Open a server socket, and listen on it.

[cubemap] / cubemap.cpp

diff --git a/cubemap.cpp b/cubemap.cpp
index cbdab184dc7f5e3be2c098b65884ab4a1083c4b1..b02121d78b8b6013fbafd2942cadee6f35192fa2 100644 (file)
--- a/cubemap.cpp
+++ b/cubemap.cpp
@@ -4,11 +4,66 @@
 #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
+
 using namespace std;
 
+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:
+       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:
+       map<string, Stream> streams;
+};
+
 class Input {
 public:
        Input();
@@ -110,12 +165,74 @@ 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");
+       }
+}
+
 int main(int argc, char **argv)
 {
+       for (int i = 0; i < NUM_SERVERS; ++i) {
+               Server *s = new Server;
+               //s->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);