frameassembly 1.4.2

Offline, rootless PCAP generator & Packets-as-Code DSL: generate deterministic .pcap/.pcapng from text across 81 protocols for Wireshark, tcpreplay & IDS.
Documentation 
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//! IEEE 802.3ad Link Aggregation Control Protocol (`LACP`) PDU parser for FrameAssembly.
//!
//! This module implements the winnow parser combinator for `LACP` link aggregation control frames.
//! It parses actor and partner system MAC addresses (`ACTOR_SYS`, `PARTNER_SYS`), operational keys
//! (`ACTOR_KEY`, `PARTNER_KEY`), port identifiers (`ACTOR_PORT`, `PARTNER_PORT`), and state bitmask
//! bytes (`ACTOR_STATE`, `PARTNER_STATE`) into spanned [`ParsedField`] nodes.

use winnow::ModalResult as PResult;
use winnow::combinator::{alt, cut_err};
use winnow::prelude::*;

use crate::ast::*;
use crate::lexer::Token;
use crate::parser::{ParsedField, Stream, parse_mac, parse_u8, parse_u16, tag};

/// Parses an LACP protocol declaration or field.
pub(crate) fn parse_lacp_field<'i, 'a>(input: &mut Stream<'i, 'a>) -> PResult<ParsedField<'a>> {
    alt((
        tag(Token::Lacp).map(|(_, s)| ParsedField::Protocol(Protocol::Lacp, (s.start, s.len()))),
        (tag(Token::ActorSys), cut_err(parse_mac))
            .map(|((_, s), v)| ParsedField::ActorSys(v, (s.start, s.end - s.start))),
        (tag(Token::ActorKey), cut_err(parse_u16))
            .map(|((_, s), v)| ParsedField::ActorKey(v, (s.start, s.end - s.start))),
        (tag(Token::ActorPort), cut_err(parse_u16))
            .map(|((_, s), v)| ParsedField::ActorPort(v, (s.start, s.end - s.start))),
        (tag(Token::PartnerSys), cut_err(parse_mac))
            .map(|((_, s), v)| ParsedField::PartnerSys(v, (s.start, s.end - s.start))),
        (tag(Token::PartnerKey), cut_err(parse_u16))
            .map(|((_, s), v)| ParsedField::PartnerKey(v, (s.start, s.end - s.start))),
        (tag(Token::PartnerPort), cut_err(parse_u16))
            .map(|((_, s), v)| ParsedField::PartnerPort(v, (s.start, s.end - s.start))),
        (tag(Token::ActorState), cut_err(parse_u8))
            .map(|((_, s), v)| ParsedField::ActorState(v, (s.start, s.end - s.start))),
        (tag(Token::PartnerState), cut_err(parse_u8))
            .map(|((_, s), v)| ParsedField::PartnerState(v, (s.start, s.end - s.start))),
    ))
    .parse_next(input)
}