dnsproxy: Do not copy two extra bytes if using TCP

diff --git a/src/dnsproxy.c b/src/dnsproxy.c
index 24aad91..21512c6 100644 (file)
--- a/src/dnsproxy.c
+++ b/src/dnsproxy.c
@@ -387,7 +387,7 @@ static int ns_resolv(struct server_data *server, struct request_data *req,
 
                memcpy(alt + offset + altlen,
                        request + offset + altlen - domlen,
-                               req->request_len - altlen + domlen);
+                               req->request_len - altlen - offset + domlen);
 
                if (server->protocol == IPPROTO_TCP) {
                        int req_len = req->request_len + domlen - 2;