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daemon/sphinx: support modern v0 hop payload.

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This just means we put the outgoing_cltv_value where we used to put zeroes.
The old daemon simply ignores this, but the new one should check it as per
BOLT 4.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2017-04-01 21:28:30 +10:30
parent fed25cc540
commit 8a84e961ed
4 changed files with 27 additions and 9 deletions
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15
daemon/sphinx.c
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@@ -110,8 +110,12 @@ static struct hoppayload *parse_hoppayload(const tal_t *ctx, u8 *src)
struct hoppayload *result = talz(ctx, struct hoppayload);
read_buffer(&result->realm, src, sizeof(result->realm), &p);
read_buffer(&result->amount, src, sizeof(result->amount), &p);
read_buffer(&result->remainder, src, sizeof(result->remainder), &p);
read_buffer(&result->amt_to_forward,
src, sizeof(result->amt_to_forward), &p);
read_buffer(&result->outgoing_cltv_value,
src, sizeof(result->outgoing_cltv_value), &p);
read_buffer(&result->unused_with_v0_version_on_header,
src, sizeof(result->unused_with_v0_version_on_header), &p);
return result;
}
@@ -120,8 +124,11 @@ static void serialize_hoppayload(u8 *dst, struct hoppayload *hp)
int p = 0;
write_buffer(dst, &hp->realm, sizeof(hp->realm), &p);
write_buffer(dst, &hp->amount, sizeof(hp->amount), &p);
write_buffer(dst, &hp->remainder, sizeof(hp->remainder), &p);
write_buffer(dst, &hp->amt_to_forward, sizeof(hp->amt_to_forward), &p);
write_buffer(dst, &hp->outgoing_cltv_value,
sizeof(hp->outgoing_cltv_value), &p);
write_buffer(dst, &hp->unused_with_v0_version_on_header,
sizeof(hp->unused_with_v0_version_on_header), &p);
}