Attention is currently required from: arehbein.

laforge has posted comments on this change. ( 
https://gerrit.osmocom.org/c/libosmo-sccp/+/35073?usp=email )

Change subject: port from osmo_stream_*_get_ofd() to osmo_stream_srv_get_fd()
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Patch Set 1:

(1 comment)

File src/osmo_ss7_asp.c:

https://gerrit.osmocom.org/c/libosmo-sccp/+/35073/comment/3820fecd_d0282112
PS1, Line 915:  return ipa_rx_msg(asp, msg, fd & 0xf);
> probably very problematic without a check `if (fd < 0)` ... […]
no, not problematic at all.  All we're doing here is choosing the SLS (link 
selector within a linkset).  That's basically a "random" number between 0..15 
(hence the 0xF).  We're just abusing the property that file descriptors lower 4 
bits are presumably "reasonably distributed" so that we get some spread over 
different SLS.

I would argue fd < 0 can never happen in the first place, as the function is 
only called in a context where the file dscriptor is long initialized, as we're 
alreay reading data.

But let's assume the fd would be negative: All we'd do is tale the lower 4 bits 
of -1 (0xF) and use that as SLS.  Nothing wrong with that.



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Gerrit-Project: libosmo-sccp
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Gerrit-Change-Id: I12c66badfb4bdfdfe71f1716de960d353d3548b1
Gerrit-Change-Number: 35073
Gerrit-PatchSet: 1
Gerrit-Owner: laforge <lafo...@osmocom.org>
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