1 #include <darwintest.h>
2 #include <sys/socket.h>
3 #include <net/if.h>
4 #include <sys/ioctl.h>
5
6 static void __unused
create_interfaces(const char * prefix,int num)7 create_interfaces(const char *prefix, int num)
8 {
9 static int fd = -1;
10
11 if (fd == -1) {
12 fd = socket(PF_INET, SOCK_STREAM, 0);
13 T_QUIET; T_ASSERT_POSIX_SUCCESS(fd, "socket");
14 }
15 for (int i = 0; i < num; i++) {
16 struct ifreq ifr = {};
17
18 sprintf(ifr.ifr_name, "%s%d", prefix, i);
19 int ret = ioctl(fd, SIOCIFCREATE, &ifr);
20 if (errno == EEXIST) {
21 continue;
22 }
23 T_QUIET; T_ASSERT_POSIX_SUCCESS(ret, "SIOCIFCREATE");
24 memset(&ifr, 0, sizeof(ifr));
25 sprintf(ifr.ifr_name, "%s%d", prefix, i);
26 ret = ioctl(fd, SIOCIFDESTROY, &ifr);
27 T_QUIET; T_ASSERT_POSIX_SUCCESS(ret, "SIOCIFDESTROY");
28 if (i % 100 == 0) {
29 printf("created %s%d\n", prefix, i);
30 }
31 }
32 }
33
34
35 T_DECL(test_ifnet_overflow,
36 "Verify that we don't crash when we create many interfaces",
37 T_META_CHECK_LEAKS(false), T_META_TAG_VM_PREFERRED)
38 {
39 #if 1
40 T_SKIP("Not stable yet");
41 #else
42 create_interfaces("vlan", 32768);
43 create_interfaces("feth", 32768);
44 #endif
45 }
46