Christian and I both unwittingly used it in form:
*tal_arr_expand(&x) = tal(x, ...)
Since '=' isn't a sequence point, the compiler can (and does!) cache
the value of x, handing it to tal *after* tal_arr_expand() moves it
due to tal_resize().
The new version is somewhat less convenient to use, but doesn't have
this problem, since the assignment is always evaluated after the
resize.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is mainly just copying over the copy-editing from the
lightning-rfc repository.
[ Split to just perform changes after the UNKNOWN_PAYMENT_HASH change --RR ]
Signed-off-by: Christian Decker <decker.christian@gmail.com>
Reported-by: Rusty Russell <@rustyrussell>
This is mainly just copying over the copy-editing from the
lightning-rfc repository.
[ Split to just perform changes prior to the UNKNOWN_PAYMENT_HASH change --RR ]
Signed-off-by: Christian Decker <decker.christian@gmail.com>
Reported-by: Rusty Russell <@rustyrussell>
This causes a compiler warning if we don't do something with the
result (hopefully return immediately!).
We use was_pending() to ignore the result in the case where we
complete a command in a callback (thus really do want to ignore
the result).
This actually fixes one bug: we didn't return after command_fail
in json_getroute with a bad seed value.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Handers of a specific form are both designed to be used as callbacks
for param(), and also dispose of the command if something goes wrong.
Make them return the 'struct command_result *' from command_failed(),
or NULL.
Renaming them just makes sense: json_tok_XXX is used for non-command-freeing
parsers too.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
These routines free the 'struct command': a common coding error is not
to return immediately.
To catch this, we make them return a non-NULL 'struct command_result
*', and we're going to make the command handlers return the same (to
encourage 'return command_fail(...)'-style usage).
We also provide two sources for external use:
1. command_param_failed() when param() fails.
2. command_its_complicated() for some complex cases.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
These are only supposed to be used when you want the token contents including
surrounding "". We should use this when reporting errors, but usually
we just want to access the tok members directly.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This was removed (as unused) in 6269a4c55d592e8720b7f2a304c21f61f7931238;
now I've even added tests.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We have an incompatibility with lnd it seems: I've lost channels on
reconnect with 'sync error'. Since I never got this code to be reliable,
disable it for next release since I suspect it's our fault :(
And reenable the check which didn't work, for others to untangle.
I couldn't get option_data_loss_protect to be reliable, and I disabled
the check. This was a mistake, I should have either spent even more
time trying to get to the bottom of this (especially, writing test
vectors for the spec and testing against other implementations).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
json_escaped.[ch], param.[ch] and jsonrpc_errors.h move from lightningd/
to common/. Tests moved too.
We add a new 'common/json_tok.[ch]' for the common parameter parsing
routines which a plugin might want, taking them out of
lightningd/json.c (which now only contains the lightningd-specific
ones).
The rest is mainly fixing up includes.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
I want to use param functions in plugins, and they don't have struct
command.
I had to use a special arg to param() for check to flag it as allowing
extra parameters, rather than adding a one-use accessor.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
json_tok* is used with 'struct command', so rename this to match the other
low-level json tok helpers.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This currently just invokes GDB, but we could generalize it (though
pdb doesn't allow attaching to a running process, other python
debuggers seem to).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is prep work for when we sign htlc txs with
SIGHASH_SINGLE|SIGHASH_ANYONECANPAY.
We still deal with raw signatures for the htlc txs at the moment, since
we send them like that across the wire, and changing that was simply too
painful (for the moment?).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We currently generally assume the features we offer are fixed; this
makes the code clearer and handles where we offer features iff
EXPERIMENTAL_FEATURES=1
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Needed for check command. I left the print function in since it was so
convenient for debugging purposes.
Signed-off-by: Mark Beckwith <wythe@intrig.com>
This simplifies lifetime assumptions. Currently all callers keep the
original around, but everything broke when I changed that in the next
patch.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
They were not universally used, and most are trivial accessors anyway.
The exception is getting the channel reserve: we have to multiply by 1000
as well as flip direction, so keep that one.
The BOLT quotes move to `struct channel_config`.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We only take the pubkey and ignore all other fields, so we might as well
save the cycles used computing the hash for something else.
Signed-off-by: Jon Griffiths <jon_p_griffiths@yahoo.com>
We probably also want to call secp_randomise/wally_secp_randomize here
too, and since these calls all call setup_tmpctx, it probably makes
sense to have a helper function to do all that. Until thats done, I
modified the tests so grepping will show the places where the sequence
of calls is repeated.
Signed-off-by: Jon Griffiths <jon_p_griffiths@yahoo.com>
This avoids some very ugly switch() statements which mixed the two,
but we also take the chance to rename 'towire_gossip_' to
'towire_gossipd_' for those inter-daemon messages; they're messages to
gossipd, not gossip messages.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We had at least one bug caused by it not returning true when it had
queued something. Instead, just re-check thq queue after it's called.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
If you steal something onto its own child, you create a loop. These are
expensive to check for at runtime, but they can hide from memleak and are
usually a bad idea. So we add a tal_steal() notify which does this work
in DEVELOPER mdoe.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This way there's no need for a context pointer, and freeing a msg_queue
frees its contents, as expected.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It means an extra allocation at startup, but it means we can hide the definition,
and use standard patterns (new_daemon_conn and typesafe callbacks).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This was suggested by Pierre-Marie as the solution to the 'same HTLC,
different CLTV' signature mismatch.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It's the only user of them, and it's going to get optimized.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
gossip.pydiff --git a/common/test/run-json.c b/common/test/run-json.c
index 956fdda35..db52d6b01 100644
This also highlights the danger of searching the logs: that error
appeared previously in the logs, so we didn't notice that the actual
withdraw call gave a different error.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Give a clear error at the beginning if it's not bolt11 payment,
rather than falling foul of other checks.
This will work at least until some altcoin adapts the 'ln' prefix :)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Totally forgot to add this test. It just shows how a writer can take
exclusive access of a socket over multiple `io_write` calls, and
queuing all others behind it.
We've done this a number of times already where we're getting
exclusive access to either the out direction of a connection, or we
try to lock out the read side while we are responding to a previous
request. They usually are really cumbersome because we reach around to
the other direction to stop it from proceeding, or we flag our
exclusive access somewhere, and we always need to know whom to notify.
PR ElementsProject/lightning#1970 adds two new instances of this:
- Streaming a JSON response requires that nothing else should write
while the stream is active.
- We also want to stop reading new requests while we are responding
to one.
To remove the complexity of having to know whom to stop and notify
when we're done, this adds a simple `io_lock` primitive that can be
used to get exclusive access to a connection. This inverts the
requirement for notifications, since everybody registers interest in
the lock and they get notified if the lock holder releases it.
connectd is the only user of the cryptomsg async APIs; better to
open-code it here. We need to expose a little from cryptomsg(),
but we remove the 'struct peer' entirely from connectd.
One trick is that we still need to defer telling lightningd when a
peer reconnects (until it tells us the old one is disconnected). So
now we generate the message for lightningd and send it once we're woken.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We do this a lot, and had boutique helpers in various places. So add
a more generic one; for convenience it returns a pointer to the new
end element.
I prefer the name tal_arr_expand to tal_arr_append, since it's up to
the caller to populate the new array entry.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It turns out we were heavily relying on the fact that after each message from
the client there'd be a flush, and that there would not be anything after the
JSON object we read. This will no longer be the case once we start streaming
things or we are very quick in issuing the JSON-RPC requests.
This just takes one of the error paths (incomplete read) and makes it into a
successful path if we have indeed read a full root element.
That matches the other CSV names (HSM was the first, so it was written
before the pattern emerged).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
this enables addr like --addr=autotor:127.0.0.1 or
--addr=autotor:localhost to just use the default tor service port
Signed-off-by: Saibato <Saibato.naga@pm.me>
Code changes:
1. Expose daemon_poll() so lightningd can call it directly, which avoids us
having store a global and document it.
2. Remove the (undocumented, unused, forgotten) --rpc-file="" option to disable
JSON RPC.
3. Move the ickiness of finding the executable path into subd.c, so it doesn't
distract from lightningd.c overview.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We want to exclude the child from being entered into the htable:
if we wanted the parent we could do this outside the loop.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
memleak can't see into htables, as it overloads unused pointer bits.
And it can't see into intmap, since they use malloc (it only looks for tal
pointers).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
I managed to crash the HSM by asking for point -1 (shachain_index has an
assert). Fail in this case, instead.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
To be safe, we should never memcmp secrets. We don't do this
currently outside tests, but we're about to.
The tests to prove this as constant time are the tricky bit.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Tests were failing when in the same thread after a test which set
log_all_io=True, because SIGUSR1 seemed to be turning logging *off*.
This is due to Python using references not copies for assignment.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is required for the next test, which has to log messages from channeld
as soon as it starts (so might be too late if it sends SIGUSR1).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We ignore incoming for now, but this means we advertize the option and
we send the required fields.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is a wrapper around shachain_get_hash, which converts the
commit_num to an index and returns a 'struct secret' rather than a
'struct sha256' (which is really an internal detail).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell
Christian Decker
Mark Beckwith
arowser
Jon Griffiths
lisa neigut
Saibato