Make pass_afd() static.
[paraslash.git] / ortp_send.c
1 /*
2 * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file ortp_send.c para_server's ortp sender */
8
9 #include <ortp/ortp.h>
10 #include <ortp/port.h>
11
12 #include "server.cmdline.h"
13 #include "para.h"
14 #include "error.h"
15 #include "string.h"
16 #include "afh.h"
17 #include "afs.h"
18 #include "server.h"
19 #include "vss.h"
20 #include "send.h"
21 #include "list.h"
22 #include "ortp.h"
23
24 /** \cond convert in_addr to ascii */
25 #define TARGET_ADDR(oc) inet_ntoa((oc)->addr)
26 /** \endcond */
27
28 /** describes one entry in the list of targets for the ortp sender */
29 struct ortp_target {
30 /** address info */
31 struct in_addr addr;
32 /** whether the ortp sender is activated */
33 int status;
34 /** the ortp timestamp increases by this amount */
35 uint32_t chunk_ts;
36 /** the currently used timestamp for this target */
37 uint32_t last_ts;
38 /** the position of this target in the list of targets */
39 struct list_head node;
40 /** the UDP port */
41 int port;
42 /** non-zero if at least one chunk has been sent to this target */
43 int streaming;
44 /** the session pointer from libortp */
45 RtpSession *session;
46 };
47
48 static struct list_head targets;
49 static struct sender *self;
50
51 static void ortp_delete_target(struct ortp_target *ot, const char *msg)
52 {
53 PARA_NOTICE_LOG("deleting %s:%d (%s) from list\n", TARGET_ADDR(ot),
54 ot->port, msg);
55 if (ot->session) {
56 rtp_session_destroy(ot->session);
57 ot->session = NULL;
58 }
59 list_del(&ot->node);
60 free(ot);
61 }
62
63 static void ortp_send_buf(char *buf, size_t len, long unsigned chunks_sent)
64 {
65 struct ortp_target *ot, *tmp;
66 int ret, ortp_len = len; /* rtp_session_send_with_ts expects int */
67
68 if (ortp_len < 0)
69 return;
70 list_for_each_entry_safe(ot, tmp, &targets, node) {
71 uint32_t ts;
72 if (!ot->session)
73 continue;
74 WRITE_CHUNK_TS(buf, ot->chunk_ts);
75 ts = ot->chunk_ts * chunks_sent;
76 ret = rtp_session_send_with_ts(ot->session,
77 (unsigned char*)buf, ortp_len, ts);
78 ot->last_ts = ts;
79 if (ret < 0)
80 ortp_delete_target(ot, "send error");
81 if (ret != len + 12)
82 PARA_NOTICE_LOG("short write %d\n", ret);
83 }
84 }
85
86 static int set_multicast(RtpSession *s)
87 {
88 unsigned char loop = 1;
89 int ret;
90
91 ret = setsockopt(s->rtp.socket,
92 IPPROTO_IP, IP_MULTICAST_LOOP, &loop, sizeof(loop));
93 if (ret < 0) {
94 PARA_ERROR_LOG("IP_MULTICAST_LOOP error %d\n", ret);
95
96 }
97 return 1;
98 }
99
100 static void ortp_init_session(struct ortp_target *ot)
101 {
102 RtpSession *s;
103 int ret;
104
105 PARA_NOTICE_LOG("sending to udp %s:%d\n", TARGET_ADDR(ot), ot->port);
106 ot->session = rtp_session_new(RTP_SESSION_SENDONLY);
107 if (!ot->session)
108 return;
109 s = ot->session;
110 if (conf.ortp_jitter_compensation_arg) {
111 rtp_session_enable_adaptive_jitter_compensation(ot->session, TRUE);
112 rtp_session_set_jitter_compensation(ot->session,
113 conf.ortp_jitter_compensation_arg);
114 }
115 /* always successful */
116 rtp_session_set_send_payload_type(s, PAYLOAD_AUDIO_CONTINUOUS);
117 ret = rtp_session_set_remote_addr(s, TARGET_ADDR(ot), ot->port);
118 if (ret < 0) {
119 rtp_session_destroy(ot->session);
120 ot->session = NULL;
121 return;
122 }
123 set_multicast(s);
124 }
125
126 /* called by vss */
127 static void ortp_shutdown_targets(void)
128 {
129 unsigned char buf[ORTP_AUDIO_HEADER_LEN];
130 struct ortp_target *ot, *tmp;
131
132 WRITE_PACKET_TYPE(buf, ORTP_EOF);
133 list_for_each_entry_safe(ot, tmp, &targets, node) {
134 if (!ot->session || !ot->streaming)
135 continue;
136 PARA_INFO_LOG("sending eof to ortp target %s:%d, ts = %d\n",
137 TARGET_ADDR(ot), ot->port, ot->last_ts);
138 rtp_session_send_with_ts(ot->session, buf,
139 ORTP_AUDIO_HEADER_LEN, ot->last_ts);
140 ot->streaming = 0;
141 ot->chunk_ts = 0;
142 rtp_session_reset(ot->session);
143 }
144 }
145
146 static int need_extra_header(long unsigned current_chunk)
147 {
148 static struct timeval last_header;
149 struct timeval now, diff;
150
151 if (!current_chunk)
152 return 0;
153 gettimeofday(&now, NULL);
154 tv_diff(&now, &last_header, &diff);
155 if (tv2ms(&diff) < conf.ortp_header_interval_arg)
156 return 0;
157 last_header = now;
158 return 1;
159 }
160
161 static void ortp_send(long unsigned current_chunk, long unsigned chunks_sent,
162 const char *buf, size_t len)
163 {
164 struct ortp_target *ot, *tmp;
165 size_t sendbuf_len;
166 unsigned header_len = 0;
167 int packet_type = ORTP_DATA;
168 char *sendbuf, *header_buf = NULL;
169 struct timeval *chunk_tv;
170
171 if (self->status != SENDER_ON)
172 return;
173
174 // PARA_NOTICE_LOG("sending %lu\n", current_chunk);
175 chunk_tv = vss_chunk_time();
176 if (!chunk_tv)
177 return;
178 list_for_each_entry_safe(ot, tmp, &targets, node) {
179 if (!ot->session) {
180 ortp_init_session(ot);
181 if (!ot->session)
182 continue;
183 }
184 if (!ot->chunk_ts)
185 ot->chunk_ts = rtp_session_time_to_ts(ot->session,
186 (int)tv2ms(chunk_tv));
187 // PARA_DEBUG_LOG("len: %d, ts: %lu, ts: %d\n",
188 // len, ot->chunk_ts * chunks_sent, ot->chunk_ts);
189 ot->streaming = 1;
190 }
191 if (list_empty(&targets))
192 return;
193 header_buf = vss_get_header(&header_len);
194 if (!need_extra_header(current_chunk))
195 header_len = 0;
196 sendbuf_len = ORTP_AUDIO_HEADER_LEN + header_len + len;
197 sendbuf = para_malloc(sendbuf_len);
198 if (!current_chunk)
199 packet_type = ORTP_BOF;
200 else if (header_len)
201 packet_type = ORTP_HEADER;
202 WRITE_PACKET_TYPE(sendbuf, packet_type);
203 WRITE_CHUNK_TIME(sendbuf, chunk_tv->tv_usec);
204 WRITE_STREAM_TYPE(sendbuf, header_buf? 1 : 0);
205 WRITE_HEADER_LEN(sendbuf, header_len);
206 if (header_len)
207 memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN, header_buf,
208 header_len);
209 memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN + header_len, buf, len);
210 ortp_send_buf(sendbuf, sendbuf_len, chunks_sent);
211 free(sendbuf);
212 }
213
214 static int ortp_com_on(__a_unused struct sender_command_data *scd)
215 {
216
217 self->status = SENDER_ON;
218 return 1;
219 }
220
221 static int ortp_com_off(__a_unused struct sender_command_data *scd)
222 {
223 ortp_shutdown_targets();
224 self->status = SENDER_OFF;
225 return 1;
226 }
227
228 static int ortp_com_delete(struct sender_command_data *scd)
229 {
230 char *a = para_strdup(inet_ntoa(scd->addr));
231 struct ortp_target *ot, *tmp;
232 list_for_each_entry_safe(ot, tmp, &targets, node) {
233 if (scd->port != ot->port)
234 continue;
235 if (strcmp(TARGET_ADDR(ot), a))
236 continue;
237 ortp_delete_target(ot, "com_delete");
238 }
239 return 1;
240 }
241
242 static void ortp_add_target(int port, struct in_addr *addr)
243 {
244 struct ortp_target *ot = para_calloc(sizeof(struct ortp_target));
245 ot->port = port;
246 ot->addr = *addr;
247 PARA_INFO_LOG("adding to target list (%s:%d)\n",
248 TARGET_ADDR(ot), ot->port);
249 para_list_add(&ot->node, &targets);
250 }
251
252 static int ortp_com_add(struct sender_command_data *scd)
253 {
254 int port = (scd->port > 0)? scd->port : conf.ortp_default_port_arg;
255 ortp_add_target(port, &scd->addr);
256 return 1;
257 }
258
259 static char *ortp_info(void)
260 {
261 struct ortp_target *ot;
262 char *ret, *tgts = NULL;
263
264 list_for_each_entry(ot, &targets, node) {
265 char *tmp = make_message("%s%s:%d ", tgts? tgts : "",
266 TARGET_ADDR(ot), ot->port);
267 free(tgts);
268 tgts = tmp;
269 }
270 ret = make_message(
271 "ortp status: %s\n"
272 "ortp default port: udp %d\n"
273 "ortp targets: %s\n",
274 (self->status == SENDER_ON)? "on" : "off",
275 conf.ortp_default_port_arg,
276 tgts? tgts : "(none)"
277 );
278 free(tgts);
279 return ret;
280 }
281
282 static void ortp_init_target_list(void)
283 {
284 int i;
285
286 INIT_LIST_HEAD(&targets);
287 for (i = 0; i < conf.ortp_target_given; i++) {
288 char *arg = para_strdup(conf.ortp_target_arg[i]);
289 char *p = strchr(arg, ':');
290 int port;
291 struct in_addr addr;
292
293 if (!p)
294 goto err;
295 *p = '\0';
296 if (!inet_pton(AF_INET, arg, &addr))
297 goto err;
298 port = atoi(++p);
299 if (port < 0 || port > 65535)
300 port = conf.ortp_default_port_arg;
301 ortp_add_target(port, &addr);
302 goto success;
303 err:
304 PARA_CRIT_LOG("syntax error for ortp_target option "
305 "#%d, ignoring\n", i);
306 success:
307 free(arg);
308 continue;
309 }
310 }
311
312 static void ortp_pre_select(__a_unused int *max_fileno, __a_unused fd_set *rfds,
313 __a_unused fd_set *wfds)
314 {
315 return;
316 }
317
318 static char *ortp_help(void)
319 {
320 return make_message(
321 "usage: {on|off}\n"
322 "usage: {add|delete} IP port\n"
323 "example: add 224.0.1.38 1500 (LAN-streaming)\n"
324 );
325 }
326
327 /**
328 * the init function of para_server's ortp sender
329 *
330 * \param s pointer to the http sender struct
331 *
332 * It initializes all function pointers of \a s and the list of ortp targets.
333 */
334 void ortp_send_init(struct sender *s)
335 {
336 ortp_init();
337 INIT_LIST_HEAD(&targets);
338 s->info = ortp_info;
339 s->help = ortp_help;
340 s->send = ortp_send;
341 s->pre_select = ortp_pre_select;
342 s->post_select = NULL;
343 s->shutdown_clients = ortp_shutdown_targets;
344 s->client_cmds[SENDER_ON] = ortp_com_on;
345 s->client_cmds[SENDER_OFF] = ortp_com_off;
346 s->client_cmds[SENDER_DENY] = NULL;
347 s->client_cmds[SENDER_ALLOW] = NULL;
348 s->client_cmds[SENDER_ADD] = ortp_com_add;
349 s->client_cmds[SENDER_DELETE] = ortp_com_delete;
350 self = s;
351 s->status = SENDER_OFF;
352 ortp_init_target_list();
353 if (!conf.ortp_no_autostart_given)
354 s->status = SENDER_ON;
355 PARA_DEBUG_LOG("%s", "ortp sender init complete\n");
356 }