mirror of
https://github.com/warmcat/libwebsockets.git
synced 2025-03-16 00:00:07 +01:00
6710279e21
With http, the protocol doesn't indicate where the headers end and the next transaction or body begin. Until now, we handled that for client header response parsing by reading from the tls buffer bytewise. This modernizes the code to read in up to 256-byte chunks and parse the chunks in one hit (the parse API is already set up for doing this elsewhere). Now we have a generic input buflist, adapt the parser loop to go through that and arrange that any leftovers are placed on there.
262 lines
7.3 KiB
C
262 lines
7.3 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 - 2019 Andy Green <andy@warmcat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <private-lib-core.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 (lws_has_buffered_out(wsi)) {
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if (!(pollfd->revents & LWS_POLLOUT))
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return LWS_HPI_RET_HANDLED;
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/* drain the output buflist */
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if (lws_issue_raw(wsi, NULL, 0) < 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 defined(LWS_WITH_SERVER)
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if (!lwsi_role_client(wsi) && lwsi_state(wsi) != LRS_ESTABLISHED) {
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lwsl_debug("%s: %p: wsistate 0x%x\n", __func__, wsi,
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wsi->wsistate);
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if (lwsi_state(wsi) != LRS_SSL_INIT)
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if (lws_server_socket_service_ssl(wsi,
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LWS_SOCK_INVALID))
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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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#endif
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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, __func__);
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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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if (lws_change_pollfd(wsi, LWS_POLLIN, 0))
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goto fail;
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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_finished_consuming(wsi, &ebuf, ebuf.len,
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buffered, __func__))
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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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if (!(pollfd->revents & LWS_POLLOUT))
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return LWS_HPI_RET_HANDLED;
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#if defined(LWS_WITH_CLIENT)
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if (lwsi_state(wsi) == LRS_WAITING_CONNECT)
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lws_client_connect_4_established(wsi, NULL, 0);
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#endif
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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_bump(pt, 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 = lws_now_usecs() -
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wsi->active_writable_req_us;
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lws_stats_bump(pt, LWSSTATS_US_WRITABLE_DELAY_AVG, ul);
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lws_stats_max(pt,
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LWSSTATS_US_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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#if defined(LWS_WITH_SERVER)
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static int
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rops_adoption_bind_raw_skt(struct lws *wsi, int type, const char *vh_prot_name)
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{
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/* no http but socket... must be raw skt */
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if ((type & LWS_ADOPT_HTTP) || !(type & LWS_ADOPT_SOCKET) ||
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(type & _LWS_ADOPT_FINISH))
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return 0; /* no match */
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#if !defined(LWS_PLAT_FREERTOS) && !defined(LWS_PLAT_OPTEE)
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if (type & LWS_ADOPT_FLAG_UDP)
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/*
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* these can be >128 bytes, so just alloc for UDP
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*/
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wsi->udp = lws_malloc(sizeof(*wsi->udp), "udp struct");
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#endif
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lws_role_transition(wsi, 0, (type & LWS_ADOPT_ALLOW_SSL) ? LRS_SSL_INIT :
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LRS_ESTABLISHED, &role_ops_raw_skt);
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if (vh_prot_name)
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lws_bind_protocol(wsi, wsi->protocol, __func__);
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else
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/* this is the only time he will transition */
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lws_bind_protocol(wsi,
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&wsi->vhost->protocols[wsi->vhost->raw_protocol_index],
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__func__);
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return 1; /* bound */
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}
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#endif
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#if defined(LWS_WITH_CLIENT)
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static int
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rops_client_bind_raw_skt(struct lws *wsi,
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const struct lws_client_connect_info *i)
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{
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if (!i) {
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/* finalize */
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if (!wsi->user_space && wsi->stash->cis[CIS_METHOD])
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if (lws_ensure_user_space(wsi))
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return 1;
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return 0;
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}
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/* we are a fallback if nothing else matched */
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if (!i->local_protocol_name || strcmp(i->local_protocol_name, "raw-proxy"))
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lws_role_transition(wsi, LWSIFR_CLIENT, LRS_UNCONNECTED,
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&role_ops_raw_skt);
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return 1; /* matched */
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}
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#endif
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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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#if defined(LWS_WITH_SERVER)
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/* adoption_bind */ rops_adoption_bind_raw_skt,
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#else
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NULL,
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#endif
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#if defined(LWS_WITH_CLIENT)
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/* client_bind */ rops_client_bind_raw_skt,
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#else
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NULL,
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#endif
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/* adoption_cb clnt, srv */ { LWS_CALLBACK_RAW_CONNECTED,
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LWS_CALLBACK_RAW_ADOPT },
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/* rx_cb clnt, srv */ { LWS_CALLBACK_RAW_RX,
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LWS_CALLBACK_RAW_RX },
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/* writeable cb clnt, srv */ { LWS_CALLBACK_RAW_WRITEABLE,
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LWS_CALLBACK_RAW_WRITEABLE},
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/* close cb clnt, srv */ { LWS_CALLBACK_RAW_CLOSE,
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LWS_CALLBACK_RAW_CLOSE },
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/* protocol_bind cb c, srv */ { LWS_CALLBACK_RAW_SKT_BIND_PROTOCOL,
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LWS_CALLBACK_RAW_SKT_BIND_PROTOCOL },
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/* protocol_unbind cb c, srv */ { LWS_CALLBACK_RAW_SKT_DROP_PROTOCOL,
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LWS_CALLBACK_RAW_SKT_DROP_PROTOCOL },
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/* file_handle */ 0,
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};
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