Add IPv6 link-local address to net_init and info response, use WaitGroup.Go

cmd/info/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"net"
 	"os"
 	"sync"
 	"time"
@@ -34,10 +35,8 @@ func run() error {
 	results := make([]deviceResult, len(devs))
 	var wg sync.WaitGroup
 	for i, dev := range devs {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
 		results[i].dev = dev
+		wg.Go(func() {
 			c, err := client.NewSerial(dev, 2*time.Second)
 			if err != nil {
 				results[i].err = err
@@ -47,7 +46,7 @@ func run() error {
 			c.Close()
 			results[i].info = info
 			results[i].err = err
-		}()
+		})
 	}
 	wg.Wait()
 
@@ -60,9 +59,8 @@ func run() error {
 		fmt.Printf("  Board ID: %02X%02X%02X%02X%02X%02X%02X%02X\n",
 			r.info.BoardID[0], r.info.BoardID[1], r.info.BoardID[2], r.info.BoardID[3],
 			r.info.BoardID[4], r.info.BoardID[5], r.info.BoardID[6], r.info.BoardID[7])
-		fmt.Printf("  MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
+		fmt.Printf("  MAC: %s\n", net.HardwareAddr(r.info.MAC[:]))
-			r.info.MAC[0], r.info.MAC[1], r.info.MAC[2],
+		fmt.Printf("  Link-Local: %s\n", net.IP(r.info.LinkLocal[:]))
-			r.info.MAC[3], r.info.MAC[4], r.info.MAC[5])
 	}
 
 	return nil

cmd/load/main.go

@@ -68,9 +68,7 @@ func run(buildDir string) error {
 
 	var wg sync.WaitGroup
 	for i := range 2 {
-		wg.Add(1)
+		wg.Go(func() {
-		go func() {
-			defer wg.Done()
 			c, err := client.NewSerial(devs[i], 2*time.Second)
 			if err != nil {
 				errs[i] = err
@@ -83,7 +81,7 @@ func run(buildDir string) error {
 				return
 			}
 			serials[i] = boardSerial(info.BoardID)
-		}()
+		})
 	}
 	wg.Wait()
 	for i, err := range errs {
@@ -94,9 +92,7 @@ func run(buildDir string) error {
 
 	fmt.Println("Sending PICOBOOT requests...")
 	for i := range 2 {
-		wg.Add(1)
+		wg.Go(func() {
-		go func() {
-			defer wg.Done()
 			c, err := client.NewSerial(devs[i], 2*time.Second)
 			if err != nil {
 				errs[i] = err
@@ -107,7 +103,7 @@ func run(buildDir string) error {
 			if err != nil {
 				errs[i] = fmt.Errorf("PICOBOOT %s: %w", devs[i], err)
 			}
-		}()
+		})
 	}
 	wg.Wait()
 	for _, err := range errs {
@@ -117,11 +113,9 @@ func run(buildDir string) error {
 	}
 
 	for i := range 2 {
-		wg.Add(1)
+		wg.Go(func() {
-		go func() {
-			defer wg.Done()
 			errs[i] = picotool.WaitForBootsel(serials[i], 10*time.Second)
-		}()
+		})
 	}
 	wg.Wait()
 	for i, err := range errs {
@@ -137,11 +131,9 @@ func run(buildDir string) error {
 
 	fmt.Println("Loading firmware...")
 	for i := range 2 {
-		wg.Add(1)
+		wg.Go(func() {
-		go func() {
-			defer wg.Done()
 			errs[i] = picotool.Load(uf2s[i], serials[i])
-		}()
+		})
 	}
 	wg.Wait()
 	for i, err := range errs {

firmware/firmware.cpp

@@ -51,6 +51,7 @@ int main() {
                 std::copy(uid.id, uid.id + 8, resp.board_id.begin());
                 auto ninfo = w6300::get_net_info();
                 resp.mac = ninfo.mac;
+                resp.link_local = ninfo.lla;
                 usb.send(encode_response(msg->message_id, resp));
                 break;
             }

firmware/include/wire.h

@@ -47,8 +47,9 @@ struct ResponseInfo {
     static constexpr int8_t ext_id = 5;
     std::array<uint8_t, 8> board_id;
     std::array<uint8_t, 6> mac;
-    auto as_tuple() const { return std::tie(board_id, mac); }
+    std::array<uint8_t, 16> link_local;
-    auto as_tuple() { return std::tie(board_id, mac); }
+    auto as_tuple() const { return std::tie(board_id, mac, link_local); }
+    auto as_tuple() { return std::tie(board_id, mac, link_local); }
 };
 
 static constexpr uint8_t hash_key[8] = {};

firmware/lib/net.cpp

@@ -18,6 +18,18 @@ bool net_init() {
     info.mac[3] = uid.id[3];
     info.mac[4] = uid.id[4];
     info.mac[5] = uid.id[5];
+
+    info.lla[0] = 0xfe;
+    info.lla[1] = 0x80;
+    info.lla[8] = info.mac[0] ^ 0x02;
+    info.lla[9] = info.mac[1];
+    info.lla[10] = info.mac[2];
+    info.lla[11] = 0xff;
+    info.lla[12] = 0xfe;
+    info.lla[13] = info.mac[3];
+    info.lla[14] = info.mac[4];
+    info.lla[15] = info.mac[5];
+
     w6300::init_net(info);
 
     return true;

firmware/test.cpp

@@ -47,6 +47,7 @@ int main() {
                 std::copy(uid.id, uid.id + 8, resp.board_id.begin());
                 auto ninfo = w6300::get_net_info();
                 resp.mac = ninfo.mac;
+                resp.link_local = ninfo.lla;
                 usb.send(encode_response(msg->message_id, resp));
                 break;
             }

lib/client/types.go

@@ -9,6 +9,7 @@ type RequestInfo struct{}
 type ResponseInfo struct {
 	BoardID   [8]byte
 	MAC       [6]byte
+	LinkLocal [16]byte
 }
 
 type DeviceError struct {