223 lines
6.1 KiB
C
223 lines
6.1 KiB
C
/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010-2018 Andy Green <andy@warmcat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation:
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* version 2.1 of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#include <core/private.h>
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static int
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rops_handle_POLLIN_raw_skt(struct lws_context_per_thread *pt, struct lws *wsi,
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struct lws_pollfd *pollfd)
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{
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struct lws_tokens ebuf;
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int n, buffered;
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/* pending truncated sends have uber priority */
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if (wsi->trunc_len) {
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if (!(pollfd->revents & LWS_POLLOUT))
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return LWS_HPI_RET_HANDLED;
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if (lws_issue_raw(wsi, wsi->trunc_alloc + wsi->trunc_offset,
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wsi->trunc_len) < 0)
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goto fail;
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/*
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* we can't afford to allow input processing to send
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* something new, so spin around he event loop until
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* he doesn't have any partials
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*/
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return LWS_HPI_RET_HANDLED;
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}
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if ((pollfd->revents & pollfd->events & LWS_POLLIN) &&
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/* any tunnel has to have been established... */
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lwsi_state(wsi) != LRS_SSL_ACK_PENDING &&
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!(wsi->favoured_pollin &&
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(pollfd->revents & pollfd->events & LWS_POLLOUT))) {
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buffered = lws_buflist_aware_read(pt, wsi, &ebuf);
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switch (ebuf.len) {
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case 0:
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lwsl_info("%s: read 0 len\n", __func__);
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wsi->seen_zero_length_recv = 1;
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lws_change_pollfd(wsi, LWS_POLLIN, 0);
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/*
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* we need to go to fail here, since it's the only
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* chance we get to understand that the socket has
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* closed
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*/
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// goto try_pollout;
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goto fail;
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case LWS_SSL_CAPABLE_ERROR:
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goto fail;
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case LWS_SSL_CAPABLE_MORE_SERVICE:
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goto try_pollout;
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}
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n = user_callback_handle_rxflow(wsi->protocol->callback,
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wsi, LWS_CALLBACK_RAW_RX,
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wsi->user_space, ebuf.token,
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ebuf.len);
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if (n < 0) {
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lwsl_info("LWS_CALLBACK_RAW_RX_fail\n");
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goto fail;
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}
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if (lws_buflist_aware_consume(wsi, &ebuf, ebuf.len, buffered))
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return LWS_HPI_RET_PLEASE_CLOSE_ME;
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} else
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if (wsi->favoured_pollin &&
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(pollfd->revents & pollfd->events & LWS_POLLOUT))
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/* we balanced the last favouring of pollin */
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wsi->favoured_pollin = 0;
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try_pollout:
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/* this handles POLLOUT for http serving fragments */
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if (!(pollfd->revents & LWS_POLLOUT))
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return LWS_HPI_RET_HANDLED;
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/* one shot */
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if (lws_change_pollfd(wsi, LWS_POLLOUT, 0)) {
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lwsl_notice("%s a\n", __func__);
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goto fail;
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}
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/* clear back-to-back write detection */
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wsi->could_have_pending = 0;
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lws_stats_atomic_bump(wsi->context, pt,
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LWSSTATS_C_WRITEABLE_CB, 1);
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#if defined(LWS_WITH_STATS)
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if (wsi->active_writable_req_us) {
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uint64_t ul = time_in_microseconds() -
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wsi->active_writable_req_us;
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lws_stats_atomic_bump(wsi->context, pt,
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LWSSTATS_MS_WRITABLE_DELAY, ul);
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lws_stats_atomic_max(wsi->context, pt,
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LWSSTATS_MS_WORST_WRITABLE_DELAY, ul);
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wsi->active_writable_req_us = 0;
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}
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#endif
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n = user_callback_handle_rxflow(wsi->protocol->callback,
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wsi, LWS_CALLBACK_RAW_WRITEABLE,
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wsi->user_space, NULL, 0);
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if (n < 0) {
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lwsl_info("writeable_fail\n");
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goto fail;
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}
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return LWS_HPI_RET_HANDLED;
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fail:
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lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS, "raw svc fail");
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return LWS_HPI_RET_WSI_ALREADY_DIED;
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}
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static int
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rops_handle_POLLIN_raw_file(struct lws_context_per_thread *pt, struct lws *wsi,
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struct lws_pollfd *pollfd)
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{
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int n;
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if (pollfd->revents & LWS_POLLOUT) {
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n = lws_callback_as_writeable(wsi);
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if (lws_change_pollfd(wsi, LWS_POLLOUT, 0)) {
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lwsl_info("failed at set pollfd\n");
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return LWS_HPI_RET_WSI_ALREADY_DIED;
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}
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if (n)
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return LWS_HPI_RET_PLEASE_CLOSE_ME;
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}
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if (pollfd->revents & LWS_POLLIN) {
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if (user_callback_handle_rxflow(wsi->protocol->callback,
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wsi, LWS_CALLBACK_RAW_RX_FILE,
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wsi->user_space, NULL, 0)) {
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lwsl_debug("raw rx callback closed it\n");
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return LWS_HPI_RET_PLEASE_CLOSE_ME;
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}
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}
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if (pollfd->revents & LWS_POLLHUP)
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return LWS_HPI_RET_PLEASE_CLOSE_ME;
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return LWS_HPI_RET_HANDLED;
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}
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struct lws_role_ops role_ops_raw_skt = {
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/* role name */ "raw-skt",
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/* alpn id */ NULL,
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/* check_upgrades */ NULL,
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/* init_context */ NULL,
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/* init_vhost */ NULL,
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/* destroy_vhost */ NULL,
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/* periodic_checks */ NULL,
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/* service_flag_pending */ NULL,
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/* handle_POLLIN */ rops_handle_POLLIN_raw_skt,
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/* handle_POLLOUT */ NULL,
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/* perform_user_POLLOUT */ NULL,
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/* callback_on_writable */ NULL,
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/* tx_credit */ NULL,
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/* write_role_protocol */ NULL,
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/* encapsulation_parent */ NULL,
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/* alpn_negotiated */ NULL,
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/* close_via_role_protocol */ NULL,
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/* close_role */ NULL,
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/* close_kill_connection */ NULL,
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/* destroy_role */ NULL,
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/* writeable cb clnt, srv */ { LWS_CALLBACK_RAW_WRITEABLE, 0 },
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/* close cb clnt, srv */ { LWS_CALLBACK_RAW_CLOSE, 0 },
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/* file_handle */ 0,
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};
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struct lws_role_ops role_ops_raw_file = {
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/* role name */ "raw-file",
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/* alpn id */ NULL,
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/* check_upgrades */ NULL,
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/* init_context */ NULL,
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/* init_vhost */ NULL,
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/* destroy_vhost */ NULL,
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/* periodic_checks */ NULL,
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/* service_flag_pending */ NULL,
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/* handle_POLLIN */ rops_handle_POLLIN_raw_file,
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/* handle_POLLOUT */ NULL,
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/* perform_user_POLLOUT */ NULL,
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/* callback_on_writable */ NULL,
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/* tx_credit */ NULL,
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/* write_role_protocol */ NULL,
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/* encapsulation_parent */ NULL,
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/* alpn_negotiated */ NULL,
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/* close_via_role_protocol */ NULL,
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/* close_role */ NULL,
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/* close_kill_connection */ NULL,
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/* destroy_role */ NULL,
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/* writeable cb clnt, srv */ { LWS_CALLBACK_RAW_WRITEABLE_FILE, 0 },
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/* close cb clnt, srv */ { LWS_CALLBACK_RAW_CLOSE_FILE, 0 },
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/* file_handle */ 1,
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};
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