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socket: Add new test for connect

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This commit adds a simple bind/accept/connect test for an IPv4 TCP
connection to a local process via the loopback interface.

Reviewed-by: Arjun Shankar <arjun@redhat.com>
This commit is contained in:
Sergey Kolosov 2024-04-10 17:58:05 +02:00 committed by Arjun Shankar
parent 6687a6e3f9
commit 3a83f79024
2 changed files with 114 additions and 0 deletions
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1
socket/Makefile
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@ -70,6 +70,7 @@ tests := \
tst-accept4 \
tst-cmsg_cloexec \
tst-cmsghdr \
tst-connect \
tst-sockopt \
# tests

113
socket/tst-connect.c Normal file
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@ -0,0 +1,113 @@
/* Test the connect function.
Copyright (C) 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 <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdbool.h>
#include <support/check.h>
#include <support/xsocket.h>
#include <support/xunistd.h>
#include <sys/socket.h>
#include <stdio.h>
static struct sockaddr_in server_address;
int
open_socket_inet_tcp (void)
{
int fd = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (fd < 0)
{
if (errno == EAFNOSUPPORT)
FAIL_UNSUPPORTED ("The host does not support IPv4");
else
FAIL_EXIT1 ("socket (AF_INET, SOCK_STREAM, IPPROTO_TCP): %m\n");
}
return fd;
}
static pid_t
start_server (void)
{
server_address.sin_family = AF_INET;
server_address.sin_port = 0;
server_address.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
int server_sock = open_socket_inet_tcp ();
xbind (server_sock, (struct sockaddr *) &server_address,
sizeof (server_address));
socklen_t sa_len = sizeof (server_address);
xgetsockname (server_sock, (struct sockaddr *) &server_address, &sa_len);
xlisten (server_sock, 5);
pid_t my_pid = xfork ();
if (my_pid > 0)
{
xclose (server_sock);
return my_pid;
}
struct sockaddr_in client_address;
socklen_t ca_len = sizeof (server_address);
int client_sock = xaccept (server_sock, (struct sockaddr *) &client_address,
&ca_len);
printf ("socket accepted %d\n", client_sock);
_exit (0);
}
static int
do_test (void)
{
pid_t serv_pid;
struct sockaddr_in peer;
socklen_t peer_len;
serv_pid = start_server ();
int client_sock = open_socket_inet_tcp ();
xconnect (client_sock, (const struct sockaddr *) &server_address,
sizeof (server_address));
/* A second connect with same arguments should fail with EISCONN. */
int result = connect (client_sock,
(const struct sockaddr *) &server_address,
sizeof (server_address));
if (result == 0 || errno != EISCONN)
FAIL_EXIT1 ("Second connect (%d), should fail with EISCONN: %m",
client_sock);
peer_len = sizeof (peer);
xgetpeername (client_sock, (struct sockaddr *) &peer, &peer_len);
TEST_COMPARE (peer_len, sizeof (peer));
TEST_COMPARE (peer.sin_port, server_address.sin_port);
TEST_COMPARE_BLOB (&peer.sin_addr, sizeof (peer.sin_addr),
&server_address.sin_addr,
sizeof (server_address.sin_addr));
int status;
xwaitpid (serv_pid, &status, 0);
TEST_COMPARE (status, 0);
return 0;
}
#include <support/test-driver.c>