etherparse/err/ipv6_exts/
header_read_error.rs

1use super::HeaderError;
2
3/// Error when decoding IPv6 extension headers via a `std::io::Read` source.
4#[cfg(feature = "std")]
5#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
6#[derive(Debug)]
7pub enum HeaderReadError {
8    /// IO error was encountered while reading header.
9    Io(std::io::Error),
10
11    /// Error caused by the contents of the header.
12    Content(HeaderError),
13}
14
15#[cfg(feature = "std")]
16#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
17impl HeaderReadError {
18    /// Returns the `std::io::Error` value if the `HeaderReadError` is `Io`.
19    /// Otherwise `None` is returned.
20    #[inline]
21    pub fn io_error(self) -> Option<std::io::Error> {
22        use HeaderReadError::*;
23        match self {
24            Io(value) => Some(value),
25            _ => None,
26        }
27    }
28
29    /// Returns the `err::ipv6_exts::HeaderError` value if the `HeaderReadError` is `Content`.
30    /// Otherwise `None` is returned.
31    #[inline]
32    pub fn content_error(self) -> Option<HeaderError> {
33        use HeaderReadError::*;
34        match self {
35            Content(value) => Some(value),
36            _ => None,
37        }
38    }
39}
40
41#[cfg(feature = "std")]
42#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
43impl core::fmt::Display for HeaderReadError {
44    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
45        use HeaderReadError::*;
46        match self {
47            Io(err) => write!(f, "IPv6 Extension Header IO Error: {}", err),
48            Content(value) => value.fmt(f),
49        }
50    }
51}
52
53#[cfg(feature = "std")]
54#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
55impl std::error::Error for HeaderReadError {
56    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
57        use HeaderReadError::*;
58        match self {
59            Io(err) => Some(err),
60            Content(err) => Some(err),
61        }
62    }
63}
64
65#[cfg(all(test, feature = "std"))]
66mod test {
67    use super::{HeaderReadError::*, *};
68    use alloc::format;
69
70    #[test]
71    fn debug() {
72        let err = HeaderError::HopByHopNotAtStart;
73        assert_eq!(
74            format!("Content({:?})", err.clone()),
75            format!("{:?}", Content(err))
76        );
77    }
78
79    #[test]
80    fn fmt() {
81        {
82            let err = std::io::Error::new(
83                std::io::ErrorKind::UnexpectedEof,
84                "failed to fill whole buffer",
85            );
86            assert_eq!(
87                format!("IPv6 Extension Header IO Error: {}", err),
88                format!("{}", Io(err))
89            );
90        }
91        {
92            let err = HeaderError::HopByHopNotAtStart;
93            assert_eq!(format!("{}", &err), format!("{}", Content(err.clone())));
94        }
95    }
96
97    #[test]
98    fn source() {
99        use std::error::Error;
100        assert!(Io(std::io::Error::new(
101            std::io::ErrorKind::UnexpectedEof,
102            "failed to fill whole buffer",
103        ))
104        .source()
105        .is_some());
106        assert!(Content(HeaderError::HopByHopNotAtStart).source().is_some());
107    }
108
109    #[test]
110    fn io_error() {
111        assert!(Io(std::io::Error::new(
112            std::io::ErrorKind::UnexpectedEof,
113            "failed to fill whole buffer",
114        ))
115        .io_error()
116        .is_some());
117        assert!(Content(HeaderError::HopByHopNotAtStart)
118            .io_error()
119            .is_none());
120    }
121
122    #[test]
123    fn content_error() {
124        assert_eq!(
125            None,
126            Io(std::io::Error::new(
127                std::io::ErrorKind::UnexpectedEof,
128                "failed to fill whole buffer",
129            ))
130            .content_error()
131        );
132        {
133            let err = HeaderError::HopByHopNotAtStart;
134            assert_eq!(Some(err.clone()), Content(err.clone()).content_error());
135        }
136    }
137}
etherparse/err/ipv6_exts/header_read_error.rs

etherparse/err/ipv6_exts/
header_read_error.rs
