Thirdparty: Fill copyright for lws, miniupnpc, clipper

Rename `lws` to `libwebsockets` which is its library name.

Add missing license file for mbedtls.

3 files changed, 858 insertions, 0 deletions

diff --git a/thirdparty/libwebsockets/ext/extension-permessage-deflate.c b/thirdparty/libwebsockets/ext/extension-permessage-deflate.c
new file mode 100644
index 0000000000..e2be2ae615
--- /dev/null
+++ b/thirdparty/libwebsockets/ext/extension-permessage-deflate.c
@@ -0,0 +1,473 @@
+/*
+ * ./lib/extension-permessage-deflate.c
+ *
+ *  Copyright (C) 2016 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"
+#include "extension-permessage-deflate.h"
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+
+#define LWS_ZLIB_MEMLEVEL 8
+
+const struct lws_ext_options lws_ext_pm_deflate_options[] = {
+	/* public RFC7692 settings */
+	{ "server_no_context_takeover", EXTARG_NONE },
+	{ "client_no_context_takeover", EXTARG_NONE },
+	{ "server_max_window_bits",	EXTARG_OPT_DEC },
+	{ "client_max_window_bits",	EXTARG_OPT_DEC },
+	/* ones only user code can set */
+	{ "rx_buf_size",		EXTARG_DEC },
+	{ "tx_buf_size",		EXTARG_DEC },
+	{ "compression_level",		EXTARG_DEC },
+	{ "mem_level",			EXTARG_DEC },
+	{ NULL, 0 }, /* sentinel */
+};
+
+static void
+lws_extension_pmdeflate_restrict_args(struct lws *wsi,
+				      struct lws_ext_pm_deflate_priv *priv)
+{
+	int n, extra;
+
+	/* cap the RX buf at the nearest power of 2 to protocol rx buf */
+
+	n = wsi->context->pt_serv_buf_size;
+	if (wsi->protocol->rx_buffer_size)
+		n =  wsi->protocol->rx_buffer_size;
+
+	extra = 7;
+	while (n >= 1 << (extra + 1))
+		extra++;
+
+	if (extra < priv->args[PMD_RX_BUF_PWR2]) {
+		priv->args[PMD_RX_BUF_PWR2] = extra;
+		lwsl_info(" Capping pmd rx to %d\n", 1 << extra);
+	}
+}
+
+LWS_VISIBLE int
+lws_extension_callback_pm_deflate(struct lws_context *context,
+				  const struct lws_extension *ext,
+				  struct lws *wsi,
+				  enum lws_extension_callback_reasons reason,
+				  void *user, void *in, size_t len)
+{
+	struct lws_ext_pm_deflate_priv *priv =
+				     (struct lws_ext_pm_deflate_priv *)user;
+	struct lws_tokens *eff_buf = (struct lws_tokens *)in;
+	static unsigned char trail[] = { 0, 0, 0xff, 0xff };
+	int n, ret = 0, was_fin = 0, extra;
+	struct lws_ext_option_arg *oa;
+
+	switch (reason) {
+	case LWS_EXT_CB_NAMED_OPTION_SET:
+		oa = in;
+		if (!oa->option_name)
+			break;
+		for (n = 0; n < ARRAY_SIZE(lws_ext_pm_deflate_options); n++)
+			if (!strcmp(lws_ext_pm_deflate_options[n].name, oa->option_name))
+				break;
+
+		if (n == ARRAY_SIZE(lws_ext_pm_deflate_options))
+			break;
+		oa->option_index = n;
+
+		/* fallthru */
+
+	case LWS_EXT_CB_OPTION_SET:
+		oa = in;
+		lwsl_notice("%s: option set: idx %d, %s, len %d\n", __func__,
+			  oa->option_index, oa->start, oa->len);
+		if (oa->start)
+			priv->args[oa->option_index] = atoi(oa->start);
+		else
+			priv->args[oa->option_index] = 1;
+
+		if (priv->args[PMD_CLIENT_MAX_WINDOW_BITS] == 8)
+			priv->args[PMD_CLIENT_MAX_WINDOW_BITS] = 9;
+
+		lws_extension_pmdeflate_restrict_args(wsi, priv);
+		break;
+
+	case LWS_EXT_CB_OPTION_CONFIRM:
+		if (priv->args[PMD_SERVER_MAX_WINDOW_BITS] < 8 ||
+		    priv->args[PMD_SERVER_MAX_WINDOW_BITS] > 15 ||
+		    priv->args[PMD_CLIENT_MAX_WINDOW_BITS] < 8 ||
+		    priv->args[PMD_CLIENT_MAX_WINDOW_BITS] > 15)
+			return -1;
+		break;
+
+	case LWS_EXT_CB_CLIENT_CONSTRUCT:
+	case LWS_EXT_CB_CONSTRUCT:
+
+		n = context->pt_serv_buf_size;
+		if (wsi->protocol->rx_buffer_size)
+			n =  wsi->protocol->rx_buffer_size;
+
+		if (n < 128) {
+			lwsl_info(" permessage-deflate requires the protocol (%s) to have an RX buffer >= 128\n",
+					wsi->protocol->name);
+			return -1;
+		}
+
+		/* fill in **user */
+		priv = lws_zalloc(sizeof(*priv), "pmd priv");
+		*((void **)user) = priv;
+		lwsl_ext("%s: LWS_EXT_CB_*CONSTRUCT\n", __func__);
+		memset(priv, 0, sizeof(*priv));
+
+		/* fill in pointer to options list */
+		if (in)
+			*((const struct lws_ext_options **)in) =
+					lws_ext_pm_deflate_options;
+
+		/* fallthru */
+
+	case LWS_EXT_CB_OPTION_DEFAULT:
+
+		/* set the public, RFC7692 defaults... */
+
+		priv->args[PMD_SERVER_NO_CONTEXT_TAKEOVER] = 0,
+		priv->args[PMD_CLIENT_NO_CONTEXT_TAKEOVER] = 0;
+		priv->args[PMD_SERVER_MAX_WINDOW_BITS] = 15;
+		priv->args[PMD_CLIENT_MAX_WINDOW_BITS] = 15;
+
+		/* ...and the ones the user code can override */
+
+		priv->args[PMD_RX_BUF_PWR2] = 10; /* ie, 1024 */
+		priv->args[PMD_TX_BUF_PWR2] = 10; /* ie, 1024 */
+		priv->args[PMD_COMP_LEVEL] = 1;
+		priv->args[PMD_MEM_LEVEL] = 8;
+
+		lws_extension_pmdeflate_restrict_args(wsi, priv);
+		break;
+
+	case LWS_EXT_CB_DESTROY:
+		lwsl_ext("%s: LWS_EXT_CB_DESTROY\n", __func__);
+		lws_free(priv->buf_rx_inflated);
+		lws_free(priv->buf_tx_deflated);
+		if (priv->rx_init)
+			(void)inflateEnd(&priv->rx);
+		if (priv->tx_init)
+			(void)deflateEnd(&priv->tx);
+		lws_free(priv);
+		return ret;
+
+	case LWS_EXT_CB_PAYLOAD_RX:
+		lwsl_ext(" %s: LWS_EXT_CB_PAYLOAD_RX: in %d, existing in %d\n",
+			 __func__, eff_buf->token_len, priv->rx.avail_in);
+		if (!(wsi->u.ws.rsv_first_msg & 0x40))
+			return 0;
+
+#if 0
+		for (n = 0; n < eff_buf->token_len; n++) {
+			printf("%02X ", (unsigned char)eff_buf->token[n]);
+			if ((n & 15) == 15)
+				printf("\n");
+		}
+		printf("\n");
+#endif
+		if (!priv->rx_init)
+			if (inflateInit2(&priv->rx, -priv->args[PMD_SERVER_MAX_WINDOW_BITS]) != Z_OK) {
+				lwsl_err("%s: iniflateInit failed\n", __func__);
+				return -1;
+			}
+		priv->rx_init = 1;
+		if (!priv->buf_rx_inflated)
+			priv->buf_rx_inflated = lws_malloc(LWS_PRE + 7 + 5 +
+					    (1 << priv->args[PMD_RX_BUF_PWR2]), "pmd rx inflate buf");
+		if (!priv->buf_rx_inflated) {
+			lwsl_err("%s: OOM\n", __func__);
+			return -1;
+		}
+
+		/*
+		 * We have to leave the input stream alone if we didn't
+		 * finish with it yet.  The input stream is held in the wsi
+		 * rx buffer by the caller, so this assumption is safe while
+		 * we block new rx while draining the existing rx
+		 */
+		if (!priv->rx.avail_in && eff_buf->token && eff_buf->token_len) {
+			priv->rx.next_in = (unsigned char *)eff_buf->token;
+			priv->rx.avail_in = eff_buf->token_len;
+		}
+		priv->rx.next_out = priv->buf_rx_inflated + LWS_PRE;
+		eff_buf->token = (char *)priv->rx.next_out;
+		priv->rx.avail_out = 1 << priv->args[PMD_RX_BUF_PWR2];
+
+		if (priv->rx_held_valid) {
+			lwsl_ext("-- RX piling on held byte --\n");
+			*(priv->rx.next_out++) = priv->rx_held;
+			priv->rx.avail_out--;
+			priv->rx_held_valid = 0;
+		}
+
+		/* if...
+		 *
+		 *  - he has no remaining input content for this message, and
+		 *  - and this is the final fragment, and
+		 *  - we used everything that could be drained on the input side
+		 *
+		 * ...then put back the 00 00 FF FF the sender stripped as our
+		 * input to zlib
+		 */
+		if (!priv->rx.avail_in && wsi->u.ws.final &&
+		    !wsi->u.ws.rx_packet_length) {
+			lwsl_ext("RX APPEND_TRAILER-DO\n");
+			was_fin = 1;
+			priv->rx.next_in = trail;
+			priv->rx.avail_in = sizeof(trail);
+		}
+
+		n = inflate(&priv->rx, Z_NO_FLUSH);
+		lwsl_ext("inflate ret %d, avi %d, avo %d, wsifinal %d\n", n,
+			 priv->rx.avail_in, priv->rx.avail_out, wsi->u.ws.final);
+		switch (n) {
+		case Z_NEED_DICT:
+		case Z_STREAM_ERROR:
+		case Z_DATA_ERROR:
+		case Z_MEM_ERROR:
+			lwsl_info("zlib error inflate %d: %s\n",
+				  n, priv->rx.msg);
+			return -1;
+		}
+		/*
+		 * If we did not already send in the 00 00 FF FF, and he's
+		 * out of input, he did not EXACTLY fill the output buffer
+		 * (which is ambiguous and we will force it to go around
+		 * again by withholding a byte), and he's otherwise working on
+		 * being a FIN fragment, then do the FIN message processing
+		 * of faking up the 00 00 FF FF that the sender stripped.
+		 */
+		if (!priv->rx.avail_in && wsi->u.ws.final &&
+		    !wsi->u.ws.rx_packet_length && !was_fin &&
+		    priv->rx.avail_out /* ambiguous as to if it is the end */
+		) {
+			lwsl_ext("RX APPEND_TRAILER-DO\n");
+			was_fin = 1;
+			priv->rx.next_in = trail;
+			priv->rx.avail_in = sizeof(trail);
+			n = inflate(&priv->rx, Z_SYNC_FLUSH);
+			lwsl_ext("RX trailer inf returned %d, avi %d, avo %d\n", n,
+				 priv->rx.avail_in, priv->rx.avail_out);
+			switch (n) {
+			case Z_NEED_DICT:
+			case Z_STREAM_ERROR:
+			case Z_DATA_ERROR:
+			case Z_MEM_ERROR:
+				lwsl_info("zlib error inflate %d: %s\n",
+					  n, priv->rx.msg);
+				return -1;
+			}
+		}
+		/*
+		 * we must announce in our returncode now if there is more
+		 * output to be expected from inflate, so we can decide to
+		 * set the FIN bit on this bufferload or not.  However zlib
+		 * is ambiguous when we exactly filled the inflate buffer.  It
+		 * does not give us a clue as to whether we should understand
+		 * that to mean he ended on a buffer boundary, or if there is
+		 * more in the pipeline.
+		 *
+		 * So to work around that safely, if it used all output space
+		 * exactly, we ALWAYS say there is more coming and we withhold
+		 * the last byte of the buffer to guarantee that is true.
+		 *
+		 * That still leaves us at least one byte to finish with a FIN
+		 * on, even if actually nothing more is coming from the next
+		 * inflate action itself.
+		 */
+		if (!priv->rx.avail_out) { /* he used all available out buf */
+			lwsl_ext("-- rx grabbing held --\n");
+			/* snip the last byte and hold it for next time */
+			priv->rx_held = *(--priv->rx.next_out);
+			priv->rx_held_valid = 1;
+		}
+
+		eff_buf->token_len = (char *)priv->rx.next_out - eff_buf->token;
+		priv->count_rx_between_fin += eff_buf->token_len;
+
+		lwsl_ext("  %s: RX leaving with new effbuff len %d, "
+			 "ret %d, rx.avail_in=%d, TOTAL RX since FIN %lu\n",
+			 __func__, eff_buf->token_len, priv->rx_held_valid,
+			 priv->rx.avail_in,
+			 (unsigned long)priv->count_rx_between_fin);
+
+		if (was_fin) {
+			priv->count_rx_between_fin = 0;
+			if (priv->args[PMD_SERVER_NO_CONTEXT_TAKEOVER]) {
+				(void)inflateEnd(&priv->rx);
+				priv->rx_init = 0;
+			}
+		}
+#if 0
+		for (n = 0; n < eff_buf->token_len; n++)
+			putchar(eff_buf->token[n]);
+		puts("\n");
+#endif
+
+		return priv->rx_held_valid;
+
+	case LWS_EXT_CB_PAYLOAD_TX:
+
+		if (!priv->tx_init) {
+			n = deflateInit2(&priv->tx, priv->args[PMD_COMP_LEVEL],
+					 Z_DEFLATED,
+					 -priv->args[PMD_SERVER_MAX_WINDOW_BITS +
+						     (wsi->vhost->listen_port <= 0)],
+					 priv->args[PMD_MEM_LEVEL],
+					 Z_DEFAULT_STRATEGY);
+			if (n != Z_OK) {
+				lwsl_ext("inflateInit2 failed %d\n", n);
+				return 1;
+			}
+		}
+		priv->tx_init = 1;
+		if (!priv->buf_tx_deflated)
+			priv->buf_tx_deflated = lws_malloc(LWS_PRE + 7 + 5 +
+					    (1 << priv->args[PMD_TX_BUF_PWR2]), "pmd tx deflate buf");
+		if (!priv->buf_tx_deflated) {
+			lwsl_err("%s: OOM\n", __func__);
+			return -1;
+		}
+
+		if (eff_buf->token) {
+			lwsl_ext("%s: TX: eff_buf length %d\n", __func__,
+				 eff_buf->token_len);
+			priv->tx.next_in = (unsigned char *)eff_buf->token;
+			priv->tx.avail_in = eff_buf->token_len;
+		}
+
+#if 0
+		for (n = 0; n < eff_buf->token_len; n++) {
+			printf("%02X ", (unsigned char)eff_buf->token[n]);
+			if ((n & 15) == 15)
+				printf("\n");
+		}
+		printf("\n");
+#endif
+
+		priv->tx.next_out = priv->buf_tx_deflated + LWS_PRE + 5;
+		eff_buf->token = (char *)priv->tx.next_out;
+		priv->tx.avail_out = 1 << priv->args[PMD_TX_BUF_PWR2];
+
+		n = deflate(&priv->tx, Z_SYNC_FLUSH);
+		if (n == Z_STREAM_ERROR) {
+			lwsl_ext("%s: Z_STREAM_ERROR\n", __func__);
+			return -1;
+		}
+
+		if (priv->tx_held_valid) {
+			priv->tx_held_valid = 0;
+			if (priv->tx.avail_out == 1 << priv->args[PMD_TX_BUF_PWR2])
+				/*
+				 * we can get a situation he took something in
+				 * but did not generate anything out, at the end
+				 * of a message (eg, next thing he sends is 80
+				 * 00, a zero length FIN, like Authobahn can
+				 * send).
+				 * If we have come back as a FIN, we must not
+				 * place the pending trailer 00 00 FF FF, just
+				 * the 1 byte of live data
+				 */
+				*(--eff_buf->token) = priv->tx_held[0];
+			else {
+				/* he generated data, prepend whole pending */
+				eff_buf->token -= 5;
+				for (n = 0; n < 5; n++)
+					eff_buf->token[n] = priv->tx_held[n];
+
+			}
+		}
+		priv->compressed_out = 1;
+		eff_buf->token_len = (int)(priv->tx.next_out -
+					   (unsigned char *)eff_buf->token);
+
+		/*
+		 * we must announce in our returncode now if there is more
+		 * output to be expected from inflate, so we can decide to
+		 * set the FIN bit on this bufferload or not.  However zlib
+		 * is ambiguous when we exactly filled the inflate buffer.  It
+		 * does not give us a clue as to whether we should understand
+		 * that to mean he ended on a buffer boundary, or if there is
+		 * more in the pipeline.
+		 *
+		 * Worse, the guy providing the stuff we are sending may not
+		 * know until after that this was, actually, the last chunk,
+		 * that can happen even if we did not fill the output buf, ie
+		 * he may send after this a zero-length FIN fragment.
+		 *
+		 * This is super difficult because we must snip the last 4
+		 * bytes in the case this is the last compressed output of the
+		 * message.  The only way to deal with it is defer sending the
+		 * last 5 bytes of each frame until the next one, when we will
+		 * be in a position to understand if that has a FIN or not.
+		 */
+
+		extra = !!(len & LWS_WRITE_NO_FIN) || !priv->tx.avail_out;
+
+		if (eff_buf->token_len >= 4 + extra) {
+			lwsl_ext("tx held %d\n", 4 + extra);
+			priv->tx_held_valid = extra;
+			for (n = 3 + extra; n >= 0; n--)
+				priv->tx_held[n] = *(--priv->tx.next_out);
+			eff_buf->token_len -= 4 + extra;
+		}
+		lwsl_ext("  TX rewritten with new effbuff len %d, ret %d\n",
+			 eff_buf->token_len, !priv->tx.avail_out);
+
+		return !priv->tx.avail_out; /* 1 == have more tx pending */
+
+	case LWS_EXT_CB_PACKET_TX_PRESEND:
+		if (!priv->compressed_out)
+			break;
+		priv->compressed_out = 0;
+
+		if ((*(eff_buf->token) & 0x80) &&
+		    priv->args[PMD_CLIENT_NO_CONTEXT_TAKEOVER]) {
+			lwsl_debug("PMD_CLIENT_NO_CONTEXT_TAKEOVER\n");
+			(void)deflateEnd(&priv->tx);
+			priv->tx_init = 0;
+		}
+
+		n = *(eff_buf->token) & 15;
+		/* set RSV1, but not on CONTINUATION */
+		if (n == LWSWSOPC_TEXT_FRAME || n == LWSWSOPC_BINARY_FRAME)
+			*eff_buf->token |= 0x40;
+#if 0
+		for (n = 0; n < eff_buf->token_len; n++) {
+			printf("%02X ", (unsigned char)eff_buf->token[n]);
+			if ((n & 15) == 15)
+				puts("\n");
+		}
+		puts("\n");
+#endif
+		lwsl_ext("%s: tx opcode 0x%02X\n", __func__,
+			 (unsigned char)*eff_buf->token);
+		break;
+
+	default:
+		break;
+	}
+
+	return 0;
+}
+
diff --git a/thirdparty/libwebsockets/ext/extension-permessage-deflate.h b/thirdparty/libwebsockets/ext/extension-permessage-deflate.h
new file mode 100644
index 0000000000..8737736897
--- /dev/null
+++ b/thirdparty/libwebsockets/ext/extension-permessage-deflate.h
@@ -0,0 +1,41 @@
+
+#include <zlib.h>
+
+#define DEFLATE_FRAME_COMPRESSION_LEVEL_SERVER 1
+#define DEFLATE_FRAME_COMPRESSION_LEVEL_CLIENT Z_DEFAULT_COMPRESSION
+
+enum arg_indexes {
+	PMD_SERVER_NO_CONTEXT_TAKEOVER,
+	PMD_CLIENT_NO_CONTEXT_TAKEOVER,
+	PMD_SERVER_MAX_WINDOW_BITS,
+	PMD_CLIENT_MAX_WINDOW_BITS,
+	PMD_RX_BUF_PWR2,
+	PMD_TX_BUF_PWR2,
+	PMD_COMP_LEVEL,
+	PMD_MEM_LEVEL,
+
+	PMD_ARG_COUNT
+};
+
+struct lws_ext_pm_deflate_priv {
+	z_stream rx;
+	z_stream tx;
+
+	unsigned char *buf_rx_inflated; /* RX inflated output buffer */
+	unsigned char *buf_tx_deflated; /* TX deflated output buffer */
+
+	size_t count_rx_between_fin;
+
+	unsigned char args[PMD_ARG_COUNT];
+	unsigned char tx_held[5];
+	unsigned char rx_held;
+
+	unsigned char tx_init:1;
+	unsigned char rx_init:1;
+	unsigned char compressed_out:1;
+	unsigned char rx_held_valid:1;
+	unsigned char tx_held_valid:1;
+	unsigned char rx_append_trailer:1;
+	unsigned char pending_tx_trailer:1;
+};
+
diff --git a/thirdparty/libwebsockets/ext/extension.c b/thirdparty/libwebsockets/ext/extension.c
new file mode 100644
index 0000000000..ac28204034
--- /dev/null
+++ b/thirdparty/libwebsockets/ext/extension.c
@@ -0,0 +1,344 @@
+#include "private-libwebsockets.h"
+
+#include "extension-permessage-deflate.h"
+
+LWS_VISIBLE void
+lws_context_init_extensions(struct lws_context_creation_info *info,
+			    struct lws_context *context)
+{
+	lwsl_info(" LWS_MAX_EXTENSIONS_ACTIVE: %u\n", LWS_MAX_EXTENSIONS_ACTIVE);
+}
+
+enum lws_ext_option_parser_states {
+	LEAPS_SEEK_NAME,
+	LEAPS_EAT_NAME,
+	LEAPS_SEEK_VAL,
+	LEAPS_EAT_DEC,
+	LEAPS_SEEK_ARG_TERM
+};
+
+LWS_VISIBLE int
+lws_ext_parse_options(const struct lws_extension *ext, struct lws *wsi,
+		      void *ext_user, const struct lws_ext_options *opts,
+		      const char *in, int len)
+{
+	enum lws_ext_option_parser_states leap = LEAPS_SEEK_NAME;
+	unsigned int match_map = 0, n, m, w = 0, count_options = 0,
+		     pending_close_quote = 0;
+	struct lws_ext_option_arg oa;
+
+	oa.option_name = NULL;
+
+	while (opts[count_options].name)
+		count_options++;
+	while (len) {
+		lwsl_ext("'%c' %d", *in, leap);
+		switch (leap) {
+		case LEAPS_SEEK_NAME:
+			if (*in == ' ')
+				break;
+			if (*in == ',') {
+				len = 1;
+				break;
+			}
+			match_map = (1 << count_options) - 1;
+			leap = LEAPS_EAT_NAME;
+			w = 0;
+
+		/* fallthru */
+
+		case LEAPS_EAT_NAME:
+			oa.start = NULL;
+			oa.len = 0;
+			m = match_map;
+			n = 0;
+			pending_close_quote = 0;
+			while (m) {
+				if (m & 1) {
+					lwsl_ext("    m=%d, n=%d, w=%d\n", m, n, w);
+
+					if (*in == opts[n].name[w]) {
+						if (!opts[n].name[w + 1]) {
+							oa.option_index = n;
+							lwsl_ext("hit %d\n", oa.option_index);
+							leap = LEAPS_SEEK_VAL;
+							if (len == 1)
+								goto set_arg;
+							break;
+						}
+					} else {
+						match_map &= ~(1 << n);
+						if (!match_map) {
+							lwsl_ext("empty match map\n");
+							return -1;
+						}
+					}
+				}
+				m >>= 1;
+				n++;
+			}
+			w++;
+			break;
+		case LEAPS_SEEK_VAL:
+			if (*in == ' ')
+				break;
+			if (*in == ',') {
+				len = 1;
+				break;
+			}
+			if (*in == ';' || len == 1) { /* ie,nonoptional */
+				if (opts[oa.option_index].type == EXTARG_DEC)
+					return -1;
+				leap = LEAPS_SEEK_NAME;
+				goto set_arg;
+			}
+			if (*in == '=') {
+				w = 0;
+				pending_close_quote = 0;
+				if (opts[oa.option_index].type == EXTARG_NONE)
+					return -1;
+
+				leap = LEAPS_EAT_DEC;
+				break;
+			}
+			return -1;
+
+		case LEAPS_EAT_DEC:
+			if (*in >= '0' && *in <= '9') {
+				if (!w)
+					oa.start = in;
+				w++;
+				if (len != 1)
+					break;
+			}
+			if (!w && *in =='"') {
+				pending_close_quote = 1;
+				break;
+			}
+			if (!w)
+				return -1;
+			if (pending_close_quote && *in != '"' && len != 1)
+				return -1;
+			leap = LEAPS_SEEK_ARG_TERM;
+			if (oa.start)
+				oa.len = in - oa.start;
+			if (len == 1)
+				oa.len++;
+
+set_arg:
+			ext->callback(lws_get_context(wsi),
+				ext, wsi, LWS_EXT_CB_OPTION_SET,
+				ext_user, (char *)&oa, 0);
+			if (len == 1)
+				break;
+			if (pending_close_quote && *in == '"')
+				break;
+
+			/* fallthru */
+
+		case LEAPS_SEEK_ARG_TERM:
+			if (*in == ' ')
+				break;
+			if (*in == ';') {
+				leap = LEAPS_SEEK_NAME;
+				break;
+			}
+			if (*in == ',') {
+				len = 1;
+				break;
+			}
+			return -1;
+		}
+		len--;
+		in++;
+	}
+
+	return 0;
+}
+
+
+/* 0 = nobody had nonzero return, 1 = somebody had positive return, -1 = fail */
+
+int lws_ext_cb_active(struct lws *wsi, int reason, void *arg, int len)
+{
+	int n, m, handled = 0;
+
+	for (n = 0; n < wsi->count_act_ext; n++) {
+		m = wsi->active_extensions[n]->callback(lws_get_context(wsi),
+			wsi->active_extensions[n], wsi, reason,
+			wsi->act_ext_user[n], arg, len);
+		if (m < 0) {
+			lwsl_ext("Ext '%s' failed to handle callback %d!\n",
+				 wsi->active_extensions[n]->name, reason);
+			return -1;
+		}
+		/* valgrind... */
+		if (reason == LWS_EXT_CB_DESTROY)
+			wsi->act_ext_user[n] = NULL;
+		if (m > handled)
+			handled = m;
+	}
+
+	return handled;
+}
+
+int lws_ext_cb_all_exts(struct lws_context *context, struct lws *wsi,
+			int reason, void *arg, int len)
+{
+	int n = 0, m, handled = 0;
+	const struct lws_extension *ext;
+
+	if (!wsi || !wsi->vhost)
+		return 0;
+
+	ext = wsi->vhost->extensions;
+
+	while (ext && ext->callback && !handled) {
+		m = ext->callback(context, ext, wsi, reason,
+				  (void *)(lws_intptr_t)n, arg, len);
+		if (m < 0) {
+			lwsl_ext("Ext '%s' failed to handle callback %d!\n",
+				 wsi->active_extensions[n]->name, reason);
+			return -1;
+		}
+		if (m)
+			handled = 1;
+
+		ext++;
+		n++;
+	}
+
+	return 0;
+}
+
+int
+lws_issue_raw_ext_access(struct lws *wsi, unsigned char *buf, size_t len)
+{
+	struct lws_tokens eff_buf;
+	int ret, m, n = 0;
+
+	eff_buf.token = (char *)buf;
+	eff_buf.token_len = len;
+
+	/*
+	 * while we have original buf to spill ourselves, or extensions report
+	 * more in their pipeline
+	 */
+
+	ret = 1;
+	while (ret == 1) {
+
+		/* default to nobody has more to spill */
+
+		ret = 0;
+
+		/* show every extension the new incoming data */
+		m = lws_ext_cb_active(wsi,
+			       LWS_EXT_CB_PACKET_TX_PRESEND, &eff_buf, 0);
+		if (m < 0)
+			return -1;
+		if (m) /* handled */
+			ret = 1;
+
+		if ((char *)buf != eff_buf.token)
+			/*
+			 * extension recreated it:
+			 * need to buffer this if not all sent
+			 */
+			wsi->u.ws.clean_buffer = 0;
+
+		/* assuming they left us something to send, send it */
+
+		if (eff_buf.token_len) {
+			n = lws_issue_raw(wsi, (unsigned char *)eff_buf.token,
+							    eff_buf.token_len);
+			if (n < 0) {
+				lwsl_info("closing from ext access\n");
+				return -1;
+			}
+
+			/* always either sent it all or privately buffered */
+			if (wsi->u.ws.clean_buffer)
+				len = n;
+		}
+
+		lwsl_parser("written %d bytes to client\n", n);
+
+		/* no extension has more to spill?  Then we can go */
+
+		if (!ret)
+			break;
+
+		/* we used up what we had */
+
+		eff_buf.token = NULL;
+		eff_buf.token_len = 0;
+
+		/*
+		 * Did that leave the pipe choked?
+		 * Or we had to hold on to some of it?
+		 */
+
+		if (!lws_send_pipe_choked(wsi) && !wsi->trunc_len)
+			/* no we could add more, lets's do that */
+			continue;
+
+		lwsl_debug("choked\n");
+
+		/*
+		 * Yes, he's choked.  Don't spill the rest now get a callback
+		 * when he is ready to send and take care of it there
+		 */
+		lws_callback_on_writable(wsi);
+		wsi->extension_data_pending = 1;
+		ret = 0;
+	}
+
+	return len;
+}
+
+int
+lws_any_extension_handled(struct lws *wsi, enum lws_extension_callback_reasons r,
+			  void *v, size_t len)
+{
+	struct lws_context *context = wsi->context;
+	int n, handled = 0;
+
+	/* maybe an extension will take care of it for us */
+
+	for (n = 0; n < wsi->count_act_ext && !handled; n++) {
+		if (!wsi->active_extensions[n]->callback)
+			continue;
+
+		handled |= wsi->active_extensions[n]->callback(context,
+			wsi->active_extensions[n], wsi,
+			r, wsi->act_ext_user[n], v, len);
+	}
+
+	return handled;
+}
+
+int
+lws_set_extension_option(struct lws *wsi, const char *ext_name,
+			 const char *opt_name, const char *opt_val)
+{
+	struct lws_ext_option_arg oa;
+	int idx = 0;
+
+	/* first identify if the ext is active on this wsi */
+	while (idx < wsi->count_act_ext &&
+	       strcmp(wsi->active_extensions[idx]->name, ext_name))
+		idx++;
+
+	if (idx == wsi->count_act_ext)
+		return -1; /* request ext not active on this wsi */
+
+	oa.option_name = opt_name;
+	oa.option_index = 0;
+	oa.start = opt_val;
+	oa.len = 0;
+
+	return wsi->active_extensions[idx]->callback(
+			wsi->context, wsi->active_extensions[idx], wsi,
+			LWS_EXT_CB_NAMED_OPTION_SET, wsi->act_ext_user[idx], &oa, 0);
+}