2 * Copyright (C) 2006-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file dccp_send.c Paraslash's dccp sender. */
10 * based on server.c of dccp-cs-0.01.tar.bz2,
11 * (C) 2005 Ian McDonald <imcdnzl@gmail.com>
14 #include <sys/types.h>
29 #include "close_on_fork.h"
30 #include "chunk_queue.h"
31 #include "server.cmdline.h"
34 /** Do not write more than that many bytes at once. */
35 #define DCCP_MAX_BYTES_PER_WRITE 1024
37 static struct sender_status dccp_sender_status
, *dss
= &dccp_sender_status
;
39 static void dccp_pre_select(int *max_fileno
, fd_set
*rfds
,
40 __a_unused fd_set
*wfds
)
42 if (dss
->listen_fd
>= 0)
43 para_fd_set(dss
->listen_fd
, rfds
, max_fileno
);
46 static void dccp_post_select(fd_set
*rfds
, __a_unused fd_set
*wfds
)
48 struct sender_client
*sc
;
50 if (dss
->listen_fd
< 0 || !FD_ISSET(dss
->listen_fd
, rfds
))
52 sc
= accept_sender_client(dss
);
56 * Bypass unused CCID paths: the sender does not receive application data
57 * from the client; by shutting down this unused communication path we can
58 * reduce processing costs a bit. See analogous comment in dccp_recv.c.
60 if (shutdown(sc
->fd
, SHUT_RD
) >= 0)
62 PARA_WARNING_LOG("%s\n", strerror(errno
));
63 shutdown_client(sc
, dss
);
66 static void dccp_send(long unsigned current_chunk
,
67 __a_unused
long unsigned chunks_sent
, const char *buf
,
68 size_t len
, const char *header_buf
, size_t header_len
)
70 struct sender_client
*sc
, *tmp
;
72 list_for_each_entry_safe(sc
, tmp
, &dss
->client_list
, node
)
73 send_chunk(sc
, dss
, DCCP_MAX_BYTES_PER_WRITE
, current_chunk
, buf
,
74 len
, header_buf
, header_len
);
77 static void dccp_shutdown_clients(void)
79 shutdown_clients(dss
);
82 static int dccp_com_on(__a_unused
struct sender_command_data
*scd
)
84 return generic_com_on(dss
, IPPROTO_DCCP
);
87 static int dccp_com_off(__a_unused
struct sender_command_data
*scd
)
94 static int dccp_com_deny(struct sender_command_data
*scd
)
96 generic_com_deny(scd
, dss
);
100 static int dccp_com_allow(struct sender_command_data
*scd
)
102 generic_com_allow(scd
, dss
);
106 static char *dccp_info(void)
108 return get_sender_info(dss
, "dccp");
112 * The init function of the dccp sender.
114 * \param s pointer to the dccp sender struct.
116 * It initializes all function pointers of \a s and starts
117 * listening on the given port.
119 void dccp_send_init(struct sender
*s
)
125 s
->pre_select
= dccp_pre_select
;
126 s
->post_select
= dccp_post_select
;
127 s
->shutdown_clients
= dccp_shutdown_clients
;
128 s
->help
= generic_sender_help
;
129 s
->client_cmds
[SENDER_ON
] = dccp_com_on
;
130 s
->client_cmds
[SENDER_OFF
] = dccp_com_off
;
131 s
->client_cmds
[SENDER_DENY
] = dccp_com_deny
;
132 s
->client_cmds
[SENDER_ALLOW
] = dccp_com_allow
;
133 s
->client_cmds
[SENDER_ADD
] = NULL
;
134 s
->client_cmds
[SENDER_DELETE
] = NULL
;
136 init_sender_status(dss
, conf
.dccp_access_arg
, conf
.dccp_access_given
,
137 conf
.dccp_port_arg
, conf
.dccp_max_clients_arg
,
138 conf
.dccp_default_deny_given
);
139 ret
= generic_com_on(dss
, IPPROTO_DCCP
);
141 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));