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android / platform / external / libwebsockets / 33a60348 / . / lib / core / context.c
blob: ba133eb0098445946ee38afab77b83a3511b9a97 [file] [log] [blame]
/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2010-2018 Andy Green <andy@warmcat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation:
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include "core/private.h"
#ifndef LWS_BUILD_HASH
#define LWS_BUILD_HASH "unknown-build-hash"
#endif
const struct lws_role_ops *available_roles[] = {
#if defined(LWS_ROLE_H2)
&role_ops_h2,
#endif
#if defined(LWS_ROLE_H1)
&role_ops_h1,
#endif
#if defined(LWS_ROLE_WS)
&role_ops_ws,
#endif
#if defined(LWS_ROLE_DBUS)
&role_ops_dbus,
#endif
NULL
};
const struct lws_event_loop_ops *available_event_libs[] = {
#if defined(LWS_WITH_POLL)
&event_loop_ops_poll,
#endif
#if defined(LWS_WITH_LIBUV)
&event_loop_ops_uv,
#endif
#if defined(LWS_WITH_LIBEVENT)
&event_loop_ops_event,
#endif
#if defined(LWS_WITH_LIBEV)
&event_loop_ops_ev,
#endif
NULL
};
static const char *library_version = LWS_LIBRARY_VERSION " " LWS_BUILD_HASH;
/**
* lws_get_library_version: get version and git hash library built from
*
* returns a const char * to a string like "1.1 178d78c"
* representing the library version followed by the git head hash it
* was built from
*/
LWS_VISIBLE const char *
lws_get_library_version(void)
{
return library_version;
}
int
lws_role_call_alpn_negotiated(struct lws *wsi, const char *alpn)
{
#if defined(LWS_WITH_TLS)
if (!alpn)
return 0;
lwsl_info("%s: '%s'\n", __func__, alpn);
LWS_FOR_EVERY_AVAILABLE_ROLE_START(ar)
if (ar->alpn && !strcmp(ar->alpn, alpn) && ar->alpn_negotiated)
return ar->alpn_negotiated(wsi, alpn);
LWS_FOR_EVERY_AVAILABLE_ROLE_END;
#endif
return 0;
}
#if !defined(LWS_WITHOUT_SERVER)
int
lws_role_call_adoption_bind(struct lws *wsi, int type, const char *prot)
{
LWS_FOR_EVERY_AVAILABLE_ROLE_START(ar)
if (ar->adoption_bind)
if (ar->adoption_bind(wsi, type, prot))
return 0;
LWS_FOR_EVERY_AVAILABLE_ROLE_END;
/* fall back to raw socket role if, eg, h1 not configured */
if (role_ops_raw_skt.adoption_bind &&
role_ops_raw_skt.adoption_bind(wsi, type, prot))
return 0;
/* fall back to raw file role if, eg, h1 not configured */
if (role_ops_raw_file.adoption_bind &&
role_ops_raw_file.adoption_bind(wsi, type, prot))
return 0;
return 1;
}
#endif
#if !defined(LWS_WITHOUT_CLIENT)
int
lws_role_call_client_bind(struct lws *wsi,
const struct lws_client_connect_info *i)
{
LWS_FOR_EVERY_AVAILABLE_ROLE_START(ar)
if (ar->client_bind) {
int m = ar->client_bind(wsi, i);
if (m < 0)
return m;
if (m)
return 0;
}
LWS_FOR_EVERY_AVAILABLE_ROLE_END;
/* fall back to raw socket role if, eg, h1 not configured */
if (role_ops_raw_skt.client_bind &&
role_ops_raw_skt.client_bind(wsi, i))
return 0;
return 1;
}
#endif
static const char * const mount_protocols[] = {
"http://",
"https://",
"file://",
"cgi://",
">http://",
">https://",
"callback://"
};
LWS_VISIBLE void *
lws_protocol_vh_priv_zalloc(struct lws_vhost *vhost,
const struct lws_protocols *prot, int size)
{
int n = 0;
/* allocate the vh priv array only on demand */
if (!vhost->protocol_vh_privs) {
vhost->protocol_vh_privs = (void **)lws_zalloc(
vhost->count_protocols * sizeof(void *),
"protocol_vh_privs");
if (!vhost->protocol_vh_privs)
return NULL;
}
while (n < vhost->count_protocols && &vhost->protocols[n] != prot)
n++;
if (n == vhost->count_protocols) {
n = 0;
while (n < vhost->count_protocols &&
strcmp(vhost->protocols[n].name, prot->name))
n++;
if (n == vhost->count_protocols)
return NULL;
}
vhost->protocol_vh_privs[n] = lws_zalloc(size, "vh priv");
return vhost->protocol_vh_privs[n];
}
LWS_VISIBLE void *
lws_protocol_vh_priv_get(struct lws_vhost *vhost,
const struct lws_protocols *prot)
{
int n = 0;
if (!vhost || !vhost->protocol_vh_privs || !prot)
return NULL;
while (n < vhost->count_protocols && &vhost->protocols[n] != prot)
n++;
if (n == vhost->count_protocols) {
n = 0;
while (n < vhost->count_protocols &&
strcmp(vhost->protocols[n].name, prot->name))
n++;
if (n == vhost->count_protocols) {
lwsl_err("%s: unknown protocol %p\n", __func__, prot);
return NULL;
}
}
return vhost->protocol_vh_privs[n];
}
static const struct lws_protocol_vhost_options *
lws_vhost_protocol_options(struct lws_vhost *vh, const char *name)
{
const struct lws_protocol_vhost_options *pvo = vh->pvo;
if (!name)
return NULL;
while (pvo) {
if (!strcmp(pvo->name, name))
return pvo;
pvo = pvo->next;
}
return NULL;
}
/*
* inform every vhost that hasn't already done it, that
* his protocols are initializing
*/
LWS_VISIBLE int
lws_protocol_init(struct lws_context *context)
{
struct lws_vhost *vh = context->vhost_list;
const struct lws_protocol_vhost_options *pvo, *pvo1;
struct lws wsi;
int n, any = 0;
if (context->doing_protocol_init)
return 0;
context->doing_protocol_init = 1;
memset(&wsi, 0, sizeof(wsi));
wsi.context = context;
lwsl_info("%s\n", __func__);
while (vh) {
wsi.vhost = vh;
/* only do the protocol init once for a given vhost */
if (vh->created_vhost_protocols ||
(vh->options & LWS_SERVER_OPTION_SKIP_PROTOCOL_INIT))
goto next;
/* initialize supported protocols on this vhost */
for (n = 0; n < vh->count_protocols; n++) {
wsi.protocol = &vh->protocols[n];
if (!vh->protocols[n].name)
continue;
pvo = lws_vhost_protocol_options(vh,
vh->protocols[n].name);
if (pvo) {
/*
* linked list of options specific to
* vh + protocol
*/
pvo1 = pvo;
pvo = pvo1->options;
while (pvo) {
lwsl_debug(
" vhost \"%s\", "
"protocol \"%s\", "
"option \"%s\"\n",
vh->name,
vh->protocols[n].name,
pvo->name);
if (!strcmp(pvo->name, "default")) {
lwsl_info("Setting default "
"protocol for vh %s to %s\n",
vh->name,
vh->protocols[n].name);
vh->default_protocol_index = n;
}
if (!strcmp(pvo->name, "raw")) {
lwsl_info("Setting raw "
"protocol for vh %s to %s\n",
vh->name,
vh->protocols[n].name);
vh->raw_protocol_index = n;
}
pvo = pvo->next;
}
pvo = pvo1->options;
}
#if defined(LWS_WITH_TLS)
any |= !!vh->tls.ssl_ctx;
#endif
/*
* inform all the protocols that they are doing their
* one-time initialization if they want to.
*
* NOTE the wsi is all zeros except for the context, vh
* + protocol ptrs so lws_get_context(wsi) etc can work
*/
if (vh->protocols[n].callback(&wsi,
LWS_CALLBACK_PROTOCOL_INIT, NULL,
(void *)pvo, 0)) {
lws_free(vh->protocol_vh_privs[n]);
vh->protocol_vh_privs[n] = NULL;
lwsl_err("%s: protocol %s failed init\n", __func__,
vh->protocols[n].name);
return 1;
}
}
vh->created_vhost_protocols = 1;
next:
vh = vh->vhost_next;
}
context->doing_protocol_init = 0;
if (!context->protocol_init_done)
lws_finalize_startup(context);
context->protocol_init_done = 1;
if (any)
lws_tls_check_all_cert_lifetimes(context);
return 0;
}
/* list of supported protocols and callbacks */
static const struct lws_protocols protocols_dummy[] = {
/* first protocol must always be HTTP handler */
{
"http-only", /* name */
lws_callback_http_dummy, /* callback */
0, /* per_session_data_size */
0, /* rx_buffer_size */
0, /* id */
NULL, /* user */
0 /* tx_packet_size */
},
/*
* the other protocols are provided by lws plugins
*/
{ NULL, NULL, 0, 0, 0, NULL, 0} /* terminator */
};
#ifdef LWS_PLAT_OPTEE
#undef LWS_HAVE_GETENV
#endif
LWS_VISIBLE struct lws_vhost *
lws_create_vhost(struct lws_context *context,
const struct lws_context_creation_info *info)
{
struct lws_vhost *vh = lws_zalloc(sizeof(*vh), "create vhost"),
**vh1 = &context->vhost_list;
const struct lws_http_mount *mounts;
const struct lws_protocols *pcols = info->protocols;
const struct lws_protocol_vhost_options *pvo;
#ifdef LWS_WITH_PLUGINS
struct lws_plugin *plugin = context->plugin_list;
#endif
struct lws_protocols *lwsp;
int m, f = !info->pvo;
char buf[20];
#if !defined(LWS_WITHOUT_CLIENT) && defined(LWS_HAVE_GETENV)
char *p;
#endif
int n;
if (!vh)
return NULL;
#if LWS_MAX_SMP > 1
pthread_mutex_init(&vh->lock, NULL);
#endif
if (!pcols)
pcols = &protocols_dummy[0];
vh->context = context;
if (!info->vhost_name)
vh->name = "default";
else
vh->name = info->vhost_name;
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
vh->http.error_document_404 = info->error_document_404;
#endif
if (info->options & LWS_SERVER_OPTION_ONLY_RAW)
lwsl_info("%s set to only support RAW\n", vh->name);
vh->iface = info->iface;
#if !defined(LWS_WITH_ESP32) && \
!defined(OPTEE_TA) && !defined(WIN32)
vh->bind_iface = info->bind_iface;
#endif
for (vh->count_protocols = 0;
pcols[vh->count_protocols].callback;
vh->count_protocols++)
;
vh->options = info->options;
vh->pvo = info->pvo;
vh->headers = info->headers;
vh->user = info->user;
vh->finalize = info->finalize;
vh->finalize_arg = info->finalize_arg;
LWS_FOR_EVERY_AVAILABLE_ROLE_START(ar)
if (ar->init_vhost)
if (ar->init_vhost(vh, info))
return NULL;
LWS_FOR_EVERY_AVAILABLE_ROLE_END;
if (info->keepalive_timeout)
vh->keepalive_timeout = info->keepalive_timeout;
else
vh->keepalive_timeout = 5;
if (info->timeout_secs_ah_idle)
vh->timeout_secs_ah_idle = info->timeout_secs_ah_idle;
else
vh->timeout_secs_ah_idle = 10;
#if defined(LWS_WITH_TLS)
vh->tls.alpn = info->alpn;
vh->tls.ssl_info_event_mask = info->ssl_info_event_mask;
if (info->ecdh_curve)
lws_strncpy(vh->tls.ecdh_curve, info->ecdh_curve,
sizeof(vh->tls.ecdh_curve));
/* carefully allocate and take a copy of cert + key paths if present */
n = 0;
if (info->ssl_cert_filepath)
n += (int)strlen(info->ssl_cert_filepath) + 1;
if (info->ssl_private_key_filepath)
n += (int)strlen(info->ssl_private_key_filepath) + 1;
if (n) {
vh->tls.key_path = vh->tls.alloc_cert_path = lws_malloc(n, "vh paths");
if (info->ssl_cert_filepath) {
n = (int)strlen(info->ssl_cert_filepath) + 1;
memcpy(vh->tls.alloc_cert_path, info->ssl_cert_filepath, n);
vh->tls.key_path += n;
}
if (info->ssl_private_key_filepath)
memcpy(vh->tls.key_path, info->ssl_private_key_filepath,
strlen(info->ssl_private_key_filepath) + 1);
}
#endif
/*
* give the vhost a unified list of protocols including the
* ones that came from plugins
*/
lwsp = lws_zalloc(sizeof(struct lws_protocols) * (vh->count_protocols +
context->plugin_protocol_count + 1),
"vhost-specific plugin table");
if (!lwsp) {
lwsl_err("OOM\n");
return NULL;
}
m = vh->count_protocols;
memcpy(lwsp, pcols, sizeof(struct lws_protocols) * m);
/* for compatibility, all protocols enabled on vhost if only
* the default vhost exists. Otherwise only vhosts who ask
* for a protocol get it enabled.
*/
if (context->options & LWS_SERVER_OPTION_EXPLICIT_VHOSTS)
f = 0;
(void)f;
#ifdef LWS_WITH_PLUGINS
if (plugin) {
while (plugin) {
for (n = 0; n < plugin->caps.count_protocols; n++) {
/*
* for compatibility's sake, no pvo implies
* allow all protocols
*/
if (f || lws_vhost_protocol_options(vh,
plugin->caps.protocols[n].name)) {
memcpy(&lwsp[m],
&plugin->caps.protocols[n],
sizeof(struct lws_protocols));
m++;
vh->count_protocols++;
}
}
plugin = plugin->list;
}
}
#endif
if (
#ifdef LWS_WITH_PLUGINS
(context->plugin_list) ||
#endif
context->options & LWS_SERVER_OPTION_EXPLICIT_VHOSTS)
vh->protocols = lwsp;
else {
vh->protocols = pcols;
lws_free(lwsp);
}
vh->same_vh_protocol_heads = (struct lws_dll_lws *)
lws_zalloc(sizeof(struct lws_dll_lws) *
vh->count_protocols, "same vh list");
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
vh->http.mount_list = info->mounts;
#endif
#ifdef LWS_WITH_UNIX_SOCK
if (LWS_UNIX_SOCK_ENABLED(vh)) {
lwsl_notice("Creating Vhost '%s' path \"%s\", %d protocols\n",
vh->name, vh->iface, vh->count_protocols);
} else
#endif
{
switch(info->port) {
case CONTEXT_PORT_NO_LISTEN:
strcpy(buf, "(serving disabled)");
break;
case CONTEXT_PORT_NO_LISTEN_SERVER:
strcpy(buf, "(no listener)");
break;
default:
lws_snprintf(buf, sizeof(buf), "port %u", info->port);
break;
}
lwsl_notice("Creating Vhost '%s' %s, %d protocols, IPv6 %s\n",
vh->name, buf, vh->count_protocols,
LWS_IPV6_ENABLED(vh) ? "on" : "off");
}
mounts = info->mounts;
while (mounts) {
(void)mount_protocols[0];
lwsl_info(" mounting %s%s to %s\n",
mount_protocols[mounts->origin_protocol],
mounts->origin, mounts->mountpoint);
/* convert interpreter protocol names to pointers */
pvo = mounts->interpret;
while (pvo) {
for (n = 0; n < vh->count_protocols; n++) {
if (strcmp(pvo->value, vh->protocols[n].name))
continue;
((struct lws_protocol_vhost_options *)pvo)->
value = (const char *)(lws_intptr_t)n;
break;
}
if (n == vh->count_protocols)
lwsl_err("ignoring unknown interp pr %s\n",
pvo->value);
pvo = pvo->next;
}
mounts = mounts->mount_next;
}
vh->listen_port = info->port;
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
vh->http.http_proxy_port = 0;
vh->http.http_proxy_address[0] = '\0';
#endif
#if defined(LWS_WITH_SOCKS5)
vh->socks_proxy_port = 0;
vh->socks_proxy_address[0] = '\0';
#endif
#if !defined(LWS_WITHOUT_CLIENT)
/* either use proxy from info, or try get it from env var */
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
/* http proxy */
if (info->http_proxy_address) {
/* override for backwards compatibility */
if (info->http_proxy_port)
vh->http.http_proxy_port = info->http_proxy_port;
lws_set_proxy(vh, info->http_proxy_address);
} else
#endif
{
#ifdef LWS_HAVE_GETENV
p = getenv("http_proxy");
if (p)
lws_set_proxy(vh, p);
#endif
}
#endif
#if defined(LWS_WITH_SOCKS5)
/* socks proxy */
if (info->socks_proxy_address) {
/* override for backwards compatibility */
if (info->socks_proxy_port)
vh->socks_proxy_port = info->socks_proxy_port;
lws_set_socks(vh, info->socks_proxy_address);
} else {
#ifdef LWS_HAVE_GETENV
p = getenv("socks_proxy");
if (p)
lws_set_socks(vh, p);
#endif
}
#endif
vh->ka_time = info->ka_time;
vh->ka_interval = info->ka_interval;
vh->ka_probes = info->ka_probes;
if (vh->options & LWS_SERVER_OPTION_STS)
lwsl_notice(" STS enabled\n");
#ifdef LWS_WITH_ACCESS_LOG
if (info->log_filepath) {
vh->log_fd = lws_open(info->log_filepath,
O_CREAT | O_APPEND | O_RDWR, 0600);
if (vh->log_fd == (int)LWS_INVALID_FILE) {
lwsl_err("unable to open log filepath %s\n",
info->log_filepath);
goto bail;
}
#ifndef WIN32
if (context->uid != -1)
if (chown(info->log_filepath, context->uid,
context->gid) == -1)
lwsl_err("unable to chown log file %s\n",
info->log_filepath);
#endif
} else
vh->log_fd = (int)LWS_INVALID_FILE;
#endif
if (lws_context_init_server_ssl(info, vh)) {
lwsl_err("%s: lws_context_init_server_ssl failed\n", __func__);
goto bail1;
}
if (lws_context_init_client_ssl(info, vh)) {
lwsl_err("%s: lws_context_init_client_ssl failed\n", __func__);
goto bail1;
}
lws_context_lock(context, "create_vhost");
n = _lws_vhost_init_server(info, vh);
lws_context_unlock(context);
if (n < 0) {
lwsl_err("init server failed\n");
goto bail1;
}
while (1) {
if (!(*vh1)) {
*vh1 = vh;
break;
}
vh1 = &(*vh1)->vhost_next;
};
/* for the case we are adding a vhost much later, after server init */
if (context->protocol_init_done)
if (lws_protocol_init(context)) {
lwsl_err("%s: lws_protocol_init failed\n", __func__);
goto bail1;
}
return vh;
bail1:
lws_vhost_destroy(vh);
return NULL;
#ifdef LWS_WITH_ACCESS_LOG
bail:
lws_free(vh);
#endif
return NULL;
}
LWS_VISIBLE int
lws_init_vhost_client_ssl(const struct lws_context_creation_info *info,
struct lws_vhost *vhost)
{
struct lws_context_creation_info i;
memcpy(&i, info, sizeof(i));
i.port = CONTEXT_PORT_NO_LISTEN;
return lws_context_init_client_ssl(&i, vhost);
}
LWS_VISIBLE void
lws_cancel_service_pt(struct lws *wsi)
{
lws_plat_pipe_signal(wsi);
}
LWS_VISIBLE void
lws_cancel_service(struct lws_context *context)
{
struct lws_context_per_thread *pt = &context->pt[0];
short m = context->count_threads;
if (context->being_destroyed1)
return;
lwsl_info("%s\n", __func__);
while (m--) {
if (pt->pipe_wsi)
lws_plat_pipe_signal(pt->pipe_wsi);
pt++;
}
}
int
lws_create_event_pipes(struct lws_context *context)
{
struct lws *wsi;
int n;
/*
* Create the pt event pipes... these are unique in that they are
* not bound to a vhost or protocol (both are NULL)
*/
for (n = 0; n < context->count_threads; n++) {
if (context->pt[n].pipe_wsi)
continue;
wsi = lws_zalloc(sizeof(*wsi), "event pipe wsi");
if (!wsi) {
lwsl_err("Out of mem\n");
return 1;
}
wsi->context = context;
lws_role_transition(wsi, 0, LRS_UNCONNECTED, &role_ops_pipe);
wsi->protocol = NULL;
wsi->tsi = n;
wsi->vhost = NULL;
wsi->event_pipe = 1;
wsi->desc.sockfd = LWS_SOCK_INVALID;
context->pt[n].pipe_wsi = wsi;
context->count_wsi_allocated++;
if (lws_plat_pipe_create(wsi))
/*
* platform code returns 0 if it actually created pipes
* and initialized pt->dummy_pipe_fds[]. If it used
* some other mechanism outside of signaling in the
* normal event loop, we skip treating the pipe as
* related to dummy_pipe_fds[], adding it to the fds,
* etc.
*/
continue;
wsi->desc.sockfd = context->pt[n].dummy_pipe_fds[0];
lwsl_debug("event pipe fd %d\n", wsi->desc.sockfd);
if (context->event_loop_ops->accept)
context->event_loop_ops->accept(wsi);
if (__insert_wsi_socket_into_fds(context, wsi))
return 1;
}
return 0;
}
void
lws_destroy_event_pipe(struct lws *wsi)
{
lwsl_info("%s\n", __func__);
__remove_wsi_socket_from_fds(wsi);
if (wsi->context->event_loop_ops->wsi_logical_close) {
wsi->context->event_loop_ops->wsi_logical_close(wsi);
lws_plat_pipe_close(wsi);
wsi->context->count_wsi_allocated--;
return;
}
if (wsi->context->event_loop_ops->destroy_wsi)
wsi->context->event_loop_ops->destroy_wsi(wsi);
lws_plat_pipe_close(wsi);
wsi->context->count_wsi_allocated--;
lws_free(wsi);
}
LWS_VISIBLE struct lws_context *
lws_create_context(const struct lws_context_creation_info *info)
{
struct lws_context *context = NULL;
struct lws_plat_file_ops *prev;
#ifndef LWS_NO_DAEMONIZE
int pid_daemon = get_daemonize_pid();
#endif
int n;
#if defined(__ANDROID__)
struct rlimit rt;
#endif
lwsl_info("Initial logging level %d\n", log_level);
lwsl_info("Libwebsockets version: %s\n", library_version);
#ifdef LWS_WITH_IPV6
if (!lws_check_opt(info->options, LWS_SERVER_OPTION_DISABLE_IPV6))
lwsl_info("IPV6 compiled in and enabled\n");
else
lwsl_info("IPV6 compiled in but disabled\n");
#else
lwsl_info("IPV6 not compiled in\n");
#endif
lwsl_info(" LWS_DEF_HEADER_LEN : %u\n", LWS_DEF_HEADER_LEN);
lwsl_info(" LWS_MAX_PROTOCOLS : %u\n", LWS_MAX_PROTOCOLS);
lwsl_info(" LWS_MAX_SMP : %u\n", LWS_MAX_SMP);
lwsl_info(" sizeof (*info) : %ld\n", (long)sizeof(*info));
#if defined(LWS_WITH_STATS)
lwsl_info(" LWS_WITH_STATS : on\n");
#endif
lwsl_info(" SYSTEM_RANDOM_FILEPATH: '%s'\n", SYSTEM_RANDOM_FILEPATH);
#if defined(LWS_WITH_HTTP2)
lwsl_info(" HTTP2 support : available\n");
#else
lwsl_info(" HTTP2 support : not configured\n");
#endif
if (lws_plat_context_early_init())
return NULL;
context = lws_zalloc(sizeof(struct lws_context), "context");
if (!context) {
lwsl_err("No memory for websocket context\n");
return NULL;
}
#if defined(LWS_WITH_TLS)
#if defined(LWS_WITH_MBEDTLS)
context->tls_ops = &tls_ops_mbedtls;
#else
context->tls_ops = &tls_ops_openssl;
#endif
#endif
if (info->pt_serv_buf_size)
context->pt_serv_buf_size = info->pt_serv_buf_size;
else
context->pt_serv_buf_size = 4096;
#if defined(LWS_ROLE_H2)
role_ops_h2.init_context(context, info);
#endif
#if LWS_MAX_SMP > 1
lws_mutex_refcount_init(&context->mr);
#endif
#if defined(LWS_WITH_ESP32)
context->last_free_heap = esp_get_free_heap_size();
#endif
/* default to just the platform fops implementation */
context->fops_platform.LWS_FOP_OPEN = _lws_plat_file_open;
context->fops_platform.LWS_FOP_CLOSE = _lws_plat_file_close;
context->fops_platform.LWS_FOP_SEEK_CUR = _lws_plat_file_seek_cur;
context->fops_platform.LWS_FOP_READ = _lws_plat_file_read;
context->fops_platform.LWS_FOP_WRITE = _lws_plat_file_write;
context->fops_platform.fi[0].sig = NULL;
/*
* arrange a linear linked-list of fops starting from context->fops
*
* platform fops
* [ -> fops_zip (copied into context so .next settable) ]
* [ -> info->fops ]
*/
context->fops = &context->fops_platform;
prev = (struct lws_plat_file_ops *)context->fops;
#if defined(LWS_WITH_ZIP_FOPS)
/* make a soft copy so we can set .next */
context->fops_zip = fops_zip;
prev->next = &context->fops_zip;
prev = (struct lws_plat_file_ops *)prev->next;
#endif
/* if user provided fops, tack them on the end of the list */
if (info->fops)
prev->next = info->fops;
context->reject_service_keywords = info->reject_service_keywords;
if (info->external_baggage_free_on_destroy)
context->external_baggage_free_on_destroy =
info->external_baggage_free_on_destroy;
context->time_up = time(NULL);
context->pcontext_finalize = info->pcontext;
context->simultaneous_ssl_restriction =
info->simultaneous_ssl_restriction;
#ifndef LWS_NO_DAEMONIZE
if (pid_daemon) {
context->started_with_parent = pid_daemon;
lwsl_info(" Started with daemon pid %d\n", pid_daemon);
}
#endif
#if defined(__ANDROID__)
n = getrlimit ( RLIMIT_NOFILE,&rt);
if (-1 == n) {
lwsl_err("Get RLIMIT_NOFILE failed!\n");
return NULL;
}
context->max_fds = rt.rlim_cur;
#else
context->max_fds = getdtablesize();
#endif
if (info->count_threads)
context->count_threads = info->count_threads;
else
context->count_threads = 1;
if (context->count_threads > LWS_MAX_SMP)
context->count_threads = LWS_MAX_SMP;
context->token_limits = info->token_limits;
context->options = info->options;
/*
* set the context event loops ops struct
*
* after this, all event_loop actions use the generic ops
*/
#if defined(LWS_WITH_POLL)
context->event_loop_ops = &event_loop_ops_poll;
#endif
if (lws_check_opt(context->options, LWS_SERVER_OPTION_LIBUV))
#if defined(LWS_WITH_LIBUV)
context->event_loop_ops = &event_loop_ops_uv;
#else
goto fail_event_libs;
#endif
if (lws_check_opt(context->options, LWS_SERVER_OPTION_LIBEV))
#if defined(LWS_WITH_LIBEV)
context->event_loop_ops = &event_loop_ops_ev;
#else
goto fail_event_libs;
#endif
if (lws_check_opt(context->options, LWS_SERVER_OPTION_LIBEVENT))
#if defined(LWS_WITH_LIBEVENT)
context->event_loop_ops = &event_loop_ops_event;
#else
goto fail_event_libs;
#endif
if (!context->event_loop_ops)
goto fail_event_libs;
lwsl_info("Using event loop: %s\n", context->event_loop_ops->name);
#if defined(LWS_WITH_TLS)
time(&context->tls.last_cert_check_s);
if (info->alpn)
context->tls.alpn_default = info->alpn;
else {
char *p = context->tls.alpn_discovered, first = 1;
LWS_FOR_EVERY_AVAILABLE_ROLE_START(ar) {
if (ar->alpn) {
if (!first)
*p++ = ',';
p += lws_snprintf(p,
context->tls.alpn_discovered +
sizeof(context->tls.alpn_discovered) -
2 - p, "%s", ar->alpn);
first = 0;
}
} LWS_FOR_EVERY_AVAILABLE_ROLE_END;
context->tls.alpn_default = context->tls.alpn_discovered;
}
lwsl_info("Default ALPN advertisment: %s\n", context->tls.alpn_default);
#endif
if (info->timeout_secs)
context->timeout_secs = info->timeout_secs;
else
context->timeout_secs = AWAITING_TIMEOUT;
context->ws_ping_pong_interval = info->ws_ping_pong_interval;
lwsl_info(" default timeout (secs): %u\n", context->timeout_secs);
if (info->max_http_header_data)
context->max_http_header_data = info->max_http_header_data;
else
if (info->max_http_header_data2)
context->max_http_header_data =
info->max_http_header_data2;
else
context->max_http_header_data = LWS_DEF_HEADER_LEN;
if (info->max_http_header_pool)
context->max_http_header_pool = info->max_http_header_pool;
else
if (info->max_http_header_pool2)
context->max_http_header_pool =
info->max_http_header_pool2;
else
context->max_http_header_pool = context->max_fds;
if (info->fd_limit_per_thread)
context->fd_limit_per_thread = info->fd_limit_per_thread;
else
context->fd_limit_per_thread = context->max_fds /
context->count_threads;
/*
* Allocate the per-thread storage for scratchpad buffers,
* and header data pool
*/
for (n = 0; n < context->count_threads; n++) {
context->pt[n].serv_buf = lws_malloc(context->pt_serv_buf_size,
"pt_serv_buf");
if (!context->pt[n].serv_buf) {
lwsl_err("OOM\n");
return NULL;
}
context->pt[n].context = context;
context->pt[n].tid = n;
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
context->pt[n].http.ah_list = NULL;
context->pt[n].http.ah_pool_length = 0;
#endif
lws_pt_mutex_init(&context->pt[n]);
}
lwsl_info(" Threads: %d each %d fds\n", context->count_threads,
context->fd_limit_per_thread);
if (!info->ka_interval && info->ka_time > 0) {
lwsl_err("info->ka_interval can't be 0 if ka_time used\n");
return NULL;
}
#if defined(LWS_WITH_PEER_LIMITS)
/* scale the peer hash table according to the max fds for the process,
* so that the max list depth averages 16. Eg, 1024 fd -> 64,
* 102400 fd -> 6400
*/
context->pl_hash_elements =
(context->count_threads * context->fd_limit_per_thread) / 16;
context->pl_hash_table = lws_zalloc(sizeof(struct lws_peer *) *
context->pl_hash_elements, "peer limits hash table");
context->ip_limit_ah = info->ip_limit_ah;
context->ip_limit_wsi = info->ip_limit_wsi;
#endif
lwsl_info(" mem: context: %5lu B (%ld ctx + (%ld thr x %d))\n",
(long)sizeof(struct lws_context) +
(context->count_threads * context->pt_serv_buf_size),
(long)sizeof(struct lws_context),
(long)context->count_threads,
context->pt_serv_buf_size);
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
lwsl_info(" mem: http hdr rsvd: %5lu B (%u thr x (%u + %lu) x %u))\n",
(long)(context->max_http_header_data +
sizeof(struct allocated_headers)) *
context->max_http_header_pool * context->count_threads,
context->count_threads,
context->max_http_header_data,
(long)sizeof(struct allocated_headers),
context->max_http_header_pool);
#endif
n = sizeof(struct lws_pollfd) * context->count_threads *
context->fd_limit_per_thread;
context->pt[0].fds = lws_zalloc(n, "fds table");
if (context->pt[0].fds == NULL) {
lwsl_err("OOM allocating %d fds\n", context->max_fds);
goto bail;
}
lwsl_info(" mem: pollfd map: %5u\n", n);
if (info->server_string) {
context->server_string = info->server_string;
context->server_string_len = (short)
strlen(context->server_string);
}
#if LWS_MAX_SMP > 1
/* each thread serves his own chunk of fds */
for (n = 1; n < (int)info->count_threads; n++)
context->pt[n].fds = context->pt[n - 1].fds +
context->fd_limit_per_thread;
#endif
if (lws_plat_init(context, info))
goto bail;
if (context->event_loop_ops->init_context)
if (context->event_loop_ops->init_context(context, info))
goto bail;
if (context->event_loop_ops->init_pt)
for (n = 0; n < context->count_threads; n++) {
void *lp = NULL;
if (info->foreign_loops)
lp = info->foreign_loops[n];
if (context->event_loop_ops->init_pt(context, lp, n))
goto bail;
}
if (lws_create_event_pipes(context))
goto bail;
lws_context_init_ssl_library(info);
context->user_space = info->user;
/*
* if he's not saying he'll make his own vhosts later then act
* compatibly and make a default vhost using the data in the info
*/
if (!lws_check_opt(info->options, LWS_SERVER_OPTION_EXPLICIT_VHOSTS))
if (!lws_create_vhost(context, info)) {
lwsl_err("Failed to create default vhost\n");
for (n = 0; n < context->count_threads; n++)
lws_free_set_NULL(context->pt[n].serv_buf);
#if defined(LWS_WITH_PEER_LIMITS)
lws_free_set_NULL(context->pl_hash_table);
#endif
lws_free_set_NULL(context->pt[0].fds);
lws_plat_context_late_destroy(context);
lws_free_set_NULL(context);
return NULL;
}
lws_context_init_extensions(info, context);
lwsl_info(" mem: per-conn: %5lu bytes + protocol rx buf\n",
(unsigned long)sizeof(struct lws));
strcpy(context->canonical_hostname, "unknown");
lws_server_get_canonical_hostname(context, info);
context->uid = info->uid;
context->gid = info->gid;
#if defined(LWS_HAVE_SYS_CAPABILITY_H) && defined(LWS_HAVE_LIBCAP)
memcpy(context->caps, info->caps, sizeof(context->caps));
context->count_caps = info->count_caps;
#endif
/*
* drop any root privs for this process
* to listen on port < 1023 we would have needed root, but now we are
* listening, we don't want the power for anything else
*/
if (!lws_check_opt(info->options, LWS_SERVER_OPTION_EXPLICIT_VHOSTS))
lws_plat_drop_app_privileges(info);
/* expedite post-context init (eg, protocols) */
lws_cancel_service(context);
#if defined(LWS_WITH_SELFTESTS)
lws_jws_selftest();
#endif
return context;
bail:
lws_context_destroy(context);
return NULL;
fail_event_libs:
lwsl_err("Requested event library support not configured, available:\n");
{
const struct lws_event_loop_ops **elops = available_event_libs;
while (*elops) {
lwsl_err(" - %s\n", (*elops)->name);
elops++;
}
}
lws_free(context);
return NULL;
}
LWS_VISIBLE LWS_EXTERN void
lws_context_deprecate(struct lws_context *context, lws_reload_func cb)
{
struct lws_vhost *vh = context->vhost_list, *vh1;
/*
* "deprecation" means disable the context from accepting any new
* connections and free up listen sockets to be used by a replacement
* context.
*
* Otherwise the deprecated context remains operational, until its
* number of connected sockets falls to zero, when it is deleted.
*/
/* for each vhost, close his listen socket */
while (vh) {
struct lws *wsi = vh->lserv_wsi;
if (wsi) {
wsi->socket_is_permanently_unusable = 1;
lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS, "ctx deprecate");
wsi->context->deprecation_pending_listen_close_count++;
/*
* other vhosts can share the listen port, they
* point to the same wsi. So zap those too.
*/
vh1 = context->vhost_list;
while (vh1) {
if (vh1->lserv_wsi == wsi)
vh1->lserv_wsi = NULL;
vh1 = vh1->vhost_next;
}
}
vh = vh->vhost_next;
}
context->deprecated = 1;
context->deprecation_cb = cb;
}
LWS_VISIBLE LWS_EXTERN int
lws_context_is_deprecated(struct lws_context *context)
{
return context->deprecated;
}
void
lws_vhost_destroy1(struct lws_vhost *vh)
{
struct lws_context *context = vh->context;
lwsl_info("%s\n", __func__);
lws_context_lock(context, "vhost destroy 1"); /* ---------- context { */
if (vh->being_destroyed)
goto out;
lws_vhost_lock(vh); /* -------------- vh { */
vh->being_destroyed = 1;
/*
* PHASE 1: take down or reassign any listen wsi
*
* Are there other vhosts that are piggybacking on our listen socket?
* If so we need to hand the listen socket off to one of the others
* so it will remain open.
*
* If not, leave it attached to the closing vhost, the vh being marked
* being_destroyed will defeat any service and it will get closed in
* later phases.
*/
if (vh->lserv_wsi)
lws_start_foreach_ll(struct lws_vhost *, v,
context->vhost_list) {
if (v != vh &&
!v->being_destroyed &&
v->listen_port == vh->listen_port &&
((!v->iface && !vh->iface) ||
(v->iface && vh->iface &&
!strcmp(v->iface, vh->iface)))) {
/*
* this can only be a listen wsi, which is
* restricted... it has no protocol or other
* bindings or states. So we can simply
* swap it to a vhost that has the same
* iface + port, but is not closing.
*/
assert(v->lserv_wsi == NULL);
v->lserv_wsi = vh->lserv_wsi;
lwsl_notice("%s: listen skt from %s to %s\n",
__func__, vh->name, v->name);
if (v->lserv_wsi) {
lws_vhost_unbind_wsi(vh->lserv_wsi);
lws_vhost_bind_wsi(v, v->lserv_wsi);
}
break;
}
} lws_end_foreach_ll(v, vhost_next);
lws_vhost_unlock(vh); /* } vh -------------- */
/*
* lws_check_deferred_free() will notice there is a vhost that is
* marked for destruction during the next 1s, for all tsi.
*
* It will start closing all wsi on this vhost. When the last wsi
* is closed, it will trigger lws_vhost_destroy2()
*/
out:
lws_context_unlock(context); /* --------------------------- context { */
}
void
__lws_vhost_destroy2(struct lws_vhost *vh)
{
const struct lws_protocols *protocol = NULL;
struct lws_context *context = vh->context;
struct lws_deferred_free *df;
struct lws wsi;
int n;
/*
* destroy any pending timed events
*/
while (vh->timed_vh_protocol_list)
lws_timed_callback_remove(vh, vh->timed_vh_protocol_list);
/*
* let the protocols destroy the per-vhost protocol objects
*/
memset(&wsi, 0, sizeof(wsi));
wsi.context = vh->context;
wsi.vhost = vh; /* not a real bound wsi */
protocol = vh->protocols;
if (protocol && vh->created_vhost_protocols) {
n = 0;
while (n < vh->count_protocols) {
wsi.protocol = protocol;
protocol->callback(&wsi, LWS_CALLBACK_PROTOCOL_DESTROY,
NULL, NULL, 0);
protocol++;
n++;
}
}
/*
* remove vhost from context list of vhosts
*/
lws_start_foreach_llp(struct lws_vhost **, pv, context->vhost_list) {
if (*pv == vh) {
*pv = vh->vhost_next;
break;
}
} lws_end_foreach_llp(pv, vhost_next);
/* add ourselves to the pending destruction list */
vh->vhost_next = vh->context->vhost_pending_destruction_list;
vh->context->vhost_pending_destruction_list = vh;
lwsl_info("%s: %p\n", __func__, vh);
/* if we are still on deferred free list, remove ourselves */
lws_start_foreach_llp(struct lws_deferred_free **, pdf,
context->deferred_free_list) {
if ((*pdf)->payload == vh) {
df = *pdf;
*pdf = df->next;
lws_free(df);
break;
}
} lws_end_foreach_llp(pdf, next);
/* remove ourselves from the pending destruction list */
lws_start_foreach_llp(struct lws_vhost **, pv,
context->vhost_pending_destruction_list) {
if ((*pv) == vh) {
*pv = (*pv)->vhost_next;
break;
}
} lws_end_foreach_llp(pv, vhost_next);
/*
* Free all the allocations associated with the vhost
*/
protocol = vh->protocols;
if (protocol) {
n = 0;
while (n < vh->count_protocols) {
if (vh->protocol_vh_privs &&
vh->protocol_vh_privs[n]) {
lws_free(vh->protocol_vh_privs[n]);
vh->protocol_vh_privs[n] = NULL;
}
protocol++;
n++;
}
}
if (vh->protocol_vh_privs)
lws_free(vh->protocol_vh_privs);
lws_ssl_SSL_CTX_destroy(vh);
lws_free(vh->same_vh_protocol_heads);
if (context->plugin_list ||
(context->options & LWS_SERVER_OPTION_EXPLICIT_VHOSTS))
lws_free((void *)vh->protocols);
LWS_FOR_EVERY_AVAILABLE_ROLE_START(ar)
if (ar->destroy_vhost)
ar->destroy_vhost(vh);
LWS_FOR_EVERY_AVAILABLE_ROLE_END;
#ifdef LWS_WITH_ACCESS_LOG
if (vh->log_fd != (int)LWS_INVALID_FILE)
close(vh->log_fd);
#endif
#if defined (LWS_WITH_TLS)
lws_free_set_NULL(vh->tls.alloc_cert_path);
#endif
#if LWS_MAX_SMP > 1
pthread_mutex_destroy(&vh->lock);
#endif
#if defined(LWS_WITH_UNIX_SOCK)
if (LWS_UNIX_SOCK_ENABLED(vh)) {
n = unlink(vh->iface);
if (n)
lwsl_info("Closing unix socket %s: errno %d\n",
vh->iface, errno);
}
#endif
/*
* although async event callbacks may still come for wsi handles with
* pending close in the case of asycn event library like libuv,
* they do not refer to the vhost. So it's safe to free.
*/
if (vh->finalize)
vh->finalize(vh, vh->finalize_arg);
lwsl_info(" %s: Freeing vhost %p\n", __func__, vh);
memset(vh, 0, sizeof(*vh));
lws_free(vh);
}
/*
* each service thread calls this once a second or so
*/
int
lws_check_deferred_free(struct lws_context *context, int tsi, int force)
{
struct lws_context_per_thread *pt;
int n;
/*
* If we see a vhost is being destroyed, forcibly close every wsi on
* this tsi associated with this vhost. That will include the listen
* socket if it is still associated with the closing vhost.
*
* For SMP, we do this once per tsi per destroyed vhost. The reference
* counting on the vhost as the bound wsi close will notice that there
* are no bound wsi left, that vhost destruction can complete,
* and perform it. It doesn't matter which service thread does that
* because there is nothing left using the vhost to conflict.
*/
lws_context_lock(context, "check deferred free"); /* ------ context { */
lws_start_foreach_ll_safe(struct lws_vhost *, v, context->vhost_list, vhost_next) {
if (v->being_destroyed
#if LWS_MAX_SMP > 1
&& !v->close_flow_vs_tsi[tsi]
#endif
) {
pt = &context->pt[tsi];
lws_pt_lock(pt, "vhost removal"); /* -------------- pt { */
#if LWS_MAX_SMP > 1
v->close_flow_vs_tsi[tsi] = 1;
#endif
for (n = 0; (unsigned int)n < pt->fds_count; n++) {
struct lws *wsi = wsi_from_fd(context, pt->fds[n].fd);
if (!wsi)
continue;
if (wsi->vhost != v)
continue;
__lws_close_free_wsi(wsi,
LWS_CLOSE_STATUS_NOSTATUS_CONTEXT_DESTROY,
"vh destroy"
/* no protocol close */);
n--;
}
lws_pt_unlock(pt); /* } pt -------------- */
}
} lws_end_foreach_ll_safe(v);
lws_context_unlock(context); /* } context ------------------- */
return 0;
}
LWS_VISIBLE void
lws_vhost_destroy(struct lws_vhost *vh)
{
struct lws_deferred_free *df = lws_malloc(sizeof(*df), "deferred free");
struct lws_context *context = vh->context;
if (!df)
return;
lws_context_lock(context, __func__); /* ------ context { */
lws_vhost_destroy1(vh);
if (!vh->count_bound_wsi) {
/*
* After listen handoff, there are already no wsi bound to this
* vhost by any pt: nothing can be servicing any wsi belonging
* to it any more.
*
* Finalize the vh destruction immediately
*/
__lws_vhost_destroy2(vh);
lws_free(df);
goto out;
}
/* part 2 is deferred to allow all the handle closes to complete */
df->next = vh->context->deferred_free_list;
df->deadline = lws_now_secs();
df->payload = vh;
vh->context->deferred_free_list = df;
out:
lws_context_unlock(context); /* } context ------------------- */
}
/*
* When using an event loop, the context destruction is in three separate
* parts. This is to cover both internal and foreign event loops cleanly.
*
* - lws_context_destroy() simply starts a soft close of all wsi and
* related allocations. The event loop continues.
*
* As the closes complete in the event loop, reference counting is used
* to determine when everything is closed. It then calls
* lws_context_destroy2().
*
* - lws_context_destroy2() cleans up the rest of the higher-level logical
* lws pieces like vhosts. If the loop was foreign, it then proceeds to
* lws_context_destroy3(). If it the loop is internal, it stops the
* internal loops and waits for lws_context_destroy() to be called again
* outside the event loop (since we cannot destroy the loop from
* within the loop). That will cause lws_context_destroy3() to run
* directly.
*
* - lws_context_destroy3() destroys any internal event loops and then
* destroys the context itself, setting what was info.pcontext to NULL.
*/
/*
* destroy the actual context itself
*/
static void
lws_context_destroy3(struct lws_context *context)
{
struct lws_context **pcontext_finalize = context->pcontext_finalize;
int n;
for (n = 0; n < context->count_threads; n++) {
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
struct lws_context_per_thread *pt = &context->pt[n];
#endif
if (context->event_loop_ops->destroy_pt)
context->event_loop_ops->destroy_pt(context, n);
lws_free_set_NULL(context->pt[n].serv_buf);
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
while (pt->http.ah_list)
_lws_destroy_ah(pt, pt->http.ah_list);
#endif
}
lws_free(context);
lwsl_info("%s: ctx %p freed\n", __func__, context);
if (pcontext_finalize)
*pcontext_finalize = NULL;
}
/*
* really start destroying things
*/
void
lws_context_destroy2(struct lws_context *context)
{
struct lws_vhost *vh = NULL, *vh1;
#if defined(LWS_WITH_PEER_LIMITS)
uint32_t nu;
#endif
lwsl_info("%s: ctx %p\n", __func__, context);
lws_context_lock(context, "context destroy 2"); /* ------ context { */
context->being_destroyed2 = 1;
if (context->pt[0].fds)
lws_free_set_NULL(context->pt[0].fds);
/*
* free all the per-vhost allocations
*/
vh = context->vhost_list;
while (vh) {
vh1 = vh->vhost_next;
__lws_vhost_destroy2(vh);
vh = vh1;
}
/* remove ourselves from the pending destruction list */
while (context->vhost_pending_destruction_list)
/* removes itself from list */
__lws_vhost_destroy2(context->vhost_pending_destruction_list);
lws_stats_log_dump(context);
lws_ssl_context_destroy(context);
lws_plat_context_late_destroy(context);
#if defined(LWS_WITH_PEER_LIMITS)
for (nu = 0; nu < context->pl_hash_elements; nu++) {
lws_start_foreach_llp(struct lws_peer **, peer,
context->pl_hash_table[nu]) {
struct lws_peer *df = *peer;
*peer = df->next;
lws_free(df);
continue;
} lws_end_foreach_llp(peer, next);
}
lws_free(context->pl_hash_table);
#endif
if (context->external_baggage_free_on_destroy)
free(context->external_baggage_free_on_destroy);
lws_check_deferred_free(context, 0, 1);
#if LWS_MAX_SMP > 1
lws_mutex_refcount_destroy(&context->mr);
#endif
if (context->event_loop_ops->destroy_context2)
if (context->event_loop_ops->destroy_context2(context)) {
lws_context_unlock(context); /* } context ----------- */
context->finalize_destroy_after_internal_loops_stopped = 1;
return;
}
if (!context->pt[0].event_loop_foreign) {
int n;
for (n = 0; n < context->count_threads; n++)
if (context->pt[n].inside_service) {
lws_context_unlock(context); /* } context --- */
return;
}
}
lws_context_unlock(context); /* } context ------------------- */
lws_context_destroy3(context);
}
/*
* Begin the context takedown
*/
LWS_VISIBLE void
lws_context_destroy(struct lws_context *context)
{
volatile struct lws_foreign_thread_pollfd *ftp, *next;
volatile struct lws_context_per_thread *vpt;
struct lws_vhost *vh = NULL;
struct lws wsi;
int n, m;
if (!context)
return;
if (context->finalize_destroy_after_internal_loops_stopped) {
if (context->event_loop_ops->destroy_context2)
context->event_loop_ops->destroy_context2(context);
lws_context_destroy3(context);
return;
}
if (context->being_destroyed1) {
if (!context->being_destroyed2) {
lws_context_destroy2(context);
return;
}
lwsl_info("%s: ctx %p: already being destroyed\n",
__func__, context);
lws_context_destroy3(context);
return;
}
lwsl_info("%s: ctx %p\n", __func__, context);
m = context->count_threads;
context->being_destroyed = 1;
context->being_destroyed1 = 1;
context->requested_kill = 1;
memset(&wsi, 0, sizeof(wsi));
wsi.context = context;
#ifdef LWS_LATENCY
if (context->worst_latency_info[0])
lwsl_notice("Worst latency: %s\n", context->worst_latency_info);
#endif
while (m--) {
struct lws_context_per_thread *pt = &context->pt[m];
vpt = (volatile struct lws_context_per_thread *)pt;
ftp = vpt->foreign_pfd_list;
while (ftp) {
next = ftp->next;
lws_free((void *)ftp);
ftp = next;
}
vpt->foreign_pfd_list = NULL;
for (n = 0; (unsigned int)n < context->pt[m].fds_count; n++) {
struct lws *wsi = wsi_from_fd(context, pt->fds[n].fd);
if (!wsi)
continue;
if (wsi->event_pipe)
lws_destroy_event_pipe(wsi);
else
lws_close_free_wsi(wsi,
LWS_CLOSE_STATUS_NOSTATUS_CONTEXT_DESTROY,
"ctx destroy"
/* no protocol close */);
n--;
}
lws_pt_mutex_destroy(pt);
}
/*
* inform all the protocols that they are done and will have no more
* callbacks.
*
* We can't free things until after the event loop shuts down.
*/
if (context->protocol_init_done)
vh = context->vhost_list;
while (vh) {
struct lws_vhost *vhn = vh->vhost_next;
lws_vhost_destroy1(vh);
vh = vhn;
}
lws_plat_context_early_destroy(context);
/*
* We face two different needs depending if foreign loop or not.
*
* 1) If foreign loop, we really want to advance the destroy_context()
* past here, and block only for libuv-style async close completion.
*
* 2a) If poll, and we exited by ourselves and are calling a final
* destroy_context() outside of any service already, we want to
* advance all the way in one step.
*
* 2b) If poll, and we are reacting to a SIGINT, service thread(s) may
* be in poll wait or servicing. We can't advance the
* destroy_context() to the point it's freeing things; we have to
* leave that for the final destroy_context() after the service
* thread(s) are finished calling for service.
*/
if (context->event_loop_ops->destroy_context1) {
context->event_loop_ops->destroy_context1(context);
return;
}
lws_context_destroy2(context);
}