sctp_disposition_t sctp_sf_cookie_wait_abort(struct net *net,
				     const struct sctp_endpoint *ep,
				     const struct sctp_association *asoc,
				     const sctp_subtype_t type,
				     void *arg,
				     sctp_cmd_seq_t *commands)
{
	struct sctp_chunk *chunk = arg;
	unsigned int len;
	__be16 error = SCTP_ERROR_NO_ERROR;

	if (!sctp_vtag_verify_either(chunk, asoc))
		return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);

	/* Make sure that the ABORT chunk has a valid length.
	 * Since this is an ABORT chunk, we have to discard it
	 * because of the following text:
	 * RFC 2960, Section 3.3.7
	 *    If an endpoint receives an ABORT with a format error or for an
	 *    association that doesn't exist, it MUST silently discard it.
	 * Because the length is "invalid", we can't really discard just
	 * as we do not know its true length.  So, to be safe, discard the
	 * packet.
	 */
	if (!sctp_chunk_length_valid(chunk, sizeof(sctp_abort_chunk_t)))
		return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);

	/* See if we have an error cause code in the chunk.  */
	len = ntohs(chunk->chunk_hdr->length);
	if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_errhdr))
		error = ((sctp_errhdr_t *)chunk->skb->data)->cause;

	return sctp_stop_t1_and_abort(net, commands, error, ECONNREFUSED, asoc,
				      chunk->transport);
}

Unknown