Fix problem with loss at low packet rate

[seth]

Everyone that runs the 2.0 beta is having trouble with packet loss at very low volume. It seems to come from the default snaplength increase to 65535 and the inability with the old libpcap api to effectively increase the buffer size.

I don't know how to solve this problem yet, but we need to fix it very soon and it's a definite blocker for the release.

[robin]

I think we should change this back to the old default and also add a new script-level variable snaplen to change (and may deprecate the -s option then).

[seth]

Jon, could you take care of this?

[jsiwek]

In [645c80f9742049e45cab9f7349ed34a1ddb722d8/bro]:

Reduce snaplen default from 65535 to old default of 8192. (fixes #720)

Also replaced the --snaplen/-l command line option with a
scripting-layer option called "snaplen" (which can also be
redefined on the command line, e.g. bro -i eth0 snaplen=65535).

[robin]

In [edb6e80ff36e162dec0fe25c231f985fe8a3c24c/bro]:

Merge remote-tracking branch 'origin/fastpath'

• origin/fastpath: Remove upgrade documentation regarding change in default snaplen. Reduce snaplen default from 65535 to old default of 8192. (fixes #720)

Closes #720.

[robin]

Milestone Bro2.0 deleted