8bbcbae7fa611473d1abd67a65d70506380aa8a5
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"
30 /** Convert in_addr to ascii. */
31 #define TARGET_ADDR(oc) inet_ntoa((oc)->addr)
33 /** Describes one entry in the list of targets for the udp sender. */
37 /** The position of this target in the list of targets. */
38 struct list_head node
;
45 static struct list_head targets
;
46 static int sender_status
;
48 static void udp_delete_target(struct udp_target
*ut
, const char *msg
)
50 PARA_NOTICE_LOG("deleting %s:%d (%s) from list\n", TARGET_ADDR(ut
),
58 static void udp_send_buf(char *buf
, size_t len
)
60 struct udp_target
*ut
, *tmp
;
63 list_for_each_entry_safe(ut
, tmp
, &targets
, node
) {
66 ret
= write_nonblock(ut
->fd
, buf
, len
, len
);
67 if (ret
< 0) /* TODO: Use chunk queueing */
68 return udp_delete_target(ut
, "send error");
70 PARA_WARNING_LOG("short write %zu/%zu\n", ret
, len
);
74 static int udp_init_session(struct udp_target
*ut
)
78 if (ut
->fd
>= 0) /* nothing to do */
80 PARA_NOTICE_LOG("sending to udp %s:%d\n", TARGET_ADDR(ut
), ut
->port
);
81 ret
= create_udp_send_socket(TARGET_ADDR(ut
), ut
->port
,
86 ret
= mark_fd_nonblocking(ut
->fd
);
92 static void udp_shutdown_targets(void)
94 char buf
[UDP_AUDIO_HEADER_LEN
];
95 struct udp_target
*ut
, *tmp
;
97 udp_write_packet_type(buf
, UDP_EOF_PACKET
);
99 list_for_each_entry_safe(ut
, tmp
, &targets
, node
) {
102 write(ut
->fd
, buf
, UDP_AUDIO_HEADER_LEN
);
108 static int need_extra_header(long unsigned current_chunk
)
110 static struct timeval last_header
;
115 tv_diff(now
, &last_header
, &diff
);
116 if (tv2ms(&diff
) < conf
.udp_header_interval_arg
)
122 static void udp_send(long unsigned current_chunk
, __a_unused
long unsigned chunks_sent
,
123 const char *buf
, size_t len
, const char *header_buf
,
126 struct udp_target
*ut
, *tmp
;
128 uint8_t packet_type
= UDP_DATA_PACKET
;
131 struct timeval
*chunk_tv
;
132 uint8_t stream_type
= header_len
? UDP_HEADER_STREAM
: UDP_PLAIN_STREAM
;
134 // PARA_NOTICE_LOG("header_len: %zd, header_buf: %p\n", header_len,
136 if (sender_status
!= SENDER_ON
)
139 /* we might not yet know the chunk time */
140 chunk_tv
= vss_chunk_time();
143 if (list_empty(&targets
))
145 list_for_each_entry_safe(ut
, tmp
, &targets
, node
) {
146 ret
= udp_init_session(ut
);
148 udp_delete_target(ut
, para_strerror(-ret
));
150 if (!need_extra_header(current_chunk
))
153 packet_type
= UDP_BOF_PACKET
;
155 packet_type
= UDP_HEADER_PACKET
;
156 sendbuf_len
= UDP_AUDIO_HEADER_LEN
+ header_len
+ len
;
157 sendbuf
= para_malloc(sendbuf_len
);
158 udp_write_magic(sendbuf
);
159 udp_write_stream_type(sendbuf
, stream_type
);
160 udp_write_packet_type(sendbuf
, packet_type
);
161 udp_write_header_len(sendbuf
, header_len
);
163 memcpy(sendbuf
+ UDP_AUDIO_HEADER_LEN
, header_buf
,
165 memcpy(sendbuf
+ UDP_AUDIO_HEADER_LEN
+ header_len
, buf
, len
);
166 udp_send_buf(sendbuf
, sendbuf_len
);
170 static int udp_com_on(__a_unused
struct sender_command_data
*scd
)
172 sender_status
= SENDER_ON
;
176 static int udp_com_off(__a_unused
struct sender_command_data
*scd
)
178 udp_shutdown_targets();
179 sender_status
= SENDER_OFF
;
183 static int udp_com_delete(struct sender_command_data
*scd
)
185 char *a
= para_strdup(inet_ntoa(scd
->addr
));
186 struct udp_target
*ut
, *tmp
;
187 list_for_each_entry_safe(ut
, tmp
, &targets
, node
) {
188 if (scd
->port
!= ut
->port
)
190 if (strcmp(TARGET_ADDR(ut
), a
))
192 udp_delete_target(ut
, "com_delete");
197 static void udp_add_target(int port
, struct in_addr
*addr
)
199 struct udp_target
*ut
= para_calloc(sizeof(struct udp_target
));
202 ut
->fd
= -1; /* not yet connected */
203 PARA_INFO_LOG("adding to target list (%s:%d)\n",
204 TARGET_ADDR(ut
), ut
->port
);
205 para_list_add(&ut
->node
, &targets
);
208 static int udp_com_add(struct sender_command_data
*scd
)
210 int port
= (scd
->port
> 0)? scd
->port
: conf
.udp_default_port_arg
;
211 udp_add_target(port
, &scd
->addr
);
215 static char *udp_info(void)
217 struct udp_target
*ut
;
218 char *ret
, *tgts
= NULL
;
220 list_for_each_entry(ut
, &targets
, node
) {
221 char *tmp
= make_message("%s%s:%d ", tgts
? tgts
: "",
222 TARGET_ADDR(ut
), ut
->port
);
231 (sender_status
== SENDER_ON
)? "on" : "off",
232 conf
.udp_default_port_arg
,
233 tgts
? tgts
: "(none)"
239 static void udp_init_target_list(void)
243 INIT_LIST_HEAD(&targets
);
244 for (i
= 0; i
< conf
.udp_target_given
; i
++) {
245 char *arg
= para_strdup(conf
.udp_target_arg
[i
]);
246 char *p
= strchr(arg
, ':');
253 if (!inet_pton(AF_INET
, arg
, &addr
))
256 if (port
< 0 || port
> 65535)
257 port
= conf
.udp_default_port_arg
;
258 udp_add_target(port
, &addr
);
261 PARA_CRIT_LOG("syntax error for udp target option "
262 "#%d, ignoring\n", i
);
269 static char *udp_help(void)
273 "usage: {add|delete} IP port\n"
274 "example: add 224.0.1.38 8000 (multicast streaming)\n"
279 * The init function of para_server's udp sender.
281 * \param s Pointer to the http sender struct.
283 * It initializes all function pointers of \a s and the list of udp targets.
285 void udp_send_init(struct sender
*s
)
287 INIT_LIST_HEAD(&targets
);
291 s
->pre_select
= NULL
;
292 s
->post_select
= NULL
;
293 s
->shutdown_clients
= udp_shutdown_targets
;
294 s
->client_cmds
[SENDER_ON
] = udp_com_on
;
295 s
->client_cmds
[SENDER_OFF
] = udp_com_off
;
296 s
->client_cmds
[SENDER_DENY
] = NULL
;
297 s
->client_cmds
[SENDER_ALLOW
] = NULL
;
298 s
->client_cmds
[SENDER_ADD
] = udp_com_add
;
299 s
->client_cmds
[SENDER_DELETE
] = udp_com_delete
;
300 sender_status
= SENDER_OFF
;
301 udp_init_target_list();
302 if (!conf
.udp_no_autostart_given
)
303 sender_status
= SENDER_ON
;
304 PARA_DEBUG_LOG("udp sender init complete\n");