Function ppp::parse_v2_header

pub fn parse_v2_header(input: &[u8]) -> ParseResult<&[u8]>

Parse the first 16 bytes of the protocol header; the only required payload. The 12 byte signature and 4 bytes used to describe the connection and header information.

Examples

TCP over IPv6 with some TLVs

let mut input: Vec<u8> = Vec::new();

input.extend_from_slice(b"\r\n\r\n\0\r\nQUIT\n");
input.push(0x21);
input.push(0x21);
input.extend(&[0, 45]);
input.extend(&[0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]);
input.extend(&[0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xF1]);
input.extend(&[0, 80]);
input.extend(&[1, 187]);
input.extend(&[1, 0, 1, 5]);
input.extend(&[2, 0, 2, 5, 5]);
input.extend(&[1, 1, 1]);

assert_eq!(ppp::parse_v2_header(&input[..]), Ok((&[1, 1, 1][..], ppp::model::Header::new(
    ppp::model::Version::Two,
    ppp::model::Command::Proxy,
    ppp::model::Protocol::Stream,
    vec![ppp::model::Tlv::new(1, vec![5]), ppp::model::Tlv::new(2, vec![5, 5])],
    (
        [0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF],
        [0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFF1],
        80,
        443
    ).into(),
))))

UDP over IPv4 with some TLVs

let mut input: Vec<u8> = Vec::new();

input.extend_from_slice(b"\r\n\r\n\0\r\nQUIT\n");
input.push(0x20);
input.push(0x12);
input.extend(&[0, 21]);
input.extend(&[127, 0, 0, 1]);
input.extend(&[192, 168, 1, 1]);
input.extend(&[0, 80]);
input.extend(&[1, 187]);
input.extend(&[1, 0, 1, 5]);
input.extend(&[2, 0, 2, 5, 5]);
input.extend(&[1, 2, 3, 4, 5]);

assert_eq!(ppp::parse_v2_header(&input[..]), Ok((&[1, 2, 3, 4, 5][..], ppp::model::Header::new(
    ppp::model::Version::Two,
    ppp::model::Command::Local,
    ppp::model::Protocol::Datagram,
    vec![ppp::model::Tlv::new(1, vec![5]), ppp::model::Tlv::new(2, vec![5, 5])],
    ([127, 0, 0, 1], [192, 168, 1, 1], 80, 443).into(),
))))

Stream over Unix with some TLVs

let mut input: Vec<u8> = Vec::new();

input.extend_from_slice(b"\r\n\r\n\0\r\nQUIT\n");
input.push(0x20);
input.push(0x31);
input.extend(&[0, 225]);
input.extend(&[0xFFu8; 108][..]);
input.extend(&[0xAAu8; 108][..]);
input.extend(&[1, 0, 1, 5]);
input.extend(&[2, 0, 2, 5, 5]);
input.extend(&[1, 2, 3, 4, 5]);

assert_eq!(ppp::parse_v2_header(&input[..]), Ok((&[1, 2, 3, 4, 5][..], ppp::model::Header::new(
    ppp::model::Version::Two,
    ppp::model::Command::Local,
    ppp::model::Protocol::Stream,
    vec![ppp::model::Tlv::new(1, vec![5]), ppp::model::Tlv::new(2, vec![5, 5])],
    ([0xFFFFFFFFu32; 27], [0xAAAAAAAAu32; 27]).into(),
))))

Unspecified protocol over IPv6 with some TLVs

let mut input: Vec<u8> = Vec::new();

input.extend_from_slice(b"\r\n\r\n\0\r\nQUIT\n");
input.push(0x21);
input.push(0x20);
input.extend(&[0, 41]);
input.extend(&[0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]);
input.extend(&[0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xF1]);
input.extend(&[1, 0, 1, 5]);
input.extend(&[2, 0, 2, 5, 5]);
input.extend(&[42]);

assert_eq!(ppp::parse_v2_header(&input[..]), Ok((&[42][..], ppp::model::Header::new(
    ppp::model::Version::Two,
    ppp::model::Command::Proxy,
    ppp::model::Protocol::Unspecified,
    vec![ppp::model::Tlv::new(1, vec![5]), ppp::model::Tlv::new(2, vec![5, 5])],
    (
        [0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF],
        [0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFF1]
    ).into()
))))