2 * Copyright (C) 2006-2009 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>
15 #include <sys/types.h>
28 #include "dccp_recv.cmdline.h"
30 /** the size of the output buffer */
31 #define DCCP_BUFSIZE 40960
34 * data specific to the dccp receiver
36 * \sa receiver receiver_node
38 struct private_dccp_recv_data {
39 /** the file descriptor for the dccp socket */
44 static void dccp_recv_close(struct receiver_node *rn)
47 struct private_dccp_recv_data *pdd = rn->private_data;
49 if (pdd && pdd->fd > 0)
53 free(rn->private_data);
54 rn->private_data = NULL;
58 static int dccp_recv_open(struct receiver_node *rn)
60 struct private_dccp_recv_data *pdd;
61 struct dccp_recv_args_info *conf = rn->conf;
62 int fd, ret = makesock(AF_UNSPEC, IPPROTO_DCCP, 0, conf->host_arg,
69 * Disable unused CCIDs: the receiver does not send any application
70 * data to the server. By shutting down this unused path we reduce
71 * internal processing costs, as the unused CCIDs (in the kernel) are
74 if (shutdown(fd, SHUT_WR) < 0) {
75 ret = -ERRNO_TO_PARA_ERROR(errno);
78 ret = mark_fd_nonblocking(fd);
81 rn->buf = para_calloc(DCCP_BUFSIZE);
82 rn->private_data = pdd = para_calloc(sizeof(struct private_dccp_recv_data));
90 static void dccp_shutdown(void)
95 static void *dccp_recv_parse_config(int argc, char **argv)
97 struct dccp_recv_args_info *tmp = para_calloc(sizeof(struct dccp_recv_args_info));
99 if (!dccp_recv_cmdline_parser(argc, argv, tmp))
105 static void dccp_recv_pre_select(struct sched *s, struct task *t)
107 struct receiver_node *rn = container_of(t, struct receiver_node, task);
108 struct private_dccp_recv_data *pdd = rn->private_data;
111 para_fd_set(pdd->fd, &s->rfds, &s->max_fileno);
114 static void dccp_recv_post_select(struct sched *s, struct task *t)
116 struct receiver_node *rn = container_of(t, struct receiver_node, task);
117 struct private_dccp_recv_data *pdd = rn->private_data;
119 if (rn->output_error && *rn->output_error < 0) {
120 t->error = *rn->output_error;
123 if (!FD_ISSET(pdd->fd, &s->rfds))
124 return; /* nothing to do */
125 if (rn->loaded >= DCCP_BUFSIZE) {
126 t->error = -E_DCCP_OVERRUN;
129 t->error = recv_bin_buffer(pdd->fd, rn->buf + rn->loaded,
130 DCCP_BUFSIZE - rn->loaded);
132 rn->loaded += t->error;
136 t->error = -E_RECV_EOF;
140 * The init function of the dccp receiver.
142 * \param r Pointer to the receiver struct to initialize.
144 * Initialize all function pointers of \a r.
146 void dccp_recv_init(struct receiver *r)
148 struct dccp_recv_args_info dummy;
150 dccp_recv_cmdline_parser_init(&dummy);
151 r->shutdown = dccp_shutdown;
152 r->open = dccp_recv_open;
153 r->close = dccp_recv_close;
154 r->pre_select = dccp_recv_pre_select;
155 r->post_select = dccp_recv_post_select;
156 r->parse_config = dccp_recv_parse_config;
157 r->help = (struct ggo_help) {
158 .short_help = dccp_recv_args_info_help,
159 .detailed_help = dccp_recv_args_info_detailed_help
161 dccp_recv_cmdline_parser_free(&dummy);