The `htlc_minimum_msat` parameter was ignored so far, and we'd be attempting to
pay and hitting a brick wall by doing so. This patch just skips channels that
are not eligible anyway.
We know the total channel capacity after checking for its existence on-chain, so
we can actually make use of that information to discard channels that don't have
a sufficient capacity anyway, reducing the number of failed attempts.
We were adding channels without their capacity, and eventually annotated them
when we exchanged `channel_update`s. This worked as long as we weren't
considering the channel capacity, but would result in local-only channels to be
unusable once we start checking.
'cursor < ser + max' isn't valid because we reduce 'max' as we go! Effectively
we'll stop once we're past halfway, which can only happen with ipv6 + a torv2
address.
Ths fix is one-line, but we rename 'max' to 'len' which makes its purpose
clearer.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
tal_count() is used where there's a type, even if it's char or u8, and
tal_bytelen() is going to replace tal_len() for clarity: it's only needed
where a pointer is void.
We shim tal_bytelen() for now.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We delay internally to reduce broadcastig route flap, but errors are
a special case: we want to send the latest, otherwise we might send an
old (non-disabled) update.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We used to just manually set ROUTING_FLAGS_DISABLED, but that means we
then suppressed the real channel_update because we thought it was a
duplicate!
So use a local flag: set it for the channel when the peer disconnects,
and clear it when channeld sends a local update.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
gossip_getnodes_entry was used by gossipd for reporting nodes, and for
reporting peers. But the local_features field is only available for peers,
and most other fields are only available from node_announcement.
Note that the connectd change actually means we get less information
about peers: gossipd used to do the node lookup for peers and include the
node_announcement information if it had it.
Since generate_wire.py can't create arrays-of-arrays, we add a 'struct
peer_features' to encapsulate the two feature arrays for each peer, and
for convenience we add it to lightningd/gossip_msg.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This patch guts gossipd of all peer-related functionality, and hands
all the peer-related requests to channeld instead.
gossipd now gets the final announcable addresses in its init msg, since
it doesn't handle socket binding any more.
lightningd now actually starts connectd, and activates it. The init
messages for both gossipd and connectd still contain redundant fields
which need cleaning up.
There are shims to handle the fact that connectd's wire messages are
still (mostly) gossipd messages.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
connectd has a dedicated fd to gossipd, so it can ask for a new gossip_fd
for a peer.
gossipd has a standalone routine to create a remote peer (this will
eventually be the only way gossipd creates a new peer).
For now lightningd creates a socketpair but doesn't run connectd, so
gossipd never sees any requests on this fd.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Store the two we care about as booleans. Once connectd is complete we won't
even have the feature bitmaps for peers.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We weren't waiting for gossipd to actually process the
dev_set_max_scids_encode_size message, so under Travis it sometimes
split the reply before processing that.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Note that we mark both directions of the channel disabled immediately,
it's just the broadcast of the update which is delayed, just like the
ones generated when channeld tells us to.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We disable the channel every time the peer disconnects; if it reconnects
we get two updates.
The simplest solution: delay all updates by 15 seconds. Replace any
pending delayed update. If update is redundant after 15 seconds,
discard.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This doesn't do anything for us now, since we actually tend to produce
DISABLE/ENABLE update pairs. But the infrastructure is useful for the
next patch.
We also add more details to the trace message in the core update code.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
json_listpeers returns an array of peers, and an array of nodes: the latter
is a subset of the former, and is used for printing alias/color information.
This changes it so there is a 1:1 correspondance between the peer information
and nodes, meaning no more O(n^2) search.
If there is no node_announce for a peer, we use a negative timestamp
(already used to indicate that the rest of the gossip_getnodes_entry
is not valid).
Other fixes:
1. Use get_node instead of iterating through the node map.
2. A node without addresses is perfectly valid: we have to use the timestamp
to see if the alias/color are set. Previously we wouldn't print that
if it didn't also advertize an address.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
structeq() is too dangerous: if a structure has padding, it can fail
silently.
The new ccan/structeq instead provides a macro to define foo_eq(),
which does the right thing in case of padding (which none of our
structures currently have anyway).
Upgrade ccan, and use it everywhere. Except run-peer-wire.c, which
is only testing code and can use raw memcmp(): valgrind will tell us
if padding exists.
Interestingly, we still declared short_channel_id_eq, even though
we didn't define it any more!
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We wrap it in 'struct pubkey' for typesafety and consistency, and the
next patch takes advantage of that when we move to pubkey_eq.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Only --addr implies announce-if-public: --bind-addr does not.
It's also possible to have --bind-addr to an automatic Tor address:
you'd have to dig the onion address out of the logs or getinfo to use
it, but it's possible.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is a best effort attempt to skip connection attempts if we detect a broken
ISP resolver. A broken ISP resolver is a resolver that will replace NXDOMAIN
replies with a dummy response. This is best effort in that it'll only detect a
single fixed dummy reply, it'll check only on startup, and will not detect if we
switched networks. It should be good enough for most cases, and in the worst
case it will result in a connection attempt that does not complete.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
Reported-by: Glenn Willen <@gwillen>
Cut & paste means we sometimes sent NULL:
```
2018-06-15T00:13:51.908Z lightningd(23653): lightning_closingd-03864ef025fde8fb587d989186ce6a4a186895ee44a926bfc370e2c366597a3f8f chan #436: Gossipd gave us bad send_gossip message 0bc80000
```
Fixes: #1581
Reported-by: @Xian001
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
In this case, local and remote are *both* NULL; so if someone tries to
send a packet with take(), we need to free it.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Christian Decker
Rusty Russell
practicalswift
arowser
William Casarin