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-rw-r--r--modules/websocket/lws_helper.h221
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diff --git a/modules/websocket/lws_helper.h b/modules/websocket/lws_helper.h
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--- a/modules/websocket/lws_helper.h
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-/*************************************************************************/
-/* lws_helper.h */
-/*************************************************************************/
-/* 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. */
-/*************************************************************************/
-#ifndef LWS_HELPER_H
-#define LWS_HELPER_H
-
-#define LWS_BUF_SIZE 65536
-#define LWS_PACKET_SIZE LWS_BUF_SIZE
-
-#include "core/io/stream_peer.h"
-#include "core/os/os.h"
-#include "core/reference.h"
-#include "core/ring_buffer.h"
-#include "lws_peer.h"
-
-struct _LWSRef {
- bool free_context;
- bool is_polling;
- bool is_valid;
- bool is_destroying;
- void *obj;
- struct lws_protocols *lws_structs;
- char *lws_names;
-};
-
-static _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;
-}
-
-static void _lws_free_ref(_LWSRef *ref) {
- // Free strings and structs
- memfree(ref->lws_structs);
- memfree(ref->lws_names);
- // Free ref
- memfree(ref);
-}
-
-static 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;
-}
-
-static 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.
- */
-static 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;
-}
-
-/* clang-format off */
-#define LWS_HELPER(CNAME) \
-protected: \
- struct _LWSRef *_lws_ref; \
- struct lws_context *context; \
- \
- static int _lws_gd_callback(struct lws *wsi, enum lws_callback_reasons reason, void *user, void *in, size_t len) { \
- \
- if (wsi == NULL) { \
- return 0; \
- } \
- \
- struct _LWSRef *ref = (struct _LWSRef *)lws_context_user(lws_get_context(wsi)); \
- if (!ref->is_valid) \
- return 0; \
- CNAME *helper = (CNAME *)ref->obj; \
- return helper->_handle_cb(wsi, reason, user, in, len); \
- } \
- \
- void invalidate_lws_ref() { \
- if (_lws_ref != NULL) \
- _lws_ref->is_valid = false; \
- } \
- \
- void destroy_context() { \
- if (_lws_destroy(context, _lws_ref)) { \
- context = NULL; \
- _lws_ref = NULL; \
- } \
- } \
- \
-public: \
- virtual int _handle_cb(struct lws *wsi, enum lws_callback_reasons reason, void *user, void *in, size_t len); \
- \
- void _lws_poll() { \
- ERR_FAIL_COND(context == NULL); \
- \
- if (::_lws_poll(context, _lws_ref)) { \
- context = NULL; \
- _lws_ref = NULL; \
- } \
- } \
- \
-protected:
-
-/* clang-format on */
-
-#endif // LWS_HELPER_H
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