]>
Commit | Line | Data |
---|---|---|
5707a64d | 1 | /* Test entering namespaces. |
581c785b | 2 | Copyright (C) 2016-2022 Free Software Foundation, Inc. |
5707a64d FW |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
5707a64d | 18 | |
76637a92 FW |
19 | #include <errno.h> |
20 | #include <netdb.h> | |
5707a64d | 21 | #include <stdio.h> |
76637a92 | 22 | #include <support/check.h> |
5707a64d | 23 | #include <support/namespace.h> |
76637a92 FW |
24 | #include <support/xsocket.h> |
25 | #include <support/xunistd.h> | |
26 | ||
27 | /* Check that the loopback interface provides multiple addresses which | |
28 | can be used to run independent servers. */ | |
29 | static void | |
30 | test_localhost_bind (void) | |
31 | { | |
32 | printf ("info: testing loopback interface with multiple addresses\n"); | |
33 | ||
34 | /* Create the two server addresses. */ | |
35 | static const struct addrinfo hints = | |
36 | { | |
37 | .ai_family = AF_INET, | |
38 | .ai_socktype = SOCK_DGRAM, | |
39 | .ai_protocol = IPPROTO_UDP, | |
40 | }; | |
41 | struct addrinfo *ai[3]; | |
42 | TEST_VERIFY_EXIT (getaddrinfo ("127.0.0.1", "53", &hints, ai + 0) == 0); | |
43 | TEST_VERIFY_EXIT (getaddrinfo ("127.0.0.2", "53", &hints, ai + 1) == 0); | |
44 | TEST_VERIFY_EXIT (getaddrinfo ("127.0.0.3", "53", &hints, ai + 2) == 0); | |
45 | ||
46 | /* Create the server scokets and bind them to these addresses. */ | |
47 | int sockets[3]; | |
48 | for (int i = 0; i < 3; ++i) | |
49 | { | |
50 | sockets[i] = xsocket | |
51 | (ai[i]->ai_family, ai[i]->ai_socktype, ai[i]->ai_protocol); | |
52 | xbind (sockets[i], ai[i]->ai_addr, ai[i]->ai_addrlen); | |
53 | } | |
54 | ||
55 | /* Send two packets to each server. */ | |
56 | int client = xsocket (AF_INET, SOCK_DGRAM, IPPROTO_UDP); | |
57 | for (int i = 0; i < 3; ++i) | |
58 | { | |
59 | TEST_VERIFY (sendto (client, &i, sizeof (i), 0, | |
60 | ai[i]->ai_addr, ai[i]->ai_addrlen) == sizeof (i)); | |
61 | int j = i + 256; | |
62 | TEST_VERIFY (sendto (client, &j, sizeof (j), 0, | |
63 | ai[i]->ai_addr, ai[i]->ai_addrlen) == sizeof (j)); | |
64 | } | |
65 | ||
66 | /* Check that the packets can be received with the expected | |
67 | contents. Note that the receive calls interleave differently, | |
68 | which hopefully proves that the sockets are, indeed, | |
69 | independent. */ | |
70 | for (int i = 0; i < 3; ++i) | |
71 | { | |
72 | int buf; | |
73 | TEST_VERIFY (recv (sockets[i], &buf, sizeof (buf), 0) == sizeof (buf)); | |
74 | TEST_VERIFY (buf == i); | |
75 | } | |
76 | for (int i = 0; i < 3; ++i) | |
77 | { | |
78 | int buf; | |
79 | TEST_VERIFY (recv (sockets[i], &buf, sizeof (buf), 0) == sizeof (buf)); | |
80 | TEST_VERIFY (buf == i + 256); | |
81 | /* Check that there is no more data to receive. */ | |
82 | TEST_VERIFY (recv (sockets[i], &buf, sizeof (buf), MSG_DONTWAIT) == -1); | |
83 | TEST_VERIFY (errno == EWOULDBLOCK || errno == EAGAIN); | |
84 | } | |
85 | ||
86 | /* Close all sockets and free the addresses. */ | |
87 | for (int i = 0; i < 3; ++i) | |
88 | { | |
89 | freeaddrinfo (ai[i]); | |
90 | xclose (sockets[i]); | |
91 | } | |
92 | xclose (client); | |
93 | } | |
94 | ||
5707a64d FW |
95 | |
96 | static int | |
97 | do_test (void) | |
98 | { | |
76637a92 FW |
99 | bool root = support_become_root (); |
100 | if (root) | |
5707a64d | 101 | printf ("info: acquired root-like privileges\n"); |
76637a92 FW |
102 | bool netns = support_enter_network_namespace (); |
103 | if (netns) | |
5707a64d FW |
104 | printf ("info: entered network namespace\n"); |
105 | if (support_in_uts_namespace ()) | |
106 | printf ("info: also entered UTS namespace\n"); | |
76637a92 FW |
107 | |
108 | if (root && netns) | |
109 | test_localhost_bind (); | |
110 | ||
5707a64d FW |
111 | return 0; |
112 | } | |
113 | ||
114 | #include <support/test-driver.c> |