Add the packet2pcap utility.
parent
6b3f103c05
commit
d4fa764b23
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@ -42,6 +42,11 @@ default = [
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"socket-raw", "socket-icmp", "socket-udp", "socket-tcp"
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]
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[[example]]
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name = "packet2pcap"
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path = "utils/packet2pcap.rs"
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required-features = ["std"]
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[[example]]
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name = "tcpdump"
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required-features = ["std", "phy-raw_socket", "proto-ipv4"]
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@ -92,15 +92,15 @@ impl<T: AsRef<PcapSink>> PcapSink for T {
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}
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#[cfg(feature = "std")]
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impl<T: AsMut<Write>> PcapSink for RefCell<T> {
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impl<T: Write> PcapSink for RefCell<T> {
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fn write(&self, data: &[u8]) {
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self.borrow_mut().as_mut().write_all(data).expect("cannot write")
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self.borrow_mut().write_all(data).expect("cannot write")
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}
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fn packet(&self, timestamp: u64, packet: &[u8]) {
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self.packet_header(timestamp, packet.len());
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PcapSink::write(self, packet);
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self.borrow_mut().as_mut().flush().expect("cannot flush")
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self.borrow_mut().flush().expect("cannot flush")
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}
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}
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@ -0,0 +1,71 @@
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extern crate smoltcp;
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extern crate getopts;
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use std::cell::RefCell;
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use std::io::{self, Read, Write};
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use std::path::Path;
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use std::fs::File;
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use std::env;
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use std::process::exit;
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use smoltcp::phy::{PcapLinkType, PcapSink};
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use getopts::Options;
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fn convert(packet_filename: &Path, pcap_filename: &Path, link_type: PcapLinkType)
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-> io::Result<()> {
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let mut packet_file = File::open(packet_filename)?;
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let mut packet = Vec::new();
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packet_file.read_to_end(&mut packet)?;
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let pcap = RefCell::new(Vec::new());
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PcapSink::global_header(&pcap, link_type);
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PcapSink::packet(&pcap, 0, &packet[..]);
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let mut pcap_file = File::create(pcap_filename)?;
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pcap_file.write_all(&pcap.borrow()[..])?;
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Ok(())
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}
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fn print_usage(program: &str, opts: Options) {
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let brief = format!("Usage: {} [options] INPUT OUTPUT", program);
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print!("{}", opts.usage(&brief));
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}
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fn main() {
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let args: Vec<String> = env::args().collect();
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let program = args[0].clone();
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let mut opts = Options::new();
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opts.optflag("h", "help", "print this help menu");
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opts.optopt("t", "link-type", "set link type (one of: ethernet ip)", "TYPE");
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let matches = match opts.parse(&args[1..]) {
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Ok(m) => m,
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Err(e) => {
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eprintln!("{}", e);
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return
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}
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};
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let link_type =
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match matches.opt_str("t").as_ref().map(|s| &s[..]) {
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Some("ethernet") => Some(PcapLinkType::Ethernet),
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Some("ip") => Some(PcapLinkType::Ip),
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_ => None
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};
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if matches.opt_present("h") || matches.free.len() != 2 || link_type.is_none() {
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print_usage(&program, opts);
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return
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}
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match convert(Path::new(&matches.free[0]),
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Path::new(&matches.free[1]),
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link_type.unwrap()) {
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Ok(()) => (),
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Err(e) => {
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eprintln!("Cannot convert packet to pcap: {}", e);
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exit(1);
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}
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}
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}
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