IPv6 Stateless Address Auto-Configuration Hook Function

Description

This hook function, if set, will be called each time a IPv6 address auto-configuration process ends.

Prototype

          void  NetIPv6_AutoCfgHookFnct(       NET_IF_NBR                 if_nbr,
                                        const  NET_IPv6_ADDR             *p_addr_local_cfgd,
	                                    const  NET_IPv6_ADDR             *p_addr_global_cfgd,
                                               NET_IPv6_AUTO_CFG_STATUS   auto_cfg_result);

Arguments

if_nbr

Network Interface number on which Auto-Configuration took place.

p_addr_local_cfgd

Pointer to IPv6 link-local address configured, if any.
DEF_NULL, otherwise.

p_addr_global_cfgd

Pointer to IPv6 global address configured, if any.
DEF_NULL, otherwise.

auto_cfg_result

Result status of the IPv6 Address Auto-Configuration process.

Return Values

None.

Required Configuration

NET_IPv6_CFG_ADDR_AUTO_CFG_EN macro must be enabled in the net_cfg.h file.

Notes / Warnings

p_addr_local_cfgd and p_addr_global_cfgd are for read-only. They must not be modified at any point in this hook function.

This hook function is called with the Network Lock already acquired, therefore no network API functions can be called will inside this hook function.

Example Template

Below, Listing - IPv6 Auto-Configuration Hook Function Example Code shows a possible implementation of the hook function. That code simply print in the debug console the IPv6 addresses configured and the final result of the IPv6 Auto-Configuration process.

Listing - IPv6 Auto-Configuration Hook Function Example Code

#if (NET_IPv6_CFG_ADDR_AUTO_CFG_EN == DEF_ENABLED)        
static  void  App_AutoCfgResult(      NET_IF_NBR                 if_nbr,
                                const NET_IPv6_ADDR             *p_addr_local,
                                const NET_IPv6_ADDR             *p_addr_global,
                                      NET_IPv6_AUTO_CFG_STATUS   auto_cfg_result)
{
    CPU_CHAR  ip_string[NET_ASCII_LEN_MAX_ADDR_IPv6];
    NET_ERR   err_net;
    
    if (p_addr_local != DEF_NULL) {
        NetASCII_IPv6_to_Str(p_addr_local, ip_string, DEF_NO, DEF_YES, &err_net);
        APP_TRACE_INFO(("IPv6 Address Link Local: %s\n", ip_string));
    }
    if (p_addr_global != DEF_NULL) {
        NetASCII_IPv6_to_Str(p_addr_global, ip_string, DEF_NO, DEF_YES, &err_net);
        APP_TRACE_INFO(("IPv6 Address Global: %s\n", ip_string));
    }
    switch (auto_cfg_result) {
        case NET_IPv6_AUTO_CFG_STATUS_FAILED:
             APP_TRACE_INFO(("Auto-Configuration failed.\n"));
             break;

        case NET_IPv6_AUTO_CFG_STATUS_SUCCEEDED:
             APP_TRACE_INFO(("Auto-Configuration succeeded.\n"));
             break;

        case NET_IPv6_AUTO_CFG_STATUS_LINK_LOCAL:
             APP_TRACE_INFO(("Auto-Configuration with Link-Local address only.\n"));
             break;

        default:
             APP_TRACE_INFO(("Invalid Auto-Configuration result.\n"));
             break;
    }
}
#endif

µC/TCP-IP Documentation