1 | /* Internet Socket Example |
2 | Copyright (C) 1991-2022 Free Software Foundation, Inc. |
3 | |
4 | This program is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU General Public License |
6 | as published by the Free Software Foundation; either version 2 |
7 | of the License, or (at your option) any later version. |
8 | |
9 | This program is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | GNU General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU General Public License |
15 | along with this program; if not, see <https://www.gnu.org/licenses/>. |
16 | */ |
17 | |
18 | #include <stdio.h> |
19 | #include <stdlib.h> |
20 | #include <sys/socket.h> |
21 | #include <netinet/in.h> |
22 | |
23 | int |
24 | make_socket (uint16_t port) |
25 | { |
26 | int sock; |
27 | struct sockaddr_in name; |
28 | |
29 | /* Create the socket. */ |
30 | sock = socket (PF_INET, SOCK_STREAM, protocol: 0); |
31 | if (sock < 0) |
32 | { |
33 | perror ("socket" ); |
34 | exit (EXIT_FAILURE); |
35 | } |
36 | |
37 | /* Give the socket a name. */ |
38 | name.sin_family = AF_INET; |
39 | name.sin_port = htons (port); |
40 | name.sin_addr.s_addr = htonl (INADDR_ANY); |
41 | if (bind (fd: sock, addr: (struct sockaddr *) &name, len: sizeof (name)) < 0) |
42 | { |
43 | perror ("bind" ); |
44 | exit (EXIT_FAILURE); |
45 | } |
46 | |
47 | return sock; |
48 | } |
49 | |