2 * Copyright (C) 2006-2008 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>
27 #include "dccp_recv.cmdline.h"
29 /** the size of the output buffer */
30 #define DCCP_BUFSIZE 40960
33 * data specific to the dccp receiver
35 * \sa receiver receiver_node
37 struct private_dccp_recv_data {
38 /** the file descriptor for the dccp socket */
43 static void dccp_recv_close(struct receiver_node *rn)
46 struct private_dccp_recv_data *pdd = rn->private_data;
48 if (pdd && pdd->fd > 0)
52 free(rn->private_data);
53 rn->private_data = NULL;
57 static int dccp_recv_open(struct receiver_node *rn)
59 struct private_dccp_recv_data *pdd;
60 struct dccp_recv_args_info *conf = rn->conf;
61 int fd, ret = makesock(AF_UNSPEC, IPPROTO_DCCP, 0, conf->host_arg,
68 * Disable unused CCIDs: the receiver does not send any application
69 * data to the server. By shutting down this unused path we reduce
70 * internal processing costs, as the unused CCIDs (in the kernel) are
73 if (shutdown(fd, SHUT_WR) < 0) {
74 ret = -ERRNO_TO_PARA_ERROR(errno);
77 ret = mark_fd_nonblocking(fd);
80 rn->buf = para_calloc(DCCP_BUFSIZE);
81 rn->private_data = pdd = para_calloc(sizeof(struct private_dccp_recv_data));
89 static void dccp_shutdown(void)
94 static void *dccp_recv_parse_config(int argc, char **argv)
96 struct dccp_recv_args_info *tmp = para_calloc(sizeof(struct dccp_recv_args_info));
98 if (!dccp_recv_cmdline_parser(argc, argv, tmp))
104 static void dccp_recv_pre_select(struct sched *s, struct task *t)
106 struct receiver_node *rn = container_of(t, struct receiver_node, task);
107 struct private_dccp_recv_data *pdd = rn->private_data;
110 para_fd_set(pdd->fd, &s->rfds, &s->max_fileno);
113 static void dccp_recv_post_select(struct sched *s, struct task *t)
115 struct receiver_node *rn = container_of(t, struct receiver_node, task);
116 struct private_dccp_recv_data *pdd = rn->private_data;
118 if (rn->output_error && *rn->output_error < 0) {
119 t->error = *rn->output_error;
122 if (!FD_ISSET(pdd->fd, &s->rfds))
123 return; /* nothing to do */
124 if (rn->loaded >= DCCP_BUFSIZE) {
125 t->error = -E_DCCP_OVERRUN;
128 t->error = recv_bin_buffer(pdd->fd, rn->buf + rn->loaded,
129 DCCP_BUFSIZE - rn->loaded);
131 rn->loaded += t->error;
135 t->error = -E_RECV_EOF;
139 * The init function of the dccp receiver.
141 * \param r Pointer to the receiver struct to initialize.
143 * Initialize all function pointers of \a r.
145 void dccp_recv_init(struct receiver *r)
147 struct dccp_recv_args_info dummy;
149 dccp_recv_cmdline_parser_init(&dummy);
150 r->shutdown = dccp_shutdown;
151 r->open = dccp_recv_open;
152 r->close = dccp_recv_close;
153 r->pre_select = dccp_recv_pre_select;
154 r->post_select = dccp_recv_post_select;
155 r->parse_config = dccp_recv_parse_config;
156 r->help = (struct ggo_help) {
157 .short_help = dccp_recv_args_info_help,
158 .detailed_help = dccp_recv_args_info_detailed_help