Setting DNS server IP addresses

[errordeveloper]

I was not able to figure out how to set the neserver IP address(es), seems like this is currently not exposed.

[adamgreen]

I didn't see anything exposed from the C++ wrapper classes but lwIP supports the following C API that you should be able to use:

    void dns_setserver(u8_t numdns, ip_addr_t *dnsserver);

Set numdns to 0 to set the primary DNS server address.

Example:

#include <lwip/dns.h>

int main(void) {
    // …

    // Set primary DNS to resolver1.opendns.com
    ip_addr_t primaryDnsServer;
    ip4_addr_set_u32(&primaryDnsServer, ipaddr_addr("208.67.222.222"));
    dns_setserver(0, &primaryDnsServer);

    // …
}

[mbednotifications]

I suppose it would be best to actually expose it. Should it be a separate
method or optional initialisation argument?
Separate method would make sense to me, but optional argument is perfectly
fine too...
On 31 Oct 2013 23:54, "Adam Green" notifications@github.com wrote:

I didn't see anything exposed from the C++ wrapper classes but lwIP
supports the following C API that you should be able to use:

void dns_setserver(u8_t numdns, ip_addr_t *dnsserver);

Set numdns to 0 to set the primary DNS server address.

Example:

#include <lwip/dns.h>
int main(void) {
// …

// Set primary DNS to resolver1.opendns.com
ip_addr_t primaryDnsServer;
ip4_addr_set_u32(&primaryDnsServer, ipaddr_addr("208.67.222.222"));
dns_setserver(0, &primaryDnsServer);

// …}

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[adamgreen]

I don't know who I am replying to here (mbednotifications) but here is my response anyway :)

I prefer the separate method as well. lwIP does default the primary DNS server to be the opendns one I used in my example above.

[errordeveloper]

Ah, I made that mistake again... It was my reply. So OK, I'll add a separate method when I have a moment.

[ciarmcom]

ARM Internal Ref: IOTMORF-329

[sg-]

@geky Is this resolved with the updated DNS query?

[geky]

Yes, though given the date, I'm assuming this issue was raised about the old EthernetInterface?

[sg-]

Updated with new EthernetInterface.