| lwIP
    2.1.2
    Lightweight IP stack | 
#include <netif.h>
| Data Fields | |
| s8_t | addr_index | 
| const ip_addr_t * | old_address | 
Args to LWIP_NSC_IPV6_SET callback
| s8_t netif_ext_callback_args_t::ipv6_set_s::addr_index | 
Index of changed IPv6 address
| const ip_addr_t* netif_ext_callback_args_t::ipv6_set_s::old_address | 
Old IPv6 address