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GH-646: add new "successful_connection_remove" event

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And switch Zeek's base scripts over to using it in place of
"connection_state_remove".  The difference between the two is
that "connection_state_remove" is raised for all events while
"successful_connection_remove" excludes TCP connections that were never
established (just SYN packets).  There can be performance benefits
to this change for some use-cases.

There's also a new event called ``connection_successful`` and a new
``connection`` record field named "successful" to help indicate this new
property of connections.
This commit is contained in:
Jon Siwek 2019-11-02 11:12:00 -07:00
parent 75588956fc
commit 31f60853c9
48 changed files with 570 additions and 371 deletions
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4
scripts/base/protocols/ssl/main.zeek
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@ -329,13 +329,13 @@ event ssl_established(c: connection) &priority=-5
finish(c, T);
}
event connection_state_remove(c: connection) &priority=20
event successful_connection_remove(c: connection) &priority=20
{
if ( c?$ssl && ! c$ssl$logged )
hook ssl_finishing(c);
}
event connection_state_remove(c: connection) &priority=-5
event successful_connection_remove(c: connection) &priority=-5
{
if ( c?$ssl )
# called in case a SSL connection that has not been established terminates