fix(parsing): Timestamp error handling in dnstap parser

[wooffie]

Summary

After my checks for illegal math I found one more testcase with panic. Now timestamp function returns Result<()> (#23048) and we can feel free to pass some errors outside.

Change Type

• Bug fix
• New feature
• Non-functional (chore, refactoring, docs)
• Performance

Is this a breaking change?

• Yes
• No

How did you test this PR?

Raw testcase:

#[test]
    fn test_raw_crash() {
        let testcase = [
            40, 226, 4, 114, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56,
            56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 77, 48, 96, 96, 96, 96,
            96, 96, 96, 96, 96, 96, 98, 96, 96, 96, 135, 96, 96, 96, 96, 96, 64, 96, 96, 96, 96,
            187, 48, 48, 48, 48, 48, 48, 48, 56, 2, 48, 0,
        ];
        let mut log_event = LogEvent::default();

        let _parse_result = DnstapParser::parse(
            &mut log_event,
            Bytes::copy_from_slice(&testcase),
            DnsParserOptions::default(),
        );


    }

Trace:

thread 'parser::tests::test_raw_crash' panicked at lib/dnstap-parser/src/parser.rs:400:18:
invalid timestamp
stack backtrace:
   0: rust_begin_unwind
             at /rustc/4eb161250e340c8f48f66e2b929ef4a5bed7c181/library/std/src/panicking.rs:692:5
   1: core::panicking::panic_fmt
             at /rustc/4eb161250e340c8f48f66e2b929ef4a5bed7c181/library/core/src/panicking.rs:75:14
   2: core::panicking::panic_display
             at /rustc/4eb161250e340c8f48f66e2b929ef4a5bed7c181/library/core/src/panicking.rs:261:5
   3: core::option::expect_failed
             at /rustc/4eb161250e340c8f48f66e2b929ef4a5bed7c181/library/core/src/option.rs:2024:5
   4: core::option::Option<T>::expect
             at /home/wooffie/.rustup/toolchains/1.85-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/option.rs:933:21
   5: dnstap_parser::parser::DnstapParser::parse_dnstap_message_time
             at ./src/parser.rs:397:29
   6: dnstap_parser::parser::DnstapParser::parse_dnstap_message
             at ./src/parser.rs:231:13
   7: dnstap_parser::parser::DnstapParser::parse
             at ./src/parser.rs:153:25
   8: dnstap_parser::parser::tests::test_raw_crash
             at ./src/parser.rs:1354:29
   9: dnstap_parser::parser::tests::test_raw_crash::{{closure}}
             at ./src/parser.rs:1345:24
  10: core::ops::function::FnOnce::call_once
             at /home/wooffie/.rustup/toolchains/1.85-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:250:5
  11: core::ops::function::FnOnce::call_once
             at /rustc/4eb161250e340c8f48f66e2b929ef4a5bed7c181/library/core/src/ops/function.rs:250:5
             ]

Also can check this behavior by removing changes in function but not remove new testcase.

Does this PR include user facing changes?

• Yes. Please add a changelog fragment based on our guidelines.
• No. A maintainer will apply the "no-changelog" label to this PR.

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References

Additional fix to #23048