static gboolean
add_ip_config_data (NMDnsDnsmasq *self, GVariantBuilder *servers, const NMDnsIPConfigData *data)
{
if (NM_IS_IP4_CONFIG (data->config)) {
return add_ip4_config (self,
servers,
(NMIP4Config *) data->config,
data->iface,
data->type == NM_DNS_IP_CONFIG_TYPE_VPN);
} else if (NM_IS_IP6_CONFIG (data->config)) {
return add_ip6_config (self,
servers,
(NMIP6Config *) data->config,
data->iface,
data->type == NM_DNS_IP_CONFIG_TYPE_VPN);
} else
g_return_val_if_reached (FALSE);
}
char *
nm_dhcp_dhclient_create_config (const char *interface,
gboolean is_ip6,
const char *dhcp_client_id,
const char *anycast_addr,
const char *hostname,
const char *orig_path,
const char *orig_contents)
{
GString *new_contents;
GPtrArray *alsoreq;
int i;
g_return_val_if_fail (!anycast_addr || nm_utils_hwaddr_valid (anycast_addr, ETH_ALEN), NULL);
new_contents = g_string_new (_("# Created by NetworkManager\n"));
alsoreq = g_ptr_array_sized_new (5);
if (orig_contents) {
char **lines, **line;
gboolean in_alsoreq = FALSE;
g_string_append_printf (new_contents, _("# Merged from %s\n\n"), orig_path);
lines = g_strsplit_set (orig_contents, "\n\r", 0);
for (line = lines; lines && *line; line++) {
char *p = *line;
if (!strlen (g_strstrip (p)))
continue;
/* Override config file "dhcp-client-id" and use one from the
* connection.
*/
if (dhcp_client_id && !strncmp (p, CLIENTID_TAG, strlen (CLIENTID_TAG)))
continue;
/* Override config file hostname and use one from the connection */
if (hostname) {
if (strncmp (p, HOSTNAME4_TAG, strlen (HOSTNAME4_TAG)) == 0)
continue;
if (strncmp (p, HOSTNAME6_TAG, strlen (HOSTNAME6_TAG)) == 0)
continue;
}
/* Ignore 'script' since we pass our own */
if (g_str_has_prefix (p, "script "))
continue;
/* Check for "also require" */
if (!strncmp (p, ALSOREQ_TAG, strlen (ALSOREQ_TAG))) {
in_alsoreq = TRUE;
p += strlen (ALSOREQ_TAG);
}
if (in_alsoreq) {
char **areq, **aiter;
/* Grab each 'also require' option and save for later */
areq = g_strsplit_set (p, "\t ,", -1);
for (aiter = areq; aiter && *aiter; aiter++) {
if (!strlen (g_strstrip (*aiter)))
continue;
if (*aiter[0] == ';') {
/* all done */
in_alsoreq = FALSE;
break;
}
if (!g_ascii_isalnum ((*aiter)[0]))
continue;
if ((*aiter)[strlen (*aiter) - 1] == ';') {
/* Remove the EOL marker */
(*aiter)[strlen (*aiter) - 1] = '\0';
in_alsoreq = FALSE;
}
add_also_request (alsoreq, *aiter);
}
if (areq)
g_strfreev (areq);
continue;
}
/* Existing configuration line is OK, add it to new configuration */
g_string_append (new_contents, *line);
g_string_append_c (new_contents, '\n');
}
if (lines)
g_strfreev (lines);
} else
g_string_append_c (new_contents, '\n');
if (is_ip6) {
add_ip6_config (new_contents, hostname);
add_also_request (alsoreq, "dhcp6.name-servers");
add_also_request (alsoreq, "dhcp6.domain-search");
add_also_request (alsoreq, "dhcp6.client-id");
} else {
add_ip4_config (new_contents, dhcp_client_id, hostname);
add_also_request (alsoreq, "rfc3442-classless-static-routes");
add_also_request (alsoreq, "ms-classless-static-routes");
add_also_request (alsoreq, "static-routes");
add_also_request (alsoreq, "wpad");
add_also_request (alsoreq, "ntp-servers");
}
/* And add it to the dhclient configuration */
for (i = 0; i < alsoreq->len; i++) {
char *t = g_ptr_array_index (alsoreq, i);
g_string_append_printf (new_contents, "also request %s;\n", t);
g_free (t);
}
g_ptr_array_free (alsoreq, TRUE);
g_string_append_c (new_contents, '\n');
if (anycast_addr) {
g_string_append_printf (new_contents, "interface \"%s\" {\n"
" initial-interval 1; \n"
" anycast-mac ethernet %s;\n"
"}\n",
interface, anycast_addr);
}
return g_string_free (new_contents, FALSE);
}
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;
}
