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/* Create sockets for use in tests (client side).
Copyright (C) 2011-2023 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2011. */
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
/* Creates a client socket, by connecting to a server on the given port. */
static int
create_client_socket (int port)
{
int client_socket;
/* Create a client socket. */
client_socket = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
ASSERT (client_socket >= 0);
/* Connect to the server process at the specified port. */
{
struct sockaddr_in addr;
memset (&addr, 0, sizeof (addr)); /* needed on AIX and OSF/1 */
addr.sin_family = AF_INET;
#if 0 /* Unoptimized */
inet_pton (AF_INET, "127.0.0.1", &addr.sin_addr);
#elif 0 /* Nearly optimized */
addr.sin_addr.s_addr = htonl (0x7F000001); /* 127.0.0.1 */
#else /* Fully optimized */
{
unsigned char dotted[4] = { 127, 0, 0, 1 }; /* 127.0.0.1 */
memcpy (&addr.sin_addr.s_addr, dotted, 4);
}
#endif
addr.sin_port = htons (port);
ASSERT (connect (client_socket,
(const struct sockaddr *) &addr, sizeof (addr))
== 0);
}
return client_socket;
}
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