static void
child_quit (NMDnsPlugin *plugin, gint status)
{
NMDnsDnsmasq *self = NM_DNS_DNSMASQ (plugin);
NMDnsDnsmasqPrivate *priv = NM_DNS_DNSMASQ_GET_PRIVATE (self);
gboolean failed = TRUE;
int err;
if (WIFEXITED (status)) {
err = WEXITSTATUS (status);
if (err) {
_LOGW ("dnsmasq exited with error: %s",
nm_utils_dnsmasq_status_to_string (err, NULL, 0));
} else {
_LOGD ("dnsmasq exited normally");
failed = FALSE;
}
} else if (WIFSTOPPED (status))
_LOGW ("dnsmasq stopped unexpectedly with signal %d", WSTOPSIG (status));
else if (WIFSIGNALED (status))
_LOGW ("dnsmasq died with signal %d", WTERMSIG (status));
else
_LOGW ("dnsmasq died from an unknown cause");
priv->running = FALSE;
if (failed)
g_signal_emit_by_name (self, NM_DNS_PLUGIN_FAILED);
}
static void
child_quit (NMDnsPlugin *plugin, gint status)
{
NMDnsDnsmasq *self = NM_DNS_DNSMASQ (plugin);
gboolean failed = TRUE;
int err;
if (WIFEXITED (status)) {
err = WEXITSTATUS (status);
if (err) {
nm_log_warn (LOGD_DNS, "dnsmasq exited with error: %s (%d)",
dm_exit_code_to_msg (err),
err);
} else
failed = FALSE;
} else if (WIFSTOPPED (status)) {
nm_log_warn (LOGD_DNS, "dnsmasq stopped unexpectedly with signal %d", WSTOPSIG (status));
} else if (WIFSIGNALED (status)) {
nm_log_warn (LOGD_DNS, "dnsmasq died with signal %d", WTERMSIG (status));
} else {
nm_log_warn (LOGD_DNS, "dnsmasq died from an unknown cause");
}
unlink (CONFFILE);
if (failed)
g_signal_emit_by_name (self, NM_DNS_PLUGIN_FAILED);
}
static gboolean
update (NMDnsPlugin *plugin,
const NMDnsIPConfigData **configs,
const NMGlobalDnsConfig *global_config,
const char *hostname)
{
NMDnsDnsmasq *self = NM_DNS_DNSMASQ (plugin);
NMDnsDnsmasqPrivate *priv = NM_DNS_DNSMASQ_GET_PRIVATE (self);
GVariantBuilder servers;
start_dnsmasq (self);
g_variant_builder_init (&servers, G_VARIANT_TYPE ("aas"));
if (global_config)
add_global_config (self, &servers, global_config);
else {
while (*configs) {
add_ip_config_data (self, &servers, *configs);
configs++;
}
}
g_clear_pointer (&priv->set_server_ex_args, g_variant_unref);
priv->set_server_ex_args = g_variant_ref_sink (g_variant_new ("(aas)", &servers));
send_dnsmasq_update (self);
return TRUE;
}
static void
dnsmasq_update_done (GDBusProxy *proxy, GAsyncResult *res, gpointer user_data)
{
NMDnsDnsmasq *self;
NMDnsDnsmasqPrivate *priv;
gs_free_error GError *error = NULL;
gs_unref_variant GVariant *response = NULL;
response = g_dbus_proxy_call_finish (proxy, res, &error);
if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
return;
self = NM_DNS_DNSMASQ (user_data);
priv = NM_DNS_DNSMASQ_GET_PRIVATE (self);
if (!response)
_LOGW ("dnsmasq update failed: %s", error->message);
else {
g_dbus_proxy_call (priv->dnsmasq,
"ClearCache",
NULL,
G_DBUS_CALL_FLAGS_NONE,
-1,
priv->update_cancellable,
(GAsyncReadyCallback) dnsmasq_clear_cache_done,
self);
}
}
static void
dnsmasq_clear_cache_done (GDBusProxy *proxy, GAsyncResult *res, gpointer user_data)
{
NMDnsDnsmasq *self;
gs_free_error GError *error = NULL;
gs_unref_variant GVariant *response = NULL;
response = g_dbus_proxy_call_finish (proxy, res, &error);
if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
return;
self = NM_DNS_DNSMASQ (user_data);
if (!response)
_LOGW ("dnsmasq cache clear failed: %s", error->message);
else
_LOGD ("dnsmasq update successful, cache cleared");
}
static void
name_owner_changed (GObject *object,
GParamSpec *pspec,
gpointer user_data)
{
NMDnsDnsmasq *self = NM_DNS_DNSMASQ (user_data);
NMDnsDnsmasqPrivate *priv = NM_DNS_DNSMASQ_GET_PRIVATE (self);
gs_free char *owner = NULL;
owner = g_dbus_proxy_get_name_owner (G_DBUS_PROXY (object));
if (owner) {
_LOGI ("dnsmasq appeared as %s", owner);
priv->running = TRUE;
send_dnsmasq_update (self);
} else {
_LOGI ("dnsmasq disappeared");
priv->running = FALSE;
g_signal_emit_by_name (self, NM_DNS_PLUGIN_FAILED);
}
}
static void
dnsmasq_proxy_cb (GObject *source, GAsyncResult *res, gpointer user_data)
{
NMDnsDnsmasq *self;
NMDnsDnsmasqPrivate *priv;
gs_free_error GError *error = NULL;
gs_free char *owner = NULL;
GDBusProxy *proxy;
proxy = g_dbus_proxy_new_finish (res, &error);
if ( !proxy
&& g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
return;
self = NM_DNS_DNSMASQ (user_data);
if (!proxy) {
_LOGW ("failed to connect to dnsmasq via DBus: %s", error->message);
g_signal_emit_by_name (self, NM_DNS_PLUGIN_FAILED);
return;
}
priv = NM_DNS_DNSMASQ_GET_PRIVATE (self);
priv->dnsmasq = proxy;
nm_clear_g_cancellable (&priv->dnsmasq_cancellable);
_LOGD ("dnsmasq proxy creation successful");
g_signal_connect (priv->dnsmasq, "notify::g-name-owner",
G_CALLBACK (name_owner_changed), self);
owner = g_dbus_proxy_get_name_owner (priv->dnsmasq);
priv->running = (owner != NULL);
if (priv->running)
send_dnsmasq_update (self);
}
static gboolean
update (NMDnsPlugin *plugin,
const GSList *vpn_configs,
const GSList *dev_configs,
const GSList *other_configs,
const char *hostname,
const char *iface)
{
NMDnsDnsmasq *self = NM_DNS_DNSMASQ (plugin);
GString *conf;
GSList *iter;
const char *argv[11];
GError *error = NULL;
int ignored;
GPid pid = 0;
/* Kill the old dnsmasq; there doesn't appear to be a way to get dnsmasq
* to reread the config file using SIGHUP or similar. This is a small race
* here when restarting dnsmasq when DNS requests could go to the upstream
* servers instead of to dnsmasq.
*/
nm_dns_plugin_child_kill (plugin);
/* Build up the new dnsmasq config file */
conf = g_string_sized_new (150);
/* Use split DNS for VPN configs */
for (iter = (GSList *) vpn_configs; iter; iter = g_slist_next (iter)) {
if (NM_IS_IP4_CONFIG (iter->data))
add_ip4_config (conf, NM_IP4_CONFIG (iter->data), TRUE);
else if (NM_IS_IP6_CONFIG (iter->data))
add_ip6_config (conf, NM_IP6_CONFIG (iter->data), TRUE, iface);
}
/* Now add interface configs without split DNS */
for (iter = (GSList *) dev_configs; iter; iter = g_slist_next (iter)) {
if (NM_IS_IP4_CONFIG (iter->data))
add_ip4_config (conf, NM_IP4_CONFIG (iter->data), FALSE);
else if (NM_IS_IP6_CONFIG (iter->data))
add_ip6_config (conf, NM_IP6_CONFIG (iter->data), FALSE, iface);
}
/* And any other random configs */
for (iter = (GSList *) other_configs; iter; iter = g_slist_next (iter)) {
if (NM_IS_IP4_CONFIG (iter->data))
add_ip4_config (conf, NM_IP4_CONFIG (iter->data), FALSE);
else if (NM_IS_IP6_CONFIG (iter->data))
add_ip6_config (conf, NM_IP6_CONFIG (iter->data), FALSE, iface);
}
/* Write out the config file */
if (!g_file_set_contents (CONFFILE, conf->str, -1, &error)) {
nm_log_warn (LOGD_DNS, "Failed to write dnsmasq config file %s: (%d) %s",
CONFFILE,
error ? error->code : -1,
error && error->message ? error->message : "(unknown)");
g_clear_error (&error);
goto out;
}
ignored = chmod (CONFFILE, 0600);
nm_log_dbg (LOGD_DNS, "dnsmasq local caching DNS configuration:");
nm_log_dbg (LOGD_DNS, "%s", conf->str);
argv[0] = find_dnsmasq ();
argv[1] = "--no-resolv"; /* Use only commandline */
argv[2] = "--keep-in-foreground";
argv[3] = "--strict-order";
argv[4] = "--bind-interfaces";
argv[5] = "--pid-file=" PIDFILE;
argv[6] = "--listen-address=127.0.0.1"; /* Should work for both 4 and 6 */
argv[7] = "--conf-file=" CONFFILE;
argv[8] = "--cache-size=400";
argv[9] = NULL;
/* And finally spawn dnsmasq */
pid = nm_dns_plugin_child_spawn (NM_DNS_PLUGIN (self), argv, PIDFILE, "bin/dnsmasq");
out:
g_string_free (conf, TRUE);
return pid ? TRUE : FALSE;
}
static gboolean
update (NMDnsPlugin *plugin,
const GSList *vpn_configs,
const GSList *dev_configs,
const GSList *other_configs,
const NMGlobalDnsConfig *global_config,
const char *hostname)
{
NMDnsDnsmasq *self = NM_DNS_DNSMASQ (plugin);
const char *dm_binary;
GString *conf;
GSList *iter;
const char *argv[15];
GError *error = NULL;
int ignored;
GPid pid = 0;
guint idx = 0;
/* Kill the old dnsmasq; there doesn't appear to be a way to get dnsmasq
* to reread the config file using SIGHUP or similar. This is a small race
* here when restarting dnsmasq when DNS requests could go to the upstream
* servers instead of to dnsmasq.
*/
nm_dns_plugin_child_kill (plugin);
dm_binary = nm_utils_find_helper ("dnsmasq", DNSMASQ_PATH, NULL);
if (!dm_binary) {
nm_log_warn (LOGD_DNS, "Could not find dnsmasq binary");
return FALSE;
}
/* Build up the new dnsmasq config file */
conf = g_string_sized_new (150);
if (global_config)
add_global_config (conf, global_config);
else {
/* Use split DNS for VPN configs */
for (iter = (GSList *) vpn_configs; iter; iter = g_slist_next (iter)) {
if (NM_IS_IP4_CONFIG (iter->data))
add_ip4_config (conf, NM_IP4_CONFIG (iter->data), TRUE);
else if (NM_IS_IP6_CONFIG (iter->data))
add_ip6_config (conf, NM_IP6_CONFIG (iter->data), TRUE);
}
/* Now add interface configs without split DNS */
for (iter = (GSList *) dev_configs; iter; iter = g_slist_next (iter)) {
if (NM_IS_IP4_CONFIG (iter->data))
add_ip4_config (conf, NM_IP4_CONFIG (iter->data), FALSE);
else if (NM_IS_IP6_CONFIG (iter->data))
add_ip6_config (conf, NM_IP6_CONFIG (iter->data), FALSE);
}
/* And any other random configs */
for (iter = (GSList *) other_configs; iter; iter = g_slist_next (iter)) {
if (NM_IS_IP4_CONFIG (iter->data))
add_ip4_config (conf, NM_IP4_CONFIG (iter->data), FALSE);
else if (NM_IS_IP6_CONFIG (iter->data))
add_ip6_config (conf, NM_IP6_CONFIG (iter->data), FALSE);
}
}
/* Write out the config file */
if (!g_file_set_contents (CONFFILE, conf->str, -1, &error)) {
nm_log_warn (LOGD_DNS, "Failed to write dnsmasq config file %s: (%d) %s",
CONFFILE,
error ? error->code : -1,
error && error->message ? error->message : "(unknown)");
g_clear_error (&error);
goto out;
}
ignored = chmod (CONFFILE, 0644);
nm_log_dbg (LOGD_DNS, "dnsmasq local caching DNS configuration:");
nm_log_dbg (LOGD_DNS, "%s", conf->str);
argv[idx++] = dm_binary;
argv[idx++] = "--no-resolv"; /* Use only commandline */
argv[idx++] = "--keep-in-foreground";
argv[idx++] = "--no-hosts"; /* don't use /etc/hosts to resolve */
argv[idx++] = "--bind-interfaces";
argv[idx++] = "--pid-file=" PIDFILE;
argv[idx++] = "--listen-address=127.0.0.1"; /* Should work for both 4 and 6 */
argv[idx++] = "--conf-file=" CONFFILE;
argv[idx++] = "--cache-size=400";
argv[idx++] = "--proxy-dnssec"; /* Allow DNSSEC to pass through */
/* dnsmasq exits if the conf dir is not present */
if (g_file_test (CONFDIR, G_FILE_TEST_IS_DIR))
argv[idx++] = "--conf-dir=" CONFDIR;
argv[idx++] = NULL;
g_warn_if_fail (idx <= G_N_ELEMENTS (argv));
/* And finally spawn dnsmasq */
pid = nm_dns_plugin_child_spawn (NM_DNS_PLUGIN (self), argv, PIDFILE, "bin/dnsmasq");
out:
g_string_free (conf, TRUE);
return pid ? TRUE : FALSE;
}
