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lightningd: --dev-onion-reply-length option.

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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2022-11-08 11:41:44 +10:30 • committed by Christian Decker
parent 341d73fdc2
commit 75c382fe16
3 changed files with 17 additions and 2 deletions
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11
common/sphinx.c
View file

@ -679,12 +679,19 @@ struct route_step *process_onionpacket(
return step;
}
#if DEVELOPER
unsigned dev_onion_reply_length = ONION_REPLY_SIZE;
#define OUR_ONION_REPLY_SIZE dev_onion_reply_length
#else
#define OUR_ONION_REPLY_SIZE ONION_REPLY_SIZE
#endif
struct onionreply *create_onionreply(const tal_t *ctx,
const struct secret *shared_secret,
const u8 *failure_msg)
{
size_t msglen = tal_count(failure_msg);
size_t padlen = ONION_REPLY_SIZE - msglen;
size_t padlen = OUR_ONION_REPLY_SIZE - msglen;
struct onionreply *reply = tal(ctx, struct onionreply);
u8 *payload = tal_arr(ctx, u8, 0);
struct secret key;
@ -716,7 +723,7 @@ struct onionreply *create_onionreply(const tal_t *ctx,
* - Note: this value is 118 bytes longer than the longest
* currently-defined message.
*/
assert(tal_count(payload) == ONION_REPLY_SIZE + 4);
assert(tal_count(payload) == OUR_ONION_REPLY_SIZE + 4);
/* BOLT #4:
*

3
common/sphinx.h
View file

@ -267,6 +267,9 @@ sphinx_compressed_onion_deserialize(const tal_t *ctx, const u8 *src);
#if DEVELOPER
/* Override to force us to reject valid onion packets */
extern bool dev_fail_process_onionpacket;
/* Override to set custom onion error lengths. */
extern unsigned dev_onion_reply_length;
#endif
#endif /* LIGHTNING_COMMON_SPHINX_H */

5
lightningd/options.c
View file

@ -752,6 +752,11 @@ static void dev_register_opts(struct lightningd *ld)
opt_register_noarg("--dev-no-ping-timer", opt_set_bool,
&ld->dev_no_ping_timer,
"Don't hang up if we don't get a ping response");
opt_register_arg("--dev-onion-reply-length",
opt_set_uintval,
opt_show_uintval,
&dev_onion_reply_length,
"Send onion errors of custom length");
}
#endif /* DEVELOPER */