Avoid sending a BYE before the ACK as per RFC3261: (!3732) · Merge requests · BC / public / liblinphone

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Andrea Gianarda requested to merge fix/405_method_not_allowed_5_4 into release/5.4 Oct 20, 2025

o A UA cannot send a BYE for a call until it has received an ACK for the initial INVITE. This was allowed in RFC 2543 but leads to a potential race condition.

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Avoid sending a BYE before the ACK as per RFC3261:

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