loopback: Check hostname/domainname validity

diff --git a/plugins/loopback.c b/plugins/loopback.c
index 1800c49..a111eee 100644 (file)
--- a/plugins/loopback.c
+++ b/plugins/loopback.c
@@ -39,6 +39,7 @@
 #include <connman/plugin.h>
 #include <connman/utsname.h>
 #include <connman/log.h>
+#include <connman/inet.h>
 
 static in_addr_t loopback_address;
 static in_addr_t loopback_netmask;
@@ -206,12 +207,21 @@ static const char *loopback_get_hostname(void)
 
 static int loopback_set_hostname(const char *hostname)
 {
-       int err;
+       const char *ptr;
+       int err, len;
 
        if (g_strcmp0(hostname, "<hostname>") == 0)
                return 0;
 
-       if (sethostname(hostname, strlen(hostname)) < 0) {
+       len = strlen(hostname);
+
+       if (connman_inet_check_hostname(hostname, len) == FALSE)
+               return -EINVAL;
+
+       if ((ptr = strstr(hostname, ".")) != NULL)
+               len = ptr - hostname;
+
+       if (sethostname(hostname, len) < 0) {
                err = -errno;
                connman_error("Failed to set hostname to %s", hostname);
                return err;
@@ -224,9 +234,14 @@ static int loopback_set_hostname(const char *hostname)
 
 static int loopback_set_domainname(const char *domainname)
 {
-       int err;
+       int err, len;
+
+       len = strlen(domainname);
+
+       if (connman_inet_check_hostname(domainname, len) == FALSE)
+               return -EINVAL;
 
-       if (setdomainname(domainname, strlen(domainname)) < 0) {
+       if (setdomainname(domainname, len) < 0) {
                err = -errno;
                connman_error("Failed to set domainname to %s", domainname);
                return err;