ortp_send.c

   1 /*
   2  * Copyright (C) 2005-2008 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 "list.h"
  21 #include "send.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 static int sender_status;
  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         size_t header_len = 0;
 167         int packet_type = ORTP_DATA;
 168         char *sendbuf, *header_buf = NULL;
 169         struct timeval *chunk_tv;
 170
 171         if (sender_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         sender_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         sender_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 sender:\n"
 272                 "\tstatus: %s\n"
 273                 "\tport: udp %d\n"
 274                 "\ttargets: %s\n",
 275                 (sender_status == SENDER_ON)? "on" : "off",
 276                 conf.ortp_default_port_arg,
 277                 tgts? tgts : "(none)"
 278         );
 279         free(tgts);
 280         return ret;
 281 }
 282
 283 static void ortp_init_target_list(void)
 284 {
 285         int i;
 286
 287         INIT_LIST_HEAD(&targets);
 288         for (i = 0; i < conf.ortp_target_given; i++) {
 289                 char *arg = para_strdup(conf.ortp_target_arg[i]);
 290                 char *p = strchr(arg, ':');
 291                 int port;
 292                 struct in_addr addr;
 293
 294                 if (!p)
 295                         goto err;
 296                 *p = '\0';
 297                 if (!inet_pton(AF_INET, arg, &addr))
 298                         goto err;
 299                 port = atoi(++p);
 300                 if (port < 0 || port > 65535)
 301                         port = conf.ortp_default_port_arg;
 302                 ortp_add_target(port, &addr);
 303                 goto success;
 304 err:
 305                 PARA_CRIT_LOG("syntax error for ortp_target option "
 306                         "#%d, ignoring\n", i);
 307 success:
 308                 free(arg);
 309                 continue;
 310         }
 311 }
 312
 313 static char *ortp_help(void)
 314 {
 315         return make_message(
 316                 "usage: {on|off}\n"
 317                 "usage: {add|delete} IP port\n"
 318                 "example: add 224.0.1.38 1500 (LAN-streaming)\n"
 319         );
 320 }
 321
 322 /**
 323  * the init function of para_server's ortp sender
 324  *
 325  * \param s pointer to the http sender struct
 326  *
 327  * It initializes all function pointers of \a s and the list of ortp targets.
 328  */
 329 void ortp_send_init(struct sender *s)
 330 {
 331         ortp_init();
 332         INIT_LIST_HEAD(&targets);
 333         s->info = ortp_info;
 334         s->help = ortp_help;
 335         s->send = ortp_send;
 336         s->pre_select = NULL;
 337         s->post_select = NULL;
 338         s->shutdown_clients = ortp_shutdown_targets;
 339         s->client_cmds[SENDER_ON] = ortp_com_on;
 340         s->client_cmds[SENDER_OFF] = ortp_com_off;
 341         s->client_cmds[SENDER_DENY] = NULL;
 342         s->client_cmds[SENDER_ALLOW] = NULL;
 343         s->client_cmds[SENDER_ADD] = ortp_com_add;
 344         s->client_cmds[SENDER_DELETE] = ortp_com_delete;
 345         self = s;
 346         sender_status = SENDER_OFF;
 347         ortp_init_target_list();
 348         if (!conf.ortp_no_autostart_given)
 349                 sender_status = SENDER_ON;
 350         PARA_DEBUG_LOG("ortp sender init complete\n");
 351 }