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>
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 fd
, ret
= makesock(AF_UNSPEC
, IPPROTO_DCCP
, 0, conf
->host_arg
,
67 * Disable unused CCIDs: the receiver does not send any application
68 * data to the server. By shutting down this unused path we reduce
69 * internal processing costs, as the unused CCIDs (in the kernel) are
72 if (shutdown(fd
, SHUT_WR
) < 0) {
73 ret
= -ERRNO_TO_PARA_ERROR(errno
);
76 ret
= mark_fd_nonblocking(fd
);
79 rn
->buf
= para_calloc(DCCP_BUFSIZE
);
80 rn
->private_data
= pdd
= para_calloc(sizeof(struct private_dccp_recv_data
));
88 static void dccp_shutdown(void)
93 static void *dccp_recv_parse_config(int argc
, char **argv
)
95 struct dccp_recv_args_info
*tmp
= para_calloc(sizeof(struct dccp_recv_args_info
));
97 if (!dccp_recv_cmdline_parser(argc
, argv
, tmp
))
103 static void dccp_recv_pre_select(struct sched
*s
, struct task
*t
)
105 struct receiver_node
*rn
= t
->private_data
;
106 struct private_dccp_recv_data
*pdd
= rn
->private_data
;
109 para_fd_set(pdd
->fd
, &s
->rfds
, &s
->max_fileno
);
112 static void dccp_recv_post_select(struct sched
*s
, struct task
*t
)
114 struct receiver_node
*rn
= t
->private_data
;
115 struct private_dccp_recv_data
*pdd
= rn
->private_data
;
117 if (rn
->output_error
&& *rn
->output_error
) {
118 t
->ret
= *rn
->output_error
;
122 if (!s
->select_ret
|| !FD_ISSET(pdd
->fd
, &s
->rfds
))
123 goto out
; /* nothing to do */
124 t
->ret
= -E_DCCP_OVERRUN
;
125 if (rn
->loaded
>= DCCP_BUFSIZE
)
127 t
->ret
= recv_bin_buffer(pdd
->fd
, rn
->buf
+ rn
->loaded
,
128 DCCP_BUFSIZE
- rn
->loaded
);
131 t
->ret
= -E_RECV_EOF
;
134 rn
->loaded
+= t
->ret
;
142 * the init function of the dccp receiver
144 * \param r pointer to the receiver struct to initialize
146 * Initialize all function pointers of \a r
148 void dccp_recv_init(struct receiver
*r
)
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
;