static int
__ni_dhcp4_build_msg_put_client_id(const ni_dhcp4_device_t *dev, unsigned int msg_code,
ni_dhcp4_message_t *message, ni_buffer_t *msgbuf)
{
const ni_dhcp4_config_t *options = dev->config;
if (options->client_id.len) {
ni_dhcp4_option_put(msgbuf, DHCP4_CLIENTID,
options->client_id.data,
options->client_id.len);
ni_debug_verbose(NI_LOG_DEBUG1, NI_TRACE_DHCP,
"%s: using client-id: %s", dev->ifname,
ni_print_hex(options->client_id.data,
options->client_id.len));
} else
if (!message->hwlen) {
ni_error("%s: cannot construct %s without usable hw-addr and client-id",
dev->ifname, ni_dhcp4_message_name(msg_code));
return -1;
} else {
return 1; /* skipped client-id */
}
return 0;
}
static int
__ni_dhcp4_build_msg_put_hwspec(const ni_dhcp4_device_t *dev, ni_dhcp4_message_t *message)
{
switch (dev->system.hwaddr.type) {
case ARPHRD_ETHER:
case ARPHRD_IEEE802:
if (dev->system.hwaddr.len && dev->system.hwaddr.len <= sizeof(message->chaddr)) {
message->hwlen = dev->system.hwaddr.len;
memcpy(&message->chaddr, dev->system.hwaddr.data, dev->system.hwaddr.len);
}
break;
case ARPHRD_IEEE1394:
case ARPHRD_INFINIBAND:
/* See http://tools.ietf.org/html/rfc4390
*
* Note: set the ciaddr before if needed.
*/
message->hwlen = 0;
if (message->ciaddr == 0)
message->flags = htons(BROADCAST_FLAG);
break;
default:
ni_error("%s: dhcp4 unsupported hardware type %s (0x%x)", dev->ifname,
ni_arphrd_type_to_name(dev->system.hwaddr.type),
dev->system.hwaddr.type);
return -1;
}
if (message->hwlen) {
ni_debug_verbose(NI_LOG_DEBUG1, NI_TRACE_DHCP,
"%s: using hw-address[%u]: %s", dev->ifname,
message->hwtype, ni_print_hex(message->chaddr, message->hwlen));
}
if (message->flags & htons(BROADCAST_FLAG)) {
ni_debug_verbose(NI_LOG_DEBUG1, NI_TRACE_DHCP,
"%s: using broadcast response flag", dev->ifname);
}
return 0;
}
/*
* Process a request to reconfigure the device (ie rebind a lease, or discover
* a new lease).
*/
int
ni_dhcp4_acquire(ni_dhcp4_device_t *dev, const ni_dhcp4_request_t *info)
{
ni_dhcp4_config_t *config;
const char *classid;
size_t len;
int rv;
if ((rv = ni_dhcp4_device_refresh(dev)) < 0)
return rv;
config = xcalloc(1, sizeof(*config));
config->dry_run = info->dry_run;
config->resend_timeout = NI_DHCP4_RESEND_TIMEOUT_INIT;
config->request_timeout = info->acquire_timeout?: NI_DHCP4_REQUEST_TIMEOUT;
config->initial_discovery_timeout = NI_DHCP4_DISCOVERY_TIMEOUT;
config->uuid = info->uuid;
config->flags = info->flags;
config->update = info->update;
config->route_priority = info->route_priority;
config->start_delay = info->start_delay;
config->recover_lease = info->recover_lease;
config->release_lease = info->release_lease;
config->max_lease_time = ni_dhcp4_config_max_lease_time();
if (config->max_lease_time == 0)
config->max_lease_time = ~0U;
if (info->lease_time && info->lease_time < config->max_lease_time)
config->max_lease_time = info->lease_time;
if ((len = ni_string_len(info->hostname)) > 0) {
if (ni_check_domain_name(info->hostname, len, 0)) {
strncpy(config->hostname, info->hostname, sizeof(config->hostname) - 1);
} else {
ni_debug_dhcp("Discarded request to use suspect hostname: '%s'",
ni_print_suspect(info->hostname, len));
}
}
if (info->clientid) {
ni_dhcp4_parse_client_id(&config->client_id, dev->system.hwaddr.type,
info->clientid);
} else {
/* Set client ID from interface hwaddr */
ni_dhcp4_set_client_id(&config->client_id, &dev->system.hwaddr);
}
if ((classid = info->vendor_class) == NULL)
classid = ni_dhcp4_config_vendor_class();
if (classid)
strncpy(config->classid, classid, sizeof(config->classid) - 1);
config->doflags = DHCP4_DO_DEFAULT;
config->doflags |= ni_dhcp4_do_bits(info->update);
if (ni_debug & NI_TRACE_DHCP) {
ni_trace("Received request:");
ni_trace(" acquire-timeout %u", config->request_timeout);
ni_trace(" lease-time %u", config->max_lease_time);
ni_trace(" start-delay %u", config->start_delay);
ni_trace(" hostname %s", config->hostname[0]? config->hostname : "<none>");
ni_trace(" vendor-class %s", config->classid[0]? config->classid : "<none>");
ni_trace(" client-id %s", ni_print_hex(config->client_id.data, config->client_id.len));
ni_trace(" uuid %s", ni_uuid_print(&config->uuid));
ni_trace(" update-flags %s", __ni_dhcp4_print_doflags(config->doflags));
ni_trace(" recover_lease %s", config->recover_lease ? "true" : "false");
ni_trace(" release_lease %s", config->release_lease ? "true" : "false");
}
ni_dhcp4_device_set_config(dev, config);
if (!dev->lease)
ni_dhcp4_recover_lease(dev);
if (dev->lease) {
if (!ni_addrconf_lease_is_valid(dev->lease)
|| (config->client_id.len && !ni_opaque_eq(&config->client_id, &dev->lease->dhcp4.client_id))) {
ni_debug_dhcp("%s: lease doesn't match request", dev->ifname);
ni_dhcp4_device_drop_lease(dev);
dev->notify = 1;
}
}
ni_note("%s: Request to acquire DHCPv4 lease with UUID %s",
dev->ifname, ni_uuid_print(&config->uuid));
if (ni_dhcp4_device_start(dev) < 0)
return -1;
return 1;
}