TLV's use var_int's for messages sizes, both internally and
in the top level (you should really stack a var_int inside a var_int!!)
this updates our automagick generator code to understand 'var_ints'
passing back a null TLV was crashing here, because we tried to
dereference a null pointer. instead, we put it into a temporary
struct that we can check for NULL-ness, before assigning to the
passed in pointer.
let's let the fromwire__tlv methods allocate the tlv-objects and
return them. we also want to initialize all of their underlying
messages to NULL, and fail if we discover a duplicate mesage type.
if parsing fails, instead of returning a struct we return NULL.
Suggested-By: @rustyrussell
Since messages in TLV's are optional, the ideal way to deal with
them is to have a 'master struct' object for every defined tlv, where
the presence or lack of a field can be determined via the presence
(or lack thereof) of a struct for each of the optional message
types.
In order to do this, appropriately, we need a struct for every
TLV message. The next commit will make use of these.
Note that right now TLV message structs aren't namespaced to the
TLV they belong to, so there's the potential for collision. This
should be fixed when/where it occurs (should fail to compile).
Add tlv-messages to the general messages set so that their parsing
messages get printed out.
FIXME: figure out how to account for partial message length processing?
Version 1.1 of the lightning-rfc spec introduces TLVs for optional
data fields. This starts the process of updating our auto-gen'd
wireformat parsers to be able to understand TLV fields.
The general way to declare a new TLV field is to add a '+' to the
end of the fieldname. All field type declarations for that TLV set
should be added to a file in the same directory by the name
`gen_<field_name>_csv`.
Note that the FIXME included in this commit is difficult to fix, as
we currently pass in the csv files via stdin (so there's no easy
way to ascertain the originating directory of file)
Otherwise we can't really return a variable sized message with more than 65k
results. This was causing an integer overflow in `listchannels` (see #2504 for
details).
Signed-off-by: Christian Decker <decker.christian@gmail.com>
Basically we tell it that every field ending in '_msat' is a struct
amount_msat, and 'satoshis' is an amount_sat. The exceptions are
channel_update's fee_base_msat which is a u32, and
final_incorrect_htlc_amount's incoming_htlc_amt which is also a
'struct amount_msat'.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
They're generally used pass-by-copy (unusual for C structs, but
convenient they're basically u64) and all possibly problematic
operations return WARN_UNUSED_RESULT bool to make you handle the
over/underflow cases.
The new #include in json.h means we bolt11.c sees the amount.h definition
of MSAT_PER_BTC, so delete its local version.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
If we have an array of varlen structures (which require a ctx arg), we
should make that arg the array itself (which was tal_arr()), not the
root context.
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>
This requires a tweak to generate-wire.py too, since it always called the
top-level routine 'print_message'.
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>
Well, it's generated by shachain, so technically it is a sha256, but
that's an internal detail. It's a secret.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We already work around this by using an array with a 0/1 length convention,
but better to be explicit.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We always hand in "NULL" (which means use tal_len on the msg), except
for two places which do that manually for no good reason.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
A convenient alias for char *, though we don't allow control characters
so our logs can't be fooled with embedded \n.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
These are now logically arrays of pointers. This is much more natural,
and gets rid of the horrible utxo array converters.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
The close_info is needed to re-derive the secret key that is supposed
to be used to sign the input spending the output.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
lisa neigut
Christian Decker
Rusty Russell
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