/etc/sockd.route is in socks4-server 4.3.beta2-19build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | # routes for sockd
#
# IP of interface destination netmask for destination
# eg: 10.0.0.254 10.0.0.28 255.255.255.255
0.0.0.0 0.0.0.0 0.0.0.0
|