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 /** The maximal size of the per-target chunk queue. */
72 #define UDP_CQ_BYTES 40000
74 static int udp_init_session(struct udp_target *ut)
78 if (ut->fd >= 0) /* nothing to do */
80 ret = create_udp_send_socket(TARGET_ADDR(ut), ut->port,
85 ret = mark_fd_nonblocking(ut->fd);
90 add_close_on_fork_list(ut->fd);
91 ut->cq = cq_new(UDP_CQ_BYTES);
92 PARA_NOTICE_LOG("sending to udp %s:%d\n", TARGET_ADDR(ut), ut->port);
96 static void udp_send_buf(char *buf, size_t len)
98 struct udp_target *ut, *tmp;
101 list_for_each_entry_safe(ut, tmp, &targets, node) {
102 ret = udp_init_session(ut);
104 udp_delete_target(ut, para_strerror(-ret));
107 ret = send_queued_chunks(ut->fd, ut->cq, 0);
109 udp_delete_target(ut, para_strerror(-ret));
114 if (!ret) { /* still data left in the queue */
115 ret = cq_enqueue(ut->cq, buf, len);
117 udp_delete_target(ut, para_strerror(-ret));
121 ret = write_nonblock(ut->fd, buf, len, 0);
123 udp_delete_target(ut, para_strerror(-ret));
127 ret = cq_enqueue(ut->cq, buf + ret, len - ret);
129 udp_delete_target(ut, para_strerror(-ret));
136 static void udp_shutdown_targets(void)
138 char buf[UDP_AUDIO_HEADER_LEN];
139 struct udp_target *ut, *tmp;
140 struct udp_audio_header uah = {
141 .stream_type = UDP_UNKNOWN_STREAM,
142 .packet_type = UDP_EOF_PACKET,
145 write_udp_audio_header(buf, &uah);
146 list_for_each_entry_safe(ut, tmp, &targets, node) {
149 write(ut->fd, buf, UDP_AUDIO_HEADER_LEN);
150 udp_close_target(ut);
154 static int need_extra_header(long unsigned current_chunk)
156 static struct timeval last_header;
161 tv_diff(now, &last_header, &diff);
162 if (tv2ms(&diff) < conf.udp_header_interval_arg)
168 static void udp_send(long unsigned current_chunk, __a_unused long unsigned chunks_sent,
169 const char *buf, size_t len, const char *header_buf,
174 struct timeval *chunk_tv;
175 struct udp_audio_header uah;
177 // PARA_NOTICE_LOG("len: %zd, header_len: %zd\n", len, header_len);
178 if (sender_status != SENDER_ON)
181 /* we might not yet know the chunk time */
182 chunk_tv = vss_chunk_time();
185 if (list_empty(&targets))
187 uah.stream_type = header_len? UDP_HEADER_STREAM : UDP_PLAIN_STREAM;
188 uah.header_len = need_extra_header(current_chunk)? header_len : 0;
190 uah.packet_type = UDP_BOF_PACKET;
191 else if (uah.header_len)
192 uah.packet_type = UDP_HEADER_PACKET;
194 uah.packet_type = UDP_DATA_PACKET;
195 uah.payload_len = uah.header_len + len;
196 sendbuf_len = UDP_AUDIO_HEADER_LEN + uah.payload_len;
197 sendbuf = para_malloc(sendbuf_len);
198 write_udp_audio_header(sendbuf, &uah);
200 memcpy(sendbuf + UDP_AUDIO_HEADER_LEN, header_buf,
202 memcpy(sendbuf + UDP_AUDIO_HEADER_LEN + uah.header_len, buf, len);
203 udp_send_buf(sendbuf, sendbuf_len);
207 static int udp_com_on(__a_unused struct sender_command_data *scd)
209 sender_status = SENDER_ON;
213 static int udp_com_off(__a_unused struct sender_command_data *scd)
215 udp_shutdown_targets();
216 sender_status = SENDER_OFF;
220 static int udp_com_delete(struct sender_command_data *scd)
222 char *a = para_strdup(inet_ntoa(scd->addr));
223 struct udp_target *ut, *tmp;
224 list_for_each_entry_safe(ut, tmp, &targets, node) {
225 if (scd->port != ut->port)
227 if (strcmp(TARGET_ADDR(ut), a))
229 udp_delete_target(ut, "com_delete");
234 static void udp_add_target(int port, struct in_addr *addr)
236 struct udp_target *ut = para_calloc(sizeof(struct udp_target));
239 ut->fd = -1; /* not yet connected */
240 PARA_INFO_LOG("adding to target list (%s:%d)\n",
241 TARGET_ADDR(ut), ut->port);
242 para_list_add(&ut->node, &targets);
245 static int udp_com_add(struct sender_command_data *scd)
247 int port = (scd->port > 0)? scd->port : conf.udp_default_port_arg;
248 udp_add_target(port, &scd->addr);
252 static char *udp_info(void)
254 struct udp_target *ut;
255 char *ret, *tgts = NULL;
257 list_for_each_entry(ut, &targets, node) {
258 char *tmp = make_message("%s%s:%d ", tgts? tgts : "",
259 TARGET_ADDR(ut), ut->port);
268 (sender_status == SENDER_ON)? "on" : "off",
269 conf.udp_default_port_arg,
270 tgts? tgts : "(none)"
276 static void udp_init_target_list(void)
280 INIT_LIST_HEAD(&targets);
281 for (i = 0; i < conf.udp_target_given; i++) {
282 char *arg = para_strdup(conf.udp_target_arg[i]);
283 char *p = strchr(arg, ':');
290 if (!inet_pton(AF_INET, arg, &addr))
293 if (port < 0 || port > 65535)
294 port = conf.udp_default_port_arg;
295 udp_add_target(port, &addr);
298 PARA_CRIT_LOG("syntax error for udp target option "
299 "#%d, ignoring\n", i);
306 static char *udp_help(void)
310 "usage: {add|delete} IP port\n"
311 "example: add 224.0.1.38 8000 (multicast streaming)\n"
316 * The init function of para_server's udp sender.
318 * \param s Pointer to the http sender struct.
320 * It initializes all function pointers of \a s and the list of udp targets.
322 void udp_send_init(struct sender *s)
324 INIT_LIST_HEAD(&targets);
328 s->pre_select = NULL;
329 s->post_select = NULL;
330 s->shutdown_clients = udp_shutdown_targets;
331 s->client_cmds[SENDER_ON] = udp_com_on;
332 s->client_cmds[SENDER_OFF] = udp_com_off;
333 s->client_cmds[SENDER_DENY] = NULL;
334 s->client_cmds[SENDER_ALLOW] = NULL;
335 s->client_cmds[SENDER_ADD] = udp_com_add;
336 s->client_cmds[SENDER_DELETE] = udp_com_delete;
337 sender_status = SENDER_OFF;
338 udp_init_target_list();
339 if (!conf.udp_no_autostart_given)
340 sender_status = SENDER_ON;
341 PARA_DEBUG_LOG("udp sender init complete\n");