X-Git-Url: https://git.sesse.net/?p=cubemap;a=blobdiff_plain;f=cubemap.cpp;h=692d48baf1d9e507d36926aa10a7f35f7d8847b1;hp=643f1a8b0b6c7a0e1bc274a47ae65ebf7e18df76;hb=f3e2d52ccf79454ee157917f9017263a8f4c50c3;hpb=2bd0c02ac79dc8bc0da62b27d6b1e9f3cea525c6

diff --git a/cubemap.cpp b/cubemap.cpp
index 643f1a8..692d48b 100644
--- a/cubemap.cpp
+++ b/cubemap.cpp
@@ -13,303 +13,20 @@
 #include <vector>
 #include <string>
 #include <map>
+
 #include "metacube.h"
+#include "server.h"
+#include "input.h"
 
 #define NUM_SERVERS 4
 #define STREAM_ID "stream"
 #define STREAM_URL "http://gruessi.zrh.sesse.net:4013/"
-#define BACKLOG_SIZE 1048576
 #define PORT 9094
 
 using namespace std;
 
-// Locks a pthread mutex, RAII-style.
-class MutexLock {
-public:
-	MutexLock(pthread_mutex_t *mutex);
-	~MutexLock();
-
-private:
-	pthread_mutex_t *mutex;
-};
-	
-MutexLock::MutexLock(pthread_mutex_t *mutex)
-	: mutex(mutex)
-{
-	pthread_mutex_lock(mutex);
-}
-
-MutexLock::~MutexLock()
-{
-	pthread_mutex_unlock(mutex);
-}
-
-struct Client {
-	enum State { READING_REQUEST, SENDING_HEADER, SENDING_DATA };
-	State state;
-
-	// The HTTP request, as sent by the client. If we are in READING_REQUEST,
-	// this might not be finished.
-	string client_request;
-
-#if 0
-	// What stream we're connecting to; parsed from client_request.
-	// Not relevant for READING_REQUEST.
-	string stream_id;
-#endif
-
-	// Number of bytes we've sent of the header. Only relevant for SENDING_HEADER.
-	size_t header_bytes_sent;
-
-	// Number of bytes we've sent of data. Only relevant for SENDING_DATA.
-	size_t bytes_sent;
-};
-
-struct Stream {
-	// The HTTP response header, plus the video stream header (if any).
-	string header;
-
-	// The stream data itself, stored in a circular buffer.
-	char data[BACKLOG_SIZE];
-
-	// How many bytes <data> contains. Can very well be larger than BACKLOG_SIZE,
-	// since the buffer wraps.
-	size_t data_size;
-};
-
-class Server {
-public:
-	Server();
-
-	// Start a new thread that handles clients.
-	void run();
-	void add_client(int sock);
-	void add_stream(const string &stream_id);
-	void set_header(const string &stream_id, const string &header);
-	void add_data(const string &stream_id, const char *data, size_t bytes);
-
-private:
-	pthread_mutex_t mutex;
-
-	// Map from stream ID to stream.
-	map<string, Stream> streams;
-
-	// Map from file descriptor to client.
-	map<int, Client> clients;
-
-	int epoll_fd;
-
-	// Recover the this pointer, and call do_work().
-	static void *do_work_thunk(void *arg);
-
-	// The actual worker thread.
-	void do_work();
-};
-
 Server *servers = NULL;
 
-Server::Server()
-{
-	pthread_mutex_init(&mutex, NULL);
-
-	epoll_fd = epoll_create(1024);  // Size argument is ignored.
-	if (epoll_fd == -1) {
-		perror("epoll_fd");
-		exit(1);
-	}
-}
-
-void Server::run()
-{
-	pthread_t thread;
-	pthread_create(&thread, NULL, Server::do_work_thunk, this);
-}
-
-void *Server::do_work_thunk(void *arg)
-{
-	Server *server = static_cast<Server *>(arg);
-	server->do_work();
-	return NULL;
-}
-
-void Server::do_work()
-{
-	for ( ;; ) {
-		MutexLock lock(&mutex);
-		printf("server thread running\n");
-		sleep(1);
-	}
-}
-	
-void Server::add_client(int sock)
-{
-	MutexLock lock(&mutex);
-	Client new_client;
-	new_client.state = Client::READING_REQUEST;
-	new_client.header_bytes_sent = 0;
-	new_client.bytes_sent = 0;
-
-	clients.insert(make_pair(sock, new_client));
-
-	// Start listening on data from this socket.
-	epoll_event ev;
-	ev.events = EPOLLIN;
-	ev.data.fd = sock;
-	if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, sock, &ev) == -1) {
-		perror("epoll_ctl(EPOLL_CTL_ADD)");
-		exit(1);
-	}
-}
-	
-void Server::add_stream(const string &stream_id)
-{
-	// TODO
-}
-	
-void Server::set_header(const string &stream_id, const string &header)
-{
-	// TODO
-	printf("got header! %lu bytes\n", header.size());
-}
-	
-void Server::add_data(const string &stream_id, const char *data, size_t bytes)
-{
-	// TODO
-}
-
-class Input {
-public:
-	Input(const string &stream_id);
-
-	// Connect to the given URL and start streaming.
-	// WARNING: Currently this blocks; it does not run in a separate thread!
-	void run(const string &url);
-
-private:
-	// Recovers the this pointer and calls curl_callback().
-	static size_t curl_callback_thunk(char *ptr, size_t size, size_t nmemb, void *userdata);
-
-	// Stores the given data, looks for Metacube blocks (skipping data if needed),
-	// and calls process_block() for each one.
-	void curl_callback(char *ptr, size_t bytes);
-	void process_block(const char *data, uint32_t size, uint32_t flags);
-
-	// Drops <num_bytes> bytes from the head of <pending_data>,
-	// and outputs a warning.
-	void drop_pending_data(size_t num_bytes);
-
-	string stream_id;
-
-	// Data we have received but not fully processed yet.
-	vector<char> pending_data;
-
-	// If <pending_data> starts with a Metacube header,
-	// this is true.
-	bool has_metacube_header;
-};
-
-Input::Input(const string &stream_id)
-	: stream_id(stream_id),
-	  has_metacube_header(false)
-{
-}
-
-void Input::run(const string &url)
-{
-	CURL *curl = curl_easy_init();
-	curl_easy_setopt(curl, CURLOPT_URL, STREAM_URL);
-	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, &Input::curl_callback_thunk);
-	curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
-	curl_easy_perform(curl);
-}
-
-size_t Input::curl_callback_thunk(char *ptr, size_t size, size_t nmemb, void *userdata)
-{
-	Input *input = static_cast<Input *>(userdata);
-	size_t bytes = size * nmemb;
-	input->curl_callback(ptr, bytes);	
-	return bytes;
-}
-	
-void Input::curl_callback(char *ptr, size_t bytes)
-{
-	pending_data.insert(pending_data.end(), ptr, ptr + bytes);
-
-	for ( ;; ) {
-		// If we don't have enough data (yet) for even the Metacube header, just return.
-		if (pending_data.size() < sizeof(metacube_block_header)) {
-			return;
-		}
-
-		// Make sure we have the Metacube sync header at the start.
-		// We may need to skip over junk data (it _should_ not happen, though).
-		if (!has_metacube_header) {
-			char *ptr = static_cast<char *>(
-				memmem(pending_data.data(), pending_data.size(),
-				       METACUBE_SYNC, strlen(METACUBE_SYNC)));
-			if (ptr == NULL) {
-				// OK, so we didn't find the sync marker. We know then that
-				// we do not have the _full_ marker in the buffer, but we
-				// could have N-1 bytes. Drop everything before that,
-				// and then give up.
-				drop_pending_data(pending_data.size() - (strlen(METACUBE_SYNC) - 1));
-				return;
-			} else {
-				// Yay, we found the header. Drop everything (if anything) before it.
-				drop_pending_data(ptr - pending_data.data());
-				has_metacube_header = true;
-
-				// Re-check that we have the entire header; we could have dropped data.
-				if (pending_data.size() < sizeof(metacube_block_header)) {
-					return;
-				}
-			}
-		}
-
-		// Now it's safe to read the header.
-		metacube_block_header *hdr = reinterpret_cast<metacube_block_header *>(pending_data.data());	
-		assert(memcmp(hdr->sync, METACUBE_SYNC, sizeof(hdr->sync)) == 0);
-		uint32_t size = ntohl(hdr->size);
-		uint32_t flags = ntohl(hdr->flags);
-
-		// See if we have the entire block. If not, wait for more data.
-		if (pending_data.size() < sizeof(metacube_block_header) + size) {
-			return;
-		}
-
-		process_block(pending_data.data(), size, flags);
-
-		// Consume this block. This isn't the most efficient way of dealing with things
-		// should we have many blocks, but these routines don't need to be too efficient
-		// anyway.
-		pending_data.erase(pending_data.begin(), pending_data.begin() + sizeof(metacube_block_header) + size);
-	}
-}
-		
-void Input::process_block(const char *data, uint32_t size, uint32_t flags)
-{	
-	if (flags & METACUBE_FLAGS_HEADER) {
-		string header(data, data + size);
-		for (int i = 0; i < NUM_SERVERS; ++i) {
-			servers[i].set_header(stream_id, header);
-		}
-	} else { 
-		for (int i = 0; i < NUM_SERVERS; ++i) {
-			servers[i].add_data(stream_id, data, size);
-		}
-	}
-}
-
-void Input::drop_pending_data(size_t num_bytes)
-{
-	if (num_bytes == 0) {
-		return;
-	}
-	fprintf(stderr, "Warning: Dropping %lld junk bytes from stream, maybe it is not a Metacube stream?\n",
-		(long long)num_bytes);
-	pending_data.erase(pending_data.begin(), pending_data.begin() + num_bytes);
-}
-
 int create_server_socket(int port)
 {
 	int server_sock = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP);
@@ -318,6 +35,12 @@ int create_server_socket(int port)
 		exit(1);
 	}
 
+	int one = 1;
+	if (setsockopt(server_sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) {
+		perror("setsockopt(SO_REUSEADDR)");
+		exit(1);
+	}
+
 	// We want dual-stack sockets. (Sorry, OpenBSD and Windows XP...)
 	int zero = 0;
 	if (setsockopt(server_sock, IPPROTO_IPV6, IPV6_V6ONLY, &zero, sizeof(zero)) == -1) {
@@ -389,4 +112,9 @@ int main(int argc, char **argv)
 
 	Input input(STREAM_ID);
 	input.run(STREAM_URL);
+
+	for (int i = 0; i < NUM_SERVERS; ++i) {
+		servers[i].stop();
+	}
+	delete[] servers;
 }