https://cybertoolchain.io/tools/tcpreplay New releases and features in tcpreplay, tracked by The Cyber Toolchain. en Sat, 15 Aug 2026 00:41:52 GMT https://github.com/appneta/tcpreplay/releases/tag/v4.6.1 https://github.com/appneta/tcpreplay/releases/tag/v4.6.1 Sat, 15 Aug 2026 00:41:52 GMT tcpreplay 4.6.1 adds a continuous OSS-Fuzz pipeline with three libFuzzer targets and removes `--xdp-batch-size`. • Adds three libFuzzer targets (`fuzz_pcap`, `fuzz_fragroute`, `fuzz_services`) under `test/fuzz/`, built against ASan/UBSan and submitted to OSS-Fuzz for continuous fuzzing of the pcap parser, fragroute rules engine, and tcpprep `--services` parser. • UBSan now runs alongside ASan in CI, catching misaligned-access bugs; wire-format header structs are now marked `packed`, hardening packet parsers against a class of defects ASan alone misses. • Adds a dependency-free unit test suite under `test/unit/`, runnable via `make check` or `ctest`. Breaking changes: • The `--xdp-batch-size` flag has been removed; any script or config that passes it will fail on upgrade. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/tcpreplay https://github.com/appneta/tcpreplay/releases/tag/v4.6.0 https://github.com/appneta/tcpreplay/releases/tag/v4.6.0 Tue, 28 Jul 2026 00:31:04 GMT tcpreplay 4.6.0 adds AF_XDP and io_uring injection backends, --loss simulation, --raw socket path, and a static libtcpreplay library. • Adds `--xdp` AF_XDP injection backend, now reaching ~941 Mbps (305k pps) line rate on 1GigE hardware — a 23× improvement over the previous implementation. • Adds `--xdp-queue` to bind the AF_XDP socket to a specific adapter queue instead of always using queue 0. • Adds `--xdp-no-fallback` to fail hard rather than silently fall back to the default injector — useful for benchmarking where a silent injector change would invalidate results. • Adds `--xdp-batch-size` for tuning AF_XDP batch depth on very high-speed links (100GigE+) with small packets. • Adds `--io-uring` injection backend that batches sends 64 deep via Linux io_uring, reducing per-packet syscall count 64× for ~11% less CPU per packet. • Adds `--raw` PF_INET/SOCK_RAW injection path that routes packets through the kernel IP stack (routing, netfilter); IPv4-only, rebuilds L2 framing. • Adds `--loss` flag for random percent packet-loss simulation (0–100%), enabling testing against non-ideal network conditions. • Adds support for replaying onto raw IP (L3-only) interfaces such as WireGuard and tun, which have no L2 header. • Installs the replay engine as `libtcpreplay`, a standalone static C library. • Adds CMake build system (`cmake -B build && cmake --build build`) as an alternative to autotools, with full feature parity. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/tcpreplay https://github.com/appneta/tcpreplay/releases/tag/v4.6.0 https://github.com/appneta/tcpreplay/releases/tag/v4.6.0 Tue, 28 Jul 2026 00:31:04 GMT tcpreplay 4.6.0 adds AF_XDP and io_uring injection backends, --loss simulation, --raw socket path, and a static libtcpreplay library. • Adds `--xdp` AF_XDP injection backend, now reaching ~941 Mbps (305k pps) line rate on 1GigE hardware — a 23× improvement over the previous implementation. • Adds `--xdp-queue` to bind the AF_XDP socket to a specific adapter queue instead of always using queue 0. • Adds `--xdp-no-fallback` to fail hard rather than silently fall back to the default injector — useful for benchmarking where a silent injector change would invalidate results. • Adds `--xdp-batch-size` for tuning AF_XDP batch depth on very high-speed links (100GigE+) with small packets. • Adds `--io-uring` injection backend that batches sends 64 deep via Linux io_uring, reducing per-packet syscall count 64× for ~11% less CPU per packet. • Adds `--raw` PF_INET/SOCK_RAW injection path that routes packets through the kernel IP stack (routing, netfilter); IPv4-only, rebuilds L2 framing. • Adds `--loss` flag for random percent packet-loss simulation (0–100%), enabling testing against non-ideal network conditions. • Adds support for replaying onto raw IP (L3-only) interfaces such as WireGuard and tun, which have no L2 header. • Installs the replay engine as `libtcpreplay`, a standalone static C library. • Adds CMake build system (`cmake -B build && cmake --build build`) as an alternative to autotools, with full feature parity. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/tcpreplay https://github.com/appneta/tcpreplay/releases/tag/v4.5.1 https://github.com/appneta/tcpreplay/releases/tag/v4.5.1 Fri, 12 Jul 2024 17:30:24 GMT tcpreplay v4.5.1 adds AF_XDP line-rate transmission, -w pcap output, and --include/--exclude packet filtering • Adds `-w <file>` tcpreplay option to write replayed packets directly to a PCAP file instead of transmitting them over an interface. • Adds `--include` and `--exclude` tcpreplay options to specify specific packet numbers for selective replay. • Adds `--fixhdrlen` tcpreplay option to control handling of packet length changes during replay. • Adds `-W` tcpreplay option to suppress warnings during packet replay. • Adds AF_XDP socket support via libxdp API, enabling line-rate transmission on newer Linux kernels without third-party modules like netmap or PF_RING. • Adds support for SLL2 (Linux 'cooked' capture encapsulation v2) format. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/tcpreplay