netutil

func LocalIPv4 ¶

func LocalIPv4() string

LocalIPv4 returns the first non-loopback IPv4 address of the local machine.

The result is cached after the first call using sync.Once, so subsequent calls are fast. If no non-loopback IPv4 address is found, "0.0.0.0" is returned.

Note:

• Only IPv4 addresses are considered; IPv6 addresses are ignored.
• The result does not update if the network interfaces change after the first call.
• For more robust use, consider returning (string, error) to handle the case where no valid IPv4 address is available.