mpls_return_enum ldp_label_rel_with_send(ldp_global * g, ldp_session * s,
ldp_attr * a, ldp_notif_status status, uint16_t type)
{
LDP_ENTER(g->user_data, "ldp_label_rel_with_send");
ldp_label_rel_with_prepare_msg(s->tx_message, g->message_identifier++, a,
status, type);
ldp_mesg_send_tcp(g, s, s->tx_message);
LDP_EXIT(g->user_data, "ldp_label_rel_with_send");
return MPLS_SUCCESS;
}
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 */
}
mpls_return_enum ldp_label_mapping_send(ldp_global * g, ldp_session * s,
ldp_fec *f, ldp_attr * us_attr, ldp_attr * ds_attr)
{
ldp_inlabel *in = NULL;
ldp_attr *us_temp, *existing = NULL;
LDP_ENTER(g->user_data, "ldp_label_mapping_send");
MPLS_ASSERT(us_attr);
#if 0
/*
* before we can enable this, inlabels need to keep track of all of
* the attr that link to it. Then when running in DU independent mode we
* can correctly attach the us and ds attrs involved when propogating a
* new mapping for a FEC we've already distributed labels for
*/
existing = ldp_attr_find_upstream_map_in_labelspace(f, s->cfg_label_space);
#endif
if (existing) {
LDP_TRACE_LOG(g->user_data, MPLS_TRACE_STATE_ALL, LDP_TRACE_FLAG_BINDING,
"Using an existing label\n");
in = existing->inlabel;
ldp_attr_add_inlabel(us_attr, in);
} else {
LDP_TRACE_LOG(g->user_data, MPLS_TRACE_STATE_ALL, LDP_TRACE_FLAG_BINDING,
"Generating a label\n");
in = ldp_inlabel_create_complete(g, s, us_attr);
}
if (!in) { /* SL.1-3 */
goto Send_Label_9;
}
LDP_TRACE_LOG(g->user_data, MPLS_TRACE_STATE_ALL, LDP_TRACE_FLAG_BINDING,
"In Label Added\n");
us_attr->state = LDP_LSP_STATE_MAP_SENT;
us_attr->msg_id = g->message_identifier;
ldp_label_mapping_prepare_msg(s->tx_message, g->message_identifier++,
us_attr);
if (ldp_mesg_send_tcp(g, s, s->tx_message) != MPLS_SUCCESS) { /* SL.4 */
LDP_TRACE_LOG(g->user_data, MPLS_TRACE_STATE_SEND, LDP_TRACE_FLAG_ERROR,
"Failed sending Label Mapping to %s\n",
s->session_name);
goto ldp_label_mapping_send_error;
}
LDP_TRACE_LOG(g->user_data, MPLS_TRACE_STATE_SEND, LDP_TRACE_FLAG_LABEL,
"Label Mapping Sent to %s for %08x/%d\n",
s->session_name,
us_attr->fecTlv.fecElArray[0].addressEl.address,
us_attr->fecTlv.fecElArray[0].addressEl.preLen);
us_attr->state = LDP_LSP_STATE_MAP_SENT; /* SL.6,7 */
LDP_EXIT(g->user_data, "ldp_label_mapping_send");
return MPLS_SUCCESS; /* SL.8 */
Send_Label_9:
LDP_TRACE_LOG(g->user_data, MPLS_TRACE_STATE_ALL, LDP_TRACE_FLAG_STATE,
"No Label Resources\n");
while ((us_temp = ldp_attr_find_upstream_state2(g, s, us_attr->fec,
LDP_LSP_STATE_REQ_RECV)) != NULL) { /* SL.9 */
ldp_notif_send(g, s, us_temp, LDP_NOTIF_NO_LABEL_RESOURCES_AVAILABLE);
/* SL.10 */
s->no_label_resource_sent = MPLS_BOOL_TRUE; /* SL.12 */
us_temp->state = LDP_LSP_STATE_NO_LABEL_RESOURCE_SENT; /* SL.13 */
}
LDP_EXIT(g->user_data, "ldp_label_mapping_send");
return MPLS_SUCCESS;
ldp_label_mapping_send_error:
LDP_EXIT(g->user_data, "ldp_label_mapping_send-error");
return MPLS_FAILURE;
}
