This commit also includes:
- Storing the transport protocol in ConnID and ConnIDKey to allow tcp and
udp connections from the same IP/Port combinations. This happens in the
core.cisco-fabric-path test, for example.
- Lots of test updates. The reasons for these are two fold. First, with
the change to only store a single map means that TCP, UDP, and ICMP
connections are now mixed. When Zeek drains the map at shutdown, it drains
each of those protocols together instead of separately. The second is
because of how Sessions are stored in the map. We're now storing them
keyed by the hash of the key stored by the Session objects, which causes
them to again be in the map in a different order.
The RSTOS0 `conn_state` label is documented as "Originator sent a SYN
followed by a RST, never saw SYN-ACK from responder", but was previously
applied to cases where no originator SYN exists, like a single RST-only
packet.
This commit switches UID hashing from md5 to a highway hash. It also
moves the salt value out of the file plugin - and makes it
installation-specific instead - it is moved to the global namespace.
There now are digest hash functions to make "static"
installation-specific hashes that are stable over workers available to
everyone; hashes can be 64, 128 or 256 bits in size.
Due to the fact that we switch the file hashing algorithm, all file
hashes change.
The underlyigng algorithm that is used for hashing is highwayhash-128,
which is significantly faster than md5.
This makes conn.logs a bit prettier (and smaller) because all lines that
do not use a tunnel will now have a "-" instead of the "(empty)" for
tunnel_parents.
This option indicates that the Teredo analyzer should wait until
it sees both sides of a connection using a valid Teredo encapsulation
before issuing a protocol_confirmation. Previous behavior confirmed
on the first instance of a valid encapsulation, which could result
in more false positives (and e.g. bogus entries in known-services.log).
Addresses #890.
- Clarify "tunnel_changed" event documentation.
- Make expiration of "Tunnel::active" elements configuration via
"Tunnel::expiration_interval".
- Remove redundant registration of a connection's tunnels in
tunnel/main.bro's "tunnel_changed" handler.
- Rename "parents" field of "Conn::Info" to "tunnel_parents"
to give more context.
These are called "teredo_packet", "teredo_authentication",
"teredo_origin_indication", and "teredo_bubble" and may be raised
on a per-packet basis depending on Teredo encapsulation method.
