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Sink.c: In the function ‘udp_port_match’:
Sink.c:52:13: Error: ‘struct udphdr’ does not have a member named ‘uh_dport’
      If (udph->uh_dport == htons(udp_port)) {

vale-tutorial.pdf page 16:

% pkt-gen -i vale0:vi0 –f tx (another terminal)
% pkt-gen -i vale0:vi1 –f rx % vale-ctl –n vi2
% vale-ctl –a vale0:vi2 (another terminal)
% pkt-gen –i vale0:vi2 –f tx (you don't see packets) 
# it should be -f rx, since the module logic is to send packets 
to port +1, 0 tx, 1 rx, so 2 can not receive packets.

I retrofitted sink.c to receive TCP instead of UDP, but for some reason, no TCP packets are received when I issue a TCP connect from elsewhere.
Exact same actions with tcpdump and, naturally, I would see a few TCP packets coming through and I would expect same behavior with tcp-ed sync.c (attched as nm_recv.c.txt), but no, I only see a few ARP packets coming through after a TCP connect (followed by a bunch of unrelated IPPROTO_UDP (type 17) or IPPROTO_IGMP (2), but no IPPROTO_TCP (6) whatsoever). I tried googling netmap tcp tutorial, but only presentations/info I already saw earlier come up (as well as Sandstorm). Would greatly appreciate a netmap-TCP tutorial or example. Thank you very much!

nm_recv.c.txt

mymodule_lin: Unknown symbol netmap_bdg_ctl (err 0)
mymodule_lin: Unknown symbol netmap_bdg_learning (err 0)

These are the errors printed by "dmesg | tail"

I downloaded this repo, and in "mymodule/LINUX" I typed:
make KSRC=/usr/src/linux-headers-XXX NSRC=/home/XXX/netmap
or
make KSRC=/usr/src/linux-sources-XXX NSRC=/home/XXX/netmap

neither worked