mpls_return_enum ldp_label_request_send(ldp_global * g, ldp_session * s,
ldp_attr * us_attr, ldp_attr ** ds_attr)
{
ldp_attr *ds_temp;
mpls_fec fec;
LDP_ENTER(g->user_data, "ldp_label_request_send");
MPLS_ASSERT(ds_attr && *ds_attr);
fec_tlv2mpls_fec(&((*ds_attr)->fecTlv), 0, &fec);
if ((ds_temp = ldp_attr_find_downstream_state(g, s, &fec,
LDP_LSP_STATE_REQ_SENT)) != NULL) { /* SLRq.1 */
LDP_TRACE_LOG(g->user_data, MPLS_TRACE_STATE_SEND, LDP_TRACE_FLAG_LABEL,
"Label Request Send: request already pending(%d)\n", ds_temp->index);
ldp_attr_add_us2ds(us_attr, ds_temp);
/* we do not need the one passed in, but make sure that the caller
is using this one from here forth */
ldp_attr_remove_complete(g, *ds_attr, MPLS_BOOL_TRUE);
*ds_attr = ds_temp;
return MPLS_SUCCESS;
}
if (s->no_label_resource_recv == MPLS_BOOL_TRUE) { /* SLRq.2 */
goto ldp_label_request_send_error;
}
(*ds_attr)->msg_id = g->message_identifier++;
ldp_label_request_prepare_msg(s->tx_message, (*ds_attr)->msg_id, *ds_attr);
LDP_TRACE_LOG(g->user_data, MPLS_TRACE_STATE_SEND, LDP_TRACE_FLAG_LABEL,
"Label Request Sent: session(%d)\n", s->index);
if (ldp_mesg_send_tcp(g, s, s->tx_message) == MPLS_FAILURE) { /* SLRq.3 */
LDP_TRACE_LOG(g->user_data, MPLS_TRACE_STATE_SEND, LDP_TRACE_FLAG_ERROR,
"Label Request send failed\n");
goto ldp_label_request_send_error;
}
(*ds_attr)->state = LDP_LSP_STATE_REQ_SENT;
if (ldp_attr_insert_downstream(g, s, (*ds_attr)) == MPLS_FAILURE) { /* SLRq.4 */
LDP_TRACE_LOG(g->user_data, MPLS_TRACE_STATE_SEND, LDP_TRACE_FLAG_ERROR,
"Couldn't insert sent attributes in tree\n");
goto ldp_label_request_send_error;
}
if (us_attr) {
ldp_attr_add_us2ds(us_attr, *ds_attr);
}
LDP_EXIT(g->user_data, "ldp_label_request_send");
return MPLS_SUCCESS; /* SLRq.5 */
ldp_label_request_send_error:
LDP_PRINT(g->user_data, "SLRq.6\n");
(*ds_attr)->state = LDP_LSP_STATE_NO_LABEL_RESOURCE_SENT;
ldp_attr_insert_downstream(g, s, (*ds_attr)); /* SLRq.6 */
LDP_EXIT(g->user_data, "ldp_label_request_send-error");
return MPLS_FAILURE; /* SLRq.7 */
}
void ldp_attr_remove_complete(ldp_global * g, ldp_attr * attr,
mpls_bool complete)
{
ldp_session *session = attr->session;
ldp_outlabel *out = NULL;
ldp_inlabel *in = NULL;
ldp_attr *us_temp = NULL;
mpls_fec fec;
int i;
switch (attr->state) {
case LDP_LSP_STATE_MAP_RECV:
if (attr->ingress == MPLS_BOOL_TRUE) {
out = attr->outlabel;
MPLS_ASSERT(out != NULL);
while ((in = MPLS_LIST_HEAD(&out->inlabel_root)) != NULL) {
ldp_inlabel_del_outlabel(g, in);
}
if (out->merge_count > 0) {
for (i = 0; i < attr->fecTlv.numberFecElements; i++) {
fec_tlv2mpls_fec(&attr->fecTlv, i, &fec);
out->merge_count--;
#if MPLS_USE_LSR
{
lsr_ftn ftn;
memcpy(&ftn.fec, &fec, sizeof(mpls_fec));
ftn.outsegment_index = out->info.handle;
lsr_cfg_ftn_set2(g->lsr_handle, &ftn, LSR_CFG_DEL);
}
#else
mpls_mpls_fec2out_del(g->mpls_handle, &fec, &out->info);
#endif
}
}
MPLS_ASSERT(out->merge_count == 0);
ldp_attr_del_outlabel(g, attr);
ldp_session_del_outlabel(g, session, out);
}
while ((us_temp = MPLS_LIST_HEAD(&attr->us_attr_root)) != NULL) {
ldp_attr_del_us2ds(g, us_temp, attr);
}
ldp_attr_delete_downstream(g, session, attr);
break;
case LDP_LSP_STATE_MAP_SENT:
in = attr->inlabel;
out = in->outlabel;
if (in->reuse_count == 1 && out) {
ldp_inlabel_del_outlabel(g, in);
}
ldp_attr_del_inlabel(g, attr);
ldp_attr_delete_upstream(g, session, attr);
ldp_attr_del_us2ds(g, attr, attr->ds_attr);
ldp_session_del_inlabel(g, session, in);
break;
case LDP_LSP_STATE_ABORT_SENT:
case LDP_LSP_STATE_NOTIF_SENT:
case LDP_LSP_STATE_REQ_RECV:
case LDP_LSP_STATE_WITH_SENT:
case LDP_LSP_STATE_NO_LABEL_RESOURCE_SENT:
{
ldp_attr_del_us2ds(g, attr, attr->ds_attr);
ldp_attr_delete_upstream(g, session, attr);
break;
}
case LDP_LSP_STATE_ABORT_RECV:
case LDP_LSP_STATE_NOTIF_RECV:
case LDP_LSP_STATE_REQ_SENT:
case LDP_LSP_STATE_WITH_RECV:
case LDP_LSP_STATE_NO_LABEL_RESOURCE_RECV:
{
while ((us_temp = MPLS_LIST_HEAD(&attr->us_attr_root)) != NULL) {
ldp_attr_del_us2ds(g, us_temp, attr);
}
ldp_attr_delete_downstream(g, session, attr);
break;
}
}
}
