The protocol is ASCII based, similar to the FTP protocol
All server responses are on one line and are prefixed by a three digit response code.
+== Paramaters ===
+<username> is a textual username unless the user does not have a username,
+in which case the username is of the form '#<id>' where <id> is a unique
+account number assigned by the server.
+<card_id_hex> is the hexadecimal byte stream representation of a MIFARE card.
+<item_id> is an item ID of the form '<type>:<id>', where <type> is an
+alpha-numeric diriver identifier, and <id> is an non-negative integer assigned
+by the driver.
+<ammount> is an integer number of cents representing the size of a transactio.
+Individual commands may restrict the range of the ammount to non-negative
+numbers.
+
+
== Response Codes ==
100 Information
200 Command succeeded, no extra information
general they will be limited to the standard alpha-numeric set
=== User Auth ===
+--- Untrusted Users ---
c USER <username>\n
-s 100 SALT <string>\n or 100 User Set\n (If no salt used)
+s 202 SALT <string>\n or 100 User Set\n (If no salt used)
c PASS <hash>\n (Hex-Encoded SHA-1 Hash of <username><salt><password>)
s 200 Auth OK\n or 401 Auth Failure\n
User is now authenticated
automatic authentication is allowed
c AUTOAUTH <username>\n
s 200 Auth OK\n or 404 Bad Username\n or 401 Untrusted\n
+--- Alternate Method (MIFARE Authentication)
+c MIFARE <card_id_hex>\n
+s 200 Auth OK as <username>\n or 401 Untrusted\n or 404 Bad Card ID\n
+
--- Set effective user (User in `dispense -u`) ---
c SETEUSER <username>\n
s 200 User set\n or 403 Not in coke\n or 404 User not found\n
=== Commands ===
--- Dispense an item ---
c DISPENSE <item_id>\n
-s 200 Dispense OK\n or 402 Poor You\n or 500 Dispense Error\n or 406 Bad Item\n
+s 200 Dispense OK\n or 402 Poor You\n or 406 Bad Item\n or 500 Dispense Error\n
--- Give to another user ---
c GIVE <user> <ammount> <reason>\n
s 200 Give OK\n or 402 Poor You\n or 404 Bad User\n
+--- Donate to the club ---
+c DONATE <ammount> <reason>\n
+s 200 Give OK\n or 402 Poor You\n
--- Alter balance ---
c ADD <user> <ammount> <reason>\n
s 200 Add OK\n or 402 No balance\n or 403 Not Coke\n or 404 Bad User\n
s 202 Item <item_id> <price> <description>\n
--- Get Users' Balances ---
- <max balance> and <min balance> can be '-' to indicate "none"
-c ENUM_USERS[ <min balance> [<max balance>]]\n
+c ENUM_USERS[ min_balance:<balance>][ max_balance:<balance>][ flags:<flagset>][ last_seen_before:<unix_timestamp>][ last_seen_after:<unix_timestamp>][ sort:<field>[-desc]]\n
s 201 Users <count>\n
s 202 User <username> <balance> <flags>\n
...
s 200 List End\n
+<balance> Integer balance value (in cents)
+<flagset> Flag values (same format as USER_FLAGS)
+<unix_timestamp> Number of seconds since 1/Jan/1970
+<field> Sort field (name,balance,lastseen)
--- Get a User's Balance ---
c USER_INFO\n
s 202 User <username> <balance> <flags>\n
s 200 User Added\n or 403 Not Wheel\n or 404 User Exists\n
--- Set user flags ---
<flags> is a comma-separated list of flag values (optionally preceded by
- - to remove the flag) Valid values are: user,coke,wheel,meta,disabled,door
+ - to remove the flag) Valid values are: user,coke,admin,internal,disabled,door
c USER_FLAGS <username> <flags>\n
s 200 User Updated\n or 403 Not Wheel\n or 404 Bad User\n or 407 Unknown Flags\n
+--- Add MIFARE ID ---
+c ADD_CARD <card id hex>\n
+s 200 User Updated\n or 405 Card already registered\n