njm64/pcap

Rust language pcap library

pcap

Documentation

This is a Rust language crate for accessing the packet sniffing capabilities of pcap (or wpcap on Windows). If you need anything feel free to post an issue or submit a pull request!

Features:

• List devices
• Open capture handle on a device or savefiles
• Get packets from the capture handle
• Filter packets using BPF programs
• List/set/get datalink link types
• Configure some parameters like promiscuity and buffer length
• Write packets to savefiles
• Inject packets into an interface

See examples for usage.

Building

As of 0.8.0 this crate uses Rust 2018 and requires a compiler version >= 1.40.0.

As of 0.9.0 the capture-stream feature requires a compiler version >= 1.45.0.

Windows

Install WinPcap.

Download the WinPcap Developer's Pack. Add the /Lib or /Lib/x64 folder to your LIB environment variable.

Linux

On Debian based Linux, install libpcap-dev. If not running as root, you need to set capabilities like so: sudo setcap cap_net_raw,cap_net_admin=eip path/to/bin

Mac OS X

libpcap should be installed on Mac OS X by default.

Note: A timeout of zero may cause pcap::Capture::next to hang and never return (because it waits for the timeout to expire before returning). This can be fixed by using a non-zero timeout (as the libpcap manual recommends) and calling pcap::Capture::next in a loop.

Library Location

If LIBPCAP_LIBDIR environment variable is set when building the crate, it will be added to the linker search path - this allows linking against a specific libpcap.

Library Version

The crate will automatically try to detect the installed libpcap/wpcap version by loading it during the build and calling pcap_lib_version. If for some reason this is not suitable, you can specify the desired library version by setting the environment variable LIBPCAP_VER to the desired version (e.g. env LIBPCAP_VER=1.5.0). The version number is used to determine which library calls to include in the compilation.

Optional Features

capture-stream

Use the capture-stream feature to enable support for streamed packet captures. This feature is supported only on ubuntu and macosx.

[dependencies]
pcap = { version = "0.9", features = ["capture-stream"] }

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.