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maint: Run 'make update-copyright'
author Paul Eggert <eggert@cs.ucla.edu>
date Tue, 01 Jan 2019 00:25:11 +0100
parents 10eb9086bea0
children
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1 /* Create sockets for use in tests (client side).
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2 Copyright (C) 2011-2019 Free Software Foundation, Inc.
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3
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4 This program is free software: you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
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16
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17 /* Written by Bruno Haible <bruno@clisp.org>, 2011. */
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18
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19 #include <stdio.h>
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20 #include <sys/socket.h>
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21 #include <netinet/in.h>
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22 #include <arpa/inet.h>
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23
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24 /* Creates a client socket, by connecting to a server on the given port. */
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25 static int
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26 create_client_socket (int port)
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27 {
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28 int client_socket;
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29
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30 /* Create a client socket. */
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31 client_socket = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
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32 ASSERT (client_socket >= 0);
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33 /* Connect to the server process at the specified port. */
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34 {
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35 struct sockaddr_in addr;
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36
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37 memset (&addr, 0, sizeof (addr)); /* needed on AIX and OSF/1 */
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38 addr.sin_family = AF_INET;
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39 #if 0 /* Unoptimized */
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40 inet_pton (AF_INET, "127.0.0.1", &addr.sin_addr);
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41 #elif 0 /* Nearly optimized */
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42 addr.sin_addr.s_addr = htonl (0x7F000001); /* 127.0.0.1 */
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43 #else /* Fully optimized */
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44 {
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45 unsigned char dotted[4] = { 127, 0, 0, 1 }; /* 127.0.0.1 */
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46 memcpy (&addr.sin_addr.s_addr, dotted, 4);
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47 }
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48 #endif
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49 addr.sin_port = htons (port);
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50
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51 ASSERT (connect (client_socket,
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52 (const struct sockaddr *) &addr, sizeof (addr))
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53 == 0);
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54 }
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55
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56 return client_socket;
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57 }