NMIP6Config *
nm_ip6_manager_get_ip6_config (NMIP6Manager *manager, int ifindex)
{
NMIP6ManagerPrivate *priv;
NMIP6Device *device;
NMIP6Config *config;
struct rtnl_addr *rtnladdr;
struct nl_addr *nladdr;
struct in6_addr *addr;
NMIP6Address *ip6addr;
struct rtnl_route *rtnlroute;
struct nl_addr *nldest, *nlgateway;
struct in6_addr *dest, *gateway;
gboolean defgw_set = FALSE;
struct in6_addr defgw;
uint32_t metric;
NMIP6Route *ip6route;
int i;
g_return_val_if_fail (NM_IS_IP6_MANAGER (manager), NULL);
g_return_val_if_fail (ifindex > 0, NULL);
priv = NM_IP6_MANAGER_GET_PRIVATE (manager);
device = (NMIP6Device *) g_hash_table_lookup (priv->devices,
GINT_TO_POINTER (ifindex));
if (!device) {
nm_log_warn (LOGD_IP6, "(%d): addrconf not started.", ifindex);
return NULL;
}
config = nm_ip6_config_new ();
if (!config) {
nm_log_err (LOGD_IP6, "(%s): out of memory creating IP6 config object.",
device->iface);
return NULL;
}
/* Make sure we refill the route and address caches, otherwise we won't get
* up-to-date information here since the netlink route/addr change messages
* may be lagging a bit.
*/
nl_cache_refill (priv->nlh, priv->route_cache);
nl_cache_refill (priv->nlh, priv->addr_cache);
/* Add routes */
for (rtnlroute = FIRST_ROUTE (priv->route_cache); rtnlroute; rtnlroute = NEXT_ROUTE (rtnlroute)) {
/* Make sure it's an IPv6 route for this device */
if (rtnl_route_get_oif (rtnlroute) != device->ifindex)
continue;
if (rtnl_route_get_family (rtnlroute) != AF_INET6)
continue;
nldest = rtnl_route_get_dst (rtnlroute);
if (!nldest || nl_addr_get_family (nldest) != AF_INET6)
continue;
dest = nl_addr_get_binary_addr (nldest);
nlgateway = rtnl_route_get_gateway (rtnlroute);
if (!nlgateway || nl_addr_get_family (nlgateway) != AF_INET6)
continue;
gateway = nl_addr_get_binary_addr (nlgateway);
if (rtnl_route_get_dst_len (rtnlroute) == 0) {
/* Default gateway route; don't add to normal routes but to each address */
if (!defgw_set) {
memcpy (&defgw, gateway, sizeof (defgw));
defgw_set = TRUE;
}
continue;
}
/* Also ignore link-local routes where the destination and gateway are
* the same, which apparently get added by the kernel but return -EINVAL
* when we try to add them via netlink.
*/
if (gateway && IN6_ARE_ADDR_EQUAL (dest, gateway))
continue;
ip6route = nm_ip6_route_new ();
nm_ip6_route_set_dest (ip6route, dest);
nm_ip6_route_set_prefix (ip6route, rtnl_route_get_dst_len (rtnlroute));
nm_ip6_route_set_next_hop (ip6route, gateway);
rtnl_route_get_metric(rtnlroute, 1, &metric);
if (metric != UINT_MAX)
nm_ip6_route_set_metric (ip6route, metric);
nm_ip6_config_take_route (config, ip6route);
}
/* Add addresses */
for (rtnladdr = FIRST_ADDR (priv->addr_cache); rtnladdr; rtnladdr = NEXT_ADDR (rtnladdr)) {
if (rtnl_addr_get_ifindex (rtnladdr) != device->ifindex)
continue;
nladdr = rtnl_addr_get_local (rtnladdr);
if (!nladdr || nl_addr_get_family (nladdr) != AF_INET6)
continue;
addr = nl_addr_get_binary_addr (nladdr);
ip6addr = nm_ip6_address_new ();
nm_ip6_address_set_prefix (ip6addr, rtnl_addr_get_prefixlen (rtnladdr));
nm_ip6_address_set_address (ip6addr, addr);
nm_ip6_config_take_address (config, ip6addr);
if (defgw_set)
nm_ip6_address_set_gateway (ip6addr, &defgw);
}
/* Add DNS servers */
if (device->rdnss_servers) {
NMIP6RDNSS *rdnss = (NMIP6RDNSS *)(device->rdnss_servers->data);
for (i = 0; i < device->rdnss_servers->len; i++)
nm_ip6_config_add_nameserver (config, &rdnss[i].addr);
}
/* Add DNS domains */
if (device->dnssl_domains) {
NMIP6DNSSL *dnssl = (NMIP6DNSSL *)(device->dnssl_domains->data);
for (i = 0; i < device->dnssl_domains->len; i++)
nm_ip6_config_add_domain (config, dnssl[i].domain);
}
return config;
}
static NMIP6Config *
lease_to_ip6_config (const char *iface,
int ifindex,
sd_dhcp6_lease *lease,
GHashTable *options,
gboolean log_lease,
gboolean info_only,
GError **error)
{
struct in6_addr tmp_addr, *dns;
uint32_t lft_pref, lft_valid;
NMIP6Config *ip6_config;
const char *addr_str;
char **domains;
GString *str;
int num, i;
gint32 ts;
g_return_val_if_fail (lease, NULL);
ip6_config = nm_ip6_config_new (ifindex);
ts = nm_utils_get_monotonic_timestamp_s ();
str = g_string_sized_new (30);
/* Addresses */
sd_dhcp6_lease_reset_address_iter (lease);
while (sd_dhcp6_lease_get_address (lease, &tmp_addr, &lft_pref, &lft_valid) >= 0) {
NMPlatformIP6Address address = {
.plen = 128,
.address = tmp_addr,
.timestamp = ts,
.lifetime = lft_valid,
.preferred = lft_pref,
.addr_source = NM_IP_CONFIG_SOURCE_DHCP,
};
nm_ip6_config_add_address (ip6_config, &address);
addr_str = nm_utils_inet6_ntop (&tmp_addr, NULL);
g_string_append_printf (str, "%s%s", str->len ? " " : "", addr_str);
LOG_LEASE (LOGD_DHCP6,
" address %s",
nm_platform_ip6_address_to_string (&address, NULL, 0));
};
if (str->len) {
add_option (options, dhcp6_requests, DHCP6_OPTION_IP_ADDRESS, str->str);
g_string_set_size (str , 0);
}
if (!info_only && nm_ip6_config_get_num_addresses (ip6_config) == 0) {
g_string_free (str, TRUE);
g_object_unref (ip6_config);
g_set_error_literal (error,
NM_MANAGER_ERROR,
NM_MANAGER_ERROR_FAILED,
"no address received in managed mode");
return NULL;
}
/* DNS servers */
num = sd_dhcp6_lease_get_dns (lease, &dns);
if (num > 0) {
for (i = 0; i < num; i++) {
nm_ip6_config_add_nameserver (ip6_config, &dns[i]);
addr_str = nm_utils_inet6_ntop (&dns[i], NULL);
g_string_append_printf (str, "%s%s", str->len ? " " : "", addr_str);
LOG_LEASE (LOGD_DHCP6, " nameserver %s", addr_str);
}
add_option (options, dhcp6_requests, SD_DHCP6_OPTION_DNS_SERVERS, str->str);
g_string_set_size (str, 0);
}
/* Search domains */
num = sd_dhcp6_lease_get_domains (lease, &domains);
if (num > 0) {
for (i = 0; i < num; i++) {
nm_ip6_config_add_search (ip6_config, domains[i]);
g_string_append_printf (str, "%s%s", str->len ? " " : "", domains[i]);
LOG_LEASE (LOGD_DHCP6, " domain name '%s'", domains[i]);
}
add_option (options, dhcp6_requests, SD_DHCP6_OPTION_DOMAIN_LIST, str->str);
g_string_set_size (str, 0);
}
g_string_free (str, TRUE);
return ip6_config;
}
static void
bound6_handle (NMDhcpSystemd *self)
{
NMDhcpSystemdPrivate *priv = NM_DHCP_SYSTEMD_GET_PRIVATE (self);
const char *iface = nm_dhcp_client_get_iface (NM_DHCP_CLIENT (self));
gs_unref_object NMIP6Config *ip6_config = NULL;
gs_unref_hashtable GHashTable *options = NULL;
gs_free_error GError *error = NULL;
sd_dhcp6_lease *lease;
int r;
r = sd_dhcp6_client_get_lease (priv->client6, &lease);
if (r < 0 || !lease) {
_LOGW (" no lease!");
nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), NM_DHCP_STATE_FAIL, NULL, NULL);
return;
}
_LOGD ("lease available");
options = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, g_free);
ip6_config = lease_to_ip6_config (iface,
nm_dhcp_client_get_ifindex (NM_DHCP_CLIENT (self)),
lease,
options,
TRUE,
priv->info_only,
&error);
if (ip6_config) {
nm_dhcp_client_set_state (NM_DHCP_CLIENT (self),
NM_DHCP_STATE_BOUND,
G_OBJECT (ip6_config),
options);
} else {
_LOGW ("%s", error->message);
nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), NM_DHCP_STATE_FAIL, NULL, NULL);
}
}
NMIP6Config *
nm_dhcp_utils_ip6_config_from_options (int ifindex,
const char *iface,
GHashTable *options,
guint32 priority,
gboolean info_only)
{
NMIP6Config *ip6_config = NULL;
struct in6_addr tmp_addr;
NMPlatformIP6Address address;
char *str = NULL;
GHashTableIter iter;
gpointer key, value;
g_return_val_if_fail (options != NULL, NULL);
memset (&address, 0, sizeof (address));
address.plen = 128;
address.timestamp = nm_utils_get_monotonic_timestamp_s ();
g_hash_table_iter_init (&iter, options);
while (g_hash_table_iter_next (&iter, &key, &value)) {
nm_log_dbg (LOGD_DHCP6, "(%s): option '%s'=>'%s'",
iface, (const char *) key, (const char *) value);
}
ip6_config = nm_ip6_config_new (ifindex);
str = g_hash_table_lookup (options, "max_life");
if (str) {
address.lifetime = strtoul (str, NULL, 10);
nm_log_info (LOGD_DHCP6, " valid_lft %u", address.lifetime);
}
str = g_hash_table_lookup (options, "preferred_life");
if (str) {
address.preferred = strtoul (str, NULL, 10);
nm_log_info (LOGD_DHCP6, " preferred_lft %u", address.preferred);
}
str = g_hash_table_lookup (options, "ip6_address");
if (str) {
if (!inet_pton (AF_INET6, str, &tmp_addr)) {
nm_log_warn (LOGD_DHCP6, "(%s): DHCP returned invalid address '%s'",
iface, str);
goto error;
}
address.address = tmp_addr;
address.source = NM_IP_CONFIG_SOURCE_DHCP;
nm_ip6_config_add_address (ip6_config, &address);
nm_log_info (LOGD_DHCP6, " address %s", str);
} else if (info_only == FALSE) {
/* No address in Managed mode is a hard error */
goto error;
}
str = g_hash_table_lookup (options, "host_name");
if (str)
nm_log_info (LOGD_DHCP6, " hostname '%s'", str);
str = g_hash_table_lookup (options, "dhcp6_name_servers");
if (str) {
char **dns = g_strsplit (str, " ", 0);
char **s;
for (s = dns; *s; s++) {
if (inet_pton (AF_INET6, *s, &tmp_addr) > 0) {
if (!IN6_IS_ADDR_UNSPECIFIED (&tmp_addr)) {
nm_ip6_config_add_nameserver (ip6_config, &tmp_addr);
nm_log_info (LOGD_DHCP6, " nameserver '%s'", *s);
}
} else
nm_log_warn (LOGD_DHCP6, "ignoring invalid nameserver '%s'", *s);
}
g_strfreev (dns);
}
str = g_hash_table_lookup (options, "dhcp6_domain_search");
if (str)
process_domain_search (str, ip6_add_domain_search, ip6_config);
return ip6_config;
error:
g_object_unref (ip6_config);
return NULL;
}
/* This is exactly identical to nm_utils_merge_ip4_config, with s/4/6/,
* except that we can't compare addresses with ==.
*/
void
nm_utils_merge_ip6_config (NMIP6Config *ip6_config, NMSettingIP6Config *setting)
{
int i, j;
if (!setting)
return; /* Defaults are just fine */
if (nm_setting_ip6_config_get_ignore_auto_dns (setting)) {
nm_ip6_config_reset_nameservers (ip6_config);
nm_ip6_config_reset_domains (ip6_config);
nm_ip6_config_reset_searches (ip6_config);
}
if (nm_setting_ip6_config_get_ignore_auto_routes (setting))
nm_ip6_config_reset_routes (ip6_config);
for (i = 0; i < nm_setting_ip6_config_get_num_dns (setting); i++) {
const struct in6_addr *ns;
gboolean found = FALSE;
/* Avoid dupes */
ns = nm_setting_ip6_config_get_dns (setting, i);
for (j = 0; j < nm_ip6_config_get_num_nameservers (ip6_config); j++) {
if (ip6_addresses_equal (nm_ip6_config_get_nameserver (ip6_config, j), ns)) {
found = TRUE;
break;
}
}
if (!found)
nm_ip6_config_add_nameserver (ip6_config, ns);
}
/* DNS search domains */
for (i = 0; i < nm_setting_ip6_config_get_num_dns_searches (setting); i++) {
const char *search = nm_setting_ip6_config_get_dns_search (setting, i);
gboolean found = FALSE;
/* Avoid dupes */
for (j = 0; j < nm_ip6_config_get_num_searches (ip6_config); j++) {
if (!strcmp (search, nm_ip6_config_get_search (ip6_config, j))) {
found = TRUE;
break;
}
}
if (!found)
nm_ip6_config_add_search (ip6_config, search);
}
/* IPv6 addresses */
for (i = 0; i < nm_setting_ip6_config_get_num_addresses (setting); i++) {
NMIP6Address *setting_addr = nm_setting_ip6_config_get_address (setting, i);
guint32 num;
num = nm_ip6_config_get_num_addresses (ip6_config);
for (j = 0; j < num; j++) {
NMIP6Address *cfg_addr = nm_ip6_config_get_address (ip6_config, j);
/* Dupe, override with user-specified address */
if (ip6_addresses_equal (nm_ip6_address_get_address (cfg_addr), nm_ip6_address_get_address (setting_addr))) {
nm_ip6_config_replace_address (ip6_config, j, setting_addr);
break;
}
}
if (j == num)
nm_ip6_config_add_address (ip6_config, setting_addr);
}
/* IPv6 routes */
for (i = 0; i < nm_setting_ip6_config_get_num_routes (setting); i++) {
NMIP6Route *setting_route = nm_setting_ip6_config_get_route (setting, i);
guint32 num;
num = nm_ip6_config_get_num_routes (ip6_config);
for (j = 0; j < num; j++) {
NMIP6Route *cfg_route = nm_ip6_config_get_route (ip6_config, j);
/* Dupe, override with user-specified route */
if ( ip6_addresses_equal (nm_ip6_route_get_dest (cfg_route), nm_ip6_route_get_dest (setting_route))
&& (nm_ip6_route_get_prefix (cfg_route) == nm_ip6_route_get_prefix (setting_route))
&& ip6_addresses_equal (nm_ip6_route_get_next_hop (cfg_route), nm_ip6_route_get_next_hop (setting_route))) {
nm_ip6_config_replace_route (ip6_config, j, setting_route);
break;
}
}
if (j == num)
nm_ip6_config_add_route (ip6_config, setting_route);
}
if (nm_setting_ip6_config_get_never_default (setting))
nm_ip6_config_set_never_default (ip6_config, TRUE);
}
/* Given a table of DHCP options from the client, convert into an IP6Config */
static NMIP6Config *
ip6_options_to_config (NMDHCPClient *self)
{
NMDHCPClientPrivate *priv;
NMIP6Config *ip6_config = NULL;
struct in6_addr tmp_addr;
NMIP6Address *addr = NULL;
char *str = NULL;
GHashTableIter iter;
gpointer key, value;
g_return_val_if_fail (self != NULL, NULL);
g_return_val_if_fail (NM_IS_DHCP_CLIENT (self), NULL);
priv = NM_DHCP_CLIENT_GET_PRIVATE (self);
g_return_val_if_fail (priv->options != NULL, NULL);
g_hash_table_iter_init (&iter, priv->options);
while (g_hash_table_iter_next (&iter, &key, &value)) {
nm_log_dbg (LOGD_DHCP6, "(%s): option '%s'=>'%s'",
priv->iface, (const char *) key, (const char *) value);
}
ip6_config = nm_ip6_config_new ();
if (!ip6_config) {
nm_log_warn (LOGD_DHCP6, "(%s): couldn't allocate memory for an IP6Config!", priv->iface);
return NULL;
}
str = g_hash_table_lookup (priv->options, "new_ip6_address");
if (str) {
if (!inet_pton (AF_INET6, str, &tmp_addr)) {
nm_log_warn (LOGD_DHCP6, "(%s): DHCP returned invalid address '%s'",
priv->iface, str);
goto error;
}
addr = nm_ip6_address_new ();
g_assert (addr);
nm_ip6_address_set_address (addr, &tmp_addr);
/* DHCPv6 IA_NA assignments are single address only */
nm_ip6_address_set_prefix (addr, 128);
nm_log_info (LOGD_DHCP6, " address %s/128", str);
nm_ip6_config_take_address (ip6_config, addr);
} else if (priv->info_only == FALSE) {
/* No address in Managed mode is a hard error */
goto error;
}
str = g_hash_table_lookup (priv->options, "new_host_name");
if (str)
nm_log_info (LOGD_DHCP6, " hostname '%s'", str);
str = g_hash_table_lookup (priv->options, "new_dhcp6_name_servers");
if (str) {
char **searches = g_strsplit (str, " ", 0);
char **s;
for (s = searches; *s; s++) {
if (inet_pton (AF_INET6, *s, &tmp_addr) > 0) {
nm_ip6_config_add_nameserver (ip6_config, &tmp_addr);
nm_log_info (LOGD_DHCP6, " nameserver '%s'", *s);
} else
nm_log_warn (LOGD_DHCP6, "ignoring invalid nameserver '%s'", *s);
}
g_strfreev (searches);
}
str = g_hash_table_lookup (priv->options, "new_dhcp6_domain_search");
if (str)
process_domain_search (str, ip6_add_domain_search, ip6_config);
return ip6_config;
error:
g_object_unref (ip6_config);
return NULL;
}
/* Given a table of DHCP options from the client, convert into an IP6Config */
static NMIP6Config *
ip6_options_to_config (NMDHCPClient *self)
{
NMDHCPClientPrivate *priv;
NMIP6Config *ip6_config = NULL;
struct in6_addr tmp_addr;
NMIP6Address *addr = NULL;
char *str = NULL;
GHashTableIter iter;
gpointer key, value;
g_return_val_if_fail (self != NULL, NULL);
g_return_val_if_fail (NM_IS_DHCP_CLIENT (self), NULL);
priv = NM_DHCP_CLIENT_GET_PRIVATE (self);
g_return_val_if_fail (priv->options != NULL, NULL);
g_hash_table_iter_init (&iter, priv->options);
while (g_hash_table_iter_next (&iter, &key, &value)) {
nm_log_dbg (LOGD_DHCP6, "(%s): option '%s'=>'%s'",
priv->iface, (const char *) key, (const char *) value);
}
ip6_config = nm_ip6_config_new ();
if (!ip6_config) {
nm_log_warn (LOGD_DHCP6, "(%s): couldn't allocate memory for an IP6Config!", priv->iface);
return NULL;
}
addr = nm_ip6_address_new ();
if (!addr) {
nm_log_warn (LOGD_DHCP6, "(%s): couldn't allocate memory for an IP6 Address!", priv->iface);
goto error;
}
str = g_hash_table_lookup (priv->options, "new_ip6_address");
if (str) {
if (!inet_pton (AF_INET6, str, &tmp_addr)) {
nm_log_warn (LOGD_DHCP6, "(%s): DHCP returned invalid address '%s'",
priv->iface);
goto error;
}
nm_ip6_address_set_address (addr, &tmp_addr);
nm_log_info (LOGD_DHCP6, " address %s", str);
} else {
/* No address in managed mode is a hard error */
if (priv->info_only == FALSE)
goto error;
/* But "info-only" setups don't necessarily need an address */
nm_ip6_address_unref (addr);
addr = NULL;
}
/* Only care about prefix if we got an address */
if (addr) {
str = g_hash_table_lookup (priv->options, "new_ip6_prefixlen");
if (str) {
long unsigned int prefix;
errno = 0;
prefix = strtoul (str, NULL, 10);
if (errno != 0 || prefix > 128)
goto error;
nm_ip6_address_set_prefix (addr, (guint32) prefix);
nm_log_info (LOGD_DHCP6, " prefix %lu", prefix);
}
nm_ip6_config_take_address (ip6_config, addr);
addr = NULL;
}
str = g_hash_table_lookup (priv->options, "new_host_name");
if (str)
nm_log_info (LOGD_DHCP6, " hostname '%s'", str);
str = g_hash_table_lookup (priv->options, "new_dhcp6_name_servers");
if (str) {
char **searches = g_strsplit (str, " ", 0);
char **s;
for (s = searches; *s; s++) {
if (inet_pton (AF_INET6, *s, &tmp_addr) > 0) {
nm_ip6_config_add_nameserver (ip6_config, &tmp_addr);
nm_log_info (LOGD_DHCP6, " nameserver '%s'", *s);
} else
nm_log_warn (LOGD_DHCP6, "ignoring invalid nameserver '%s'", *s);
}
g_strfreev (searches);
}
str = g_hash_table_lookup (priv->options, "new_dhcp6_domain_search");
if (str)
process_domain_search (str, ip6_add_domain_search, ip6_config);
return ip6_config;
error:
if (addr)
nm_ip6_address_unref (addr);
g_object_unref (ip6_config);
return NULL;
}
