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

// SPDX-License-Identifier: MIT

use netlink_packet_core::{
    NetlinkDeserializable, NetlinkHeader, NetlinkPayload, NetlinkSerializable,
};
use netlink_packet_utils::{
    traits::{Emitable, ParseableParametrized},
    DecodeError,
};

use crate::{inet, unix, SockDiagBuffer, SOCK_DIAG_BY_FAMILY};

#[derive(Debug, PartialEq, Eq, Clone)]
pub enum SockDiagMessage {
    InetRequest(inet::InetRequest),
    InetResponse(Box<inet::InetResponse>),
    UnixRequest(unix::UnixRequest),
    UnixResponse(Box<unix::UnixResponse>),
}

impl SockDiagMessage {
    pub fn is_inet_request(&self) -> bool {
        matches!(self, SockDiagMessage::InetRequest(_))
    }

    pub fn is_inet_response(&self) -> bool {
        matches!(self, SockDiagMessage::InetResponse(_))
    }
    pub fn is_unix_request(&self) -> bool {
        matches!(self, SockDiagMessage::UnixRequest(_))
    }

    pub fn is_unix_response(&self) -> bool {
        matches!(self, SockDiagMessage::UnixResponse(_))
    }

    pub fn message_type(&self) -> u16 {
        SOCK_DIAG_BY_FAMILY
    }
}

impl Emitable for SockDiagMessage {
    fn buffer_len(&self) -> usize {
        use SockDiagMessage::*;

        match self {
            InetRequest(ref msg) => msg.buffer_len(),
            InetResponse(ref msg) => msg.buffer_len(),
            UnixRequest(ref msg) => msg.buffer_len(),
            UnixResponse(ref msg) => msg.buffer_len(),
        }
    }

    fn emit(&self, buffer: &mut [u8]) {
        use SockDiagMessage::*;

        match self {
            InetRequest(ref msg) => msg.emit(buffer),
            InetResponse(ref msg) => msg.emit(buffer),
            UnixRequest(ref msg) => msg.emit(buffer),
            UnixResponse(ref msg) => msg.emit(buffer),
        }
    }
}

impl NetlinkSerializable for SockDiagMessage {
    fn message_type(&self) -> u16 {
        self.message_type()
    }

    fn buffer_len(&self) -> usize {
        <Self as Emitable>::buffer_len(self)
    }

    fn serialize(&self, buffer: &mut [u8]) {
        self.emit(buffer)
    }
}

impl NetlinkDeserializable for SockDiagMessage {
    type Error = DecodeError;
    fn deserialize(
        header: &NetlinkHeader,
        payload: &[u8],
    ) -> Result<Self, Self::Error> {
        let buffer = SockDiagBuffer::new_checked(&payload)?;
        SockDiagMessage::parse_with_param(&buffer, header.message_type)
    }
}

impl From<SockDiagMessage> for NetlinkPayload<SockDiagMessage> {
    fn from(message: SockDiagMessage) -> Self {
        NetlinkPayload::InnerMessage(message)
    }
}