Merge pull request #14888 from Faless/websocket

Websocket module

1 files changed, 1628 insertions, 0 deletions

diff --git a/thirdparty/lws/context.c b/thirdparty/lws/context.c
new file mode 100644
index 0000000000..f67476b1e3
--- /dev/null
+++ b/thirdparty/lws/context.c
@@ -0,0 +1,1628 @@
+/*
+ * libwebsockets - small server side websockets and web server implementation
+ *
+ * Copyright (C) 2010-2017 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 "private-libwebsockets.h"
+
+#ifndef LWS_BUILD_HASH
+#define LWS_BUILD_HASH "unknown-build-hash"
+#endif
+
+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;
+}
+
+static const char * const mount_protocols[] = {
+	"http://",
+	"https://",
+	"file://",
+	"cgi://",
+	">http://",
+	">https://",
+	"callback://"
+};
+
+#if defined(LWS_WITH_HTTP2)
+/*
+ * These are the standardized defaults.
+ * Override what actually goes in the vhost settings in platform or user code.
+ * Leave these alone because they are used to determine "what is different
+ * from the protocol defaults".
+ */
+const struct http2_settings lws_h2_defaults = { {
+	1,
+	/* H2SET_HEADER_TABLE_SIZE */			4096,
+	/* *** This controls how many entries in the dynamic table ***
+	 * Allows the sender to inform the remote endpoint of the maximum
+	 * size of the header compression table used to decode header
+	 * blocks, in octets.  The encoder can select any size equal to or
+	 * less than this value by using signaling specific to the header
+	 * compression format inside a header block (see [COMPRESSION]).
+	 * The initial value is 4,096 octets.
+	 */
+	/* H2SET_ENABLE_PUSH */				   1,
+	/* H2SET_MAX_CONCURRENT_STREAMS */	  0x7fffffff,
+	/* H2SET_INITIAL_WINDOW_SIZE */		       65535,
+	/* H2SET_MAX_FRAME_SIZE */		       16384,
+	/* H2SET_MAX_HEADER_LIST_SIZE */	  0x7fffffff,
+	/*< This advisory setting informs a peer of the maximum size of
+	 * header list that the sender is prepared to accept, in octets.
+	 * The value is based on the uncompressed size of header fields,
+	 * including the length of the name and value in octets plus an
+	 * overhead of 32 octets for each header field.
+	 */
+
+}};
+
+const struct http2_settings lws_h2_stock_settings = { {
+	1,
+	/* H2SET_HEADER_TABLE_SIZE */			4096,
+	/* *** This controls how many entries in the dynamic table ***
+	 * Allows the sender to inform the remote endpoint of the maximum
+	 * size of the header compression table used to decode header
+	 * blocks, in octets.  The encoder can select any size equal to or
+	 * less than this value by using signaling specific to the header
+	 * compression format inside a header block (see [COMPRESSION]).
+	 * The initial value is 4,096 octets.
+	 *
+	 * Can't pass h2spec with less than 4096 here...
+	 */
+	/* H2SET_ENABLE_PUSH */				   1,
+	/* H2SET_MAX_CONCURRENT_STREAMS */		  24,
+	/* H2SET_INITIAL_WINDOW_SIZE */		       65535,
+	/* H2SET_MAX_FRAME_SIZE */		       16384,
+	/* H2SET_MAX_HEADER_LIST_SIZE */	  	4096,
+	/*< This advisory setting informs a peer of the maximum size of
+	 * header list that the sender is prepared to accept, in octets.
+	 * The value is based on the uncompressed size of header fields,
+	 * including the length of the name and value in octets plus an
+	 * overhead of 32 octets for each header field.
+	 */
+
+}};
+#endif
+
+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)
+		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;
+
+	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)
+			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_notice(
+						"    vhost \"%s\", protocol \"%s\", option \"%s\"\n",
+							vh->name,
+							vh->protocols[n].name,
+							pvo->name);
+
+					if (!strcmp(pvo->name, "default")) {
+						lwsl_notice("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_notice("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;
+			}
+
+			/*
+			 * 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)) {
+				lwsl_err("%s: vhost %s failed init\n", __func__,
+					 vh->protocols[n].name);
+				context->doing_protocol_init = 0;
+				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;
+
+	return 0;
+}
+
+LWS_VISIBLE int
+lws_callback_http_dummy(struct lws *wsi, enum lws_callback_reasons reason,
+		    void *user, void *in, size_t len)
+{
+	struct lws_ssl_info *si;
+#ifdef LWS_WITH_CGI
+	struct lws_cgi_args *args;
+#endif
+#if defined(LWS_WITH_CGI) || defined(LWS_WITH_HTTP_PROXY)
+	char buf[512];
+	int n;
+#endif
+
+	switch (reason) {
+	case LWS_CALLBACK_HTTP:
+#ifndef LWS_NO_SERVER
+		if (lws_return_http_status(wsi, HTTP_STATUS_NOT_FOUND, NULL))
+			return -1;
+
+		if (lws_http_transaction_completed(wsi))
+#endif
+			return -1;
+		break;
+#if !defined(LWS_NO_SERVER)
+	case LWS_CALLBACK_HTTP_FILE_COMPLETION:
+		if (lws_http_transaction_completed(wsi))
+			return -1;
+		break;
+#endif
+
+	case LWS_CALLBACK_HTTP_WRITEABLE:
+#ifdef LWS_WITH_CGI
+		if (wsi->reason_bf & (LWS_CB_REASON_AUX_BF__CGI_HEADERS |
+				      LWS_CB_REASON_AUX_BF__CGI)) {
+			n = lws_cgi_write_split_stdout_headers(wsi);
+			if (n < 0) {
+				lwsl_debug("LWS_CB_REASON_AUX_BF__CGI forcing close\n");
+				return -1;
+			}
+			if (!n)
+				lws_rx_flow_control(wsi->cgi->stdwsi[LWS_STDOUT], 1);
+
+			if (wsi->reason_bf & LWS_CB_REASON_AUX_BF__CGI_HEADERS)
+				wsi->reason_bf &= ~LWS_CB_REASON_AUX_BF__CGI_HEADERS;
+			else
+				wsi->reason_bf &= ~LWS_CB_REASON_AUX_BF__CGI;
+			break;
+		}
+
+		if (wsi->reason_bf & LWS_CB_REASON_AUX_BF__CGI_CHUNK_END) {
+			if (!wsi->http2_substream) {
+				memcpy(buf + LWS_PRE, "0\x0d\x0a\x0d\x0a", 5);
+				lwsl_debug("writing chunk terminator and exiting\n");
+				n = lws_write(wsi, (unsigned char *)buf + LWS_PRE,
+						5, LWS_WRITE_HTTP);
+			} else
+				n = lws_write(wsi, (unsigned char *)buf + LWS_PRE,
+					      0, LWS_WRITE_HTTP_FINAL);
+
+			/* always close after sending it */
+			return -1;
+		}
+#endif
+#if defined(LWS_WITH_HTTP_PROXY)
+		if (wsi->reason_bf & LWS_CB_REASON_AUX_BF__PROXY) {
+			char *px = buf + LWS_PRE;
+			int lenx = sizeof(buf) - LWS_PRE;
+
+			/*
+			 * our sink is writeable and our source has something
+			 * to read.  So read a lump of source material of
+			 * suitable size to send or what's available, whichever
+			 * is the smaller.
+			 */
+			wsi->reason_bf &= ~LWS_CB_REASON_AUX_BF__PROXY;
+			if (!lws_get_child(wsi))
+				break;
+			if (lws_http_client_read(lws_get_child(wsi), &px, &lenx) < 0)
+				return -1;
+			break;
+		}
+#endif
+		break;
+
+#if defined(LWS_WITH_HTTP_PROXY)
+	case LWS_CALLBACK_RECEIVE_CLIENT_HTTP:
+		assert(lws_get_parent(wsi));
+		if (!lws_get_parent(wsi))
+			break;
+		lws_get_parent(wsi)->reason_bf |= LWS_CB_REASON_AUX_BF__PROXY;
+		lws_callback_on_writable(lws_get_parent(wsi));
+		break;
+
+	case LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ:
+		assert(lws_get_parent(wsi));
+		n = lws_write(lws_get_parent(wsi), (unsigned char *)in,
+				len, LWS_WRITE_HTTP);
+		if (n < 0)
+			return -1;
+		break;
+
+	case LWS_CALLBACK_ESTABLISHED_CLIENT_HTTP: {
+		unsigned char *p, *end;
+		char ctype[64], ctlen = 0;
+	
+		p = (unsigned char *)buf + LWS_PRE;
+		end = p + sizeof(buf) - LWS_PRE;
+
+		if (lws_add_http_header_status(lws_get_parent(wsi),
+					       HTTP_STATUS_OK, &p, end))
+			return 1;
+		if (lws_add_http_header_by_token(lws_get_parent(wsi),
+				WSI_TOKEN_HTTP_SERVER,
+			    	(unsigned char *)"libwebsockets",
+				13, &p, end))
+			return 1;
+
+		ctlen = lws_hdr_copy(wsi, ctype, sizeof(ctype),
+				     WSI_TOKEN_HTTP_CONTENT_TYPE);
+		if (ctlen > 0) {
+			if (lws_add_http_header_by_token(lws_get_parent(wsi),
+				WSI_TOKEN_HTTP_CONTENT_TYPE,
+				(unsigned char *)ctype, ctlen, &p, end))
+				return 1;
+		}
+
+		if (lws_finalize_http_header(lws_get_parent(wsi), &p, end))
+			return 1;
+
+		*p = '\0';
+		n = lws_write(lws_get_parent(wsi),
+			      (unsigned char *)buf + LWS_PRE,
+			      p - ((unsigned char *)buf + LWS_PRE),
+			      LWS_WRITE_HTTP_HEADERS);
+		if (n < 0)
+			return -1;
+
+		break; }
+
+#endif
+
+#ifdef LWS_WITH_CGI
+	/* CGI IO events (POLLIN/OUT) appear here, our default policy is:
+	 *
+	 *  - POST data goes on subprocess stdin
+	 *  - subprocess stdout goes on http via writeable callback
+	 *  - subprocess stderr goes to the logs
+	 */
+	case LWS_CALLBACK_CGI:
+		args = (struct lws_cgi_args *)in;
+		switch (args->ch) { /* which of stdin/out/err ? */
+		case LWS_STDIN:
+			/* TBD stdin rx flow control */
+			break;
+		case LWS_STDOUT:
+			/* quench POLLIN on STDOUT until MASTER got writeable */
+			lws_rx_flow_control(args->stdwsi[LWS_STDOUT], 0);
+			wsi->reason_bf |= LWS_CB_REASON_AUX_BF__CGI;
+			/* when writing to MASTER would not block */
+			lws_callback_on_writable(wsi);
+			break;
+		case LWS_STDERR:
+			n = lws_get_socket_fd(args->stdwsi[LWS_STDERR]);
+			if (n < 0)
+				break;
+			n = read(n, buf, sizeof(buf) - 2);
+			if (n > 0) {
+				if (buf[n - 1] != '\n')
+					buf[n++] = '\n';
+				buf[n] = '\0';
+				lwsl_notice("CGI-stderr: %s\n", buf);
+			}
+			break;
+		}
+		break;
+
+	case LWS_CALLBACK_CGI_TERMINATED:
+		lwsl_debug("LWS_CALLBACK_CGI_TERMINATED: %d %" PRIu64 "\n",
+				wsi->cgi->explicitly_chunked,
+				(uint64_t)wsi->cgi->content_length);
+		if (!wsi->cgi->explicitly_chunked &&
+		    !wsi->cgi->content_length) {
+			/* send terminating chunk */
+			lwsl_debug("LWS_CALLBACK_CGI_TERMINATED: ending\n");
+			wsi->reason_bf |= LWS_CB_REASON_AUX_BF__CGI_CHUNK_END;
+			lws_callback_on_writable(wsi);
+			lws_set_timeout(wsi, PENDING_TIMEOUT_CGI, 3);
+			break;
+		}
+		return -1;
+
+	case LWS_CALLBACK_CGI_STDIN_DATA:  /* POST body for stdin */
+		args = (struct lws_cgi_args *)in;
+		args->data[args->len] = '\0';
+		n = lws_get_socket_fd(args->stdwsi[LWS_STDIN]);
+		if (n < 0)
+			return -1;
+		n = write(n, args->data, args->len);
+		if (n < args->len)
+			lwsl_notice("LWS_CALLBACK_CGI_STDIN_DATA: "
+				    "sent %d only %d went", n, args->len);
+		return n;
+#endif
+
+	case LWS_CALLBACK_SSL_INFO:
+		si = in;
+
+		(void)si;
+		lwsl_notice("LWS_CALLBACK_SSL_INFO: where: 0x%x, ret: 0x%x\n",
+			    si->where, si->ret);
+		break;
+
+	default:
+		break;
+	}
+
+	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,			/* max frame size / rx buffer */
+		0, NULL, 0
+	},
+	/*
+	 * 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,
+		 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_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;
+#ifdef LWS_HAVE_GETENV
+	char *p;
+#endif
+	int n;
+
+	if (!vh)
+		return NULL;
+
+	if (!info->protocols)
+		info->protocols = &protocols_dummy[0];
+
+	vh->context = context;
+	if (!info->vhost_name)
+		vh->name = "default";
+	else
+		vh->name = info->vhost_name;
+
+	if (info->options & LWS_SERVER_OPTION_ONLY_RAW)
+		lwsl_info("%s set to only support RAW\n", vh->name);
+
+#if defined(LWS_WITH_HTTP2)
+	vh->set = context->set;
+	if (info->http2_settings[0])
+		for (n = 1; n < LWS_H2_SETTINGS_LEN; n++)
+			vh->set.s[n] = info->http2_settings[n];
+#endif
+
+	vh->iface = info->iface;
+#if !defined(LWS_WITH_ESP8266) && !defined(LWS_WITH_ESP32) && !defined(OPTEE_TA) && !defined(WIN32)
+	vh->bind_iface = info->bind_iface;
+#endif
+
+	for (vh->count_protocols = 0;
+	     info->protocols[vh->count_protocols].callback;
+	     vh->count_protocols++)
+		;
+
+	vh->options = info->options;
+	vh->pvo = info->pvo;
+	vh->headers = info->headers;
+	vh->user = info->user;
+	vh->ssl_info_event_mask = info->ssl_info_event_mask;
+	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;
+
+	/*
+	 * 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, info->protocols, 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 = info->protocols;
+		lws_free(lwsp);
+	}
+
+	vh->same_vh_protocol_list = (struct lws **)
+			lws_zalloc(sizeof(struct lws *) * vh->count_protocols, "same vh list");
+
+	vh->mount_list = info->mounts;
+
+#ifdef LWS_WITH_UNIX_SOCK
+	if (LWS_UNIX_SOCK_ENABLED(context)) {
+		lwsl_notice("Creating Vhost '%s' path \"%s\", %d protocols\n",
+				vh->name, info->iface, vh->count_protocols);
+	} else
+#endif
+	lwsl_notice("Creating Vhost '%s' port %d, %d protocols, IPv6 %s\n",
+			vh->name, info->port, vh->count_protocols,
+			LWS_IPV6_ENABLED(vh) ? "on" : "off");
+
+	mounts = info->mounts;
+	while (mounts) {
+		(void)mount_protocols[0];
+		lwsl_notice("   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)) {
+					((struct lws_protocol_vhost_options *)pvo)->value =
+							(const char *)(lws_intptr_t)n;
+					break;
+				}
+			if (n == vh->count_protocols)
+				lwsl_err("ignoring unknown interpret protocol %s\n",
+					 pvo->value);
+			pvo = pvo->next;
+		}
+
+		mounts = mounts->mount_next;
+	}
+
+#ifndef LWS_NO_EXTENSIONS
+#ifdef LWS_WITH_PLUGINS
+	if (context->plugin_extension_count) {
+
+		m = 0;
+		while (info->extensions && info->extensions[m].callback)
+			m++;
+
+		/*
+		 * give the vhost a unified list of extensions including the
+		 * ones that came from plugins
+		 */
+		vh->extensions = lws_zalloc(sizeof(struct lws_extension) *
+					   (m +
+					   context->plugin_extension_count + 1), "extensions");
+		if (!vh->extensions)
+			return NULL;
+
+		memcpy((struct lws_extension *)vh->extensions, info->extensions,
+		       sizeof(struct lws_extension) * m);
+		plugin = context->plugin_list;
+		while (plugin) {
+			memcpy((struct lws_extension *)&vh->extensions[m],
+				plugin->caps.extensions,
+			       sizeof(struct lws_extension) *
+			       plugin->caps.count_extensions);
+			m += plugin->caps.count_extensions;
+			plugin = plugin->list;
+		}
+	} else
+#endif
+		vh->extensions = info->extensions;
+#endif
+
+	vh->listen_port = info->port;
+#if !defined(LWS_WITH_ESP8266)
+	vh->http_proxy_port = 0;
+	vh->http_proxy_address[0] = '\0';
+#if defined(LWS_WITH_SOCKS5)
+	vh->socks_proxy_port = 0;
+	vh->socks_proxy_address[0] = '\0';
+#endif
+
+	/* either use proxy from info, or try get it from env var */
+
+	/* http proxy */
+	if (info->http_proxy_address) {
+		/* override for backwards compatibility */
+		if (info->http_proxy_port)
+			vh->http_proxy_port = info->http_proxy_port;
+		lws_set_proxy(vh, info->http_proxy_address);
+	} else {
+#ifdef LWS_HAVE_GETENV
+		p = getenv("http_proxy");
+		if (p)
+			lws_set_proxy(vh, p);
+#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
+#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 = 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))
+		goto bail;
+	if (lws_context_init_client_ssl(info, vh))
+		goto bail;
+	if (lws_context_init_server(info, vh)) {
+		lwsl_err("init server failed\n");
+		goto bail;
+	}
+
+	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)
+		lws_protocol_init(context);
+
+	return vh;
+
+bail:
+	lws_free(vh);
+
+	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 struct lws_context *
+lws_create_context(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);
+#if defined(GCC_VER)
+	lwsl_info("Compiled with  %s\n", GCC_VER);
+#endif
+#if LWS_POSIX
+#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
+#if !defined(LWS_PLAT_OPTEE) && !defined(LWS_PLAT_ESP32)
+	lws_feature_status_libev(info);
+	lws_feature_status_libuv(info);
+#endif
+#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
+#if LWS_POSIX
+	lwsl_info(" SYSTEM_RANDOM_FILEPATH: '%s'\n", SYSTEM_RANDOM_FILEPATH);
+#endif
+#if defined(LWS_WITH_HTTP2)
+	lwsl_info(" HTTP2 support         : available\n");
+#else
+	lwsl_info(" HTTP2 support         : not configured");
+#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 (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_WITH_HTTP2)
+	context->set = lws_h2_stock_settings;
+#endif
+
+#if LWS_MAX_SMP > 1
+	pthread_mutex_init(&context->lock, NULL);
+#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->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;
+
+	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
+		context->max_http_header_pool = LWS_DEF_HEADER_POOL;
+
+	/*
+	 * 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;
+		}
+
+#ifdef LWS_WITH_LIBUV
+		context->pt[n].context = context;
+#endif
+		context->pt[n].tid = n;
+		context->pt[n].ah_list = NULL;
+		context->pt[n].ah_pool_length = 0;
+
+		lws_pt_mutex_init(&context->pt[n]);
+	}
+
+	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;
+
+	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;
+	}
+
+#ifdef LWS_WITH_LIBEV
+	/* (Issue #264) In order to *avoid breaking backwards compatibility*, we
+	 * enable libev mediated SIGINT handling with a default handler of
+	 * lws_sigint_cb. The handler can be overridden or disabled
+	 * by invoking lws_sigint_cfg after creating the context, but
+	 * before invoking lws_initloop:
+	 */
+	context->use_ev_sigint = 1;
+	context->lws_ev_sigint_cb = &lws_ev_sigint_cb;
+#endif /* LWS_WITH_LIBEV */
+#ifdef LWS_WITH_LIBUV
+	/* (Issue #264) In order to *avoid breaking backwards compatibility*, we
+	 * enable libev mediated SIGINT handling with a default handler of
+	 * lws_sigint_cb. The handler can be overridden or disabled
+	 * by invoking lws_sigint_cfg after creating the context, but
+	 * before invoking lws_initloop:
+	 */
+	context->use_ev_sigint = 1;
+	context->lws_uv_sigint_cb = &lws_uv_sigint_cb;
+#endif
+#ifdef LWS_WITH_LIBEVENT
+	/* (Issue #264) In order to *avoid breaking backwards compatibility*, we
+	 * enable libev mediated SIGINT handling with a default handler of
+	 * lws_sigint_cb. The handler can be overridden or disabled
+	 * by invoking lws_sigint_cfg after creating the context, but
+	 * before invoking lws_initloop:
+	 */
+	context->use_ev_sigint = 1;
+	context->lws_event_sigint_cb = &lws_event_sigint_cb;
+#endif /* LWS_WITH_LIBEVENT */
+
+#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 bytes (%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);
+
+	lwsl_info(" mem: http hdr rsvd:   %5lu bytes (%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);
+	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 defined(LWS_WITH_HTTP2)
+	/*
+	 * let the user code see what the platform default SETTINGS were, he
+	 * can modify them when he creates the vhosts.
+	 */
+	for (n = 1; n < LWS_H2_SETTINGS_LEN; n++)
+		info->http2_settings[n] = context->set.s[n];
+#endif
+
+	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");
+			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);
+
+	/*
+	 * give all extensions a chance to create any per-context
+	 * allocations they need
+	 */
+	if (info->port != CONTEXT_PORT_NO_LISTEN) {
+		if (lws_ext_cb_all_exts(context, NULL,
+			LWS_EXT_CB_SERVER_CONTEXT_CONSTRUCT, NULL, 0) < 0)
+			goto bail;
+	} else
+		if (lws_ext_cb_all_exts(context, NULL,
+			LWS_EXT_CB_CLIENT_CONTEXT_CONSTRUCT, NULL, 0) < 0)
+			goto bail;
+
+	return context;
+
+bail:
+	lws_context_destroy(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;
+	struct lws *wsi;
+
+	/*
+	 * "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) {
+		wsi = vh->lserv_wsi;
+		if (wsi) {
+			wsi->socket_is_permanently_unusable = 1;
+			lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS);
+			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;
+}
+
+LWS_VISIBLE void
+lws_context_destroy2(struct lws_context *context);
+
+
+static void
+lws_vhost_destroy1(struct lws_vhost *vh)
+{
+	const struct lws_protocols *protocol = NULL;
+	struct lws_context_per_thread *pt;
+	int n, m = vh->context->count_threads;
+	struct lws_context *context = vh->context;
+	struct lws wsi;
+
+	lwsl_info("%s\n", __func__);
+
+	if (vh->being_destroyed)
+		return;
+
+	vh->being_destroyed = 1;
+
+	/*
+	 * 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 and it will get closed.
+	 */
+
+	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;
+				vh->lserv_wsi = NULL;
+				if (v->lserv_wsi)
+					v->lserv_wsi->vhost = v;
+
+				lwsl_notice("%s: listen skt from %s to %s\n",
+					    __func__, vh->name, v->name);
+				break;
+			}
+		} lws_end_foreach_ll(v, vhost_next);
+
+	/*
+	 * Forcibly close every wsi assoicated with this vhost.  That will
+	 * include the listen socket if it is still associated with the closing
+	 * vhost.
+	 */
+
+	while (m--) {
+		pt = &context->pt[m];
+
+		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->vhost != vh)
+				continue;
+
+			lws_close_free_wsi(wsi,
+				LWS_CLOSE_STATUS_NOSTATUS_CONTEXT_DESTROY
+				/* no protocol close */);
+			n--;
+		}
+	}
+
+	/*
+	 * let the protocols destroy the per-vhost protocol objects
+	 */
+
+	memset(&wsi, 0, sizeof(wsi));
+	wsi.context = vh->context;
+	wsi.vhost = vh;
+	protocol = vh->protocols;
+	if (protocol) {
+		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;
+}
+
+static 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;
+	int n;
+
+	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_list);
+#ifdef LWS_WITH_PLUGINS
+	if (LWS_LIBUV_ENABLED(context)) {
+		if (context->plugin_list)
+			lws_free((void *)vh->protocols);
+	} else
+#endif
+	{
+		if (context->options & LWS_SERVER_OPTION_EXPLICIT_VHOSTS)
+			lws_free((void *)vh->protocols);
+	}
+
+#ifdef LWS_WITH_PLUGINS
+#ifndef LWS_NO_EXTENSIONS
+	if (context->plugin_extension_count)
+		lws_free((void *)vh->extensions);
+#endif
+#endif
+#ifdef LWS_WITH_ACCESS_LOG
+	if (vh->log_fd != (int)LWS_INVALID_FILE)
+		close(vh->log_fd);
+#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.
+	 */
+
+	lwsl_info("  %s: Freeing vhost %p\n", __func__, vh);
+
+	memset(vh, 0, sizeof(*vh));
+	lws_free(vh);
+}
+
+int
+lws_check_deferred_free(struct lws_context *context, int force)
+{
+	struct lws_deferred_free *df;
+	time_t now = lws_now_secs();
+
+	lws_start_foreach_llp(struct lws_deferred_free **, pdf,
+			      context->deferred_free_list) {
+		if (now > (*pdf)->deadline || force) {
+			df = *pdf;
+			*pdf = df->next;
+			/* finalize vh destruction */
+			lwsl_notice("deferred vh %p destroy\n", df->payload);
+			lws_vhost_destroy2(df->payload);
+			lws_free(df);
+			continue; /* after deletion we already point to next */
+		}
+	} lws_end_foreach_llp(pdf, next);
+
+	return 0;
+}
+
+LWS_VISIBLE void
+lws_vhost_destroy(struct lws_vhost *vh)
+{
+	struct lws_deferred_free *df = lws_malloc(sizeof(*df), "deferred free");
+
+	if (!df)
+		return;
+
+	lws_vhost_destroy1(vh);
+
+	/* part 2 is deferred to allow all the handle closes to complete */
+
+	df->next = vh->context->deferred_free_list;
+	df->deadline = lws_now_secs() + 5;
+	df->payload = vh;
+	vh->context->deferred_free_list = df;
+}
+
+LWS_VISIBLE void
+lws_context_destroy(struct lws_context *context)
+{
+	struct lws_context_per_thread *pt;
+	struct lws_vhost *vh = NULL;
+	struct lws wsi;
+	int n, m;
+
+	if (!context) {
+		lwsl_notice("%s: ctx %p\n", __func__, context);
+		return;
+	}
+	if (context->being_destroyed1) {
+		lwsl_notice("%s: ctx %p: already being destroyed\n",
+			    __func__, context);
+		return;
+	}
+
+	lwsl_info("%s: ctx %p\n", __func__, context);
+
+	m = context->count_threads;
+	context->being_destroyed = 1;
+	context->being_destroyed1 = 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--) {
+		pt = &context->pt[m];
+
+		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;
+
+			lws_close_free_wsi(wsi,
+				LWS_CLOSE_STATUS_NOSTATUS_CONTEXT_DESTROY
+				/* no protocol close */);
+			n--;
+		}
+		lws_pt_mutex_destroy(pt);
+	}
+
+	/*
+	 * give all extensions a chance to clean up any per-context
+	 * allocations they might have made
+	 */
+
+	n = lws_ext_cb_all_exts(context, NULL,
+				LWS_EXT_CB_SERVER_CONTEXT_DESTRUCT, NULL, 0);
+
+	n = lws_ext_cb_all_exts(context, NULL,
+				LWS_EXT_CB_CLIENT_CONTEXT_DESTRUCT, NULL, 0);
+
+	/*
+	 * 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;
+	}
+
+	for (n = 0; n < context->count_threads; n++) {
+		pt = &context->pt[n];
+
+		lws_libev_destroyloop(context, n);
+		lws_libuv_destroyloop(context, n);
+		lws_libevent_destroyloop(context, n);
+
+		lws_free_set_NULL(context->pt[n].serv_buf);
+
+		while (pt->ah_list)
+			_lws_destroy_ah(pt, pt->ah_list);
+	}
+	lws_plat_context_early_destroy(context);
+
+	if (context->pt[0].fds)
+		lws_free_set_NULL(context->pt[0].fds);
+
+	if (!LWS_LIBUV_ENABLED(context))
+		lws_context_destroy2(context);
+}
+
+/*
+ * call the second one after the event loop has been shut down cleanly
+ */
+
+LWS_VISIBLE void
+lws_context_destroy2(struct lws_context *context)
+{
+	struct lws_vhost *vh = NULL, *vh1;
+#if defined(LWS_WITH_PEER_LIMITS)
+	uint32_t n;
+#endif
+
+	lwsl_info("%s: ctx %p\n", __func__, context);
+
+	/*
+	 * 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 (n = 0; n < context->pl_hash_elements; n++)	{
+		lws_start_foreach_llp(struct lws_peer **, peer,
+				      context->pl_hash_table[n]) {
+			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, 1);
+
+#if LWS_MAX_SMP > 1
+	pthread_mutex_destroy(&context->lock, NULL);
+#endif
+
+	lws_free(context);
+}