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channeld: send option_data_loss_protect fields.

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We ignore incoming for now, but this means we advertize the option and
we send the required fields.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2018-08-17 13:46:34 +09:30
committed by Christian Decker
parent 61c6b8b25a
commit ebaf5eaf2e
6 changed files with 51 additions and 8 deletions
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25
lightningd/channel_control.c
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@@ -188,6 +188,7 @@ void peer_start_channeld(struct channel *channel,
struct lightningd *ld = channel->peer->ld;
const struct config *cfg = &ld->config;
bool reached_announce_depth;
struct secret last_remote_per_commit_secret;
hsmfd = hsm_get_client_fd(ld, &channel->peer->id,
channel->dbid,
@@ -235,6 +236,27 @@ void peer_start_channeld(struct channel *channel,
num_revocations = revocations_received(&channel->their_shachain.chain);
/* BOLT #2:
*
* - if it supports `option_data_loss_protect`:
* - if `next_remote_revocation_number` equals 0:
* - MUST set `your_last_per_commitment_secret` to all zeroes
* - otherwise:
* - MUST set `your_last_per_commitment_secret` to the last
* `per_commitment_secret` it received
*/
if (num_revocations == 0)
memset(&last_remote_per_commit_secret, 0,
sizeof(last_remote_per_commit_secret));
else if (!shachain_get_secret(&channel->their_shachain.chain,
num_revocations-1,
&last_remote_per_commit_secret)) {
channel_fail_permanent(channel,
"Could not get revocation secret %"PRIu64,
num_revocations-1);
return;
}
/* Warn once. */
if (ld->config.ignore_fee_limits)
log_debug(channel->log, "Ignoring fee limits!");
@@ -284,7 +306,8 @@ void peer_start_channeld(struct channel *channel,
channel->final_key_idx),
channel->channel_flags,
funding_signed,
reached_announce_depth);
reached_announce_depth,
&last_remote_per_commit_secret);
/* We don't expect a response: we are triggered by funding_depth_cb. */
subd_send_msg(channel->owner, take(initmsg));