VlanEncap Element sets incorrect network header offset #510
Description
VLANEncap elements adds the Vlan Tag and updates the network header offset anno but it is using pointer instead of click_ether_vlan which caused the packet updated with invalid network header offset anno.
Example click config which prints invalid config.
This is issue from vanilla click config.
fd :: FromDevice(eth0);
fd ->CheckIPHeader(OFFSET 14)-> VLANEncap(VLAN_TCI 100) -> p :: IPPrint(LABEL "VLANENCAP", CONTENTS HEX)->Discard;
1755611697.713985: 0.84.90.124 > 0.0.64.1: ip-proto-0 (frag 33024:0@800)
00000000 00000000 00000000 81000064 08004500 00545a7c
00004001 222b7f00 00017f00 00010000 519e48c9 04f63182
a4680000 0000c1e4 0a000000 00001011 12131415 16171819
1a1b1c1d 1e1f2021 22232425 26272829 2a2b2c2d 2e2f3031
32333435 3637