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lightningd: hand HSM fd to channeld.

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For the moment, it's just to do ECDH to read the onion.

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 8146b838e8
commit a815500653
1 changed files with 66 additions and 40 deletions
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64
lightningd/peer_control.c
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@ -657,6 +657,38 @@ static int channel_msg(struct subd *sd, const u8 *msg, const int *unused)
return 0;
}
struct channeld_start {
struct peer *peer;
const u8 *initmsg;
};
/* We've got fd from HSM for channeld */
static bool peer_start_channeld_hsmfd(struct subd *hsm, const u8 *resp,
const int *fds,
struct channeld_start *cds)
{
cds->peer->owner = new_subd(cds->peer->ld, cds->peer->ld,
"lightningd_channel", cds->peer,
channel_wire_type_name,
channel_msg, NULL,
cds->peer->fd,
cds->peer->gossip_client_fd, fds[0], -1);
if (!cds->peer->owner) {
log_unusual(cds->peer->log, "Could not subdaemon channel: %s",
strerror(errno));
peer_set_condition(cds->peer, "Failed to subdaemon channel");
tal_free(cds->peer);
return true;
}
cds->peer->fd = -1;
peer_set_condition(cds->peer, "Waiting for funding confirmations");
/* We don't expect a response: we are triggered by funding_depth_cb. */
subd_send_msg(cds->peer->owner, take(cds->initmsg));
tal_free(cds);
return true;
}
/* opening is done, start lightningd_channel for peer. */
static void peer_start_channeld(struct peer *peer, bool am_funder,
const struct channel_config *their_config,
@ -666,25 +698,17 @@ static void peer_start_channeld(struct peer *peer, bool am_funder,
const struct basepoints *theirbase,
const struct pubkey *their_per_commit_point)
{
u8 *msg;
struct channeld_start *cds = tal(peer, struct channeld_start);
/* Normal channel daemon. */
peer->owner = new_subd(peer->ld, peer->ld,
"lightningd_channel", peer,
channel_wire_type_name,
channel_msg, NULL,
peer->fd, peer->gossip_client_fd, -1);
if (!peer->owner) {
log_unusual(peer->log, "Could not subdaemon channel: %s",
strerror(errno));
peer_set_condition(peer, "Failed to subdaemon channel");
tal_free(peer);
return;
}
peer->fd = -1;
/* Unowned: back to being owned by main daemon. */
peer->owner = NULL;
tal_steal(peer->ld, peer);
peer_set_condition(peer, "Waiting for funding confirmations");
msg = towire_channel_init(peer,
peer_set_condition(peer, "Waiting for HSM file descriptor");
cds->peer = peer;
/* Prepare init message now while we have access to all the data. */
cds->initmsg = towire_channel_init(cds,
peer->funding_txid,
peer->funding_outnum,
&peer->our_config,
@ -707,8 +731,10 @@ static void peer_start_channeld(struct peer *peer, bool am_funder,
time_to_msec(peer->ld->dstate.config
.commit_time));
/* We don't expect a response: we are triggered by funding_depth_cb. */
subd_send_msg(peer->owner, take(msg));
/* Get fd from hsm. */
subd_req(peer->ld->hsm,
take(towire_hsmctl_hsmfd_ecdh(peer, peer->unique_id)), -1, 1,
peer_start_channeld_hsmfd, cds);
}
static bool opening_release_tx(struct subd *opening, const u8 *resp,