This was a tricky one to find, it turns out that some nodes are sending
node_announcements even if they don't have a channel announced yet. If they are
a peer and the channel is currently verifying then we'll have a local channel in
the network view, hence accept the node_announcement, but when replaying, the
node_announcement will be replayed and we won't have a channel yet. This just
skips node_announcements, which is always safe.
Reported-by: @laszlohanyecz
Signed-off-by: Christian Decker <decker.christian@gmail.com>
Messages from peers and messages from the gossip_store now have completely
different entrypoints, so we don't need to trace their origin around the message
handling code any longer.
Moves any modifications based on an incoming gossip message into its own
function separate from the message verification. This allows us to skip
verification when reading messages from a trusted source, e.g., the
gossip_store, speeding up the gossip replay.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
When we read from the gossip_store we set store=false so that we don't duplicate
messages in the store.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
We currently keep two copies; one in the broadcast structure to send
in order, and one in the routing information. Since we already keep
the broadcast index in the routing information, use that.
Conveniently, a zero index is the same as the old NULL test.
Rename struct node's announcement_idx to node_announce_msgidx to
make it match the other users.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
As per BOLT #7.
We don't do this for channel_update which are queued because the
channel_announcement is pending though.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We already have 'struct node', so rename 'struct routing_channel' to
'struct chan', and 'struct node_connection' to 'struct half_chan'.
Other minor changes:
1. rstate->channels -> rstate->chanmap.
2. 'connections' -> 'half'.
3. connection_to -> half_chan_to
4. connection_from -> half_chan_from
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
The containing `struct routing_channel` contains src and dst, so
remove them. However, the channel_update msgidx does belong int
`struct node_connection` along with the channel_update.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
To remove the redundant fields in `struct node_connection` (ie. 'src'
and 'dst' pointers) we need to deal with `struct routing_channel`.
This means we get a series of channels, from which the direction is
implied, so it's a bit more complex to decode. We add a helper
`other_node` to help with this, and since we're the only user of
`connection_to` we change that function to return the index.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Failure and pruning were the two places where a node_connection could
be freed; now they both deal with entire channels, we can remove the
NULL checks, and the destructor.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is twice the 'update_channel_interval' we get handed.
We delete the non-existent channel_add_connection and delete_connection
declarations from the header too.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We make new_routing_channel() populate both connections
(active=false), so local_add_channel becomes simpler. We also
suppress listchannels output of active=false unannounced channels, to
avoid breaking tests (also, these are unusable, so it makes sense to
omit them)
It also seems the logic in add_channel_direction is legacy: a
channel_announce cannot replace the scid (that would be a different
channel), we don't allow duplicate announcements, and the announcement
is never NULL.
And since we disallow repeated channel_announce already, I believe
'forward' is always true, greatly simplifying the logic in
handle_pending_cannouncement.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This makes 'routing_channel' the primary object in the system; it can have
one or two 'node_connection's attached, and points to two nodes.
The nodes are freed when no more routing_channel refer to them. The
routing_channel are freed when they contain no more 'node_connection'.
This fixes#1072 which I surmise was caused by a dangling
routing_channel after pruning.
Each node contains a single array of 'routing_channel's, not one for
each direction. The 'routing_channel' itself orders nodes in key
order (conveniently the index is equal to the direction flag we use),
and 'node_connection' with source in the same order.
There are helpers to assist with common questions like "which
'node_connection' leads out of this node?".
There are now two ways to find a channel:
1. Direct scid lookup via rstate->channels map.
2. Node key lookup, followed by channel traversal.
Several FIXMEs are inserted for where we can now do things more optimally.
Fixes: #1072
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We're going to make it a first-class citizen, and pending routing_channel
are not real ones (in particular, we don't want to create pending nodes).
We had a linked list called rstate->pending_cannouncement which we didn't
actually use, so put that back for now and add a FIXME to use a faster
data structure.
We need to check that list now in handle_channel_update, but we never
have a real routing_channel and a pending, unless the routing_channel
isn't public.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Commit a57a2dcb86 introduced a time_t
in routing.h. So also move the time.h include to the header. This
fixes the build on FreeBSD.
Signed-off-by: Wladimir J. van der Laan <laanwj@gmail.com>
We were dropping these on the floor while checking for txout. So now
we add a map that holds announcements while we are checking.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
This is done it two parts, since we have to ask the main daemon to do
the lookup for us.
If this becomes a bottleneck, we can have a separate daemon, or even
an RPC pipe to bitcoind ourselves.
Fixes: #403
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It's just a sha256_double, but importantly when we convert it to a
string (in type_to_string, which is used in logging) we use
bitcoin_blkid_to_hex() so it's reversed as people expect.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We can't get them; channel_update doesn't support it.
# 1M nodes:
$ /gossipd/test/run-bench-find_route 1000000 1 > /tmp/out
=> 47677 msec
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This will later be used to determine whether or not we should announce
ourselves as a node.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
Christian Decker
practicalswift
Rusty Russell
ZmnSCPxj
Wladimir J. van der Laan