBEGIN;
41*2c2f96dcSApple OSS Distributions T_ASSERT_POSIX_ZERO(pthread_create(&t, NULL, connect_race, &s), NULL);
42*2c2f96dcSApple OSS Distributions T_SETUPEND;
43*2c2f96dcSApple OSS Distributions
44*2c2f96dcSApple OSS Distributions for (n = 0; n < NTRIES; ++n) {
45*2c2f96dcSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(tmp_s = socket(AF_SYSTEM, SOCK_DGRAM, SYSPROTO_CONTROL), NULL);
46*2c2f96dcSApple OSS Distributions
47*2c2f96dcSApple OSS Distributions /*
48*2c2f96dcSApple OSS Distributions * this bind will fail, but that's ok because it initialises
49*2c2f96dcSApple OSS Distributions * kctl:
50*2c2f96dcSApple OSS Distributions */
51*2c2f96dcSApple OSS Distributions bind(tmp_s, (const struct sockaddr *)&sc, sizeof(sc));
52*2c2f96dcSApple OSS Distributions
53*2c2f96dcSApple OSS Distributions /* this is what we're racing the other thread for: */
54*2c2f96dcSApple OSS Distributions s = tmp_s;
55*2c2f96dcSApple OSS Distributions connect(s, (const struct sockaddr *)&sc, sizeof(sc));
56*2c2f96dcSApple OSS Distributions
57*2c2f96dcSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(close(s), NULL);
58*2c2f96dcSApple OSS Distributions s = -1;
59*2c2f96dcSApple OSS Distributions }
60*2c2f96dcSApple OSS Distributions
61*2c2f96dcSApple OSS Distributions T_ASSERT_POSIX_ZERO(pthread_join(t, NULL), NULL);
62*2c2f96dcSApple OSS Distributions T_PASS("flow_divert_kctl_connect race didn't trigger panic");
63*2c2f96dcSApple OSS Distributions }
64