rtmp server

1 files changed, 820 insertions, 0 deletions

diff --git a/rtmpserver.cpp b/rtmpserver.cpp
new file mode 100644
index 0000000..3d0d4f0
--- /dev/null
+++ b/rtmpserver.cpp
@@ -0,0 +1,820 @@
+#include "amf.h"
+#include "rtmputils.h"
+#include "rtmp.h"
+#include <vector>
+#include <stdexcept>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <assert.h>
+#include <stdarg.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <sys/poll.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "rtmpserver.h"
+
+#define APP_NAME	"live"
+
+RtmpCallbacks g_rtmp_server_cbs;
+void *g_rtmp_server_ctx;
+
+struct RTMP_Message {
+	uint8_t type;
+	size_t len;
+	unsigned long timestamp;
+	uint32_t endpoint;
+	std::string buf;
+};
+
+struct Client {
+	int fd;
+    bool publisher;
+	bool playing; /* Wants to receive the stream? */
+	bool ready; /* Wants to receive and seen a keyframe */
+	RTMP_Message messages[64];
+	std::string buf;
+	std::string send_queue;
+    std::string path;
+	size_t chunk_len;
+	uint32_t written_seq;
+	uint32_t read_seq;
+};
+
+namespace {
+
+amf_object_t metadata;
+int listen_fd;
+std::vector<pollfd> poll_table;
+std::vector<Client *> clients;
+
+int set_nonblock(int fd, bool enabled)
+{
+	int flags = fcntl(fd, F_GETFL) & ~O_NONBLOCK;
+	if (enabled) {
+		flags |= O_NONBLOCK;
+	}
+	return fcntl(fd, F_SETFL, flags);
+}
+
+size_t recv_all(int fd, void *buf, size_t len)
+{
+	size_t pos = 0;
+	while (pos < len) {
+		ssize_t bytes = recv(fd, (char *) buf + pos, len - pos, 0);
+		if (bytes < 0) {
+			if (errno == EAGAIN || errno == EINTR)
+				continue;
+            throw std::runtime_error(strf("unable to recv: %s", strerror(errno)));
+		}
+		if (bytes == 0)
+			break;
+		pos += bytes;
+	}
+	return pos;
+}
+
+size_t send_all(int fd, const void *buf, size_t len)
+{
+	size_t pos = 0;
+	while (pos < len) {
+		ssize_t written = send(fd, (const char *) buf + pos, len - pos, 0);
+		if (written < 0) {
+			if (errno == EAGAIN || errno == EINTR)
+				continue;
+            throw std::runtime_error(strf("unable to send: %s", strerror(errno)));
+		}
+		if (written == 0)
+			break;
+		pos += written;
+	}
+	return pos;
+}
+
+bool is_safe(uint8_t b)
+{
+	return b >= ' ' && b < 128;
+}
+
+void hexdump(const void *buf, size_t len)
+{
+	const uint8_t *data = (const uint8_t *) buf;
+	for (size_t i = 0; i < len; i += 16) {
+		for (int j = 0; j < 16; ++j) {
+			if (i + j < len)
+				debug("%.2x ", data[i + j]);
+			else
+				debug("   ");
+		}
+		for (int j = 0; j < 16; ++j) {
+			if (i + j < len) {
+				putc(is_safe(data[i + j]) ? data[i + j] : '.',
+				     stdout);
+			} else {
+				putc(' ', stdout);
+			}
+		}
+		putc('\n', stdout);
+	}
+}
+
+void try_to_send(void *data)
+{
+    Client *client = (Client *)data;
+	size_t len = client->send_queue.size();
+	if (len > 4096)
+		len = 4096;
+
+	ssize_t written = send(client->fd, client->send_queue.data(), len, 0);
+	if (written < 0) {
+		if (errno == EAGAIN || errno == EINTR)
+			return;
+		throw std::runtime_error(strf("unable to write to a client: %s",
+						strerror(errno)));
+	}
+
+	client->send_queue.erase(0, written);
+}
+
+void rtmp_send(Client *client, uint8_t type, uint32_t endpoint,
+		const std::string &buf, unsigned long timestamp = 0,
+		int channel_num = CHAN_CONTROL)
+{
+	if (endpoint == STREAM_ID) {
+		/*
+		 * For some unknown reason, stream-related msgs must be sent
+		 * on a specific channel.
+		 */
+		channel_num = CHAN_STREAM;
+	}
+
+	RTMP_Header header;
+	header.flags = (channel_num & 0x3f) | (0 << 6);
+	header.msg_type = type;
+	set_be24(header.timestamp, timestamp);
+	set_be24(header.msg_len, buf.size());
+	set_le32(header.endpoint, endpoint);
+
+	client->send_queue.append((char *) &header, sizeof header);
+	client->written_seq += sizeof header;
+
+	size_t pos = 0;
+	while (pos < buf.size()) {
+		if (pos) {
+			uint8_t flags = (channel_num & 0x3f) | (3 << 6);
+			client->send_queue += char(flags);
+
+			client->written_seq += 1;
+		}
+
+		size_t chunk = buf.size() - pos;
+		if (chunk > client->chunk_len)
+			chunk = client->chunk_len;
+		client->send_queue.append(buf, pos, chunk);
+
+		client->written_seq += chunk;
+		pos += chunk;
+	}
+
+	try_to_send(client);
+}
+
+void send_reply(Client *client, double txid, const AMFValue &reply = AMFValue(),
+		const AMFValue &status = AMFValue())
+{
+	if (txid <= 0.0)
+		return;
+	Encoder invoke;
+    amf_write(&invoke, std::string("_result"));
+	amf_write(&invoke, txid);
+	amf_write(&invoke, reply);
+	amf_write(&invoke, status);
+	rtmp_send(client, MSG_INVOKE, CONTROL_ID, invoke.buf, 0, CHAN_RESULT);
+}
+
+void handle_connect(Client *client, double txid, Decoder *dec)
+{
+	amf_object_t params = amf_load_object(dec);
+	std::string app = get(params, std::string("app")).as_string();
+	std::string ver = "(unknown)";
+	
+	AMFValue flashver = get(params, std::string("flashVer"));
+	if (flashver.type() == AMF_STRING) {
+		ver = flashver.as_string();
+	}
+
+    /*
+	if (app != APP_NAME) {
+		throw std::runtime_error("Unsupported application: " + app);
+	}
+    */
+
+	printf("connect: %s (version %s)\n", app.c_str(), ver.c_str());
+
+	amf_object_t version;
+	version.insert(std::make_pair("fmsVer", std::string("FMS/4,5,1,484")));
+	version.insert(std::make_pair("capabilities", 255.0));
+	version.insert(std::make_pair("mode", 1.0));
+
+	amf_object_t status;
+	status.insert(std::make_pair("code", std::string("NetConnection.Connect.Success")));
+	/* report support for AMF3 */
+	// status.insert(std::make_pair("objectEncoding", 3.0));
+
+	send_reply(client, txid, version, status);
+
+/*
+	uint32_t chunk_len = htonl(1024);
+	std::string set_chunk((char *) &chunk_len, 4);
+	rtmp_send(client, MSG_SET_CHUNK, CONTROL_ID, set_chunk, 0,
+		  MEDIA_CHANNEL);
+
+	client->chunk_len = 1024;
+*/
+}
+
+int publishernum = 0;
+
+void handle_fcpublish(Client *client, double txid, Decoder *dec)
+{
+	if (publishernum > 0) {
+		throw std::runtime_error{"only one publisher."};
+	}
+	publishernum = 1;
+    g_rtmp_server_cbs.on_start(g_rtmp_server_ctx);
+    client->publisher = true;
+    printf( "publisher connected.");
+
+	amf_load(dec); /* NULL */
+
+	std::string path = amf_load_string(dec);
+	debug("fcpublish %s\n", path.c_str());
+
+    client->path = path;
+
+	amf_object_t status;
+	status.insert(std::make_pair("code", std::string("NetStream.Publish.Start")));
+	status.insert(std::make_pair("description", path));
+
+	Encoder invoke;
+	amf_write(&invoke, std::string("onFCPublish"));
+	amf_write(&invoke, 0.0);
+	amf_write_null(&invoke);
+	amf_write(&invoke, status);
+	rtmp_send(client, MSG_INVOKE, CONTROL_ID, invoke.buf);
+
+	send_reply(client, txid);
+}
+
+void handle_createstream(Client *client, double txid, Decoder *dec)
+{
+	send_reply(client, txid, AMFValue(), double(STREAM_ID));
+}
+
+void handle_publish(Client *client, double txid, Decoder *dec)
+{
+	amf_load(dec); /* NULL */
+
+	std::string path = amf_load_string(dec);
+	debug("publish %s\n", path.c_str());
+
+    client->path = path;
+
+	amf_object_t status;
+	status.insert(std::make_pair("level", std::string("status")));
+	status.insert(std::make_pair("code", std::string("NetStream.Publish.Start")));
+	status.insert(std::make_pair("description", std::string("Stream is now published.")));
+	status.insert(std::make_pair("details", path));
+
+	Encoder invoke;
+	amf_write(&invoke, std::string("onStatus"));
+	amf_write(&invoke, 0.0);
+	amf_write_null(&invoke);
+	amf_write(&invoke, status);
+	rtmp_send(client, MSG_INVOKE, STREAM_ID, invoke.buf);
+
+	send_reply(client, txid);
+}
+
+void start_playback(Client *client)
+{
+	throw std::runtime_error{"playback not supported."};
+}
+
+void handle_play(Client *client, double txid, Decoder *dec)
+{
+	amf_load(dec); /* NULL */
+
+	std::string path = amf_load_string(dec);
+
+	debug("play %s\n", path.c_str());
+    client->path = path;
+
+	start_playback(client);
+
+	send_reply(client, txid);
+}
+
+void handle_play2(Client *client, double txid, Decoder *dec)
+{
+	amf_load(dec); /* NULL */
+
+	amf_object_t params = amf_load_object(dec);
+	std::string path = get(params, std::string("streamName")).as_string();
+
+	debug("play %s\n", path.c_str());
+    client->path = path;
+	start_playback(client);
+
+	send_reply(client, txid);
+}
+
+void handle_pause(Client *client, double txid, Decoder *dec)
+{
+	amf_load(dec); /* NULL */
+
+	bool paused = amf_load_boolean(dec);
+
+	if (paused) {
+		debug("pausing\n");
+
+		amf_object_t status;
+		status.insert(std::make_pair("level", std::string("status")));
+		status.insert(std::make_pair("code", std::string("NetStream.Pause.Notify")));
+		status.insert(std::make_pair("description", std::string("Pausing.")));
+
+		Encoder invoke;
+		amf_write(&invoke, std::string("onStatus"));
+		amf_write(&invoke, 0.0);
+		amf_write_null(&invoke);
+		amf_write(&invoke, status);
+		rtmp_send(client, MSG_INVOKE, STREAM_ID, invoke.buf);
+		client->playing = false;
+	} else {
+		start_playback(client);
+	}
+
+	send_reply(client, txid);
+}
+
+void handle_setdataframe(Client *client, Decoder *dec)
+{
+    if(client->publisher == false) {
+           printf("not a publisher");
+           throw std::runtime_error("not a publisher");
+    }
+
+    printf( "client paht is %s",client->path.c_str());
+
+	std::string type = amf_load_string(dec);
+	if (type != "onMetaData") {
+		throw std::runtime_error("can only set metadata");
+	}
+
+	metadata = amf_load_ecma(dec);
+
+	Encoder notify;
+	amf_write(&notify, std::string("onMetaData"));
+	amf_write_ecma(&notify, metadata);
+
+	FOR_EACH(std::vector<Client *>, i, clients) {
+        Client *receiver = *i;
+        if (receiver != NULL && receiver->playing && receiver->path == client->path) {
+			rtmp_send(client, MSG_NOTIFY, STREAM_ID, notify.buf);
+		}
+	}
+}
+
+void handle_invoke(Client *client, const RTMP_Message *msg, Decoder *dec)
+{
+	std::string method = amf_load_string(dec);
+	double txid = amf_load_number(dec);
+
+    debug( "invoked %s txid %f\n", method.c_str(), txid);
+
+	if (msg->endpoint == CONTROL_ID) {
+		if (method == "connect") {
+			handle_connect(client, txid, dec);
+		} else if (method == "FCPublish") {
+			handle_fcpublish(client, txid, dec);
+		} else if (method == "createStream") {
+			handle_createstream(client, txid, dec);
+		}
+
+	} else if (msg->endpoint == STREAM_ID) {
+		if (method == "publish") {
+			handle_publish(client, txid, dec);
+		} else if (method == "play") {
+			handle_play(client, txid, dec);
+		} else if (method == "play2") {
+			handle_play2(client, txid, dec);
+		} else if (method == "pause") {
+			handle_pause(client, txid, dec);
+		}
+	}
+}
+
+void handle_message(Client *client, RTMP_Message *msg)
+{
+	
+	debug("RTMP message %02x, len %zu, timestamp %ld\n", msg->type, msg->len,
+		msg->timestamp);
+	
+	size_t pos = 0;
+
+	switch (msg->type) {
+	case MSG_BYTES_READ:
+		if (pos + 4 > msg->buf.size()) {
+            throw std::runtime_error("Not enough data");
+		}
+		client->read_seq = load_be32(&msg->buf[pos]);
+		debug("%d in queue\n",
+			int(client->written_seq - client->read_seq));
+		break;
+
+	case MSG_SET_CHUNK:
+		if (pos + 4 > msg->buf.size()) {
+            throw std::runtime_error("Not enough data");
+		}
+		client->chunk_len = load_be32(&msg->buf[pos]);
+		debug("chunk size set to %zu\n", client->chunk_len);
+		break;
+
+	case MSG_INVOKE: {
+            debug("handling message invoke 0 \n");
+			Decoder dec;
+			dec.version = 0;
+			dec.buf = msg->buf;
+			dec.pos = 0;
+			handle_invoke(client, msg, &dec);
+		}
+		break;
+
+	case MSG_INVOKE3: {
+            debug("handling message invoke 3 \n");
+			Decoder dec;
+            dec.version = 0;
+			dec.buf = msg->buf;
+			dec.pos = 1;
+			handle_invoke(client, msg, &dec);
+		}
+		break;
+
+	case MSG_NOTIFY: {
+			Decoder dec;
+			dec.version = 0;
+			dec.buf = msg->buf;
+			dec.pos = 0;
+			std::string type = amf_load_string(&dec);
+			debug("notify %s\n", type.c_str());
+			if (msg->endpoint == STREAM_ID) {
+				if (type == "@setDataFrame") {
+					handle_setdataframe(client, &dec);
+				}
+			}
+		}
+		break;
+
+	case MSG_AUDIO:
+        if(client->publisher == false) {
+            throw std::runtime_error("not a publisher");
+        }
+        g_rtmp_server_cbs.on_audio(g_rtmp_server_ctx, msg->timestamp, (char*)msg->buf.c_str(), msg->buf.size());
+		// FOR_EACH(std::vector<Client *>, i, clients) {
+		// 	Client *receiver = *i;
+		// 	if (receiver != NULL && receiver->ready) {
+		// 		rtmp_send(receiver, MSG_AUDIO, STREAM_ID,
+		// 			  msg->buf, msg->timestamp);
+		// 	}
+		// }
+		break;
+	case MSG_VIDEO: {
+        if(client->publisher == false){
+            throw std::runtime_error("not a publisher");
+        }
+		// uint8_t flags = msg->buf[0];
+        g_rtmp_server_cbs.on_video(g_rtmp_server_ctx, msg->timestamp, (char*)msg->buf.c_str(), msg->buf.size());
+		// FOR_EACH(std::vector<Client *>, i, clients) {
+		// 	Client *receiver = *i;
+        //     if (receiver != NULL && receiver->playing &&
+        //             client->path == receiver->path) {
+		// 		if (flags >> 4 == FLV_KEY_FRAME &&
+		// 		    !receiver->ready) {
+		// 			std::string control;
+		// 			uint16_t type = htons(CONTROL_CLEAR_STREAM);
+		// 			control.append((char *) &type, 2);
+		// 			uint32_t stream = htonl(STREAM_ID);
+		// 			control.append((char *) &stream, 4);
+		// 			rtmp_send(receiver, MSG_USER_CONTROL, CONTROL_ID, control);
+		// 			receiver->ready = true;
+		// 		}
+		// 		if (receiver->ready) {
+        //             static int flag = 0;
+        //             if(flag < 10) {
+        //                 flag ++;
+        //             }
+        //             rtmp_send(receiver, MSG_VIDEO,
+		// 				  STREAM_ID, msg->buf,
+		// 				  msg->timestamp);
+		// 		}
+		// 	}
+		// }
+		}
+		break;
+
+	case MSG_FLASH_VIDEO:
+        //printf( "streaming FLV not supported");
+        throw std::runtime_error("streaming FLV not supported");
+		break;
+
+	default:
+		debug("unhandled message: %02x\n", msg->type);
+		hexdump(msg->buf.data(), msg->buf.size());
+		break;
+	}
+}
+
+/* TODO: Make this asynchronous */
+void do_handshake(Client *client)
+{
+	Handshake serversig;
+	Handshake clientsig;
+
+	uint8_t c;
+	if (recv_all(client->fd, &c, 1) < 1)
+		return;
+	if (c != HANDSHAKE_PLAINTEXT) {
+        //printf( "only plaintext handshake supported");
+        throw std::runtime_error("only plaintext handshake supported");
+	}
+
+	if (send_all(client->fd, &c, 1) < 1)
+		return;
+
+	memset(&serversig, 0, sizeof serversig);
+	serversig.flags[0] = 0x03;
+	for (int i = 0; i < RANDOM_LEN; ++i) {
+		serversig.random[i] = rand();
+	}
+
+	if (send_all(client->fd, &serversig, sizeof serversig) < sizeof serversig)
+		return;
+
+	/* Echo client's signature back */
+	if (recv_all(client->fd, &clientsig, sizeof serversig) < sizeof serversig)
+		return;
+	if (send_all(client->fd, &clientsig, sizeof serversig) < sizeof serversig)
+		return;
+
+	if (recv_all(client->fd, &clientsig, sizeof serversig) < sizeof serversig)
+		return;
+	if (memcmp(serversig.random, clientsig.random, RANDOM_LEN) != 0) {
+        //printf( "invalid handshake");
+        throw std::runtime_error("invalid handshake");
+	}
+
+	client->read_seq = 1 + sizeof serversig * 2;
+	client->written_seq = 1 + sizeof serversig * 2;
+}
+
+void recv_from_client(void *data)
+{
+    Client *client = (Client *)data;
+
+	std::string chunk(4096, 0);
+	ssize_t got = recv(client->fd, &chunk[0], chunk.size(), 0);
+	if (got == 0) {
+        //printf( "end of life from a client");
+		throw std::runtime_error("EOF from a client");
+	} else if (got < 0) {
+		if (errno == EAGAIN || errno == EINTR)
+			return;
+        //printf( "unable to read from a client: %s",strerror(errno));
+        throw std::runtime_error(strf("unable to read from a client: %s",strerror(errno)));
+	}
+	client->buf.append(chunk, 0, got);
+
+    //printf( "got data and length is %d",client->buf.size());
+
+	while (!client->buf.empty()) {
+		uint8_t flags = client->buf[0];
+
+		static const size_t HEADER_LENGTH[] = {12, 8, 4, 1};
+		size_t header_len = HEADER_LENGTH[flags >> 6];
+
+		if (client->buf.size() < header_len) {
+			/* need more data */
+			break;
+		}
+
+		RTMP_Header header;
+		memcpy(&header, client->buf.data(), header_len);
+
+		RTMP_Message *msg = &client->messages[flags & 0x3f];
+
+		if (header_len >= 8) {
+			msg->len = load_be24(header.msg_len);
+			if (msg->len < msg->buf.size()) {
+				throw std::runtime_error("invalid msg length");
+			}
+			msg->type = header.msg_type;
+		}
+		if (header_len >= 12) {
+			msg->endpoint = load_le32(header.endpoint);
+		}
+
+		if (msg->len == 0) {
+			throw std::runtime_error("message without a header");
+		}
+		size_t chunk = msg->len - msg->buf.size();
+		if (chunk > client->chunk_len)
+			chunk = client->chunk_len;
+
+		if (client->buf.size() < header_len + chunk) {
+			/* need more data */
+			break;
+		}
+
+		if (header_len >= 4) {
+			unsigned long ts = load_be24(header.timestamp);
+			if (ts == 0xffffff) {
+				throw std::runtime_error("ext timestamp not supported");
+			}
+			if (header_len < 12) {
+				ts += msg->timestamp;
+			}
+			msg->timestamp = ts;
+		}
+
+		msg->buf.append(client->buf, header_len, chunk);
+		client->buf.erase(0, header_len + chunk);
+
+		if (msg->buf.size() == msg->len) {
+			handle_message(client, msg);
+			msg->buf.clear();
+		}
+	}
+}
+
+Client *new_client()
+{
+	sockaddr_in sin;
+	socklen_t addrlen = sizeof sin;
+	int fd = accept(listen_fd, (sockaddr *) &sin, &addrlen);
+	if (fd < 0) {
+		printf("Unable to accept a client: %s\n", strerror(errno));
+		return NULL;
+	}
+
+	Client *client = new Client;
+    client->publisher = false;
+	client->playing = false;
+	client->ready = false;
+	client->fd = fd;
+	client->written_seq = 0;
+	client->read_seq = 0;
+	client->chunk_len = DEFAULT_CHUNK_LEN;
+	for (int i = 0; i < 64; ++i) {
+		client->messages[i].timestamp = 0;
+		client->messages[i].len = 0;
+	}
+
+	try {
+		do_handshake(client);
+	} catch (const std::runtime_error &e) {
+		printf("handshake failed: %s\n", e.what());
+		close(fd);
+		delete client;
+		return NULL;
+	}
+
+    set_nonblock(fd, true);
+
+	pollfd entry;
+	entry.events = POLLIN;
+	entry.revents = 0;
+	entry.fd = fd;
+	poll_table.push_back(entry);
+	clients.push_back(client);
+
+	return client;
+}
+
+void close_client(Client *client, size_t i)
+{
+	clients.erase(clients.begin() + i);
+	poll_table.erase(poll_table.begin() + i);
+	close(client->fd);
+
+    if (client->publisher == true) {
+		printf("publisher disconnected.\n");
+        client->publisher = false;
+		publishernum = 0;
+        g_rtmp_server_cbs.on_stop(g_rtmp_server_ctx);
+        FOR_EACH(std::vector<Client *>, i, clients) {
+            Client *client = *i;
+            if (client != NULL) {
+                client->ready = false;
+            }
+        }
+    }
+	delete client;
+}
+
+void do_poll(void)
+{
+	for (size_t i = 0; i < poll_table.size(); ++i) {
+		Client *client = clients[i];
+		if (client != NULL) {
+			if (!client->send_queue.empty()) {
+                //debug("waiting for pollout\n");
+				poll_table[i].events = POLLIN | POLLOUT;
+			} else {
+				poll_table[i].events = POLLIN;
+			}
+		}
+	}
+
+	if (poll(&poll_table[0], poll_table.size(), -1) < 0) {
+		if (errno == EAGAIN || errno == EINTR)
+			return;
+		throw std::runtime_error(strf("poll() failed: %s",
+						strerror(errno)));
+	}
+
+	for (size_t i = 0; i < poll_table.size(); ++i) {
+		Client *client = clients[i];
+		if (poll_table[i].revents & POLLOUT) {
+			try {
+                try_to_send(client);
+			} catch (const std::runtime_error &e) {
+				printf("client error: %s\n", e.what());
+				close_client(client, i);
+				--i;
+				continue;
+			}
+		}
+		if (poll_table[i].revents & POLLIN) {
+			if (client == NULL) {
+				new_client();
+			} else try {
+				recv_from_client(client);
+			} catch (const std::runtime_error &e) {
+				printf("client error: %s\n", e.what());
+				close_client(client, i);
+				--i;
+			}
+		}
+	}
+}
+
+}
+
+int g_rtmp_server_quit = 0;
+
+void start_rtmpserver(RtmpCallbacks cbs, void *ctx) {
+    g_rtmp_server_cbs = cbs;
+    g_rtmp_server_ctx = ctx;
+    try {
+        listen_fd = socket(AF_INET, SOCK_STREAM, 0);
+        if (listen_fd < 0)
+            return;
+		int opt = 1;
+		if (setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
+        	perror("setsockopt SO_REUSEADDR");
+        	exit(EXIT_FAILURE);
+    	}
+        sockaddr_in sin;
+        sin.sin_family = AF_INET;
+        sin.sin_port = htons(PORT);
+        sin.sin_addr.s_addr = INADDR_ANY;
+        if (bind(listen_fd, (sockaddr *) &sin, sizeof sin) < 0) {
+            throw std::runtime_error(strf("Unable to listen: %s",strerror(errno)));
+            return;
+        }
+
+        listen(listen_fd, 10);
+
+        pollfd entry;
+        entry.events = POLLIN;
+        entry.revents = 0;
+        entry.fd = listen_fd;
+        poll_table.push_back(entry);
+        clients.push_back(NULL);
+
+        for (;;) {
+            if (g_rtmp_server_quit) {
+                return;
+            }
+            do_poll();
+        }
+        return;
+    } catch (const std::runtime_error &e) {
+	    fprintf(stderr, "ERROR: %s\n", e.what());
+        return;
+    }
+}