From 56f846cf74961eecd00242276dd566e1b6134e10 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 8 Dec 2022 10:39:54 +0700
Subject: move fuzz into test/fuzz

---
 test/fuzz/device/net/src/fuzz.cc | 99 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 test/fuzz/device/net/src/fuzz.cc

(limited to 'test/fuzz/device/net/src/fuzz.cc')

diff --git a/test/fuzz/device/net/src/fuzz.cc b/test/fuzz/device/net/src/fuzz.cc
new file mode 100644
index 000000000..ea4943665
--- /dev/null
+++ b/test/fuzz/device/net/src/fuzz.cc
@@ -0,0 +1,99 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022 Nathaniel Brough
+ *
+ * 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.
+ *
+ */
+
+#include <cassert>
+#include <fuzzer/FuzzedDataProvider.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "class/cdc/cdc_device.h"
+#include "class/net/net_device.h"
+#include "fuzz/fuzz.h"
+#include "tusb.h"
+#include <cstdint>
+#include <string>
+#include <vector>
+
+extern "C" {
+
+#define FUZZ_ITERATIONS 500
+
+//--------------------------------------------------------------------+
+// MACRO CONSTANT TYPEDEF PROTYPES
+//--------------------------------------------------------------------+
+
+void net_task(FuzzedDataProvider *provider);
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+  FuzzedDataProvider provider(Data, Size);
+  std::vector<uint8_t> callback_data = provider.ConsumeBytes<uint8_t>(
+      provider.ConsumeIntegralInRange<size_t>(0, Size));
+  fuzz_init(callback_data.data(), callback_data.size());
+  // init device stack on configured roothub port
+  tud_init(BOARD_TUD_RHPORT);
+
+  for (int i = 0; i < FUZZ_ITERATIONS; i++) {
+    if (provider.remaining_bytes() == 0) {
+      return 0;
+    }
+    tud_int_handler(provider.ConsumeIntegral<uint8_t>());
+    tud_task(); // tinyusb device task
+    net_task(&provider);
+  }
+
+  return 0;
+}
+
+//--------------------------------------------------------------------+
+// USB CDC
+//--------------------------------------------------------------------+
+enum NetApiFuncs {
+  kNetworkRecvRenew,
+  kNetworkCanXmit,
+  kNetworkXmit,
+  kMaxValue,
+};
+
+void net_task(FuzzedDataProvider *provider) {
+
+  assert(provider != NULL);
+  switch (provider->ConsumeEnum<NetApiFuncs>()) {
+  
+  case kNetworkRecvRenew:
+    tud_network_recv_renew();
+    break;
+  case kNetworkCanXmit:
+ (void)tud_network_can_xmit(provider->ConsumeIntegral<uint16_t>());
+  case kNetworkXmit:
+    // TODO: Actually pass real values here later.
+    tud_network_xmit(NULL, 0);
+
+  case kMaxValue:
+    // Noop.
+    break;
+  }
+}
+}
-- 
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