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
;
139 static void dccp_recv_free_config(void *conf
)
141 dccp_recv_cmdline_parser_free(conf
);
145 * The init function of the dccp receiver.
147 * \param r Pointer to the receiver struct to initialize.
149 * Initialize all function pointers of \a r.
151 void dccp_recv_init(struct receiver
*r
)
153 struct dccp_recv_args_info dummy
;
155 dccp_recv_cmdline_parser_init(&dummy
);
156 r
->shutdown
= dccp_shutdown
;
157 r
->open
= dccp_recv_open
;
158 r
->close
= dccp_recv_close
;
159 r
->pre_select
= dccp_recv_pre_select
;
160 r
->post_select
= dccp_recv_post_select
;
161 r
->parse_config
= dccp_recv_parse_config
;
162 r
->free_config
= dccp_recv_free_config
;
163 r
->help
= (struct ggo_help
) {
164 .short_help
= dccp_recv_args_info_help
,
165 .detailed_help
= dccp_recv_args_info_detailed_help
167 dccp_recv_cmdline_parser_free(&dummy
);