nrf_setdnsaddr()

int nrf_setdnsaddr	(	int	family,
		const void *	in_addr,
		nrf_socklen_t	in_size )

#include <nrf_modem/include/nrf_socket.h>

Set or unset a fallback DNS address.

The fallback DNS address is used only when the network-provided DNS addresses are missing or unreachable. The fallback DNS does not override the network-provided DNS.

Parameters

family	Address family, either NRF_AF_INET or NRF_AF_INET6.
in_addr	An IPv4 or IPv6 address encoded in a nrf_in_addr or nrf_in6_addr structure, respectively. To unset the fallback DNS address, in_addr must be NULL.
in_size	Size of the structure pointed to by in_addr. To unset the fallback DNS address, in_size must be 0 (when in_addr is NULL).

Return values

0	On success
-1	On error, and set errno to indicate the reason.

The function may return -1 and set the following errno:

• [NRF_EPERM] The Modem library is not initialized.
• [NRF_EINVAL] Invalid parameters.
• [NRF_EAFNOSUPPORT] The implementation does not support the specified address family.
• [NRF_ENOBUFS] Not enough shared memory for this request.
• [NRF_ESHUTDOWN] Modem was shut down.