frameassembly 1.4.5

A DSL for creating custon .pcap files for testing firewalls, IDS rules, SNMP traps and pentesting.
Documentation 
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//! Internet Message Access Protocol (IMAP4rev1) Layer 7 mailbox access field parser.
//!
//! This module implements the `winnow` parser combinator for RFC 3501 `IMAP` client commands and
//! server responses in FrameAssembly `.fasm` specifications. It recognizes the `IMAP` protocol
//! keyword, command correlation tags (`TAG`, e.g., `"A001"` or `"*"`), command verbs (`CMD`),
//! command arguments (`ARG`), completion status strings (`STATUS`, e.g., `"OK"`, `"NO"`, `"BAD"`),
//! and server response text (`RESPONSE`).

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

use crate::ast::*;
use crate::lexer::Token;
use crate::parser::{parse_any_str, parse_str_val, tag, ParsedField, Stream};

/// Parses an IMAP protocol declaration or mailbox field.
pub(crate) fn parse_imap_field<'i, 'a>(input: &mut Stream<'i, 'a>) -> PResult<ParsedField<'a>> {
    alt((
        tag(Token::Imap).map(|(_, s)| ParsedField::Protocol(Protocol::Imap, (s.start, s.len()))),
        (tag(Token::Tag), parse_str_val)
            .map(|((_, s), v)| ParsedField::TagVal(None, Some(v), (s.start, s.end - s.start))),
        (tag(Token::Cmd), cut_err(parse_any_str))
            .map(|((_, s), v)| ParsedField::L7StringField("CMD", v, (s.start, s.end - s.start))),
        (tag(Token::Arg), cut_err(parse_str_val))
            .map(|((_, s), v)| ParsedField::L7StringField("ARG", v, (s.start, s.end - s.start))),
        (tag(Token::Status), parse_any_str)
            .map(|((_, s), v)| ParsedField::L7StringField("STATUS", v, (s.start, s.end - s.start))),
        (tag(Token::Response), parse_str_val).map(|((_, s), v)| {
            ParsedField::L7StringField("RESPONSE", v, (s.start, s.end - s.start))
        }),
    ))
    .parse_next(input)
}