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suricata/rust/src/ikev2/state.rs

58 lines
2.2 KiB
Rust

/* 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.
*/
// written by Pierre Chifflier <chifflier@wzdftpd.net>
extern crate ipsec_parser;
use self::ipsec_parser::*;
#[derive(Clone, Debug, PartialEq)]
#[repr(u8)]
pub enum IKEV2ConnectionState {
Init,
InitSASent,
InitKESent,
InitNonceSent,
RespSASent,
RespKESent,
RespNonceSent,
RespCertReqSent,
ParsingDone,
Invalid,
}
impl IKEV2ConnectionState {
pub fn advance(&self, payload: &IkeV2Payload) -> IKEV2ConnectionState {
use self::IKEV2ConnectionState::*;
match (self, &payload.content) {
(&Init, &IkeV2PayloadContent::SA(_)) => InitSASent,
(&InitSASent, &IkeV2PayloadContent::KE(_)) => InitKESent,
(&InitKESent, &IkeV2PayloadContent::Nonce(_)) => InitNonceSent,
(&InitNonceSent, &IkeV2PayloadContent::SA(_)) => RespSASent,
(&RespSASent, &IkeV2PayloadContent::KE(_)) => RespKESent,
(&RespKESent, &IkeV2PayloadContent::Nonce(_)) => ParsingDone, // RespNonceSent,
(&RespNonceSent, &IkeV2PayloadContent::CertificateRequest(_)) => ParsingDone, // RespCertReqSent,
(&ParsingDone,_) => self.clone(),
(_, &IkeV2PayloadContent::Notify(_)) => self.clone(),
(_, &IkeV2PayloadContent::Dummy) => self.clone(),
(_,_) => Invalid,
}
}
}