TelnetOutputStream incorrectly doubles-up IAC when sending IAC+EOR in BINARY
transmission mode
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Key: NET-335
URL: https://issues.apache.org/jira/browse/NET-335
Project: Commons Net
Issue Type: Bug
Components: Telnet
Affects Versions: 2.0, 1.4
Environment: Windows XP SP3, Java 1.6.0_21
Reporter: Chris Jones
This is related to NET-180 which I reported a couple of years back, and is
reported fixed in 2.1. I've since re-visited the code, and found another issue
background
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I have a TN5250 client (see rfc1205) which extends TelnetClient. Basically, the
client negotiates BINARY transmission and operates in block-mode. The client
sends IAC+EOR to notify the host that the data is complete, but the
TelnetOutputStream doubles-up the IAC automatically as if it was a data byte,
which iis not the case, resulting in IAC+IAC+EOR.
Two possible solutions come to mind:
1. Do not double-up IAC when in BINARY transmission in TelnetOutputStream (i.e.
leave it to the client)
2. Add a method to TelnetClient like -- sendCommand(byte b) {........} which
would act similar to sendAYT, only allowing the client to specify the value.
On balance, I like the second option, as it would give more future
possibilities.
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