only account for ingress packets addressed to us

Test: builds && boots
Change-Id: I06c537dc1488e7f36e474760ab49dc299347003d
diff --git a/bpf_progs/netd.c b/bpf_progs/netd.c
index 8d05757..fe9a871 100644
--- a/bpf_progs/netd.c
+++ b/bpf_progs/netd.c
@@ -340,9 +340,11 @@
 
 DEFINE_BPF_PROG("schedact/ingress/account", AID_ROOT, AID_NET_ADMIN, tc_bpf_ingress_account_prog)
 (struct __sk_buff* skb) {
-    // Account for ingress traffic before tc drops it.
-    uint32_t key = skb->ifindex;
-    update_iface_stats_map(skb, BPF_INGRESS, &key);
+    if (is_received_skb(skb)) {
+        // Account for ingress traffic before tc drops it.
+        uint32_t key = skb->ifindex;
+        update_iface_stats_map(skb, BPF_INGRESS, &key);
+    }
     return TC_ACT_UNSPEC;
 }