fix gcc warnings on shadowed declarations
[paraslash.git] / dccp.c
1 /*
2 * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (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, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
17 */
18
19 /** \file dccp.c common functions of the dccp sender/receiver */
20
21 /*
22 * based on common.c of dccp-cs-0.01.tar.bz2,
23 * (C) 2005 Ian McDonald <imcdnzl@gmail.com>
24 */
25
26 #include "para.h"
27 #include "error.h"
28 #include "dccp.h"
29 #include "fd.h"
30
31 /** \cond some magic dccp constants */
32 #define SOL_DCCP 269
33 #define SOCK_DCCP 6
34 #define IPPROTO_DCCP 33
35 #define DCCP_SOCKOPT_PACKET_SIZE 1
36 #define DCCP_SOCKOPT_SERVICE 2
37 /** \endcond */
38
39 /**
40 * obtain a dccp socket for sending/receiving
41 *
42 * \return the file descriptor of the new socket or \p -E_DCCP_SOCKET
43 * on errors.
44 */
45 int dccp_get_socket(void)
46 {
47 int s = socket(AF_INET, SOCK_DCCP, IPPROTO_DCCP);
48
49 if (s < 0)
50 return -E_DCCP_SOCKET;
51 return s;
52 }
53
54 /**
55 * prepare a dccp socket
56 *
57 * \param fd the file descriptor of the socket
58 *
59 * \returns positive on success, negative on errors.
60 */
61 int dccp_set_socket(int fd)
62 {
63 int pkt_size = 256, ret;
64
65 /* hack to get a service code */
66 ret = setsockopt(fd, SOL_DCCP, DCCP_SOCKOPT_PACKET_SIZE,
67 (char*)&pkt_size, sizeof(pkt_size));
68 if (ret < 0)
69 return -E_DCCP_PACKET_SIZE;
70 ret = setsockopt(fd, SOL_DCCP, DCCP_SOCKOPT_SERVICE,
71 (char*)&pkt_size, sizeof(pkt_size));
72 if (ret < 0)
73 return -E_DCCP_SERVICE;
74 return 1;
75 }