Add WASM parser and Vue dissector UI.

Ship a working HexPigeon: typed binary parsing in Rust/WASM, a three-pane frontend, and unit tests covering the field types.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
2026-09-03 16:26:52 +00:00
co-authored by Cursor
parent f4b19e87b1
commit 71974f5107
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target/
frontend/node_modules/
frontend/dist/
frontend/src/wasm/
.cursor/
.DS_Store
*.local
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.PHONY: wasm frontend dev build test clean
wasm:
cd parser-wasm && wasm-pack build --target web --out-dir ../frontend/src/wasm
frontend:
cd frontend && npm install
dev: wasm frontend
cd frontend && npm run dev
build: wasm
cd frontend && npm run build
test:
cd parser-wasm && cargo test
cd frontend && npm install && npm test
clean:
rm -rf frontend/src/wasm frontend/dist parser-wasm/target
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# HexPigeon # HexPigeon
Paste a hex dump, describe the layout in JSON or YAML, get a field tree and a highlighted hex view.
The parser is Rust compiled to WASM. The UI is Vue 3.
## Layout
```
parser-wasm/ binary types, endianness, bitflags, strings, CRC
frontend/ schema editor, hex view, parsed tree
```
Field types: `uint8/16/32/64`, `int8/16/32`, `float32/64`, `bitflags8/16`, `bytes`, `string_fixed`, `string_lp8`, `string_lp16`, `crc16`, `crc32`, `repeated`, `padding`.
## Run
Needs `wasm-pack`, a Rust toolchain with `wasm32-unknown-unknown`, and Node 22.
```bash
nix-shell # optional
make test
make dev
```
`make dev` builds the WASM module, installs frontend deps, and starts Vite on http://localhost:5173.
## Schema
```json
{
"name": "Example Frame",
"endian": "big",
"fields": [
{ "name": "magic", "type": "uint8" },
{ "name": "len", "type": "uint8" },
{ "name": "payload", "type": "string_fixed", "length": 5 },
{ "name": "checksum", "type": "crc32", "checksum_range": [0, 11] }
]
}
```
Hex input is whitespace-insensitive. Hovering a field highlights its bytes; CRC fields report valid/invalid when `checksum_range` is set.
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>HexPigeon — Binary Protocol Dissector</title>
<link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'><rect width='32' height='32' fill='%23161b22'/><text x='16' y='22' text-anchor='middle' font-family='monospace' font-size='14' fill='%2358a6ff'>HP</text></svg>" />
</head>
<body>
<div id="app"></div>
<script type="module" src="/src/main.ts"></script>
</body>
</html>
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{
"name": "hex-pigeon-frontend",
"version": "0.1.0",
"private": true,
"scripts": {
"dev": "vite",
"build": "vue-tsc --noEmit && vite build",
"preview": "vite preview",
"test": "vitest run",
"test:watch": "vitest",
"build:wasm": "cd ../parser-wasm && wasm-pack build --target web --out-dir ../frontend/src/wasm"
},
"dependencies": {
"vue": "^3.4.0",
"pinia": "^2.1.7",
"@codemirror/view": "^6.26.3",
"@codemirror/state": "^6.4.1",
"@codemirror/lang-json": "^6.0.1",
"@codemirror/theme-one-dark": "^6.1.2",
"js-yaml": "^4.1.0"
},
"devDependencies": {
"@vitejs/plugin-vue": "^5.0.4",
"typescript": "^5.4.5",
"vite": "^5.2.11",
"vitest": "^2.1.8",
"vue-tsc": "^2.0.13",
"vite-plugin-wasm": "^3.3.0",
"vite-plugin-top-level-await": "^1.4.4"
}
}
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<template>
<div class="app">
<header class="app-header">
<div class="brand">
<span class="logo">HexPigeon</span>
<span class="subtitle">Binary Protocol Dissector</span>
</div>
<div class="header-actions">
<button class="btn btn-primary" @click="store.runParse()" :disabled="!store.wasmReady">
{{ store.wasmReady ? 'Parse' : 'Loading engine...' }}
</button>
</div>
</header>
<div v-if="store.wasmError" class="banner banner-error">
{{ store.wasmError }}
<small>Run <code>make wasm</code> then <code>make dev</code>.</small>
</div>
<main class="panels">
<aside class="panel panel-schema">
<PanelHeader title="Schema">
<select v-model="store.schemaFormat" class="format-select" aria-label="Schema format">
<option value="json">JSON</option>
<option value="yaml">YAML</option>
</select>
</PanelHeader>
<SchemaEditor />
</aside>
<section class="panel panel-hex">
<PanelHeader title="Hex View">
<span class="byte-count">{{ store.bytes.length }} bytes</span>
</PanelHeader>
<HexInput />
<HexViewer />
</section>
<aside class="panel panel-tree">
<PanelHeader title="Parsed Fields">
<span v-if="store.parseResult" class="byte-count">
{{ store.parseResult.consumed_bytes }}/{{ store.parseResult.total_bytes }} B
</span>
</PanelHeader>
<div v-if="store.parseError" class="parse-error">
Error: {{ store.parseError }}
</div>
<ParsedTree v-if="store.parseResult" :fields="store.parseResult.fields" />
<div v-else-if="!store.parseError" class="empty-hint">
Define a schema and hex dump, then select <strong>Parse</strong>.
</div>
</aside>
</main>
</div>
</template>
<script setup lang="ts">
import { onMounted } from 'vue'
import { useParserStore } from '@/stores/parser'
import PanelHeader from '@/components/PanelHeader.vue'
import SchemaEditor from '@/components/SchemaEditor.vue'
import HexInput from '@/components/HexInput.vue'
import HexViewer from '@/components/HexViewer.vue'
import ParsedTree from '@/components/ParsedTree.vue'
const store = useParserStore()
onMounted(async () => {
await store.initWasm()
store.runParse()
})
</script>
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<template>
<div class="hex-input-wrapper">
<textarea
v-model="store.hexInput"
class="hex-input"
spellcheck="false"
placeholder="Paste hex dump here…"
rows="4"
/>
</div>
</template>
<script setup lang="ts">
import { useParserStore } from '@/stores/parser'
const store = useParserStore()
</script>
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<template>
<div class="hex-viewer" ref="viewerEl">
<div class="hex-grid">
<!-- Row labels + hex + ascii -->
<template v-for="(row, ri) in rows" :key="ri">
<!-- Offset -->
<span class="hex-offset">{{ row.offset.toString(16).padStart(4, '0') }}</span>
<!-- Hex bytes -->
<span class="hex-bytes">
<span
v-for="(byte, ci) in row.bytes"
:key="ci"
class="hex-byte"
:class="byteClass(row.offset + ci)"
@mouseenter="onHoverByte(row.offset + ci)"
@mouseleave="onLeave"
@click="onClickByte(row.offset + ci)"
>{{ byte.toString(16).padStart(2, '0') }}</span>
<!-- Padding for last row -->
<span
v-for="p in (16 - row.bytes.length)"
:key="'p' + p"
class="hex-byte hex-pad"
> </span>
</span>
<!-- ASCII -->
<span class="hex-ascii">
<span
v-for="(byte, ci) in row.bytes"
:key="ci"
class="ascii-char"
:class="byteClass(row.offset + ci)"
@mouseenter="onHoverByte(row.offset + ci)"
@mouseleave="onLeave"
>{{ toAscii(byte) }}</span>
</span>
</template>
</div>
<!-- Legend -->
<div v-if="store.selectedField" class="hex-legend">
<span class="legend-dot selected" /> Selected:
<strong>{{ store.selectedField.name }}</strong>
offset {{ store.selectedField.offset }}, {{ store.selectedField.size }}B
</div>
</div>
</template>
<script setup lang="ts">
import { computed, ref } from 'vue'
import { useParserStore } from '@/stores/parser'
import type { ParsedField } from '@/types/parser'
const store = useParserStore()
const viewerEl = ref<HTMLElement | null>(null)
const BYTES_PER_ROW = 16
interface Row { offset: number; bytes: number[] }
const rows = computed<Row[]>(() => {
const bs = store.bytes
const out: Row[] = []
for (let i = 0; i < bs.length; i += BYTES_PER_ROW) {
out.push({ offset: i, bytes: bs.slice(i, i + BYTES_PER_ROW) })
}
return out
})
/** Flatten all fields (incl. children) for range lookups */
const allFields = computed<ParsedField[]>(() => {
if (!store.parseResult) return []
return flatten(store.parseResult.fields)
})
function flatten(fields: ParsedField[]): ParsedField[] {
return fields.flatMap(f => [f, ...(f.children ? flatten(f.children) : [])])
}
/** Return the field containing byte index `i` */
function fieldAt(i: number): ParsedField | undefined {
return allFields.value.find(f => i >= f.offset && i < f.offset + f.size)
}
function byteClass(i: number) {
const hovered = store.hoveredRange
const selected = store.selectedField
const classes: string[] = []
if (selected && i >= selected.offset && i < selected.offset + selected.size) {
classes.push('byte-selected')
}
if (hovered && i >= hovered[0] && i < hovered[1]) {
classes.push('byte-hovered')
}
const field = fieldAt(i)
if (field) {
classes.push('byte-parsed')
if (field.checksum_valid === false) classes.push('byte-error')
else if (field.checksum_valid === true) classes.push('byte-ok')
}
return classes
}
function onHoverByte(i: number) {
const f = fieldAt(i)
if (f) store.setHovered([f.offset, f.offset + f.size])
else store.setHovered(null)
}
function onLeave() {
store.setHovered(null)
}
function onClickByte(i: number) {
const f = fieldAt(i)
store.setSelected(f ?? null)
}
function toAscii(b: number): string {
if (b >= 0x20 && b < 0x7f) return String.fromCharCode(b)
return '·'
}
</script>
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<template>
<div class="panel-header">
<span class="panel-title">{{ title }}</span>
<slot />
</div>
</template>
<script setup lang="ts">
defineProps<{ title: string }>()
</script>
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<template>
<div
class="parsed-node"
:class="{
'node-selected': isSelected,
'node-hovered': isHovered,
'node-error': field.checksum_valid === false,
'node-ok': field.checksum_valid === true,
}"
:style="{ paddingLeft: depth * 16 + 8 + 'px' }"
@mouseenter="onHover"
@mouseleave="onLeave"
@click.stop="onClick"
>
<button
v-if="hasChildren"
class="expand-btn"
:aria-expanded="expanded"
@click.stop="expanded = !expanded"
>
<span class="expand-icon" :class="{ expanded }" />
</button>
<span v-else class="expand-spacer" />
<span class="node-kind">{{ kindLabel }}</span>
<span class="node-name">{{ field.name }}</span>
<span class="node-value">
<template v-if="Array.isArray(field.value)">
<template v-if="isFlagArray(field.value)">
<span
v-for="flag in (field.value as FlagValue[])"
:key="flag.bit"
class="flag-chip"
:class="flag.set ? 'flag-set' : 'flag-unset'"
>{{ flag.name }}</span>
</template>
<template v-else>
<span class="bytes-preview">
{{ (field.value as number[]).map(b => b.toString(16).padStart(2, '0')).join(' ') }}
</span>
</template>
</template>
<template v-else-if="field.value !== null">
<span :class="valueClass">{{ displayValue }}</span>
</template>
</span>
<span class="node-meta">+{{ field.offset }} / {{ field.size }}B</span>
<span v-if="field.checksum_valid === true" class="badge badge-ok">VALID</span>
<span v-else-if="field.checksum_valid === false" class="badge badge-err">INVALID</span>
</div>
<div v-if="field.description && isSelected" class="node-desc" :style="{ paddingLeft: depth * 16 + 36 + 'px' }">
{{ field.description }}
</div>
<template v-if="hasChildren && expanded">
<ParsedNode
v-for="child in field.children"
:key="child.name + child.offset"
:field="child"
:depth="depth + 1"
/>
</template>
</template>
<script setup lang="ts">
import { ref, computed } from 'vue'
import { useParserStore } from '@/stores/parser'
import type { ParsedField, FlagValue } from '@/types/parser'
const props = defineProps<{ field: ParsedField; depth: number }>()
const store = useParserStore()
const expanded = ref(true)
const hasChildren = computed(() => !!props.field.children?.length)
const isSelected = computed(() =>
store.selectedField?.offset === props.field.offset &&
store.selectedField?.name === props.field.name
)
const isHovered = computed(() => {
const h = store.hoveredRange
if (!h) return false
return props.field.offset >= h[0] && props.field.offset < h[1]
})
const kindLabel = computed(() =>
props.field.kind.replace(/([A-Z])/g, ' $1').trim()
)
const displayValue = computed(() => {
const v = props.field.value
if (typeof v === 'number') {
if (props.field.kind.toLowerCase().includes('float')) return v.toFixed(6)
return `${v} (0x${v.toString(16).toUpperCase()})`
}
return String(v)
})
const valueClass = computed(() => {
const k = props.field.kind.toLowerCase()
if (k.includes('uint') || k.includes('int')) return 'val-int'
if (k.includes('float')) return 'val-float'
if (k.includes('string')) return 'val-string'
if (k.includes('crc')) return 'val-crc'
return ''
})
function isFlagArray(v: unknown[]): v is FlagValue[] {
return v.length > 0 && typeof (v[0] as FlagValue).bit === 'number'
}
function onHover() {
store.setHovered([props.field.offset, props.field.offset + props.field.size])
}
function onLeave() {
store.setHovered(null)
}
function onClick() {
store.setSelected(isSelected.value ? null : props.field)
}
</script>
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<template>
<div class="parsed-tree">
<ParsedNode
v-for="field in fields"
:key="field.name + field.offset"
:field="field"
:depth="0"
/>
</div>
</template>
<script setup lang="ts">
import type { ParsedField } from '@/types/parser'
import ParsedNode from './ParsedNode.vue'
defineProps<{ fields: ParsedField[] }>()
</script>
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<template>
<div class="schema-editor">
<textarea
v-model="store.schemaText"
class="schema-textarea"
spellcheck="false"
autocomplete="off"
@keydown.tab.prevent="onTab"
@input="onInput"
/>
<div v-if="schemaError" class="schema-error">Error: {{ schemaError }}</div>
</div>
</template>
<script setup lang="ts">
import { ref, watch } from 'vue'
import { useParserStore } from '@/stores/parser'
import { validateJsonSchema } from '@/utils/schema'
const store = useParserStore()
const schemaError = ref<string | null>(null)
function validate() {
if (store.schemaFormat === 'json') {
schemaError.value = validateJsonSchema(store.schemaText)
} else {
schemaError.value = null
}
}
function onInput() {
validate()
}
function onTab(e: KeyboardEvent) {
const el = e.target as HTMLTextAreaElement
const start = el.selectionStart
const end = el.selectionEnd
store.schemaText =
store.schemaText.substring(0, start) + ' ' + store.schemaText.substring(end)
// Move cursor
setTimeout(() => {
el.selectionStart = el.selectionEnd = start + 2
})
}
watch(() => store.schemaFormat, validate)
</script>
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{
"name": "Example Frame",
"endian": "big",
"fields": [
{
"name": "magic",
"type": "uint8",
"description": "Protocol magic byte (0xFF)"
},
{
"name": "payload_len",
"type": "uint8",
"description": "Length of payload string"
},
{
"name": "payload",
"type": "string_fixed",
"length": 5,
"description": "Fixed-length ASCII payload"
},
{
"name": "raw_data",
"type": "bytes",
"length": 4,
"description": "Raw 4-byte data blob"
},
{
"name": "tag",
"type": "string_fixed",
"length": 4,
"description": "ASCII tag (ABCD)"
},
{
"name": "checksum",
"type": "crc32",
"checksum_range": [0, 11],
"description": "CRC-32 over bytes 0-10"
},
{
"name": "flags",
"type": "bitflags16",
"description": "Status flags",
"flags": [
{ "bit": 0, "name": "ACK", "description": "Acknowledge" },
{ "bit": 1, "name": "SYN", "description": "Synchronise" },
{ "bit": 2, "name": "FIN", "description": "Finished" },
{ "bit": 7, "name": "ERR", "description": "Error" }
]
}
]
}
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export const EXAMPLE_SCHEMA = JSON.stringify(
{
name: 'Example Frame',
endian: 'big',
fields: [
{
name: 'magic',
type: 'uint8',
description: 'Protocol magic byte (0xFF)',
},
{
name: 'payload_len',
type: 'uint8',
description: 'Length of payload string',
},
{
name: 'payload',
type: 'string_fixed',
length: 5,
description: 'Fixed-length ASCII payload',
},
{
name: 'raw_data',
type: 'bytes',
length: 4,
description: 'Raw 4-byte data blob',
},
{
name: 'tag',
type: 'string_fixed',
length: 4,
description: 'ASCII tag (ABCD)',
},
{
name: 'checksum',
type: 'crc32',
checksum_range: [0, 11],
description: 'CRC-32 over bytes 0-10',
},
{
name: 'flags',
type: 'bitflags16',
description: 'Status flags',
flags: [
{ bit: 0, name: 'ACK', description: 'Acknowledge' },
{ bit: 1, name: 'SYN', description: 'Synchronise' },
{ bit: 2, name: 'FIN', description: 'Finished' },
{ bit: 7, name: 'ERR', description: 'Error' },
],
},
],
},
null,
2,
)
/** Example frame with valid CRC-32 (ISO HDLC) over bytes 0-10 and flags ACK|SYN. */
export const EXAMPLE_HEX = [
'FF 05 48 65 6C 6C 6F',
'00 01 02 03',
'41 42 43 44',
'E8 6B B6 E1',
'00 03',
].join('\n')
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import { createApp } from 'vue'
import { createPinia } from 'pinia'
import App from './App.vue'
import './styles/main.css'
const app = createApp(App)
app.use(createPinia())
app.mount('#app')
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import { beforeEach, describe, expect, it, vi } from 'vitest'
import { createPinia, setActivePinia } from 'pinia'
import { useParserStore } from '@/stores/parser'
import { EXAMPLE_HEX } from '@/fixtures/example'
import type { ParseResult } from '@/types/parser'
describe('useParserStore', () => {
beforeEach(() => {
setActivePinia(createPinia())
})
it('derives bytes from hex input', () => {
const store = useParserStore()
store.hexInput = 'FF 00 AB'
expect(store.bytes).toEqual([0xFF, 0x00, 0xAB])
})
it('loads example fixture with valid byte length', () => {
const store = useParserStore()
store.hexInput = EXAMPLE_HEX
expect(store.bytes.length).toBe(21)
})
it('reports parse error when WASM is unavailable', () => {
const store = useParserStore()
store.runParse()
expect(store.parseError).toBe('WASM module not ready.')
})
it('stores parse result from WASM module', () => {
const store = useParserStore()
const result: ParseResult = {
fields: [],
total_bytes: 4,
consumed_bytes: 4,
}
store.wasmReady = true
store.wasm = {
parse: vi.fn().mockReturnValue(result),
hex_to_bytes_js: vi.fn(),
}
store.runParse()
expect(store.parseResult).toEqual(result)
expect(store.parseError).toBeNull()
})
it('captures invalid JSON schema errors', () => {
const store = useParserStore()
store.wasmReady = true
store.wasm = {
parse: vi.fn(),
hex_to_bytes_js: vi.fn(),
}
store.schemaText = '{bad json'
store.runParse()
expect(store.parseError).toMatch(/JSON schema error/)
expect(store.parseResult).toBeNull()
})
})
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import { defineStore } from 'pinia'
import { ref, computed, shallowRef } from 'vue'
import type { ParseResult, ParsedField } from '@/types/parser'
import { parseHexInput } from '@/utils/hex'
import { validateJsonSchema } from '@/utils/schema'
import { EXAMPLE_HEX, EXAMPLE_SCHEMA } from '@/fixtures/example'
interface WasmModule {
parse: (hex: string, schema: string) => ParseResult
hex_to_bytes_js: (hex: string) => Uint8Array
}
export const useParserStore = defineStore('parser', () => {
// ── State ──────────────────────────────────────────────────────────────
const wasm = shallowRef<WasmModule | null>(null)
const wasmReady = ref(false)
const wasmError = ref<string | null>(null)
const hexInput = ref<string>(EXAMPLE_HEX)
const schemaText = ref<string>(EXAMPLE_SCHEMA)
const schemaFormat = ref<'json' | 'yaml'>('json')
const parseResult = ref<ParseResult | null>(null)
const parseError = ref<string | null>(null)
// Highlighted byte range [start, end) for hover sync.
const hoveredRange = ref<[number, number] | null>(null)
// Clicked / selected field for persistent highlight.
const selectedField = ref<ParsedField | null>(null)
// ── WASM init ──────────────────────────────────────────────────────────
async function initWasm() {
try {
// Dynamic import — wasm-pack output directory resolved at build time.
const mod = await import('../wasm/hex_pigeon_parser.js')
await mod.default() // run wasm-bindgen init
wasm.value = mod as unknown as WasmModule
wasmReady.value = true
} catch (e) {
wasmError.value = `Failed to load WASM: ${e}`
}
}
// ── Actions ────────────────────────────────────────────────────────────
function runParse() {
parseError.value = null
parseResult.value = null
if (!wasmReady.value || !wasm.value) {
parseError.value = 'WASM module not ready.'
return
}
let schemaJson = schemaText.value
if (schemaFormat.value === 'yaml') {
try {
// @ts-ignore dynamic import resolved at runtime
const yaml = (window as any).__yaml
schemaJson = JSON.stringify(yaml.load(schemaText.value))
} catch (e) {
parseError.value = `YAML parse error: ${e}`
return
}
} else {
const err = validateJsonSchema(schemaJson)
if (err) {
parseError.value = `JSON schema error: ${err}`
return
}
}
try {
const result = wasm.value.parse(hexInput.value, schemaJson)
parseResult.value = result
} catch (e) {
parseError.value = String(e)
}
}
const bytes = computed<number[]>(() => parseHexInput(hexInput.value))
function setHovered(range: [number, number] | null) {
hoveredRange.value = range
}
function setSelected(field: ParsedField | null) {
selectedField.value = field
}
return {
wasm, wasmReady, wasmError,
hexInput, schemaText, schemaFormat,
parseResult, parseError,
hoveredRange, selectedField,
bytes,
initWasm, runParse, setHovered, setSelected,
}
})
export { EXAMPLE_HEX, EXAMPLE_SCHEMA }
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/* ── Reset & tokens ────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
--bg0: #0d1117;
--bg1: #161b22;
--bg2: #21262d;
--bg3: #30363d;
--border: #30363d;
--text: #e6edf3;
--text-muted: #7d8590;
--accent: #58a6ff;
--accent2: #3fb950;
--warn: #f85149;
--yellow: #e3b341;
--purple: #bc8cff;
--orange: #ffa657;
--font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
--font-ui: system-ui, -apple-system, 'Segoe UI', sans-serif;
--radius: 6px;
}
html, body { height: 100%; background: var(--bg0); color: var(--text); font-family: var(--font-ui); font-size: 14px; }
/* ── App shell ──────────────────────────────────────────────────────────── */
.app { display: flex; flex-direction: column; height: 100vh; overflow: hidden; }
/* ── Header ────────────────────────────────────────────────────────────── */
.app-header {
display: flex; align-items: center; justify-content: space-between;
padding: 10px 16px;
background: var(--bg1);
border-bottom: 1px solid var(--border);
flex-shrink: 0;
}
.brand { display: flex; align-items: baseline; gap: 12px; }
.logo {
font-size: 1rem;
font-weight: 700;
letter-spacing: 0.12em;
text-transform: uppercase;
color: var(--text);
}
.subtitle { color: var(--text-muted); font-size: 0.82rem; }
.header-actions { display: flex; gap: 8px; }
/* ── Buttons ────────────────────────────────────────────────────────────── */
.btn { padding: 6px 16px; border-radius: var(--radius); border: none; cursor: pointer; font-weight: 600; transition: opacity 0.15s; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary { background: var(--bg3); color: var(--text); border: 1px solid var(--border); }
.btn-primary:not(:disabled):hover { border-color: var(--accent); color: var(--accent); }
/* ── Banners ────────────────────────────────────────────────────────────── */
.banner { padding: 8px 16px; font-size: 0.85rem; }
.banner-error { background: #2d1a1a; color: var(--warn); border-bottom: 1px solid var(--warn); }
.banner code { background: rgba(255,255,255,0.08); padding: 0 4px; border-radius: 3px; }
/* ── Panels ─────────────────────────────────────────────────────────────── */
.panels { display: grid; grid-template-columns: 320px 1fr 340px; flex: 1; overflow: hidden; }
.panel { display: flex; flex-direction: column; overflow: hidden; border-right: 1px solid var(--border); }
.panel:last-child { border-right: none; }
.panel-header {
display: flex; align-items: center; justify-content: space-between;
padding: 6px 12px;
background: var(--bg2);
border-bottom: 1px solid var(--border);
flex-shrink: 0;
}
.panel-title {
font-weight: 600;
font-size: 0.72rem;
letter-spacing: 0.08em;
text-transform: uppercase;
color: var(--text-muted);
}
.byte-count { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-muted); }
.format-select {
background: var(--bg3); color: var(--text); border: 1px solid var(--border);
border-radius: var(--radius); padding: 2px 6px; font-size: 0.8rem;
}
/* ── Schema editor ───────────────────────────────────────────────────────── */
.schema-editor { display: flex; flex-direction: column; flex: 1; overflow: hidden; }
.schema-textarea {
flex: 1; resize: none; font-family: var(--font-mono); font-size: 0.8rem;
background: var(--bg1); color: var(--text); border: none; outline: none;
padding: 12px; line-height: 1.6; tab-size: 2;
}
.schema-error { padding: 6px 12px; background: #2d1a1a; color: var(--warn); font-size: 0.8rem; flex-shrink: 0; }
/* ── Hex input ───────────────────────────────────────────────────────────── */
.hex-input-wrapper { flex-shrink: 0; border-bottom: 1px solid var(--border); }
.hex-input {
width: 100%; resize: none; font-family: var(--font-mono); font-size: 0.85rem;
background: var(--bg2); color: var(--accent); border: none; outline: none;
padding: 10px 12px; line-height: 1.7;
}
/* ── Hex viewer ──────────────────────────────────────────────────────────── */
.hex-viewer { flex: 1; overflow-y: auto; padding: 8px 0; }
.hex-grid {
display: grid;
grid-template-columns: 50px 1fr auto;
gap: 0;
font-family: var(--font-mono);
font-size: 0.8rem;
line-height: 1.9;
}
.hex-offset { color: var(--text-muted); padding: 0 8px; user-select: none; }
.hex-bytes { display: flex; flex-wrap: wrap; gap: 2px; padding: 0 4px; }
.hex-byte {
display: inline-block;
width: 22px; text-align: center;
cursor: pointer;
border-radius: 3px;
transition: background 0.08s;
padding: 0 1px;
}
.hex-pad { color: transparent; }
.hex-ascii { color: var(--text-muted); padding: 0 8px; user-select: none; letter-spacing: 0.05em; }
.ascii-char { cursor: pointer; border-radius: 2px; }
/* ── Byte states ─────────────────────────────────────────────────────────── */
.byte-parsed { color: var(--text); }
.byte-hovered { background: rgba(88,166,255,0.25); color: #fff; }
.byte-selected { background: var(--accent); color: #000 !important; border-radius: 3px; }
.byte-error { color: var(--warn); }
.byte-ok { color: var(--accent2); }
/* ── Hex legend ─────────────────────────────────────────────────────────── */
.hex-legend {
display: flex; align-items: center; gap: 6px;
padding: 6px 12px; font-size: 0.78rem; color: var(--text-muted);
border-top: 1px solid var(--border); flex-shrink: 0;
}
.legend-dot { display: inline-block; width: 10px; height: 10px; border-radius: 2px; }
.legend-dot.selected { background: var(--accent); }
/* ── Parsed tree ────────────────────────────────────────────────────────── */
.parsed-tree { flex: 1; overflow-y: auto; }
.parsed-node {
display: flex; align-items: center; gap: 6px;
padding: 3px 8px; cursor: pointer;
border-left: 2px solid transparent;
transition: background 0.08s;
font-size: 0.82rem;
}
.parsed-node:hover { background: var(--bg2); }
.node-selected { background: rgba(88,166,255,0.12) !important; border-left-color: var(--accent); }
.node-hovered { background: rgba(88,166,255,0.07); }
.node-error { border-left-color: var(--warn); }
.node-ok { border-left-color: var(--accent2); }
.expand-btn {
background: none; border: none; cursor: pointer;
width: 14px; height: 14px; flex-shrink: 0;
display: inline-flex; align-items: center; justify-content: center;
}
.expand-icon {
display: block;
width: 0; height: 0;
border-top: 4px solid transparent;
border-bottom: 4px solid transparent;
border-left: 6px solid var(--text-muted);
transition: transform 0.12s ease;
}
.expand-icon.expanded { transform: rotate(90deg); }
.expand-spacer { display: inline-block; width: 14px; }
.node-kind {
font-size: 0.68rem; font-family: var(--font-mono);
background: var(--bg3); color: var(--purple);
border-radius: 3px; padding: 1px 5px;
white-space: nowrap; flex-shrink: 0;
}
.node-name { font-weight: 600; color: var(--text); flex-shrink: 0; }
.node-value { flex: 1; font-family: var(--font-mono); font-size: 0.78rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.node-meta { color: var(--text-muted); font-family: var(--font-mono); font-size: 0.7rem; flex-shrink: 0; }
.val-int { color: var(--orange); }
.val-float { color: var(--yellow); }
.val-string { color: var(--accent2); }
.val-crc { color: var(--purple); }
.node-desc {
font-size: 0.78rem; color: var(--text-muted);
padding: 2px 8px 4px;
font-style: italic;
}
/* ── Flag chips ─────────────────────────────────────────────────────────── */
.flag-chip {
display: inline-block; font-size: 0.65rem; font-family: var(--font-mono);
padding: 1px 5px; border-radius: 3px; margin-right: 3px; font-weight: 700;
}
.flag-set { background: rgba(63,185,80,0.25); color: var(--accent2); }
.flag-unset { background: var(--bg3); color: var(--text-muted); }
.bytes-preview { color: var(--accent); font-size: 0.72rem; }
/* ── Badges ─────────────────────────────────────────────────────────────── */
.badge { font-size: 0.65rem; font-weight: 700; padding: 1px 6px; border-radius: 10px; flex-shrink: 0; }
.badge-ok { background: rgba(63,185,80,0.2); color: var(--accent2); }
.badge-err { background: rgba(248,81,73,0.2); color: var(--warn); }
/* ── Empty hints ────────────────────────────────────────────────────────── */
.empty-hint { padding: 24px 16px; color: var(--text-muted); text-align: center; }
.parse-error { padding: 10px 14px; background: #2d1a1a; color: var(--warn); font-size: 0.82rem; border-bottom: 1px solid var(--warn); }
/* ── Scrollbars ─────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg0); }
::-webkit-scrollbar-thumb { background: var(--bg3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }
+70
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@@ -0,0 +1,70 @@
// ── Schema types (mirrors Rust schema.rs) ──────────────────────────────────
export type Endian = 'big' | 'little'
export type FieldKind =
| 'uint8' | 'uint16' | 'uint32' | 'uint64'
| 'int8' | 'int16' | 'int32'
| 'float32' | 'float64'
| 'bitflags8' | 'bitflags16'
| 'bytes' | 'string_fixed' | 'string_lp8' | 'string_lp16'
| 'crc16' | 'crc32'
| 'repeated' | 'padding'
export interface FlagDef {
bit: number
name: string
description?: string
}
export type CountSpec = number | string
export interface FieldDef {
name: string
type: FieldKind
endian?: Endian
description?: string
flags?: FlagDef[]
length?: number
checksum_range?: [number, number]
count?: CountSpec
fields?: FieldDef[]
}
export interface Schema {
name?: string
endian?: Endian
fields: FieldDef[]
}
// ── ParseResult types (mirrors Rust parser.rs) ─────────────────────────────
export type ParsedValue =
| number
| string
| number[] // bytes
| FlagValue[]
| null
export interface FlagValue {
bit: number
name: string
set: boolean
}
export interface ParsedField {
name: string
kind: string
offset: number
size: number
value: ParsedValue
description?: string
children?: ParsedField[]
checksum_valid?: boolean
}
export interface ParseResult {
fields: ParsedField[]
total_bytes: number
consumed_bytes: number
}
+26
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@@ -0,0 +1,26 @@
import { describe, expect, it } from 'vitest'
import { parseHexInput, formatHexBytes } from '@/utils/hex'
describe('parseHexInput', () => {
it('parses spaced hex pairs', () => {
expect(parseHexInput('FF 05 48 65')).toEqual([0xFF, 0x05, 0x48, 0x65])
})
it('ignores newlines and tabs', () => {
expect(parseHexInput('FF\n05\t48')).toEqual([0xFF, 0x05, 0x48])
})
it('returns empty array for odd-length input', () => {
expect(parseHexInput('ABC')).toEqual([])
})
it('returns empty array for invalid digits', () => {
expect(parseHexInput('GG')).toEqual([])
})
})
describe('formatHexBytes', () => {
it('formats bytes as uppercase hex', () => {
expect(formatHexBytes([0x0a, 0xff])).toBe('0A FF')
})
})
+17
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@@ -0,0 +1,17 @@
/** Parse a hex dump string into byte values. Whitespace is ignored. */
export function parseHexInput(hex: string): number[] {
const clean = hex.replace(/\s/g, '')
if (clean.length % 2 !== 0) return []
const out: number[] = []
for (let i = 0; i < clean.length; i += 2) {
const b = parseInt(clean.slice(i, i + 2), 16)
if (Number.isNaN(b)) return []
out.push(b)
}
return out
}
/** Format bytes as uppercase hex pairs separated by spaces. */
export function formatHexBytes(bytes: number[]): string {
return bytes.map(b => b.toString(16).padStart(2, '0').toUpperCase()).join(' ')
}
+13
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@@ -0,0 +1,13 @@
import { describe, expect, it } from 'vitest'
import { validateJsonSchema } from '@/utils/schema'
describe('validateJsonSchema', () => {
it('accepts valid JSON', () => {
expect(validateJsonSchema('{"fields":[]}')).toBeNull()
})
it('rejects invalid JSON', () => {
const err = validateJsonSchema('{invalid')
expect(err).not.toBeNull()
})
})
+9
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@@ -0,0 +1,9 @@
/** Validate JSON schema text. Returns an error message or null if valid. */
export function validateJsonSchema(text: string): string | null {
try {
JSON.parse(text)
return null
} catch (e) {
return String(e)
}
}
+19
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@@ -0,0 +1,19 @@
{
"compilerOptions": {
"target": "ES2022",
"module": "ESNext",
"lib": ["ES2022", "DOM", "DOM.Iterable"],
"moduleResolution": "bundler",
"strict": true,
"jsx": "preserve",
"resolveJsonModule": true,
"isolatedModules": true,
"verbatimModuleSyntax": true,
"skipLibCheck": true,
"paths": {
"@/*": ["./src/*"]
}
},
"include": ["src/**/*.ts", "src/**/*.d.ts", "src/**/*.tsx", "src/**/*.vue"],
"exclude": ["node_modules", "dist"]
}
+18
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@@ -0,0 +1,18 @@
import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import wasm from 'vite-plugin-wasm'
import topLevelAwait from 'vite-plugin-top-level-await'
import { fileURLToPath, URL } from 'node:url'
export default defineConfig({
plugins: [vue(), wasm(), topLevelAwait()],
resolve: {
alias: {
'@': fileURLToPath(new URL('./src', import.meta.url)),
},
},
server: {
port: 5173,
fs: { allow: ['..'] },
},
})
+16
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@@ -0,0 +1,16 @@
import { defineConfig } from 'vitest/config'
import vue from '@vitejs/plugin-vue'
import { fileURLToPath, URL } from 'node:url'
export default defineConfig({
plugins: [vue()],
resolve: {
alias: {
'@': fileURLToPath(new URL('./src', import.meta.url)),
},
},
test: {
environment: 'node',
include: ['src/**/*.test.ts'],
},
})
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checksum = "e11d33f857dc2fb11b8bc75aee111aa9cbeb12cd9f25efd3d4c2a3dd4e235284"
dependencies = [
"bumpalo",
"proc-macro2",
"quote",
"syn 2.0.119",
"wasm-bindgen-shared",
]
[[package]]
name = "wasm-bindgen-shared"
version = "0.2.127"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7ef64dbcc55df09c7e5a46182d181c2cfa3e925f3da937ea764728b4bbb9dcbf"
dependencies = [
"unicode-ident",
]
[[package]]
name = "zmij"
version = "1.0.23"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "29666d0abbfad1e3dc4dcf6144730dd3a3ab225bbbdac83319345b1b44ccfc1b"
+18
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@@ -0,0 +1,18 @@
[package]
name = "hex-pigeon-parser"
version = "0.1.0"
edition = "2021"
[lib]
crate-type = ["cdylib", "rlib"]
[dependencies]
wasm-bindgen = "0.2"
serde = { version = "1.0", features = ["derive"] }
serde-wasm-bindgen = "0.6"
serde_json = "1.0"
crc = "3.2"
[profile.release]
opt-level = "s"
lto = true
+37
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use crc::{Crc, CRC_16_IBM_SDLC, CRC_32_ISO_HDLC};
pub fn compute_crc16(data: &[u8]) -> u16 {
let crc = Crc::<u16>::new(&CRC_16_IBM_SDLC);
crc.checksum(data)
}
pub fn compute_crc32(data: &[u8]) -> u32 {
let crc = Crc::<u32>::new(&CRC_32_ISO_HDLC);
crc.checksum(data)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn crc16_is_deterministic() {
let a = compute_crc16(b"123456789");
let b = compute_crc16(b"123456789");
assert_eq!(a, b);
assert_ne!(a, compute_crc16(b"123456788"));
}
#[test]
fn crc32_is_deterministic() {
let a = compute_crc32(b"123456789");
let b = compute_crc32(b"123456789");
assert_eq!(a, b);
assert_ne!(a, compute_crc32(b"123456788"));
}
#[test]
fn empty_input_has_known_crc32() {
assert_eq!(compute_crc32(&[]), 0x0000_0000);
}
}
+67
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use wasm_bindgen::prelude::*;
mod parser;
mod schema;
pub mod checksum;
pub use parser::*;
pub use schema::*;
/// Entry point: parse `hex_input` against `schema_json`.
/// Returns a JSON string of `ParseResult`.
#[wasm_bindgen]
pub fn parse(hex_input: &str, schema_json: &str) -> Result<JsValue, JsValue> {
let schema: schema::Schema = serde_json::from_str(schema_json)
.map_err(|e| JsValue::from_str(&format!("Schema error: {e}")))?;
let bytes = hex_to_bytes(hex_input)
.map_err(|e| JsValue::from_str(&e))?;
let result = parser::parse_fields(&bytes, &schema.fields)
.map_err(|e| JsValue::from_str(&e))?;
serde_wasm_bindgen::to_value(&result).map_err(|e| JsValue::from_str(&e.to_string()))
}
/// Convert hex string (with optional spaces/newlines) to bytes.
#[wasm_bindgen]
pub fn hex_to_bytes_js(hex: &str) -> Result<Vec<u8>, JsValue> {
hex_to_bytes(hex).map_err(|e| JsValue::from_str(&e))
}
pub fn hex_to_bytes(hex: &str) -> Result<Vec<u8>, String> {
let clean: String = hex.chars().filter(|c| !c.is_whitespace()).collect();
if clean.len() % 2 != 0 {
return Err(format!("Hex string has odd length: {}", clean.len()));
}
(0..clean.len())
.step_by(2)
.map(|i| {
u8::from_str_radix(&clean[i..i + 2], 16)
.map_err(|_| format!("Invalid hex byte at position {i}: '{}'", &clean[i..i + 2]))
})
.collect()
}
#[cfg(test)]
mod tests {
use super::hex_to_bytes;
#[test]
fn hex_to_bytes_accepts_whitespace() {
let bytes = hex_to_bytes("FF 05\n48 65").expect("parse hex");
assert_eq!(bytes, vec![0xFF, 0x05, 0x48, 0x65]);
}
#[test]
fn hex_to_bytes_rejects_odd_length() {
let err = hex_to_bytes("ABC").unwrap_err();
assert!(err.contains("odd length"));
}
#[test]
fn hex_to_bytes_rejects_invalid_digits() {
let err = hex_to_bytes("GG").unwrap_err();
assert!(err.contains("Invalid hex byte"));
}
}
+309
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use std::collections::HashMap;
use serde::{Deserialize, Serialize};
use crate::schema::{CountSpec, Endian, FieldDef, FieldKind};
use crate::checksum::{compute_crc16, compute_crc32};
/// The result of parsing a full frame.
#[derive(Debug, Serialize, Deserialize)]
pub struct ParseResult {
pub fields: Vec<ParsedField>,
pub total_bytes: usize,
pub consumed_bytes: usize,
}
/// A parsed field with its byte span for highlighting.
#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct ParsedField {
pub name: String,
pub kind: String,
/// Byte offset where this field starts.
pub offset: usize,
/// Number of bytes consumed.
pub size: usize,
/// Human-readable value.
pub value: ParsedValue,
pub description: Option<String>,
/// For repeated/compound fields.
pub children: Option<Vec<ParsedField>>,
/// For checksum fields: whether it matches the computed value.
pub checksum_valid: Option<bool>,
}
#[derive(Debug, Serialize, Deserialize, Clone)]
#[serde(untagged)]
pub enum ParsedValue {
Uint(u64),
Int(i64),
Float(f64),
Bytes(Vec<u8>),
Str(String),
Flags(Vec<FlagValue>),
None,
}
#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct FlagValue {
pub bit: u8,
pub name: String,
pub set: bool,
}
struct Cursor<'a> {
data: &'a [u8],
pos: usize,
}
impl<'a> Cursor<'a> {
fn new(data: &'a [u8]) -> Self {
Self { data, pos: 0 }
}
fn remaining(&self) -> usize {
self.data.len().saturating_sub(self.pos)
}
fn read_bytes(&mut self, n: usize) -> Result<&[u8], String> {
if self.pos + n > self.data.len() {
return Err(format!(
"Not enough bytes at offset {}: need {n}, have {}",
self.pos,
self.remaining()
));
}
let start = self.pos;
self.pos += n;
Ok(&self.data[start..start + n])
}
fn read_u8(&mut self) -> Result<u8, String> {
Ok(self.read_bytes(1)?[0])
}
fn read_u16(&mut self, endian: &Endian) -> Result<u16, String> {
let b = self.read_bytes(2)?;
Ok(match endian {
Endian::Big => u16::from_be_bytes([b[0], b[1]]),
Endian::Little => u16::from_le_bytes([b[0], b[1]]),
})
}
fn read_u32(&mut self, endian: &Endian) -> Result<u32, String> {
let b = self.read_bytes(4)?;
Ok(match endian {
Endian::Big => u32::from_be_bytes([b[0], b[1], b[2], b[3]]),
Endian::Little => u32::from_le_bytes([b[0], b[1], b[2], b[3]]),
})
}
fn read_u64(&mut self, endian: &Endian) -> Result<u64, String> {
let b = self.read_bytes(8)?;
let arr: [u8; 8] = b.try_into().unwrap();
Ok(match endian {
Endian::Big => u64::from_be_bytes(arr),
Endian::Little => u64::from_le_bytes(arr),
})
}
}
pub fn parse_fields(data: &[u8], fields: &[FieldDef]) -> Result<ParseResult, String> {
let mut cursor = Cursor::new(data);
let mut parsed = Vec::new();
// Track named uint fields for dynamic count resolution.
let mut named_uints: HashMap<String, usize> = HashMap::new();
parse_fields_inner(data, &mut cursor, fields, &mut parsed, &mut named_uints)?;
Ok(ParseResult {
fields: parsed,
total_bytes: data.len(),
consumed_bytes: cursor.pos,
})
}
fn parse_fields_inner(
full_data: &[u8],
cursor: &mut Cursor,
fields: &[FieldDef],
out: &mut Vec<ParsedField>,
named_uints: &mut HashMap<String, usize>,
) -> Result<(), String> {
// Default endian if not specified in field.
let global_endian = Endian::Big;
for field in fields {
let endian = field.endian.as_ref().unwrap_or(&global_endian);
let offset = cursor.pos;
let (value, size, children, checksum_valid) = match &field.kind {
FieldKind::Uint8 => {
let v = cursor.read_u8()? as u64;
named_uints.insert(field.name.clone(), v as usize);
(ParsedValue::Uint(v), 1, None, None)
}
FieldKind::Uint16 => {
let v = cursor.read_u16(endian)? as u64;
named_uints.insert(field.name.clone(), v as usize);
(ParsedValue::Uint(v), 2, None, None)
}
FieldKind::Uint32 => {
let v = cursor.read_u32(endian)? as u64;
named_uints.insert(field.name.clone(), v as usize);
(ParsedValue::Uint(v), 4, None, None)
}
FieldKind::Uint64 => {
let v = cursor.read_u64(endian)?;
(ParsedValue::Uint(v), 8, None, None)
}
FieldKind::Int8 => {
let v = cursor.read_u8()? as i8;
(ParsedValue::Int(v as i64), 1, None, None)
}
FieldKind::Int16 => {
let raw = cursor.read_u16(endian)?;
let v = raw as i16;
(ParsedValue::Int(v as i64), 2, None, None)
}
FieldKind::Int32 => {
let raw = cursor.read_u32(endian)?;
let v = raw as i32;
(ParsedValue::Int(v as i64), 4, None, None)
}
FieldKind::Float32 => {
let raw = cursor.read_u32(endian)?;
let v = f32::from_bits(raw) as f64;
(ParsedValue::Float(v), 4, None, None)
}
FieldKind::Float64 => {
let raw = cursor.read_u64(endian)?;
let v = f64::from_bits(raw);
(ParsedValue::Float(v), 8, None, None)
}
FieldKind::Bitflags8 => {
let byte = cursor.read_u8()?;
let flags = resolve_flags(byte as u64, field.flags.as_deref().unwrap_or(&[]));
(ParsedValue::Flags(flags), 1, None, None)
}
FieldKind::Bitflags16 => {
let raw = cursor.read_u16(endian)? as u64;
let flags = resolve_flags(raw, field.flags.as_deref().unwrap_or(&[]));
(ParsedValue::Flags(flags), 2, None, None)
}
FieldKind::Bytes => {
let len = field.length.ok_or_else(|| {
format!("Field '{}': 'bytes' type requires 'length'", field.name)
})?;
let b = cursor.read_bytes(len)?.to_vec();
(ParsedValue::Bytes(b), len, None, None)
}
FieldKind::Padding => {
let len = field.length.unwrap_or(1);
cursor.read_bytes(len)?;
(ParsedValue::None, len, None, None)
}
FieldKind::StringFixed => {
let len = field.length.ok_or_else(|| {
format!("Field '{}': 'string_fixed' requires 'length'", field.name)
})?;
let raw = cursor.read_bytes(len)?.to_vec();
let s = String::from_utf8_lossy(&raw)
.trim_end_matches('\0')
.to_string();
(ParsedValue::Str(s), len, None, None)
}
FieldKind::StringLp8 => {
let len = cursor.read_u8()? as usize;
let raw = cursor.read_bytes(len)?.to_vec();
let s = String::from_utf8_lossy(&raw).into_owned();
(ParsedValue::Str(s), 1 + len, None, None)
}
FieldKind::StringLp16 => {
let len = cursor.read_u16(endian)? as usize;
let raw = cursor.read_bytes(len)?.to_vec();
let s = String::from_utf8_lossy(&raw).into_owned();
(ParsedValue::Str(s), 2 + len, None, None)
}
FieldKind::Crc16 => {
let stored = cursor.read_u16(endian)?;
let valid = if let Some(range) = field.checksum_range {
let slice = full_data
.get(range[0]..range[1])
.ok_or_else(|| format!("CRC range {:?} out of bounds", range))?;
let computed = compute_crc16(slice);
Some(computed == stored)
} else {
None
};
(ParsedValue::Uint(stored as u64), 2, None, valid)
}
FieldKind::Crc32 => {
let stored = cursor.read_u32(endian)?;
let valid = if let Some(range) = field.checksum_range {
let slice = full_data
.get(range[0]..range[1])
.ok_or_else(|| format!("CRC range {:?} out of bounds", range))?;
let computed = compute_crc32(slice);
Some(computed == stored)
} else {
None
};
(ParsedValue::Uint(stored as u64), 4, None, valid)
}
FieldKind::Repeated => {
let inner_fields = field.fields.as_deref().ok_or_else(|| {
format!("Field '{}': 'repeated' requires 'fields'", field.name)
})?;
let count = match field.count.as_ref() {
Some(CountSpec::Fixed(n)) => *n,
Some(CountSpec::Field(name)) => *named_uints
.get(name)
.ok_or_else(|| format!("Count field '{}' not found", name))?,
None => {
return Err(format!(
"Field '{}': 'repeated' requires 'count'",
field.name
))
}
};
let start = cursor.pos;
let mut children_out = Vec::new();
let mut child_named = named_uints.clone();
for _ in 0..count {
let mut iteration = Vec::new();
parse_fields_inner(
full_data,
cursor,
inner_fields,
&mut iteration,
&mut child_named,
)?;
children_out.extend(iteration);
}
let size = cursor.pos - start;
(ParsedValue::None, size, Some(children_out), None)
}
};
out.push(ParsedField {
name: field.name.clone(),
kind: format!("{:?}", field.kind),
offset,
size,
value,
description: field.description.clone(),
children,
checksum_valid,
});
}
Ok(())
}
fn resolve_flags(raw: u64, defs: &[crate::schema::FlagDef]) -> Vec<FlagValue> {
defs.iter()
.map(|f| FlagValue {
bit: f.bit,
name: f.name.clone(),
set: (raw >> f.bit) & 1 == 1,
})
.collect()
}
+110
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use serde::{Deserialize, Serialize};
/// A full schema describing a binary frame layout.
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Schema {
/// Human-readable name for this schema.
pub name: Option<String>,
/// Endianness applied globally unless overridden per field.
#[serde(default = "default_endian")]
pub endian: Endian,
/// Ordered list of fields to parse.
pub fields: Vec<FieldDef>,
}
fn default_endian() -> Endian {
Endian::Big
}
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
#[serde(rename_all = "lowercase")]
pub enum Endian {
Big,
Little,
}
/// A single field definition.
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct FieldDef {
/// Display name.
pub name: String,
/// Field type.
#[serde(rename = "type")]
pub kind: FieldKind,
/// Override global endianness for this field.
pub endian: Option<Endian>,
/// Description / comment shown in the tree.
pub description: Option<String>,
/// For bitflags: the flag definitions.
pub flags: Option<Vec<FlagDef>>,
/// For `bytes` type: number of bytes (required).
/// For `string_lp8` / `string_lp16`: omit (length is read from data).
/// For other types: derived from type width.
pub length: Option<usize>,
/// For `crc16` / `crc32`: byte range to checksum [start, end) relative to frame start.
pub checksum_range: Option<[usize; 2]>,
/// For `repeated`: how many repetitions (constant or from a previously parsed field name).
pub count: Option<CountSpec>,
/// For `repeated`: the inner fields to repeat.
pub fields: Option<Vec<FieldDef>>,
}
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "snake_case")]
pub enum FieldKind {
/// 1 byte unsigned.
Uint8,
/// 2 bytes unsigned.
Uint16,
/// 4 bytes unsigned.
Uint32,
/// 8 bytes unsigned.
Uint64,
/// 1 byte signed.
Int8,
/// 2 bytes signed.
Int16,
/// 4 bytes signed.
Int32,
/// 4 bytes float.
Float32,
/// 8 bytes float.
Float64,
/// 1-byte bitfield with named flags.
Bitflags8,
/// 2-byte bitfield with named flags.
Bitflags16,
/// Raw bytes of `length`.
Bytes,
/// Null-terminated string of `length` bytes.
StringFixed,
/// Pascal-style: 1-byte length prefix, then UTF-8 bytes.
StringLp8,
/// Pascal-style: 2-byte length prefix (respects endian), then UTF-8 bytes.
StringLp16,
/// CRC-16/CCITT checksum (2 bytes).
Crc16,
/// CRC-32 checksum (4 bytes).
Crc32,
/// Repeat inner `fields` `count` times.
Repeated,
/// Skip / padding bytes.
Padding,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct FlagDef {
/// Bit index (0 = LSB).
pub bit: u8,
pub name: String,
pub description: Option<String>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(untagged)]
pub enum CountSpec {
/// Literal count.
Fixed(usize),
/// Name of a previously parsed uint field holding the count.
Field(String),
}
+297
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@@ -0,0 +1,297 @@
use hex_pigeon_parser::checksum::{compute_crc16, compute_crc32};
use hex_pigeon_parser::{
parse_fields, CountSpec, Endian, FieldDef, FieldKind, FlagDef, ParsedValue, Schema,
};
fn field(name: &str, kind: FieldKind) -> FieldDef {
FieldDef {
name: name.to_string(),
kind,
endian: None,
description: None,
flags: None,
length: None,
checksum_range: None,
count: None,
fields: None,
}
}
fn field_len(name: &str, kind: FieldKind, length: usize) -> FieldDef {
let mut f = field(name, kind);
f.length = Some(length);
f
}
#[test]
fn schema_deserializes_from_json() {
let json = r#"{
"name": "Test",
"endian": "little",
"fields": [{ "name": "id", "type": "uint8" }]
}"#;
let schema: Schema = serde_json::from_str(json).expect("schema JSON");
assert_eq!(schema.name.as_deref(), Some("Test"));
assert_eq!(schema.endian, Endian::Little);
assert_eq!(schema.fields.len(), 1);
assert_eq!(schema.fields[0].kind, FieldKind::Uint8);
}
#[test]
fn parses_integer_types_big_endian() {
let data = [
0x12,
0x12, 0x34,
0x12, 0x34, 0x56, 0x78,
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0,
0xFE,
0xFF, 0xF0,
0x80, 0x00, 0x00, 0x01,
];
let fields = vec![
field("u8", FieldKind::Uint8),
field("u16", FieldKind::Uint16),
field("u32", FieldKind::Uint32),
field("u64", FieldKind::Uint64),
field("i8", FieldKind::Int8),
field("i16", FieldKind::Int16),
field("i32", FieldKind::Int32),
];
let result = parse_fields(&data, &fields).expect("parse");
assert_eq!(result.consumed_bytes, 22);
assert!(matches!(result.fields[0].value, ParsedValue::Uint(0x12)));
assert!(matches!(result.fields[1].value, ParsedValue::Uint(0x1234)));
assert!(matches!(result.fields[2].value, ParsedValue::Uint(0x12345678)));
assert!(matches!(result.fields[3].value, ParsedValue::Uint(0x123456789ABCDEF0)));
assert!(matches!(result.fields[4].value, ParsedValue::Int(-2)));
assert!(matches!(result.fields[5].value, ParsedValue::Int(-16)));
assert!(matches!(result.fields[6].value, ParsedValue::Int(-2147483647)));
}
#[test]
fn parses_integer_types_little_endian() {
let data = [0x34, 0x12];
let mut f = field("u16", FieldKind::Uint16);
f.endian = Some(Endian::Little);
let result = parse_fields(&data, &[f]).expect("parse");
assert!(matches!(result.fields[0].value, ParsedValue::Uint(0x1234)));
}
#[test]
fn parses_float_types() {
let f32_bits = 1.0f32.to_bits();
let f64_bits = 2.5f64.to_bits();
let mut data = Vec::new();
data.extend_from_slice(&f32_bits.to_be_bytes());
data.extend_from_slice(&f64_bits.to_be_bytes());
let fields = vec![field("f32", FieldKind::Float32), field("f64", FieldKind::Float64)];
let result = parse_fields(&data, &fields).expect("parse");
match &result.fields[0].value {
ParsedValue::Float(v) => assert!((v - 1.0).abs() < f64::EPSILON),
other => panic!("expected float32, got {other:?}"),
}
match &result.fields[1].value {
ParsedValue::Float(v) => assert!((v - 2.5).abs() < f64::EPSILON),
other => panic!("expected float64, got {other:?}"),
}
}
#[test]
fn parses_bitflags() {
let mut f8 = field("flags8", FieldKind::Bitflags8);
f8.flags = Some(vec![
FlagDef {
bit: 0,
name: "A".into(),
description: None,
},
FlagDef {
bit: 3,
name: "D".into(),
description: None,
},
]);
let mut f16 = field("flags16", FieldKind::Bitflags16);
f16.flags = Some(vec![FlagDef {
bit: 1,
name: "B".into(),
description: None,
}]);
let result = parse_fields(&[0b0000_0101, 0x00, 0b0000_0010], &[f8, f16]).expect("parse");
match &result.fields[0].value {
ParsedValue::Flags(flags) => {
assert!(flags.iter().find(|f| f.name == "A").unwrap().set);
assert!(!flags.iter().find(|f| f.name == "D").unwrap().set);
}
other => panic!("expected flags8, got {other:?}"),
}
match &result.fields[1].value {
ParsedValue::Flags(flags) => assert!(flags[0].set),
other => panic!("expected flags16, got {other:?}"),
}
}
#[test]
fn parses_bytes_padding_and_strings() {
let data = [
0xAA, 0xBB, 0xCC, // bytes[3]
0x00, 0x00, // padding[2]
b'H', b'i', 0x00, 0x00, // string_fixed[4] -> "Hi"
0x03, b'F', b'O', b'O', // string_lp8
0x00, 0x02, b'B', b'R', // string_lp16 big-endian length
];
let fields = vec![
field_len("raw", FieldKind::Bytes, 3),
field_len("pad", FieldKind::Padding, 2),
field_len("fixed", FieldKind::StringFixed, 4),
field("lp8", FieldKind::StringLp8),
field("lp16", FieldKind::StringLp16),
];
let result = parse_fields(&data, &fields).expect("parse");
assert!(matches!(&result.fields[0].value, ParsedValue::Bytes(v) if v == &[0xAA, 0xBB, 0xCC]));
assert!(matches!(result.fields[1].value, ParsedValue::None));
assert!(matches!(&result.fields[2].value, ParsedValue::Str(s) if s == "Hi"));
assert!(matches!(&result.fields[3].value, ParsedValue::Str(s) if s == "FOO"));
assert!(matches!(&result.fields[4].value, ParsedValue::Str(s) if s == "BR"));
}
#[test]
fn validates_crc16_and_crc32() {
let payload = [0x01, 0x02, 0x03, 0x04];
let crc16 = compute_crc16(&payload);
let crc32 = compute_crc32(&payload);
let mut data = payload.to_vec();
data.extend_from_slice(&crc16.to_be_bytes());
data.extend_from_slice(&crc32.to_be_bytes());
let mut crc16_field = field("c16", FieldKind::Crc16);
crc16_field.checksum_range = Some([0, 4]);
let mut crc32_field = field("c32", FieldKind::Crc32);
crc32_field.checksum_range = Some([0, 4]);
let fields = vec![
field_len("payload", FieldKind::Bytes, 4),
crc16_field,
crc32_field,
];
let result = parse_fields(&data, &fields).expect("parse");
assert_eq!(result.fields[1].checksum_valid, Some(true));
assert_eq!(result.fields[2].checksum_valid, Some(true));
let mut bad = data.clone();
bad[6] ^= 0xFF;
let mut crc32_bad = field("c32", FieldKind::Crc32);
crc32_bad.checksum_range = Some([0, 4]);
let fields = vec![
field_len("payload", FieldKind::Bytes, 4),
crc32_bad,
];
let result = parse_fields(&bad, &fields).expect("parse");
assert_eq!(result.fields[1].checksum_valid, Some(false));
}
#[test]
fn parses_repeated_fixed_and_dynamic_count() {
let data = [0x02, 0x10, 0x20, 0x11, 0x21];
let repeated_fixed = FieldDef {
name: "items".into(),
kind: FieldKind::Repeated,
endian: None,
description: None,
flags: None,
length: None,
checksum_range: None,
count: Some(CountSpec::Fixed(2)),
fields: Some(vec![field("val", FieldKind::Uint8)]),
};
let result = parse_fields(&[0x10, 0x20, 0x11, 0x21], &[repeated_fixed]).expect("parse");
let children = result.fields[0].children.as_ref().expect("children");
assert_eq!(children.len(), 2);
assert!(matches!(children[0].value, ParsedValue::Uint(0x10)));
assert!(matches!(children[1].value, ParsedValue::Uint(0x20)));
let repeated_dynamic = FieldDef {
name: "list".into(),
kind: FieldKind::Repeated,
endian: None,
description: None,
flags: None,
length: None,
checksum_range: None,
count: Some(CountSpec::Field("count".into())),
fields: Some(vec![field("val", FieldKind::Uint8)]),
};
let result = parse_fields(&data, &[field("count", FieldKind::Uint8), repeated_dynamic]).expect("parse");
let children = result.fields[1].children.as_ref().expect("children");
assert_eq!(children.len(), 2);
}
#[test]
fn errors_on_truncated_buffer() {
let result = parse_fields(&[0x01], &[field("u16", FieldKind::Uint16)]);
assert!(result.is_err());
assert!(result.unwrap_err().contains("Not enough bytes"));
}
#[test]
fn errors_on_missing_required_field_options() {
let err = parse_fields(&[0x01], &[field("raw", FieldKind::Bytes)]).unwrap_err();
assert!(err.contains("requires 'length'"));
let repeated = FieldDef {
name: "r".into(),
kind: FieldKind::Repeated,
endian: None,
description: None,
flags: None,
length: None,
checksum_range: None,
count: Some(CountSpec::Fixed(1)),
fields: None,
};
let err = parse_fields(&[0x01], &[repeated]).unwrap_err();
assert!(err.contains("requires 'fields'"));
}
#[test]
fn parses_example_protocol_frame() {
let header = [
0xFF, 0x05, b'H', b'e', b'l', b'l', b'o', 0x00, 0x01, 0x02, 0x03, b'A', b'B', b'C',
b'D',
];
let crc32 = compute_crc32(&header[..11]);
let mut data = header.to_vec();
data.extend_from_slice(&crc32.to_be_bytes());
data.extend_from_slice(&[0x00, 0x03]); // flags: ACK + SYN
let schema_json = include_str!("../../frontend/src/fixtures/example-schema.json");
let schema: Schema = serde_json::from_str(schema_json).expect("example schema");
let result = parse_fields(&data, &schema.fields).expect("example frame");
assert_eq!(result.total_bytes, data.len());
assert_eq!(result.consumed_bytes, data.len());
assert_eq!(result.fields.len(), 7);
assert!(matches!(result.fields[0].value, ParsedValue::Uint(0xFF)));
assert!(matches!(&result.fields[2].value, ParsedValue::Str(s) if s == "Hello"));
assert!(matches!(&result.fields[4].value, ParsedValue::Str(s) if s == "ABCD"));
assert_eq!(result.fields[5].checksum_valid, Some(true));
match &result.fields[6].value {
ParsedValue::Flags(flags) => {
assert!(flags.iter().find(|f| f.name == "ACK").unwrap().set);
assert!(flags.iter().find(|f| f.name == "SYN").unwrap().set);
assert!(!flags.iter().find(|f| f.name == "FIN").unwrap().set);
}
other => panic!("expected flags, got {other:?}"),
}
}
+34
View File
@@ -0,0 +1,34 @@
{ pkgs ? import <nixpkgs> {} }:
pkgs.mkShell {
name = "hex-pigeon-dev";
buildInputs = with pkgs; [
# Rust + WASM toolchain
rustup
wasm-pack
binaryen # wasm-opt
# Node / frontend
nodejs_22
# Utilities
pkg-config
openssl
];
shellHook = ''
export RUSTUP_HOME="$HOME/.rustup"
export CARGO_HOME="$HOME/.cargo"
export PATH="$CARGO_HOME/bin:$PATH"
# Install stable + wasm32 target on first run
rustup toolchain install stable 2>/dev/null || true
rustup default stable 2>/dev/null || true
rustup target add wasm32-unknown-unknown 2>/dev/null || true
echo "HexPigeon dev shell ready"
echo " Build WASM : cd parser-wasm && wasm-pack build --target web --out-dir ../frontend/src/wasm"
echo " Frontend : cd frontend && npm install && npm run dev"
'';
}