2 * Copyright (C) 2005-2008 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);
69 return udp_delete_target(ut, "send error");
71 PARA_WARNING_LOG("short write %zu/%zu\n", written, len);
75 static void udp_init_session(struct udp_target *ut)
77 PARA_NOTICE_LOG("sending to udp %s:%d\n", TARGET_ADDR(ut), ut->port);
78 ut->fd = create_udp_send_socket(TARGET_ADDR(ut), ut->port, 10);
81 static void udp_shutdown_targets(void)
83 char buf[UDP_AUDIO_HEADER_LEN];
84 struct udp_target *ut, *tmp;
86 udp_write_packet_type(buf, UDP_EOF_PACKET);
87 list_for_each_entry_safe(ut, tmp, &targets, node) {
90 PARA_INFO_LOG("sending eof to udp target %s:%d\n",
91 TARGET_ADDR(ut), ut->port);
92 write(ut->fd, buf, UDP_AUDIO_HEADER_LEN);
96 static int need_extra_header(long unsigned current_chunk)
98 static struct timeval last_header;
103 tv_diff(now, &last_header, &diff);
104 if (tv2ms(&diff) < conf.udp_header_interval_arg)
110 static void udp_send(long unsigned current_chunk, __a_unused long unsigned chunks_sent,
111 const char *buf, size_t len, const char *header_buf,
114 struct udp_target *ut, *tmp;
116 int packet_type = UDP_DATA_PACKET;
118 struct timeval *chunk_tv;
119 uint8_t stream_type = header_len? UDP_HEADER_STREAM : UDP_PLAIN_STREAM;
121 // PARA_NOTICE_LOG("header_len: %zd, header_buf: %p\n", header_len,
123 if (sender_status != SENDER_ON)
126 /* we might not yet know the chunk time */
127 chunk_tv = vss_chunk_time();
130 if (list_empty(&targets))
132 list_for_each_entry_safe(ut, tmp, &targets, node) {
134 udp_init_session(ut);
136 if (!need_extra_header(current_chunk))
139 packet_type = UDP_BOF_PACKET;
141 packet_type = UDP_HEADER_PACKET;
142 sendbuf_len = UDP_AUDIO_HEADER_LEN + header_len + len;
143 sendbuf = para_malloc(sendbuf_len);
144 udp_write_magic(sendbuf);
145 udp_write_stream_type(sendbuf, stream_type);
146 udp_write_packet_type(sendbuf, packet_type);
147 udp_write_header_len(sendbuf, header_len);
149 memcpy(sendbuf + UDP_AUDIO_HEADER_LEN, header_buf,
151 memcpy(sendbuf + UDP_AUDIO_HEADER_LEN + header_len, buf, len);
152 udp_send_buf(sendbuf, sendbuf_len);
156 static int udp_com_on(__a_unused struct sender_command_data *scd)
158 sender_status = SENDER_ON;
162 static int udp_com_off(__a_unused struct sender_command_data *scd)
164 udp_shutdown_targets();
165 sender_status = SENDER_OFF;
169 static int udp_com_delete(struct sender_command_data *scd)
171 char *a = para_strdup(inet_ntoa(scd->addr));
172 struct udp_target *ut, *tmp;
173 list_for_each_entry_safe(ut, tmp, &targets, node) {
174 if (scd->port != ut->port)
176 if (strcmp(TARGET_ADDR(ut), a))
178 udp_delete_target(ut, "com_delete");
183 static void udp_add_target(int port, struct in_addr *addr)
185 struct udp_target *ut = para_calloc(sizeof(struct udp_target));
188 ut->fd = -1; /* not yet connected */
189 PARA_INFO_LOG("adding to target list (%s:%d)\n",
190 TARGET_ADDR(ut), ut->port);
191 para_list_add(&ut->node, &targets);
194 static int udp_com_add(struct sender_command_data *scd)
196 int port = (scd->port > 0)? scd->port : conf.udp_default_port_arg;
197 udp_add_target(port, &scd->addr);
201 static char *udp_info(void)
203 struct udp_target *ut;
204 char *ret, *tgts = NULL;
206 list_for_each_entry(ut, &targets, node) {
207 char *tmp = make_message("%s%s:%d ", tgts? tgts : "",
208 TARGET_ADDR(ut), ut->port);
217 (sender_status == SENDER_ON)? "on" : "off",
218 conf.udp_default_port_arg,
219 tgts? tgts : "(none)"
225 static void udp_init_target_list(void)
229 INIT_LIST_HEAD(&targets);
230 for (i = 0; i < conf.udp_target_given; i++) {
231 char *arg = para_strdup(conf.udp_target_arg[i]);
232 char *p = strchr(arg, ':');
239 if (!inet_pton(AF_INET, arg, &addr))
242 if (port < 0 || port > 65535)
243 port = conf.udp_default_port_arg;
244 udp_add_target(port, &addr);
247 PARA_CRIT_LOG("syntax error for udp target option "
248 "#%d, ignoring\n", i);
255 static char *udp_help(void)
259 "usage: {add|delete} IP port\n"
260 "example: add 224.0.1.38 8000 (multicast streaming)\n"
265 * The init function of para_server's udp sender.
267 * \param s Pointer to the http sender struct.
269 * It initializes all function pointers of \a s and the list of udp targets.
271 void udp_send_init(struct sender *s)
273 INIT_LIST_HEAD(&targets);
277 s->pre_select = NULL;
278 s->post_select = NULL;
279 s->shutdown_clients = udp_shutdown_targets;
280 s->client_cmds[SENDER_ON] = udp_com_on;
281 s->client_cmds[SENDER_OFF] = udp_com_off;
282 s->client_cmds[SENDER_DENY] = NULL;
283 s->client_cmds[SENDER_ALLOW] = NULL;
284 s->client_cmds[SENDER_ADD] = udp_com_add;
285 s->client_cmds[SENDER_DELETE] = udp_com_delete;
286 sender_status = SENDER_OFF;
287 udp_init_target_list();
288 if (!conf.udp_no_autostart_given)
289 sender_status = SENDER_ON;
290 PARA_DEBUG_LOG("udp sender init complete\n");