esp_netif_ip_info_t struct

Get interface's IP address information If the interface is up, IP information is read directly from the TCP/IP stack. If the interface is down, IP information is read from a copy kept in the ESP-NETIF instance

Set interface's IP address information This function is mainly used to set a static IP on an interface. If the interface is up, the new IP information is set directly in the TCP/IP stack. The copy of IP information kept in the ESP-NETIF instance is also updated (this copy is returned if the IP is queried while the interface is still down.)

Set interface old IP information This function is called from the DHCP client (if enabled), before a new IP is set. It is also called from the default handlers for the SYSTEM_EVENT_STA_CONNECTED and SYSTEM_EVENT_ETH_CONNECTED events. Calling this function stores the previously configured IP, which can be used to determine if the IP changes in the future. If the interface is disconnected or down for too long, the "IP lost timer" will expire (after the configured interval) and set the old IP information to zero.

Get interface's old IP information Returns an "old" IP address previously stored for the interface when the valid IP changed. If the IP lost timer has expired (meaning the interface was down for longer than the configured interval) then the old IP information will be zero.

Returns true if underlying TCP/IP stack finds the ip_info as valid static address