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|
use chrono::Utc;
use std::collections::HashMap;
/******************************************************************************
* Struct
******************************************************************************/
const MAX_SESSION_EXPIRE_TIME: i64 = 60;
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum SessionDirection {
C2S,
S2C,
}
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum SessionProto {
TCP,
UDP,
}
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum SessionState {
New,
Active,
Inactive,
Expired,
}
#[derive(Debug)]
pub struct SessionMetrics {
pub send_pkts: u64,
pub send_bytes: u64,
pub recv_pkts: u64,
pub recv_bytes: u64,
}
#[derive(Debug)]
struct SessionTimeStamp {
ts_start: i64,
ts_end: i64,
ts_expires: i64,
ts_last: i64,
}
/******************************************************************************
* why no current packet in session?
* - session lifetime is longer than packet lifetime
* - if current packet is iterm of session, require packet lifetime > session lifetime
******************************************************************************/
#[derive(Debug)]
pub struct Session {
session_id: String,
session_proto: SessionProto,
session_state: SessionState,
session_metrics_c2s: SessionMetrics,
session_metrics_s2c: SessionMetrics,
session_timestamp: SessionTimeStamp,
session_exdata: HashMap<String, String>,
session_current_dir: SessionDirection,
}
/******************************************************************************
* API
******************************************************************************/
impl Session {
pub fn new(session_id: String) -> Session {
let timestamp = Utc::now().timestamp();
Session {
session_id,
session_proto: SessionProto::TCP,
session_state: SessionState::New,
session_metrics_c2s: SessionMetrics {
send_pkts: 0,
send_bytes: 0,
recv_pkts: 0,
recv_bytes: 0,
},
session_metrics_s2c: SessionMetrics {
send_pkts: 0,
send_bytes: 0,
recv_pkts: 0,
recv_bytes: 0,
},
session_timestamp: SessionTimeStamp {
ts_start: timestamp,
ts_end: 0,
ts_expires: timestamp + MAX_SESSION_EXPIRE_TIME,
ts_last: timestamp,
},
session_exdata: HashMap::new(),
session_current_dir: SessionDirection::C2S,
}
}
pub fn get_session_id(&self) -> String {
self.session_id.clone()
}
pub fn get_session_start_ts(&self) -> i64 {
self.session_timestamp.ts_start
}
pub fn set_session_proto(&mut self, proto: SessionProto) {
self.session_proto = proto;
}
pub fn get_session_proto(&self) -> SessionProto {
self.session_proto
}
pub fn set_session_state(&mut self, state: SessionState) {
self.session_state = state;
}
pub fn get_session_state(&self) -> SessionState {
self.session_state
}
pub fn inc_session_c2s_metrics(
&mut self,
send_pkts: u64,
send_bytes: u64,
recv_pkts: u64,
recv_bytes: u64,
) {
self.session_metrics_c2s.send_pkts += send_pkts;
self.session_metrics_c2s.send_bytes += send_bytes;
self.session_metrics_c2s.recv_pkts += recv_pkts;
self.session_metrics_c2s.recv_bytes += recv_bytes;
}
pub fn get_session_c2s_metrics(&self) -> &SessionMetrics {
&self.session_metrics_c2s
}
pub fn inc_session_s2c_metrics(
&mut self,
send_pkts: u64,
send_bytes: u64,
recv_pkts: u64,
recv_bytes: u64,
) {
self.session_metrics_s2c.send_pkts += send_pkts;
self.session_metrics_s2c.send_bytes += send_bytes;
self.session_metrics_s2c.recv_pkts += recv_pkts;
self.session_metrics_s2c.recv_bytes += recv_bytes;
}
pub fn get_session_s2c_metrics(&self) -> &SessionMetrics {
&self.session_metrics_s2c
}
pub fn update_session_expire_ts(&mut self) {
self.session_timestamp.ts_expires = Utc::now().timestamp() + MAX_SESSION_EXPIRE_TIME;
}
pub fn get_session_expire_ts(&self) -> i64 {
self.session_timestamp.ts_expires
}
pub fn update_session_last_ts(&mut self) {
self.session_timestamp.ts_last = Utc::now().timestamp();
}
pub fn get_session_last_ts(&self) -> i64 {
self.session_timestamp.ts_last
}
pub fn set_session_end_ts(&mut self, ts: i64) {
self.session_timestamp.ts_end = ts;
}
pub fn get_session_end_ts(&self) -> i64 {
self.session_timestamp.ts_end
}
pub fn set_session_exdata(&mut self, key: String, value: String) {
self.session_exdata.insert(key, value);
}
pub fn get_session_exdata(&self, key: String) -> Option<&String> {
self.session_exdata.get(&key)
}
pub fn update_session_current_dir(&mut self, dir: SessionDirection) {
self.session_current_dir = dir;
}
pub fn get_session_current_dir(&self) -> SessionDirection {
self.session_current_dir
}
}
/******************************************************************************
* TEST
******************************************************************************/
#[cfg(test)]
mod tests {
use super::Session;
#[test]
fn test_session() {
let mut session = Session::new("192.168.0.1:2345-192.168.0.2:80-1".to_string());
assert_eq!(
session.get_session_id(),
"192.168.0.1:2345-192.168.0.2:80-1"
);
assert_eq!(session.get_session_state(), super::SessionState::New);
assert_eq!(session.get_session_c2s_metrics().recv_bytes, 0);
assert_eq!(session.get_session_c2s_metrics().recv_bytes, 0);
assert_eq!(session.get_session_c2s_metrics().send_pkts, 0);
assert_eq!(session.get_session_c2s_metrics().send_bytes, 0);
assert_eq!(session.get_session_s2c_metrics().recv_bytes, 0);
assert_eq!(session.get_session_s2c_metrics().recv_bytes, 0);
assert_eq!(session.get_session_s2c_metrics().send_pkts, 0);
assert_eq!(session.get_session_s2c_metrics().send_pkts, 0);
assert_eq!(
session.get_session_start_ts(),
session.get_session_last_ts()
);
assert_eq!(
session.get_session_start_ts(),
session.get_session_expire_ts() - 60
);
assert_eq!(session.get_session_end_ts(), 0);
session.set_session_exdata("Hello".to_string(), "Word".to_string());
assert_eq!(
session.get_session_exdata("Hello".to_string()),
Some(&"Word".to_string())
);
assert_eq!(
session.get_session_current_dir(),
super::SessionDirection::C2S
);
}
}
|
