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-rw-r--r--src/test/fuzz/asmap_direct.cpp46
1 files changed, 46 insertions, 0 deletions
diff --git a/src/test/fuzz/asmap_direct.cpp b/src/test/fuzz/asmap_direct.cpp
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+++ b/src/test/fuzz/asmap_direct.cpp
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+// Copyright (c) 2020 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <util/asmap.h>
+#include <test/fuzz/fuzz.h>
+
+#include <cstdint>
+#include <vector>
+
+#include <assert.h>
+
+void test_one_input(const std::vector<uint8_t>& buffer)
+{
+ // Encoding: [asmap using 1 bit / byte] 0xFF [addr using 1 bit / byte]
+ bool have_sep = false;
+ size_t sep_pos;
+ for (size_t pos = 0; pos < buffer.size(); ++pos) {
+ uint8_t x = buffer[pos];
+ if ((x & 0xFE) == 0) continue;
+ if (x == 0xFF) {
+ if (have_sep) return;
+ have_sep = true;
+ sep_pos = pos;
+ } else {
+ return;
+ }
+ }
+ if (!have_sep) return; // Needs exactly 1 separator
+ if (buffer.size() - sep_pos - 1 > 128) return; // At most 128 bits in IP address
+
+ // Checks on asmap
+ std::vector<bool> asmap(buffer.begin(), buffer.begin() + sep_pos);
+ if (SanityCheckASMap(asmap, buffer.size() - 1 - sep_pos)) {
+ // Verify that for valid asmaps, no prefix (except up to 7 zero padding bits) is valid.
+ std::vector<bool> asmap_prefix = asmap;
+ while (!asmap_prefix.empty() && asmap_prefix.size() + 7 > asmap.size() && asmap_prefix.back() == false) asmap_prefix.pop_back();
+ while (!asmap_prefix.empty()) {
+ asmap_prefix.pop_back();
+ assert(!SanityCheckASMap(asmap_prefix, buffer.size() - 1 - sep_pos));
+ }
+ // No address input should trigger assertions in interpreter
+ std::vector<bool> addr(buffer.begin() + sep_pos + 1, buffer.end());
+ (void)Interpret(asmap, addr);
+ }
+}