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59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
#ifndef LIGHTNING_WIRE_TLVSTREAM_H
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#define LIGHTNING_WIRE_TLVSTREAM_H
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#include "config.h"
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#include <bitcoin/short_channel_id.h>
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#include <ccan/short_types/short_types.h>
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#include <ccan/tal/tal.h>
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struct tlv_record_type {
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u64 type;
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/* If this type is present return marshalled value. Otherwise
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* returns NULL. */
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u8 *(*towire)(const tal_t *ctx, const void *record);
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/* Must call fromwire_fail() if it can't parse. */
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void (*fromwire)(const u8 **cursor, size_t *max, void *record);
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};
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/* A single TLV field, consisting of the data and its associated metadata. */
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struct tlv_field {
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/* If this is a type that is known to c-lightning we have a pointer to
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* the metadata. */
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const struct tlv_record_type *meta;
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/* In any case we'll have the numeric type, even if we don't have a
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* name that we can call it. */
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u64 numtype;
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size_t length;
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u8 *value;
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};
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/* Given any tlvstream serialize the raw fields (untyped ones). */
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void towire_tlvstream_raw(u8 **pptr, struct tlv_field *fields);
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/* Given a tlv record with manually-set fields, populate ->fields */
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#define tlv_make_fields(tlv, type) \
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tlv_make_fields_(tlvs_##type, TLVS_ARRAY_SIZE_##type, (tlv))
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struct tlv_field *tlv_make_fields_(const struct tlv_record_type *types,
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size_t num_types,
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const void *record);
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/* Generic TLV decode/encode */
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bool fromwire_tlv(const u8 **cursor, size_t *max,
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const struct tlv_record_type *types, size_t num_types,
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void *record, struct tlv_field **fields);
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void towire_tlv(u8 **pptr,
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const struct tlv_record_type *types, size_t num_types,
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const void *record);
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bool tlv_fields_valid(const struct tlv_field *fields, u64 *allow_extra,
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size_t *err_index);
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/* Generic primitive setters for tlvstreams. */
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void tlvstream_set_raw(struct tlv_field **stream, u64 type, void *value TAKES, size_t valuelen);
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void tlvstream_set_short_channel_id(struct tlv_field **stream, u64 type,
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struct short_channel_id *value);
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void tlvstream_set_tu64(struct tlv_field **stream, u64 type, u64 value);
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void tlvstream_set_tu32(struct tlv_field **stream, u64 type, u32 value);
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#endif /* LIGHTNING_WIRE_TLVSTREAM_H */
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