Function pass_client_hsmfd

hsmd/hsmd.c:519–547

~ This is used by the master to create a new client connection (which * becomes the HSM_FD for the subdaemon after forking). */

/*~ This is used by the master to create a new client connection (which
 * becomes the HSM_FD for the subdaemon after forking). */
static struct io_plan *pass_client_hsmfd(struct io_conn *conn,
					 struct client *c,
					 const u8 *msg_in)
{
	int fds[2];
	u64 dbid, capabilities;
	struct node_id id;

	/* This must be lightningd itself. */
	assert(is_lightningd(c));

	if (!fromwire_hsmd_client_hsmfd(msg_in, &id, &dbid, &capabilities))
		return bad_req(conn, c, msg_in);

	/* socketpair is a bi-directional pipe, which is what we want. */
	if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) != 0)
		status_failed(STATUS_FAIL_INTERNAL_ERROR, "creating fds: %s",
			      strerror(errno));

	status_debug("new_client: %"PRIu64, dbid);
	new_client(c, c->chainparams, &id, dbid, capabilities, fds[0]);

	/*~ We stash this in a global, because we need to get both the fd and
	 * the client pointer to the callback.  The other way would be to
	 * create a boutique structure and hand that, but we don't need to. */
	pending_client_fd = fds[1];
	return io_write_wire(conn, take(towire_hsmd_client_hsmfd_reply(NULL)),
			     send_pending_client_fd, c);
}

#if DEVELOPER
static struct io_plan *handle_memleak(struct io_conn *conn,