feat: add pcap

__network/n_pcap/src/main.rs

@@ -0,0 +1,60 @@
+use std::env;
+use pcap::*;
+
+fn main() {
+    let mut args = env::args();
+    args.next();
+    match args.next() {
+        None => println!("No arg!"),
+        Some(arg1) => match arg1.as_str() {
+            "d" | "dump" => dump(),
+            "p" | "pcap" => pcap(),
+            _ => println!("Unknown arg: {}", arg1),
+        }
+    }
+}
+
+fn pcap() {
+    let device = Device::lookup().unwrap();
+    println!("Using device {}", device.name);
+
+    let mut cap = Capture::from_device(device)
+        .unwrap()
+        .immediate_mode(true)
+        .open()
+        .unwrap();
+
+    let mut savefile = cap.savefile("test.pcap").unwrap();
+
+    for _ in 0..10 {
+        let p = cap.next().unwrap();
+        println!("packet received on network: {:?}", p);
+        savefile.write(&p);
+    }
+    // let mut cap = Capture::from_file("test.pcap").unwrap();
+    // let p = cap.next().unwrap();
+    // println!("packet obtained from file: {:?}", p);
+}
+
+fn dump() {
+    let device = Device::lookup().unwrap();
+    println!("Using device {}", device.name);
+
+    let mut cap = Capture::from_device(device)
+        .unwrap()
+        .immediate_mode(true)
+        .open()
+        .unwrap();
+
+    loop {
+        if let Ok(c) = cap.next() {
+            println!("{:?}", c.header);
+            println!("{:?}", c.data);
+        }
+    }
+    // let stats = cap.stats().unwrap();
+    // println!(
+    //     "Received: {}, dropped: {}, if_dropped: {}",
+    //     stats.received, stats.dropped, stats.if_dropped
+    // );
+}