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use super::{parse_data_structure, parse_delimiter, parse_string_parameter}; use crate::Event; use crate::FilterPhase; use crate::SubSystem; use crate::TimeVal; use nom::branch::alt; use nom::bytes::streaming::tag; use nom::character::streaming::digit1; use nom::combinator::map_res; use nom::IResult; pub struct ReportEntry { pub version: String, pub timestamp: TimeVal, pub subsystem: SubSystem, pub event: Event, pub session_id: String, } pub struct FilterEntry { pub version: String, pub timestamp: TimeVal, pub subsystem: SubSystem, pub phase: FilterPhase, pub session_id: String, pub token: String, } pub(crate) enum EntryOption { Report(ReportEntry), Filter(FilterEntry), } pub(crate) fn parse_entry(input: &[u8]) -> IResult<&[u8], EntryOption> { let (input, entry) = alt((parse_report_entry_meta, parse_filter_entry_meta))(input)?; Ok((input, entry)) } fn parse_report_entry_meta(input: &[u8]) -> IResult<&[u8], EntryOption> { let (input, _) = tag("report")(input)?; let (input, _) = parse_delimiter(input)?; let (input, entry) = parse_report_entry(input)?; Ok((input, EntryOption::Report(entry))) } fn parse_filter_entry_meta(input: &[u8]) -> IResult<&[u8], EntryOption> { let (input, _) = tag("filter")(input)?; let (input, _) = parse_delimiter(input)?; let (input, entry) = parse_filter_entry(input)?; Ok((input, EntryOption::Filter(entry))) } fn parse_report_entry(input: &[u8]) -> IResult<&[u8], ReportEntry> { let (input, version) = parse_string_parameter(input)?; let (input, _) = parse_delimiter(input)?; let (input, timestamp) = parse_timestamp(input)?; let (input, _) = parse_delimiter(input)?; let (input, subsystem) = parse_data_structure::<SubSystem>(input)?; let (input, _) = parse_delimiter(input)?; let (input, event) = parse_data_structure::<Event>(input)?; let (input, _) = parse_delimiter(input)?; let (input, session_id) = parse_string_parameter(input)?; let entry = ReportEntry { version, timestamp, subsystem, event, session_id, }; Ok((input, entry)) } fn parse_filter_entry(input: &[u8]) -> IResult<&[u8], FilterEntry> { let (input, version) = parse_string_parameter(input)?; let (input, _) = parse_delimiter(input)?; let (input, timestamp) = parse_timestamp(input)?; let (input, _) = parse_delimiter(input)?; let (input, subsystem) = parse_data_structure::<SubSystem>(input)?; let (input, _) = parse_delimiter(input)?; let (input, phase) = parse_data_structure::<FilterPhase>(input)?; let (input, _) = parse_delimiter(input)?; let (input, session_id) = parse_string_parameter(input)?; let (input, _) = parse_delimiter(input)?; let (input, token) = parse_string_parameter(input)?; let entry = FilterEntry { version, timestamp, subsystem, phase, session_id, token, }; Ok((input, entry)) } fn parse_timestamp(input: &[u8]) -> IResult<&[u8], TimeVal> { let (input, sec) = map_res(digit1, |s| String::from_utf8_lossy(s).parse::<i64>())(input)?; let (input, _) = tag(".")(input)?; let (input, usec) = map_res(digit1, |s| { format!("{:0<6}", String::from_utf8_lossy(s)).parse::<i64>() })(input)?; let timestamp = TimeVal { sec, usec }; Ok((input, timestamp)) } #[cfg(test)] mod tests { use super::*; #[test] fn test_report_link_connect() { let input = b"report|0.5|1576146008.06099|smtp-in|link-connect|7641df9771b4ed00|mail.openbsd.org|pass|199.185.178.25:33174|45.77.67.80:25"; let res = parse_entry(input); assert!(res.is_ok()); let (_, res) = res.unwrap(); let res = match res { EntryOption::Report(r) => r, _ => { assert!(false); return; } }; assert_eq!(res.version, String::from("0.5")); assert_eq!( res.timestamp, TimeVal { sec: 1576146008, usec: 60990 } ); assert_eq!(res.subsystem, SubSystem::SmtpIn); assert_eq!(res.event, Event::LinkConnect); assert_eq!(res.session_id, String::from("7641df9771b4ed00")); } }