1408ae7f251bc4fe0c4e79e67e00dc7914d0b91b
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 static void udp_send_buf(char *buf
, size_t len
)
73 struct udp_target
*ut
, *tmp
;
76 list_for_each_entry_safe(ut
, tmp
, &targets
, node
) {
79 ret
= send_queued_chunks(ut
->fd
, ut
->cq
, 0);
81 udp_delete_target(ut
, para_strerror(-ret
));
86 if (!ret
) { /* still data left in the queue */
87 ret
= cq_enqueue(ut
->cq
, buf
, len
);
89 udp_delete_target(ut
, para_strerror(-ret
));
93 ret
= write_nonblock(ut
->fd
, buf
, len
, 0);
95 udp_delete_target(ut
, para_strerror(-ret
));
99 ret
= cq_enqueue(ut
->cq
, buf
+ ret
, len
- ret
);
101 udp_delete_target(ut
, para_strerror(-ret
));
108 #define UDP_CQ_BYTES 40000
110 static int udp_init_session(struct udp_target
*ut
)
114 if (ut
->fd
>= 0) /* nothing to do */
116 PARA_NOTICE_LOG("sending to udp %s:%d\n", TARGET_ADDR(ut
), ut
->port
);
117 ret
= create_udp_send_socket(TARGET_ADDR(ut
), ut
->port
,
122 ret
= mark_fd_nonblocking(ut
->fd
);
127 add_close_on_fork_list(ut
->fd
);
128 ut
->cq
= cq_new(UDP_CQ_BYTES
);
132 static void udp_shutdown_targets(void)
134 char buf
[UDP_AUDIO_HEADER_LEN
];
135 struct udp_target
*ut
, *tmp
;
137 udp_write_packet_type(buf
, UDP_EOF_PACKET
);
138 udp_write_magic(buf
);
139 list_for_each_entry_safe(ut
, tmp
, &targets
, node
) {
142 write(ut
->fd
, buf
, UDP_AUDIO_HEADER_LEN
);
143 udp_close_target(ut
);
147 static int need_extra_header(long unsigned current_chunk
)
149 static struct timeval last_header
;
154 tv_diff(now
, &last_header
, &diff
);
155 if (tv2ms(&diff
) < conf
.udp_header_interval_arg
)
161 static void udp_send(long unsigned current_chunk
, __a_unused
long unsigned chunks_sent
,
162 const char *buf
, size_t len
, const char *header_buf
,
165 struct udp_target
*ut
, *tmp
;
167 uint8_t packet_type
= UDP_DATA_PACKET
;
170 struct timeval
*chunk_tv
;
171 uint8_t stream_type
= header_len
? UDP_HEADER_STREAM
: UDP_PLAIN_STREAM
;
173 // PARA_NOTICE_LOG("header_len: %zd, header_buf: %p\n", 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 list_for_each_entry_safe(ut
, tmp
, &targets
, node
) {
185 ret
= udp_init_session(ut
);
187 udp_delete_target(ut
, para_strerror(-ret
));
189 if (!need_extra_header(current_chunk
))
192 packet_type
= UDP_BOF_PACKET
;
194 packet_type
= UDP_HEADER_PACKET
;
195 sendbuf_len
= UDP_AUDIO_HEADER_LEN
+ header_len
+ len
;
196 sendbuf
= para_malloc(sendbuf_len
);
197 udp_write_magic(sendbuf
);
198 udp_write_stream_type(sendbuf
, stream_type
);
199 udp_write_packet_type(sendbuf
, packet_type
);
200 udp_write_header_len(sendbuf
, header_len
);
202 memcpy(sendbuf
+ UDP_AUDIO_HEADER_LEN
, header_buf
,
204 memcpy(sendbuf
+ UDP_AUDIO_HEADER_LEN
+ header_len
, buf
, len
);
205 udp_send_buf(sendbuf
, sendbuf_len
);
209 static int udp_com_on(__a_unused
struct sender_command_data
*scd
)
211 sender_status
= SENDER_ON
;
215 static int udp_com_off(__a_unused
struct sender_command_data
*scd
)
217 udp_shutdown_targets();
218 sender_status
= SENDER_OFF
;
222 static int udp_com_delete(struct sender_command_data
*scd
)
224 char *a
= para_strdup(inet_ntoa(scd
->addr
));
225 struct udp_target
*ut
, *tmp
;
226 list_for_each_entry_safe(ut
, tmp
, &targets
, node
) {
227 if (scd
->port
!= ut
->port
)
229 if (strcmp(TARGET_ADDR(ut
), a
))
231 udp_delete_target(ut
, "com_delete");
236 static void udp_add_target(int port
, struct in_addr
*addr
)
238 struct udp_target
*ut
= para_calloc(sizeof(struct udp_target
));
241 ut
->fd
= -1; /* not yet connected */
242 PARA_INFO_LOG("adding to target list (%s:%d)\n",
243 TARGET_ADDR(ut
), ut
->port
);
244 para_list_add(&ut
->node
, &targets
);
247 static int udp_com_add(struct sender_command_data
*scd
)
249 int port
= (scd
->port
> 0)? scd
->port
: conf
.udp_default_port_arg
;
250 udp_add_target(port
, &scd
->addr
);
254 static char *udp_info(void)
256 struct udp_target
*ut
;
257 char *ret
, *tgts
= NULL
;
259 list_for_each_entry(ut
, &targets
, node
) {
260 char *tmp
= make_message("%s%s:%d ", tgts
? tgts
: "",
261 TARGET_ADDR(ut
), ut
->port
);
270 (sender_status
== SENDER_ON
)? "on" : "off",
271 conf
.udp_default_port_arg
,
272 tgts
? tgts
: "(none)"
278 static void udp_init_target_list(void)
282 INIT_LIST_HEAD(&targets
);
283 for (i
= 0; i
< conf
.udp_target_given
; i
++) {
284 char *arg
= para_strdup(conf
.udp_target_arg
[i
]);
285 char *p
= strchr(arg
, ':');
292 if (!inet_pton(AF_INET
, arg
, &addr
))
295 if (port
< 0 || port
> 65535)
296 port
= conf
.udp_default_port_arg
;
297 udp_add_target(port
, &addr
);
300 PARA_CRIT_LOG("syntax error for udp target option "
301 "#%d, ignoring\n", i
);
308 static char *udp_help(void)
312 "usage: {add|delete} IP port\n"
313 "example: add 224.0.1.38 8000 (multicast streaming)\n"
318 * The init function of para_server's udp sender.
320 * \param s Pointer to the http sender struct.
322 * It initializes all function pointers of \a s and the list of udp targets.
324 void udp_send_init(struct sender
*s
)
326 INIT_LIST_HEAD(&targets
);
330 s
->pre_select
= NULL
;
331 s
->post_select
= NULL
;
332 s
->shutdown_clients
= udp_shutdown_targets
;
333 s
->client_cmds
[SENDER_ON
] = udp_com_on
;
334 s
->client_cmds
[SENDER_OFF
] = udp_com_off
;
335 s
->client_cmds
[SENDER_DENY
] = NULL
;
336 s
->client_cmds
[SENDER_ALLOW
] = NULL
;
337 s
->client_cmds
[SENDER_ADD
] = udp_com_add
;
338 s
->client_cmds
[SENDER_DELETE
] = udp_com_delete
;
339 sender_status
= SENDER_OFF
;
340 udp_init_target_list();
341 if (!conf
.udp_no_autostart_given
)
342 sender_status
= SENDER_ON
;
343 PARA_DEBUG_LOG("udp sender init complete\n");