1 files changed, 9 insertions, 7 deletions

diff --git a/src/firejail/main.c b/src/firejail/main.c
index b2b4fe525..9cd89d42c 100644
--- a/src/firejail/main.c
+++ b/src/firejail/main.c
@@ -2034,18 +2034,20 @@ int main(int argc, char **argv) {
                                         fprintf(stderr, "Error: no network device configured\n");
                                         exit(1);
                                 }
-                                if (br->arg_ip_none || br->ip6sandbox) {
+                                if (br->ip6sandbox) {
                                         fprintf(stderr, "Error: cannot configure the IP address twice for the same interface\n");
                                         exit(1);
                                 }
 
                                 // configure this IP address for the last bridge defined
-                                // todo: verify ipv6 syntax
-                                br->ip6sandbox = argv[i] + 6;
-//                              if (atoip(argv[i] + 5, &br->ipsandbox)) {
-//                                      fprintf(stderr, "Error: invalid IP address\n");
-//                                      exit(1);
-//                              }
+                                if (check_ip46_address(argv[i] + 6) == 0) {
+                                        fprintf(stderr, "Error: invalid IPv6 address\n");
+                                        exit(1);
+                                }
+
+                                br->ip6sandbox = strdup(argv[i] + 6);
+                                if (br->ip6sandbox == NULL)
+                                        errExit("strdup");
                         }
                         else
                                 exit_err_feature("networking");