smb 0.4.0

A Pure Rust SMB Client implementation
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use super::{super::guid::Guid, FileId};
use binrw::prelude::*;
use modular_bitfield::prelude::*;

#[binrw::binrw]
#[derive(Debug, PartialEq, Eq)]
pub struct OplockBreakMsg {
    #[bw(calc = 24)]
    #[br(assert(_structure_size == 24))]
    _structure_size: u16,
    oplock_level: u8,
    #[bw(calc = 0)]
    #[br(assert(_reserved == 0))]
    _reserved: u8,
    #[bw(calc = 0)]
    #[br(assert(reserved2 == 0))]
    reserved2: u32,
    file_id: FileId,
}

#[binrw::binrw]
#[derive(Debug, PartialEq, Eq)]
pub struct LeaseBreakNotify {
    #[bw(calc = 44)]
    #[br(assert(_structure_size == 44))]
    _structure_size: u16,
    new_epoch: u16,
    ack_required: u32,
    lease_key: Guid,
    current_lease_state: LeaseState,
    new_lease_state: LeaseState,
    #[bw(calc = 0)]
    #[br(assert(break_reason == 0))]
    break_reason: u32,
    #[bw(calc = 0)]
    #[br(assert(access_mask_hint == 0))]
    access_mask_hint: u32,
    #[bw(calc = 0)]
    #[br(assert(share_mask_hint == 0))]
    share_mask_hint: u32,
}

#[binrw::binrw]
#[derive(Debug, PartialEq, Eq)]
#[brw(repr(u8))]
pub enum OplockLevel {
    None = 0,
    II = 1,
    Exclusive = 2,
}

#[bitfield]
#[derive(BinWrite, BinRead, Debug, Clone, Copy, PartialEq, Eq)]
#[bw(map = |&x| Self::into_bytes(x))]
pub struct LeaseState {
    pub read_caching: bool,
    pub handle_caching: bool,
    pub write_caching: bool,
    #[skip]
    __: B29,
}

// Those are all the same.
pub type OplockBreakNotify = OplockBreakMsg;
pub type OplockBreakAck = OplockBreakMsg;
pub type OplockBreakResponse = OplockBreakMsg;

#[binrw::binrw]
#[derive(Debug, PartialEq, Eq)]
pub struct LeaseBreakAckResponse {
    #[bw(calc = 36)]
    #[br(assert(_structure_size == 36))]
    _structure_size: u16,
    #[bw(calc = 0)]
    #[br(assert(_reserved == 0))]
    _reserved: u16,
    #[bw(calc = 0)] // reserved
    #[br(assert(flags == 0))]
    flags: u32,
    lease_key: Guid,
    lease_state: LeaseState,
    #[bw(calc = 0)] // reserved
    #[br(assert(lease_duration == 0))]
    lease_duration: u64,
}

// Those are the same.
pub type LeaseBreakAck = LeaseBreakAckResponse;
pub type LeaseBreakResponse = LeaseBreakAckResponse;

#[cfg(test)]
mod tests {
    use crate::packets::smb2::*;
    use std::io::Cursor;

    use super::*;
    #[test]
    pub fn test_lease_break_notify_parses() {
        let data = [
            0x2c, 0x0, 0x2, 0x0, 0x1, 0x0, 0x0, 0x0, 0x9e, 0x61, 0xc8, 0x70, 0x5d, 0x16, 0x5e,
            0x31, 0xd4, 0x92, 0xa0, 0x1b, 0xc, 0xbb, 0x3a, 0xf2, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
            0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
        ];

        let parsed = LeaseBreakNotify::read_le(&mut Cursor::new(&data)).unwrap();
        assert_eq!(
            parsed,
            LeaseBreakNotify {
                new_epoch: 2,
                ack_required: 1,
                lease_key: "70c8619e-165d-315e-d492-a01b0cbb3af2".parse().unwrap(),
                current_lease_state: LeaseState::new()
                    .with_read_caching(true)
                    .with_handle_caching(true),
                new_lease_state: LeaseState::new()
            }
        )
    }

    #[test]
    pub fn test_lease_break_ack_response_write() {
        let req_data = encode_content(Content::LeaseBreakAck(LeaseBreakAck {
            lease_key: "70c8619e-165d-315e-d492-a01b0cbb3af2".parse().unwrap(),
            lease_state: LeaseState::new(),
        }));

        assert_eq!(
            req_data,
            [
                0x24, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x9e, 0x61, 0xc8, 0x70, 0x5d, 0x16, 0x5e,
                0x31, 0xd4, 0x92, 0xa0, 0x1b, 0xc, 0xbb, 0x3a, 0xf2, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
                0x0, 0x0, 0x0, 0x0, 0x0, 0x0
            ]
        )
    }

    #[test]
    pub fn test_lease_break_ack_response_parses() {
        let data = [
            0x24, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x9e, 0x61, 0xc8, 0x70, 0x5d, 0x16, 0x5e,
            0x31, 0xd4, 0x92, 0xa0, 0x1b, 0xc, 0xbb, 0x3a, 0xf2, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
            0x0, 0x0, 0x0, 0x0, 0x0,
        ];
        let parsed = LeaseBreakAckResponse::read_le(&mut Cursor::new(&data)).unwrap();
        assert_eq!(
            parsed,
            LeaseBreakAckResponse {
                lease_key: "70c8619e-165d-315e-d492-a01b0cbb3af2".parse().unwrap(),
                lease_state: LeaseState::new(),
            }
        )
    }
}