Callers were supposed to call "tlv_fields_valid" after fromwire_tlv,
but few did. Make this the default, and call the underlying function
directly where we want to be more flexible (one place).
This loses the ability to allow misordered fields, or to pass through
*any* even fields. We restore that for special cases in the next
patch.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Requiring the caller to allocate them is ugly, and differs from
other types.
This means we need a context arg if we don't have one already.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
There's a lot of it, and it means we can't `make check-source` on
these files.
Also bring bolt quotes up-to-date.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
has_len_fields() doesn't cover our blacklist of variable types, so if
we have an array of them, this logic is wrong. This happens in the
the bolt13 patch:
```C
struct tlv_offer_tlvs_blindedpath {
struct pubkey blinding;
struct onionmsg_path **path;
};
```
Before:
wire/gen_bolt13_tlv.c:
```C
for (size_t i = 0; i < tal_count(r->blindedpath->path); i++)
towire_onionmsg_path(&ptr, r->blindedpath->path + i);
```
After:
```C
for (size_t i = 0; i < tal_count(r->blindedpath->path); i++)
towire_onionmsg_path(&ptr, r->blindedpath->path[i]);
```
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
When we have only a single member in a TLV (e.g. an optional u64),
wrapping it in a struct is awkward. This changes it to directly
access those fields.
This is not only more elegant (60 fewer lines), it would also be
more cache friendly. That's right: cache hot singles!
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We cannot let users use `sendcustommsg` to inject messages that are handled
internally since it could result in our internal state tracking being borked.
Since the parser itself just parses and doesn't include validation anymore we
need to put that functionality somewhere. The validation consists of enforcing
that the types are in monotonically increasing order without duplicates and
that for the even types we know how to handle it.
We were weaving in and out of generic code through `fromwire_tlvs` with custom
parameters defining the types in that namespace. This hard-wires the parser
with the namespace's types. Slowly trying to deprecate `fromwire_tlvs` in
favor of this typesafe variant.
Our TLV serializer relies on TLV outputs to be ordered by type
number. Prior to this commit we relied on 1) the ordering in the
RFC to be correct and 2) users to be using a version of Python that
respects stable ordering of dicts (i.e. Python 3.7+)
Instead of relying on these implicitly, we now explicitly sort messages
by type number when the TLV sets.
Resolves#2956.
Thanks-To: @ScottTre for the sort function
Reported-By: @ZmnSCPxj
TLVs have an implicit `len` field, so allow expressions containing
that (eg. `len-1`), but assume it means "the remainder of the
message".
This means in most places, f.size() needs an fallback for the
implicit-length case.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
remove extra space from the lead-in for inline comments
so that a provided comment like this
# This is a comment
will appear like this
/* This is a comment */
if there are any comments that aren't "attached" to a message,
print them at the top of the generated file. we need this for
the fancy auto-gen'd dependencies in the tool-wiregen tests.
the RFC's extract-format.py is switching to a new format.
this script can correctly parse them.
mostly moves logic over from generate-wire.py, uses a
Python formatting libarary called mako, which needs to be
installed prior to running this script.
you can add it to your system with
sudo apt-get install python3-mako
