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laforge has posted comments on this change by pespin. ( https://gerrit.osmocom.org/c/osmo-iuh/+/40974?usp=email )

Change subject: ranap: Introduce ranap_new_msg_error_ind() ......................................................................

Patch Set 2: Code-Review+1

(1 comment)

Patchset:

PS2:

Could you describe a little bit more about the usage of the error indication? […]

without reading the specific 3gpp spec in mind: In any ITU protocol, an "Error indication" is a unilateral message saying "there was an error as specified by the cause value".

The function to create such a message (at the sender side) is used whenever the spec says we should generate such a message.

Whatever the recipient does in reaction is out of scope here, as this code is just generating a to-be-sent message.