While one side was not produced by us, we have a vested interest in propagating it.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Added: Protocol: When we send our own gossip when a peer connects, also send any incoming channel_updates.
@endothermicdev and I found this while investigating a "nobody sees my node_announcement" bug report.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Fixes: #6410
Reported-by: benjaminchodroff on discord
Changelog-Fixed: Protocol: When we send our own gossip when a peer connects, send our node_announcement too (regression in v23.05)
Alex and I were reading it and I got confused: it's really a simpler loop
than it seems, with all those redundant `continue` statements.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We keep several peer pointers, but we just add a hook to NULL them
manually when a peer dies, rather than using voodoo.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We use a "softref" which is a magic pointer which gets NULL'ed when
the object is freed. But it's heavy, and a bit tricky to use, and we
only use it in gossipd.
Instead, keep the nodeid, and do a lookup (now that's fast) if we want
to credit the sender for valid gossip.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This was previously the role of connectd, but it's actually more
efficient for us to do it: connectd has to sweep through the entire
gossip_store, but we have datastructures for this already.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Though BOLT 7 says a channel may be pruned when one side becomes inactive
and fails to refresh their channel_update, in practice, the
channel_announcement can be difficult to recover if deleted entirely.
Here the channel_announcement is tagged as zombie such that gossip_store
consumers may safely ignore it, but it may be retained should the channel
come back online in the future. Node_announcements and channel_updates may
also be retained in such a fashion until the channel is ready to be
resurrected.
Changelog-Fixed: Pruned channels are more reliably restored.
This adds the option to explicitly enable ip-discovery, which maybe
helpful for example when a user wants TOR announced along with
discovered IPs to improve connectivity and have TOR just as a fallback.
Changelog-Added: Adds config switch 'announce-addr-discovered': on/off/auto
This adds a new "chan_dying" message to the gossip_store, but since we
already changed the minor version in this PR, we don't bump it again.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Added: Protocol: We now delay forgetting funding-spent channels for 12 blocks (as per latest BOLTs, to support splicing in future).
It's a bit more optimal, and tells gossipd exactly what height the
spend occurred at (with multiple blocks, it's not always the current
height!). It will need that next patch.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Add memleak_ignore_children() so callers can do exclusions themselves.
Having two exclusions was always such a hack!
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is cleaner because, the `remote_addr` and `discovered_ip` are
related but two different things.
Within connectd and lightningd we use the peers `remote_addr` feature
to validate (and guess a port) to be used for IP discovery.
Also when a peer reports us a `remote_addr`, this is given to the plugin API
via the `peer_connected` hook. The network port here is not modified for
godd reason! This can be used i.e. to detect if we are behind a NAT.
But once lightningd figures enough peers report the same `remote_addr`,
it sets the port to the selected network and tells gossipd to use that for
`node_announcement` updates.
Hence, within gossipd, there is no (should not be) `remote_addr`.
Changelog-None
This contains the zeroconf stuff, with funding_locked renamed to
channel_ready. I change that everywhere, and try to fix up the
comments.
Also the `alias` field is called `short_channel_id`.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Changed: Protocol: `funding_locked` is now called `channel_ready` as per latest BOLTs.
This commit got reduced to just changing a comment because
the stuff it initially did was already merged in before by
commit 7ff62b4a
So I just kept the changed comment as its more precise.
Changelog-None
Gossipd didn't actually suppress all gossip, resulting in a flake!
Doing it in connectd now makes much more sense.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Requiring the caller to allocate them is ugly, and differs from
other types.
This means we need a context arg if we don't have one already.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Simply exit, like we do when master daemon_conn exits.
```
Valgrind error file: valgrind-errors.2211908
==2211908== Invalid read of size 8
==2211908== at 0x12AC13: daemon_conn_send (daemon_conn.c:137)
==2211908== by 0x113CD9: queue_peer_msg (gossipd.c:118)
==2211908== by 0x11B806: query_channel_range (queries.c:1169)
==2211908== by 0x1250DD: peer_gossip_probe_scids (seeker.c:706)
==2211908== by 0x1253B1: check_firstpeer (seeker.c:788)
==2211908== by 0x1256CA: seeker_check (seeker.c:884)
==2211908== by 0x1366AC: timer_expired (timeout.c:62)
==2211908== by 0x1163D1: main (gossipd.c:1146)
==2211908== Address 0x4cafdf0 is 48 bytes inside a block of size 88 free'd
==2211908== at 0x48460C4: free (vg_replace_malloc.c:872)
==2211908== by 0x1805EA: del_tree (tal.c:421)
==2211908== by 0x1808BE: tal_free (tal.c:486)
==2211908== by 0x12AB25: destroy_dc_from_conn (daemon_conn.c:112)
==2211908== by 0x17FFDF: notify (tal.c:237)
==2211908== by 0x180519: del_tree (tal.c:402)
==2211908== by 0x1808BE: tal_free (tal.c:486)
==2211908== by 0x16EE9A: io_close (io.c:450)
==2211908== by 0x16ECA9: do_plan (io.c:401)
==2211908== by 0x16ED16: io_ready (io.c:417)
==2211908== by 0x1710B2: io_loop (poll.c:453)
==2211908== by 0x1163C5: main (gossipd.c:1144)
==2211908== Block was alloc'd at
==2211908== at 0x484384F: malloc (vg_replace_malloc.c:381)
==2211908== by 0x180064: allocate (tal.c:250)
==2211908== by 0x180634: tal_alloc_ (tal.c:428)
==2211908== by 0x12AB65: daemon_conn_new_ (daemon_conn.c:122)
==2211908== by 0x1155F4: gossip_init (gossipd.c:763)
==2211908== by 0x116014: recv_req (gossipd.c:999)
==2211908== by 0x12A828: handle_read (daemon_conn.c:31)
==2211908== by 0x16E09F: next_plan (io.c:59)
==2211908== by 0x16ECD4: do_plan (io.c:407)
==2211908== by 0x16ED16: io_ready (io.c:417)
==2211908== by 0x1710B2: io_loop (poll.c:453)
==2211908== by 0x1163C5: main (gossipd.c:1144)
==2211908==
```
This is the cheapest algo I came up with that simply checks that the
same `remote_addr` has been report by two different peers. Can be
improved in many ways:
- Check by connecting to a radonm peers in the network
- Check for more than two confirmations or a certain fraction
- ...
Changelog-Added: Send updated node_annoucement when two peers report the same remote_addr.
Even if nothing has changed. Note that this is different from simply
re-xmitting the old one, in that it has a different timestamp, so others
will re-xmit it too.
This is a side-effect of reports that node_announcement propagation
through the network is poor:
https://github.com/ElementsProject/lightning/issues/5037
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Protocol: We now refresh our ndoe_announcement every 24 hours, due to propagation issues.
Gossipd now simply gets told by channeld when peers arrive or leave.
(it only needs to know for the seeker).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We also no longer strip the type off: everyone handles both forms, and
Eclair doesn't strip (and it's easier!).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We want it to keep the latest, so it can make its own error msgs without
asking us. This installs (but does not use!) the message handler.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
An "err" is only returned if the channel_update is malformed: more common
is that it's fine, but we don't know the scid.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It's weird to have connectd ask gossipd, when lightningd can just do it
and hand all the addresses together.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We now let gossipd do it.
This also means there's nothing left in 'struct per_peer_state' to
send across the wire (the fds are sent separately), so that gets
removed from wire messages too.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
