#![allow(dead_code)]
use std::cell::RefCell;
use std::str::{self, FromStr};
use std::rc::Rc;
use std::io;
use std::fs::File;
use std::time::{SystemTime, UNIX_EPOCH};
use std::env;
use std::process;
#[cfg(feature = "log")]
use log::{LogLevel, LogLevelFilter, LogRecord};
#[cfg(feature = "log")]
use env_logger::LogBuilder;
use getopts::{Options, Matches};
use smoltcp::phy::{Device, EthernetTracer, FaultInjector};
#[cfg(feature = "phy-tap_interface")]
use smoltcp::phy::TapInterface;
use smoltcp::phy::{PcapWriter, PcapSink, PcapMode, PcapLinkType};
use smoltcp::phy::RawSocket;
use smoltcp::time::{Duration, Instant};
#[cfg(feature = "log")]
pub fn setup_logging_with_clock<F>(filter: &str, since_startup: F)
where F: Fn() -> Instant + Send + Sync + 'static {
LogBuilder::new()
.format(move |record: &LogRecord| {
let elapsed = since_startup();
let timestamp = format!("[{}]", elapsed);
if record.target().starts_with("smoltcp::") {
format!("\x1b[0m{} ({}): {}\x1b[0m", timestamp,
record.target().replace("smoltcp::", ""), record.args())
} else if record.level() == LogLevel::Trace {
let message = format!("{}", record.args());
format!("\x1b[37m{} {}\x1b[0m", timestamp,
message.replace("\n", "\n "))
} else {
format!("\x1b[32m{} ({}): {}\x1b[0m", timestamp,
record.target(), record.args())
}
})
.filter(None, LogLevelFilter::Trace)
.parse(filter)
.parse(&env::var("RUST_LOG").unwrap_or("".to_owned()))
.init()
.unwrap();
}
#[cfg(feature = "log")]
pub fn setup_logging(filter: &str) {
setup_logging_with_clock(filter, move || {
Instant::now()
})
}
pub fn create_options() -> (Options, Vec<&'static str>) {
let mut opts = Options::new();
opts.optflag("h", "help", "print this help menu");
(opts, Vec::new())
}
pub fn parse_options(options: &Options, free: Vec<&str>) -> Matches {
match options.parse(env::args().skip(1)) {
Err(err) => {
println!("{}", err);
process::exit(1)
}
Ok(matches) => {
if matches.opt_present("h") || matches.free.len() != free.len() {
let brief = format!("Usage: {} [OPTION]... {}",
env::args().nth(0).unwrap(), free.join(" "));
print!("{}", options.usage(&brief));
process::exit(if matches.free.len() != free.len() { 1 } else { 0 })
}
matches
}
}
}
pub fn add_tap_options(_opts: &mut Options, free: &mut Vec<&str>) {
free.push("INTERFACE");
}
#[cfg(feature = "phy-tap_interface")]
pub fn parse_tap_options(matches: &mut Matches) -> TapInterface {
let interface = matches.free.remove(0);
TapInterface::new(&interface).unwrap()
}
pub fn parse_raw_socket_options(matches: &mut Matches) -> RawSocket {
let interface = matches.free.remove(0);
RawSocket::new(&interface).unwrap()
}
pub fn add_middleware_options(opts: &mut Options, _free: &mut Vec<&str>) {
opts.optopt("", "pcap", "Write a packet capture file", "FILE");
opts.optopt("", "drop-chance", "Chance of dropping a packet (%)", "CHANCE");
opts.optopt("", "corrupt-chance", "Chance of corrupting a packet (%)", "CHANCE");
opts.optopt("", "size-limit", "Drop packets larger than given size (octets)", "SIZE");
opts.optopt("", "tx-rate-limit", "Drop packets after transmit rate exceeds given limit \
(packets per interval)", "RATE");
opts.optopt("", "rx-rate-limit", "Drop packets after transmit rate exceeds given limit \
(packets per interval)", "RATE");
opts.optopt("", "shaping-interval", "Sets the interval for rate limiting (ms)", "RATE");
}
pub fn parse_middleware_options<D>(matches: &mut Matches, device: D, loopback: bool)
-> FaultInjector<EthernetTracer<PcapWriter<D, Rc<PcapSink>>>>
where D: for<'a> Device<'a>
{
let drop_chance = matches.opt_str("drop-chance").map(|s| u8::from_str(&s).unwrap())
.unwrap_or(0);
let corrupt_chance = matches.opt_str("corrupt-chance").map(|s| u8::from_str(&s).unwrap())
.unwrap_or(0);
let size_limit = matches.opt_str("size-limit").map(|s| usize::from_str(&s).unwrap())
.unwrap_or(0);
let tx_rate_limit = matches.opt_str("tx-rate-limit").map(|s| u64::from_str(&s).unwrap())
.unwrap_or(0);
let rx_rate_limit = matches.opt_str("rx-rate-limit").map(|s| u64::from_str(&s).unwrap())
.unwrap_or(0);
let shaping_interval = matches.opt_str("shaping-interval").map(|s| u64::from_str(&s).unwrap())
.unwrap_or(0);
let pcap_writer: Box<io::Write>;
if let Some(pcap_filename) = matches.opt_str("pcap") {
pcap_writer = Box::new(File::create(pcap_filename).expect("cannot open file"))
} else {
pcap_writer = Box::new(io::sink())
}
let seed = SystemTime::now().duration_since(UNIX_EPOCH).unwrap().subsec_nanos();
let device = PcapWriter::new(device, Rc::new(RefCell::new(pcap_writer)) as Rc<PcapSink>,
if loopback { PcapMode::TxOnly } else { PcapMode::Both },
PcapLinkType::Ethernet);
let device = EthernetTracer::new(device, |_timestamp, _printer| {
#[cfg(feature = "log")]
trace!("{}", _printer);
});
let mut device = FaultInjector::new(device, seed);
device.set_drop_chance(drop_chance);
device.set_corrupt_chance(corrupt_chance);
device.set_max_packet_size(size_limit);
device.set_max_tx_rate(tx_rate_limit);
device.set_max_rx_rate(rx_rate_limit);
device.set_bucket_interval(Duration::from_millis(shaping_interval));
device
}