-#include <stdio.h>
-#include <string.h>
-#include <stdint.h>
-#include <unistd.h>
#include <assert.h>
-#include <arpa/inet.h>
-#include <sys/socket.h>
+#include <errno.h>
#include <pthread.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
+#include <stdio.h>
+#include <stdlib.h>
#include <sys/epoll.h>
#include <sys/sendfile.h>
-#include <time.h>
-#include <signal.h>
-#include <errno.h>
-#include <vector>
-#include <string>
-#include <map>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
#include <algorithm>
+#include <map>
+#include <string>
+#include <utility>
+#include <vector>
+#include "accesslog.h"
+#include "log.h"
#include "markpool.h"
-#include "metacube.h"
-#include "server.h"
#include "mutexlock.h"
#include "parse.h"
-#include "util.h"
+#include "server.h"
#include "state.pb.h"
+#include "stream.h"
using namespace std;
-Client::Client(int sock)
- : sock(sock),
- fwmark(0),
- connect_time(time(NULL)),
- state(Client::READING_REQUEST),
- stream(NULL),
- header_or_error_bytes_sent(0),
- bytes_sent(0)
-{
- request.reserve(1024);
-
- // Find the remote address, and convert it to ASCII.
- sockaddr_in6 addr;
- socklen_t addr_len = sizeof(addr);
-
- if (getpeername(sock, reinterpret_cast<sockaddr *>(&addr), &addr_len) == -1) {
- perror("getpeername");
- remote_addr = "";
- } else {
- char buf[INET6_ADDRSTRLEN];
- if (inet_ntop(addr.sin6_family, &addr.sin6_addr, buf, sizeof(buf)) == NULL) {
- perror("inet_ntop");
- remote_addr = "";
- } else {
- remote_addr = buf;
- }
- }
-}
-
-Client::Client(const ClientProto &serialized, Stream *stream)
- : sock(serialized.sock()),
- remote_addr(serialized.remote_addr()),
- connect_time(serialized.connect_time()),
- state(State(serialized.state())),
- request(serialized.request()),
- stream_id(serialized.stream_id()),
- stream(stream),
- header_or_error(serialized.header_or_error()),
- header_or_error_bytes_sent(serialized.header_or_error_bytes_sent()),
- bytes_sent(serialized.bytes_sent())
-{
- if (stream->mark_pool != NULL) {
- fwmark = stream->mark_pool->get_mark();
- } else {
- fwmark = 0; // No mark.
- }
- if (setsockopt(sock, SOL_SOCKET, SO_MARK, &fwmark, sizeof(fwmark)) == -1) {
- if (fwmark != 0) {
- perror("setsockopt(SO_MARK)");
- }
- }
-}
-
-ClientProto Client::serialize() const
-{
- ClientProto serialized;
- serialized.set_sock(sock);
- serialized.set_remote_addr(remote_addr);
- serialized.set_connect_time(connect_time);
- serialized.set_state(state);
- serialized.set_request(request);
- serialized.set_stream_id(stream_id);
- serialized.set_header_or_error(header_or_error);
- serialized.set_header_or_error_bytes_sent(serialized.header_or_error_bytes_sent());
- serialized.set_bytes_sent(bytes_sent);
- return serialized;
-}
-
-ClientStats Client::get_stats() const
-{
- ClientStats stats;
- stats.stream_id = stream_id;
- stats.remote_addr = remote_addr;
- stats.connect_time = connect_time;
- stats.bytes_sent = bytes_sent;
- return stats;
-}
-
-Stream::Stream(const string &stream_id, size_t backlog_size)
- : stream_id(stream_id),
- data_fd(make_tempfile("")),
- backlog_size(backlog_size),
- bytes_received(0),
- mark_pool(NULL)
-{
- if (data_fd == -1) {
- exit(1);
- }
-}
-
-Stream::~Stream()
-{
- if (data_fd != -1) {
- int ret;
- do {
- ret = close(data_fd);
- } while (ret == -1 && errno == EINTR);
- if (ret == -1) {
- perror("close");
- }
- }
-}
-
-Stream::Stream(const StreamProto &serialized)
- : stream_id(serialized.stream_id()),
- header(serialized.header()),
- data_fd(make_tempfile(serialized.data())),
- backlog_size(serialized.backlog_size()),
- bytes_received(serialized.bytes_received()),
- mark_pool(NULL)
-{
- if (data_fd == -1) {
- exit(1);
- }
-}
-
-StreamProto Stream::serialize()
-{
- StreamProto serialized;
- serialized.set_header(header);
- if (!read_tempfile(data_fd, serialized.mutable_data())) { // Closes data_fd.
- exit(1);
- }
- serialized.set_backlog_size(backlog_size);
- serialized.set_bytes_received(bytes_received);
- serialized.set_stream_id(stream_id);
- data_fd = -1;
- return serialized;
-}
-
-void Stream::put_client_to_sleep(Client *client)
-{
- sleeping_clients.push_back(client);
-}
-
-void Stream::wake_up_all_clients()
-{
- if (to_process.empty()) {
- swap(sleeping_clients, to_process);
- } else {
- to_process.insert(to_process.end(), sleeping_clients.begin(), sleeping_clients.end());
- sleeping_clients.clear();
- }
-}
+extern AccessLogThread *access_log;
Server::Server()
{
epoll_fd = epoll_create(1024); // Size argument is ignored.
if (epoll_fd == -1) {
- perror("epoll_fd");
+ log_perror("epoll_fd");
exit(1);
}
}
Server::~Server()
{
+ for (map<string, Stream *>::iterator stream_it = streams.begin();
+ stream_it != streams.end();
+ ++stream_it) {
+ delete stream_it->second;
+ }
+
int ret;
do {
ret = close(epoll_fd);
} while (ret == -1 && errno == EINTR);
if (ret == -1) {
- perror("close(epoll_fd)");
+ log_perror("close(epoll_fd)");
}
}
continue;
}
if (nfds == -1) {
- perror("epoll_wait");
+ log_perror("epoll_wait");
exit(1);
}
process_queued_data();
for (int i = 0; i < nfds; ++i) {
- int fd = events[i].data.fd;
- assert(clients.count(fd) != 0);
- Client *client = &clients[fd];
+ Client *client = reinterpret_cast<Client *>(events[i].data.u64);
if (events[i].events & (EPOLLERR | EPOLLRDHUP | EPOLLHUP)) {
close_client(client);
// Start listening on data from this socket.
epoll_event ev;
ev.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
- ev.data.u64 = 0; // Keep Valgrind happy.
- ev.data.fd = sock;
+ ev.data.u64 = reinterpret_cast<uint64_t>(&clients[sock]);
if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, sock, &ev) == -1) {
- perror("epoll_ctl(EPOLL_CTL_ADD)");
+ log_perror("epoll_ctl(EPOLL_CTL_ADD)");
exit(1);
}
void Server::add_client_from_serialized(const ClientProto &client)
{
MutexLock lock(&mutex);
- Stream *stream = find_stream(client.stream_id());
+ Stream *stream;
+ map<string, Stream *>::iterator stream_it = streams.find(client.stream_id());
+ if (stream_it == streams.end()) {
+ stream = NULL;
+ } else {
+ stream = stream_it->second;
+ }
clients.insert(make_pair(client.sock(), Client(client, stream)));
Client *client_ptr = &clients[client.sock()];
ev.events = EPOLLOUT | EPOLLET | EPOLLRDHUP;
}
ev.data.u64 = 0; // Keep Valgrind happy.
- ev.data.fd = client.sock();
+ ev.data.u64 = reinterpret_cast<uint64_t>(client_ptr);
if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, client.sock(), &ev) == -1) {
- perror("epoll_ctl(EPOLL_CTL_ADD)");
+ log_perror("epoll_ctl(EPOLL_CTL_ADD)");
exit(1);
}
if (client_ptr->state == Client::SENDING_DATA &&
- client_ptr->bytes_sent == client_ptr->stream->bytes_received) {
+ client_ptr->stream_pos == client_ptr->stream->bytes_received) {
client_ptr->stream->put_client_to_sleep(client_ptr);
} else {
process_client(client_ptr);
streams.insert(make_pair(stream.stream_id(), new Stream(stream)));
}
+void Server::set_backlog_size(const std::string &stream_id, size_t new_size)
+{
+ MutexLock lock(&mutex);
+ assert(streams.count(stream_id) != 0);
+ streams[stream_id]->set_backlog_size(new_size);
+}
+
void Server::set_header(const string &stream_id, const string &header)
{
MutexLock lock(&mutex);
++client_it) {
Client *client = &client_it->second;
if (client->state == Client::SENDING_DATA &&
- client->bytes_sent == 0) {
+ client->stream_pos == 0) {
construct_header(client);
}
}
queued_data[stream_id].append(string(data, data + bytes));
}
-void Server::add_data(const string &stream_id, const char *data, ssize_t bytes)
-{
- Stream *stream = find_stream(stream_id);
- size_t pos = stream->bytes_received % stream->backlog_size;
- stream->bytes_received += bytes;
-
- if (pos + bytes > stream->backlog_size) {
- ssize_t to_copy = stream->backlog_size - pos;
- while (to_copy > 0) {
- int ret = pwrite(stream->data_fd, data, to_copy, pos);
- if (ret == -1 && errno == EINTR) {
- continue;
- }
- if (ret == -1) {
- perror("pwrite");
- // Dazed and confused, but trying to continue...
- break;
- }
- pos += ret;
- data += ret;
- to_copy -= ret;
- bytes -= ret;
- }
- pos = 0;
- }
-
- while (bytes > 0) {
- int ret = pwrite(stream->data_fd, data, bytes, pos);
- if (ret == -1 && errno == EINTR) {
- continue;
- }
- if (ret == -1) {
- perror("pwrite");
- // Dazed and confused, but trying to continue...
- break;
- }
- pos += ret;
- data += ret;
- bytes -= ret;
- }
-
- stream->wake_up_all_clients();
-}
-
// See the .h file for postconditions after this function.
void Server::process_client(Client *client)
{
return;
}
if (ret == -1) {
- perror("read");
+ log_perror("read");
close_client(client);
return;
}
switch (status) {
case RP_OUT_OF_SPACE:
- fprintf(stderr, "WARNING: fd %d sent overlong request!\n", client->sock);
+ log(WARNING, "[%s] Client sent overlong request!", client->remote_addr.c_str());
close_client(client);
return;
case RP_NOT_FINISHED_YET:
// See if there's more data for us.
goto read_request_again;
case RP_EXTRA_DATA:
- fprintf(stderr, "WARNING: fd %d had junk data after request!\n", client->sock);
+ log(WARNING, "[%s] Junk data after request!", client->remote_addr.c_str());
close_client(client);
return;
case RP_FINISHED:
if (ret == -1) {
// Error! Postcondition #1.
- perror("write");
+ log_perror("write");
close_client(client);
return;
}
// but we'll start sending immediately as we get data.
// This is postcondition #3.
client->state = Client::SENDING_DATA;
- client->bytes_sent = client->stream->bytes_received;
+ client->stream_pos = client->stream->bytes_received;
client->stream->put_client_to_sleep(client);
return;
}
// See if there's some data we've lost. Ideally, we should drop to a block boundary,
// but resync will be the mux's problem.
Stream *stream = client->stream;
- size_t bytes_to_send = stream->bytes_received - client->bytes_sent;
+ size_t bytes_to_send = stream->bytes_received - client->stream_pos;
if (bytes_to_send == 0) {
return;
}
if (bytes_to_send > stream->backlog_size) {
- fprintf(stderr, "WARNING: fd %d lost %lld bytes, maybe too slow connection\n",
- client->sock,
+ log(WARNING, "[%s] Client lost %lld bytes, maybe too slow connection",
+ client->remote_addr.c_str(),
(long long int)(bytes_to_send - stream->backlog_size));
- client->bytes_sent = stream->bytes_received - stream->backlog_size;
+ client->stream_pos = stream->bytes_received - stream->backlog_size;
+ client->bytes_lost += bytes_to_send - stream->backlog_size;
+ ++client->num_loss_events;
bytes_to_send = stream->backlog_size;
}
// See if we need to split across the circular buffer.
bool more_data = false;
- if ((client->bytes_sent % stream->backlog_size) + bytes_to_send > stream->backlog_size) {
- bytes_to_send = stream->backlog_size - (client->bytes_sent % stream->backlog_size);
+ if ((client->stream_pos % stream->backlog_size) + bytes_to_send > stream->backlog_size) {
+ bytes_to_send = stream->backlog_size - (client->stream_pos % stream->backlog_size);
more_data = true;
}
ssize_t ret;
do {
- loff_t offset = client->bytes_sent % stream->backlog_size;
+ loff_t offset = client->stream_pos % stream->backlog_size;
ret = sendfile(client->sock, stream->data_fd, &offset, bytes_to_send);
} while (ret == -1 && errno == EINTR);
}
if (ret == -1) {
// Error, close; postcondition #1.
- perror("sendfile");
+ log_perror("sendfile");
close_client(client);
return;
}
+ client->stream_pos += ret;
client->bytes_sent += ret;
- if (client->bytes_sent == stream->bytes_received) {
+ if (client->stream_pos == stream->bytes_received) {
// We don't have any more data for this client, so put it to sleep.
// This is postcondition #3.
stream->put_client_to_sleep(client);
- } else if (more_data) {
+ } else if (more_data && size_t(ret) == bytes_to_send) {
goto sending_data_again;
}
break;
}
if (setsockopt(client->sock, SOL_SOCKET, SO_MARK, &client->fwmark, sizeof(client->fwmark)) == -1) {
if (client->fwmark != 0) {
- perror("setsockopt(SO_MARK)");
+ log_perror("setsockopt(SO_MARK)");
}
}
client->request.clear();
epoll_event ev;
ev.events = EPOLLOUT | EPOLLET | EPOLLRDHUP;
- ev.data.u64 = 0; // Keep Valgrind happy.
- ev.data.fd = client->sock;
+ ev.data.u64 = reinterpret_cast<uint64_t>(client);
if (epoll_ctl(epoll_fd, EPOLL_CTL_MOD, client->sock, &ev) == -1) {
- perror("epoll_ctl(EPOLL_CTL_MOD)");
+ log_perror("epoll_ctl(EPOLL_CTL_MOD)");
exit(1);
}
}
epoll_event ev;
ev.events = EPOLLOUT | EPOLLET | EPOLLRDHUP;
- ev.data.u64 = 0; // Keep Valgrind happy.
- ev.data.fd = client->sock;
+ ev.data.u64 = reinterpret_cast<uint64_t>(client);
if (epoll_ctl(epoll_fd, EPOLL_CTL_MOD, client->sock, &ev) == -1) {
- perror("epoll_ctl(EPOLL_CTL_MOD)");
+ log_perror("epoll_ctl(EPOLL_CTL_MOD)");
exit(1);
}
}
void Server::close_client(Client *client)
{
if (epoll_ctl(epoll_fd, EPOLL_CTL_DEL, client->sock, NULL) == -1) {
- perror("epoll_ctl(EPOLL_CTL_DEL)");
+ log_perror("epoll_ctl(EPOLL_CTL_DEL)");
exit(1);
}
}
}
+ // Log to access_log.
+ access_log->write(client->get_stats());
+
// Bye-bye!
int ret;
do {
} while (ret == -1 && errno == EINTR);
if (ret == -1) {
- perror("close");
+ log_perror("close");
}
clients.erase(client->sock);
for (map<string, string>::iterator queued_it = queued_data.begin();
queued_it != queued_data.end();
++queued_it) {
- add_data(queued_it->first, queued_it->second.data(), queued_it->second.size());
+ Stream *stream = find_stream(queued_it->first);
+ stream->add_data(queued_it->second.data(), queued_it->second.size());
+ stream->wake_up_all_clients();
}
queued_data.clear();
}