webrtc: Send RESET_STREAM on abrupt substream close#6
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timwu20 wants to merge 1 commit intotim/support-flagsfrom
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webrtc: Send RESET_STREAM on abrupt substream close#6timwu20 wants to merge 1 commit intotim/support-flagsfrom
timwu20 wants to merge 1 commit intotim/support-flagsfrom
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haikoschol
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Jan 20, 2026
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Summary
When a
Substreamis dropped without callingshutdown()(graceful close), theSubstreamHandlenow sends aRESET_STREAMflag to notify the remote peer of the abrupt termination. This follows the libp2p WebRTC specification for non-graceful stream termination.Changes
reset_sentfield toSubstreamHandleto track whether RESET_STREAM has been sentpoll_next()to detect abrupt closes (whenSubstreamis dropped without reachingFinAckedstate) and send RESET_STREAM before signaling closureshutdown()completes and state reachesFinAcked) do not send RESET_STREAMBehavior
shutdown()called, FIN_ACK received)SubstreamHandlereturnsNonedirectlySubstreamdropped withoutshutdown())SubstreamHandlesends RESET_STREAM, then returnsNone