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|F||Find||Find a remote app and connect or disconnect|
|R||Remote||Remote tunneling to connect User and Host|
NEGOTIATION_MESSAGE = ("F " FIND_STR) | ("R " REMOTE_STR) ; these are defined in this file
FIND_STR = F_SET_USER | F_SET_SECRET | F_SET_SERVER | F_SET_HOST | F_CONNECT | F_DISCONNECT | F_SHUTDOWN | F_YES | F_NO F_SET_USER = "set user " USER_NAME F_SET_SECRET = "set secret " PASSWORD F_SET_SERVER = "set server " SERVER_ID F_SET_HOST = "set host " HOST_ID F_CONNECT = "connect" F_DISCONNECT = "disconnect" F_SHUTDOWN = "shutdown" F_YES = "yes" F_NO = "no" | "no " CONNECT_REFUSAL_MESSAGE CONNECT_REFUSAL_MESSAGE = DISPLAY_STR
[Sequence] Find string may only be sent once a user-client connection is properly opened (ie after the link open sequence and describe sequence)
F_SHUTDOWN may only be sent from user to client, and only be sent once.
The F_SET_* strings may be sent multiple times (again, from user to client only).
The F_CONNECT may be sent (user to client) many times (as long as that SERVER_ID and HOST_ID combination is not already open). It may only be sent after at least one each of the F_SET_* commands has been sent. The response from the client must be either F_YES or F_NO.
The F_DISCONNECT string may only be set if that SERVER_ID and HOST_ID combination is already open.
[Example] USER --> CLIENT W 001B F set user BenjaminDisraeli USER --> CLIENT W 0016 F set secret CantGuess USER --> CLIENT W 001C F set server localhost:22201 USER --> CLIENT W 0014 F set host Harry.Com USER --> CLIENT W 0009 F connect CLIENT --> USER W 0005 F yes
REMOTE_STR = LINK_ID " | " OPAQUE_STR
[Sequence] A remote string may be sent or received any time the remote link identified by the link_id is open.
The opaque data is sent, unedited by the client and server, to the host.
When received, it is as sent by the host.
[Example] USER1 --> CLIENT1 R localhost:22201 ^ Harry.Com | [CHAT] Hi Steve, want to play a game? CLIENT1 --> SERVER R [CHAT] Hi Ben, want to play a game? SERVER --> HOST R WilliamGladstone | [CHAT] Hi Ben, want to play a game? HOST --> SERVER R BenjaminDisraeli | [CHAT] Bill says: Hi Ben, want to play a game? SERVER --> CLIENT2 R [CHAT] Bill says: Hi Ben, want to play a game? CLIENT2 --> USER2 R localhost:22201 ^ Harry.Com | [CHAT] Bill says: Hi Ben, want to play a game?