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lib: add IMSI requested heuristic

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This commit is contained in:
Will Greenberg
2025-01-08 14:32:56 -08:00
committed by Cooper Quintin
parent 10592bbd9d
commit fa612241a5
4 changed files with 75 additions and 4 deletions
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8
lib/src/analysis/information_element.rs
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@@ -5,7 +5,7 @@
use telcom_parser::{decode, lte_rrc};
use thiserror::Error;
use crate::gsmtap::{GsmtapType, LteRrcSubtype, GsmtapMessage};
use crate::gsmtap::{GsmtapMessage, GsmtapType, LteNasSubtype, LteRrcSubtype};
#[derive(Error, Debug)]
pub enum InformationElementError {
@@ -40,6 +40,9 @@ pub enum LteInformationElement {
SbcchSlBch(lte_rrc::SBCCH_SL_BCH_Message),
SbcchSlBchV2x(lte_rrc::SBCCH_SL_BCH_Message_V2X_r14),
// FIXME: actually parse NAS messages
NAS(Vec<u8>),
// FIXME: unclear which message these "NB" types map to
//DlCcchNb(),
//DlDcchNb(),
@@ -79,6 +82,9 @@ impl TryFrom<&GsmtapMessage> for InformationElement {
};
Ok(InformationElement::LTE(lte))
},
GsmtapType::LteNas(LteNasSubtype::Plain) => {
Ok(InformationElement::LTE(LteInformationElement::NAS(gsmtap_msg.payload.clone())))
},
_ => Err(InformationElementError::UnsupportedGsmtapType(gsmtap_msg.header.gsmtap_type)),
}
}