-#include <stdio.h>
-#include <string.h>
-#include <stdint.h>
-#include <assert.h>
-#include <arpa/inet.h>
-#include <sys/socket.h>
-#include <pthread.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#include <poll.h>
-#include <errno.h>
-#include <vector>
+#include <stddef.h>
#include <string>
-#include <map>
-#include "metacube.h"
-#include "mutexlock.h"
+#include "httpinput.h"
#include "input.h"
-#include "server.h"
-#include "serverpool.h"
-#include "parse.h"
#include "state.pb.h"
+#include "udpinput.h"
using namespace std;
-extern ServerPool *servers;
-
+namespace {
+
+// Does not support passwords, only user:host, since this is really only used
+// to parse VLC's udp://source@multicastgroup:1234/ syntax (we do not support
+// even basic auth).
+void split_user_host(const string &user_host, string *user, string *host)
+{
+ size_t split = user_host.find("@");
+ if (split == string::npos) {
+ user->clear();
+ *host = user_host;
+ } else {
+ *user = string(user_host.begin(), user_host.begin() + split);
+ *host = string(user_host.begin() + split + 1, user_host.end());
+ }
+}
+
+} // namespace
+
// Extremely rudimentary URL parsing.
-bool parse_url(const string &url, string *host, string *port, string *path)
+bool parse_url(const string &url, string *protocol, string *user, string *host, string *port, string *path)
{
- if (url.find("http://") != 0) {
+ size_t split = url.find("://");
+ if (split == string::npos) {
return false;
}
-
- string rest = url.substr(strlen("http://"));
- size_t split = rest.find_first_of(":/");
- if (split == string::npos) {
+ *protocol = string(url.begin(), url.begin() + split);
+
+ string rest = string(url.begin() + split + 3, url.end());
+
+ // Split at the first slash, or the first colon that's not within [].
+ bool within_brackets = false;
+ for (split = 0; split < rest.size(); ++split) {
+ if (rest[split] == '[') {
+ if (within_brackets) {
+ // Can't nest brackets.
+ return false;
+ }
+ within_brackets = true;
+ } else if (rest[split] == ']') {
+ if (!within_brackets) {
+ // ] without matching [.
+ return false;
+ }
+ within_brackets = false;
+ } else if (rest[split] == '/') {
+ break;
+ } else if (rest[split] == ':' && !within_brackets) {
+ break;
+ }
+ }
+
+ if (split == rest.size()) {
// http://foo
- *host = rest;
- *port = "http";
+ split_user_host(rest, user, host);
+ *port = *protocol;
*path = "/";
return true;
}
- *host = string(rest.begin(), rest.begin() + split);
+ split_user_host(string(rest.begin(), rest.begin() + split), user, host);
char ch = rest[split]; // Colon or slash.
rest = string(rest.begin() + split + 1, rest.end());
}
// http://foo/bar
- *port = "http";
- *path = rest;
+ *port = *protocol;
+ *path = "/" + rest;
return true;
}
-Input::Input(const string &stream_id, const string &url)
- : state(NOT_CONNECTED),
- stream_id(stream_id),
- url(url),
- has_metacube_header(false),
- sock(-1)
-{
-}
-
-Input::Input(const InputProto &serialized)
- : state(State(serialized.state())),
- stream_id(serialized.stream_id()),
- url(serialized.url()),
- request(serialized.request()),
- request_bytes_sent(serialized.request_bytes_sent()),
- response(serialized.response()),
- has_metacube_header(serialized.has_metacube_header()),
- sock(serialized.sock())
-{
- pending_data.resize(serialized.pending_data().size());
- memcpy(&pending_data[0], serialized.pending_data().data(), serialized.pending_data().size());
-
- parse_url(url, &host, &port, &path); // Don't care if it fails.
-}
-
-InputProto Input::serialize() const
+Input *create_input(const std::string &url)
{
- InputProto serialized;
- serialized.set_state(state);
- serialized.set_stream_id(stream_id);
- serialized.set_url(url);
- serialized.set_request(request);
- serialized.set_request_bytes_sent(request_bytes_sent);
- serialized.set_response(response);
- serialized.set_pending_data(string(pending_data.begin(), pending_data.end()));
- serialized.set_has_metacube_header(has_metacube_header);
- serialized.set_sock(sock);
- return serialized;
-}
-
-void Input::run()
-{
- should_stop = false;
-
- // Joinable is already the default, but it's good to be certain.
- pthread_attr_t attr;
- pthread_attr_init(&attr);
- pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
- pthread_create(&worker_thread, &attr, Input::do_work_thunk, this);
-}
-
-void Input::stop()
-{
- should_stop = true;
-
- if (pthread_join(worker_thread, NULL) == -1) {
- perror("pthread_join");
- exit(1);
+ string protocol, user, host, port, path;
+ if (!parse_url(url, &protocol, &user, &host, &port, &path)) {
+ return NULL;
}
-}
-
-void *Input::do_work_thunk(void *arg)
-{
- Input *input = static_cast<Input *>(arg);
- input->do_work();
- return NULL;
-}
-
-int Input::lookup_and_connect(const string &host, const string &port)
-{
- addrinfo *ai;
- int err = getaddrinfo(host.c_str(), port.c_str(), NULL, &ai);
- if (err == -1) {
- fprintf(stderr, "WARNING: Lookup of '%s' failed (%s).\n",
- host.c_str(), gai_strerror(err));
- freeaddrinfo(ai);
- return -1;
+ if (protocol == "http") {
+ return new HTTPInput(url);
}
-
- // Connect to everything in turn until we have a socket.
- while (ai && !should_stop) {
- int sock = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
- if (sock == -1) {
- // Could be e.g. EPROTONOSUPPORT. The show must go on.
- continue;
- }
-
- do {
- err = connect(sock, ai->ai_addr, ai->ai_addrlen);
- } while (err == -1 && errno == EINTR);
-
- if (err != -1) {
- freeaddrinfo(ai);
- return sock;
- }
-
- ai = ai->ai_next;
+ if (protocol == "udp") {
+ return new UDPInput(url);
}
-
- // Give the last one as error.
- fprintf(stderr, "WARNING: Connect to '%s' failed (%s)\n",
- host.c_str(), strerror(errno));
- freeaddrinfo(ai);
- return -1;
+ return NULL;
}
-void Input::do_work()
+Input *create_input(const InputProto &serialized)
{
- while (!should_stop) {
- if (state == SENDING_REQUEST || state == RECEIVING_HEADER || state == RECEIVING_DATA) {
- // Since we are non-blocking, we need to wait for the right state first.
- // Wait up to 50 ms, then check should_stop.
- pollfd pfd;
- pfd.fd = sock;
- pfd.events = (state == SENDING_REQUEST) ? POLLOUT : POLLIN;
- pfd.events |= POLLRDHUP;
-
- int nfds = poll(&pfd, 1, 50);
- if (nfds == 0 || (nfds == -1 && errno == EAGAIN)) {
- continue;
- }
- if (nfds == -1) {
- perror("poll");
- state = CLOSING_SOCKET;
- }
- }
-
- switch (state) {
- case NOT_CONNECTED:
- request.clear();
- request_bytes_sent = 0;
- response.clear();
-
- if (!parse_url(url, &host, &port, &path)) {
- fprintf(stderr, "Failed to parse URL '%s'\n", url.c_str());
- break;
- }
-
- sock = lookup_and_connect(host, port);
- if (sock != -1) {
- // Yay, successful connect. Try to set it as nonblocking.
- int one = 1;
- if (ioctl(sock, FIONBIO, &one) == -1) {
- perror("ioctl(FIONBIO)");
- state = CLOSING_SOCKET;
- } else {
- state = SENDING_REQUEST;
- request = "GET " + path + " HTTP/1.0\r\nUser-Agent: cubemap\r\n\r\n";
- request_bytes_sent = 0;
- }
- }
- break;
- case SENDING_REQUEST: {
- size_t to_send = request.size() - request_bytes_sent;
- int ret;
-
- do {
- ret = write(sock, request.data() + request_bytes_sent, to_send);
- } while (ret == -1 && errno == EINTR);
-
- if (ret == -1) {
- perror("write");
- state = CLOSING_SOCKET;
- continue;
- }
-
- assert(ret >= 0);
- request_bytes_sent += ret;
-
- if (request_bytes_sent == request.size()) {
- state = RECEIVING_HEADER;
- }
- break;
- }
- case RECEIVING_HEADER: {
- char buf[4096];
- int ret;
-
- do {
- ret = read(sock, buf, sizeof(buf));
- } while (ret == -1 && errno == EINTR);
-
- if (ret == -1) {
- perror("read");
- state = CLOSING_SOCKET;
- continue;
- }
-
- if (ret == 0) {
- // This really shouldn't happen...
- fprintf(stderr, "Socket unexpectedly closed while reading header\n");
- state = CLOSING_SOCKET;
- continue;
- }
-
- RequestParseStatus status = wait_for_double_newline(&response, buf, ret);
-
- if (status == RP_OUT_OF_SPACE) {
- fprintf(stderr, "WARNING: fd %d sent overlong response!\n", sock);
- state = CLOSING_SOCKET;
- continue;
- } else if (status == RP_NOT_FINISHED_YET) {
- continue;
- }
-
- // OK, so we're fine, but there might be some of the actual data after the response.
- // We'll need to deal with that separately.
- string extra_data;
- if (status == RP_EXTRA_DATA) {
- char *ptr = static_cast<char *>(
- memmem(response.data(), response.size(), "\r\n\r\n", 4));
- assert(ptr != NULL);
- extra_data = string(ptr, &response[0] + response.size());
- response.resize(ptr - response.data());
- }
-
- // TODO: Check that the response is 200, save the headers, etc.
-
- if (!extra_data.empty()) {
- process_data(&extra_data[0], extra_data.size());
- }
-
- state = RECEIVING_DATA;
- break;
- }
- case RECEIVING_DATA: {
- char buf[4096];
- int ret;
-
- do {
- ret = read(sock, buf, sizeof(buf));
- } while (ret == -1 && errno == EINTR);
-
- if (ret == -1) {
- perror("read");
- state = CLOSING_SOCKET;
- continue;
- }
-
- if (ret == 0) {
- // This really shouldn't happen...
- fprintf(stderr, "Socket unexpectedly closed while reading header\n");
- state = CLOSING_SOCKET;
- continue;
- }
-
- process_data(buf, ret);
- break;
- }
- case CLOSING_SOCKET: {
- int err;
- do {
- err = close(sock);
- } while (err == -1 && errno == EINTR);
-
- if (err == -1) {
- perror("close");
- }
-
- state = NOT_CONNECTED;
- break;
- }
- default:
- assert(false);
- }
-
- // If we are still in NOT_CONNECTED, either something went wrong,
- // or the connection just got closed.
- // The earlier steps have already given the error message, if any.
- if (state == NOT_CONNECTED && !should_stop) {
- fprintf(stderr, "Waiting 0.2 second and restarting...\n");
- usleep(200000);
- }
+ string protocol, user, host, port, path;
+ if (!parse_url(serialized.url(), &protocol, &user, &host, &port, &path)) {
+ return NULL;
}
-}
-
-void Input::process_data(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;
- }
-
- // Send this block on to the data.
- char *inner_data = pending_data.data() + sizeof(metacube_block_header);
- if (flags & METACUBE_FLAGS_HEADER) {
- string header(inner_data, inner_data + size);
- servers->set_header(stream_id, header);
- } else {
- servers->add_data(stream_id, inner_data, size);
- }
-
- // Consume the 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);
- has_metacube_header = false;
+ if (protocol == "http") {
+ return new HTTPInput(serialized);
}
-}
-
-void Input::drop_pending_data(size_t num_bytes)
-{
- if (num_bytes == 0) {
- return;
+ if (protocol == "udp") {
+ return new UDPInput(serialized);
}
- 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 NULL;
}
+Input::~Input() {}
+
projects / cubemap / blobdiff