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Gered 2021-03-27 13:30:38 -04:00
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bindat_to_gcdl.c
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* This tool will take PRS-compressed quest .bin/.dat files and process them into a working .qst file that can be
* served up by a PSO server as a "download quest" which will be playable offline from a Gamecube memory card.
*
* This tool performs basically the same process that Qedit's save file type "Download Quest file(GC)" does.
*
* Note that .qst files created in this way cannot be used as "online" quests.
*
* Gered King, March 2021

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bindat_to_gcdl.md
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@ -4,6 +4,9 @@ This tool takes a set of `.bin` and `.dat` files for a Gamecube quest and turns
served up by a PSO server to Gamecube clients as "download quests" which can then be played by Gamecube users directly
from a memory card.
This tool performs basically the same process that [Qedit's](https://qedit.info/) save file type
"Download Quest file(GC)" does.
## Usage
Given two files, `quest.bin` and `quest.dat`, a download quest file, `download.qst`, could be created using:

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decrypt_packets.c
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* what PSO servers have done behind the scenes to prepare .bin/.dat quest files into something that works as an
* offline/download quest which is playable from a Gamecube memory card.
*
* Of course, after gaining an understanding about how this all works, I only then realized that Qedit can save quests
* directly to the necessary Gamecube download quest file format. Heh. Oh, well, that's just how it goes I guess! :-)
* This tool may still prove useful to anyone interested in understanding the packet exchanges between a PSO client
* and server I suppose.
*
* Given two binary files containing server->client and client->server packet data (separately), as long as the
* packet data was captured from the very beginning of the connection, this will decrypt the packet data and display
* it as raw packets.

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decrypt_packets.md
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@ -9,6 +9,12 @@ to serve up quests for download was resulting in unusable quest files on Gamecub
quest download communication better by analyzing the packets being sent from a working implementation and comparing it
to what my local login_server instance was sending proved invaluable to me.
Of course, once I spent a bunch of time looking at packet data and comparing things and gaining the understanding about
how Gamecube download quest data is composed and sent to the game client, I only then learnt that [Qedit](https://qedit.info/)
can save to a Gamecube download .qst file directly. Heh. :-) Oh well. This tool may still prove useful to anyone looking
to gain a better understanding of how PSO server/client communication works by looking at the packet exchanges directly
I guess.
## Network Protocol
After the initial `0x02` or `0x17` packet sent from the server to the client (which contains the client and server