[package]
name = "punktfunk-core"
description = "punktfunk shared protocol/transport/FEC core, exposed over a stable C ABI"
version.workspace = true
edition.workspace = true
rust-version.workspace = true
license.workspace = true
authors.workspace = true
repository.workspace = true

[lib]
name = "punktfunk_core"
# `lib`       — so punktfunk-host / punktfunk-client-rs / tools link it as a normal Rust crate.
# `staticlib` — `libpunktfunk_core.a` for the C test harness and static embedding.
# `cdylib`    — `libpunktfunk_core.{so,dylib}` for Swift/Kotlin clients via the C ABI.
crate-type = ["lib", "cdylib", "staticlib"]

[features]
default = []
# Control-plane QUIC (pairing, config, reverse audio). tokio is permitted ONLY here,
# never on the per-frame hot path. Off by default so the core stays runtime-free.
quic = ["dep:quinn", "dep:tokio", "dep:rustls", "dep:rcgen", "dep:rustls-pki-types", "dep:sha2", "dep:hmac", "dep:spake2"]

[dependencies]
reed-solomon-simd = "3.1"      # GF(2^16) Leopard-RS, SIMD, O(n log n) — the wall-breaker (P2)
# Vendored fork of fec-rs: GF(2^8) classic RS with the *Cauchy* generator matrix
# (M[j][i] = inv[(m+i)^j]) — byte-identical to the `nanors` library Moonlight uses, so our
# parity is decodable by a stock Moonlight client. (reed-solomon-erasure is Vandermonde and is
# NOT interoperable.) See vendor/fec-rs/LICENSE (BSD-2-Clause).
fec-rs = { path = "vendor/fec-rs" }
aes-gcm = "0.10"               # AES-128-GCM session crypto, matches GameStream
zerocopy = { version = "0.8", features = ["derive"] }
bytes = "1"
socket2 = "0.6"                # set SO_SNDBUF/SO_RCVBUF — default UDP buffers are too small for 4K/5K frame bursts
thiserror = "2"
tracing = { version = "0.1", default-features = false, features = ["std"] }
rand = "0.9"
zeroize = "1"

quinn = { version = "0.11", optional = true }
rustls = { version = "0.23", optional = true, default-features = false, features = ["ring", "std"] }
rcgen = { version = "0.13", optional = true, default-features = false, features = ["aws_lc_rs", "pem"] }
rustls-pki-types = { version = "1", optional = true }
sha2 = { version = "0.10", optional = true }
hmac = { version = "0.12", optional = true }
spake2 = { version = "0.4", optional = true }
tokio = { version = "1", optional = true, features = ["rt-multi-thread", "net", "sync", "macros"] }

# `libc` for batched UDP syscalls: `sendmmsg`/`recvmmsg` on Linux (the 1 Gbps+ lever) and the
# `recv(MSG_DONTWAIT)` drain on the other unix (Apple/BSD) targets, which have no `recvmmsg`
# (see transport/udp.rs `recv_batch`). Needed on every unix target — non-unix (Windows) uses
# the scalar fallbacks. Cross-compiles (iOS/tvOS) don't pull libc transitively the way the
# macOS host build does, so it must be a direct dep here or those slices fail to link `libc::`.
[target.'cfg(unix)'.dependencies]
libc = "0.2"

[dev-dependencies]
proptest = "1"

[build-dependencies]
cbindgen = "0.29"