Allow binding to port 0 for OS-assigned ports#860
Allow binding to port 0 for OS-assigned ports#860joostjager wants to merge 1 commit intolightningdevkit:mainfrom
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👋 I see @tnull was un-assigned. |
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While I know about the flakiness issue, I can't say I'm loving all this additional complexity for very little actual (read: production) gain. Do we really need this?
src/lib.rs
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| payment_store: Arc<PaymentStore>, | ||
| lnurl_auth: Arc<LnurlAuth>, | ||
| /// Addresses the node is actively listening on. Set on `start()`, cleared on `stop()`. | ||
| active_listening_addresses: Arc<RwLock<Option<Vec<SocketAddress>>>>, |
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If we add all of that extra logic, etc, could we move these fields and the logic to ConnectionManager or at least connection.rs? Seems it would be the appropriate place?
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Moved to ConnectionManager, but it doesn't seem completely logical.
We've discussed various options offline. Another one is to do a loop around node creation in tests only. |
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Add support for configuring listening addresses with port 0, letting the OS pick a free port. After binding, the actual port is resolved via local_addr() and stored in last_bound_addresses on Node, preserved across restarts so the node rebinds the same ports. Node::listening_addresses() returns the last bound addresses when available, falling back to configured addresses. The gossip broadcast task and announcement_addresses() prefer actual bound addresses over configured ones, so OS-assigned ports are correctly announced. Port 0 is only allowed under cfg(test). In production, the builder rejects it to prevent accidentally announcing ephemeral ports. Tests now use 127.0.0.1:0 instead of a deterministic port picker, eliminating potential port collisions between concurrent test runs. AI tools were used in preparing this commit.
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Test port collision fix.