Function sctp_asconf_process_error

freebsd/netinet/sctp_asconf.c:1562–1607

* process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do * notifications based on the error response */

 * notifications based on the error response
 */
static void
sctp_asconf_process_error(struct sctp_tcb *stcb SCTP_UNUSED,
    struct sctp_asconf_paramhdr *aph)
{
	struct sctp_error_cause *eh;
	struct sctp_paramhdr *ph;
	uint16_t param_type;
	uint16_t error_code;

	eh = (struct sctp_error_cause *)(aph + 1);
	ph = (struct sctp_paramhdr *)(eh + 1);
	/* validate lengths */
	if (htons(eh->length) + sizeof(struct sctp_error_cause) >
	    htons(aph->ph.param_length)) {
		/* invalid error cause length */
		SCTPDBG(SCTP_DEBUG_ASCONF1,
		    "asconf_process_error: cause element too long\n");
		return;
	}
	if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) >
	    htons(eh->length)) {
		/* invalid included TLV length */
		SCTPDBG(SCTP_DEBUG_ASCONF1,
		    "asconf_process_error: included TLV too long\n");
		return;
	}
	/* which error code ? */
	error_code = ntohs(eh->code);
	param_type = ntohs(aph->ph.param_type);
	/* FIX: this should go back up the REMOTE_ERROR ULP notify */
	switch (error_code) {
	case SCTP_CAUSE_RESOURCE_SHORTAGE:
		/* we allow ourselves to "try again" for this error */
		break;
	default:
		/* peer can't handle it... */
		switch (param_type) {
		case SCTP_ADD_IP_ADDRESS:
		case SCTP_DEL_IP_ADDRESS:
		case SCTP_SET_PRIM_ADDR:
			break;
		default:
			break;
		}
	}
}

/*
 * process an asconf queue param.