void
ni_dhcp4_device_free(ni_dhcp4_device_t *dev)
{
ni_dhcp4_device_t **pos;
ni_assert(dev->users == 0);
ni_debug_dhcp("%s: Deleting dhcp4 device with index %u",
dev->ifname, dev->link.ifindex);
ni_dhcp4_device_drop_buffer(dev);
ni_dhcp4_device_drop_lease(dev);
ni_dhcp4_device_drop_best_offer(dev);
ni_dhcp4_device_close(dev);
ni_string_free(&dev->system.ifname);
ni_string_free(&dev->ifname);
/* Drop existing config and request */
ni_dhcp4_device_set_config(dev, NULL);
ni_dhcp4_device_set_request(dev, NULL);
for (pos = &ni_dhcp4_active; *pos; pos = &(*pos)->next) {
if (*pos == dev) {
*pos = dev->next;
break;
}
}
free(dev);
}
int
__ni_dhcp4_fsm_discover(ni_dhcp4_device_t *dev, int scan_offers)
{
ni_addrconf_lease_t *lease;
int rv;
ni_info("%s: Initiating DHCPv4 discovery (ifindex %d)", dev->ifname, dev->link.ifindex);
/* If we already have a lease, try asking for the same.
* If not, create a dummy lease with NULL fields.
* Note: if DISCOVER for the old lease times out,
* we should fall back to asking for anything.
*/
if ((lease = dev->lease) == NULL)
lease = ni_addrconf_lease_new(NI_ADDRCONF_DHCP, AF_INET);
lease->uuid = dev->config->uuid;
dev->fsm.state = NI_DHCP4_STATE_SELECTING;
rv = ni_dhcp4_device_send_message(dev, DHCP4_DISCOVER, lease);
dev->dhcp4.accept_any_offer = 1;
ni_debug_dhcp("valid lease: %d; have prefs: %d",
ni_addrconf_lease_is_valid(dev->lease),
ni_dhcp4_config_have_server_preference());
if (ni_addrconf_lease_is_valid(dev->lease)
|| (scan_offers && ni_dhcp4_config_have_server_preference())) {
ni_dhcp4_fsm_set_timeout(dev, dev->config->initial_discovery_timeout);
dev->dhcp4.accept_any_offer = 0;
} else {
ni_dhcp4_fsm_set_timeout(dev, dev->config->request_timeout);
}
ni_dhcp4_device_drop_best_offer(dev);
if (lease != dev->lease)
ni_addrconf_lease_free(lease);
return rv;
}
