2 * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
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.
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.
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.
19 /** \file dccp.c common functions of the dccp sender/receiver */
22 * based on common.c of dccp-cs-0.01.tar.bz2,
23 * (C) 2005 Ian McDonald <imcdnzl@gmail.com>
31 /** \cond some magic dccp constants */
34 #define IPPROTO_DCCP 33
35 #define DCCP_SOCKOPT_PACKET_SIZE 1
36 #define DCCP_SOCKOPT_SERVICE 2
40 * obtain a dccp socket for sending/receiving
42 * \return the file descriptor of the new socket or \p -E_DCCP_SOCKET
45 int dccp_get_socket(void)
47 int s = socket(AF_INET, SOCK_DCCP, IPPROTO_DCCP);
50 return -E_DCCP_SOCKET;
55 * prepare a dccp socket
57 * \param fd the file descriptor of the socket
59 * \returns positive on success, negative on errors.
61 int dccp_set_socket(int fd)
63 int pkt_size = 256, ret;
65 /* hack to get a service code */
66 ret = setsockopt(fd, SOL_DCCP, DCCP_SOCKOPT_PACKET_SIZE,
67 (char*)&pkt_size, sizeof(pkt_size));
69 return -E_DCCP_PACKET_SIZE;
70 ret = setsockopt(fd, SOL_DCCP, DCCP_SOCKOPT_SERVICE,
71 (char*)&pkt_size, sizeof(pkt_size));
73 return -E_DCCP_SERVICE;