added sixlowpan fragmentation benchmark

Cargo.toml

@@ -115,6 +115,9 @@ required-features = ["std", "medium-ethernet", "medium-ip", "phy-tuntap_interfac
 [[example]]
 name = "sixlowpan"
 required-features = ["std", "medium-ieee802154", "phy-raw_socket", "proto-sixlowpan", "socket-udp"]
+[[example]]
+name = "sixlowpan_benchmark"
+required-features = ["std", "medium-ieee802154", "phy-raw_socket", "proto-sixlowpan", "socket-udp"]
 
 [[example]]
 name = "dns"

examples/benchmark.rs

@@ -81,8 +81,6 @@ fn main() {
         _ => panic!("invalid mode"),
     };
 
-    thread::spawn(move || client(mode));
-
     let neighbor_cache = NeighborCache::new(BTreeMap::new());
 
     let tcp1_rx_buffer = tcp::SocketBuffer::new(vec![0; 65535]);
@@ -108,6 +106,7 @@ fn main() {
     let tcp2_handle = iface.add_socket(tcp2_socket);
     let default_timeout = Some(Duration::from_millis(1000));
 
+    thread::spawn(move || client(mode));
     let mut processed = 0;
     while !CLIENT_DONE.load(Ordering::SeqCst) {
         let timestamp = Instant::now();

examples/sixlowpan.rs

@@ -49,11 +49,11 @@ use std::str;
 
 use smoltcp::iface::{FragmentsCache, InterfaceBuilder, NeighborCache};
 use smoltcp::phy::{wait as phy_wait, Medium, RawSocket};
+use smoltcp::socket::tcp;
 use smoltcp::socket::udp;
+use smoltcp::storage::RingBuffer;
 use smoltcp::time::Instant;
 use smoltcp::wire::{Ieee802154Pan, IpAddress, IpCidr};
-use smoltcp::socket::tcp;
-use smoltcp::storage::RingBuffer;
 
 fn main() {
     utils::setup_logging("");

examples/sixlowpan_benchmark.rs

@@ -0,0 +1,247 @@
+//! 6lowpan benchmark exmaple
+//!
+//! This example runs a simple TCP throughput benchmark using the 6lowpan implementation in smoltcp
+//! It is designed to run using the Linux ieee802154/6lowpan support,
+//! using mac802154_hwsim.
+//!
+//! mac802154_hwsim allows you to create multiple "virtual" radios and specify
+//! which is in range with which. This is very useful for testing without
+//! needing real hardware. By default it creates two interfaces `wpan0` and
+//! `wpan1` that are in range with each other. You can customize this with
+//! the `wpan-hwsim` tool.
+//!
+//! We'll configure Linux to speak 6lowpan on `wpan0`, and leave `wpan1`
+//! unconfigured so smoltcp can use it with a raw socket.
+//!
+//!
+//!
+//!
+//!
+//! # Setup
+//!    
+//!     modprobe mac802154_hwsim
+//!
+//!     ip link set wpan0 down
+//!     ip link set wpan1 down
+//!     iwpan dev wpan0 set pan_id 0xbeef
+//!     iwpan dev wpan1 set pan_id 0xbeef
+//!     ip link add link wpan0 name lowpan0 type lowpan
+//!     ip link set wpan0 up
+//!     ip link set wpan1 up
+//!     ip link set lowpan0 up
+//!
+//!
+//! # Running
+//!
+//! Compile with `cargo build --release --example sixlowpan_benchmark`
+//! Run it with `sudo ./target/release/examples/sixlowpan_benchmark [reader|writer]`.
+//!
+//! # Teardown
+//!
+//!     rmmod mac802154_hwsim
+//!
+
+mod utils;
+
+use log::debug;
+use std::collections::BTreeMap;
+use std::os::unix::io::AsRawFd;
+use std::str;
+
+use smoltcp::iface::{FragmentsCache, InterfaceBuilder, NeighborCache};
+use smoltcp::phy::{wait as phy_wait, Medium, RawSocket};
+use smoltcp::socket::tcp;
+use smoltcp::storage::RingBuffer;
+use smoltcp::wire::{Ieee802154Pan, IpAddress, IpCidr};
+
+//For benchmark
+use smoltcp::time::{Duration, Instant};
+use std::cmp;
+use std::io::{Read, Write};
+use std::net::SocketAddrV6;
+use std::net::TcpStream;
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::thread;
+
+use std::fs;
+
+fn if_nametoindex(ifname: &str) -> u32 {
+    let contents = fs::read_to_string(format!("/sys/devices/virtual/net/{}/ifindex", ifname))
+        .expect("couldn't read interface from \"/sys/devices/virtual/net\"")
+        .replace("\n", "");
+    contents.parse::<u32>().unwrap()
+}
+
+const AMOUNT: usize = 100_000_000;
+
+enum Client {
+    Reader,
+    Writer,
+}
+
+fn client(kind: Client) {
+    let port: u16 = match kind {
+        Client::Reader => 1234,
+        Client::Writer => 1235,
+    };
+
+    let scope_id = if_nametoindex("lowpan0");
+
+    let socket_addr = SocketAddrV6::new(
+        "fe80:0:0:0:180b:4242:4242:4242".parse().unwrap(),
+        port,
+        0,
+        scope_id,
+    );
+
+    let mut stream = TcpStream::connect(socket_addr).expect("failed to connect TLKAGMKA");
+    let mut buffer = vec![0; 1_000_000];
+
+    let start = Instant::now();
+
+    let mut processed = 0;
+    while processed < AMOUNT {
+        let length = cmp::min(buffer.len(), AMOUNT - processed);
+        let result = match kind {
+            Client::Reader => stream.read(&mut buffer[..length]),
+            Client::Writer => stream.write(&buffer[..length]),
+        };
+        match result {
+            Ok(0) => break,
+            Ok(result) => {
+                // print!("(P:{})", result);
+                processed += result
+            }
+            Err(err) => panic!("cannot process: {}", err),
+        }
+    }
+
+    let end = Instant::now();
+
+    let elapsed = (end - start).total_millis() as f64 / 1000.0;
+
+    println!("throughput: {:.3} Gbps", AMOUNT as f64 / elapsed / 0.125e9);
+
+    CLIENT_DONE.store(true, Ordering::SeqCst);
+}
+
+static CLIENT_DONE: AtomicBool = AtomicBool::new(false);
+
+fn main() {
+    #[cfg(feature = "log")]
+    utils::setup_logging("info");
+
+    let (mut opts, mut free) = utils::create_options();
+    utils::add_middleware_options(&mut opts, &mut free);
+    free.push("MODE");
+
+    let mut matches = utils::parse_options(&opts, free);
+
+    let device = RawSocket::new("wpan1", Medium::Ieee802154).unwrap();
+
+    let fd = device.as_raw_fd();
+    let device = utils::parse_middleware_options(&mut matches, device, /*loopback=*/ false);
+
+    let mode = match matches.free[0].as_ref() {
+        "reader" => Client::Reader,
+        "writer" => Client::Writer,
+        _ => panic!("invalid mode"),
+    };
+
+    let neighbor_cache = NeighborCache::new(BTreeMap::new());
+
+    let tcp1_rx_buffer = tcp::SocketBuffer::new(vec![0; 4096]);
+    let tcp1_tx_buffer = tcp::SocketBuffer::new(vec![0; 4096]);
+    let tcp1_socket = tcp::Socket::new(tcp1_rx_buffer, tcp1_tx_buffer);
+
+    let tcp2_rx_buffer = tcp::SocketBuffer::new(vec![0; 4096]);
+    let tcp2_tx_buffer = tcp::SocketBuffer::new(vec![0; 4096]);
+    let tcp2_socket = tcp::Socket::new(tcp2_rx_buffer, tcp2_tx_buffer);
+
+    let ieee802154_addr = smoltcp::wire::Ieee802154Address::Extended([
+        0x1a, 0x0b, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42,
+    ]);
+    let ip_addrs = [IpCidr::new(
+        IpAddress::v6(0xfe80, 0, 0, 0, 0x180b, 0x4242, 0x4242, 0x4242),
+        64,
+    )];
+
+    let cache = FragmentsCache::new(vec![], BTreeMap::new());
+
+    let buffer: Vec<(usize, managed::ManagedSlice<'_, u8>)> = (0..12)
+        .into_iter()
+        .map(|_| (0_usize, managed::ManagedSlice::from(vec![0; 1_000_000_000])))
+        .collect();
+
+    let out_fragments_cache = RingBuffer::new(buffer);
+
+    let mut builder = InterfaceBuilder::new(device, vec![])
+        .ip_addrs(ip_addrs)
+        .pan_id(Ieee802154Pan(0xbeef));
+    builder = builder
+        .hardware_addr(ieee802154_addr.into())
+        .neighbor_cache(neighbor_cache)
+        .sixlowpan_fragments_cache(cache)
+        .out_fragments_cache(out_fragments_cache);
+    let mut iface = builder.finalize();
+
+    let tcp1_handle = iface.add_socket(tcp1_socket);
+    let tcp2_handle = iface.add_socket(tcp2_socket);
+
+    let default_timeout = Some(Duration::from_millis(1000));
+
+    thread::spawn(move || client(mode));
+    let mut processed = 0;
+
+    while !CLIENT_DONE.load(Ordering::SeqCst) {
+        let timestamp = Instant::now();
+        match iface.poll(timestamp) {
+            Ok(_) => {}
+            Err(e) => {
+                debug!("poll error: {}", e);
+            }
+        }
+
+        // tcp:1234: emit data
+        let socket = iface.get_socket::<tcp::Socket>(tcp1_handle);
+        if !socket.is_open() {
+            socket.listen(1234).unwrap();
+        }
+
+        if socket.can_send() && processed < AMOUNT {
+            let length = socket
+                .send(|buffer| {
+                    let length = cmp::min(buffer.len(), AMOUNT - processed);
+                    (length, length)
+                })
+                .unwrap();
+            processed += length;
+        }
+
+        // tcp:1235: sink data
+        let socket = iface.get_socket::<tcp::Socket>(tcp2_handle);
+        if !socket.is_open() {
+            socket.listen(1235).unwrap();
+        }
+
+        if socket.can_recv() && processed < AMOUNT {
+            let length = socket
+                .recv(|buffer| {
+                    let length = cmp::min(buffer.len(), AMOUNT - processed);
+                    (length, length)
+                })
+                .unwrap();
+            processed += length;
+        }
+
+        match iface.poll_at(timestamp) {
+            Some(poll_at) if timestamp < poll_at => {
+                phy_wait(fd, Some(poll_at - timestamp)).expect("wait error");
+            }
+            Some(_) => (),
+            None => {
+                phy_wait(fd, default_timeout).expect("wait error");
+            }
+        }
+    }
+}

src/iface/interface.rs

@@ -979,17 +979,24 @@ where
             let mut neighbor_addr = None;
             let mut respond = |inner: &mut InterfaceInner, response: IpPacket| {
                 neighbor_addr = Some(response.ip_repr().dst_addr());
-                // FIXME(thvdveld): remove unwrap
-                let tx_token = device.transmit().ok_or(Error::Exhausted).unwrap();
-                #[cfg(feature = "proto-sixlowpan")]
-                {
-                    inner.dispatch_ip(tx_token, response, Some(out_fragments)).unwrap();
+                match device.transmit().ok_or(Error::Exhausted) {
+                    Ok(t) => {
+                        #[cfg(feature = "proto-sixlowpan")]
+                        if let Err(_e) = inner.dispatch_ip(t, response, Some(out_fragments)) {
+                            net_debug!("failed to dispatch IP: {}", _e);
+                        }
+
+                        #[cfg(not(feature = "proto-sixlowpan"))]
+                        if let Err(_e) = inner.dispatch_ip(t, response, None) {
+                            net_debug!("failed to dispatch IP: {}", _e);
+                        }
+                        emitted_any = true;
+                    }
+                    Err(e) => {
+                        net_debug!("failed to transmit IP: {}", e);
+                    }
                 }
-                #[cfg(not(feature = "proto-sixlowpan"))]
-                {
-                    check!(inner.dispatch_ip(tx_token, response, None));
-                }
-                emitted_any = true;
+
                 Ok(())
             };
 
@@ -2734,6 +2741,7 @@ impl<'a> InterfaceInner<'a> {
 
         let (src_addr, dst_addr) = match (ip_repr.src_addr(), ip_repr.dst_addr()) {
             (IpAddress::Ipv6(src_addr), IpAddress::Ipv6(dst_addr)) => (src_addr, dst_addr),
+            #[allow(unreachable_patterns)]
             _ => return Err(Error::Unaddressable),
         };
 
@@ -2905,32 +2913,36 @@ impl<'a> InterfaceInner<'a> {
 
             // We need to save the the rest of the packets into the `out_fragments` buffer.
             while written < total_size {
-                out_fragments.enqueue_one_with::<'_, (), Error, _>(|(len, tx_buf)| {
-                    let mut tx_buf = &mut tx_buf[..];
+                out_fragments
+                    .enqueue_one_with::<'_, (), Error, _>(|(len, tx_buf)| {
+                        let mut tx_buf = &mut tx_buf[..];
 
-                    // Modify the sequence number of the IEEE header
-                    ieee_repr.sequence_number = Some(self.get_sequence_number());
-                    let mut ieee_packet = Ieee802154Frame::new_unchecked(&mut tx_buf[..ieee_len]);
-                    ieee_repr.emit(&mut ieee_packet);
-                    tx_buf = &mut tx_buf[ieee_len..];
+                        // Modify the sequence number of the IEEE header
+                        ieee_repr.sequence_number = Some(self.get_sequence_number());
+                        let mut ieee_packet =
+                            Ieee802154Frame::new_unchecked(&mut tx_buf[..ieee_len]);
+                        ieee_repr.emit(&mut ieee_packet);
+                        tx_buf = &mut tx_buf[ieee_len..];
 
-                    // Add the next fragment header
-                    let datagram_offset = ((40 + written - ieee_len) / 8) as u8;
-                    fragn.set_offset(datagram_offset);
-                    let mut frag_packet =
-                        SixlowpanFragPacket::new_unchecked(&mut tx_buf[..fragn.buffer_len()]);
-                    fragn.emit(&mut frag_packet);
-                    tx_buf = &mut tx_buf[fragn.buffer_len()..];
+                        // Add the next fragment header
+                        let datagram_offset = ((40 + written - ieee_len) / 8) as u8;
+                        fragn.set_offset(datagram_offset);
+                        let mut frag_packet =
+                            SixlowpanFragPacket::new_unchecked(&mut tx_buf[..fragn.buffer_len()]);
+                        fragn.emit(&mut frag_packet);
+                        tx_buf = &mut tx_buf[fragn.buffer_len()..];
 
-                    // Add the buffer part
-                    let frag_size = (total_size - written).min(fragn_size);
-                    tx_buf[..frag_size].copy_from_slice(&buffer[written..][..frag_size]);
-                    written += frag_size;
+                        // Add the buffer part
+                        let frag_size = (total_size - written).min(fragn_size);
+                        tx_buf[..frag_size].copy_from_slice(&buffer[written..][..frag_size]);
+                        written += frag_size;
 
-                    // Save the lenght of this packet.
-                    *len = ieee_len + fragn.buffer_len() + frag_size;
-                    Ok(())
-                }).unwrap().unwrap();
+                        // Save the lenght of this packet.
+                        *len = ieee_len + fragn.buffer_len() + frag_size;
+                        Ok(())
+                    })
+                    .unwrap()
+                    .unwrap();
             }
 
             Ok(())

src/wire/sixlowpan.rs

@@ -325,7 +325,7 @@ pub mod frag {
         }
     }
 
-    impl<'a, T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
+    impl<T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
         fn set_dispatch_field(&mut self, value: u8) {
             let raw = self.buffer.as_mut();
             raw[field::DISPATCH] = (raw[field::DISPATCH] & !(0b11111 << 3)) | (value << 3);
@@ -839,7 +839,7 @@ pub mod iphc {
         }
     }
 
-    impl<'a, T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
+    impl<T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
         /// Set the dispatch field to `0b011`.
         fn set_dispatch_field(&mut self) {
             let data = &mut self.buffer.as_mut()[field::IPHC_FIELD];
@@ -1506,7 +1506,7 @@ pub mod nhc {
         }
     }
 
-    impl<'a, T: AsRef<[u8]> + AsMut<[u8]>> ExtHeaderPacket<T> {
+    impl<T: AsRef<[u8]> + AsMut<[u8]>> ExtHeaderPacket<T> {
         /// Return a mutable pointer to the payload.
         pub fn payload_mut(&mut self) -> &mut [u8] {
             let start = 2 + self.next_header_size();
@@ -1781,7 +1781,7 @@ pub mod nhc {
         }
     }
 
-    impl<'a, T: AsRef<[u8]> + AsMut<[u8]>> UdpNhcPacket<T> {
+    impl<T: AsRef<[u8]> + AsMut<[u8]>> UdpNhcPacket<T> {
         /// Return a mutable pointer to the payload.
         pub fn payload_mut(&mut self) -> &mut [u8] {
             let start = 1 + self.ports_size() + 2; // XXX(thvdveld): we assume we put the checksum inlined.