X-Git-Url: https://git.sesse.net/?p=cubemap;a=blobdiff_plain;f=cubemap.cpp;h=9f5e42e6a23b0f5cff0c37b3fecaded17b13b522;hp=cbdab184dc7f5e3be2c098b65884ab4a1083c4b1;hb=c555641af6f4021d744a50abd5084a174614dd54;hpb=a81b4cc30ee05292bdc3177680e5d7efbf09fa1f

diff --git a/cubemap.cpp b/cubemap.cpp
index cbdab18..9f5e42e 100644
--- a/cubemap.cpp
+++ b/cubemap.cpp
@@ -4,11 +4,125 @@
 #include <assert.h>
 #include <arpa/inet.h>
 #include <curl/curl.h>
+#include <sys/socket.h>
+#include <pthread.h>
+#include <sys/types.h>
+#include <errno.h>
 #include <vector>
+#include <string>
+#include <map>
 #include "metacube.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_socket(int server_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<string, Stream> streams;
+
+	// Recover the this pointer, and call do_work().
+	static void *do_work_thunk(void *arg);
+
+	// The actual worker thread.
+	void do_work();
+};
+
+Server::Server()
+{
+	pthread_mutex_init(&mutex, NULL);
+}
+
+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 ( ;; ) {
+		printf("server thread running\n");
+		sleep(1);
+	}
+}
+
 class Input {
 public:
 	Input();
@@ -91,7 +205,7 @@ void Input::process_block(const char *data, uint32_t size, uint32_t flags)
 	// TODO: treat it right here
 	printf("Block: %d bytes, flags=0x%x\n", size, flags);
 }
-			
+
 void Input::drop_pending_data(size_t num_bytes)
 {
 	if (num_bytes == 0) {
@@ -110,12 +224,76 @@ size_t curl_callback(char *ptr, size_t size, size_t nmemb, void *userdata)
 	return bytes;
 }
 
+int create_server_socket(int port)
+{
+	int server_sock = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP);
+	if (server_sock == -1) {
+		perror("socket");
+		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) {
+		perror("setsockopt(IPV6_V6ONLY)");
+		exit(1);
+	}
+
+	sockaddr_in6 addr;
+	memset(&addr, 0, sizeof(addr));
+	addr.sin6_family = AF_INET6;
+	addr.sin6_port = htons(port);
+
+	if (bind(server_sock, reinterpret_cast<sockaddr *>(&addr), sizeof(addr)) == -1) {
+		perror("bind");
+		exit(1);
+	}
+
+	if (listen(server_sock, 128) == -1) {
+		perror("listen");
+		exit(1);
+	}
+
+	return server_sock;
+}
+
+void *acceptor_thread_run(void *arg)
+{
+	int server_sock = int(intptr_t(arg));
+	for ( ;; ) {
+		sockaddr_in6 addr;
+		socklen_t addrlen = sizeof(addr);
+
+		int sock = accept(server_sock, reinterpret_cast<sockaddr *>(&addr), &addrlen);
+		if (sock == -1 && errno == EINTR) {
+			continue;
+		}
+		if (sock == -1) {
+			perror("accept");
+			exit(1);
+		}
+
+		printf("got a socket yaaaay\n");
+	}
+}
+
+Server *servers = NULL;
+
 int main(int argc, char **argv)
 {
+	servers = new Server[NUM_SERVERS];
+	for (int i = 0; i < NUM_SERVERS; ++i) {
+		servers[i].run();
+	}
+
+	int server_sock = create_server_socket(PORT);
+
+	pthread_t acceptor_thread;
+	pthread_create(&acceptor_thread, NULL, acceptor_thread_run, reinterpret_cast<void *>(server_sock));
+
 	Input input;
 	CURL *curl = curl_easy_init();
-	curl_easy_setopt(curl, CURLOPT_URL, "http://gruessi.zrh.sesse.net:4013/");
-	// curl_easy_setopt(curl, CURLOPT_URL, "http://www.google.com/");
+	curl_easy_setopt(curl, CURLOPT_URL, STREAM_URL);
 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_callback);
 	curl_easy_setopt(curl, CURLOPT_WRITEDATA, &input);
 	curl_easy_perform(curl);