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fixeria uploaded patch set #2 to this change.

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osmo_dia2gsup: set sndbuf/recbuf explicitly for SCTP

When opening an SCTP socket on Linux, Erlang/OTP does set its own
default SO_SNDBUF/SO_RCVBUF values if the respective socket options
(sndbuf and recbuf) are not given to gen_sctp:open/N explicitly.

For some reason, the default RCVBUF size (1024) is much smaller than
the default SNDBUF size (65536), and both are well below modern Linux
defaults.  Such a small RCVBUF size becomes problematic when the
remote peer is sending large packets.

Let's explicitly set both sndbuf/recbuf parameters to 65536, allowing
the user to overwrite this default via the environment parameters.

For more details, see https://github.com/erlang/otp/issues/9722.

Change-Id: I793f1295ab42bfc548511fc5ffbda9070280745f
---
M src/osmo_dia2gsup.erl
1 file changed, 4 insertions(+), 1 deletion(-)

git pull ssh://gerrit.osmocom.org:29418/erlang/osmo_dia2gsup refs/changes/27/40127/2

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