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-rw-r--r--modules/websocket/lws_helper.cpp157
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diff --git a/modules/websocket/lws_helper.cpp b/modules/websocket/lws_helper.cpp
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+/*************************************************************************/
+/* lws_helper.cpp */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */
+/* */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the */
+/* "Software"), to deal in the Software without restriction, including */
+/* without limitation the rights to use, copy, modify, merge, publish, */
+/* distribute, sublicense, and/or sell copies of the Software, and to */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions: */
+/* */
+/* The above copyright notice and this permission notice shall be */
+/* included in all copies or substantial portions of the Software. */
+/* */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
+/*************************************************************************/
+
+#if !defined(JAVASCRIPT_ENABLED)
+
+#include "lws_helper.h"
+
+_LWSRef *_lws_create_ref(void *obj) {
+
+ _LWSRef *out = (_LWSRef *)memalloc(sizeof(_LWSRef));
+ out->is_destroying = false;
+ out->free_context = false;
+ out->is_polling = false;
+ out->obj = obj;
+ out->is_valid = true;
+ out->lws_structs = NULL;
+ out->lws_names = NULL;
+ return out;
+}
+
+void _lws_free_ref(_LWSRef *ref) {
+ // Free strings and structs
+ memfree(ref->lws_structs);
+ memfree(ref->lws_names);
+ // Free ref
+ memfree(ref);
+}
+
+bool _lws_destroy(struct lws_context *context, _LWSRef *ref) {
+ if (context == NULL || ref->is_destroying)
+ return false;
+
+ if (ref->is_polling) {
+ ref->free_context = true;
+ return false;
+ }
+
+ ref->is_destroying = true;
+ lws_context_destroy(context);
+ _lws_free_ref(ref);
+ return true;
+}
+
+bool _lws_poll(struct lws_context *context, _LWSRef *ref) {
+
+ ERR_FAIL_COND_V(context == NULL, false);
+ ERR_FAIL_COND_V(ref == NULL, false);
+
+ ref->is_polling = true;
+ lws_service(context, 0);
+ ref->is_polling = false;
+
+ if (!ref->free_context)
+ return false; // Nothing to do
+
+ bool is_valid = ref->is_valid; // Might have been destroyed by poll
+
+ _lws_destroy(context, ref); // Will destroy context and ref
+
+ return is_valid; // If the object should NULL its context and ref
+}
+
+/*
+ * Prepare the protocol_structs to be fed to context.
+ * Also prepare the protocol string used by the client.
+ */
+void _lws_make_protocols(void *p_obj, lws_callback_function *p_callback, PoolVector<String> p_names, _LWSRef **r_lws_ref) {
+ // The input strings might go away after this call, we need to copy them.
+ // We will clear them when destroying the context.
+ int i;
+ int len = p_names.size();
+ size_t data_size = sizeof(struct LWSPeer::PeerData);
+ PoolVector<String>::Read pnr = p_names.read();
+
+ // This is a reference connecting the object with lws keep track of status, mallocs, etc.
+ // Must survive as long the context.
+ // Must be freed manually when context creation fails.
+ _LWSRef *ref = _lws_create_ref(p_obj);
+
+ // LWS protocol structs.
+ ref->lws_structs = (struct lws_protocols *)memalloc(sizeof(struct lws_protocols) * (len + 2));
+ memset(ref->lws_structs, 0, sizeof(struct lws_protocols) * (len + 2));
+
+ CharString strings = p_names.join(",").ascii();
+ int str_len = strings.length();
+
+ // Joined string of protocols, double the size: comma separated first, NULL separated last
+ ref->lws_names = (char *)memalloc((str_len + 1) * 2); // Plus the terminator
+
+ char *names_ptr = ref->lws_names;
+ struct lws_protocols *structs_ptr = ref->lws_structs;
+
+ // Comma separated protocols string to be used in client Sec-WebSocket-Protocol header
+ if (str_len > 0)
+ copymem(names_ptr, strings.get_data(), str_len);
+ names_ptr[str_len] = '\0'; // NULL terminator
+
+ // NULL terminated protocol strings to be used in protocol structs
+ if (str_len > 0)
+ copymem(&names_ptr[str_len + 1], strings.get_data(), str_len);
+ names_ptr[(str_len * 2) + 1] = '\0'; // NULL terminator
+ int pos = str_len + 1;
+
+ // The first protocol is the default for any http request (before upgrade).
+ // It is also used as the websocket protocol when no subprotocol is specified.
+ structs_ptr[0].name = "default";
+ structs_ptr[0].callback = p_callback;
+ structs_ptr[0].per_session_data_size = data_size;
+ structs_ptr[0].rx_buffer_size = LWS_BUF_SIZE;
+ structs_ptr[0].tx_packet_size = LWS_PACKET_SIZE;
+ // Add user defined protocols
+ for (i = 0; i < len; i++) {
+ structs_ptr[i + 1].name = (const char *)&names_ptr[pos];
+ structs_ptr[i + 1].callback = p_callback;
+ structs_ptr[i + 1].per_session_data_size = data_size;
+ structs_ptr[i + 1].rx_buffer_size = LWS_BUF_SIZE;
+ structs_ptr[i + 1].tx_packet_size = LWS_PACKET_SIZE;
+ pos += pnr[i].ascii().length() + 1;
+ names_ptr[pos - 1] = '\0';
+ }
+ // Add protocols terminator
+ structs_ptr[len + 1].name = NULL;
+ structs_ptr[len + 1].callback = NULL;
+ structs_ptr[len + 1].per_session_data_size = 0;
+ structs_ptr[len + 1].rx_buffer_size = 0;
+
+ *r_lws_ref = ref;
+}
+
+#endif