core-lightning/common/onionreply.c
Rusty Russell c92e782e22 wire: add fromwire_tal_arrn() helper.
Does the allocation and copying; this is useful because we can
avoid being fooled into doing giant allocations.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2020-03-09 16:04:56 +01:00

41 lines
1.0 KiB
C

#include <ccan/cast/cast.h>
#include <common/onionreply.h>
#include <wire/wire.h>
void towire_onionreply(u8 **cursor, const struct onionreply *r)
{
towire_u16(cursor, tal_count(r->contents));
towire_u8_array(cursor, r->contents, tal_count(r->contents));
}
struct onionreply *fromwire_onionreply(const tal_t *ctx,
const u8 **cursor, size_t *max)
{
struct onionreply *r = tal(ctx, struct onionreply);
r->contents = fromwire_tal_arrn(r, cursor, max,
fromwire_u16(cursor, max));
if (!*cursor)
return tal_free(r);
return r;
}
struct onionreply *dup_onionreply(const tal_t *ctx,
const struct onionreply *r TAKES)
{
struct onionreply *n;
if (taken(r))
return cast_const(struct onionreply *, tal_steal(ctx, r));
n = tal(ctx, struct onionreply);
n->contents = tal_dup_talarr(n, u8, r->contents);
return n;
}
struct onionreply *new_onionreply(const tal_t *ctx, const u8 *contents TAKES)
{
struct onionreply *r = tal(ctx, struct onionreply);
r->contents = tal_dup_talarr(r, u8, contents);
return r;
}