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>
27 #include "buffer_tree.h"
29 #include "dccp_recv.cmdline.h"
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 */
39 struct btr_pool
*btrp
;
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)
50 btr_pool_free(pdd
->btrp
);
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
,
61 conf
->port_arg
, NULL
);
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
->private_data
= pdd
= para_calloc(sizeof(struct private_dccp_recv_data
));
80 pdd
->btrp
= btr_pool_new("dccp_recv", 320 * 1024);
88 static void *dccp_recv_parse_config(int argc
, char **argv
)
90 struct dccp_recv_args_info
*tmp
= para_calloc(sizeof(struct dccp_recv_args_info
));
92 if (!dccp_recv_cmdline_parser(argc
, argv
, tmp
))
98 static void dccp_recv_pre_select(struct sched
*s
, struct task
*t
)
100 struct receiver_node
*rn
= container_of(t
, struct receiver_node
, task
);
101 struct private_dccp_recv_data
*pdd
= rn
->private_data
;
104 if (generic_recv_pre_select(s
, t
) <= 0)
106 para_fd_set(pdd
->fd
, &s
->rfds
, &s
->max_fileno
);
109 static void dccp_recv_post_select(struct sched
*s
, struct task
*t
)
111 struct receiver_node
*rn
= container_of(t
, struct receiver_node
, task
);
112 struct private_dccp_recv_data
*pdd
= rn
->private_data
;
113 struct btr_node
*btrn
= rn
->btrn
;
117 ret
= btr_node_status(btrn
, 0, BTR_NT_ROOT
);
122 if (!FD_ISSET(pdd
->fd
, &s
->rfds
))
123 return; /* nothing to do */
124 iovcnt
= btr_pool_get_buffers(pdd
->btrp
, iov
);
125 ret
= -E_DCCP_OVERRUN
;
128 ret
= para_readv(pdd
->fd
, iov
, iovcnt
);
133 if (ret
<= iov
[0].iov_len
) /* only the first buffer was filled */
134 btr_add_output_pool(pdd
->btrp
, ret
, btrn
);
135 else { /* both buffers contain data */
136 btr_add_output_pool(pdd
->btrp
, iov
[0].iov_len
, btrn
);
137 btr_add_output_pool(pdd
->btrp
, ret
- iov
[0].iov_len
, btrn
);
141 btr_remove_node(rn
->btrn
);
145 static void dccp_recv_free_config(void *conf
)
147 dccp_recv_cmdline_parser_free(conf
);
152 * The init function of the dccp receiver.
154 * \param r Pointer to the receiver struct to initialize.
156 * Initialize all function pointers of \a r.
158 void dccp_recv_init(struct receiver
*r
)
160 struct dccp_recv_args_info dummy
;
162 dccp_recv_cmdline_parser_init(&dummy
);
163 r
->open
= dccp_recv_open
;
164 r
->close
= dccp_recv_close
;
165 r
->pre_select
= dccp_recv_pre_select
;
166 r
->post_select
= dccp_recv_post_select
;
167 r
->parse_config
= dccp_recv_parse_config
;
168 r
->free_config
= dccp_recv_free_config
;
169 r
->help
= (struct ggo_help
) {
170 .short_help
= dccp_recv_args_info_help
,
171 .detailed_help
= dccp_recv_args_info_detailed_help
173 dccp_recv_cmdline_parser_free(&dummy
);