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) {
67 ret = write_all(ut->fd, buf, &written);
68 if (ret < 0) /* TODO: Use chunk queueing */
69 return udp_delete_target(ut, "send error");
71 PARA_WARNING_LOG("short write %zu/%zu\n", written, len);
75 static int udp_init_session(struct udp_target *ut)
79 if (ut->fd >= 0) /* nothing to do */
81 PARA_NOTICE_LOG("sending to udp %s:%d\n", TARGET_ADDR(ut), ut->port);
82 ret = create_udp_send_socket(TARGET_ADDR(ut), ut->port,
87 return mark_fd_nonblocking(ut->fd);
90 static void udp_shutdown_targets(void)
92 char buf[UDP_AUDIO_HEADER_LEN];
93 struct udp_target *ut, *tmp;
95 udp_write_packet_type(buf, UDP_EOF_PACKET);
97 list_for_each_entry_safe(ut, tmp, &targets, node) {
100 write(ut->fd, buf, UDP_AUDIO_HEADER_LEN);
106 static int need_extra_header(long unsigned current_chunk)
108 static struct timeval last_header;
113 tv_diff(now, &last_header, &diff);
114 if (tv2ms(&diff) < conf.udp_header_interval_arg)
120 static void udp_send(long unsigned current_chunk, __a_unused long unsigned chunks_sent,
121 const char *buf, size_t len, const char *header_buf,
124 struct udp_target *ut, *tmp;
126 uint8_t packet_type = UDP_DATA_PACKET;
129 struct timeval *chunk_tv;
130 uint8_t stream_type = header_len? UDP_HEADER_STREAM : UDP_PLAIN_STREAM;
132 // PARA_NOTICE_LOG("header_len: %zd, header_buf: %p\n", header_len,
134 if (sender_status != SENDER_ON)
137 /* we might not yet know the chunk time */
138 chunk_tv = vss_chunk_time();
141 if (list_empty(&targets))
143 list_for_each_entry_safe(ut, tmp, &targets, node) {
144 ret = udp_init_session(ut);
146 udp_delete_target(ut, para_strerror(-ret));
148 if (!need_extra_header(current_chunk))
151 packet_type = UDP_BOF_PACKET;
153 packet_type = UDP_HEADER_PACKET;
154 sendbuf_len = UDP_AUDIO_HEADER_LEN + header_len + len;
155 sendbuf = para_malloc(sendbuf_len);
156 udp_write_magic(sendbuf);
157 udp_write_stream_type(sendbuf, stream_type);
158 udp_write_packet_type(sendbuf, packet_type);
159 udp_write_header_len(sendbuf, header_len);
161 memcpy(sendbuf + UDP_AUDIO_HEADER_LEN, header_buf,
163 memcpy(sendbuf + UDP_AUDIO_HEADER_LEN + header_len, buf, len);
164 udp_send_buf(sendbuf, sendbuf_len);
168 static int udp_com_on(__a_unused struct sender_command_data *scd)
170 sender_status = SENDER_ON;
174 static int udp_com_off(__a_unused struct sender_command_data *scd)
176 udp_shutdown_targets();
177 sender_status = SENDER_OFF;
181 static int udp_com_delete(struct sender_command_data *scd)
183 char *a = para_strdup(inet_ntoa(scd->addr));
184 struct udp_target *ut, *tmp;
185 list_for_each_entry_safe(ut, tmp, &targets, node) {
186 if (scd->port != ut->port)
188 if (strcmp(TARGET_ADDR(ut), a))
190 udp_delete_target(ut, "com_delete");
195 static void udp_add_target(int port, struct in_addr *addr)
197 struct udp_target *ut = para_calloc(sizeof(struct udp_target));
200 ut->fd = -1; /* not yet connected */
201 PARA_INFO_LOG("adding to target list (%s:%d)\n",
202 TARGET_ADDR(ut), ut->port);
203 para_list_add(&ut->node, &targets);
206 static int udp_com_add(struct sender_command_data *scd)
208 int port = (scd->port > 0)? scd->port : conf.udp_default_port_arg;
209 udp_add_target(port, &scd->addr);
213 static char *udp_info(void)
215 struct udp_target *ut;
216 char *ret, *tgts = NULL;
218 list_for_each_entry(ut, &targets, node) {
219 char *tmp = make_message("%s%s:%d ", tgts? tgts : "",
220 TARGET_ADDR(ut), ut->port);
229 (sender_status == SENDER_ON)? "on" : "off",
230 conf.udp_default_port_arg,
231 tgts? tgts : "(none)"
237 static void udp_init_target_list(void)
241 INIT_LIST_HEAD(&targets);
242 for (i = 0; i < conf.udp_target_given; i++) {
243 char *arg = para_strdup(conf.udp_target_arg[i]);
244 char *p = strchr(arg, ':');
251 if (!inet_pton(AF_INET, arg, &addr))
254 if (port < 0 || port > 65535)
255 port = conf.udp_default_port_arg;
256 udp_add_target(port, &addr);
259 PARA_CRIT_LOG("syntax error for udp target option "
260 "#%d, ignoring\n", i);
267 static char *udp_help(void)
271 "usage: {add|delete} IP port\n"
272 "example: add 224.0.1.38 8000 (multicast streaming)\n"
277 * The init function of para_server's udp sender.
279 * \param s Pointer to the http sender struct.
281 * It initializes all function pointers of \a s and the list of udp targets.
283 void udp_send_init(struct sender *s)
285 INIT_LIST_HEAD(&targets);
289 s->pre_select = NULL;
290 s->post_select = NULL;
291 s->shutdown_clients = udp_shutdown_targets;
292 s->client_cmds[SENDER_ON] = udp_com_on;
293 s->client_cmds[SENDER_OFF] = udp_com_off;
294 s->client_cmds[SENDER_DENY] = NULL;
295 s->client_cmds[SENDER_ALLOW] = NULL;
296 s->client_cmds[SENDER_ADD] = udp_com_add;
297 s->client_cmds[SENDER_DELETE] = udp_com_delete;
298 sender_status = SENDER_OFF;
299 udp_init_target_list();
300 if (!conf.udp_no_autostart_given)
301 sender_status = SENDER_ON;
302 PARA_DEBUG_LOG("udp sender init complete\n");