ebpf tethering offload - only offload some src ips.

We don't want things like src ip ::, ::1, fe80::/64 being blindly
forwarded, since we're trying to behave like an ipv6 router.

Test: atest
Bug: 150808346
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Original-Change: https://android-review.googlesource.com/1321095
Merged-In: I43da7829caa7fc831bd17ada5750dc06b276804d
Change-Id: I43da7829caa7fc831bd17ada5750dc06b276804d
diff --git a/tests/netd_test.cpp b/tests/netd_test.cpp
index 77ff112..dd25f96 100644
--- a/tests/netd_test.cpp
+++ b/tests/netd_test.cpp
@@ -251,9 +251,9 @@
     uint64_t limit = ~0uLL;
     ASSERT_OK(bpfLimitMap.writeValue(k, limit, BPF_NOEXIST));
 
-    // minimal 'acceptable' 40-byte hoplimit 255 IPv6 packet
+    // minimal 'acceptable' 40-byte hoplimit 255 IPv6 packet, src ip 2000::
     uint8_t pkt[mtu] = {
-            0x60, 0, 0, 0, 0, 40, 0, 255,
+            0x60, 0, 0, 0, 0, 40, 0, 255, 0x20,
     };
 
     // Iterate over all packet sizes from minimal ipv6 packet to mtu.