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Stable release v32.1bitcoin/bitcoin · f0de87f04062 ↗3,020 source files · 47.5 MB stored on the server440 file guides

Release published 2026-10-28 · Snapshot fetched 2026-11-01. Latest stable release at fetch time; development branches and Git history are excluded. Only the selected code window and visible folders load here.

bitcoin / bitcoinstable

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▤ addition_overflow.cpp

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bitcoin / src / test / fuzz / p2p_transport_serialization.cpp

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18,032 bytes · SHA-256 d3c49f3fd521b5ed… · View upstream ↗

251        // Decide span to receive
252        size_t to_recv_len = in_flight[side].size();
253        if (!everything) to_recv_len = provider.ConsumeIntegralInRange<size_t>(0, to_recv_len);
254        std::span<const uint8_t> to_recv = std::span{in_flight[side]}.first(to_recv_len);
255        // Process those bytes
256        while (!to_recv.empty()) {
257            size_t old_len = to_recv.size();
258            bool ret = transports[!side]->ReceivedBytes(to_recv);
259            // Bytes must always be accepted, as this test does not introduce any errors in
260            // communication.
261            assert(ret);
262            // Clear cached expected 'more' information: if certainly no more data was to be sent
263            // before, receiving bytes makes this uncertain.
264            if (expect_more[!side] == false) expect_more[!side] = std::nullopt;
265            if (expect_more_next[!side] == false) expect_more_next[!side] = std::nullopt;
266            // Verify consistency of GetBytesToSend after ReceivedBytes
267            bytes_to_send_fn(/*side=*/!side);
268            bool progress = to_recv.size() < old_len;
269            if (transports[!side]->ReceivedMessageComplete()) {
270                bool reject{false};
271                auto received = transports[!side]->GetReceivedMessage({}, reject);
272                // Receiving must succeed.
273                assert(!reject);
274                // There must be a corresponding expected message.
275                assert(!expected[side].empty());
276                // The m_message_size field must be correct.
277                assert(received.m_message_size == received.m_recv.size());
278                // The m_type must match what is expected.
279                assert(received.m_type == expected[side].front().m_type);
280                // The data must match what is expected.
281                assert(std::ranges::equal(received.m_recv, MakeByteSpan(expected[side].front().data)));
282                expected[side].pop_front();
283                progress = true;
284            }
285            // Progress must be made (by processing incoming bytes and/or returning complete
286            // messages) until all received bytes are processed.
287            assert(progress);
288        }
289        // Remove the processed bytes from the in_flight buffer.
290        in_flight[side].erase(in_flight[side].begin(), in_flight[side].begin() + to_recv_len);
291        // Return whether anything was received.
292        return to_recv_len > 0;
293    };
294
295    // Main loop, interleaving new messages, sends, and receives.
296    LIMITED_WHILE (provider.remaining_bytes(), 1000) {
297        CallOneOf(provider,
298            // (Try to) give the next message to the transport.
299            [&] { new_msg_fn(/*side=*/0); },
300            [&] { new_msg_fn(/*side=*/1); },
301            // (Try to) send some bytes from the transport to the network.
302            [&] { send_fn(/*side=*/0); },
303            [&] { send_fn(/*side=*/1); },
304            // (Try to) receive bytes from the network, converting to messages.
305            [&] { recv_fn(/*side=*/0); },
306            [&] { recv_fn(/*side=*/1); }
307        );
308    }
309
310    // When we're done, perform sends and receives of existing messages to flush anything already
311    // in flight.
312    while (true) {
313        bool any = false;
314        if (send_fn(/*side=*/0, /*everything=*/true)) any = true;
315        if (send_fn(/*side=*/1, /*everything=*/true)) any = true;
316        if (recv_fn(/*side=*/0, /*everything=*/true)) any = true;
317        if (recv_fn(/*side=*/1, /*everything=*/true)) any = true;
318        if (!any) break;
319    }
320
321    // Make sure nothing is left in flight.
322    assert(in_flight[0].empty());
323    assert(in_flight[1].empty());
324
325    // Make sure all expected messages were received.
326    assert(expected[0].empty());
327    assert(expected[1].empty());
328
329    // Compare session IDs.
330    assert(transports[0]->GetInfo().session_id == transports[1]->GetInfo().session_id);
331}
332
333std::unique_ptr<Transport> MakeV1Transport(NodeId nodeid) noexcept
334{
335    return std::make_unique<V1Transport>(nodeid);
336}
337
338template<RandomNumberGenerator RNG>
339std::unique_ptr<Transport> MakeV2Transport(NodeId nodeid, bool initiator, RNG& rng, FuzzedDataProvider& provider)
340{
341    // Retrieve key
342    auto key = ConsumePrivateKey(provider);
343    if (!key.IsValid()) return {};
344    // Construct garbage
345    size_t garb_len = provider.ConsumeIntegralInRange<size_t>(0, V2Transport::MAX_GARBAGE_LEN);
346    std::vector<uint8_t> garb;
347    if (garb_len <= 64) {
348        // When the garbage length is up to 64 bytes, read it directly from the fuzzer input.
349        garb = provider.ConsumeBytes<uint8_t>(garb_len);
350        garb.resize(garb_len);
351    } else {
352        // If it's longer, generate it from the RNG. This avoids having large amounts of
353        // (hopefully) irrelevant data needing to be stored in the fuzzer data.
354        garb = rng.randbytes(garb_len);
355    }
356    // Retrieve entropy
357    auto ent = provider.ConsumeBytes<std::byte>(32);
358    ent.resize(32);
359    // Use as entropy SHA256(ent || garbage). This prevents a situation where the fuzzer manages to
360    // include the garbage terminator (which is a function of both ellswift keys) in the garbage.
361    // This is extremely unlikely (~2^-116) with random keys/garbage, but the fuzzer can choose
362    // both non-randomly and dependently. Since the entropy is hashed anyway inside the ellswift
363    // computation, no coverage should be lost by using a hash as entropy, and it removes the
364    // possibility of garbage that happens to contain what is effectively a hash of the keys.
365    CSHA256().Write(UCharCast(ent.data()), ent.size())
366             .Write(garb.data(), garb.size())
367             .Finalize(UCharCast(ent.data()));
368
369    return std::make_unique<V2Transport>(nodeid, initiator, key, ent, std::move(garb));
370}
371
372} // namespace
373
374FUZZ_TARGET(p2p_transport_bidirectional, .init = initialize_p2p_transport_serialization)
375{
376    // Test with two V1 transports talking to each other.
377    FuzzedDataProvider provider{buffer.data(), buffer.size()};
378    InsecureRandomContext rng(provider.ConsumeIntegral<uint64_t>());
379    auto t1 = MakeV1Transport(NodeId{0});
380    auto t2 = MakeV1Transport(NodeId{1});
381    if (!t1 || !t2) return;
382    SimulationTest(*t1, *t2, rng, provider);
383}
384
385FUZZ_TARGET(p2p_transport_bidirectional_v2, .init = initialize_p2p_transport_serialization)
386{
387    // Test with two V2 transports talking to each other.
388    FuzzedDataProvider provider{buffer.data(), buffer.size()};
389    InsecureRandomContext rng(provider.ConsumeIntegral<uint64_t>());
390    auto t1 = MakeV2Transport(NodeId{0}, true, rng, provider);
391    auto t2 = MakeV2Transport(NodeId{1}, false, rng, provider);
392    if (!t1 || !t2) return;
393    SimulationTest(*t1, *t2, rng, provider);
394}
395
396FUZZ_TARGET(p2p_transport_bidirectional_v1v2, .init = initialize_p2p_transport_serialization)
397{
398    // Test with a V1 initiator talking to a V2 responder.
399    FuzzedDataProvider provider{buffer.data(), buffer.size()};
400    InsecureRandomContext rng(provider.ConsumeIntegral<uint64_t>());
401    auto t1 = MakeV1Transport(NodeId{0});
402    auto t2 = MakeV2Transport(NodeId{1}, false, rng, provider);
403    if (!t1 || !t2) return;
404    SimulationTest(*t1, *t2, rng, provider);
405}
406

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440 guided files · 2,580 pending. Guides cover key sections, not every line.

cmake/bitcoin-build-config.h.in src/consensus/amount.h src/consensus/consensus.h src/primitives/block.h src/primitives/transaction.h src/crypto/sha256.h src/util/moneystr.h src/clientversion.h src/uint256.h src/script/script.h src/policy/policy.h CMakeLists.txt README.md COPYING src/consensus/tx_check.cpp src/consensus/tx_verify.cpp src/consensus/merkle.cpp src/pow.cpp src/validation.cpp src/script/interpreter.cpp src/script/solver.cpp src/script/sign.cpp src/key_io.cpp src/net.cpp src/net_processing.cpp src/netaddress.cpp src/protocol.h src/wallet/wallet.cpp src/wallet/spend.cpp

← Previous 250 linesCode page 2

src/wallet/receive.cpp

src/wallet/coinselection.cpp

src/consensus/validation.h

src/primitives/transaction.cpp

src/script/descriptor.cpp

src/bitcoin-cli.cpp

src/rpc/blockchain.cpp

src/rpc/rawtransaction.cpp

src/init.cpp

src/crypto/sha256.cpp

src/consensus/merkle.h

src/consensus/tx_check.h

src/consensus/tx_verify.h

src/policy/feerate.h

src/policy/feerate.cpp

src/primitives/transaction_identifier.h

src/chainparamsbase.h

src/chainparamsbase.cpp

src/util/moneystr.cpp

src/crypto/ripemd160.h

src/crypto/sha1.h

src/crypto/sha512.h

src/crypto/hmac_sha256.h

src/crypto/hmac_sha512.h

src/crypto/hmac_sha256.cpp

src/crypto/hmac_sha512.cpp

src/crypto/hkdf_sha256_32.h

src/crypto/hkdf_sha256_32.cpp

src/support/cleanse.h

src/support/cleanse.cpp

src/crypto/siphash.cpp

src/crypto/muhash.h

src/crypto/chacha20.h

src/crypto/poly1305.h

src/crypto/chacha20poly1305.h

src/crypto/chacha20poly1305.cpp

src/util/chaintype.cpp

src/util/obfuscation.h

src/util/byte_units.h

src/util/overflow.h

src/blockencodings.cpp

src/net_permissions.cpp

src/policy/packages.cpp

src/policy/rbf.cpp

src/policy/truc_policy.cpp

src/policy/ephemeral_policy.cpp

src/policy/settings.cpp

src/policy/policy.cpp

src/node/transaction.cpp

src/node/coin.cpp

src/rpc/client.cpp

src/rpc/external_signer.cpp

src/rpc/request.cpp

src/rpc/server_util.cpp

src/rpc/fees.cpp

src/rpc/output_script.cpp

src/rpc/rawtransaction_util.cpp

src/rpc/rawtransaction_util.h

src/rpc/register.h

src/rpc/request.h

src/rpc/server_util.h

src/rpc/protocol.h

src/rpc/server.h

src/rpc/signmessage.cpp

src/rpc/txoutproof.cpp

src/rpc/util.cpp

src/rpc/util.h

src/wallet/rpc/addresses.cpp

src/wallet/rpc/backup.cpp

src/wallet/rpc/coins.cpp

src/wallet/rpc/encrypt.cpp

src/wallet/rpc/signmessage.cpp

src/wallet/rpc/util.cpp

src/wallet/rpc/util.h

src/wallet/coincontrol.cpp

src/wallet/coincontrol.h

src/wallet/context.cpp

src/wallet/context.h

src/wallet/crypter.cpp

src/wallet/crypter.h

src/wallet/db.cpp

src/wallet/export.cpp

src/wallet/external_signer_scriptpubkeyman.cpp

src/wallet/rpc/spend.cpp

src/wallet/rpc/transactions.cpp

src/wallet/rpc/wallet.cpp

src/wallet/feebumper.cpp

src/wallet/feebumper.h

src/index/base.h

src/index/base.cpp

src/index/txindex.h

src/index/txindex.cpp

src/index/txindex_key.h

src/index/txospenderindex.h

src/index/txospenderindex.cpp

src/index/blockfilterindex.h

src/index/blockfilterindex.cpp

src/index/coinstatsindex.h

src/index/coinstatsindex.cpp

src/index/db_key.h

src/index/disktxpos.h

src/kernel/chain.cpp

src/kernel/chain.h

src/kernel/checks.cpp

src/kernel/checks.h

src/kernel/context.cpp

src/kernel/context.h

src/kernel/cs_main.cpp

src/kernel/cs_main.h

src/kernel/disconnected_transactions.cpp

src/kernel/disconnected_transactions.h

src/kernel/mempool_removal_reason.cpp

src/kernel/mempool_removal_reason.h

src/kernel/coinstats.cpp

src/kernel/coinstats.h

src/kernel/chainparams.cpp

src/kernel/chainparams.h

src/wallet/sqlite.cpp

src/wallet/sqlite.h

src/wallet/transaction.cpp

src/wallet/transaction.h

src/wallet/dump.cpp

src/wallet/dump.h

src/wallet/init.cpp

src/wallet/walletutil.cpp

src/wallet/walletutil.h

src/wallet/wallettool.cpp

src/wallet/wallettool.h

src/wallet/export.h

src/wallet/migrate.cpp

src/wallet/migrate.h

src/wallet/db.h

src/wallet/walletdb.cpp

src/wallet/interfaces.cpp

src/wallet/scriptpubkeyman.cpp

src/wallet/scriptpubkeyman.h

src/kernel/bitcoinkernel.cpp

src/kernel/bitcoinkernel.h

src/kernel/bitcoinkernel_wrapper.h

src/node/chainstate.cpp

src/node/chainstate.h

src/node/blockstorage.cpp

src/node/blockstorage.h

src/node/mempool_persist.cpp

src/node/mempool_persist.h

src/node/utxo_snapshot.cpp

src/node/utxo_snapshot.h

src/node/kernel_notifications.cpp

src/node/kernel_notifications.h

src/node/blockmanager_args.cpp

src/kernel/blockmanager_opts.h

src/util/expected.cpp

src/policy/settings.h

src/util/types.h

src/kernel/messagestartchars.h

src/kernel/warning.h

src/util/exception.h

src/common/license_info.h

src/node/coins_view_args.h

src/node/database_args.h

src/util/batchpriority.h

src/util/ui_change_type.h

src/node/coins_view_args.cpp

src/node/peerman_args.h

src/util/serfloat.h

src/node/blockmanager_args.h

src/node/database_args.cpp

src/util/overloaded.h

src/interfaces/types.h

src/node/chainstatemanager_args.h

src/node/minisketchwrapper.h

src/util/macros.h

src/util/syserror.h

src/common/run_command.h

src/util/bytevectorhash.cpp

src/node/mempool_persist_args.cpp

src/util/exec.h

src/util/rbf.h

src/crypto/hex_base.h

src/node/mempool_persist_args.h

src/interfaces/echo.h

src/util/any.h

src/util/batchpriority.cpp

src/util/threadnames.h

src/node/coin.h

src/node/mempool_args.h

src/util/asmap.h

src/util/bytevectorhash.h

src/node/context.cpp

src/util/insert.h

src/util/readwritefile.h

src/node/peerman_args.cpp

src/node/interface_ui.cpp

src/interfaces/handler.h

src/node/mining_args.h

src/util/hasher.cpp

src/common/init.h

src/kernel/mempool_limits.h

src/common/system.h

src/crypto/sha3.h

src/util/threadinterrupt.cpp

src/node/protocol_version.h

src/util/exception.cpp

src/common/messages.h

src/node/connection_types.cpp

src/util/bip32.h

src/common/license_info.cpp

src/util/stdmutex.h

src/common/run_command.cpp

src/util/check.cpp

src/util/golombrice.h

src/node/types.h

src/node/timeoffsets.h

src/util/readwritefile.cpp

src/util/fastrange.h

src/util/signalinterrupt.h

src/util/task_runner.h

src/util/syserror.cpp

src/common/interfaces.cpp

src/common/types.h

src/util/threadinterrupt.h

src/kernel/chainstatemanager_opts.h

src/node/psbt.h

src/policy/ephemeral_policy.h

src/util/trace.h

src/common/url.cpp

src/kernel/mempool_options.h

src/util/serfloat.cpp

src/kernel/notifications_interface.h

src/node/timeoffsets.cpp

src/node/warnings.cpp

src/util/hash_type.h

src/crypto/hex_base.cpp

src/node/eviction.h

src/util/tokenbucket.h

src/crypto/aes.h

src/common/pcp.h

src/util/feefrac.cpp

src/node/transaction.h

src/util/threadnames.cpp

src/common/signmessage.h

src/util/exec.cpp

src/util/signalinterrupt.cpp

src/clientversion.cpp

src/common/signmessage.cpp

src/compat/assumptions.h

src/compat/byteswap.h

src/deploymentinfo.cpp

src/deploymentinfo.h

src/deploymentstatus.cpp

src/deploymentstatus.h

src/dummywallet.cpp

src/external_signer.h

src/init/bitcoin-gui.cpp

src/init/bitcoin-node.cpp

src/init/bitcoin-qt.cpp

src/init/bitcoin-wallet.cpp

src/init/bitcoind.cpp

src/init/common.h

src/interfaces/init.h

src/interfaces/ipc.h

src/key_io.h

src/logging/categories.h

src/logging/timer.h

src/mapport.h

src/musig.h

src/net_permissions.h

src/netgroup.h

src/netmessagemaker.h

src/node/chainstatemanager_args.cpp

src/node/connection_types.h

src/node/context.h

src/node/interface_ui.h

src/node/mempool_args.cpp

src/node/mining_args.cpp

src/node/minisketchwrapper.cpp

src/node/txreconciliation.h

src/policy/fees/estimator_args.cpp

src/policy/fees/estimator_args.h

src/policy/fees/estimator_man.cpp

src/policy/fees/estimator_man.h

src/policy/packages.h

src/policy/rbf.h

src/policy/truc_policy.h

src/pow.h

src/primitives/block.cpp

src/randomenv.h

src/rest.h

src/script/keyorigin.h

src/script/parsing.cpp

src/script/parsing.h

src/script/script_error.h

src/script/sigcache.cpp

src/script/sigcache.h

src/script/solver.h

src/script/verify_flags.h

src/semaphore_grant.h

src/signet.h

src/span.h

src/support/allocators/secure.h

src/support/allocators/zeroafterfree.h

src/util/tokenpipe.cpp

src/util/translation.h

src/util/vector.h

src/versionbits.h

src/versionbits_impl.h

src/wallet/external_signer_scriptpubkeyman.h

src/wallet/fees.h

src/wallet/load.h

src/wallet/receive.h

src/wallet/rpc/wallet.h

src/wallet/types.h

src/walletinitinterface.h

src/zmq/zmqabstractnotifier.cpp

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