2 * Copyright (C) 2006-2008 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>
28 #include "close_on_fork.h"
29 #include "chunk_queue.h"
30 #include "server.cmdline.h"
33 /** Do not write more than that many bytes at once. */
34 #define DCCP_MAX_BYTES_PER_WRITE 1024
36 static struct sender_status dccp_sender_status
, *dss
= &dccp_sender_status
;
38 static void dccp_pre_select(int *max_fileno
, fd_set
*rfds
,
39 __a_unused fd_set
*wfds
)
41 if (dss
->listen_fd
>= 0)
42 para_fd_set(dss
->listen_fd
, rfds
, max_fileno
);
45 static void dccp_post_select(fd_set
*rfds
, __a_unused fd_set
*wfds
)
47 struct sender_client
*sc
;
49 if (dss
->listen_fd
< 0 || !FD_ISSET(dss
->listen_fd
, rfds
))
51 sc
= accept_sender_client(dss
);
55 * Bypass unused CCID paths: the sender does not receive application data
56 * from the client; by shutting down this unused communication path we can
57 * reduce processing costs a bit. See analogous comment in dccp_recv.c.
59 if (shutdown(sc
->fd
, SHUT_RD
) >= 0)
61 PARA_WARNING_LOG("%s\n", strerror(errno
));
62 shutdown_client(sc
, dss
);
65 static void dccp_send(long unsigned current_chunk
,
66 __a_unused
long unsigned chunks_sent
, const char *buf
, size_t len
)
68 struct sender_client
*sc
, *tmp
;
70 list_for_each_entry_safe(sc
, tmp
, &dss
->client_list
, node
)
71 send_chunk(sc
, dss
, DCCP_MAX_BYTES_PER_WRITE
, current_chunk
, buf
,
75 static void dccp_shutdown_clients(void)
77 shutdown_clients(dss
);
80 static int dccp_com_on(__a_unused
struct sender_command_data
*scd
)
82 return generic_com_on(dss
, IPPROTO_DCCP
);
85 static int dccp_com_off(__a_unused
struct sender_command_data
*scd
)
92 static int dccp_com_deny(struct sender_command_data
*scd
)
94 generic_com_deny(scd
, dss
);
98 static int dccp_com_allow(struct sender_command_data
*scd
)
100 generic_com_allow(scd
, dss
);
104 static char *dccp_info(void)
106 return get_sender_info(dss
, "dccp");
110 * The init function of the dccp sender.
112 * \param s pointer to the dccp sender struct.
114 * It initializes all function pointers of \a s and starts
115 * listening on the given port.
117 void dccp_send_init(struct sender
*s
)
123 s
->pre_select
= dccp_pre_select
;
124 s
->post_select
= dccp_post_select
;
125 s
->shutdown_clients
= dccp_shutdown_clients
;
126 s
->help
= generic_sender_help
;
127 s
->client_cmds
[SENDER_ON
] = dccp_com_on
;
128 s
->client_cmds
[SENDER_OFF
] = dccp_com_off
;
129 s
->client_cmds
[SENDER_DENY
] = dccp_com_deny
;
130 s
->client_cmds
[SENDER_ALLOW
] = dccp_com_allow
;
131 s
->client_cmds
[SENDER_ADD
] = NULL
;
132 s
->client_cmds
[SENDER_DELETE
] = NULL
;
134 init_sender_status(dss
, conf
.dccp_access_arg
, conf
.dccp_access_given
,
135 conf
.dccp_port_arg
, conf
.dccp_max_clients_arg
,
136 conf
.dccp_default_deny_given
);
137 ret
= generic_com_on(dss
, IPPROTO_DCCP
);
139 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));