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Mark connection as closed on send error.

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I would have expected that no matter what causes the TCP connection to be closed would be reported as a TCP call back with lenghth = -1. However there are scenarios where this isn't true. I.e. when the user aborts during a blocking TCP retransmit opration. I'm unsure if this behaviour is to be considered a bug or if this is by some design I don't understand.

So I opted to not change that behaviour but rather add an explicit check for tcp_send returning with an error indicating that the connection is closed. This way the users gets noticed on the closed connection at least on his next key press.
This commit is contained in:
Oliver Schmidt 2017-06-05 18:21:59 +02:00
parent 2da0e849d7
commit ae4c369e39
1 changed files with 6 additions and 0 deletions
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6
apps/telnet65.s
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@ -306,6 +306,12 @@ send_char:
jsr tcp_send
bcs :+
rts
: lda ip65_error
cmp #KPR_ERROR_CONNECTION_CLOSED
bne :+
lda #1
sta connection_closed
rts
: ldax #send_error
jsr print_ascii_as_native
jmp print_error