e83239d346bdcad9c97c7defb8874a68d9dcf997
2 * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file udp_send.c Para_server's udp sender. */
13 #include "server.cmdline.h"
23 #include "portable_io.h"
24 #include "udp_header.h"
28 #include "close_on_fork.h"
29 #include "chunk_queue.h"
31 /** Convert in_addr to ascii. */
32 #define TARGET_ADDR(oc) inet_ntoa((oc)->addr)
34 /** Describes one entry in the list of targets for the udp sender. */
38 /** The position of this target in the list of targets. */
39 struct list_head node
;
44 /** The list of queued chunks for this fd. */
45 struct chunk_queue
*cq
;
48 static struct list_head targets
;
49 static int sender_status
;
51 static void udp_close_target(struct udp_target
*ut
)
56 del_close_on_fork_list(ut
->fd
);
62 static void udp_delete_target(struct udp_target
*ut
, const char *msg
)
64 PARA_NOTICE_LOG("deleting %s:%d (%s) from list\n", TARGET_ADDR(ut
),
71 #define UDP_CQ_BYTES 40000
73 static int udp_init_session(struct udp_target
*ut
)
77 if (ut
->fd
>= 0) /* nothing to do */
79 ret
= create_udp_send_socket(TARGET_ADDR(ut
), ut
->port
,
84 ret
= mark_fd_nonblocking(ut
->fd
);
89 add_close_on_fork_list(ut
->fd
);
90 ut
->cq
= cq_new(UDP_CQ_BYTES
);
91 PARA_NOTICE_LOG("sending to udp %s:%d\n", TARGET_ADDR(ut
), ut
->port
);
95 static void udp_send_buf(char *buf
, size_t len
)
97 struct udp_target
*ut
, *tmp
;
100 list_for_each_entry_safe(ut
, tmp
, &targets
, node
) {
101 ret
= udp_init_session(ut
);
103 udp_delete_target(ut
, para_strerror(-ret
));
106 ret
= send_queued_chunks(ut
->fd
, ut
->cq
, 0);
108 udp_delete_target(ut
, para_strerror(-ret
));
113 if (!ret
) { /* still data left in the queue */
114 ret
= cq_enqueue(ut
->cq
, buf
, len
);
116 udp_delete_target(ut
, para_strerror(-ret
));
120 ret
= write_nonblock(ut
->fd
, buf
, len
, 0);
122 udp_delete_target(ut
, para_strerror(-ret
));
126 ret
= cq_enqueue(ut
->cq
, buf
+ ret
, len
- ret
);
128 udp_delete_target(ut
, para_strerror(-ret
));
135 static void udp_shutdown_targets(void)
137 char buf
[UDP_AUDIO_HEADER_LEN
];
138 struct udp_target
*ut
, *tmp
;
140 udp_write_packet_type(buf
, UDP_EOF_PACKET
);
141 udp_write_magic(buf
);
142 list_for_each_entry_safe(ut
, tmp
, &targets
, node
) {
145 write(ut
->fd
, buf
, UDP_AUDIO_HEADER_LEN
);
146 udp_close_target(ut
);
150 static int need_extra_header(long unsigned current_chunk
)
152 static struct timeval last_header
;
157 tv_diff(now
, &last_header
, &diff
);
158 if (tv2ms(&diff
) < conf
.udp_header_interval_arg
)
164 static void udp_send(long unsigned current_chunk
, __a_unused
long unsigned chunks_sent
,
165 const char *buf
, size_t len
, const char *header_buf
,
169 uint8_t packet_type
= UDP_DATA_PACKET
;
171 struct timeval
*chunk_tv
;
172 uint8_t stream_type
= header_len
? UDP_HEADER_STREAM
: UDP_PLAIN_STREAM
;
174 // PARA_NOTICE_LOG("len: %zd, header_len: %zd\n", len, header_len);
175 if (sender_status
!= SENDER_ON
)
178 /* we might not yet know the chunk time */
179 chunk_tv
= vss_chunk_time();
182 if (list_empty(&targets
))
184 if (!need_extra_header(current_chunk
))
187 packet_type
= UDP_BOF_PACKET
;
189 packet_type
= UDP_HEADER_PACKET
;
190 sendbuf_len
= UDP_AUDIO_HEADER_LEN
+ header_len
+ len
;
191 sendbuf
= para_malloc(sendbuf_len
);
192 udp_write_magic(sendbuf
);
193 udp_write_stream_type(sendbuf
, stream_type
);
194 udp_write_packet_type(sendbuf
, packet_type
);
195 udp_write_header_len(sendbuf
, header_len
);
197 memcpy(sendbuf
+ UDP_AUDIO_HEADER_LEN
, header_buf
,
199 memcpy(sendbuf
+ UDP_AUDIO_HEADER_LEN
+ header_len
, buf
, len
);
200 udp_send_buf(sendbuf
, sendbuf_len
);
204 static int udp_com_on(__a_unused
struct sender_command_data
*scd
)
206 sender_status
= SENDER_ON
;
210 static int udp_com_off(__a_unused
struct sender_command_data
*scd
)
212 udp_shutdown_targets();
213 sender_status
= SENDER_OFF
;
217 static int udp_com_delete(struct sender_command_data
*scd
)
219 char *a
= para_strdup(inet_ntoa(scd
->addr
));
220 struct udp_target
*ut
, *tmp
;
221 list_for_each_entry_safe(ut
, tmp
, &targets
, node
) {
222 if (scd
->port
!= ut
->port
)
224 if (strcmp(TARGET_ADDR(ut
), a
))
226 udp_delete_target(ut
, "com_delete");
231 static void udp_add_target(int port
, struct in_addr
*addr
)
233 struct udp_target
*ut
= para_calloc(sizeof(struct udp_target
));
236 ut
->fd
= -1; /* not yet connected */
237 PARA_INFO_LOG("adding to target list (%s:%d)\n",
238 TARGET_ADDR(ut
), ut
->port
);
239 para_list_add(&ut
->node
, &targets
);
242 static int udp_com_add(struct sender_command_data
*scd
)
244 int port
= (scd
->port
> 0)? scd
->port
: conf
.udp_default_port_arg
;
245 udp_add_target(port
, &scd
->addr
);
249 static char *udp_info(void)
251 struct udp_target
*ut
;
252 char *ret
, *tgts
= NULL
;
254 list_for_each_entry(ut
, &targets
, node
) {
255 char *tmp
= make_message("%s%s:%d ", tgts
? tgts
: "",
256 TARGET_ADDR(ut
), ut
->port
);
265 (sender_status
== SENDER_ON
)? "on" : "off",
266 conf
.udp_default_port_arg
,
267 tgts
? tgts
: "(none)"
273 static void udp_init_target_list(void)
277 INIT_LIST_HEAD(&targets
);
278 for (i
= 0; i
< conf
.udp_target_given
; i
++) {
279 char *arg
= para_strdup(conf
.udp_target_arg
[i
]);
280 char *p
= strchr(arg
, ':');
287 if (!inet_pton(AF_INET
, arg
, &addr
))
290 if (port
< 0 || port
> 65535)
291 port
= conf
.udp_default_port_arg
;
292 udp_add_target(port
, &addr
);
295 PARA_CRIT_LOG("syntax error for udp target option "
296 "#%d, ignoring\n", i
);
303 static char *udp_help(void)
307 "usage: {add|delete} IP port\n"
308 "example: add 224.0.1.38 8000 (multicast streaming)\n"
313 * The init function of para_server's udp sender.
315 * \param s Pointer to the http sender struct.
317 * It initializes all function pointers of \a s and the list of udp targets.
319 void udp_send_init(struct sender
*s
)
321 INIT_LIST_HEAD(&targets
);
325 s
->pre_select
= NULL
;
326 s
->post_select
= NULL
;
327 s
->shutdown_clients
= udp_shutdown_targets
;
328 s
->client_cmds
[SENDER_ON
] = udp_com_on
;
329 s
->client_cmds
[SENDER_OFF
] = udp_com_off
;
330 s
->client_cmds
[SENDER_DENY
] = NULL
;
331 s
->client_cmds
[SENDER_ALLOW
] = NULL
;
332 s
->client_cmds
[SENDER_ADD
] = udp_com_add
;
333 s
->client_cmds
[SENDER_DELETE
] = udp_com_delete
;
334 sender_status
= SENDER_OFF
;
335 udp_init_target_list();
336 if (!conf
.udp_no_autostart_given
)
337 sender_status
= SENDER_ON
;
338 PARA_DEBUG_LOG("udp sender init complete\n");