#include <arpa/inet.h>
#include <curl/curl.h>
#include <sys/socket.h>
+#include <pthread.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/epoll.h>
+#include <signal.h>
+#include <errno.h>
#include <vector>
#include <string>
#include <map>
+
#include "metacube.h"
+#include "server.h"
+#include "input.h"
+#include "state.pb.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;
-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();
- void curl_callback(char *ptr, size_t bytes);
-
-private:
- void process_block(const char *data, uint32_t size, uint32_t flags);
- void drop_pending_data(size_t num_bytes);
-
- // 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()
- : has_metacube_header(false)
+Server *servers = NULL;
+volatile bool hupped = false;
+
+void hup(int ignored)
{
+ hupped = true;
}
-
-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;
- }
- }
- }
+int create_server_socket(int port)
+{
+ int server_sock = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP);
+ if (server_sock == -1) {
+ perror("socket");
+ exit(1);
+ }
- // 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);
+ int one = 1;
+ if (setsockopt(server_sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) {
+ perror("setsockopt(SO_REUSEADDR)");
+ exit(1);
+ }
- // See if we have the entire block. If not, wait for more data.
- if (pending_data.size() < sizeof(metacube_block_header) + size) {
- return;
- }
+ // 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);
+ }
- process_block(pending_data.data(), size, flags);
+ sockaddr_in6 addr;
+ memset(&addr, 0, sizeof(addr));
+ addr.sin6_family = AF_INET6;
+ addr.sin6_port = htons(port);
- // 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);
+ if (bind(server_sock, reinterpret_cast<sockaddr *>(&addr), sizeof(addr)) == -1) {
+ perror("bind");
+ exit(1);
}
-}
-
-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) {
- return;
+
+ if (listen(server_sock, 128) == -1) {
+ perror("listen");
+ exit(1);
}
- 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);
+
+ return server_sock;
}
-size_t curl_callback(char *ptr, size_t size, size_t nmemb, void *userdata)
+void *acceptor_thread_run(void *arg)
{
- Input *input = static_cast<Input *>(userdata);
- size_t bytes = size * nmemb;
- input->curl_callback(ptr, bytes);
- return bytes;
+ int server_sock = int(intptr_t(arg));
+ int num_accepted = 0;
+ for ( ;; ) {
+ sockaddr_in6 addr;
+ socklen_t addrlen = sizeof(addr);
+
+ // Get a new socket.
+ int sock = accept(server_sock, reinterpret_cast<sockaddr *>(&addr), &addrlen);
+ if (sock == -1 && errno == EINTR) {
+ continue;
+ }
+ if (sock == -1) {
+ perror("accept");
+ exit(1);
+ }
+
+ // Set the socket as nonblocking.
+ int one = 1;
+ if (ioctl(sock, FIONBIO, &one) == -1) {
+ perror("FIONBIO");
+ exit(1);
+ }
+
+ // Pick a server, round-robin, and hand over the socket to it.
+ servers[num_accepted % NUM_SERVERS].add_client(sock);
+ ++num_accepted;
+ }
}
int main(int argc, char **argv)
{
- 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_WRITEFUNCTION, curl_callback);
- curl_easy_setopt(curl, CURLOPT_WRITEDATA, &input);
- curl_easy_perform(curl);
+ servers = new Server[NUM_SERVERS];
+ for (int i = 0; i < NUM_SERVERS; ++i) {
+ servers[i].add_stream(STREAM_ID);
+ 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(STREAM_ID, STREAM_URL);
+ input.run();
+
+ signal(SIGHUP, hup);
+
+ while (!hupped) {
+ usleep(100000);
+ }
+
+ input.stop();
+
+ CubemapStateProto state;
+ for (int i = 0; i < NUM_SERVERS; ++i) {
+ servers[i].stop();
+
+ CubemapStateProto local_state = servers[i].serialize();
+
+ // The stream state should be identical between the servers, so we only store it once.
+ if (i == 0) {
+ state.mutable_streams()->MergeFrom(local_state.streams());
+ }
+ for (int j = 0; j < local_state.clients_size(); ++j) {
+ state.add_clients()->MergeFrom(local_state.clients(j));
+ }
+ }
+ delete[] servers;
+
+ printf("SERIALIZED: [%s]\n", state.DebugString().c_str());
}
projects / cubemap / blobdiff