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spring_adjsid.c
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/*
* =====================================================================================
*
* Filename: spring_adjsid.c
*
* Description: This file implements the APIs required for Adjacency SIDs functionality
*
* Version: 1.0
* Created: Wednesday 19 September 2018 11:01:29 IST
* Revision: 1.0
* Compiler: gcc
*
* Author: Er. Abhishek Sagar, Networking Developer (AS), sachinites@gmail.com
* Company: Brocade Communications(Jul 2012- Mar 2016), Current : Juniper Networks(Apr 2017 - Present)
*
* This file is part of the SPFComputation distribution (https://github.com/sachinites).
* Copyright (c) 2017 Abhishek Sagar.
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* =====================================================================================
*/
#include <stdio.h>
#include <stdlib.h>
#include "spring_adjsid.h"
#include "spfcmdcodes.h"
#include "instance.h"
#include "spfutil.h"
#include "LinuxMemoryManager/uapi_mm.h"
void
print_lan_adj_sid_info(edge_end_t *interface,
lan_intf_adj_sid_t *lan_intf_adj_sid){
printf("Interface %s : LAN Adj sid : %u, type = %s, Nbr Sys id : %s\n",
interface->intf_name,
lan_intf_adj_sid->sid.sid,
lan_intf_adj_sid->adj_sid_type == ADJ_SID_TYPE_INDEX ? "INDEX" : "LABEL",
lan_intf_adj_sid->nbr_system_id);
printf("\t");
PRINT_ADJ_SID_FLAGS(lan_intf_adj_sid->flags);
printf("\n");
}
void
print_p2p_adj_sid_info(edge_end_t *interface,
p2p_intf_adj_sid_t *p2p_intf_adj_sid){
printf("Interface %s : PTP Adj sid : %u, type = %s\n",
interface->intf_name,
p2p_intf_adj_sid->sid.sid,
p2p_intf_adj_sid->adj_sid_type == ADJ_SID_TYPE_INDEX ? "INDEX" : "LABEL");
printf("\t");
PRINT_ADJ_SID_FLAGS(p2p_intf_adj_sid->flags);
printf("\n");
}
mpls_label_t
get_p2p_adj_sid_label(edge_end_t *interface,
ADJ_SID_PROTECTION_TYPE asf,
LEVEL level){
p2p_intf_adj_sid_t *p2p_intf_adj_sid = NULL;
p2p_intf_adj_sid = &interface->cfg_p2p_adj_sid_db[level][asf];
if(!p2p_intf_adj_sid) return 0;
return p2p_intf_adj_sid->sid.sid;
}
void
unset_adj_sid(node_t *node, char *intf_name, LEVEL level, unsigned int label){
}
boolean
is_lan_static_adj_sid_exist(glthread_t *lan_adj_sid_list, unsigned int label){
glthread_t *curr = NULL;
ITERATE_GLTHREAD_BEGIN(lan_adj_sid_list, curr){
lan_intf_adj_sid_t *lan_intf_adj_sid = glthread_to_cfg_lan_adj_sid(curr);
if(lan_intf_adj_sid->sid.sid == label)
return TRUE;
} ITERATE_GLTHREAD_END(lan_adj_sid_list, curr);
return FALSE;
}
boolean
is_static_adj_sid_exist_on_interface(edge_end_t *interface, mpls_label_t label){
/*Check on P2P config first*/
ADJ_SID_PROTECTION_TYPE asf;
LEVEL level_it;
for(asf = PROTECTED_ADJ_SID; asf < ADJ_SID_PROTECTION_MAX; asf++){
for(level_it = LEVEL1; level_it < MAX_LEVEL; level_it++){
if(interface->cfg_p2p_adj_sid_db[level_it][asf].sid.sid == label)
return TRUE;
}
}
/*Check for LAN config next*/
for(asf = PROTECTED_ADJ_SID; asf < ADJ_SID_PROTECTION_MAX; asf++){
for(level_it = LEVEL1; level_it < MAX_LEVEL; level_it++){
if(is_lan_static_adj_sid_exist(&interface->cfg_lan_adj_sid_db[level_it][asf], label))
return TRUE;
}
}
return FALSE;
}
boolean
is_static_adj_sid_in_use(node_t *node, mpls_label_t label){
unsigned int i = 0;
edge_end_t *interface = NULL;
for( ; i < MAX_NODE_INTF_SLOTS; i++){
interface = node->edges[i];
if(!interface) return FALSE;
if(is_static_adj_sid_exist_on_interface(interface, label))
return TRUE;
}
return FALSE;
}
void
set_adj_sid(node_t *node, char *intf_name, LEVEL level,
mpls_label_t label, char *nbr_sys_id, int cmdcode){
glthread_t *head = NULL;
p2p_intf_adj_sid_t *adj_sid_entry = NULL;
if(is_static_adj_sid_in_use(node, label)){
printf("Adj sid already in Use, configuration checkout failed\n");
return;
}
edge_end_t *interface = get_interface_from_intf_name(node, intf_name);
if(!interface){
printf("Interface %s on node %s do not exist, config checkout failed\n", intf_name, node->node_name);
return;
}
switch(cmdcode){
case CMDCODE_CONFIG_NODE_INTF_LAN_ADJ_SID_PROTECTED:
head = &interface->cfg_lan_adj_sid_db[level][PROTECTED_ADJ_SID];
break;
case CMDCODE_CONFIG_NODE_INTF_LAN_ADJ_SID_UNPROTECTED:
head = &interface->cfg_lan_adj_sid_db[level][UNPROTECTED_ADJ_SID];
break;
case CMDCODE_CONFIG_NODE_INTF_P2P_ADJ_SID_PROTECTED:
adj_sid_entry = &interface->cfg_p2p_adj_sid_db[level][PROTECTED_ADJ_SID];
break;
case CMDCODE_CONFIG_NODE_INTF_P2P_ADJ_SID_UNPROTECTED:
adj_sid_entry = &interface->cfg_p2p_adj_sid_db[level][UNPROTECTED_ADJ_SID];
break;
default:
assert(0);
}
if(head){
lan_intf_adj_sid_t *lan_intf_adj_sid = XCALLOC(1, lan_intf_adj_sid_t);
lan_intf_adj_sid->adj_sid_type = ADJ_SID_TYPE_LABEL; /*We support only labels*/
lan_intf_adj_sid->sid.sid = label;
strncpy(lan_intf_adj_sid->nbr_system_id, nbr_sys_id, PREFIX_LEN);
lan_intf_adj_sid->nbr_system_id[PREFIX_LEN] = '\0';
SET_STATIC_ADJ_SID_DEFAULT_FLAG(lan_intf_adj_sid->flags);
if(cmdcode == CMDCODE_CONFIG_NODE_INTF_LAN_ADJ_SID_PROTECTED)
SET_BIT(lan_intf_adj_sid->flags, ADJ_SID_BACKUP_B_FLAG);
init_glthread(&lan_intf_adj_sid->cfg_glthread);
glthread_add_next(head, &lan_intf_adj_sid->cfg_glthread);
}else{
adj_sid_entry->adj_sid_type = ADJ_SID_TYPE_LABEL;
adj_sid_entry->sid.sid = label;
SET_STATIC_ADJ_SID_DEFAULT_FLAG(adj_sid_entry->flags);
if(cmdcode == CMDCODE_CONFIG_NODE_INTF_P2P_ADJ_SID_PROTECTED)
SET_BIT(adj_sid_entry->flags, ADJ_SID_BACKUP_B_FLAG);
}
}
void
show_node_adj_sids(node_t *node){
LEVEL level_it;
unsigned int i = 0;
edge_end_t *interface = NULL;
ADJ_SID_PROTECTION_TYPE prot_type;
p2p_intf_adj_sid_t *p2p_intf_adj_sid = NULL;
glthread_t *lan_adj_sid_list = NULL, *curr = NULL;
lan_intf_adj_sid_t *lan_intf_adj_sid = NULL;
for (; i < MAX_NODE_INTF_SLOTS; i++){
interface = node->edges[i];
if(!interface) break;
for(level_it = LEVEL1; level_it < MAX_LEVEL; level_it++){
for(prot_type = PROTECTED_ADJ_SID; prot_type < ADJ_SID_PROTECTION_MAX; prot_type++){
p2p_intf_adj_sid = &interface->cfg_p2p_adj_sid_db[level_it][prot_type];
if(!p2p_intf_adj_sid->sid.sid)
continue;
print_p2p_adj_sid_info(interface, p2p_intf_adj_sid);
}
}
for(level_it = LEVEL1; level_it < MAX_LEVEL; level_it++){
for(prot_type = PROTECTED_ADJ_SID; prot_type < ADJ_SID_PROTECTION_MAX; prot_type++){
lan_adj_sid_list = &interface->cfg_lan_adj_sid_db[level_it][prot_type];
ITERATE_GLTHREAD_BEGIN(lan_adj_sid_list, curr){
lan_intf_adj_sid = glthread_to_cfg_lan_adj_sid(curr);
print_lan_adj_sid_info(interface, lan_intf_adj_sid);
}ITERATE_GLTHREAD_END(lan_adj_sid_list, curr);
}
}
}
}
mpls_label_t
get_adj_sid_minimum(node_t *node1, node_t *node2, LEVEL level){
/*Let us first search a P2P adj sid*/
int i = 0;
edge_end_t *interface;
edge_t *edge = NULL;
unsigned int metric = 0xFFFFFFFF;
p2p_intf_adj_sid_t *p2p_intf_adj_sid = NULL;
for(; i < MAX_NODE_INTF_SLOTS; i++){
interface = node1->edges[i];
if(!interface) break;
edge = GET_EGDE_PTR_FROM_FROM_EDGE_END(interface);
if(get_edge_direction(node1, edge) != OUTGOING) continue;
if(is_broadcast_link(edge, level)) continue;
if(!IS_LEVEL_SET(GET_EDGE_END_LEVEL(interface), level)) continue;
if(!edge->status) continue;
if(edge->to.node != node2) continue;
if(metric > edge->metric[level]){
if(!&interface->cfg_p2p_adj_sid_db[level][UNPROTECTED_ADJ_SID]) continue;
p2p_intf_adj_sid = &interface->cfg_p2p_adj_sid_db[level][UNPROTECTED_ADJ_SID];
metric = edge->metric[level];
}
}
return p2p_intf_adj_sid ?
(p2p_intf_adj_sid->sid.sid != 0 &&
p2p_intf_adj_sid->sid.sid != NO_TAG) ? \
p2p_intf_adj_sid->sid.sid : NO_TAG : NO_TAG;
}