diff --git a/bin/src/check.rs b/bin/src/check.rs
index e17a97c..02fa0bd 100644
--- a/bin/src/check.rs
+++ b/bin/src/check.rs
@@ -1,5 +1,5 @@
 use std::{collections::HashMap, future, path::PathBuf, pin::pin};
-use rayhunter::{analysis::analyzer::Harness, diag::DataType, qmdl::QmdlReader};
+use rayhunter::{analysis::analyzer::Harness, diag::DataType, gsmtap_parser, pcap::GsmtapPcapWriter, qmdl::QmdlReader};
 use tokio::fs::{metadata, read_dir, File};
 use clap::Parser;
 use futures::TryStreamExt;
@@ -12,6 +12,9 @@ struct Args {
     #[arg(short, long)]
     qmdl_path: PathBuf,
 
+    #[arg(short, long)]
+    pcapify: bool,
+
     #[arg(long)]
     show_skipped: bool,
 
@@ -54,6 +57,27 @@ async fn analyze_file(harness: &mut Harness, qmdl_path: &str, show_skipped: bool
     println!("{}: {} messages analyzed, {} warnings, {} messages skipped", qmdl_path, total_messages, warnings, skipped);
 }
 
+async fn pcapify(qmdl_path: &PathBuf) {
+    let qmdl_file = &mut File::open(&qmdl_path).await.expect("failed to open qmdl file");
+    let qmdl_file_size = qmdl_file.metadata().await.unwrap().len();
+    let mut qmdl_reader = QmdlReader::new(qmdl_file, Some(qmdl_file_size as usize));
+    let mut pcap_path = qmdl_path.clone();
+    pcap_path.set_extension("pcap");
+    let pcap_file = &mut File::create(&pcap_path).await.expect("failed to open pcap file");
+    let mut pcap_writer = GsmtapPcapWriter::new(pcap_file).await.unwrap();
+    pcap_writer.write_iface_header().await.unwrap();
+    while let Some(container) = qmdl_reader.get_next_messages_container().await.expect("failed to get container") {
+        for maybe_msg in container.into_messages() {
+            if let Ok(msg) = maybe_msg {
+                if let Ok(Some((timestamp, parsed))) = gsmtap_parser::parse(msg) {
+                    pcap_writer.write_gsmtap_message(parsed, timestamp).await.expect("failed to write");
+                }
+            }
+        }
+    }
+    println!("wrote pcap to {:?}", &pcap_path);
+}
+
 #[tokio::main]
 async fn main() {
     env_logger::init();
@@ -75,10 +99,19 @@ async fn main() {
             let name = entry.file_name();
             let name_str = name.to_str().unwrap();
             if name_str.ends_with(".qmdl") {
-                analyze_file(&mut harness, entry.path().to_str().unwrap(), args.show_skipped).await;
+                let path = entry.path();
+                let path_str = path.to_str().unwrap();
+                analyze_file(&mut harness, path_str, args.show_skipped).await;
+                if args.pcapify {
+                    pcapify(&path).await;
+                }
             }
         }
     } else {
-        analyze_file(&mut harness, args.qmdl_path.to_str().unwrap(), args.show_skipped).await;
+        let path = args.qmdl_path.to_str().unwrap();
+        analyze_file(&mut harness, path, args.show_skipped).await;
+        if args.pcapify {
+            pcapify(&args.qmdl_path).await;
+        }
     }
 }
diff --git a/lib/src/diag.rs b/lib/src/diag.rs
index 51c7aec..4d88434 100644
--- a/lib/src/diag.rs
+++ b/lib/src/diag.rs
@@ -183,6 +183,8 @@ pub enum LogBody {
     // * 0xb0ed: plain EMM NAS message (outgoing)
     #[deku(id_pat = "0xb0e2 | 0xb0e3 | 0xb0ec | 0xb0ed")]
     Nas4GMessage {
+        #[deku(ctx = "log_type")]
+        direction: Nas4GMessageDirection,
         ext_header_version: u8,
         rrc_rel: u8,
         rrc_version_minor: u8,
@@ -211,6 +213,19 @@ pub enum LogBody {
     }
 }
 
+#[derive(Debug, Clone, PartialEq, DekuRead, DekuWrite)]
+#[deku(ctx = "log_type: u16", id = "log_type")]
+pub enum Nas4GMessageDirection {
+    // * 0xb0e2: plain ESM NAS message (incoming)
+    // * 0xb0e3: plain ESM NAS message (outgoing)
+    // * 0xb0ec: plain EMM NAS message (incoming)
+    // * 0xb0ed: plain EMM NAS message (outgoing)
+    #[deku(id_pat = "0xb0e2 | 0xb0ec")]
+    Inbound,
+    #[deku(id_pat = "0xb0e3 | 0xb0ed")]
+    Outbound,
+}
+
 #[derive(Debug, Clone, PartialEq, DekuRead, DekuWrite)]
 #[deku(ctx = "ext_header_version: u8", id = "ext_header_version")]
 pub enum LteRrcOtaPacket {
diff --git a/lib/src/qmdl.rs b/lib/src/qmdl.rs
index e6863fc..aae1a85 100644
--- a/lib/src/qmdl.rs
+++ b/lib/src/qmdl.rs
@@ -60,7 +60,7 @@ impl<T> QmdlReader<T> where T: AsyncRead + Unpin {
         })
     }
 
-    async fn get_next_messages_container(&mut self) -> Result<Option<MessagesContainer>, std::io::Error> {
+    pub async fn get_next_messages_container(&mut self) -> Result<Option<MessagesContainer>, std::io::Error> {
         if let Some(max_bytes) = self.max_bytes {
             if self.bytes_read >= max_bytes {
                 if self.bytes_read > max_bytes {