6 releases
0.2.1 | Oct 15, 2024 |
---|---|
0.2.0 | Sep 17, 2024 |
0.1.3 | Mar 23, 2023 |
#1262 in Network programming
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780KB
17K
SLoC
pkts
pkts - create, decode and modify network packet layers
pkts
provides ergonomic, no-std
-friendly APIs for handling packets from a diverse range of
network protocols. It provides intuitive abstractions for handling packets that span multiple
protocol layers, and aims to be as easy to use as scapy
(a Python packet parsing framework)
while also offering performant zero-allocation APIs suitable for embedded networking firmware.
unsafe
code is explicitly forbidden in the library, but we're well aware this doesn't guarantee
the absence of potential Denial of Service threat vectors via panic
s; as such, we're working on
integrating both fuzzing and symbolic model checking to test the correctness of packet parsing
implementations.
For those looking for packet capture/transmission functionality (similar to what libpcap
or
scapy
offer), the rscap
crate provides cross-platform and rust-native APIs for such that
integrate well with pkts
.
Features
- Robust APIs for building/modifying packets:
pkts
provides simple operations to combine various layers into a single packet, and to index into a different layers of a packet to retrieve or modify fields. Users ofscapy
may find the API surprisingly familiar, especially for layer composition and indexing operations:
use layers::{ip::Ipv4, tcp::Tcp};
let pkt = Ip::new() / Tcp::new();
pkt[Tcp].set_sport(80);
pkt[Tcp].set_dport(12345);
no-std
Compatible: every packet type in thepkts
crate can be used without the standard library, and a specialLayerRef
type can be used to access raw packet bytes without any allocations. Packets can additionally be constructed from scratch inno-std
environments using allocation-freeBuilder
patterns.- Packet defragmentation/reordering: In some protocols, packets may be fragmented (such as IPv4)
or arrive out-of-order (TCP, SCTP, etc.).
pkts
overcomes both of these issues throughSequence
types that transparently handle defragmentation and reordering.Sequence
types can even be stacked so that application-layer data can easily be reassembled from captured packets. They even work inno-std
environments with or without an allocator. - Stateful packet support: Many network protocols are stateful, and interpreting packets from
such protocols can be difficult (if not impossible) to accomplish unless information about the
protocol session is stored.
pkts
providesSession
types that handle these kinds of packets--Session
s ensure that packets are validated based on the current expected state of the protocol. Just likeSequence
types,Session
types are compatible withno-std
/no-alloc
environments.
Dependency Policy
Like other crates managed by pkts.org, pkts
aims to rely on a minimal set of dependencies
that are vetted and well-used in the Rust ecosystem. As such, pkts
makes use of only the
following dependencies:
bitflags
- Provides a simple, clean interface for accessing and modifying bitfields in packets. Used extensively in the rust ecosystem (e.g. byrustix
,openssl
,bindgen
, etc.)pkts-macros
- Procedural macros used bypkts
; nested dependencies are onlysyn
andquote
.pkts-common
- Shared data types/methods forpkts
and other crates; no nested dependencies.
We do not plan on adding in any additional dependencies to pkts
in future releases, with the
exception of submodule libraries that break off individual pieces of functionality from pkts
and
are maintained by pkts.org.
License
This project is licensed under either of
at your option.
Contributing
pkts
is open to contribution--feel free to submit an issue or pull request if there's
something you'd like to add to the library.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in
pkts
by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without
any additional terms or conditions.
Dependencies
~1.5MB
~39K SLoC