2 * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file dccp_recv.c paraslash's dccp receiver */
10 * based on client.c of dccp-cs-0.01.tar.bz2,
11 * (C) 2005 Ian McDonald <imcdnzl@gmail.com>
14 #include <sys/types.h>
26 #include "dccp_recv.cmdline.h"
28 /** the size of the output buffer */
29 #define DCCP_BUFSIZE 40960
32 * data specific to the dccp receiver
34 * \sa receiver receiver_node
36 struct private_dccp_recv_data {
37 /** the file descriptor for the dccp socket */
42 static void dccp_recv_close(struct receiver_node *rn)
45 struct private_dccp_recv_data *pdd = rn->private_data;
47 if (pdd && pdd->fd > 0)
51 free(rn->private_data);
52 rn->private_data = NULL;
56 static int dccp_recv_open(struct receiver_node *rn)
58 struct private_dccp_recv_data *pdd;
59 struct dccp_recv_args_info *conf = rn->conf;
60 int ret = makesock(AF_UNSPEC, IPPROTO_DCCP, 0, conf->host_arg, conf->port_arg);
65 * Disable unused CCIDs: the receiver does not send any application data to the
66 * server. By shutting down this unused path we reduce internal processing costs,
67 * as the unused CCIDs (in the kernel) are then bypassed.
69 if (shutdown(ret, SHUT_WR) < 0)
70 return -ERRNO_TO_PARA_ERROR(errno);
72 rn->buf = para_calloc(DCCP_BUFSIZE);
73 rn->private_data = pdd = para_calloc(sizeof(struct private_dccp_recv_data));
76 mark_fd_nonblocking(pdd->fd);
80 static void dccp_shutdown(void)
85 static void *dccp_recv_parse_config(int argc, char **argv)
87 struct dccp_recv_args_info *tmp = para_calloc(sizeof(struct dccp_recv_args_info));
89 if (!dccp_recv_cmdline_parser(argc, argv, tmp))
95 static void dccp_recv_pre_select(struct sched *s, struct task *t)
97 struct receiver_node *rn = t->private_data;
98 struct private_dccp_recv_data *pdd = rn->private_data;
101 para_fd_set(pdd->fd, &s->rfds, &s->max_fileno);
104 static void dccp_recv_post_select(struct sched *s, struct task *t)
106 struct receiver_node *rn = t->private_data;
107 struct private_dccp_recv_data *pdd = rn->private_data;
109 if (rn->output_error && *rn->output_error) {
110 t->ret = *rn->output_error;
114 if (!s->select_ret || !FD_ISSET(pdd->fd, &s->rfds))
115 goto out; /* nothing to do */
116 t->ret = -E_DCCP_OVERRUN;
117 if (rn->loaded >= DCCP_BUFSIZE)
119 t->ret = recv_bin_buffer(pdd->fd, rn->buf + rn->loaded,
120 DCCP_BUFSIZE - rn->loaded);
123 t->ret = -E_RECV_EOF;
126 rn->loaded += t->ret;
134 * the init function of the dccp receiver
136 * \param r pointer to the receiver struct to initialize
138 * Initialize all function pointers of \a r
140 void dccp_recv_init(struct receiver *r)
142 r->shutdown = dccp_shutdown;
143 r->open = dccp_recv_open;
144 r->close = dccp_recv_close;
145 r->pre_select = dccp_recv_pre_select;
146 r->post_select = dccp_recv_post_select;
147 r->parse_config = dccp_recv_parse_config;