From 1c56213cbe983825418c11c2c09335a10b160bd4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=96=E7=95=8C?= <i@sekai.icu>
Date: Sat, 25 Jan 2025 19:02:41 +0800
Subject: [PATCH] Add `ip_accept_any` DNS rule action

---
 option/rule_dns.go                    |  1 +
 route/rule/rule_dns.go                |  5 +++++
 route/rule/rule_item_ip_accept_any.go | 21 +++++++++++++++++++++
 3 files changed, 27 insertions(+)
 create mode 100644 route/rule/rule_item_ip_accept_any.go

diff --git a/option/rule_dns.go b/option/rule_dns.go
index b437eb54..9d6fb138 100644
--- a/option/rule_dns.go
+++ b/option/rule_dns.go
@@ -83,6 +83,7 @@ type RawDefaultDNSRule struct {
 	GeoIP                    badoption.Listable[string]        `json:"geoip,omitempty"`
 	IPCIDR                   badoption.Listable[string]        `json:"ip_cidr,omitempty"`
 	IPIsPrivate              bool                              `json:"ip_is_private,omitempty"`
+	IPAcceptAny              bool                              `json:"ip_accept_any,omitempty"`
 	SourceIPCIDR             badoption.Listable[string]        `json:"source_ip_cidr,omitempty"`
 	SourceIPIsPrivate        bool                              `json:"source_ip_is_private,omitempty"`
 	SourcePort               badoption.Listable[uint16]        `json:"source_port,omitempty"`
diff --git a/route/rule/rule_dns.go b/route/rule/rule_dns.go
index 37712928..087fb7b2 100644
--- a/route/rule/rule_dns.go
+++ b/route/rule/rule_dns.go
@@ -145,6 +145,11 @@ func NewDefaultDNSRule(ctx context.Context, logger log.ContextLogger, options op
 		rule.destinationIPCIDRItems = append(rule.destinationIPCIDRItems, item)
 		rule.allItems = append(rule.allItems, item)
 	}
+	if options.IPAcceptAny {
+		item := NewIPAcceptAnyItem()
+		rule.destinationIPCIDRItems = append(rule.destinationIPCIDRItems, item)
+		rule.allItems = append(rule.allItems, item)
+	}
 	if len(options.SourcePort) > 0 {
 		item := NewPortItem(true, options.SourcePort)
 		rule.sourcePortItems = append(rule.sourcePortItems, item)
diff --git a/route/rule/rule_item_ip_accept_any.go b/route/rule/rule_item_ip_accept_any.go
new file mode 100644
index 00000000..1ca71257
--- /dev/null
+++ b/route/rule/rule_item_ip_accept_any.go
@@ -0,0 +1,21 @@
+package rule
+
+import (
+	"github.com/sagernet/sing-box/adapter"
+)
+
+var _ RuleItem = (*IPAcceptAnyItem)(nil)
+
+type IPAcceptAnyItem struct{}
+
+func NewIPAcceptAnyItem() *IPAcceptAnyItem {
+	return &IPAcceptAnyItem{}
+}
+
+func (r *IPAcceptAnyItem) Match(metadata *adapter.InboundContext) bool {
+	return len(metadata.DestinationAddresses) > 0
+}
+
+func (r *IPAcceptAnyItem) String() string {
+	return "ip_accept_any=true"
+}