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

/*!
Provides parsing for BMP and OpenBMP binary-formatted messages.
*/
use crate::parser::bmp::error::ParserBmpError;
use crate::parser::bmp::messages::*;
pub use crate::parser::bmp::openbmp::parse_openbmp_header;
use crate::utils::ReadUtils;
use bytes::Bytes;

pub mod error;
pub mod messages;
pub mod openbmp;

/// Parse OpenBMP `raw_bmp` message.
///
/// An OpenBMP `raw_bmp` message contains a [OpenBmpHeader][OpenBmpHeader] and a [BmpMessage].
///
/// [OpenBmpHeader]: crate::parser::bmp::openbmp::OpenBmpHeader
pub fn parse_openbmp_msg(mut data: Bytes) -> Result<BmpMessage, ParserBmpError> {
    let _header = parse_openbmp_header(&mut data)?;
    parse_bmp_msg(&mut data)
}

/// Parse a BMP message.
pub fn parse_bmp_msg(data: &mut Bytes) -> Result<BmpMessage, ParserBmpError> {
    let common_header = parse_bmp_common_header(data)?;

    let content_length = common_header.msg_len as usize - 6;
    data.has_n_remaining(content_length)?;
    let mut content = data.split_to(content_length);

    // if total_len>common_header.msg_len {
    //     // truncated message
    //     let diff = total_len - common_header.msg_len;
    //     let bytes_left = reader.get_ref().len() as u32 - reader.position() as u32;
    //     buffer = Vec::with_capacity((bytes_left - diff) as usize);
    // } else if total_len == common_header.msg_len {
    // } else {
    //     return Err(ParserBmpError::CorruptedBmpMessage)
    // };
    // reader.read_exact(&mut buffer)?;

    match &common_header.msg_type {
        BmpMsgType::RouteMonitoring => {
            let per_peer_header = parse_per_peer_header(&mut content)?;
            let msg = parse_route_monitoring(&mut content, &per_peer_header.asn_length())?;
            Ok(BmpMessage {
                common_header,
                per_peer_header: Some(per_peer_header),
                message_body: MessageBody::RouteMonitoring(msg),
            })
        }
        BmpMsgType::RouteMirroringMessage => {
            let per_peer_header = parse_per_peer_header(&mut content)?;
            let msg = parse_route_mirroring(&mut content, &per_peer_header.asn_length())?;
            Ok(BmpMessage {
                common_header,
                per_peer_header: Some(per_peer_header),
                message_body: MessageBody::RouteMirroring(msg),
            })
        }
        BmpMsgType::StatisticsReport => {
            let per_peer_header = parse_per_peer_header(&mut content)?;
            let msg = parse_stats_report(&mut content)?;
            Ok(BmpMessage {
                common_header,
                per_peer_header: Some(per_peer_header),
                message_body: MessageBody::StatsReport(msg),
            })
        }
        BmpMsgType::PeerDownNotification => {
            let per_peer_header = parse_per_peer_header(&mut content)?;
            let msg = parse_peer_down_notification(&mut content)?;
            Ok(BmpMessage {
                common_header,
                per_peer_header: Some(per_peer_header),
                message_body: MessageBody::PeerDownNotification(msg),
            })
        }
        BmpMsgType::PeerUpNotification => {
            let per_peer_header = parse_per_peer_header(&mut content)?;
            let msg = parse_peer_up_notification(
                &mut content,
                &per_peer_header.afi(),
                &per_peer_header.asn_length(),
            )?;
            Ok(BmpMessage {
                common_header,
                per_peer_header: Some(per_peer_header),
                message_body: MessageBody::PeerUpNotification(msg),
            })
        }
        BmpMsgType::InitiationMessage => {
            let msg = parse_initiation_message(&mut content)?;
            Ok(BmpMessage {
                common_header,
                per_peer_header: None,
                message_body: MessageBody::InitiationMessage(msg),
            })
        }
        BmpMsgType::TerminationMessage => {
            let msg = parse_termination_message(&mut content)?;
            Ok(BmpMessage {
                common_header,
                per_peer_header: None,
                message_body: MessageBody::TerminationMessage(msg),
            })
        }
    }
}

#[cfg(test)]
#[allow(unused_variables)]
mod tests {
    use super::*;
    use crate::parser::bmp::openbmp::parse_openbmp_header;

    #[test]
    fn test_peer_down_notification() {
        let input = "4f424d500107006400000033800c6184b9c2000c602cbf4f072f3ae149d23486024bc3dadfc4000a69732d63632d626d7031c677060bdd020a9e92be000200de2e3180df3369000000000000000000000000000c726f7574652d76696577733500000001030000003302000000000000000000000000000000000000000000003fda060e00000da30000000061523c36000c0e1c0200000a";
        let decoded = hex::decode(input).unwrap();
        let mut data = Bytes::from(decoded);
        let _header = parse_openbmp_header(&mut data).unwrap();
        let _msg = parse_bmp_msg(&mut data).unwrap();
    }

    #[test]
    fn test_route_monitoring() {
        let input = "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";
        let decoded = hex::decode(input).unwrap();
        let mut data = Bytes::from(decoded);
        let _header = parse_openbmp_header(&mut data).unwrap();
        let _msg = parse_bmp_msg(&mut data).unwrap();
    }

    #[test]
    fn parse_peer_up_notification() {}
}