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gossip: Implement handler for enabling and disabling channels

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Signed-off-by: Christian Decker <decker.christian@gmail.com>
This commit is contained in:
Christian Decker 2018-01-23 22:14:53 +01:00 committed by Rusty Russell
parent c6ae4b521f
commit 007c349dec
1 changed files with 79 additions and 0 deletions
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79
gossipd/gossip.c
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@ -1772,6 +1772,85 @@ static struct io_plan *handle_txout_reply(struct io_conn *conn,
static struct io_plan *handle_disable_channel(struct io_conn *conn,
struct daemon *daemon, u8 *msg)
{
tal_t *tmpctx = tal_tmpctx(msg);
struct short_channel_id scid;
u8 direction;
struct node_connection *nc;
bool active;
u16 flags, cltv_expiry_delta;
u32 timestamp, fee_base_msat, fee_proportional_millionths;
struct bitcoin_blkid chain_hash;
secp256k1_ecdsa_signature sig;
u64 htlc_minimum_msat;
if (!fromwire_gossip_disable_channel(msg, NULL, &scid, &direction, &active) ) {
status_trace("Unable to parse %s",
gossip_wire_type_name(fromwire_peektype(msg)));
goto fail;
}
nc = get_connection_by_scid(daemon->rstate, &scid, direction);
if (!nc) {
status_trace(
"Unable to find channel %s/%d",
type_to_string(msg, struct short_channel_id, &scid),
direction);
goto fail;
}
status_trace("Disabling channel %s/%d, active %d -> %d",
type_to_string(msg, struct short_channel_id, &scid),
direction, nc->active, active);
nc->active = active;
if (!nc->channel_update) {
status_trace(
"Channel %s/%d doesn't have a channel_update yet, can't "
"disable",
type_to_string(msg, struct short_channel_id, &scid),
direction);
goto fail;
}
if (!fromwire_channel_update(
nc->channel_update, NULL, &sig, &chain_hash, &scid, &timestamp,
&flags, &cltv_expiry_delta, &htlc_minimum_msat, &fee_base_msat,
&fee_proportional_millionths)) {
status_failed(
STATUS_FAIL_INTERNAL_ERROR,
"Unable to parse previously accepted channel_update");
}
timestamp = time_now().ts.tv_sec;
if (timestamp <= nc->last_timestamp)
timestamp = nc->last_timestamp + 1;
/* Active is bit 1 << 1, mask and apply */
flags = (0xFFFD & flags) | (!active << 1);
msg = towire_channel_update(tmpctx, &sig, &chain_hash, &scid, timestamp,
flags, cltv_expiry_delta, htlc_minimum_msat,
fee_base_msat, fee_proportional_millionths);
if (!wire_sync_write(HSM_FD,
towire_hsm_cupdate_sig_req(tmpctx, msg))) {
status_failed(STATUS_FAIL_HSM_IO, "Writing cupdate_sig_req: %s",
strerror(errno));
}
msg = wire_sync_read(tmpctx, HSM_FD);
if (!msg || !fromwire_hsm_cupdate_sig_reply(tmpctx, msg, NULL, &msg)) {
status_failed(STATUS_FAIL_HSM_IO,
"Reading cupdate_sig_req: %s",
strerror(errno));
}
handle_channel_update(daemon->rstate, msg);
fail:
tal_free(tmpctx);
return daemon_conn_read_next(conn, &daemon->master);
}