/* Copyright (C) 2018 Open Information Security Foundation
 *
 * You can copy, redistribute or modify this Program under the terms of
 * the GNU General Public License version 2 as published by the Free
 * Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

use crate::core::*;
use crate::smb::smb::*;

#[repr(u32)]
pub enum SMBEvent {
    InternalError = 0,
    MalformedData = 1,
    RecordOverflow = 2,
    MalformedNtlmsspRequest = 3,
    MalformedNtlmsspResponse = 4,
    DuplicateNegotiate = 5,
    NegotiateMalformedDialects = 6,
    FileOverlap = 7,
}

impl SMBEvent {
    pub fn from_i32(value: i32) -> Option<SMBEvent> {
        match value {
            0 => Some(SMBEvent::InternalError),
            1 => Some(SMBEvent::MalformedData),
            2 => Some(SMBEvent::RecordOverflow),
            3 => Some(SMBEvent::MalformedNtlmsspRequest),
            4 => Some(SMBEvent::MalformedNtlmsspResponse),
            5 => Some(SMBEvent::DuplicateNegotiate),
            6 => Some(SMBEvent::NegotiateMalformedDialects),
            7 => Some(SMBEvent::FileOverlap),
            _ => None,
        }
    }
}

pub fn smb_str_to_event(instr: &str) -> i32 {
    SCLogDebug!("checking {}", instr);
    match instr {
        "internal_error"                => SMBEvent::InternalError as i32,
        "malformed_data"                => SMBEvent::MalformedData as i32,
        "record_overflow"               => SMBEvent::RecordOverflow as i32,
        "malformed_ntlmssp_request"     => SMBEvent::MalformedNtlmsspRequest as i32,
        "malformed_ntlmssp_response"    => SMBEvent::MalformedNtlmsspResponse as i32,
        "duplicate_negotiate"           => SMBEvent::DuplicateNegotiate as i32,
        "negotiate_malformed_dialects"  => SMBEvent::NegotiateMalformedDialects as i32,
        "file_overlap"                  => SMBEvent::FileOverlap as i32,
        _ => -1,
    }
}

impl SMBTransaction {
    /// Set event.
    pub fn set_event(&mut self, e: SMBEvent) {
        sc_app_layer_decoder_events_set_event_raw(&mut self.events, e as u8);
    }

    /// Set events from vector of events.
    pub fn set_events(&mut self, events: Vec<SMBEvent>) {
        for e in events {
            sc_app_layer_decoder_events_set_event_raw(&mut self.events, e as u8);
        }
    }
}

impl SMBState {
    /// Set an event. The event is set on the most recent transaction.
    pub fn set_event(&mut self, event: SMBEvent) {
        let len = self.transactions.len();
        if len == 0 {
            return;
        }

        let tx = &mut self.transactions[len - 1];
        tx.set_event(event);
        //sc_app_layer_decoder_events_set_event_raw(&mut tx.events, event as u8);
    }
}