Function sanitize_error

common/wire_error.c:118–163

}

char *sanitize_error(const tal_t *ctx, const u8 *errmsg,
		     struct channel_id *channel_id)
{
	struct channel_id dummy;
	u8 *data;
	size_t i;
	const char *tag;

	if (!channel_id)
		channel_id = &dummy;

	if (fromwire_error(ctx, errmsg, channel_id, &data))
		tag = "ERROR";
	else if (fromwire_warning(ctx, errmsg, channel_id, &data))
		tag = "WARNING";
	else if (fromwire_tx_abort(ctx, errmsg, channel_id, &data))
		tag = "ABORT";
	else
		return tal_fmt(ctx, "Invalid ERROR message '%s'",
			       tal_hex(ctx, errmsg));

	/* BOLT #1:
	 *
	 * The receiving node:
	 *...
	 *  - if `data` is not composed solely of printable ASCII characters
	 *   (For reference: the printable character set includes byte values 32
	 *   through 126, inclusive):
	 *    - SHOULD NOT print out `data` verbatim.
	 */
	for (i = 0; i < tal_count(data); i++) {
		if (data[i] < 32 || data[i] > 127) {
			/* Convert to hex, minus NUL term */
			data = (u8 *)tal_hex(ctx, data);
			tal_resize(&data, strlen((const char *)data));
			break;
		}
	}

	return tal_fmt(ctx, "%s%s%s: %.*s",
		       tag,
		       channel_id_is_all(channel_id) ? "": " channel ",
		       channel_id_is_all(channel_id) ? ""
		       : fmt_channel_id(tmpctx, channel_id),
		       (int)tal_count(data), (char *)data);
}

const char *is_peer_warning(const tal_t *ctx, const u8 *msg)
{