1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148

// SPDX-License-Identifier: Apache-2.0

use ethtool::EthtoolError;
use libc::{EEXIST, EPERM};
use netlink_packet_utils::DecodeError;
use serde::Serialize;

#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "snake_case")]
pub enum ErrorKind {
    InvalidArgument,
    NetlinkError,
    NisporBug,
    PermissionDeny,
}

impl std::fmt::Display for ErrorKind {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{self:?}")
    }
}

#[derive(Debug, Clone, Serialize)]
#[non_exhaustive]
pub struct NisporError {
    pub kind: ErrorKind,
    pub msg: String,
}

impl NisporError {
    pub(crate) fn bug(message: String) -> NisporError {
        NisporError {
            kind: ErrorKind::NisporBug,
            msg: message,
        }
    }
    pub(crate) fn permission_deny(message: String) -> NisporError {
        NisporError {
            kind: ErrorKind::PermissionDeny,
            msg: message,
        }
    }
    pub(crate) fn invalid_argument(message: String) -> NisporError {
        NisporError {
            kind: ErrorKind::InvalidArgument,
            msg: message,
        }
    }
}

impl std::fmt::Display for NisporError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.msg)
    }
}

impl std::error::Error for NisporError {
    /* TODO */
}

impl std::convert::From<rtnetlink::Error> for NisporError {
    fn from(e: rtnetlink::Error) -> Self {
        match e {
            rtnetlink::Error::NetlinkError(netlink_err) => {
                match netlink_err.raw_code().abs() {
                    EEXIST => NisporError::bug(format!(
                        "Got netlink EEXIST error: {netlink_err}"
                    )),
                    EPERM => {
                        NisporError::permission_deny(format!("{netlink_err}",))
                    }
                    _ => NisporError::bug(format!(
                        "Got netlink unknown error: code {}, msg: {}",
                        netlink_err.raw_code(),
                        netlink_err,
                    )),
                }
            }
            _ => NisporError {
                kind: ErrorKind::NetlinkError,
                msg: e.to_string(),
            },
        }
    }
}

impl std::convert::From<EthtoolError> for NisporError {
    fn from(e: EthtoolError) -> Self {
        NisporError {
            kind: ErrorKind::NetlinkError,
            msg: e.to_string(),
        }
    }
}

impl std::convert::From<std::ffi::FromBytesWithNulError> for NisporError {
    fn from(e: std::ffi::FromBytesWithNulError) -> Self {
        NisporError {
            kind: ErrorKind::NisporBug,
            msg: format!("FromBytesWithNulError: {e}"),
        }
    }
}

impl std::convert::From<std::str::Utf8Error> for NisporError {
    fn from(e: std::str::Utf8Error) -> Self {
        NisporError {
            kind: ErrorKind::NisporBug,
            msg: format!("Utf8Error: {e}"),
        }
    }
}

impl std::convert::From<DecodeError> for NisporError {
    fn from(e: DecodeError) -> Self {
        NisporError {
            kind: ErrorKind::NetlinkError,
            msg: e.to_string(),
        }
    }
}

impl std::convert::From<std::io::Error> for NisporError {
    fn from(e: std::io::Error) -> Self {
        NisporError {
            kind: ErrorKind::NisporBug,
            msg: e.to_string(),
        }
    }
}

impl std::convert::From<std::net::AddrParseError> for NisporError {
    fn from(e: std::net::AddrParseError) -> Self {
        NisporError {
            kind: ErrorKind::InvalidArgument,
            msg: e.to_string(),
        }
    }
}

impl std::convert::From<mptcp_pm::MptcpPathManagerError> for NisporError {
    fn from(e: mptcp_pm::MptcpPathManagerError) -> Self {
        NisporError {
            kind: ErrorKind::NetlinkError,
            msg: e.to_string(),
        }
    }
}