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>
I think this is what is causing #1536: getting disconnected causes gossipd to
attempt to reach the peer again, unconditionally setting the flag to tell the
master. At the same time the master also issues a reaching command (which is
allowed since it is its first), but then it clashes on the already set
flag. Setting this flag only when the master actually needs to be told should
fix this.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
A failed compaction shouldn't be deadly, but we should also not attempt to do
one on every gossip message after the first one fails.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
`gossip_store_add` is the entry point for messages from the network, so it
should do the bookkeeping and disable on failures. `gossip_store_append` is the
shared function that wraps messages and writes it to the given file. This is
shared between the from network path and the compaction path, so we don't
directly use the `gossip_store` instance, but `fd`s.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
We write both when coming from outside, as well as when compacting, so we
extract the write functionality to use it in both cases.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
This makes the exposed interface much smaller, cleaner and will allow us to just
replay gossip messages from the broadcast.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
Two cases:
1. Node no longer has any public channels: remove node_announcement.
2. Node's node_announcement now preceeds all the channel_announcements:
move node_announcement to the end.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This lets detect if a node announce preceeds a channel announce once we
delete the node announcement.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We *accept* a node_announce if we have a channel_announce, but we
can't queue it until we queue the channel_announce, which we only do
once we have recieved a channel_update.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Since we currently only (ab)use it to send everything, we need a way to
generate boutique queries for testing.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We have a function called 'wake_pkt_out' which is really 'start
gossiping', so rename it to 'wake_gossip_out'.
In addition, it's fired both on a timer, and in response to our first
gossip_timestamp_filter, which leads to very confusing (though,
technically, not incorrect) behavior.
Keep a single timer at all times, which now doubles as the flag to
indicating we're syncing right now. Set it once we're done syncing
gossip.
Technically this means we got from once-every-60-seconds to
quiet-for-60-seconds-between-gossip, but that's OK.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
And initialize filter (to "never") when we negotiated LOCAL_GOSSIP_QUERIES,
and send initial filter message.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is kind of orthogonal to the other changes, but makes sense: if we
would instantly or never prune the message, don't accept it.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We use the same system as for gossip: we trickle out replies when we're
otherwise idle.
As we trickle out replies to query_short_channel_ids, we remember the
pubkeys of nodes we mention. At the end, we sort and uniquify, and
then send any node_announcements we have for those.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We use the same system as for gossip: we trickle out replies when we're
otherwise idle.
This is minimal infrastructure: we don't actually process the
query_short_channel_ids message yet, nor do we append node
announcements.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
In general, we need to only publish node announcements after
publishing channel announcements, though we can accept node
announcements as soon as we see channel announcements. So we keep a
flag for those node_announcement which haven't been broadcast yet.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
handle_pending_cannouncement might not actually add the announcment,
as it could be waiting for a channel_update. We need to wait for
the actual announcement before considering announcing our node.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We generate new ones anyway; removing this code changes fixes coming
up which now only need to change one place.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We don't have any connection yet, so how could they be active? Disable both
sides to avoid trying to route through them or telling others to use them as
`contact_points` in invoices.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
We're telling gossipd about disconnections anyway, so let's just use that signal
to disable both sides of the channel.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
This was failing some of our integration tests, i.e., the ones closing a channel
and not waiting for sigexchange. The remote node would often not be quick enough
to send us its disabling channel_update, and hence we'd still remember the
incoming direction. That could then be sent out as part of an invoice, and fail
subsequently. So just set both directions to be disabled and let the onchain
spend clean up once it happens.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
This resolves the problem where both channeld and gossipd can generate
updates, and they can have the same timestamp. gossipd is always able
to generate them, so can ensure timestamp moves forward.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We erroneously create updates with the same timestamps when tests run
quickly, and the second one is ignored.
We've already noted that this should be fixed: gossipd should generate
all the updates, as it already has to do the case where channeld
crashed, for example. But that's a bigger change.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
@cdecker points out that in test_forward, where we manually create a route,
we get an error back which contains an update for an unknown channel.
We should still note this, but it's not an error for testing.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is something which generally shouldn't happen, but we didn't
notice it previously.
We ignore this warning in the case where a channel was deleted: this
happens because one side can send an update while the other notices
that the channel is closed.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Note: this will break the gossip_store if they have current channels,
but it will fail to parse and be discarded.
Have local_add_channel do just that: the update is logically separate
and can be sent separately.
This removes the ugly 'bool add_to_store' flag.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Tor wasn't actually working for me to connect to anything, but it worked
for 'ssh -D' testing.
Note that the resulting 'netaddr' is a bit weird, but I guess it's honest.
$ ./cli/lightning-cli connect 021f2cbffc4045ca2d70678ecf8ed75e488290874c9da38074f6d378248337062b
{
"id": "021f2cbffc4045ca2d70678ecf8ed75e488290874c9da38074f6d378248337062b"
}
$ ./cli/lightning-cli listpeers
{
"peers": [
{
"state": "GOSSIPING",
"id": "021f2cbffc4045ca2d70678ecf8ed75e488290874c9da38074f6d378248337062b",
"netaddr": [
"ln1qg0je0lugpzu5ttsv78vlrkhteyg9yy8fjw68qr57mfhsfyrxurzkq522ah.lseed.bitcoinstats.com:9735"
],
"connected": true,
"owner": "lightning_gossipd"
}
]
}
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Good for debugging (you have to send SIGUSR1 to lightning_gossipd to turn
it on though, and --log-level=io on the lightningd cmdline to have it
output IO messages by default).
I also noticed that io_tor_connect_after_req_host() does a useless
test on reach->buffer[0] after it's *written*: remove it.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Use a wireaddr_internal directly (which is what we want).
Also, don't hardcode 9735, use DEFAULT_PORT internally in
seed_resolve_addr().
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Previously it converted the wireaddr to a string internally: to support
unresolved names we need that done externally.
We actually tell the SOCKS5 proxy to do a domain lookup already, even
though we give use IP/IPv6 address, so this change is sufficient to
support connect-by-name.
Note replacement of assert() with an explicit case statement, which
has the benefit that the compiler complains when we add new
ADDR_INTERNAL types.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is useful for the next patch, where we want to hand the unresolved
name through to the proxy.
This also addresses @Saibato's worry that we still called getaddrinfo()
(with the AI_NUMERICHOST option) even if we didn't want a lookup.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Not all of them, but it's really about using the SOCKS proxy rather than
really using Tor at this level.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We assert() that it's set by one of the branches (it should be!) but
if we don't hit one it's uninitialized, not NULL.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
1. If we have a channel_announcement, the channel is public, otherwise
it's not. Not all channels are public, as they can be local: those
have a NULL channel_announcement.
2. If we don't have a channel_update, we know nothing about that half
of the channel, and no other fields are valid.
3. We can tell if a half channel is disabled by the flags field directly.
Note that we never send halfchannels without an update over
gossip_getchannels_reply so that marshalling/unmarshalling can be
vastly simplified.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Make the update/announce messages own the element in the broadcast map
not the other way around.
Then we keep a pointer to the message, and when we free it
(eg. channel closed, update replaces it), it gets freed from the
broadcast map automatically.
The result is much nicer!
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Basically, if we don't have an announcement for the channel, stash it,
and once we get an announcement, replay if necessary.
Fixes: #1485
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This means it will effect connect commands too (though it's too
late to stop DNS lookups caused by commandline options).
We also warn that this is one case where we allow forcing through Tor
without a proxy set: it just means all connections will fail.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This takes the Tor service address in the same option, rather than using
a separate one. Gossipd now digests this like any other type.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
For the moment, this is a straight handing of current parameters through
from master to the gossip daemon. Next we'll change that.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Risks leakage. We could do lookup via the proxy, but that's a TODO.
There's only one occurance of getaddrinfo (and no gethostbyname), so
we add a flag to the callers.
Note: the use of --always-use-proxy suppresses *all* DNS lookups, even
those from connect commands and the command line.
FIXME: An implicit setting of use_proxy_always is done in gossipd if it
determines that we are announcing nothing but Tor addresses, but that
does *not* suppress 'connect'.
This is fixed in a later patch.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
1. Only force proxy use if we don't announce any non-TOR address.
There's no option to turn it off, so this makes more sense.
2. Don't assume we want an IPv4 socket to reach proxy, use the family
from the struct addrinfo.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Instead of storing a wireaddr and converting to an addrinfo every
time, just convert once (which also avoids the memory leak in the
current code).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rename tor_proxyaddrs and tor_serviceaddrs to tor_proxyaddr and tor_serviceaddr:
the 's' at the end suggests that there can be more than one.
Make them NULL or non-NULL, rather than using all-zero if unset.
Hand them the same way to gossipd; it's a bit of a hack since we don't
have optional fields, so we use a counter which is always 0 or 1.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
All gossipd needs from common/tor is do_we_use_tor_addr(), so move
that and the rest of the tor-specific handshake code into gossip/tor.c
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is a rebased and combined patch for Tor support. It is extensively
reworked in the following patches, but the basis remains Saibato's work,
so it seemed fairest to begin with this.
Minor changes:
1. Use --announce-addr instead of --tor-external.
2. I also reverted some whitespace and unrelated changes from the patch.
3. Removed unnecessary ';' after } in functions.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is a leftover from before splitting the `gossip_store` injection path from
the handling of gossip messages.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
Someone could try to announce an internal address, and we might probe
it.
This breaks tests, so we add '--dev-allow-localhost' for our tests, so
we don't eliminate that one. Of course, now we need to skip some more
tests in non-developer mode.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
If we're given a wildcard address, we can't announce it like that: we need
to try to turn it into a real address (using guess_address). Then we
use that address. As a side-effect of this cleanup, we only announce
*any* '--addr' if it's routable.
This fix means that our tests have to force '--announce-addr' because
otherwise localhost isn't routable.
This means that gossipd really controls the addresses now, and breaks
them into two arrays: what we bind to, and what we announce. That is
now what we return to the master for json_getinfo(), which prints them
as 'bindings' and 'addresses' respectively.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
1. Add special option where an empty host means 'wildcard for IPv4 and/or IPv6'
which means ':1234' can be used to set only the portnum.
2. Only add this protocol wildcard if --autolisten=1 (default)
and no other addresses specified.
3. Pass it down to gossipd, so it can handle errors correctly: in most cases,
it's fatal not to be able to bind to a port, but for this case, it's OK
if we can only bind to one of IPv4/v6 (fatal iff neither).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This replacement is a little menial, but it explicitly catches all
the places where we allow a local socket. The actual implementation of
opening a AF_UNIX socket is almost hidden in the patch.
The detection of "valid address" is now more complex:
p->addr.itype != ADDR_INTERNAL_WIREADDR || p->addr.u.wireaddr.type != ADDR_TYPE_PADDING
But most places we do this, we should audit: I'm pretty sure we can't
get an invalid address any more from gossipd (they may be in db, but
we should fix that too).
Closes: #1323
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It does all the other address handling, do this too. It also proves useful
as we clean up wildcard address handling.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It's become clear that our network options are insufficient, with the coming
addition of Tor and unix domain support.
Currently:
1. We always bind to local IPv4 and IPv6 sockets, unless --port=0, --offline,
or any address is specified explicitly. If they're routable, we announce.
2. --addr is used to announce, but not to control binding.
After this change:
1. --port is deprecated.
2. --addr controls what we bind to and announce.
3. --bind-addr/--announce-addr can be used to control one and not the other.
4. Unless --autolisten=0, we add local IPv4 & IPv6 port 9735 (and announce if they are routable).
5. --offline still overrides listening (though announcing is still the same).
This means we can bind to as many ports/interfaces as we want, and for
special effects we can announce different things (eg. we're sitting
behind a port forward or a proxy).
What remains to implement is semi-automatic binding: we should be able
to say '--addr=0.0.0.0:9999' and have the address resolve at bind
time, or even '--addr=0.0.0.0:0' and have the port autoresolve too
(you could determine what it was from 'lightning-cli getinfo'.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We set no_reconnect with --offline, but that doesn't work if !DEVELOPER.
Make the flag positive, and non-DEVELOPER mode for gossipd.
We also don't override portnum with --offline, but have an explicit
'listen' flag.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This means gossipd is live and we can tell it things, but it won't
receive incoming connections. The split also means that the main daemon
continues (eg. loading peers from db) while gossipd is loading from the store,
potentially speeding startup.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
If channeld dies for some reason (eg, reconnect) and we didn't yet announce
the channel, we can miss doing so. This is unusual, because if lightningd
restarts it rearms the callback which gives us funding_locked, so it only
happens if just channel dies before sending the announcement message.
This problem applies to both temporary announcement (for gossipd) and
the real one. For the temporary one, simply re-send on startup, and
remote the error msg gossipd gives if it sees a second one. For the
real one, we need a flag to tell us the depth is sufficient; the peer
will ignore re-sends anyway.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
When a connect fails, if it's an important peer, we set a timer. If
we have a manual connect command, this means we do this again, leading
to another timer.
For a manual command, free any existing timer; the normal fail logic
will start another if necessary.
Reported-by: @ZmnSCPxj
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
At least say whether we failed to connect at all, or failed cryptographic
handshake, or failed reading/writing init messages.
The errno can be "Operation now in progress" if the other end closes the
socket on us: this happens when we handshake with the wrong key and it
hangs up on us. Fixing this would require work on ccan/io though.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
When we get a reconnection, kill the current remote peer, and wait for the
master to tell us it's dead. Then we hand it the new peer.
Previously, we would end up with gossipd holding multiple peers, and
the logging was really hard to interpret; I'm not completely convinced
that we did the right thing when one terminated, either.
Note that this now means we can have peers with neither ->local nor ->remote
populated, so we check that more carefully.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Currently we intuit it from the fd being closed, but that may happen out
of order with when the master thinks it's dead.
So now if the gossip fd closes we just ignore it, and we'll get a
notification from the master when the peer is disconnected.
The notification is slightly ugly in that we have to disable it for
a channel when we manually hand the channel back to gossipd.
Note: as stands, this is racy with reconnects. See the next patch.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This was sitting in my gossip-enchancement patch queue, but it simplifies
this set too, so I moved it here).
In 94711969f we added an explicit gossip_index so when gossipd gets
peers back from other daemons, it knows what gossip it has sent (since
gossipd can send gossip after the other daemon is already complete).
This solution is insufficient for the more general case where gossipd
wants to send other messages reliably, so replace it with the other
solution: have gossipd drain the "gossip fd" which the daemon returns.
This turns out to be quite simple, and is probably how I should have
done it originally :(
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
1. Lifetime of 'struct reaching' now only while we're actively doing connect.
2. Always free after a single attempt: if it's an important peer, retry
on a timer.
3. Have a single response message to master, rather than relying on
peer_connected on success and other msgs on failure.
4. If we are actively connecting and we get another command for the same
id, just increment the counter
The result is much simpler in the master daemon, and much nicer for
reconnection: if they say to connect they get an immediate response,
rather than waiting for 10 retries. Even if it's an important peer,
it fires off another reconnect attempt, unless it's actively
connecting now.
This removes exponential backoff: that's restored in next patch. It
also doesn't handle multiple addresses for a single peer.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rather than using a flag in reaching/peer; we make it self-contained
as the next patch puts it straight into a timer callback.
Also remove unused 'succeeded' field from struct peer.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
And on channel_fail_permanent and closing (the two places we drop to
chain), we tell gossipd it's no longer important.
Fixes: #1316
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
These don't have a maximum number of reconnect attempts, and ensure
that we try to reconnect when the peer dies.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
These were so far only used for bolt11 construction, but we'll need them for the
DNS seed as well, so here we just pull them out into their own unit and prefix
them.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
We're about to remove automatic retrying of connect, and that uncovered
that we actually print out our "Server started" message before we create
the listening socket.
Move the init higher (outside the db transaction) and make it a
request/response, the loop until it's done.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Christian points out that we don't get spend notifications for old
channels if we truncate the store. We'd need more work to do this,
either validating the channels are still unspent, or replaying old
blocks from the truncation point.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Since we open with O_APPEND, any write() will append as we want it to.
But we want to distinguish a new store creation from a truncation due
to bad version.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
If something goes (fatally) wrong, we won't add it to the store.
This reveals a latent bug in routing_add_channel_announcement() and
friend which did a take() on msg, which it doesn't own. TAKES means
that it will take ownership IF the caller requests, not an unconditional
ownership transfer (which is an antipattern).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We enter nodes in the map when we create channels, but those channels
could be local and unannounced. This triggered a failure in
test_gossip_persistence since the store truncated when it saw the
first thing was a node_announce.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell
arowser
Christian Decker
William Casarin
practicalswift
Saibato
ZmnSCPxj
conanoc