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tlv: Add raw fields so we can store unknown fields as well

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Christian Decker 2019-11-18 15:53:27 +01:00 committed by Rusty Russell
parent 162cea265c
commit 2255024ead
3 changed files with 23 additions and 1 deletions
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5
tools/gen/header_template
View File

@ -53,6 +53,11 @@ struct ${struct.struct_name()} {
## Structs for TLVs
% for tlv in tlvs.values():
struct ${tlv.struct_name()} {
/* Raw fields including unknown ones. */
struct tlv_field *fields;
/* TODO The following explicit fields could just point into the
* tlv_field entries above to save on memory. */
% for msg in tlv.messages.values():
struct ${msg.struct_name()} *${msg.name};
% endfor

6
tools/gen/impl_template
View File

@ -157,7 +157,11 @@ fromwire_${type_}(${'ctx, ' if f.needs_context() else ''}&cursor, &plen, ${'*' i
${tlv.type_name()} *${tlv.struct_name()}_new(const tal_t *ctx)
{
/* Initialize everything to NULL. (Quiet, C pedants!) */
return talz(ctx, struct ${tlv.struct_name()});
${tlv.type_name()} *inst = talz(ctx, struct ${tlv.struct_name()});
/* Initialized the fields to an empty array. */
inst->fields = tal_arr(inst, struct tlv_field, 0);
return inst;
}
% for msg in tlv.messages.values():

13
wire/tlvstream.h
View File

@ -15,6 +15,19 @@ struct tlv_record_type {
void (*fromwire)(const u8 **cursor, size_t *max, void *record);
};
/* A single TLV field, consisting of the data and its associated metadata. */
struct tlv_field {
/* If this is a type that is known to c-lightning we have a pointer to
* the metadata. */
const struct tlv_record_type *meta;
/* In any case we'll have the numeric type, even if we don't have a
* name that we can call it. */
u64 numtype;
size_t length;
u8 *value;
};
/* Pull all tlvs from a stream. Return false and calls fromwire_fail() on
* error. */
bool fromwire_tlvs(const u8 **cursor, size_t *max,