=== DF-0569 build log (arithmetic proof + UDP trigger) ===
$ cc -O2 -o alias_port_oob_proof alias_port_oob_proof.c
$ cc -O2 -o nat_oob_trigger nat_oob_trigger.c
Build successful, no errors.

=== Patched module build log ===
$ cd /usr/src/sys/net/ipfw3_nat && make
cc -O2 -pipe -D_KERNEL ... -c ip_fw3_nat.c
cc -Wl,--build-id=sha1 ... -r -o ipfw3_nat.ko ip_fw3_nat.o
BUILD_EXIT=0
Module built successfully with fix.diff applied (8 ntohs() additions).