sys/linux: add ieee802154 descriptions

3 files changed, 15 insertions, 0 deletions

diff --git a/pkg/host/features.go b/pkg/host/features.go
index 14d4f5c89..d7012e918 100644
--- a/pkg/host/features.go
+++ b/pkg/host/features.go
@@ -29,6 +29,7 @@ const (
 	FeatureUSBEmulation
 	FeatureVhciInjection
 	FeatureWifiEmulation
+	Feature802154Emulation
 	numFeatures
 )
 
@@ -69,6 +70,7 @@ func Check(target *prog.Target) (*Features, error) {
 		FeatureUSBEmulation:     {Name: "USB emulation", Reason: unsupported},
 		FeatureVhciInjection:    {Name: "hci packet injection", Reason: unsupported},
 		FeatureWifiEmulation:    {Name: "wifi device emulation", Reason: unsupported},
+		Feature802154Emulation:  {Name: "802.15.4 emulation", Reason: unsupported},
 	}
 	if noHostChecks(target) {
 		return res, nil
@@ -111,6 +113,9 @@ func Setup(target *prog.Target, features *Features, featureFlags csource.Feature
 	if features[FeatureUSBEmulation].Enabled {
 		args = append(args, "usb")
 	}
+	if featureFlags["ieee802154"].Enabled && features[Feature802154Emulation].Enabled {
+		args = append(args, "802154")
+	}
 	_, err := osutil.RunCmd(5*time.Minute, "", executor, args...)
 	return err
 }
diff --git a/pkg/host/features_linux.go b/pkg/host/features_linux.go
index fc925c00c..5c45bdcc1 100644
--- a/pkg/host/features_linux.go
+++ b/pkg/host/features_linux.go
@@ -33,6 +33,7 @@ func init() {
 	checkFeature[FeatureUSBEmulation] = checkUSBEmulation
 	checkFeature[FeatureVhciInjection] = checkVhciInjection
 	checkFeature[FeatureWifiEmulation] = checkWifiEmulation
+	checkFeature[Feature802154Emulation] = check802154Emulation
 }
 
 func checkCoverage() string {
@@ -233,6 +234,13 @@ func checkWifiEmulation() string {
 	return requireKernel(4, 17)
 }
 
+func check802154Emulation() string {
+	if err := osutil.IsAccessible("/sys/bus/platform/devices/mac802154_hwsim"); err != nil {
+		return err.Error()
+	}
+	return ""
+}
+
 func requireKernel(x, y int) string {
 	info := new(unix.Utsname)
 	if err := unix.Uname(info); err != nil {
diff --git a/pkg/host/syscalls_linux.go b/pkg/host/syscalls_linux.go
index e31e0dc24..a13af0caa 100644
--- a/pkg/host/syscalls_linux.go
+++ b/pkg/host/syscalls_linux.go
@@ -223,9 +223,11 @@ func isSyzGenetlinkGetFamilyIDSupported(c *prog.Syscall, target *prog.Target, sa
 	if fd == -1 {
 		return false, fmt.Sprintf("socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) failed: %v", err)
 	}
+	// TODO: try to obtain actual family ID here. It will disable whole sets of sendmsg syscalls.
 	syscall.Close(fd)
 	return true, ""
 }
+
 func isSyzMountImageSupported(c *prog.Syscall, target *prog.Target, sandbox string) (bool, string) {
 	if ok, reason := onlySandboxNone(sandbox); !ok {
 		return ok, reason