Here is a list of all documented files with brief descriptions:

attr.c
callback.c
fib-test.c
genl-family-get.c
genl-group-events.c
kobject-event.c
libmnl.h
msg.c
nf-log.c
nf-queue.c
nfct-create-batch.c
nfct-daemon.c
nfct-dump.c
nfct-event.c
nft-event.c
nl-crash.c
nlmsg.c
receiver.c
rtnl-addr-dump.c
rtnl-link-dump.c
rtnl-link-dump2.c
rtnl-link-dump3.c
rtnl-link-event.c
rtnl-link-set.c
rtnl-route-add.c
rtnl-route-dump.c
rtnl-route-event.c
sender.c
socket.c
uevent.c
x.c