Function sctp_notify_send_failed2

freebsd/netinet/sctputil.c:3501–3595

}

static void
sctp_notify_send_failed2(struct sctp_tcb *stcb, uint32_t error,
    struct sctp_stream_queue_pending *sp, int so_locked)
{
	struct mbuf *m_notify;
	struct sctp_send_failed *ssf;
	struct sctp_send_failed_event *ssfe;
	struct sctp_queued_to_read *control;
	int notifhdr_len;

	if ((stcb == NULL) ||
	    (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSENDFAILEVNT) &&
	    sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT))) {
		/* event not enabled */
		return;
	}
	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
		notifhdr_len = sizeof(struct sctp_send_failed_event);
	} else {
		notifhdr_len = sizeof(struct sctp_send_failed);
	}
	m_notify = sctp_get_mbuf_for_msg(notifhdr_len, 0, M_NOWAIT, 1, MT_DATA);
	if (m_notify == NULL) {
		/* no space left */
		return;
	}
	SCTP_BUF_LEN(m_notify) = notifhdr_len;
	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
		ssfe = mtod(m_notify, struct sctp_send_failed_event *);
		memset(ssfe, 0, notifhdr_len);
		ssfe->ssfe_type = SCTP_SEND_FAILED_EVENT;
		ssfe->ssfe_flags = SCTP_DATA_UNSENT;
		ssfe->ssfe_length = (uint32_t)(notifhdr_len + sp->length);
		ssfe->ssfe_error = error;
		/* not exactly what the user sent in, but should be close :) */
		ssfe->ssfe_info.snd_sid = sp->sid;
		if (sp->some_taken) {
			ssfe->ssfe_info.snd_flags = SCTP_DATA_LAST_FRAG;
		} else {
			ssfe->ssfe_info.snd_flags = SCTP_DATA_NOT_FRAG;
		}
		ssfe->ssfe_info.snd_ppid = sp->ppid;
		ssfe->ssfe_info.snd_context = sp->context;
		ssfe->ssfe_info.snd_assoc_id = sctp_get_associd(stcb);
		ssfe->ssfe_assoc_id = sctp_get_associd(stcb);
	} else {
		ssf = mtod(m_notify, struct sctp_send_failed *);
		memset(ssf, 0, notifhdr_len);
		ssf->ssf_type = SCTP_SEND_FAILED;
		ssf->ssf_flags = SCTP_DATA_UNSENT;
		ssf->ssf_length = (uint32_t)(notifhdr_len + sp->length);
		ssf->ssf_error = error;
		/* not exactly what the user sent in, but should be close :) */
		ssf->ssf_info.sinfo_stream = sp->sid;
		ssf->ssf_info.sinfo_ssn = 0;
		if (sp->some_taken) {
			ssf->ssf_info.sinfo_flags = SCTP_DATA_LAST_FRAG;
		} else {