syscall: Rename NetServiceAttr to NetPortAttr

This was originally named in line with an earlier, unstable version of
the networking support, and I missed to update it.  We do not give
backwards compatibility guarantees on the syscall module, but I
was unable to find direct dependencies on it on the internet.

If this breaks you, please reach out with a Github issue.

landlock/net_opt.go

@@ -45,11 +45,11 @@ func (n NetRule) compatibleWithConfig(c Config) bool {
 
 func (n NetRule) addToRuleset(rulesetFD int, c Config) error {
 	flags := 0
-	attr := &ll.NetServiceAttr{
+	attr := &ll.NetPortAttr{
 		AllowedAccess: uint64(n.access),
 		Port:          n.port,
 	}
-	return ll.LandlockAddNetServiceRule(rulesetFD, attr, flags)
+	return ll.LandlockAddNetPortRule(rulesetFD, attr, flags)
 }
 
 func (n NetRule) downgrade(c Config) (out Rule, ok bool) {

landlock/syscall/landlock.go

@@ -72,8 +72,8 @@ type PathBeneathAttr struct {
 	ParentFd int
 }
 
-// NetServiceAttr specifies which ports can be used for what.
-type NetServiceAttr struct {
+// NetPortAttr specifies which ports can be used for what.
+type NetPortAttr struct {
 	AllowedAccess uint64
 	Port          uint16
 }

landlock/syscall/syscall_linux.go

@@ -34,7 +34,7 @@ func LandlockGetABIVersion() (version int, err error) {
 // Landlock rule types.
 const (
 	RuleTypePathBeneath = unix.LANDLOCK_RULE_PATH_BENEATH
-	RuleTypeNetService  = 2 // TODO: Use it from sys/unix when available.
+	RuleTypeNetPort     = 2 // TODO: Use it from sys/unix when available.
 )
 
 // LandlockAddPathBeneathRule adds a rule of type "path beneath" to
@@ -44,10 +44,10 @@ func LandlockAddPathBeneathRule(rulesetFd int, attr *PathBeneathAttr, flags int)
 	return LandlockAddRule(rulesetFd, RuleTypePathBeneath, unsafe.Pointer(attr), flags)
 }
 
-// LandlockAddNetServiceRule adds a rule of type "net service" to the given ruleset FD.
+// LandlockAddNetPortRule adds a rule of type "net port" to the given ruleset FD.
 // attr defines the rule parameters. flags must currently be 0.
-func LandlockAddNetServiceRule(rulesetFD int, attr *NetServiceAttr, flags int) error {
-	return LandlockAddRule(rulesetFD, RuleTypeNetService, unsafe.Pointer(attr), flags)
+func LandlockAddNetPortRule(rulesetFD int, attr *NetPortAttr, flags int) error {
+	return LandlockAddRule(rulesetFD, RuleTypeNetPort, unsafe.Pointer(attr), flags)
 }
 
 // LandlockAddRule is the generic landlock_add_rule syscall.

landlock/syscall/syscall_nonlinux.go

@@ -23,7 +23,7 @@ func LandlockAddPathBeneathRule(rulesetFd int, attr *PathBeneathAttr, flags int)
 	return syscall.ENOSYS
 }
 
-func LandlockAddNetServiceRule(rulesetFD int, attr *NetServiceAttr, flags int) error {
+func LandlockAddNetPortRule(rulesetFD int, attr *NetServiceAttr, flags int) error {
 	return syscall.ENOSYS
 }