* Also report the address index back to the userland.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38059 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/network/stack/datalink.cpp

@@ -788,14 +788,24 @@ interface_protocol_control(net_datalink_protocol* _protocol, int32 option,
 					address = interface->FirstForFamily(
 						protocol->domain->family);
 				}
+
+				request.ifra_index = interface->IndexOfAddress(address);
 			} else
 				address = interface->AddressAt(request.ifra_index);
 			if (address == NULL)
 				return B_BAD_VALUE;
 
-			status_t status = fill_address(address->local,
-				(sockaddr*)&((struct ifaliasreq*)argument)->ifra_addr,
-				sizeof(sockaddr_storage));
+			// Copy index (in case none was specified)
+			status_t status = user_memcpy(
+				&((struct ifaliasreq*)argument)->ifra_index,
+				&request.ifra_index, sizeof(request.ifra_index));
+
+			// Copy address info
+			if (status == B_OK) {
+				status = fill_address(address->local,
+					(sockaddr*)&((struct ifaliasreq*)argument)->ifra_addr,
+					sizeof(sockaddr_storage));
+			}
 			if (status == B_OK) {
 				status = fill_address(address->mask,
 					(sockaddr*)&((struct ifaliasreq*)argument)->ifra_mask,

src/add-ons/kernel/network/stack/interfaces.cpp

@@ -638,6 +638,25 @@ Interface::AddressAt(size_t index)
 }
 
 
+int32
+Interface::IndexOfAddress(InterfaceAddress* address)
+{
+	RecursiveLocker locker(fLock);
+	
+	AddressList::Iterator iterator = fAddresses.GetIterator();
+	int32 index = 0;
+	
+	while (iterator.HasNext()) {
+		if (address == iterator.Next())
+			return index;
+
+		index++;
+	}
+
+	return -1;
+}
+
+
 size_t
 Interface::CountAddresses()
 {

src/add-ons/kernel/network/stack/interfaces.h

@@ -129,6 +129,7 @@ public:
 			void				RemoveAddress(InterfaceAddress* address);
 			bool				GetNextAddress(InterfaceAddress** _address);
 			InterfaceAddress*	AddressAt(size_t index);
+			int32				IndexOfAddress(InterfaceAddress* address);
 			size_t				CountAddresses();
 			void				RemoveAddresses();