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As part of looking at #1588 , I figured that sending `SOFTWARE` attribute is also part of a problem as it increases messages sent out by coturn and thus increasing amplification factor. For 4.6.2, the additional size is 24 bytes (4 bytes attribute header, and 20 bytes for "Coturn-4.6.2 'Gorst'") If we are to use an example from #1588, "A 62 byte request will be met with Coturn’s 401 Unauthorized response which is 150 bytes, a factor of ~2.42." - without SOFTWARE the response will be 126 bytes which reduces amplification factor to ~2. As I observed with multiple providers using coturn - some of the are sending it. Meaning, they do not set `--no-software-attribute` - most probably due to lack of clarity about this setting. I believe sending SOFTWARE_ATTRIBUTE should be off by default which is hinted in the RFC (https://datatracker.ietf.org/doc/html/rfc8489#section-16.1.2) Detailed changes: - Extract setting the attribute into a function to avoid code duplication - This option is now not reloadable - The option is now called `software_attribute` because inverse logic creates multiple double-not in the code which makes it harder to read. - `no-software_attribute` is still functional but marked as deprecated in documentation Test Plan: - Run local tests with different cli arguments (new and deprecated) and confirm SOFTWARE attribute is off by default, and added when arguments say so
Before you begin * copy db schema run ./cp-schema.sh * edit coturn/turnserver.conf according your db selection (mysql or postgresql or redis or mongodb) # start docker-compose -f docker-compose-all.yml up --build --detach # restart Notice: May restart needed for coturn container, if it could not access database yet, due initialization delay. docker restart docker_coturn_1 # stop docker-compose -f docker-compose-all.yml down # Or Stop with volume removal docker-compose down --volumes