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
;