added support for IPv6 DNS configuration - #1722

1 files changed, 15 insertions, 0 deletions

diff --git a/src/firejail/network.c b/src/firejail/network.c
index 80f150ea0..5ebaf873c 100644
--- a/src/firejail/network.c
+++ b/src/firejail/network.c
@@ -28,6 +28,21 @@
 #include <net/route.h>
 #include <linux/if_bridge.h>
 
+// return 1 if addr is a IPv4 or IPv6 address
+int check_ip46_address(const char *addr) {
+        // check ipv4 address
+        uint32_t tmp;
+        if (atoip(addr, &tmp) == 0)
+                return 1;
+
+        // check ipv6 address
+        struct in6_addr result;
+        if (inet_pton(AF_INET6, addr, &result) == 1)
+                return 1;
+
+        // failed
+        return 0;
+}
 
 int net_get_mtu(const char *ifname) {
         int mtu = 0;