sctp_disposition_t sctp_sf_do_ecne(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)
{
	sctp_ecnehdr_t *ecne;
	struct sctp_chunk *chunk = arg;

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

	if (!sctp_chunk_length_valid(chunk, sizeof(sctp_ecne_chunk_t)))
		return sctp_sf_violation_chunklen(net, ep, asoc, type, arg,
						  commands);

	ecne = (sctp_ecnehdr_t *) chunk->skb->data;
	skb_pull(chunk->skb, sizeof(sctp_ecnehdr_t));

	/* If this is a newer ECNE than the last CWR packet we sent out */
	sctp_add_cmd_sf(commands, SCTP_CMD_ECN_ECNE,
			SCTP_U32(ntohl(ecne->lowest_tsn)));

	return SCTP_DISPOSITION_CONSUME;
}

Unknown