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