void
SPDYF_session_close (struct SPDY_Session *session)
{
struct SPDY_Daemon *daemon = session->daemon;
int by_client = session->read_closed ? SPDY_YES : SPDY_NO;
//shutdown the tls and deinit the tls context
session->fio_close_session(session);
shutdown (session->socket_fd,
session->read_closed ? SHUT_WR : SHUT_RDWR);
session->read_closed = true;
//remove session from the list
DLL_remove (daemon->sessions_head,
daemon->sessions_tail,
session);
//add the session for the list for cleaning up
DLL_insert (daemon->cleanup_head,
daemon->cleanup_tail,
session);
//call callback for closed session
if(NULL != daemon->session_closed_cb)
{
daemon->session_closed_cb(daemon->cls, session, by_client);
}
}
void
spdy_free_connection(struct SPDY_Connection * connection)
{
struct Proxy *proxy;
struct Proxy *proxy_next;
if(NULL != connection)
{
for(proxy = connection->proxies_head; NULL != proxy; proxy=proxy_next)
{
proxy_next = proxy->next;
DLL_remove(connection->proxies_head, connection->proxies_tail, proxy);
proxy->spdy_active = false;
proxy->spdy_error = true;
PRINT_INFO2("spdy_free_connection for id %i", proxy->id);
if(!proxy->http_active)
{
free_proxy(proxy);
}
}
spdylay_session_del(connection->session);
SSL_free(connection->ssl);
free(connection->host);
free(connection);
//connection->session = NULL;
}
}
/*
* The implementation of spdylay_on_stream_close_callback type. We use
* this function to know the response is fully received. Since we just
* fetch 1 resource in this program, after reception of the response,
* we submit GOAWAY and close the session.
*/
static void
spdy_cb_on_stream_close(spdylay_session *session,
int32_t stream_id,
spdylay_status_code status_code,
void *user_data)
{
(void)status_code;
(void)user_data;
struct Proxy * proxy = spdylay_session_get_stream_user_data(session, stream_id);
assert(NULL != proxy);
--glob_opt.streams_opened;
--proxy->spdy_connection->streams_opened;
PRINT_INFO2("closing stream: str opened %i; remove proxy %i", glob_opt.streams_opened, proxy->id);
DLL_remove(proxy->spdy_connection->proxies_head, proxy->spdy_connection->proxies_tail, proxy);
if(proxy->http_active)
{
proxy->spdy_active = false;
}
else
{
free_proxy(proxy);
}
}
void
SPDYF_session_destroy(struct SPDY_Session *session)
{
struct SPDYF_Stream *stream;
struct SPDYF_Response_Queue *response_queue;
(void)close (session->socket_fd);
SPDYF_zlib_deflate_end(&session->zlib_send_stream);
SPDYF_zlib_inflate_end(&session->zlib_recv_stream);
//clean up unsent data in the output queue
while (NULL != (response_queue = session->response_queue_head))
{
DLL_remove (session->response_queue_head,
session->response_queue_tail,
response_queue);
if(NULL != response_queue->frqcb)
{
response_queue->frqcb(response_queue->frqcb_cls, response_queue, SPDY_RESPONSE_RESULT_SESSION_CLOSED);
}
SPDYF_response_queue_destroy(response_queue);
}
//clean up the streams belonging to this session
while (NULL != (stream = session->streams_head))
{
DLL_remove (session->streams_head,
session->streams_tail,
stream);
SPDYF_stream_destroy(stream);
}
free(session->addr);
free(session->read_buffer);
free(session->write_buffer);
free(session);
}
void
spdy_run_select(fd_set * read_fd_set,
fd_set * write_fd_set,
fd_set * except_fd_set,
struct SPDY_Connection *connections[],
int size)
{
int i;
int ret;
for(i=0; i<size; ++i)
{
// PRINT_INFO2("exec about to be called for %s", connections[i]->host);
if(FD_ISSET(connections[i]->fd, read_fd_set) || FD_ISSET(connections[i]->fd, write_fd_set) || FD_ISSET(connections[i]->fd, except_fd_set))
{
//raise(SIGINT);
ret = spdy_exec_io(connections[i]);
if(0 != ret)
{
glob_opt.streams_opened -= connections[i]->streams_opened;
if(connections[i] == glob_opt.spdy_connection)
{
glob_opt.spdy_connection = NULL;
}
else
{
DLL_remove(glob_opt.spdy_connections_head, glob_opt.spdy_connections_tail, connections[i]);
glob_opt.total_spdy_connections--;
}
PRINT_INFO("in spdy_run_select");
spdy_free_connection(connections[i]);
}
}
else
{
PRINT_INFO("not called");
//PRINT_INFO2("connection->want_io %i",connections[i]->want_io);
//PRINT_INFO2("read %i",spdylay_session_want_read(connections[i]->session));
//PRINT_INFO2("write %i",spdylay_session_want_write(connections[i]->session));
//raise(SIGINT);
}
}
}
int
SPDYF_session_write (struct SPDY_Session *session,
bool only_one_frame)
{
unsigned int i;
int bytes_written;
struct SPDYF_Response_Queue *queue_head;
struct SPDYF_Response_Queue *response_queue;
if(SPDY_SESSION_STATUS_CLOSING == session->status)
return SPDY_NO;
if(SPDY_NO == session->fio_before_write(session))
return SPDY_NO;
for(i=0;
only_one_frame
? i < 1
: i < session->max_num_frames;
++i)
{
//if the buffer is not null, part of the last frame is still
//pending to be sent
if(NULL == session->write_buffer)
{
//discard frames on closed streams
response_queue = session->response_queue_head;
while(NULL != response_queue)
{
//if stream is closed, remove not yet sent frames
//associated with it
//GOAWAY frames are not associated to streams
//and still need to be sent
if(NULL == response_queue->stream
|| !response_queue->stream->is_out_closed)
break;
DLL_remove(session->response_queue_head,session->response_queue_tail,response_queue);
if(NULL != response_queue->frqcb)
{
response_queue->frqcb(response_queue->frqcb_cls, response_queue, SPDY_RESPONSE_RESULT_STREAM_CLOSED);
}
SPDYF_response_queue_destroy(response_queue);
response_queue = session->response_queue_head;
}
if(NULL == session->response_queue_head)
break;//nothing on the queue
//get next data from queue and put it to the write buffer
// to send it
if(SPDY_NO == session->response_queue_head->process_response_handler(session))
{
//error occured and the handler changed or not the
//session's status appropriately
if(SPDY_SESSION_STATUS_CLOSING == session->status)
{
//try to send GOAWAY first if the current frame is different
if(session->response_queue_head->is_data
|| SPDY_CONTROL_FRAME_TYPES_GOAWAY
!= session->response_queue_head->control_frame->type)
{
session->status = SPDY_SESSION_STATUS_FLUSHING;
SPDYF_prepare_goaway(session, SPDY_GOAWAY_STATUS_INTERNAL_ERROR, true);
SPDYF_session_write(session,true);
session->status = SPDY_SESSION_STATUS_CLOSING;
}
return SPDY_YES;
}
//just return from the loop to return from this function
++i;
break;
}
//check if something was prepared for writing
//on respones with callbacks it is possible that their is no
//data available
if(0 == session->write_buffer_size)//nothing to write
{
if(response_queue != session->response_queue_head)
{
//the handler modified the queue
continue;
}
else
{
//no need to try the same frame again
++i;
break;
}
}
}
session->last_activity = SPDYF_monotonic_time();
//actual write to the IO
bytes_written = session->fio_send(session,
session->write_buffer + session->write_buffer_beginning,
session->write_buffer_offset - session->write_buffer_beginning);
switch(bytes_written)
{
case SPDY_IO_ERROR_CLOSED:
//The TLS connection was closed by the other party, clean
//or not
shutdown (session->socket_fd, SHUT_RD);
session->read_closed = true;
session->status = SPDY_SESSION_STATUS_CLOSING;
return SPDY_YES;
case SPDY_IO_ERROR_ERROR:
//any kind of error in the TLS subsystem
//forbid more writing
session->status = SPDY_SESSION_STATUS_CLOSING;
return SPDY_YES;
case SPDY_IO_ERROR_AGAIN:
//read or write should be called again; leave it for the
//next time; return from the function as we do not now
//whether reading or writing is needed
return i>0 ? SPDY_YES : SPDY_NO;
//default:
//something was really read from the TLS subsystem
//just continue
}
session->write_buffer_beginning += bytes_written;
//check if the full buffer was written
if(session->write_buffer_beginning == session->write_buffer_size)
{
//that response is handled, remove it from queue
free(session->write_buffer);
session->write_buffer = NULL;
session->write_buffer_size = 0;
queue_head = session->response_queue_head;
if(NULL == queue_head->next)
{
session->response_queue_head = NULL;
session->response_queue_tail = NULL;
}
else
{
session->response_queue_head = queue_head->next;
session->response_queue_head->prev = NULL;
}
//set stream to closed if the frame's fin flag is set
SPDYF_stream_set_flags_on_write(queue_head);
if(NULL != queue_head->frqcb)
{
//application layer callback to notify sending of the response
queue_head->frqcb(queue_head->frqcb_cls, queue_head, SPDY_RESPONSE_RESULT_SUCCESS);
}
SPDYF_response_queue_destroy(queue_head);
}
}
if(SPDY_SESSION_STATUS_FLUSHING == session->status
&& NULL == session->response_queue_head)
session->status = SPDY_SESSION_STATUS_CLOSING;
//return i>0 ? SPDY_YES : SPDY_NO;
return session->fio_after_write(session, i>0 ? SPDY_YES : SPDY_NO);
}
/**
* Run through the suspended connections and move any that are no
* longer suspended back to the active state.
*
* @remark To be called only from thread that process
* daemon's select()/poll()/etc.
*
* @param daemon daemon context
* @return true if a connection was actually resumed
*/
bool
MHD_resume_suspended_connections_ (struct MHD_Daemon *daemon)
/* FIXME: rename connections -> requests? */
{
struct MHD_Connection *pos;
struct MHD_Connection *prev = NULL;
bool ret;
const bool used_thr_p_c = (MHD_TM_THREAD_PER_CONNECTION == daemon->threading_mode);
mhd_assert (NULL == daemon->worker_pool);
ret = false;
MHD_mutex_lock_chk_ (&daemon->cleanup_connection_mutex);
if (daemon->resuming)
{
prev = daemon->suspended_connections_tail;
/* During shutdown check for resuming is forced. */
mhd_assert((NULL != prev) || (daemon->shutdown));
}
daemon->resuming = false;
while (NULL != (pos = prev))
{
#ifdef UPGRADE_SUPPORT
struct MHD_UpgradeResponseHandle * const urh = pos->request.urh;
#else /* ! UPGRADE_SUPPORT */
static const void * const urh = NULL;
#endif /* ! UPGRADE_SUPPORT */
prev = pos->prev;
if ( (! pos->resuming)
#ifdef UPGRADE_SUPPORT
|| ( (NULL != urh) &&
( (! urh->was_closed) ||
(! urh->clean_ready) ) )
#endif /* UPGRADE_SUPPORT */
)
continue;
ret = true;
mhd_assert (pos->suspended);
DLL_remove (daemon->suspended_connections_head,
daemon->suspended_connections_tail,
pos);
pos->suspended = false;
if (NULL == urh)
{
DLL_insert (daemon->connections_head,
daemon->connections_tail,
pos);
if (! used_thr_p_c)
{
/* Reset timeout timer on resume. */
if (0 != pos->connection_timeout)
pos->last_activity = MHD_monotonic_sec_counter();
if (pos->connection_timeout == daemon->connection_default_timeout)
XDLL_insert (daemon->normal_timeout_head,
daemon->normal_timeout_tail,
pos);
else
XDLL_insert (daemon->manual_timeout_head,
daemon->manual_timeout_tail,
pos);
}
#ifdef EPOLL_SUPPORT
if (MHD_ELS_EPOLL == daemon->event_loop_syscall)
{
if (0 != (pos->epoll_state & MHD_EPOLL_STATE_IN_EREADY_EDLL))
MHD_PANIC ("Resumed connection was already in EREADY set\n");
/* we always mark resumed connections as ready, as we
might have missed the edge poll event during suspension */
EDLL_insert (daemon->eready_head,
daemon->eready_tail,
pos);
pos->epoll_state |= MHD_EPOLL_STATE_IN_EREADY_EDLL | \
MHD_EPOLL_STATE_READ_READY | MHD_EPOLL_STATE_WRITE_READY;
pos->epoll_state &= ~MHD_EPOLL_STATE_SUSPENDED;
}
#endif
}
#ifdef UPGRADE_SUPPORT
else
{
struct MHD_Response *response = pos->request.response;
/* Data forwarding was finished (for TLS connections) AND
* application was closed upgraded connection.
* Insert connection into cleanup list. */
if ( (NULL != response) &&
(MHD_TM_THREAD_PER_CONNECTION != daemon->threading_mode) &&
(NULL != response->termination_cb) )
response->termination_cb (response->termination_cb_cls,
MHD_REQUEST_TERMINATED_COMPLETED_OK,
&pos->request.client_context);
DLL_insert (daemon->cleanup_head,
daemon->cleanup_tail,
pos);
}
#endif /* UPGRADE_SUPPORT */
pos->resuming = false;
}
MHD_mutex_unlock_chk_ (&daemon->cleanup_connection_mutex);
if ( (used_thr_p_c) &&
(ret) )
{ /* Wake up suspended connections. */
if (! MHD_itc_activate_(daemon->itc,
"w"))
{
#ifdef HAVE_MESSAGES
MHD_DLOG (daemon,
MHD_SC_ITC_USE_FAILED,
_("Failed to signal resume of connection via inter-thread communication channel."));
#endif
}
}
return ret;
}
int
spdy_get_selectfdset(fd_set * read_fd_set,
fd_set * write_fd_set,
fd_set * except_fd_set,
struct SPDY_Connection *connections[],
unsigned int max_size,
nfds_t *real_size)
{
struct SPDY_Connection *connection;
struct SPDY_Connection *next_connection;
bool ret;
int maxfd = 0;
*real_size = 0;
if(max_size<1)
return 0;
if(NULL != glob_opt.spdy_connection)
{
ret = spdy_ctl_select(read_fd_set,
write_fd_set,
except_fd_set, glob_opt.spdy_connection);
if(!ret)
{
glob_opt.streams_opened -= glob_opt.spdy_connection->streams_opened;
PRINT_INFO("spdy_free_connection in spdy_get_selectfdset");
spdy_free_connection(glob_opt.spdy_connection);
glob_opt.spdy_connection = NULL;
}
else
{
connections[*real_size] = glob_opt.spdy_connection;
++(*real_size);
if(maxfd < glob_opt.spdy_connection->fd) maxfd = glob_opt.spdy_connection->fd;
}
}
connection = glob_opt.spdy_connections_head;
while(NULL != connection && *real_size < max_size)
{
assert(!glob_opt.only_proxy);
ret = spdy_ctl_select(read_fd_set,
write_fd_set,
except_fd_set, connection);
next_connection = connection->next;
if(!ret)
{
glob_opt.streams_opened -= connection->streams_opened;
DLL_remove(glob_opt.spdy_connections_head, glob_opt.spdy_connections_tail, connection);
glob_opt.total_spdy_connections--;
PRINT_INFO("spdy_free_connection in spdy_get_selectfdset");
spdy_free_connection(connection);
}
else
{
connections[*real_size] = connection;
++(*real_size);
if(maxfd < connection->fd) maxfd = connection->fd;
}
connection = next_connection;
}
//, "TODO max num of conn reached; close something"
assert(NULL == connection);
return maxfd;
}