1 /*
2 * Copyright (c) 2020-2024 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29 /* <rdar://problem/58673168> Restricted port used by non-entitled process */
30
31 #include <assert.h>
32 #include <errno.h>
33 #include <stdio.h>
34 #include <spawn.h>
35 #include <stdlib.h>
36 #include <string.h>
37 #include <unistd.h>
38 #include <sys/types.h>
39 #include <sys/sysctl.h>
40 #include "skywalk_test_driver.h"
41 #include "skywalk_test_utils.h"
42 #include "skywalk_test_common.h"
43
44 static int
skt_reserve_restricted_port()45 skt_reserve_restricted_port()
46 {
47 int error;
48 int old_first, old_last;
49 int restricted_port = 55555;
50 size_t size;
51
52 size = sizeof(old_first);
53 error = sysctlbyname("net.inet.ip.portrange.first", &old_first, &size, &restricted_port, sizeof(restricted_port));
54 SKTC_ASSERT_ERR(!error);
55 assert(size == sizeof(old_first));
56
57 size = sizeof(old_last);
58 error = sysctlbyname("net.inet.ip.portrange.last", &old_last, &size, &restricted_port, sizeof(restricted_port));
59 SKTC_ASSERT_ERR(!error);
60 assert(size == sizeof(old_last));
61
62 struct sktc_nexus_handles handles;
63 sktc_create_flowswitch(&handles, 0);
64
65 uuid_t flow;
66
67 /* try reserve one of the restricted ephemeral ports */
68 uuid_generate_random(flow);
69 error = sktc_bind_tcp4_flow(handles.controller, handles.fsw_nx_uuid,
70 0, NEXUS_PORT_FLOW_SWITCH_CLIENT, flow);
71 SKTC_ASSERT_ERR(error == -1);
72 SKTC_ASSERT_ERR(errno == EADDRNOTAVAIL);
73 uuid_clear(flow);
74
75 sktc_cleanup_flowswitch(&handles);
76
77 size = sizeof(old_first);
78 error = sysctlbyname("net.inet.ip.portrange.first", NULL, NULL, &old_first, size);
79 SKTC_ASSERT_ERR(!error);
80 assert(size == sizeof(old_first));
81
82 size = sizeof(old_last);
83 error = sysctlbyname("net.inet.ip.portrange.last", NULL, NULL, &old_last, size);
84 SKTC_ASSERT_ERR(!error);
85 assert(size == sizeof(old_last));
86 return 0;
87 }
88
89 int
skt_reserve_restricted_port_main(int argc,char * argv[])90 skt_reserve_restricted_port_main(int argc, char *argv[])
91 {
92 return skt_reserve_restricted_port();
93 }
94
95
96 struct skywalk_test skt_restricted_port = {
97 "restricted_port", "test reserve a restricted ephemeral port",
98 SK_FEATURE_SKYWALK | SK_FEATURE_NEXUS_NETIF | SK_FEATURE_NEXUS_FLOWSWITCH | SK_FEATURE_NETNS,
99 skt_reserve_restricted_port_main, { NULL }, sktc_ifnet_feth0_create, sktc_ifnet_feth0_destroy,
100 };
101