DSCfix aims to improve the online experience when attempting to engage in jolly cooperation with friends. It is an interception DLL intended to be used with DSfix and functions by adding any online GFWL friends to your P2P connection pool before searching for random peers. This means that direct connections to friends are established right away, whereas in vanilla Dark Souls this only happens after the first successful summon or invasion (if you were even lucky to get that far).

This greatly reduces the time required to summon a friend, with typical wait times of about a few seconds.

What DSCfix does do:
-- Intercepts GFWL matchmaking functions to return a friend's session if available. This is repeated until all online friends are connected to, at which point it resumes normal behavior of looking for random peers.
-- Allows near-instantaneous summoning / invasion of friends, as well as other network info exchanged such as bloodstains, visible blue ghosts / bonfire phantoms, bonfire kindling, etc.

What DSCfix does NOT do:
-- Change any rules of summoning or invading (area boss must not be defeated, players must still be within level range, host must be human, etc.)
-- Fix any NAT related problems. If you have a strict NAT (as reported by GFWL) and have not been able to successfully summon/be summoned, DSCfix will probably not help.
-- Otherwise tamper with any aspect of Dark Souls gameplay. The connections it establishes with friends are the exact same as those established after successfully summoning / invading a player.