add policy posture checks

management/server/checks/posture_checks.go

@@ -0,0 +1,42 @@
+package checks
+
+import (
+	"fmt"
+
+	nbpeer "github.com/netbirdio/netbird/management/server/peer"
+)
+
+type PostureCheck struct {
+	// ID of the policy rule
+	ID string `gorm:"primaryKey"`
+
+	// PolicyID is a reference to Policy that this object belongs
+	PolicyID string `json:"-" gorm:"index"`
+
+	NBVersionCheck NBVersionPostureCheck `gorm:"embedded;embeddedPrefix:nb_version_check_"`
+	OSVersionCheck OSVersionPostureCheck `gorm:"embedded;embeddedPrefix:os_version_check_"`
+}
+
+type NBVersionPostureCheck struct {
+	Enabled               bool
+	MinimumVersionAllowed string
+}
+
+func (n *NBVersionPostureCheck) Check(peer nbpeer.Peer) error {
+	if peer.Meta.WtVersion >= n.MinimumVersionAllowed {
+		return nil
+	}
+	return fmt.Errorf("peer nb version is not supported")
+}
+
+type OSVersionPostureCheck struct {
+	Enabled               bool
+	MinimumVersionAllowed string
+}
+
+func (o *OSVersionPostureCheck) Check(peer nbpeer.Peer) error {
+	if peer.Meta.WtVersion >= o.MinimumVersionAllowed {
+		return nil
+	}
+	return fmt.Errorf("peer OS version is not supported")
+}