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htlc_wire: rename malformed to failcode in struct failed_htlc.

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I'm not completely convinced that it's only ever set to a failcode
with the BADONION bit set, especially after the previous patches in
this series.  Now that channeld can handle arbitrary failcodes passed
this way, simply rename it.

We add marshalling assertions that only one of failcode and failreason
is set, and we unmarshal an empty 'fail' to NULL (just the the
generated unmarshalling code does).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2018-07-02 14:00:22 +09:30 committed by Christian Decker
parent 5a184c24e8
commit 68a8eeea21
5 changed files with 20 additions and 12 deletions
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2
channeld/channel.c
View File

@ -1214,7 +1214,7 @@ static u8 *got_commitsig_msg(const tal_t *ctx,
f = tal_arr_append(&failed);
*f = tal(failed, struct failed_htlc);
(*f)->id = htlc->id;
(*f)->malformed = htlc->failcode;
(*f)->failcode = htlc->failcode;
(*f)->failreason = cast_const(u8 *, htlc->fail);
}
} else {

7
channeld/full_channel.c
View File

@ -1048,13 +1048,14 @@ bool channel_force_htlcs(struct channel *channel,
htlc_state_name(htlc->state));
return false;
}
if (failed[i]->malformed)
htlc->failcode = failed[i]->malformed;
else
htlc->failcode = failed[i]->failcode;
if (failed[i]->failreason)
htlc->fail = tal_dup_arr(htlc, u8,
failed[i]->failreason,
tal_len(failed[i]->failreason),
0);
else
htlc->fail = NULL;
}
for (i = 0; i < tal_count(htlcs); i++) {

12
common/htlc_wire.c
View File

@ -25,8 +25,11 @@ void towire_fulfilled_htlc(u8 **pptr, const struct fulfilled_htlc *fulfilled)
void towire_failed_htlc(u8 **pptr, const struct failed_htlc *failed)
{
/* Only one can be set. */
assert(failed->failcode || tal_len(failed->failreason));
assert(!failed->failcode || !tal_len(failed->failreason));
towire_u64(pptr, failed->id);
towire_u16(pptr, failed->malformed);
towire_u16(pptr, failed->failcode);
towire_u16(pptr, tal_count(failed->failreason));
towire_u8_array(pptr, failed->failreason, tal_count(failed->failreason));
}
@ -84,9 +87,12 @@ struct failed_htlc *fromwire_failed_htlc(const tal_t *ctx, const u8 **cursor, si
struct failed_htlc *failed = tal(ctx, struct failed_htlc);
failed->id = fromwire_u64(cursor, max);
failed->malformed = fromwire_u16(cursor, max);
failed->failcode = fromwire_u16(cursor, max);
failreason_len = fromwire_u16(cursor, max);
failed->failreason = tal_arr(failed, u8, failreason_len);
if (failreason_len)
failed->failreason = tal_arr(failed, u8, failreason_len);
else
failed->failreason = NULL;
fromwire_u8_array(cursor, max, failed->failreason, failreason_len);
return failed;

3
common/htlc_wire.h
View File

@ -26,7 +26,8 @@ struct fulfilled_htlc {
struct failed_htlc {
u64 id;
enum onion_type malformed;
/* Either this is 0 and failreason non-NULL, or vice versa. */
enum onion_type failcode;
u8 *failreason;
};

8
lightningd/peer_htlcs.c
View File

@ -771,8 +771,8 @@ static bool peer_failed_our_htlc(struct channel *channel,
if (!htlc_out_update_state(channel, hout, RCVD_REMOVE_COMMIT))
return false;
hout->failcode = failed->malformed;
if (!failed->malformed)
hout->failcode = failed->failcode;
if (!failed->failcode)
hout->failuremsg = tal_dup_arr(hout, u8, failed->failreason,
tal_len(failed->failreason), 0);
@ -1384,7 +1384,7 @@ static void add_fulfill(u64 id, enum side side,
}
static void add_fail(u64 id, enum side side,
enum onion_type malformed,
enum onion_type failcode,
const u8 *failuremsg,
const struct failed_htlc ***failed_htlcs,
enum side **failed_sides)
@ -1397,7 +1397,7 @@ static void add_fail(u64 id, enum side side,
*f = tal(*failed_htlcs, struct failed_htlc);
(*f)->id = id;
(*f)->malformed = malformed;
(*f)->failcode = failcode;
if (failuremsg)
(*f)->failreason
= tal_dup_arr(*f, u8, failuremsg, tal_len(failuremsg), 0);