comboot_resolv.c

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#include <errno.h>
#include <comboot.h>
#include <gpxe/in.h>
#include <gpxe/list.h>
#include <gpxe/process.h>
#include <gpxe/resolv.h>

FILE_LICENCE ( GPL2_OR_LATER );

static int comboot_resolv_rc;
static struct in_addr comboot_resolv_addr;

static void comboot_resolv_done ( struct resolv_interface *resolv,
                                  struct sockaddr *sa, int rc ) {
        struct sockaddr_in *sin;

        resolv_unplug ( resolv );

        if ( rc != 0 ) {
                comboot_resolv_rc = rc;
                return;
        }

        if ( sa->sa_family != AF_INET ) {
                comboot_resolv_rc = -EAFNOSUPPORT;
                return;
        }

        sin = ( ( struct sockaddr_in * ) sa );
        comboot_resolv_addr = sin->sin_addr;

        comboot_resolv_rc = 0;
}

static struct resolv_interface_operations comboot_resolv_ops = {
        .done = comboot_resolv_done,
};

static struct resolv_interface comboot_resolver = {
        .intf = {
                .dest = &null_resolv.intf,
                .refcnt = NULL,
        },
        .op = &comboot_resolv_ops,
};

int comboot_resolv ( const char *name, struct in_addr *address ) {
        int rc;

        comboot_resolv_rc = -EINPROGRESS;

        if ( ( rc = resolv ( &comboot_resolver, name, NULL ) ) != 0 )
                return rc;

        while ( comboot_resolv_rc == -EINPROGRESS )
                step();

        *address = comboot_resolv_addr;
        return comboot_resolv_rc;
}