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>
15 #include <sys/types.h>
30 #include "close_on_fork.h"
31 #include "chunk_queue.h"
32 #include "server.cmdline.h"
35 /** Do not write more than that many bytes at once. */
36 #define DCCP_MAX_BYTES_PER_WRITE 1024
38 static struct sender_status dccp_sender_status
, *dss
= &dccp_sender_status
;
40 static void dccp_pre_select(int *max_fileno
, fd_set
*rfds
,
41 __a_unused fd_set
*wfds
)
43 if (dss
->listen_fd
>= 0)
44 para_fd_set(dss
->listen_fd
, rfds
, max_fileno
);
47 static void dccp_post_select(fd_set
*rfds
, __a_unused fd_set
*wfds
)
49 struct sender_client
*sc
;
51 if (dss
->listen_fd
< 0 || !FD_ISSET(dss
->listen_fd
, rfds
))
53 sc
= accept_sender_client(dss
);
57 * Bypass unused CCID paths: the sender does not receive application data
58 * from the client; by shutting down this unused communication path we can
59 * reduce processing costs a bit. See analogous comment in dccp_recv.c.
61 if (shutdown(sc
->fd
, SHUT_RD
) >= 0)
63 PARA_WARNING_LOG("%s\n", strerror(errno
));
64 shutdown_client(sc
, dss
);
67 static void dccp_send(long unsigned current_chunk
,
68 __a_unused
long unsigned chunks_sent
, const char *buf
,
69 size_t len
, const char *header_buf
, size_t header_len
)
71 struct sender_client
*sc
, *tmp
;
73 list_for_each_entry_safe(sc
, tmp
, &dss
->client_list
, node
)
74 send_chunk(sc
, dss
, DCCP_MAX_BYTES_PER_WRITE
, current_chunk
, buf
,
75 len
, header_buf
, header_len
);
78 static void dccp_shutdown_clients(void)
80 shutdown_clients(dss
);
83 static int dccp_com_on(__a_unused
struct sender_command_data
*scd
)
85 return generic_com_on(dss
, IPPROTO_DCCP
);
88 static int dccp_com_off(__a_unused
struct sender_command_data
*scd
)
95 static int dccp_com_deny(struct sender_command_data
*scd
)
97 generic_com_deny(scd
, dss
);
101 static int dccp_com_allow(struct sender_command_data
*scd
)
103 generic_com_allow(scd
, dss
);
107 static char *dccp_info(void)
109 return get_sender_info(dss
, "dccp");
113 * The init function of the dccp sender.
115 * \param s pointer to the dccp sender struct.
117 * It initializes all function pointers of \a s and starts
118 * listening on the given port.
120 void dccp_send_init(struct sender
*s
)
126 s
->pre_select
= dccp_pre_select
;
127 s
->post_select
= dccp_post_select
;
128 s
->shutdown_clients
= dccp_shutdown_clients
;
129 s
->help
= generic_sender_help
;
130 s
->client_cmds
[SENDER_ON
] = dccp_com_on
;
131 s
->client_cmds
[SENDER_OFF
] = dccp_com_off
;
132 s
->client_cmds
[SENDER_DENY
] = dccp_com_deny
;
133 s
->client_cmds
[SENDER_ALLOW
] = dccp_com_allow
;
134 s
->client_cmds
[SENDER_ADD
] = NULL
;
135 s
->client_cmds
[SENDER_DELETE
] = NULL
;
137 init_sender_status(dss
, conf
.dccp_access_arg
, conf
.dccp_access_given
,
138 conf
.dccp_port_arg
, conf
.dccp_max_clients_arg
,
139 conf
.dccp_default_deny_given
);
140 ret
= generic_com_on(dss
, IPPROTO_DCCP
);
142 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));