X-Git-Url: https://git.sesse.net/?p=cubemap;a=blobdiff_plain;f=server.cpp;h=a11b55f72e6f62d7e1401925e4c113a58df9ceec;hp=c9b942f2c686e19a5d06682eb79075f7e59defad;hb=ca5f208423d42bc6d9a8601d5f9a6ffae0119f40;hpb=c5cdeee3a4c99abbf7303b47634b0a748e50bcb4

diff --git a/server.cpp b/server.cpp
index c9b942f..a11b55f 100644
--- a/server.cpp
+++ b/server.cpp
@@ -1,175 +1,28 @@
-#include <stdio.h>
-#include <string.h>
-#include <stdint.h>
-#include <unistd.h>
 #include <assert.h>
-#include <arpa/inet.h>
-#include <sys/socket.h>
+#include <errno.h>
 #include <pthread.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include <sys/epoll.h>
 #include <sys/sendfile.h>
-#include <time.h>
-#include <signal.h>
-#include <errno.h>
-#include <vector>
-#include <string>
-#include <map>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
 #include <algorithm>
+#include <map>
+#include <string>
+#include <utility>
+#include <vector>
 
 #include "markpool.h"
-#include "metacube.h"
-#include "server.h"
 #include "mutexlock.h"
 #include "parse.h"
-#include "util.h"
+#include "server.h"
 #include "state.pb.h"
+#include "stream.h"
 
 using namespace std;
 
-Client::Client(int sock)
-	: sock(sock),
-	  fwmark(0),
-	  connect_time(time(NULL)),
-	  state(Client::READING_REQUEST),
-	  stream(NULL),
-	  header_or_error_bytes_sent(0),
-	  bytes_sent(0)
-{
-	request.reserve(1024);
-
-	// Find the remote address, and convert it to ASCII.
-	sockaddr_in6 addr;
-	socklen_t addr_len = sizeof(addr);
-
-	if (getpeername(sock, reinterpret_cast<sockaddr *>(&addr), &addr_len) == -1) {
-		perror("getpeername");
-		remote_addr = "";
-	} else {
-		char buf[INET6_ADDRSTRLEN];
-		if (inet_ntop(addr.sin6_family, &addr.sin6_addr, buf, sizeof(buf)) == NULL) {
-			perror("inet_ntop");
-			remote_addr = "";
-		} else {
-			remote_addr = buf;
-		}
-	}
-}
-	
-Client::Client(const ClientProto &serialized, Stream *stream)
-	: sock(serialized.sock()),
-	  remote_addr(serialized.remote_addr()),
-	  connect_time(serialized.connect_time()),
-	  state(State(serialized.state())),
-	  request(serialized.request()),
-	  stream_id(serialized.stream_id()),
-	  stream(stream),
-	  header_or_error(serialized.header_or_error()),
-	  header_or_error_bytes_sent(serialized.header_or_error_bytes_sent()),
-	  bytes_sent(serialized.bytes_sent())
-{
-	if (stream->mark_pool != NULL) {
-		fwmark = stream->mark_pool->get_mark();
-	} else {
-		fwmark = 0;  // No mark.
-	}
-	if (setsockopt(sock, SOL_SOCKET, SO_MARK, &fwmark, sizeof(fwmark)) == -1) {
-		if (fwmark != 0) {
-			perror("setsockopt(SO_MARK)");
-		}
-	}
-}
-
-ClientProto Client::serialize() const
-{
-	ClientProto serialized;
-	serialized.set_sock(sock);
-	serialized.set_remote_addr(remote_addr);
-	serialized.set_connect_time(connect_time);
-	serialized.set_state(state);
-	serialized.set_request(request);
-	serialized.set_stream_id(stream_id);
-	serialized.set_header_or_error(header_or_error);
-	serialized.set_header_or_error_bytes_sent(serialized.header_or_error_bytes_sent());
-	serialized.set_bytes_sent(bytes_sent);
-	return serialized;
-}
-	
-ClientStats Client::get_stats() const
-{
-	ClientStats stats;
-	stats.stream_id = stream_id;
-	stats.remote_addr = remote_addr;
-	stats.connect_time = connect_time;
-	stats.bytes_sent = bytes_sent;
-	return stats;
-}
-
-Stream::Stream(const string &stream_id)
-	: stream_id(stream_id),
-	  data_fd(make_tempfile("")),
-	  data_size(0),
-	  mark_pool(NULL)
-{
-	if (data_fd == -1) {
-		exit(1);
-	}
-}
-
-Stream::~Stream()
-{
-	if (data_fd != -1) {
-		int ret;
-		do {
-			ret = close(data_fd);
-		} while (ret == -1 && errno == EINTR);
-		if (ret == -1) {
-			perror("close");
-		}
-	}
-}
-
-Stream::Stream(const StreamProto &serialized)
-	: stream_id(serialized.stream_id()),
-	  header(serialized.header()),
-	  data_fd(make_tempfile(serialized.data())),
-	  data_size(serialized.data_size()),
-	  mark_pool(NULL)
-{
-	if (data_fd == -1) {
-		exit(1);
-	}
-}
-
-StreamProto Stream::serialize()
-{
-	StreamProto serialized;
-	serialized.set_header(header);
-	if (!read_tempfile(data_fd, serialized.mutable_data())) {  // Closes data_fd.
-		exit(1);
-	}
-	serialized.set_data_size(data_size);
-	serialized.set_stream_id(stream_id);
-	data_fd = -1;
-	return serialized;
-}
-
-void Stream::put_client_to_sleep(Client *client)
-{
-	sleeping_clients.push_back(client);
-}
-
-void Stream::wake_up_all_clients()
-{
-	if (to_process.empty()) {
-		swap(sleeping_clients, to_process);
-	} else {
-		to_process.insert(to_process.end(), sleeping_clients.begin(), sleeping_clients.end());
-		sleeping_clients.clear();
-	}
-}
-
 Server::Server()
 {
 	pthread_mutex_init(&mutex, NULL);
@@ -300,7 +153,13 @@ void Server::add_client(int sock)
 void Server::add_client_from_serialized(const ClientProto &client)
 {
 	MutexLock lock(&mutex);
-	Stream *stream = find_stream(client.stream_id());
+	Stream *stream;
+	map<string, Stream *>::iterator stream_it = streams.find(client.stream_id());
+	if (stream_it == streams.end()) {
+		stream = NULL;
+	} else {
+		stream = stream_it->second;
+	}
 	clients.insert(make_pair(client.sock(), Client(client, stream)));
 	Client *client_ptr = &clients[client.sock()];
 
@@ -321,17 +180,17 @@ void Server::add_client_from_serialized(const ClientProto &client)
 	}
 
 	if (client_ptr->state == Client::SENDING_DATA && 
-	    client_ptr->bytes_sent == client_ptr->stream->data_size) {
+	    client_ptr->stream_pos == client_ptr->stream->bytes_received) {
 		client_ptr->stream->put_client_to_sleep(client_ptr);
 	} else {
 		process_client(client_ptr);
 	}
 }
 
-void Server::add_stream(const string &stream_id)
+void Server::add_stream(const string &stream_id, size_t backlog_size)
 {
 	MutexLock lock(&mutex);
-	streams.insert(make_pair(stream_id, new Stream(stream_id)));
+	streams.insert(make_pair(stream_id, new Stream(stream_id, backlog_size)));
 }
 
 void Server::add_stream_from_serialized(const StreamProto &stream)
@@ -340,6 +199,13 @@ void Server::add_stream_from_serialized(const StreamProto &stream)
 	streams.insert(make_pair(stream.stream_id(), new Stream(stream)));
 }
 	
+void Server::set_backlog_size(const std::string &stream_id, size_t new_size)
+{
+	MutexLock lock(&mutex);
+	assert(streams.count(stream_id) != 0);
+	streams[stream_id]->set_backlog_size(new_size);
+}
+	
 void Server::set_header(const string &stream_id, const string &header)
 {
 	MutexLock lock(&mutex);
@@ -352,7 +218,7 @@ void Server::set_header(const string &stream_id, const string &header)
 	     ++client_it) {
 		Client *client = &client_it->second;
 		if (client->state == Client::SENDING_DATA &&
-		    client->bytes_sent == 0) {
+		    client->stream_pos == 0) {
 			construct_header(client);
 		}
 	}
@@ -371,50 +237,6 @@ void Server::add_data_deferred(const string &stream_id, const char *data, size_t
 	queued_data[stream_id].append(string(data, data + bytes));
 }
 
-void Server::add_data(const string &stream_id, const char *data, ssize_t bytes)
-{
-	Stream *stream = find_stream(stream_id);
-	size_t pos = stream->data_size % BACKLOG_SIZE;
-	stream->data_size += bytes;
-
-	if (pos + bytes > BACKLOG_SIZE) {
-		ssize_t to_copy = BACKLOG_SIZE - pos;
-		while (to_copy > 0) {
-			int ret = pwrite(stream->data_fd, data, to_copy, pos);
-			if (ret == -1 && errno == EINTR) {
-				continue;
-			}
-			if (ret == -1) {
-				perror("pwrite");
-				// Dazed and confused, but trying to continue...
-				break;
-			}
-			pos += ret;
-			data += ret;
-			to_copy -= ret;
-			bytes -= ret;
-		}
-		pos = 0;
-	}
-
-	while (bytes > 0) {
-		int ret = pwrite(stream->data_fd, data, bytes, pos);
-		if (ret == -1 && errno == EINTR) {
-			continue;
-		}
-		if (ret == -1) {
-			perror("pwrite");
-			// Dazed and confused, but trying to continue...
-			break;
-		}
-		pos += ret;
-		data += ret;
-		bytes -= ret;
-	}
-
-	stream->wake_up_all_clients();
-}
-
 // See the .h file for postconditions after this function.	
 void Server::process_client(Client *client)
 {
@@ -523,7 +345,7 @@ sending_header_or_error_again:
 		// but we'll start sending immediately as we get data.
 		// This is postcondition #3.
 		client->state = Client::SENDING_DATA;
-		client->bytes_sent = client->stream->data_size;
+		client->stream_pos = client->stream->bytes_received;
 		client->stream->put_client_to_sleep(client);
 		return;
 	}
@@ -532,28 +354,30 @@ sending_data_again:
 		// See if there's some data we've lost. Ideally, we should drop to a block boundary,
 		// but resync will be the mux's problem.
 		Stream *stream = client->stream;
-		size_t bytes_to_send = stream->data_size - client->bytes_sent;
+		size_t bytes_to_send = stream->bytes_received - client->stream_pos;
 		if (bytes_to_send == 0) {
 			return;
 		}
-		if (bytes_to_send > BACKLOG_SIZE) {
+		if (bytes_to_send > stream->backlog_size) {
 			fprintf(stderr, "WARNING: fd %d lost %lld bytes, maybe too slow connection\n",
 			        client->sock,
-			        (long long int)(bytes_to_send - BACKLOG_SIZE));
-			client->bytes_sent = stream->data_size - BACKLOG_SIZE;
-			bytes_to_send = BACKLOG_SIZE;
+			        (long long int)(bytes_to_send - stream->backlog_size));
+			client->stream_pos = stream->bytes_received - stream->backlog_size;
+			client->bytes_lost += bytes_to_send - stream->backlog_size;
+			++client->num_loss_events;
+			bytes_to_send = stream->backlog_size;
 		}
 
 		// See if we need to split across the circular buffer.
 		bool more_data = false;
-		if ((client->bytes_sent % BACKLOG_SIZE) + bytes_to_send > BACKLOG_SIZE) {
-			bytes_to_send = BACKLOG_SIZE - (client->bytes_sent % BACKLOG_SIZE);
+		if ((client->stream_pos % stream->backlog_size) + bytes_to_send > stream->backlog_size) {
+			bytes_to_send = stream->backlog_size - (client->stream_pos % stream->backlog_size);
 			more_data = true;
 		}
 
 		ssize_t ret;
 		do {
-			loff_t offset = client->bytes_sent % BACKLOG_SIZE;
+			loff_t offset = client->stream_pos % stream->backlog_size;
 			ret = sendfile(client->sock, stream->data_fd, &offset, bytes_to_send);
 		} while (ret == -1 && errno == EINTR);
 
@@ -569,13 +393,14 @@ sending_data_again:
 			close_client(client);
 			return;
 		}
+		client->stream_pos += ret;
 		client->bytes_sent += ret;
 
-		if (client->bytes_sent == stream->data_size) {
+		if (client->stream_pos == stream->bytes_received) {
 			// We don't have any more data for this client, so put it to sleep.
 			// This is postcondition #3.
 			stream->put_client_to_sleep(client);
-		} else if (more_data) {
+		} else if (more_data && ret == bytes_to_send) {
 			goto sending_data_again;
 		}
 		break;
@@ -715,7 +540,9 @@ void Server::process_queued_data()
 	for (map<string, string>::iterator queued_it = queued_data.begin();
 	     queued_it != queued_data.end();
 	     ++queued_it) {
-		add_data(queued_it->first, queued_it->second.data(), queued_it->second.size());
+		Stream *stream = find_stream(queued_it->first);
+		stream->add_data(queued_it->second.data(), queued_it->second.size());
+		stream->wake_up_all_clients();
 	}
 	queued_data.clear();
 }