<commit_before>use std::io::net::ip::{Ipv4Addr, SocketAddr};

mod libtorresmo {
    extern crate time;

    use std::io::net::udp::UdpSocket;
    use std::io::net::ip::SocketAddr;
    use std::io::IoResult;
    use std::mem::transmute;
    use std::rand::random;
    use std::fmt;

    #[allow(dead_code,non_camel_case_types)]
    enum UtpPacketType {
        ST_DATA  = 0,
        ST_FIN   = 1,
        ST_STATE = 2,
        ST_RESET = 3,
        ST_SYN   = 4,
    }

    impl fmt::Show for UtpPacketType {
        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
            let s = match *self {
                ST_DATA  => "ST_DATA",
                ST_FIN   => "ST_FIN",
                ST_STATE => "ST_STATE",
                ST_RESET => "ST_RESET",
                ST_SYN   => "ST_SYN",
            };
            write!(f, "{}", s)
        }
    }

    #[allow(dead_code)]
    #[packed]
    struct UtpPacketHeader {
        type_ver: u8, // type: u4, ver: u4
        extension: u8,
        connection_id: u16,
        timestamp_microseconds: u32,
        timestamp_difference_microseconds: u32,
        wnd_size: u32,
        seq_nr: u16,
        ack_nr: u16,
    }

    impl UtpPacketHeader {
        fn bytes(&self) -> &[u8] {
            unsafe {
                let buf: &[u8, ..20] = transmute(self);
                return buf.as_slice();
            }
        }

        fn len(&self) -> uint {
            static HEADER_SIZE: uint = 20;
            return HEADER_SIZE;
        }
    }

    impl fmt::Show for UtpPacketHeader {
        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
            let t: UtpPacketType = unsafe { transmute(self.type_ver >> 4) };
            let ptype = match t {
                ST_DATA  => "ST_DATA",
                ST_FIN   => "ST_FIN",
                ST_STATE => "ST_STATE",
                ST_RESET => "ST_RESET",
                ST_SYN   => "ST_SYN",
            };
            write!(f, "(type: {}, version: {}, extension: {}, connection_id: {}, timestamp_microseconds: {}, timestamp_difference_microseconds: {}, wnd_size: {}, seq_nr: {}, ack_nr: {})", ptype, self.type_ver & 0x0F, self.extension, self.connection_id, self.timestamp_microseconds, self.timestamp_difference_microseconds, self.wnd_size, self.seq_nr, self.ack_nr)
        }
    }

    #[allow(dead_code)]
    struct UtpPacket {
        header: UtpPacketHeader,
        payload: Vec<u8>,
    }

    impl UtpPacket {
        /// Constructs a new, empty UtpPacket.
        fn new() -> UtpPacket {
            UtpPacket {
                header: UtpPacketHeader {
                    type_ver: ST_DATA as u8 << 4 | 1,
                    extension: 0,
                    connection_id: 0,
                    timestamp_microseconds: 0,
                    timestamp_difference_microseconds: 0,
                    wnd_size: 0,
                    seq_nr: 0,
                    ack_nr: 0,
                },
                payload: Vec::new(),
            }
        }

        fn set_type(&mut self, t: UtpPacketType) {
            let version = 0x0F & self.header.type_ver;
            self.header.type_ver = t as u8 << 4 | version;
        }

        fn bytes(&self) -> Vec<u8> {
            let mut buf: Vec<u8> = Vec::with_capacity(self.len());
            buf.push_all(self.header.bytes());
            buf.push_all(self.payload.as_slice());
            return buf;
        }

        fn len(&self) -> uint {
            self.header.len() + self.payload.len()
        }
<commit_msg>Add getter and setter for packet header type.<commit_after>use std::io::net::ip::{Ipv4Addr, SocketAddr};

mod libtorresmo {
    extern crate time;

    use std::io::net::udp::UdpSocket;
    use std::io::net::ip::SocketAddr;
    use std::io::IoResult;
    use std::mem::transmute;
    use std::rand::random;
    use std::fmt;

    #[allow(dead_code,non_camel_case_types)]
    enum UtpPacketType {
        ST_DATA  = 0,
        ST_FIN   = 1,
        ST_STATE = 2,
        ST_RESET = 3,
        ST_SYN   = 4,
    }

    impl fmt::Show for UtpPacketType {
        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
            let s = match *self {
                ST_DATA  => "ST_DATA",
                ST_FIN   => "ST_FIN",
                ST_STATE => "ST_STATE",
                ST_RESET => "ST_RESET",
                ST_SYN   => "ST_SYN",
            };
            write!(f, "{}", s)
        }
    }

    #[allow(dead_code)]
    #[packed]
    struct UtpPacketHeader {
        type_ver: u8, // type: u4, ver: u4
        extension: u8,
        connection_id: u16,
        timestamp_microseconds: u32,
        timestamp_difference_microseconds: u32,
        wnd_size: u32,
        seq_nr: u16,
        ack_nr: u16,
    }

    impl UtpPacketHeader {
        fn set_type(&mut self, t: UtpPacketType) {
            let version = 0x0F & self.type_ver;
            self.type_ver = t as u8 << 4 | version;
        }

        fn get_type(self) -> UtpPacketType {
            let t: UtpPacketType = unsafe { transmute(self.type_ver >> 4) };
            t
        }

        fn bytes(&self) -> &[u8] {
            unsafe {
                let buf: &[u8, ..20] = transmute(self);
                return buf.as_slice();
            }
        }

        fn len(&self) -> uint {
            static HEADER_SIZE: uint = 20;
            return HEADER_SIZE;
        }
    }

    impl fmt::Show for UtpPacketHeader {
        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
            let t: UtpPacketType = self.get_type();
            write!(f, "(type: {}, version: {}, extension: {}, connection_id: {}, timestamp_microseconds: {}, timestamp_difference_microseconds: {}, wnd_size: {}, seq_nr: {}, ack_nr: {})", t, self.type_ver & 0x0F, self.extension, self.connection_id, self.timestamp_microseconds, self.timestamp_difference_microseconds, self.wnd_size, self.seq_nr, self.ack_nr)
        }
    }

    #[allow(dead_code)]
    struct UtpPacket {
        header: UtpPacketHeader,
        payload: Vec<u8>,
    }

    impl UtpPacket {
        /// Constructs a new, empty UtpPacket.
        fn new() -> UtpPacket {
            UtpPacket {
                header: UtpPacketHeader {
                    type_ver: ST_DATA as u8 << 4 | 1,
                    extension: 0,
                    connection_id: 0,
                    timestamp_microseconds: 0,
                    timestamp_difference_microseconds: 0,
                    wnd_size: 0,
                    seq_nr: 0,
                    ack_nr: 0,
                },
                payload: Vec::new(),
            }
        }

        fn set_type(&mut self, t: UtpPacketType) {
            self.header.set_type(t);
        }

        fn get_type(self) -> UtpPacketType {
            self.header.get_type()
        }

        fn bytes(&self) -> Vec<u8> {
            let mut buf: Vec<u8> = Vec::with_capacity(self.len());
            buf.push_all(self.header.bytes());
            buf.push_all(self.payload.as_slice());
            return buf;
        }

        fn len(&self) -> uint {
            self.header.len() + self.payload.len()
        }

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