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ospf_ri.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* This is an implementation of RFC4970 Router Information
* with support of RFC5088 PCE Capabilites announcement
*
* Module name: Router Information
* Author: Olivier Dugeon <[email protected]>
* Copyright (C) 2012 - 2017 Orange Labs http://www.orange.com/
*/
#include <zebra.h>
#include <math.h>
#include "linklist.h"
#include "prefix.h"
#include "if.h"
#include "table.h"
#include "memory.h"
#include "command.h"
#include "vty.h"
#include "stream.h"
#include "log.h"
#include "frrevent.h"
#include "hash.h"
#include "sockunion.h" /* for inet_aton() */
#include "mpls.h"
#include <lib/json.h>
#include "ospfd/ospfd.h"
#include "ospfd/ospf_interface.h"
#include "ospfd/ospf_ism.h"
#include "ospfd/ospf_asbr.h"
#include "ospfd/ospf_lsa.h"
#include "ospfd/ospf_lsdb.h"
#include "ospfd/ospf_neighbor.h"
#include "ospfd/ospf_nsm.h"
#include "ospfd/ospf_flood.h"
#include "ospfd/ospf_packet.h"
#include "ospfd/ospf_spf.h"
#include "ospfd/ospf_dump.h"
#include "ospfd/ospf_route.h"
#include "ospfd/ospf_ase.h"
#include "ospfd/ospf_zebra.h"
#include "ospfd/ospf_sr.h"
#include "ospfd/ospf_ri.h"
#include "ospfd/ospf_errors.h"
/*
* Global variable to manage Opaque-LSA/Router Information on this node.
* Note that all parameter values are stored in network byte order.
*/
static struct ospf_router_info OspfRI;
/*------------------------------------------------------------------------------*
* Following are initialize/terminate functions for Router Information
*handling.
*------------------------------------------------------------------------------*/
static void ospf_router_info_ism_change(struct ospf_interface *oi,
int old_status);
static void ospf_router_info_config_write_router(struct vty *vty);
static void ospf_router_info_show_info(struct vty *vty,
struct json_object *json,
struct ospf_lsa *lsa);
static int ospf_router_info_lsa_originate(void *arg);
static struct ospf_lsa *ospf_router_info_lsa_refresh(struct ospf_lsa *lsa);
static void ospf_router_info_lsa_schedule(struct ospf_ri_area_info *ai,
enum lsa_opcode opcode);
static void ospf_router_info_register_vty(void);
static int ospf_router_info_lsa_update(struct ospf_lsa *lsa);
static void del_area_info(void *val);
static void del_pce_info(void *val);
int ospf_router_info_init(void)
{
zlog_info("RI (%s): Initialize Router Information", __func__);
memset(&OspfRI, 0, sizeof(OspfRI));
OspfRI.enabled = false;
OspfRI.registered = 0;
OspfRI.scope = OSPF_OPAQUE_AS_LSA;
OspfRI.as_flags = RIFLG_LSA_INACTIVE;
OspfRI.area_info = list_new();
OspfRI.area_info->del = del_area_info;
/* Initialize pce domain and neighbor list */
OspfRI.pce_info.enabled = false;
OspfRI.pce_info.pce_domain = list_new();
OspfRI.pce_info.pce_domain->del = del_pce_info;
OspfRI.pce_info.pce_neighbor = list_new();
OspfRI.pce_info.pce_neighbor->del = del_pce_info;
/* Initialize Segment Routing information structure */
OspfRI.sr_info.enabled = false;
ospf_router_info_register_vty();
return 0;
}
static int ospf_router_info_register(uint8_t scope)
{
int rc = 0;
if (OspfRI.registered)
return rc;
zlog_info("RI (%s): Register Router Information with scope %s(%d)",
__func__,
scope == OSPF_OPAQUE_AREA_LSA ? "Area" : "AS", scope);
rc = ospf_register_opaque_functab(
scope, OPAQUE_TYPE_ROUTER_INFORMATION_LSA,
NULL, /* new interface */
NULL, /* del interface */
ospf_router_info_ism_change,
NULL, /* NSM change */
ospf_router_info_config_write_router,
NULL, /* Config. write interface */
NULL, /* Config. write debug */
ospf_router_info_show_info, ospf_router_info_lsa_originate,
ospf_router_info_lsa_refresh, ospf_router_info_lsa_update,
NULL); /* del_lsa_hook */
if (rc != 0) {
flog_warn(
EC_OSPF_OPAQUE_REGISTRATION,
"RI (%s): Failed to register functions", __func__);
return rc;
}
OspfRI.registered = 1;
OspfRI.scope = scope;
return rc;
}
static int ospf_router_info_unregister(void)
{
if ((OspfRI.scope != OSPF_OPAQUE_AS_LSA)
&& (OspfRI.scope != OSPF_OPAQUE_AREA_LSA)) {
assert("Unable to unregister Router Info functions: Wrong scope!"
== NULL);
return -1;
}
ospf_delete_opaque_functab(OspfRI.scope,
OPAQUE_TYPE_ROUTER_INFORMATION_LSA);
OspfRI.registered = 0;
return 0;
}
void ospf_router_info_term(void)
{
list_delete(&OspfRI.area_info);
list_delete(&OspfRI.pce_info.pce_domain);
list_delete(&OspfRI.pce_info.pce_neighbor);
OspfRI.enabled = false;
ospf_router_info_unregister();
return;
}
void ospf_router_info_finish(void)
{
struct listnode *node, *nnode;
struct ospf_ri_area_info *ai;
/* Flush Router Info LSA */
for (ALL_LIST_ELEMENTS(OspfRI.area_info, node, nnode, ai))
if (CHECK_FLAG(ai->flags, RIFLG_LSA_ENGAGED))
ospf_router_info_lsa_schedule(ai, FLUSH_THIS_LSA);
list_delete_all_node(OspfRI.pce_info.pce_domain);
list_delete_all_node(OspfRI.pce_info.pce_neighbor);
OspfRI.enabled = false;
}
static void del_area_info(void *val)
{
XFREE(MTYPE_OSPF_ROUTER_INFO, val);
}
static void del_pce_info(void *val)
{
XFREE(MTYPE_OSPF_PCE_PARAMS, val);
}
/* Catch RI LSA flooding Scope for ospf_ext.[h,c] code */
struct scope_info ospf_router_info_get_flooding_scope(void)
{
struct scope_info flooding_scope;
if (OspfRI.scope == OSPF_OPAQUE_AS_LSA) {
flooding_scope.scope = OSPF_OPAQUE_AS_LSA;
flooding_scope.areas = NULL;
return flooding_scope;
}
flooding_scope.scope = OSPF_OPAQUE_AREA_LSA;
flooding_scope.areas = OspfRI.area_info;
return flooding_scope;
}
static struct ospf_ri_area_info *lookup_by_area(struct ospf_area *area)
{
struct listnode *node, *nnode;
struct ospf_ri_area_info *ai;
for (ALL_LIST_ELEMENTS(OspfRI.area_info, node, nnode, ai))
if (ai->area == area)
return ai;
return NULL;
}
/*------------------------------------------------------------------------*
* Following are control functions for ROUTER INFORMATION parameters
*management.
*------------------------------------------------------------------------*/
static void set_router_info_capabilities(struct ri_tlv_router_cap *ric,
uint32_t cap)
{
ric->header.type = htons(RI_TLV_CAPABILITIES);
ric->header.length = htons(RI_TLV_LENGTH);
ric->value = htonl(cap);
return;
}
static int set_pce_header(struct ospf_pce_info *pce)
{
uint16_t length = 0;
struct listnode *node;
struct ri_pce_subtlv_domain *domain;
struct ri_pce_subtlv_neighbor *neighbor;
/* PCE Address */
if (ntohs(pce->pce_address.header.type) != 0)
length += TLV_SIZE(&pce->pce_address.header);
/* PCE Path Scope */
if (ntohs(pce->pce_scope.header.type) != 0)
length += TLV_SIZE(&pce->pce_scope.header);
/* PCE Domain */
for (ALL_LIST_ELEMENTS_RO(pce->pce_domain, node, domain)) {
if (ntohs(domain->header.type) != 0)
length += TLV_SIZE(&domain->header);
}
/* PCE Neighbor */
for (ALL_LIST_ELEMENTS_RO(pce->pce_neighbor, node, neighbor)) {
if (ntohs(neighbor->header.type) != 0)
length += TLV_SIZE(&neighbor->header);
}
/* PCE Capabilities */
if (ntohs(pce->pce_cap_flag.header.type) != 0)
length += TLV_SIZE(&pce->pce_cap_flag.header);
if (length != 0) {
pce->pce_header.header.type = htons(RI_TLV_PCE);
pce->pce_header.header.length = htons(length);
pce->enabled = true;
} else {
pce->pce_header.header.type = 0;
pce->pce_header.header.length = 0;
pce->enabled = false;
}
return length;
}
static void set_pce_address(struct in_addr ipv4, struct ospf_pce_info *pce)
{
/* Enable PCE Info */
pce->pce_header.header.type = htons(RI_TLV_PCE);
/* Set PCE Address */
pce->pce_address.header.type = htons(RI_PCE_SUBTLV_ADDRESS);
pce->pce_address.header.length = htons(PCE_ADDRESS_IPV4_SIZE);
pce->pce_address.address.type = htons(PCE_ADDRESS_IPV4);
pce->pce_address.address.value = ipv4;
return;
}
static void set_pce_path_scope(uint32_t scope, struct ospf_pce_info *pce)
{
/* Set PCE Scope */
pce->pce_scope.header.type = htons(RI_PCE_SUBTLV_PATH_SCOPE);
pce->pce_scope.header.length = htons(RI_TLV_LENGTH);
pce->pce_scope.value = htonl(scope);
return;
}
static void set_pce_domain(uint16_t type, uint32_t domain,
struct ospf_pce_info *pce)
{
struct ri_pce_subtlv_domain *new;
/* Create new domain info */
new = XCALLOC(MTYPE_OSPF_PCE_PARAMS,
sizeof(struct ri_pce_subtlv_domain));
new->header.type = htons(RI_PCE_SUBTLV_DOMAIN);
new->header.length = htons(PCE_ADDRESS_IPV4_SIZE);
new->type = htons(type);
new->value = htonl(domain);
/* Add new domain to the list */
listnode_add(pce->pce_domain, new);
return;
}
static void unset_pce_domain(uint16_t type, uint32_t domain,
struct ospf_pce_info *pce)
{
struct listnode *node;
struct ri_pce_subtlv_domain *old = NULL;
int found = 0;
/* Search the corresponding node */
for (ALL_LIST_ELEMENTS_RO(pce->pce_domain, node, old)) {
if ((old->type == htons(type))
&& (old->value == htonl(domain))) {
found = 1;
break;
}
}
/* if found remove it */
if (found) {
listnode_delete(pce->pce_domain, old);
/* Finally free the old domain */
XFREE(MTYPE_OSPF_PCE_PARAMS, old);
}
}
static void set_pce_neighbor(uint16_t type, uint32_t domain,
struct ospf_pce_info *pce)
{
struct ri_pce_subtlv_neighbor *new;
/* Create new neighbor info */
new = XCALLOC(MTYPE_OSPF_PCE_PARAMS,
sizeof(struct ri_pce_subtlv_neighbor));
new->header.type = htons(RI_PCE_SUBTLV_NEIGHBOR);
new->header.length = htons(PCE_ADDRESS_IPV4_SIZE);
new->type = htons(type);
new->value = htonl(domain);
/* Add new domain to the list */
listnode_add(pce->pce_neighbor, new);
return;
}
static void unset_pce_neighbor(uint16_t type, uint32_t domain,
struct ospf_pce_info *pce)
{
struct listnode *node;
struct ri_pce_subtlv_neighbor *old = NULL;
int found = 0;
/* Search the corresponding node */
for (ALL_LIST_ELEMENTS_RO(pce->pce_neighbor, node, old)) {
if ((old->type == htons(type))
&& (old->value == htonl(domain))) {
found = 1;
break;
}
}
/* if found remove it */
if (found) {
listnode_delete(pce->pce_neighbor, old);
/* Finally free the old domain */
XFREE(MTYPE_OSPF_PCE_PARAMS, old);
}
}
static void set_pce_cap_flag(uint32_t cap, struct ospf_pce_info *pce)
{
/* Set PCE Capabilities flag */
pce->pce_cap_flag.header.type = htons(RI_PCE_SUBTLV_CAP_FLAG);
pce->pce_cap_flag.header.length = htons(RI_TLV_LENGTH);
pce->pce_cap_flag.value = htonl(cap);
return;
}
/* Segment Routing TLV setter */
/* Algorithm SubTLV - section 3.1 */
static void set_sr_algorithm(uint8_t algo)
{
OspfRI.sr_info.algo.value[0] = algo;
for (int i = 1; i < ALGORITHM_COUNT; i++)
OspfRI.sr_info.algo.value[i] = SR_ALGORITHM_UNSET;
/* Set TLV type and length == only 1 Algorithm */
TLV_TYPE(OspfRI.sr_info.algo) = htons(RI_SR_TLV_SR_ALGORITHM);
TLV_LEN(OspfRI.sr_info.algo) = htons(sizeof(uint8_t));
}
/* unset Aglogithm SubTLV */
static void unset_sr_algorithm(uint8_t algo)
{
for (int i = 0; i < ALGORITHM_COUNT; i++)
OspfRI.sr_info.algo.value[i] = SR_ALGORITHM_UNSET;
/* Unset TLV type and length */
TLV_TYPE(OspfRI.sr_info.algo) = htons(0);
TLV_LEN(OspfRI.sr_info.algo) = htons(0);
}
/* Set Segment Routing Global Block SubTLV - section 3.2 */
static void set_sr_global_label_range(struct sr_block srgb)
{
/* Set Header */
TLV_TYPE(OspfRI.sr_info.srgb) = htons(RI_SR_TLV_SRGB_LABEL_RANGE);
TLV_LEN(OspfRI.sr_info.srgb) = htons(RI_SR_TLV_LABEL_RANGE_SIZE);
/* Set Range Size */
OspfRI.sr_info.srgb.size = htonl(SET_RANGE_SIZE(srgb.range_size));
/* Set Lower bound label SubTLV */
TLV_TYPE(OspfRI.sr_info.srgb.lower) = htons(SUBTLV_SID_LABEL);
TLV_LEN(OspfRI.sr_info.srgb.lower) = htons(SID_RANGE_LABEL_LENGTH);
OspfRI.sr_info.srgb.lower.value = htonl(SET_LABEL(srgb.lower_bound));
}
/* Unset Segment Routing Global Block SubTLV */
static void unset_sr_global_label_range(void)
{
TLV_TYPE(OspfRI.sr_info.srgb) = htons(0);
TLV_LEN(OspfRI.sr_info.srgb) = htons(0);
TLV_TYPE(OspfRI.sr_info.srgb.lower) = htons(0);
TLV_LEN(OspfRI.sr_info.srgb.lower) = htons(0);
}
/* Set Segment Routing Local Block SubTLV - section 3.2 */
static void set_sr_local_label_range(struct sr_block srlb)
{
/* Set Header */
TLV_TYPE(OspfRI.sr_info.srlb) = htons(RI_SR_TLV_SRLB_LABEL_RANGE);
TLV_LEN(OspfRI.sr_info.srlb) = htons(RI_SR_TLV_LABEL_RANGE_SIZE);
/* Set Range Size */
OspfRI.sr_info.srlb.size = htonl(SET_RANGE_SIZE(srlb.range_size));
/* Set Lower bound label SubTLV */
TLV_TYPE(OspfRI.sr_info.srlb.lower) = htons(SUBTLV_SID_LABEL);
TLV_LEN(OspfRI.sr_info.srlb.lower) = htons(SID_RANGE_LABEL_LENGTH);
OspfRI.sr_info.srlb.lower.value = htonl(SET_LABEL(srlb.lower_bound));
}
/* Unset Segment Routing Local Block SubTLV */
static void unset_sr_local_label_range(void)
{
TLV_TYPE(OspfRI.sr_info.srlb) = htons(0);
TLV_LEN(OspfRI.sr_info.srlb) = htons(0);
TLV_TYPE(OspfRI.sr_info.srlb.lower) = htons(0);
TLV_LEN(OspfRI.sr_info.srlb.lower) = htons(0);
}
/* Set Maximum Stack Depth for this router */
static void set_sr_node_msd(uint8_t msd)
{
TLV_TYPE(OspfRI.sr_info.msd) = htons(RI_SR_TLV_NODE_MSD);
TLV_LEN(OspfRI.sr_info.msd) = htons(sizeof(uint32_t));
OspfRI.sr_info.msd.value = msd;
}
/* Unset this router MSD */
static void unset_sr_node_msd(void)
{
TLV_TYPE(OspfRI.sr_info.msd) = htons(0);
TLV_LEN(OspfRI.sr_info.msd) = htons(0);
}
static void unset_param(void *tlv_buffer)
{
struct tlv_header *tlv = (struct tlv_header *)tlv_buffer;
tlv->type = 0;
/* Fill the Value to 0 */
memset(TLV_DATA(tlv_buffer), 0, TLV_BODY_SIZE(tlv));
tlv->length = 0;
return;
}
static void initialize_params(struct ospf_router_info *ori)
{
uint32_t cap = 0;
struct ospf *top;
struct listnode *node, *nnode;
struct ospf_area *area;
struct ospf_ri_area_info *new;
/*
* Initialize default Router Information Capabilities.
*/
cap = RI_TE_SUPPORT;
set_router_info_capabilities(&ori->router_cap, cap);
/* If Area address is not null and exist, retrieve corresponding
* structure */
top = ospf_lookup_by_vrf_id(VRF_DEFAULT);
zlog_info("RI (%s): Initialize Router Info for %s scope", __func__,
OspfRI.scope == OSPF_OPAQUE_AREA_LSA ? "Area" : "AS");
/* Try to get available Area's context from ospf at this step.
* Do it latter if not available */
if (OspfRI.scope == OSPF_OPAQUE_AREA_LSA) {
if (!list_isempty(OspfRI.area_info))
list_delete_all_node(OspfRI.area_info);
for (ALL_LIST_ELEMENTS(top->areas, node, nnode, area)) {
zlog_debug("RI (%s): Add area %pI4 to Router Information",
__func__, &area->area_id);
new = XCALLOC(MTYPE_OSPF_ROUTER_INFO,
sizeof(struct ospf_ri_area_info));
new->area = area;
new->flags = RIFLG_LSA_INACTIVE;
listnode_add(OspfRI.area_info, new);
}
}
/*
* Initialize default PCE Information values
*/
/* PCE address == OSPF Router ID */
set_pce_address(top->router_id, &ori->pce_info);
/* PCE scope */
cap = 7; /* Set L, R and Rd bits to one = intra & inter-area path
computation */
set_pce_path_scope(cap, &ori->pce_info);
/* PCE Capabilities */
cap = PCE_CAP_BIDIRECTIONAL | PCE_CAP_DIVERSE_PATH | PCE_CAP_OBJECTIVES
| PCE_CAP_ADDITIVE | PCE_CAP_MULTIPLE_REQ;
set_pce_cap_flag(cap, &ori->pce_info);
return;
}
static int is_mandated_params_set(struct ospf_router_info *ori)
{
int rc = 0;
if (ori == NULL)
return rc;
if (ntohs(ori->router_cap.header.type) == 0)
return rc;
if ((ntohs(ori->pce_info.pce_header.header.type) == RI_TLV_PCE)
&& (ntohs(ori->pce_info.pce_address.header.type) == 0)
&& (ntohs(ori->pce_info.pce_cap_flag.header.type) == 0))
return rc;
if ((ori->sr_info.enabled) && (ntohs(TLV_TYPE(ori->sr_info.algo)) == 0)
&& (ntohs(TLV_TYPE(ori->sr_info.srgb)) == 0))
return rc;
rc = 1;
return rc;
}
/*
* Used by Segment Routing to set new TLVs and Sub-TLVs values
*
* @param enable To activate or not Segment Routing router Information flooding
* @param srn Self Segment Routing node
*
* @return none
*/
void ospf_router_info_update_sr(bool enable, struct sr_node *srn)
{
struct listnode *node, *nnode;
struct ospf_ri_area_info *ai;
/* First, check if Router Information is registered or not */
if (!OspfRI.registered)
ospf_router_info_register(OSPF_OPAQUE_AREA_LSA);
/* Verify that scope is AREA */
if (OspfRI.scope != OSPF_OPAQUE_AREA_LSA) {
zlog_err(
"RI (%s): Router Info is %s flooding: Change scope to Area flooding for Segment Routing",
__func__,
OspfRI.scope == OSPF_OPAQUE_AREA_LSA ? "Area" : "AS");
return;
}
/* Then, activate and initialize Router Information if necessary */
if (!OspfRI.enabled) {
OspfRI.enabled = true;
initialize_params(&OspfRI);
}
/* Check that SR node is valid */
if (srn == NULL)
return;
if (IS_DEBUG_OSPF_SR)
zlog_debug("RI (%s): %s Routing Information for Segment Routing",
__func__, enable ? "Enable" : "Disable");
/* Unset or Set SR parameters */
if (!enable) {
unset_sr_algorithm(SR_ALGORITHM_SPF);
unset_sr_global_label_range();
unset_sr_local_label_range();
unset_sr_node_msd();
OspfRI.sr_info.enabled = false;
} else {
// Only SR_ALGORITHM_SPF is supported
set_sr_algorithm(SR_ALGORITHM_SPF);
set_sr_global_label_range(srn->srgb);
set_sr_local_label_range(srn->srlb);
if (srn->msd != 0)
set_sr_node_msd(srn->msd);
else
unset_sr_node_msd();
OspfRI.sr_info.enabled = true;
}
/* Refresh if already engaged or originate RI LSA */
for (ALL_LIST_ELEMENTS(OspfRI.area_info, node, nnode, ai)) {
if (CHECK_FLAG(ai->flags, RIFLG_LSA_ENGAGED))
ospf_router_info_lsa_schedule(ai, REFRESH_THIS_LSA);
else
ospf_router_info_lsa_schedule(ai,
REORIGINATE_THIS_LSA);
}
}
/*------------------------------------------------------------------------*
* Following are callback functions against generic Opaque-LSAs handling.
*------------------------------------------------------------------------*/
static void ospf_router_info_ism_change(struct ospf_interface *oi,
int old_state)
{
struct ospf_ri_area_info *ai;
/* Collect area information */
ai = lookup_by_area(oi->area);
/* Check if area is not yet registered */
if (ai != NULL)
return;
/* Add this new area to the list */
ai = XCALLOC(MTYPE_OSPF_ROUTER_INFO, sizeof(struct ospf_ri_area_info));
ai->area = oi->area;
ai->flags = RIFLG_LSA_INACTIVE;
listnode_add(OspfRI.area_info, ai);
return;
}
/*------------------------------------------------------------------------*
* Following are OSPF protocol processing functions for ROUTER INFORMATION
*------------------------------------------------------------------------*/
static void build_tlv_header(struct stream *s, struct tlv_header *tlvh)
{
stream_put(s, tlvh, sizeof(struct tlv_header));
return;
}
static void build_tlv(struct stream *s, struct tlv_header *tlvh)
{
if (ntohs(tlvh->type) != 0) {
build_tlv_header(s, tlvh);
stream_put(s, TLV_DATA(tlvh), TLV_BODY_SIZE(tlvh));
}
return;
}
static void ospf_router_info_lsa_body_set(struct stream *s)
{
struct listnode *node;
struct ri_pce_subtlv_domain *domain;
struct ri_pce_subtlv_neighbor *neighbor;
/* Build Router Information TLV */
build_tlv(s, &OspfRI.router_cap.header);
/* Build Segment Routing TLVs if enabled */
if (OspfRI.sr_info.enabled) {
/* Build Algorithm TLV */
build_tlv(s, &TLV_HDR(OspfRI.sr_info.algo));
/* Build SRGB TLV */
build_tlv(s, &TLV_HDR(OspfRI.sr_info.srgb));
/* Build SRLB TLV */
build_tlv(s, &TLV_HDR(OspfRI.sr_info.srlb));
/* Build MSD TLV */
build_tlv(s, &TLV_HDR(OspfRI.sr_info.msd));
}
/* Add RI PCE TLV if it is set */
if (OspfRI.pce_info.enabled) {
/* Compute PCE Info header first */
set_pce_header(&OspfRI.pce_info);
/* Build PCE TLV */
build_tlv_header(s, &OspfRI.pce_info.pce_header.header);
/* Build PCE address sub-tlv */
build_tlv(s, &OspfRI.pce_info.pce_address.header);
/* Build PCE path scope sub-tlv */
build_tlv(s, &OspfRI.pce_info.pce_scope.header);
/* Build PCE domain sub-tlv */
for (ALL_LIST_ELEMENTS_RO(OspfRI.pce_info.pce_domain, node,
domain))
build_tlv(s, &domain->header);
/* Build PCE neighbor sub-tlv */
for (ALL_LIST_ELEMENTS_RO(OspfRI.pce_info.pce_neighbor, node,
neighbor))
build_tlv(s, &neighbor->header);
/* Build PCE cap flag sub-tlv */
build_tlv(s, &OspfRI.pce_info.pce_cap_flag.header);
}
return;
}
/* Create new opaque-LSA. */
static struct ospf_lsa *ospf_router_info_lsa_new(struct ospf_area *area)
{
struct ospf *top;
struct stream *s;
struct lsa_header *lsah;
struct ospf_lsa *new = NULL;
uint8_t options, lsa_type;
struct in_addr lsa_id;
uint32_t tmp;
uint16_t length;
/* Create a stream for LSA. */
s = stream_new(OSPF_MAX_LSA_SIZE);
lsah = (struct lsa_header *)STREAM_DATA(s);
options = OSPF_OPTION_E; /* Enable AS external as we flood RI with
Opaque Type 11 */
options |= OSPF_OPTION_O; /* Don't forget this :-) */
lsa_type = OspfRI.scope;
/* LSA ID == 0 for Router Information see RFC 4970 */
tmp = SET_OPAQUE_LSID(OPAQUE_TYPE_ROUTER_INFORMATION_LSA, 0);
lsa_id.s_addr = htonl(tmp);
if (IS_DEBUG_OSPF(lsa, LSA_GENERATE))
zlog_debug(
"LSA[Type%d:%pI4]: Create an Opaque-LSA/ROUTER INFORMATION instance",
lsa_type, &lsa_id);
top = ospf_lookup_by_vrf_id(VRF_DEFAULT);
/* Set opaque-LSA header fields. */
lsa_header_set(s, options, lsa_type, lsa_id, top->router_id);
/* Set opaque-LSA body fields. */
ospf_router_info_lsa_body_set(s);
/* Set length. */
length = stream_get_endp(s);
lsah->length = htons(length);
/* Now, create an OSPF LSA instance. */
new = ospf_lsa_new_and_data(length);
/* Routing Information is only supported for default VRF */
new->vrf_id = VRF_DEFAULT;
new->area = area;
SET_FLAG(new->flags, OSPF_LSA_SELF);
memcpy(new->data, lsah, length);
stream_free(s);
return new;
}
static int ospf_router_info_lsa_originate_as(void *arg)
{
struct ospf_lsa *new;
struct ospf *top;
int rc = -1;
/* Sanity Check */
if (OspfRI.scope == OSPF_OPAQUE_AREA_LSA) {
flog_warn(
EC_OSPF_LSA_INSTALL_FAILURE,
"RI (%s): wrong flooding scope AREA instead of AS ?",
__func__);
return rc;
}
/* Create new Opaque-LSA/ROUTER INFORMATION instance. */
new = ospf_router_info_lsa_new(NULL);
top = (struct ospf *)arg;
/* Check ospf info */
if (top == NULL) {
zlog_debug("RI (%s): ospf instance not found for vrf id %u",
__func__, VRF_DEFAULT);
ospf_lsa_unlock(&new);
return rc;
}
/* Install this LSA into LSDB. */
if (ospf_lsa_install(top, NULL /*oi */, new) == NULL) {
flog_warn(
EC_OSPF_LSA_INSTALL_FAILURE,
"RI (%s): ospf_lsa_install() ?", __func__);
ospf_lsa_unlock(&new);
return rc;
}
/* Update new LSA origination count. */
top->lsa_originate_count++;
/* Flood new LSA through AREA or AS. */
SET_FLAG(OspfRI.as_flags, RIFLG_LSA_ENGAGED);
ospf_flood_through_as(top, NULL /*nbr */, new);
if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) {
zlog_debug(
"LSA[Type%d:%pI4]: Originate Opaque-LSA/ROUTER INFORMATION",
new->data->type, &new->data->id);
ospf_lsa_header_dump(new->data);
}
rc = 0;
return rc;
}
static int ospf_router_info_lsa_originate_area(void *arg)
{
struct ospf_lsa *new;
struct ospf *top;
struct ospf_ri_area_info *ai = NULL;
int rc = -1;
/* Sanity Check */
if (OspfRI.scope == OSPF_OPAQUE_AS_LSA) {
flog_warn(
EC_OSPF_LSA_INSTALL_FAILURE,
"RI (%s): wrong flooding scope AS instead of AREA ?",
__func__);
return rc;
}
/* Create new Opaque-LSA/ROUTER INFORMATION instance. */
ai = lookup_by_area((struct ospf_area *)arg);
if (ai == NULL) {
zlog_debug(
"RI (%s): There is no context for this Router Information. Stop processing",
__func__);
return rc;
}
if (ai->area->ospf)
top = ai->area->ospf;
else
top = ospf_lookup_by_vrf_id(VRF_DEFAULT);
new = ospf_router_info_lsa_new(ai->area);
/* Check ospf info */
if (top == NULL) {
zlog_debug("RI (%s): ospf instance not found for vrf id %u",
__func__, VRF_DEFAULT);
ospf_lsa_unlock(&new);
return rc;
}
/* Install this LSA into LSDB. */
if (ospf_lsa_install(top, NULL /*oi */, new) == NULL) {
flog_warn(
EC_OSPF_LSA_INSTALL_FAILURE,
"RI (%s): ospf_lsa_install() ?", __func__);
ospf_lsa_unlock(&new);
return rc;
}
/* Update new LSA origination count. */
top->lsa_originate_count++;
/* Flood new LSA through AREA or AS. */
SET_FLAG(ai->flags, RIFLG_LSA_ENGAGED);
ospf_flood_through_area(ai->area, NULL /*nbr */, new);
if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) {
zlog_debug(
"LSA[Type%d:%pI4]: Originate Opaque-LSA/ROUTER INFORMATION",
new->data->type, &new->data->id);
ospf_lsa_header_dump(new->data);
}
rc = 0;
return rc;
}
static int ospf_router_info_lsa_originate(void *arg)
{
struct ospf_ri_area_info *ai;
int rc = -1;
if (!OspfRI.enabled) {
zlog_info("RI (%s): ROUTER INFORMATION is disabled now.",
__func__);
rc = 0; /* This is not an error case. */
return rc;
}
/* Check if Router Information LSA is already engaged */
if (OspfRI.scope == OSPF_OPAQUE_AS_LSA) {
if ((CHECK_FLAG(OspfRI.as_flags, RIFLG_LSA_ENGAGED))
&& (CHECK_FLAG(OspfRI.as_flags,
RIFLG_LSA_FORCED_REFRESH))) {
UNSET_FLAG(OspfRI.as_flags, RIFLG_LSA_FORCED_REFRESH);
ospf_router_info_lsa_schedule(NULL, REFRESH_THIS_LSA);
rc = 0;
return rc;
}
} else {
ai = lookup_by_area((struct ospf_area *)arg);
if (ai == NULL) {
flog_warn(
EC_OSPF_LSA,
"RI (%s): Missing area information", __func__);
return rc;
}
if ((CHECK_FLAG(ai->flags, RIFLG_LSA_ENGAGED))
&& (CHECK_FLAG(ai->flags, RIFLG_LSA_FORCED_REFRESH))) {
UNSET_FLAG(ai->flags, RIFLG_LSA_FORCED_REFRESH);
ospf_router_info_lsa_schedule(ai, REFRESH_THIS_LSA);
rc = 0;
return rc;
}
}
/* Router Information is not yet Engaged, check parameters */
if (!is_mandated_params_set(&OspfRI))
flog_warn(
EC_OSPF_LSA,
"RI (%s): lacks mandated ROUTER INFORMATION parameters",
__func__);
/* Ok, let's try to originate an LSA */
if (OspfRI.scope == OSPF_OPAQUE_AS_LSA)
rc = ospf_router_info_lsa_originate_as(arg);
else
rc = ospf_router_info_lsa_originate_area(arg);
return rc;
}
static struct ospf_lsa *ospf_router_info_lsa_refresh(struct ospf_lsa *lsa)
{
struct ospf_ri_area_info *ai = NULL;
struct ospf_lsa *new = NULL;
struct ospf *top;
if (!OspfRI.enabled) {
/*
* This LSA must have flushed before due to ROUTER INFORMATION
* status change.