working dns map write

netfoundry · Dec 5, 2023 · 440ab3f · 440ab3f
1 parent f769850
commit 440ab3f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/zfw_xdp_dns_filter.c b/src/zfw_xdp_dns_filter.c
@@ -142,7 +142,7 @@ int xdp_filter(struct xdp_md *ctx) {
                 }
             }
             long ret = set_dns(i, dns_payload);
-            if (ret < 0){
+            if (ret > 0){
                bpf_printk("wrote %d characters", ret);
             }
             dns_payload = (dns_payload + dns_name_len + 4);