feat: add address to NIC

app/tun/config.proto

@@ -7,7 +7,7 @@ option java_package = "com.v2ray.core.app.tun";
 option java_multiple_files = true;
 
 
-// import "app/router/routercommon/common.proto";
+import "app/router/routercommon/common.proto";
 import "common/net/packetaddr/config.proto";
 import "common/protoext/extensions.proto";
 
@@ -21,4 +21,5 @@ message Config {
     uint32 user_level = 3;
     v2ray.core.net.packetaddr.PacketAddrType packet_encoding = 4;
     string tag = 6;
+    repeated v2ray.core.app.router.routercommon.CIDR ips = 7;
 }

app/tun/nic.go

@@ -1,7 +1,10 @@
 package tun
 
 import (
+	"github.com/v2fly/v2ray-core/v5/app/router/routercommon"
 	"gvisor.dev/gvisor/pkg/tcpip"
+	"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
+	"gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
 	"gvisor.dev/gvisor/pkg/tcpip/stack"
 )
 
@@ -17,3 +20,32 @@ func CreateNIC(nicID tcpip.NICID, linkEndpoint stack.LinkEndpoint) StackOption {
 		return nil
 	}
 }
+
+func AddProtocolAddress(id tcpip.NICID, ips []*routercommon.CIDR) StackOption {
+	return func(s *stack.Stack) error {
+		for _, ip := range ips {
+			tcpIpAddr := tcpip.AddrFrom4Slice(ip.Ip)
+			protocolAddress := tcpip.ProtocolAddress{
+				AddressWithPrefix: tcpip.AddressWithPrefix{
+					Address:   tcpIpAddr,
+					PrefixLen: int(ip.Prefix),
+				},
+			}
+
+			switch tcpIpAddr.Len() {
+			case 4:
+				protocolAddress.Protocol = ipv4.ProtocolNumber
+			case 16:
+				protocolAddress.Protocol = ipv6.ProtocolNumber
+			default:
+				return newError("invalid IP address length:", tcpIpAddr.Len())
+			}
+
+			if err := s.AddProtocolAddress(id, protocolAddress, stack.AddressProperties{}); err != nil {
+				return newError("failed to add protocol address:", err)
+			}
+		}
+
+		return nil
+	}
+}

app/tun/stack.go

@@ -33,6 +33,7 @@ func (t *TUN) CreateStack(linkedEndpoint stack.LinkEndpoint) (*stack.Stack, erro
 		SetUDPHandler(t.ctx, t.dispatcher, t.policyManager, t.config),
 
 		CreateNIC(nicID, linkedEndpoint),
+		AddProtocolAddress(nicID, t.config.Ips),
 	}
 
 	for _, opt := range opts {