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Avoid logging pre-verstring EPIPE from sharing downstreams.

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If you use the new 'plink -shareexists' feature, then on Unix at least
it's possible for the upstream to receive EPIPE, because the
downstream makes a test connection and immediately closes it, so that
upstream fails to write its version string.

This looks a bit ugly in the upstream's Event Log, so I'm making a
special case: an error of 'broken pipe' type, which occurs on a socket
from a connection sharing downstream, before we've received a version
string from that downstream, is treated as an unusual kind of normal
connection termination and not logged as an error.
This commit is contained in:
Simon Tatham
2015-09-25 12:05:55 +01:00
parent 7c2ea22784
commit 5133d2a133
3 changed files with 25 additions and 2 deletions
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unix/unix.h
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@ -45,6 +45,8 @@ typedef void *Context; /* FIXME: probably needs changing */
extern Backend pty_backend;
#define BROKEN_PIPE_ERROR_CODE EPIPE /* used in sshshare.c */
typedef uint32_t uint32; /* C99: uint32_t defined in stdint.h */
#define PUTTY_UINT32_DEFINED