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/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <private-lib-core.h>
static int
rops_handle_POLLIN_pipe(struct lws_context_per_thread *pt, struct lws *wsi,
struct lws_pollfd *pollfd)
{
#if defined(LWS_HAVE_EVENTFD)
eventfd_t value;
int n;
n = eventfd_read(wsi->desc.sockfd, &value);
if (n < 0) {
lwsl_notice("%s: eventfd read %d bailed errno %d\n", __func__,
wsi->desc.sockfd, LWS_ERRNO);
return LWS_HPI_RET_PLEASE_CLOSE_ME;
}
#elif !defined(WIN32) && !defined(_WIN32)
char s[100];
int n;
/*
* discard the byte(s) that signaled us
* We really don't care about the number of bytes, but coverity
* thinks we should.
*/
n = (int)read(wsi->desc.sockfd, s, sizeof(s));
(void)n;
if (n < 0)
return LWS_HPI_RET_PLEASE_CLOSE_ME;
#elif defined(WIN32)
char s[100];
int n;
n = recv(wsi->desc.sockfd, s, sizeof(s), 0);
if (n == SOCKET_ERROR)
return LWS_HPI_RET_PLEASE_CLOSE_ME;
#endif
#if defined(LWS_WITH_THREADPOOL) && defined(LWS_HAVE_PTHREAD_H)
/*
* threadpools that need to call for on_writable callbacks do it by
* marking the task as needing one for its wsi, then cancelling service.
*
* Each tsi will call this to perform the actual callback_on_writable
* from the correct service thread context
*/
lws_threadpool_tsi_context(pt->context, pt->tid);
#endif
#if LWS_MAX_SMP > 1
/*
* Other pts need to take care of their own wsi bound to a vhost that
* is going down
*/
if (pt->context->owner_vh_being_destroyed.head) {
lws_start_foreach_dll_safe(struct lws_dll2 *, d, d1,
pt->context->owner_vh_being_destroyed.head) {
struct lws_vhost *v =
lws_container_of(d, struct lws_vhost,
vh_being_destroyed_list);
lws_vhost_lock(v); /* -------------- vh { */
__lws_vhost_destroy_pt_wsi_dieback_start(v);
lws_vhost_unlock(v); /* } vh -------------- */
} lws_end_foreach_dll_safe(d, d1);
}
#endif
#if defined(LWS_WITH_SECURE_STREAMS)
lws_dll2_foreach_safe(&pt->ss_owner, NULL, lws_ss_cancel_notify_dll);
#if defined(LWS_WITH_SECURE_STREAMS_PROXY_API) && defined(LWS_WITH_CLIENT)
lws_dll2_foreach_safe(&pt->ss_client_owner, NULL, lws_sspc_cancel_notify_dll);
#endif
#endif
/*
* the poll() wait, or the event loop for libuv etc is a
* process-wide resource that we interrupted. So let every
* protocol that may be interested in the pipe event know that
* it happened.
*/
if (lws_broadcast(pt, LWS_CALLBACK_EVENT_WAIT_CANCELLED, NULL, 0)) {
lwsl_info("closed in event cancel\n");
return LWS_HPI_RET_PLEASE_CLOSE_ME;
}
return LWS_HPI_RET_HANDLED;
}
static const lws_rops_t rops_table_pipe[] = {
/* 1 */ { .handle_POLLIN = rops_handle_POLLIN_pipe },
};
const struct lws_role_ops role_ops_pipe = {
/* role name */ "pipe",
/* alpn id */ NULL,
/* rops_table */ rops_table_pipe,
/* rops_idx */ {
/* LWS_ROPS_check_upgrades */
/* LWS_ROPS_pt_init_destroy */ 0x00,
/* LWS_ROPS_init_vhost */
/* LWS_ROPS_destroy_vhost */ 0x00,
/* LWS_ROPS_service_flag_pending */
/* LWS_ROPS_handle_POLLIN */ 0x01,
/* LWS_ROPS_handle_POLLOUT */
/* LWS_ROPS_perform_user_POLLOUT */ 0x00,
/* LWS_ROPS_callback_on_writable */
/* LWS_ROPS_tx_credit */ 0x00,
/* LWS_ROPS_write_role_protocol */
/* LWS_ROPS_encapsulation_parent */ 0x00,
/* LWS_ROPS_alpn_negotiated */
/* LWS_ROPS_close_via_role_protocol */ 0x00,
/* LWS_ROPS_close_role */
/* LWS_ROPS_close_kill_connection */ 0x00,
/* LWS_ROPS_destroy_role */
/* LWS_ROPS_adoption_bind */ 0x00,
/* LWS_ROPS_client_bind */
/* LWS_ROPS_issue_keepalive */ 0x00,
},
/* adoption_cb clnt, srv */ { 0, 0 },
/* rx_cb clnt, srv */ { 0, 0 },
/* writeable cb clnt, srv */ { 0, 0 },
/* close cb clnt, srv */ { 0, 0 },
/* protocol_bind_cb c,s */ { 0, 0 },
/* protocol_unbind_cb c,s */ { 0, 0 },
#if defined(WIN32)
/* file_handle (no, UDP) */ 0,
#else
/* file_handle */ 1,
#endif
};
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