mirror of
https://github.com/espressif/openthread.git
synced 2026-10-18 13:38:07 +00:00
Jonathan Hui
27321a2110
This commit adds support for building the Nexus simulator for WebAssembly (WASM) using the Emscripten toolchain. This enables the simulator to run in a web browser environment with a JavaScript-based control interface and visualization. Key implementation details: - Introduced `nexus_wasm.cpp` which defines Emscripten bindings (using Embind) for core simulation controls, including stepping time, node creation, topology orchestration, and state manipulation. - Implemented a `WasmObserver` and a global event queue to capture simulation events (node state changes, link updates, packet events) and expose them to JavaScript via a polling mechanism (`pollEvent`). - Updated the CMake build system to support the `EMSCRIPTEN` platform, configuring specific linker options for ES6 module export, modularization, and memory growth. - Enhanced `build.sh` to allow targeting WASM via `emcmake`. - Guarded file-system-dependent operations in `nexus_pcap.cpp` and adjusted `nexus_core.cpp` to handle WASM-specific constraints where standard I/O or multiple observers might not be applicable. - Added `test_wasm_bindings.mjs`, a Node.js-based smoke test that verifies the integrity of the WASM bindings and event pipeline. - Integrated `nexus-wasm-tests` into the GitHub Actions workflow to ensure continuous verification of the WASM build and functionality.
114 lines
4.1 KiB
C++
114 lines
4.1 KiB
C++
/*
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* Copyright (c) 2026, The OpenThread Authors.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef OT_NEXUS_PLATFORM_NEXUS_PCAP_HPP_
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#define OT_NEXUS_PLATFORM_NEXUS_PCAP_HPP_
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#include <cstdint>
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#include <cstdio>
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#include "nexus_infra_if.hpp"
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#include "nexus_radio.hpp"
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namespace ot {
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namespace Nexus {
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class Pcap
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{
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public:
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Pcap(void);
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~Pcap(void);
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/**
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* Opens a pcapng file.
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*
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* @param[in] aFilename The filename to open.
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*/
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void Open(const char *aFilename);
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/**
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* Closes the pcapng file.
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*/
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void Close(void);
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/**
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* Writes a frame to the pcapng file.
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*
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* @param[in] aFrame The frame to write.
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* @param[in] aTimeUs The timestamp in microseconds.
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*/
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void WriteFrame(const otRadioFrame &aFrame, uint64_t aTimeUs);
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/**
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* Writes a packet to the pcapng file.
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*
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* @param[in] aSrcAddr The source link-layer address.
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* @param[in] aDstAddr The destination link-layer address.
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* @param[in] aBuffer The packet buffer to write.
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* @param[in] aLength The packet length.
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* @param[in] aTimeUs The timestamp in microseconds.
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*/
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void WritePacket(const InfraIf::LinkLayerAddress &aSrcAddr,
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const InfraIf::LinkLayerAddress &aDstAddr,
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const uint8_t *aBuffer,
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uint16_t aLength,
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uint64_t aTimeUs);
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private:
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static constexpr uint32_t kPcapngShbType = 0x0a0d0d0a;
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static constexpr uint32_t kPcapngByteOrderMagic = 0x1a2b3c4d;
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static constexpr uint16_t kPcapngVersionMajor = 1;
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static constexpr uint16_t kPcapngVersionMinor = 0;
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static constexpr uint32_t kPcapngIdbType = 0x00000001;
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static constexpr uint32_t kPcapngEpbType = 0x00000006;
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static constexpr uint32_t kPcapngSnapLen = 65535;
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static constexpr uint32_t kPcapngLinkTypeIeee802154 = 283; // DLT_IEEE802_15_4_TAP
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static constexpr uint32_t kPcapngLinkTypeEthernet = 1; // LINKTYPE_ETHERNET
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static constexpr uint16_t kEtherTypeIPv6 = 0x86dd;
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static constexpr uint8_t kTapVersion = 0;
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static constexpr uint16_t kTapFcsType = 0;
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static constexpr uint16_t kTapFcsLength = 1;
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static constexpr uint8_t kTapFcsValue = 1; // 16-bit CRC
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static constexpr uint16_t kTapChannelType = 3;
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static constexpr uint16_t kTapChannelLength = 3;
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static constexpr uint8_t kTapChannelPage = 0;
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#ifndef __EMSCRIPTEN__
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FILE *mFile;
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#endif
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};
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} // namespace Nexus
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} // namespace ot
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#endif // OT_NEXUS_PLATFORM_NEXUS_PCAP_HPP_
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