mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-21 20:40:05 +00:00
115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
/* Test entering namespaces.
|
|
Copyright (C) 2016-2024 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
|
|
<https://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>
|