| /* Test entering namespaces. |
| Copyright (C) 2016-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <netdb.h> |
| #include <stdio.h> |
| #include <support/check.h> |
| #include <support/namespace.h> |
| #include <support/xsocket.h> |
| #include <support/xunistd.h> |
| |
| /* Check that the loopback interface provides multiple addresses which |
| can be used to run independent servers. */ |
| static void |
| test_localhost_bind (void) |
| { |
| printf ("info: testing loopback interface with multiple addresses\n"); |
| |
| /* Create the two server addresses. */ |
| static const struct addrinfo hints = |
| { |
| .ai_family = AF_INET, |
| .ai_socktype = SOCK_DGRAM, |
| .ai_protocol = IPPROTO_UDP, |
| }; |
| struct addrinfo *ai[3]; |
| TEST_VERIFY_EXIT (getaddrinfo ("127.0.0.1", "53", &hints, ai + 0) == 0); |
| TEST_VERIFY_EXIT (getaddrinfo ("127.0.0.2", "53", &hints, ai + 1) == 0); |
| TEST_VERIFY_EXIT (getaddrinfo ("127.0.0.3", "53", &hints, ai + 2) == 0); |
| |
| /* Create the server scokets and bind them to these addresses. */ |
| int sockets[3]; |
| for (int i = 0; i < 3; ++i) |
| { |
| sockets[i] = xsocket |
| (ai[i]->ai_family, ai[i]->ai_socktype, ai[i]->ai_protocol); |
| xbind (sockets[i], ai[i]->ai_addr, ai[i]->ai_addrlen); |
| } |
| |
| /* Send two packets to each server. */ |
| int client = xsocket (AF_INET, SOCK_DGRAM, IPPROTO_UDP); |
| for (int i = 0; i < 3; ++i) |
| { |
| TEST_VERIFY (sendto (client, &i, sizeof (i), 0, |
| ai[i]->ai_addr, ai[i]->ai_addrlen) == sizeof (i)); |
| int j = i + 256; |
| TEST_VERIFY (sendto (client, &j, sizeof (j), 0, |
| ai[i]->ai_addr, ai[i]->ai_addrlen) == sizeof (j)); |
| } |
| |
| /* Check that the packets can be received with the expected |
| contents. Note that the receive calls interleave differently, |
| which hopefully proves that the sockets are, indeed, |
| independent. */ |
| for (int i = 0; i < 3; ++i) |
| { |
| int buf; |
| TEST_VERIFY (recv (sockets[i], &buf, sizeof (buf), 0) == sizeof (buf)); |
| TEST_VERIFY (buf == i); |
| } |
| for (int i = 0; i < 3; ++i) |
| { |
| int buf; |
| TEST_VERIFY (recv (sockets[i], &buf, sizeof (buf), 0) == sizeof (buf)); |
| TEST_VERIFY (buf == i + 256); |
| /* Check that there is no more data to receive. */ |
| TEST_VERIFY (recv (sockets[i], &buf, sizeof (buf), MSG_DONTWAIT) == -1); |
| TEST_VERIFY (errno == EWOULDBLOCK || errno == EAGAIN); |
| } |
| |
| /* Close all sockets and free the addresses. */ |
| for (int i = 0; i < 3; ++i) |
| { |
| freeaddrinfo (ai[i]); |
| xclose (sockets[i]); |
| } |
| xclose (client); |
| } |
| |
| |
| static int |
| do_test (void) |
| { |
| bool root = support_become_root (); |
| if (root) |
| printf ("info: acquired root-like privileges\n"); |
| bool netns = support_enter_network_namespace (); |
| if (netns) |
| printf ("info: entered network namespace\n"); |
| if (support_in_uts_namespace ()) |
| printf ("info: also entered UTS namespace\n"); |
| |
| if (root && netns) |
| test_localhost_bind (); |
| |
| return 0; |
| } |
| |
| #include <support/test-driver.c> |