static int dhcp4_set_hostname(Link *link) {
_cleanup_free_ char *hostname = NULL;
const char *hn;
int r;
assert(link);
if (!link->network->dhcp_send_hostname)
hn = NULL;
else if (link->network->dhcp_hostname)
hn = link->network->dhcp_hostname;
else {
r = gethostname_strict(&hostname);
if (r < 0 && r != -ENXIO) /* ENXIO: no hostname set or hostname is "localhost" */
return r;
hn = hostname;
}
r = sd_dhcp_client_set_hostname(link->dhcp_client, hn);
if (r == -EINVAL && hostname)
/* Ignore error when the machine's hostname is not suitable to send in DHCP packet. */
log_link_warning_errno(link, r, "DHCP4 CLIENT: Failed to set hostname from kernel hostname, ignoring: %m");
else if (r < 0)
return log_link_error_errno(link, r, "DHCP4 CLIENT: Failed to set hostname: %m");
return 0;
}
static int dhcp4_set_hostname(Link *link) {
_cleanup_free_ char *hostname = NULL;
const char *hn;
int r;
assert(link);
if (!link->network->dhcp_send_hostname)
hn = NULL;
else if (link->network->dhcp_hostname)
hn = link->network->dhcp_hostname;
else {
r = gethostname_strict(&hostname);
if (r < 0 && r != -ENXIO) /* ENXIO: no hostname set or hostname is "localhost" */
return r;
hn = hostname;
}
return sd_dhcp_client_set_hostname(link->dhcp_client, hn);
}
static void test_request_basic(sd_event *e) {
int r;
sd_dhcp_client *client;
if (verbose)
printf("* %s\n", __FUNCTION__);
/* Initialize client without Anonymize settings. */
r = sd_dhcp_client_new(&client, false);
assert_se(r >= 0);
assert_se(client);
r = sd_dhcp_client_attach_event(client, e, 0);
assert_se(r >= 0);
assert_se(sd_dhcp_client_set_request_option(NULL, 0) == -EINVAL);
assert_se(sd_dhcp_client_set_request_address(NULL, NULL) == -EINVAL);
assert_se(sd_dhcp_client_set_ifindex(NULL, 0) == -EINVAL);
assert_se(sd_dhcp_client_set_ifindex(client, 15) == 0);
assert_se(sd_dhcp_client_set_ifindex(client, -42) == -EINVAL);
assert_se(sd_dhcp_client_set_ifindex(client, -1) == -EINVAL);
assert_se(sd_dhcp_client_set_ifindex(client, 0) == -EINVAL);
assert_se(sd_dhcp_client_set_ifindex(client, 1) == 0);
assert_se(sd_dhcp_client_set_hostname(client, "host") == 1);
assert_se(sd_dhcp_client_set_hostname(client, "host.domain") == 1);
assert_se(sd_dhcp_client_set_hostname(client, NULL) == 1);
assert_se(sd_dhcp_client_set_hostname(client, "~host") == -EINVAL);
assert_se(sd_dhcp_client_set_hostname(client, "~host.domain") == -EINVAL);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_SUBNET_MASK) == -EEXIST);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_ROUTER) == -EEXIST);
/* This PRL option is not set when using Anonymize, but in this test
* Anonymize settings are not being used. */
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_HOST_NAME) == -EEXIST);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_DOMAIN_NAME) == -EEXIST);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_DOMAIN_NAME_SERVER) == -EEXIST);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_PAD) == -EINVAL);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_END) == -EINVAL);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_MESSAGE_TYPE) == -EINVAL);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_OVERLOAD) == -EINVAL);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_PARAMETER_REQUEST_LIST)
== -EINVAL);
/* RFC7844: option 33 (SD_DHCP_OPTION_STATIC_ROUTE) is set in the
* default PRL when using Anonymize, so it is changed to other option
* that is not set by default, to check that it was set successfully.
* Options not set by default (using or not anonymize) are option 17
* (SD_DHCP_OPTION_ROOT_PATH) and 42 (SD_DHCP_OPTION_NTP_SERVER) */
assert_se(sd_dhcp_client_set_request_option(client, 17) == 0);
assert_se(sd_dhcp_client_set_request_option(client, 17) == -EEXIST);
assert_se(sd_dhcp_client_set_request_option(client, 42) == 0);
assert_se(sd_dhcp_client_set_request_option(client, 17) == -EEXIST);
sd_dhcp_client_unref(client);
}
static gboolean
ip4_start (NMDhcpClient *client, const char *dhcp_anycast_addr, const char *last_ip4_address)
{
NMDhcpSystemd *self = NM_DHCP_SYSTEMD (client);
NMDhcpSystemdPrivate *priv = NM_DHCP_SYSTEMD_GET_PRIVATE (self);
const char *iface = nm_dhcp_client_get_iface (client);
const GByteArray *hwaddr;
sd_dhcp_lease *lease = NULL;
GBytes *override_client_id;
const uint8_t *client_id = NULL;
size_t client_id_len = 0;
struct in_addr last_addr = { 0 };
const char *hostname, *fqdn;
int r, i;
gboolean success = FALSE;
guint16 arp_type;
g_assert (priv->client4 == NULL);
g_assert (priv->client6 == NULL);
g_free (priv->lease_file);
priv->lease_file = get_leasefile_path (iface, nm_dhcp_client_get_uuid (client), FALSE);
r = sd_dhcp_client_new (&priv->client4);
if (r < 0) {
_LOGW ("failed to create client (%d)", r);
return FALSE;
}
_LOGT ("dhcp-client4: set %p", priv->client4);
r = sd_dhcp_client_attach_event (priv->client4, NULL, 0);
if (r < 0) {
_LOGW ("failed to attach event (%d)", r);
goto error;
}
hwaddr = nm_dhcp_client_get_hw_addr (client);
if (hwaddr) {
arp_type= get_arp_type (hwaddr);
if (arp_type == ARPHRD_NONE) {
_LOGW ("failed to determine ARP type");
goto error;
}
r = sd_dhcp_client_set_mac (priv->client4,
hwaddr->data,
hwaddr->len,
arp_type);
if (r < 0) {
_LOGW ("failed to set MAC address (%d)", r);
goto error;
}
}
r = sd_dhcp_client_set_index (priv->client4, nm_dhcp_client_get_ifindex (client));
if (r < 0) {
_LOGW ("failed to set ifindex (%d)", r);
goto error;
}
r = sd_dhcp_client_set_callback (priv->client4, dhcp_event_cb, client);
if (r < 0) {
_LOGW ("failed to set callback (%d)", r);
goto error;
}
r = sd_dhcp_client_set_request_broadcast (priv->client4, true);
if (r < 0) {
_LOGW ("failed to enable broadcast mode (%d)", r);
goto error;
}
dhcp_lease_load (&lease, priv->lease_file);
if (last_ip4_address)
inet_pton (AF_INET, last_ip4_address, &last_addr);
else if (lease)
sd_dhcp_lease_get_address (lease, &last_addr);
if (last_addr.s_addr) {
r = sd_dhcp_client_set_request_address (priv->client4, &last_addr);
if (r < 0) {
_LOGW ("failed to set last IPv4 address (%d)", r);
goto error;
}
}
override_client_id = nm_dhcp_client_get_client_id (client);
if (override_client_id) {
client_id = g_bytes_get_data (override_client_id, &client_id_len);
g_assert (client_id && client_id_len);
sd_dhcp_client_set_client_id (priv->client4,
client_id[0],
client_id + 1,
client_id_len - 1);
} else if (lease) {
r = sd_dhcp_lease_get_client_id (lease, (const void **) &client_id, &client_id_len);
if (r == 0 && client_id_len) {
sd_dhcp_client_set_client_id (priv->client4,
client_id[0],
client_id + 1,
client_id_len - 1);
_save_client_id (NM_DHCP_SYSTEMD (client),
client_id[0],
client_id + 1,
client_id_len - 1);
}
}
/* Add requested options */
for (i = 0; dhcp4_requests[i].name; i++) {
if (dhcp4_requests[i].include)
sd_dhcp_client_set_request_option (priv->client4, dhcp4_requests[i].num);
}
hostname = nm_dhcp_client_get_hostname (client);
if (hostname) {
char *prefix, *dot;
prefix = strdup (hostname);
dot = strchr (prefix, '.');
/* get rid of the domain */
if (dot)
*dot = '\0';
r = sd_dhcp_client_set_hostname (priv->client4, prefix);
free (prefix);
if (r < 0) {
_LOGW ("failed to set DHCP hostname (%d)", r);
goto error;
}
}
fqdn = nm_dhcp_client_get_fqdn (client);
if (fqdn) {
r = sd_dhcp_client_set_hostname (priv->client4, fqdn);
if (r < 0) {
_LOGW ("failed to set DHCP FQDN (%d)", r);
goto error;
}
}
r = sd_dhcp_client_start (priv->client4);
if (r < 0) {
_LOGW ("failed to start client (%d)", r);
goto error;
}
nm_dhcp_client_start_timeout (client);
success = TRUE;
error:
sd_dhcp_lease_unref (lease);
if (!success)
priv->client4 = sd_dhcp_client_unref (priv->client4);
return success;
}
int dhcp4_configure(Link *link) {
int r;
assert(link);
assert(link->network);
assert(link->network->dhcp & ADDRESS_FAMILY_IPV4);
r = sd_dhcp_client_new(&link->dhcp_client);
if (r < 0)
return r;
r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
if (r < 0)
return r;
r = sd_dhcp_client_set_mac(link->dhcp_client,
(const uint8_t *) &link->mac,
sizeof (link->mac), ARPHRD_ETHER);
if (r < 0)
return r;
r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);
if (r < 0)
return r;
r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link);
if (r < 0)
return r;
r = sd_dhcp_client_set_request_broadcast(link->dhcp_client,
link->network->dhcp_broadcast);
if (r < 0)
return r;
if (link->mtu) {
r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
if (r < 0)
return r;
}
if (link->network->dhcp_mtu) {
r = sd_dhcp_client_set_request_option(link->dhcp_client,
DHCP_OPTION_INTERFACE_MTU);
if (r < 0)
return r;
}
if (link->network->dhcp_routes) {
r = sd_dhcp_client_set_request_option(link->dhcp_client,
DHCP_OPTION_STATIC_ROUTE);
if (r < 0)
return r;
r = sd_dhcp_client_set_request_option(link->dhcp_client,
DHCP_OPTION_CLASSLESS_STATIC_ROUTE);
if (r < 0)
return r;
}
if (link->network->dhcp_sendhost) {
_cleanup_free_ char *hostname = NULL;
const char *hn = NULL;
if (!link->network->hostname) {
hostname = gethostname_malloc();
if (!hostname)
return -ENOMEM;
hn = hostname;
} else
hn = link->network->hostname;
if (!is_localhost(hn)) {
r = sd_dhcp_client_set_hostname(link->dhcp_client, hn);
if (r < 0)
return r;
}
}
if (link->network->dhcp_vendor_class_identifier) {
r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client,
link->network->dhcp_vendor_class_identifier);
if (r < 0)
return r;
}
switch (link->network->dhcp_client_identifier) {
case DHCP_CLIENT_ID_DUID:
/* Library defaults to this. */
break;
case DHCP_CLIENT_ID_MAC:
r = sd_dhcp_client_set_client_id(link->dhcp_client,
ARPHRD_ETHER,
(const uint8_t *) &link->mac,
sizeof (link->mac));
if (r < 0)
return r;
break;
default:
assert_not_reached("Unknown client identifier type.");
}
return 0;
}
int dhcp4_configure(Link *link) {
int r;
assert(link);
assert(link->network);
assert(link->network->dhcp & ADDRESS_FAMILY_IPV4);
if (!link->dhcp_client) {
r = sd_dhcp_client_new(&link->dhcp_client);
if (r < 0)
return r;
}
r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
if (r < 0)
return r;
r = sd_dhcp_client_set_mac(link->dhcp_client,
(const uint8_t *) &link->mac,
sizeof (link->mac), ARPHRD_ETHER);
if (r < 0)
return r;
r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);
if (r < 0)
return r;
r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link);
if (r < 0)
return r;
r = sd_dhcp_client_set_request_broadcast(link->dhcp_client,
link->network->dhcp_broadcast);
if (r < 0)
return r;
if (link->mtu) {
r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
if (r < 0)
return r;
}
if (link->network->dhcp_use_mtu) {
r = sd_dhcp_client_set_request_option(link->dhcp_client,
SD_DHCP_OPTION_INTERFACE_MTU);
if (r < 0)
return r;
}
if (link->network->dhcp_use_routes) {
r = sd_dhcp_client_set_request_option(link->dhcp_client,
SD_DHCP_OPTION_STATIC_ROUTE);
if (r < 0)
return r;
r = sd_dhcp_client_set_request_option(link->dhcp_client,
SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE);
if (r < 0)
return r;
}
/* Always acquire the timezone and NTP */
r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NTP_SERVER);
if (r < 0)
return r;
r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NEW_TZDB_TIMEZONE);
if (r < 0)
return r;
if (link->network->dhcp_send_hostname) {
_cleanup_free_ char *hostname = NULL;
const char *hn = NULL;
if (!link->network->dhcp_hostname) {
hostname = gethostname_malloc();
if (!hostname)
return -ENOMEM;
hn = hostname;
} else
hn = link->network->dhcp_hostname;
if (!is_localhost(hn)) {
r = sd_dhcp_client_set_hostname(link->dhcp_client, hn);
if (r < 0)
return r;
}
}
if (link->network->dhcp_vendor_class_identifier) {
r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client,
link->network->dhcp_vendor_class_identifier);
if (r < 0)
return r;
}
switch (link->network->dhcp_client_identifier) {
case DHCP_CLIENT_ID_DUID:
/* If configured, apply user specified DUID and/or IAID */
r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
link->network->iaid_value,
link->manager->dhcp_duid_len,
&link->manager->dhcp_duid);
if (r < 0)
return r;
break;
case DHCP_CLIENT_ID_MAC:
r = sd_dhcp_client_set_client_id(link->dhcp_client,
ARPHRD_ETHER,
(const uint8_t *) &link->mac,
sizeof (link->mac));
if (r < 0)
return r;
break;
default:
assert_not_reached("Unknown client identifier type.");
}
return 0;
}
int dhcp4_configure(Link *link) {
int r;
assert(link);
assert(link->network);
assert(IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4));
r = sd_dhcp_client_new(&link->dhcp_client);
if (r < 0)
return r;
r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
if (r < 0)
return r;
r = sd_dhcp_client_set_mac(link->dhcp_client,
(const uint8_t *) &link->mac,
sizeof (link->mac), ARPHRD_ETHER);
if (r < 0)
return r;
r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);
if (r < 0)
return r;
r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link);
if (r < 0)
return r;
r = sd_dhcp_client_set_request_broadcast(link->dhcp_client,
link->network->dhcp_broadcast);
if (r < 0)
return r;
if (link->mtu) {
r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
if (r < 0)
return r;
}
if (link->network->dhcp_mtu) {
r = sd_dhcp_client_set_request_option(link->dhcp_client,
DHCP_OPTION_INTERFACE_MTU);
if (r < 0)
return r;
}
if (link->network->dhcp_routes) {
r = sd_dhcp_client_set_request_option(link->dhcp_client,
DHCP_OPTION_STATIC_ROUTE);
if (r < 0)
return r;
r = sd_dhcp_client_set_request_option(link->dhcp_client,
DHCP_OPTION_CLASSLESS_STATIC_ROUTE);
if (r < 0)
return r;
}
if (link->network->dhcp_sendhost) {
_cleanup_free_ char *hostname = NULL;
hostname = gethostname_malloc();
if (!hostname)
return -ENOMEM;
if (!is_localhost(hostname)) {
r = sd_dhcp_client_set_hostname(link->dhcp_client,
hostname);
if (r < 0)
return r;
}
}
if (link->network->dhcp_vendor_class_identifier) {
r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client,
link->network->dhcp_vendor_class_identifier);
if (r < 0)
return r;
}
return 0;
}
static gboolean
ip4_start (NMDhcpClient *client, const char *dhcp_anycast_addr, const char *last_ip4_address)
{
NMDhcpSystemdPrivate *priv = NM_DHCP_SYSTEMD_GET_PRIVATE (client);
const char *iface = nm_dhcp_client_get_iface (client);
const GByteArray *hwaddr;
sd_dhcp_lease *lease = NULL;
GBytes *override_client_id;
const uint8_t *client_id = NULL;
size_t client_id_len = 0;
struct in_addr last_addr = { 0 };
const char *hostname;
int r, i;
gboolean success = FALSE;
g_assert (priv->client4 == NULL);
g_assert (priv->client6 == NULL);
g_free (priv->lease_file);
priv->lease_file = get_leasefile_path (iface, nm_dhcp_client_get_uuid (client), FALSE);
r = sd_dhcp_client_new (&priv->client4);
if (r < 0) {
nm_log_warn (LOGD_DHCP4, "(%s): failed to create DHCPv4 client (%d)", iface, r);
return FALSE;
}
r = sd_dhcp_client_attach_event (priv->client4, NULL, 0);
if (r < 0) {
nm_log_warn (LOGD_DHCP4, "(%s): failed to attach DHCP event (%d)", iface, r);
goto error;
}
hwaddr = nm_dhcp_client_get_hw_addr (client);
if (hwaddr) {
r = sd_dhcp_client_set_mac (priv->client4,
hwaddr->data,
hwaddr->len,
get_arp_type (hwaddr));
if (r < 0) {
nm_log_warn (LOGD_DHCP4, "(%s): failed to set DHCP MAC address (%d)", iface, r);
goto error;
}
}
r = sd_dhcp_client_set_index (priv->client4, nm_dhcp_client_get_ifindex (client));
if (r < 0) {
nm_log_warn (LOGD_DHCP4, "(%s): failed to set DHCP ifindex (%d)", iface, r);
goto error;
}
r = sd_dhcp_client_set_callback (priv->client4, dhcp_event_cb, client);
if (r < 0) {
nm_log_warn (LOGD_DHCP4, "(%s): failed to set DHCP callback (%d)", iface, r);
goto error;
}
r = sd_dhcp_client_set_request_broadcast (priv->client4, true);
if (r < 0) {
nm_log_warn (LOGD_DHCP4, "(%s): failed to set DHCP broadcast (%d)", iface, r);
goto error;
}
dhcp_lease_load (&lease, priv->lease_file);
if (last_ip4_address)
inet_pton (AF_INET, last_ip4_address, &last_addr);
else if (lease)
sd_dhcp_lease_get_address (lease, &last_addr);
if (last_addr.s_addr) {
r = sd_dhcp_client_set_request_address (priv->client4, &last_addr);
if (r < 0) {
nm_log_warn (LOGD_DHCP4, "(%s): failed to set last IPv4 address (%d)", iface, r);
goto error;
}
}
override_client_id = nm_dhcp_client_get_client_id (client);
if (override_client_id) {
client_id = g_bytes_get_data (override_client_id, &client_id_len);
g_assert (client_id && client_id_len);
sd_dhcp_client_set_client_id (priv->client4,
client_id[0],
client_id + 1,
client_id_len - 1);
} else if (lease) {
r = sd_dhcp_lease_get_client_id (lease, (const void **) &client_id, &client_id_len);
if (r == 0 && client_id_len) {
sd_dhcp_client_set_client_id (priv->client4,
client_id[0],
client_id + 1,
client_id_len - 1);
_save_client_id (NM_DHCP_SYSTEMD (client),
client_id[0],
client_id + 1,
client_id_len - 1);
}
}
/* Add requested options */
for (i = 0; dhcp4_requests[i].name; i++) {
if (dhcp4_requests[i].include)
sd_dhcp_client_set_request_option (priv->client4, dhcp4_requests[i].num);
}
hostname = nm_dhcp_client_get_hostname (client);
if (hostname) {
r = sd_dhcp_client_set_hostname (priv->client4, hostname);
if (r < 0) {
nm_log_warn (LOGD_DHCP4, "(%s): failed to set DHCP hostname (%d)", iface, r);
goto error;
}
}
r = sd_dhcp_client_start (priv->client4);
if (r < 0) {
nm_log_warn (LOGD_DHCP4, "(%s): failed to start DHCP (%d)", iface, r);
goto error;
}
success = TRUE;
error:
sd_dhcp_lease_unref (lease);
if (!success)
priv->client4 = sd_dhcp_client_unref (priv->client4);
return success;
}
