diff options
Diffstat (limited to 'ospfd/ospf_ri.c')
| -rw-r--r-- | ospfd/ospf_ri.c | 2123 |
1 files changed, 2123 insertions, 0 deletions
diff --git a/ospfd/ospf_ri.c b/ospfd/ospf_ri.c new file mode 100644 index 0000000..725443f --- /dev/null +++ b/ospfd/ospf_ri.c @@ -0,0 +1,2123 @@ +// 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 <olivier.dugeon@orange.com> + * 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 "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.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. + * It seems a slip among routers in the routing domain. + */ + zlog_info("RI (%s): ROUTER INFORMATION is disabled now.", + __func__); + lsa->data->ls_age = + htons(OSPF_LSA_MAXAGE); /* Flush it anyway. */ + } + + /* Verify that the Router Information ID is supported */ + if (GET_OPAQUE_ID(ntohl(lsa->data->id.s_addr)) != 0) { + flog_warn( + EC_OSPF_LSA, + "RI (%s): Unsupported Router Information ID", + __func__); + return NULL; + } + + /* Process LSA depending of the flooding scope */ + if (OspfRI.scope == OSPF_OPAQUE_AREA_LSA) { + /* Get context AREA context */ + ai = lookup_by_area(lsa->area); + if (ai == NULL) { + flog_warn( + EC_OSPF_LSA, + "RI (%s): No associated Area", __func__); + return NULL; + } + /* Flush LSA, if the lsa's age reached to MaxAge. */ + if (IS_LSA_MAXAGE(lsa)) { + UNSET_FLAG(ai->flags, RIFLG_LSA_ENGAGED); + ospf_opaque_lsa_flush_schedule(lsa); + return NULL; + } + /* Create new Opaque-LSA/ROUTER INFORMATION instance. */ + new = ospf_router_info_lsa_new(ai->area); + new->data->ls_seqnum = lsa_seqnum_increment(lsa); + /* Install this LSA into LSDB. */ + /* Given "lsa" will be freed in the next function. */ + top = ospf_lookup_by_vrf_id(VRF_DEFAULT); + 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 new; + } + /* Flood updated LSA through AREA */ + ospf_flood_through_area(ai->area, NULL /*nbr */, new); + + } else { /* AS Flooding scope */ + /* Flush LSA, if the lsa's age reached to MaxAge. */ + if (IS_LSA_MAXAGE(lsa)) { + UNSET_FLAG(OspfRI.as_flags, RIFLG_LSA_ENGAGED); + ospf_opaque_lsa_flush_schedule(lsa); + return NULL; + } + /* Create new Opaque-LSA/ROUTER INFORMATION instance. */ + new = ospf_router_info_lsa_new(NULL); + new->data->ls_seqnum = lsa_seqnum_increment(lsa); + /* Install this LSA into LSDB. */ + /* Given "lsa" will be freed in the next function. */ + top = ospf_lookup_by_vrf_id(VRF_DEFAULT); + 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 new; + } + /* Flood updated LSA through AS */ + ospf_flood_through_as(top, NULL /*nbr */, new); + } + + /* Debug logging. */ + if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { + zlog_debug( + "LSA[Type%d:%pI4]: Refresh Opaque-LSA/ROUTER INFORMATION", + new->data->type, &new->data->id); + ospf_lsa_header_dump(new->data); + } + + return new; +} + +static void ospf_router_info_lsa_schedule(struct ospf_ri_area_info *ai, + enum lsa_opcode opcode) +{ + struct ospf_lsa lsa; + struct lsa_header lsah; + struct ospf *top; + uint32_t tmp; + + memset(&lsa, 0, sizeof(lsa)); + memset(&lsah, 0, sizeof(lsah)); + + zlog_debug("RI (%s): LSA schedule %s%s%s", __func__, + opcode == REORIGINATE_THIS_LSA ? "Re-Originate" : "", + opcode == REFRESH_THIS_LSA ? "Refresh" : "", + opcode == FLUSH_THIS_LSA ? "Flush" : ""); + + /* Check LSA flags state coherence and collect area information */ + if (OspfRI.scope == OSPF_OPAQUE_AREA_LSA) { + if ((ai == NULL) || (ai->area == NULL)) { + flog_warn( + EC_OSPF_LSA, + "RI (%s): Router Info is Area scope flooding but area is not set", + __func__); + return; + } + + if (!CHECK_FLAG(ai->flags, RIFLG_LSA_ENGAGED) + && (opcode != REORIGINATE_THIS_LSA)) + return; + + if (CHECK_FLAG(ai->flags, RIFLG_LSA_ENGAGED) + && (opcode == REORIGINATE_THIS_LSA)) + opcode = REFRESH_THIS_LSA; + + lsa.area = ai->area; + top = ai->area->ospf; + } else { + if (!CHECK_FLAG(OspfRI.as_flags, RIFLG_LSA_ENGAGED) + && (opcode != REORIGINATE_THIS_LSA)) + return; + + if (CHECK_FLAG(OspfRI.as_flags, RIFLG_LSA_ENGAGED) + && (opcode == REORIGINATE_THIS_LSA)) + opcode = REFRESH_THIS_LSA; + + top = ospf_lookup_by_vrf_id(VRF_DEFAULT); + lsa.area = NULL; + } + + lsa.data = &lsah; + lsah.type = OspfRI.scope; + + /* LSA ID is set to 0 for the Router Information. See RFC 4970 */ + tmp = SET_OPAQUE_LSID(OPAQUE_TYPE_ROUTER_INFORMATION_LSA, 0); + lsah.id.s_addr = htonl(tmp); + + switch (opcode) { + case REORIGINATE_THIS_LSA: + if (OspfRI.scope == OSPF_OPAQUE_AREA_LSA) + ospf_opaque_lsa_reoriginate_schedule( + (void *)ai->area, OSPF_OPAQUE_AREA_LSA, + OPAQUE_TYPE_ROUTER_INFORMATION_LSA); + else + ospf_opaque_lsa_reoriginate_schedule( + (void *)top, OSPF_OPAQUE_AS_LSA, + OPAQUE_TYPE_ROUTER_INFORMATION_LSA); + break; + case REFRESH_THIS_LSA: + ospf_opaque_lsa_refresh_schedule(&lsa); + break; + case FLUSH_THIS_LSA: + if (OspfRI.scope == OSPF_OPAQUE_AREA_LSA) + UNSET_FLAG(ai->flags, RIFLG_LSA_ENGAGED); + else + UNSET_FLAG(OspfRI.as_flags, RIFLG_LSA_ENGAGED); + ospf_opaque_lsa_flush_schedule(&lsa); + break; + } + + return; +} + +/* Callback to handle Segment Routing information */ +static int ospf_router_info_lsa_update(struct ospf_lsa *lsa) +{ + + /* Sanity Check */ + if (lsa == NULL) { + flog_warn(EC_OSPF_LSA, "RI (%s): Abort! LSA is NULL", + __func__); + return -1; + } + + /* Process only Opaque LSA */ + if ((lsa->data->type != OSPF_OPAQUE_AREA_LSA) + && (lsa->data->type != OSPF_OPAQUE_AS_LSA)) + return 0; + + /* Process only Router Information LSA */ + if (GET_OPAQUE_TYPE(ntohl(lsa->data->id.s_addr)) + != OPAQUE_TYPE_ROUTER_INFORMATION_LSA) + return 0; + + /* Check if it is not my LSA */ + if (IS_LSA_SELF(lsa)) + return 0; + + /* Check if Router Info & Segment Routing are enable */ + if (!OspfRI.enabled || !OspfRI.sr_info.enabled) + return 0; + + /* Call Segment Routing LSA update or deletion */ + if (!IS_LSA_MAXAGE(lsa)) + ospf_sr_ri_lsa_update(lsa); + else + ospf_sr_ri_lsa_delete(lsa); + + return 0; +} + +/*------------------------------------------------------------------------* + * Following are vty session control functions. + *------------------------------------------------------------------------*/ + +#define check_tlv_size(size, msg) \ + do { \ + if (ntohs(tlvh->length) > size) { \ + if (vty != NULL) \ + vty_out(vty, " Wrong %s TLV size: %d(%d)\n", \ + msg, ntohs(tlvh->length), size); \ + else \ + zlog_debug(" Wrong %s TLV size: %d(%d)", \ + msg, ntohs(tlvh->length), size); \ + return size + TLV_HDR_SIZE; \ + } \ + } while (0) + +static uint16_t show_vty_router_cap(struct vty *vty, struct tlv_header *tlvh) +{ + struct ri_tlv_router_cap *top = (struct ri_tlv_router_cap *)tlvh; + + check_tlv_size(RI_TLV_CAPABILITIES_SIZE, "Router Capabilities"); + + if (vty != NULL) + vty_out(vty, " Router Capabilities: 0x%x\n", + ntohl(top->value)); + else + zlog_debug(" Router Capabilities: 0x%x", ntohl(top->value)); + + return TLV_SIZE(tlvh); +} + +static uint16_t show_vty_pce_subtlv_address(struct vty *vty, + struct tlv_header *tlvh) +{ + struct ri_pce_subtlv_address *top = + (struct ri_pce_subtlv_address *)tlvh; + + if (ntohs(top->address.type) == PCE_ADDRESS_IPV4) { + check_tlv_size(PCE_ADDRESS_IPV4_SIZE, "PCE Address"); + if (vty != NULL) + vty_out(vty, " PCE Address: %pI4\n", + &top->address.value); + else + zlog_debug(" PCE Address: %pI4", + &top->address.value); + } else if (ntohs(top->address.type) == PCE_ADDRESS_IPV6) { + /* TODO: Add support to IPv6 with inet_ntop() */ + check_tlv_size(PCE_ADDRESS_IPV6_SIZE, "PCE Address"); + if (vty != NULL) + vty_out(vty, " PCE Address: 0x%x\n", + ntohl(top->address.value.s_addr)); + else + zlog_debug(" PCE Address: 0x%x", + ntohl(top->address.value.s_addr)); + } else { + if (vty != NULL) + vty_out(vty, " Wrong PCE Address type: 0x%x\n", + ntohl(top->address.type)); + else + zlog_debug(" Wrong PCE Address type: 0x%x", + ntohl(top->address.type)); + } + + return TLV_SIZE(tlvh); +} + +static uint16_t show_vty_pce_subtlv_path_scope(struct vty *vty, + struct tlv_header *tlvh) +{ + struct ri_pce_subtlv_path_scope *top = + (struct ri_pce_subtlv_path_scope *)tlvh; + + check_tlv_size(RI_PCE_SUBTLV_PATH_SCOPE_SIZE, "PCE Path Scope"); + + if (vty != NULL) + vty_out(vty, " PCE Path Scope: 0x%x\n", ntohl(top->value)); + else + zlog_debug(" PCE Path Scope: 0x%x", ntohl(top->value)); + + return TLV_SIZE(tlvh); +} + +static uint16_t show_vty_pce_subtlv_domain(struct vty *vty, + struct tlv_header *tlvh) +{ + struct ri_pce_subtlv_domain *top = (struct ri_pce_subtlv_domain *)tlvh; + struct in_addr tmp; + + check_tlv_size(RI_PCE_SUBTLV_DOMAIN_SIZE, "PCE Domain"); + + if (ntohs(top->type) == PCE_DOMAIN_TYPE_AREA) { + tmp.s_addr = top->value; + if (vty != NULL) + vty_out(vty, " PCE Domain Area: %pI4\n", &tmp); + else + zlog_debug(" PCE Domain Area: %pI4", &tmp); + } else if (ntohs(top->type) == PCE_DOMAIN_TYPE_AS) { + if (vty != NULL) + vty_out(vty, " PCE Domain AS: %d\n", + ntohl(top->value)); + else + zlog_debug(" PCE Domain AS: %d", ntohl(top->value)); + } else { + if (vty != NULL) + vty_out(vty, " Wrong PCE Domain type: %d\n", + ntohl(top->type)); + else + zlog_debug(" Wrong PCE Domain type: %d", + ntohl(top->type)); + } + + return TLV_SIZE(tlvh); +} + +static uint16_t show_vty_pce_subtlv_neighbor(struct vty *vty, + struct tlv_header *tlvh) +{ + + struct ri_pce_subtlv_neighbor *top = + (struct ri_pce_subtlv_neighbor *)tlvh; + struct in_addr tmp; + + check_tlv_size(RI_PCE_SUBTLV_NEIGHBOR_SIZE, "PCE Neighbor"); + + if (ntohs(top->type) == PCE_DOMAIN_TYPE_AREA) { + tmp.s_addr = top->value; + if (vty != NULL) + vty_out(vty, " PCE Neighbor Area: %pI4\n", &tmp); + else + zlog_debug(" PCE Neighbor Area: %pI4", &tmp); + } else if (ntohs(top->type) == PCE_DOMAIN_TYPE_AS) { + if (vty != NULL) + vty_out(vty, " PCE Neighbor AS: %d\n", + ntohl(top->value)); + else + zlog_debug(" PCE Neighbor AS: %d", + ntohl(top->value)); + } else { + if (vty != NULL) + vty_out(vty, " Wrong PCE Neighbor type: %d\n", + ntohl(top->type)); + else + zlog_debug(" Wrong PCE Neighbor type: %d", + ntohl(top->type)); + } + + return TLV_SIZE(tlvh); +} + +static uint16_t show_vty_pce_subtlv_cap_flag(struct vty *vty, + struct tlv_header *tlvh) +{ + struct ri_pce_subtlv_cap_flag *top = + (struct ri_pce_subtlv_cap_flag *)tlvh; + + check_tlv_size(RI_PCE_SUBTLV_CAP_FLAG_SIZE, "PCE Capabilities"); + + if (vty != NULL) + vty_out(vty, " PCE Capabilities Flag: 0x%x\n", + ntohl(top->value)); + else + zlog_debug(" PCE Capabilities Flag: 0x%x", + ntohl(top->value)); + + return TLV_SIZE(tlvh); +} + +static uint16_t show_vty_unknown_tlv(struct vty *vty, struct tlv_header *tlvh, + size_t buf_size) +{ + if (TLV_SIZE(tlvh) > buf_size) { + if (vty != NULL) + vty_out(vty, + " TLV size %d exceeds buffer size. Abort!", + TLV_SIZE(tlvh)); + else + zlog_debug( + " TLV size %d exceeds buffer size. Abort!", + TLV_SIZE(tlvh)); + return buf_size; + } + + if (vty != NULL) + vty_out(vty, " Unknown TLV: [type(0x%x), length(0x%x)]\n", + ntohs(tlvh->type), ntohs(tlvh->length)); + else + zlog_debug(" Unknown TLV: [type(0x%x), length(0x%x)]", + ntohs(tlvh->type), ntohs(tlvh->length)); + + return TLV_SIZE(tlvh); +} + +static uint16_t show_vty_pce_info(struct vty *vty, struct tlv_header *ri, + size_t buf_size) +{ + struct tlv_header *tlvh; + uint16_t length = ntohs(ri->length); + uint16_t sum = 0; + + /* Verify that TLV length is valid against remaining buffer size */ + if (length > buf_size) { + vty_out(vty, + " PCE Info TLV size %d exceeds buffer size. Abort!\n", + length); + return buf_size; + } + + for (tlvh = ri; sum < length; tlvh = TLV_HDR_NEXT(tlvh)) { + switch (ntohs(tlvh->type)) { + case RI_PCE_SUBTLV_ADDRESS: + sum += show_vty_pce_subtlv_address(vty, tlvh); + break; + case RI_PCE_SUBTLV_PATH_SCOPE: + sum += show_vty_pce_subtlv_path_scope(vty, tlvh); + break; + case RI_PCE_SUBTLV_DOMAIN: + sum += show_vty_pce_subtlv_domain(vty, tlvh); + break; + case RI_PCE_SUBTLV_NEIGHBOR: + sum += show_vty_pce_subtlv_neighbor(vty, tlvh); + break; + case RI_PCE_SUBTLV_CAP_FLAG: + sum += show_vty_pce_subtlv_cap_flag(vty, tlvh); + break; + default: + sum += show_vty_unknown_tlv(vty, tlvh, length - sum); + break; + } + } + return sum; +} + +/* Display Segment Routing Algorithm TLV information */ +static uint16_t show_vty_sr_algorithm(struct vty *vty, struct tlv_header *tlvh) +{ + struct ri_sr_tlv_sr_algorithm *algo = + (struct ri_sr_tlv_sr_algorithm *)tlvh; + int i; + + check_tlv_size(ALGORITHM_COUNT, "Segment Routing Algorithm"); + + if (vty != NULL) { + vty_out(vty, " Segment Routing Algorithm TLV:\n"); + for (i = 0; i < ntohs(algo->header.length); i++) { + switch (algo->value[i]) { + case 0: + vty_out(vty, " Algorithm %d: SPF\n", i); + break; + case 1: + vty_out(vty, " Algorithm %d: Strict SPF\n", + i); + break; + default: + vty_out(vty, + " Algorithm %d: Unknown value %d\n", i, + algo->value[i]); + break; + } + } + } else { + zlog_debug(" Segment Routing Algorithm TLV:"); + for (i = 0; i < ntohs(algo->header.length); i++) + switch (algo->value[i]) { + case 0: + zlog_debug(" Algorithm %d: SPF", i); + break; + case 1: + zlog_debug(" Algorithm %d: Strict SPF", i); + break; + default: + zlog_debug(" Algorithm %d: Unknown value %d", + i, algo->value[i]); + break; + } + } + + return TLV_SIZE(tlvh); +} + +/* Display Segment Routing SID/Label Range TLV information */ +static uint16_t show_vty_sr_range(struct vty *vty, struct tlv_header *tlvh) +{ + struct ri_sr_tlv_sid_label_range *range = + (struct ri_sr_tlv_sid_label_range *)tlvh; + + check_tlv_size(RI_SR_TLV_LABEL_RANGE_SIZE, "SR Label Range"); + + if (vty != NULL) { + vty_out(vty, + " Segment Routing %s Range TLV:\n" + " Range Size = %d\n" + " SID Label = %d\n\n", + ntohs(range->header.type) == RI_SR_TLV_SRGB_LABEL_RANGE + ? "Global" + : "Local", + GET_RANGE_SIZE(ntohl(range->size)), + GET_LABEL(ntohl(range->lower.value))); + } else { + zlog_debug( + " Segment Routing %s Range TLV: Range Size = %d SID Label = %d", + ntohs(range->header.type) == RI_SR_TLV_SRGB_LABEL_RANGE + ? "Global" + : "Local", + GET_RANGE_SIZE(ntohl(range->size)), + GET_LABEL(ntohl(range->lower.value))); + } + + return TLV_SIZE(tlvh); +} + +/* Display Segment Routing Maximum Stack Depth TLV information */ +static uint16_t show_vty_sr_msd(struct vty *vty, struct tlv_header *tlvh) +{ + struct ri_sr_tlv_node_msd *msd = (struct ri_sr_tlv_node_msd *)tlvh; + + check_tlv_size(RI_SR_TLV_NODE_MSD_SIZE, "Node Maximum Stack Depth"); + + if (vty != NULL) { + vty_out(vty, + " Segment Routing MSD TLV:\n" + " Node Maximum Stack Depth = %d\n", + msd->value); + } else { + zlog_debug( + " Segment Routing MSD TLV: Node Maximum Stack Depth = %d", + msd->value); + } + + return TLV_SIZE(tlvh); +} + +static void ospf_router_info_show_info(struct vty *vty, + struct json_object *json, + struct ospf_lsa *lsa) +{ + struct lsa_header *lsah = lsa->data; + struct tlv_header *tlvh; + uint16_t length = 0, sum = 0; + + if (json) + return; + + /* Initialize TLV browsing */ + length = lsa->size - OSPF_LSA_HEADER_SIZE; + + for (tlvh = TLV_HDR_TOP(lsah); sum < length && tlvh; + tlvh = TLV_HDR_NEXT(tlvh)) { + switch (ntohs(tlvh->type)) { + case RI_TLV_CAPABILITIES: + sum += show_vty_router_cap(vty, tlvh); + break; + case RI_TLV_PCE: + tlvh++; + sum += TLV_HDR_SIZE; + sum += show_vty_pce_info(vty, tlvh, length - sum); + break; + case RI_SR_TLV_SR_ALGORITHM: + sum += show_vty_sr_algorithm(vty, tlvh); + break; + case RI_SR_TLV_SRGB_LABEL_RANGE: + case RI_SR_TLV_SRLB_LABEL_RANGE: + sum += show_vty_sr_range(vty, tlvh); + break; + case RI_SR_TLV_NODE_MSD: + sum += show_vty_sr_msd(vty, tlvh); + break; + + default: + sum += show_vty_unknown_tlv(vty, tlvh, length); + break; + } + } + + return; +} + +static void ospf_router_info_config_write_router(struct vty *vty) +{ + struct ospf_pce_info *pce = &OspfRI.pce_info; + struct listnode *node; + struct ri_pce_subtlv_domain *domain; + struct ri_pce_subtlv_neighbor *neighbor; + struct in_addr tmp; + + if (!OspfRI.enabled) + return; + + if (OspfRI.scope == OSPF_OPAQUE_AS_LSA) + vty_out(vty, " router-info as\n"); + else + vty_out(vty, " router-info area\n"); + + if (OspfRI.pce_info.enabled) { + + if (pce->pce_address.header.type != 0) + vty_out(vty, " pce address %pI4\n", + &pce->pce_address.address.value); + + if (pce->pce_cap_flag.header.type != 0) + vty_out(vty, " pce flag 0x%x\n", + ntohl(pce->pce_cap_flag.value)); + + for (ALL_LIST_ELEMENTS_RO(pce->pce_domain, node, domain)) { + if (domain->header.type != 0) { + if (domain->type == PCE_DOMAIN_TYPE_AREA) { + tmp.s_addr = domain->value; + vty_out(vty, " pce domain area %pI4\n", + &tmp); + } else { + vty_out(vty, " pce domain as %d\n", + ntohl(domain->value)); + } + } + } + + for (ALL_LIST_ELEMENTS_RO(pce->pce_neighbor, node, neighbor)) { + if (neighbor->header.type != 0) { + if (neighbor->type == PCE_DOMAIN_TYPE_AREA) { + tmp.s_addr = neighbor->value; + vty_out(vty, + " pce neighbor area %pI4\n", + &tmp); + } else { + vty_out(vty, " pce neighbor as %d\n", + ntohl(neighbor->value)); + } + } + } + + if (pce->pce_scope.header.type != 0) + vty_out(vty, " pce scope 0x%x\n", + ntohl(OspfRI.pce_info.pce_scope.value)); + } + return; +} + +/*------------------------------------------------------------------------* + * Following are vty command functions. + *------------------------------------------------------------------------*/ +/* Simple wrapper schedule RI LSA action in function of the scope */ +static void ospf_router_info_schedule(enum lsa_opcode opcode) +{ + struct listnode *node, *nnode; + struct ospf_ri_area_info *ai; + + if (OspfRI.scope == OSPF_OPAQUE_AS_LSA) { + if (CHECK_FLAG(OspfRI.as_flags, RIFLG_LSA_ENGAGED)) + ospf_router_info_lsa_schedule(NULL, opcode); + else if (opcode == REORIGINATE_THIS_LSA) + ospf_router_info_lsa_schedule(NULL, opcode); + } else { + for (ALL_LIST_ELEMENTS(OspfRI.area_info, node, nnode, ai)) { + if (CHECK_FLAG(ai->flags, RIFLG_LSA_ENGAGED)) + ospf_router_info_lsa_schedule(ai, opcode); + } + } +} + +DEFUN (router_info, + router_info_area_cmd, + "router-info <as|area [A.B.C.D]>", + OSPF_RI_STR + "Enable the Router Information functionality with AS flooding scope\n" + "Enable the Router Information functionality with Area flooding scope\n" + "OSPF area ID in IP format (deprecated)\n") +{ + int idx_mode = 1; + uint8_t scope; + VTY_DECLVAR_INSTANCE_CONTEXT(ospf, ospf); + + if (OspfRI.enabled) + return CMD_SUCCESS; + + /* Check that the OSPF is using default VRF */ + if (ospf->vrf_id != VRF_DEFAULT) { + vty_out(vty, + "Router Information is only supported in default VRF\n"); + return CMD_WARNING_CONFIG_FAILED; + } + + /* Check and get Area value if present */ + if (strncmp(argv[idx_mode]->arg, "as", 2) == 0) + scope = OSPF_OPAQUE_AS_LSA; + else + scope = OSPF_OPAQUE_AREA_LSA; + + /* First start to register Router Information callbacks */ + if (!OspfRI.registered && (ospf_router_info_register(scope)) != 0) { + vty_out(vty, + "%% Unable to register Router Information callbacks."); + flog_err( + EC_OSPF_INIT_FAIL, + "RI (%s): Unable to register Router Information callbacks. Abort!", + __func__); + return CMD_WARNING_CONFIG_FAILED; + } + + OspfRI.enabled = true; + + if (IS_DEBUG_OSPF_EVENT) + zlog_debug("RI-> Router Information (%s flooding): OFF -> ON", + OspfRI.scope == OSPF_OPAQUE_AREA_LSA ? "Area" + : "AS"); + + /* + * Following code is intended to handle two cases; + * + * 1) Router Information was disabled at startup time, but now become + * enabled. + * 2) Router Information was once enabled then disabled, and now enabled + * again. + */ + + initialize_params(&OspfRI); + + /* Originate or Refresh RI LSA if already engaged */ + ospf_router_info_schedule(REORIGINATE_THIS_LSA); + return CMD_SUCCESS; +} + + +DEFUN (no_router_info, + no_router_info_cmd, + "no router-info", + NO_STR + "Disable the Router Information functionality\n") +{ + + if (!OspfRI.enabled) + return CMD_SUCCESS; + + if (IS_DEBUG_OSPF_EVENT) + zlog_debug("RI-> Router Information: ON -> OFF"); + + ospf_router_info_schedule(FLUSH_THIS_LSA); + + OspfRI.enabled = false; + + return CMD_SUCCESS; +} + +static int ospf_ri_enabled(struct vty *vty) +{ + if (OspfRI.enabled) + return 1; + + if (vty) + vty_out(vty, "%% OSPF RI is not turned on\n"); + + return 0; +} + +DEFUN (pce_address, + pce_address_cmd, + "pce address A.B.C.D", + PCE_STR + "Stable IP address of the PCE\n" + "PCE address in IPv4 address format\n") +{ + int idx_ipv4 = 2; + struct in_addr value; + struct ospf_pce_info *pi = &OspfRI.pce_info; + + if (!ospf_ri_enabled(vty)) + return CMD_WARNING_CONFIG_FAILED; + + if (!inet_aton(argv[idx_ipv4]->arg, &value)) { + vty_out(vty, "Please specify PCE Address by A.B.C.D\n"); + return CMD_WARNING_CONFIG_FAILED; + } + + if (ntohs(pi->pce_address.header.type) == 0 + || ntohl(pi->pce_address.address.value.s_addr) + != ntohl(value.s_addr)) { + + set_pce_address(value, pi); + + /* Refresh RI LSA if already engaged */ + ospf_router_info_schedule(REFRESH_THIS_LSA); + } + + return CMD_SUCCESS; +} + +DEFUN (no_pce_address, + no_pce_address_cmd, + "no pce address [A.B.C.D]", + NO_STR + PCE_STR + "Disable PCE address\n" + "PCE address in IPv4 address format\n") +{ + + unset_param(&OspfRI.pce_info.pce_address); + + /* Refresh RI LSA if already engaged */ + ospf_router_info_schedule(REFRESH_THIS_LSA); + + return CMD_SUCCESS; +} + +DEFUN (pce_path_scope, + pce_path_scope_cmd, + "pce scope BITPATTERN", + PCE_STR + "Path scope visibilities of the PCE for path computation\n" + "32-bit Hexadecimal value\n") +{ + int idx_bitpattern = 2; + uint32_t scope; + struct ospf_pce_info *pi = &OspfRI.pce_info; + + if (!ospf_ri_enabled(vty)) + return CMD_WARNING_CONFIG_FAILED; + + if (sscanf(argv[idx_bitpattern]->arg, "0x%x", &scope) != 1) { + vty_out(vty, "pce_path_scope: fscanf: %s\n", + safe_strerror(errno)); + return CMD_WARNING_CONFIG_FAILED; + } + + if (ntohl(pi->pce_scope.header.type) == 0 + || scope != pi->pce_scope.value) { + set_pce_path_scope(scope, pi); + + /* Refresh RI LSA if already engaged */ + ospf_router_info_schedule(REFRESH_THIS_LSA); + } + + return CMD_SUCCESS; +} + +DEFUN (no_pce_path_scope, + no_pce_path_scope_cmd, + "no pce scope [BITPATTERN]", + NO_STR + PCE_STR + "Disable PCE path scope\n" + "32-bit Hexadecimal value\n") +{ + + unset_param(&OspfRI.pce_info.pce_address); + + /* Refresh RI LSA if already engaged */ + ospf_router_info_schedule(REFRESH_THIS_LSA); + + return CMD_SUCCESS; +} + +DEFUN (pce_domain, + pce_domain_cmd, + "pce domain as (0-65535)", + PCE_STR + "Configure PCE domain AS number\n" + "AS number where the PCE as visibilities for path computation\n" + "AS number in decimal <0-65535>\n") +{ + int idx_number = 3; + + uint32_t as; + struct ospf_pce_info *pce = &OspfRI.pce_info; + struct listnode *node; + struct ri_pce_subtlv_domain *domain; + + if (!ospf_ri_enabled(vty)) + return CMD_WARNING_CONFIG_FAILED; + + if (sscanf(argv[idx_number]->arg, "%" SCNu32, &as) != 1) { + vty_out(vty, "pce_domain: fscanf: %s\n", safe_strerror(errno)); + return CMD_WARNING_CONFIG_FAILED; + } + + /* Check if the domain is not already in the domain list */ + for (ALL_LIST_ELEMENTS_RO(pce->pce_domain, node, domain)) { + if (ntohl(domain->header.type) == 0 && as == domain->value) + return CMD_SUCCESS; + } + + /* Create new domain if not found */ + set_pce_domain(PCE_DOMAIN_TYPE_AS, as, pce); + + /* Refresh RI LSA if already engaged */ + ospf_router_info_schedule(REFRESH_THIS_LSA); + + return CMD_SUCCESS; +} + +DEFUN (no_pce_domain, + no_pce_domain_cmd, + "no pce domain as (0-65535)", + NO_STR + PCE_STR + "Disable PCE domain AS number\n" + "AS number where the PCE as visibilities for path computation\n" + "AS number in decimal <0-65535>\n") +{ + int idx_number = 4; + + uint32_t as; + struct ospf_pce_info *pce = &OspfRI.pce_info; + + if (sscanf(argv[idx_number]->arg, "%" SCNu32, &as) != 1) { + vty_out(vty, "no_pce_domain: fscanf: %s\n", + safe_strerror(errno)); + return CMD_WARNING_CONFIG_FAILED; + } + + /* Unset corresponding PCE domain */ + unset_pce_domain(PCE_DOMAIN_TYPE_AS, as, pce); + + /* Refresh RI LSA if already engaged */ + ospf_router_info_schedule(REFRESH_THIS_LSA); + + return CMD_SUCCESS; +} + +DEFUN (pce_neigbhor, + pce_neighbor_cmd, + "pce neighbor as (0-65535)", + PCE_STR + "Configure PCE neighbor domain AS number\n" + "AS number of PCE neighbors\n" + "AS number in decimal <0-65535>\n") +{ + int idx_number = 3; + + uint32_t as; + struct ospf_pce_info *pce = &OspfRI.pce_info; + struct listnode *node; + struct ri_pce_subtlv_neighbor *neighbor; + + if (!ospf_ri_enabled(vty)) + return CMD_WARNING_CONFIG_FAILED; + + if (sscanf(argv[idx_number]->arg, "%" SCNu32, &as) != 1) { + vty_out(vty, "pce_neighbor: fscanf: %s\n", + safe_strerror(errno)); + return CMD_WARNING_CONFIG_FAILED; + } + + /* Check if the domain is not already in the domain list */ + for (ALL_LIST_ELEMENTS_RO(pce->pce_neighbor, node, neighbor)) { + if (ntohl(neighbor->header.type) == 0 && as == neighbor->value) + return CMD_SUCCESS; + } + + /* Create new domain if not found */ + set_pce_neighbor(PCE_DOMAIN_TYPE_AS, as, pce); + + /* Refresh RI LSA if already engaged */ + ospf_router_info_schedule(REFRESH_THIS_LSA); + + return CMD_SUCCESS; +} + +DEFUN (no_pce_neighbor, + no_pce_neighbor_cmd, + "no pce neighbor as (0-65535)", + NO_STR + PCE_STR + "Disable PCE neighbor AS number\n" + "AS number of PCE neighbor\n" + "AS number in decimal <0-65535>\n") +{ + int idx_number = 4; + + uint32_t as; + struct ospf_pce_info *pce = &OspfRI.pce_info; + + if (sscanf(argv[idx_number]->arg, "%" SCNu32, &as) != 1) { + vty_out(vty, "no_pce_neighbor: fscanf: %s\n", + safe_strerror(errno)); + return CMD_WARNING_CONFIG_FAILED; + } + + /* Unset corresponding PCE domain */ + unset_pce_neighbor(PCE_DOMAIN_TYPE_AS, as, pce); + + /* Refresh RI LSA if already engaged */ + ospf_router_info_schedule(REFRESH_THIS_LSA); + + return CMD_SUCCESS; +} + +DEFUN (pce_cap_flag, + pce_cap_flag_cmd, + "pce flag BITPATTERN", + PCE_STR + "Capabilities of the PCE for path computation\n" + "32-bit Hexadecimal value\n") +{ + int idx_bitpattern = 2; + + uint32_t cap; + struct ospf_pce_info *pce = &OspfRI.pce_info; + + if (!ospf_ri_enabled(vty)) + return CMD_WARNING_CONFIG_FAILED; + + if (sscanf(argv[idx_bitpattern]->arg, "0x%x", &cap) != 1) { + vty_out(vty, "pce_cap_flag: fscanf: %s\n", + safe_strerror(errno)); + return CMD_WARNING_CONFIG_FAILED; + } + + if (ntohl(pce->pce_cap_flag.header.type) == 0 + || cap != pce->pce_cap_flag.value) { + set_pce_cap_flag(cap, pce); + + /* Refresh RI LSA if already engaged */ + ospf_router_info_schedule(REFRESH_THIS_LSA); + } + + return CMD_SUCCESS; +} + +DEFUN (no_pce_cap_flag, + no_pce_cap_flag_cmd, + "no pce flag", + NO_STR + PCE_STR + "Disable PCE capabilities\n") +{ + + unset_param(&OspfRI.pce_info.pce_cap_flag); + + /* Refresh RI LSA if already engaged */ + ospf_router_info_schedule(REFRESH_THIS_LSA); + + return CMD_SUCCESS; +} + +DEFUN (show_ip_ospf_router_info, + show_ip_ospf_router_info_cmd, + "show ip ospf router-info", + SHOW_STR + IP_STR + OSPF_STR + "Router Information\n") +{ + + if (OspfRI.enabled) { + vty_out(vty, "--- Router Information parameters ---\n"); + show_vty_router_cap(vty, &OspfRI.router_cap.header); + } else { + if (vty != NULL) + vty_out(vty, + " Router Information is disabled on this router\n"); + } + return CMD_SUCCESS; +} + +DEFUN (show_ip_opsf_router_info_pce, + show_ip_ospf_router_info_pce_cmd, + "show ip ospf router-info pce", + SHOW_STR + IP_STR + OSPF_STR + "Router Information\n" + "PCE information\n") +{ + + struct ospf_pce_info *pce = &OspfRI.pce_info; + struct listnode *node; + struct ri_pce_subtlv_domain *domain; + struct ri_pce_subtlv_neighbor *neighbor; + + if ((OspfRI.enabled) && (OspfRI.pce_info.enabled)) { + vty_out(vty, "--- PCE parameters ---\n"); + + if (pce->pce_address.header.type != 0) + show_vty_pce_subtlv_address(vty, + &pce->pce_address.header); + + if (pce->pce_scope.header.type != 0) + show_vty_pce_subtlv_path_scope(vty, + &pce->pce_scope.header); + + for (ALL_LIST_ELEMENTS_RO(pce->pce_domain, node, domain)) { + if (domain->header.type != 0) + show_vty_pce_subtlv_domain(vty, + &domain->header); + } + + for (ALL_LIST_ELEMENTS_RO(pce->pce_neighbor, node, neighbor)) { + if (neighbor->header.type != 0) + show_vty_pce_subtlv_neighbor(vty, + &neighbor->header); + } + + if (pce->pce_cap_flag.header.type != 0) + show_vty_pce_subtlv_cap_flag(vty, + &pce->pce_cap_flag.header); + + } else { + vty_out(vty, " PCE info is disabled on this router\n"); + } + + return CMD_SUCCESS; +} + +/* Install new CLI commands */ +static void ospf_router_info_register_vty(void) +{ + install_element(VIEW_NODE, &show_ip_ospf_router_info_cmd); + install_element(VIEW_NODE, &show_ip_ospf_router_info_pce_cmd); + + install_element(OSPF_NODE, &router_info_area_cmd); + install_element(OSPF_NODE, &no_router_info_cmd); + install_element(OSPF_NODE, &pce_address_cmd); + install_element(OSPF_NODE, &no_pce_address_cmd); + install_element(OSPF_NODE, &pce_path_scope_cmd); + install_element(OSPF_NODE, &no_pce_path_scope_cmd); + install_element(OSPF_NODE, &pce_domain_cmd); + install_element(OSPF_NODE, &no_pce_domain_cmd); + install_element(OSPF_NODE, &pce_neighbor_cmd); + install_element(OSPF_NODE, &no_pce_neighbor_cmd); + install_element(OSPF_NODE, &pce_cap_flag_cmd); + install_element(OSPF_NODE, &no_pce_cap_flag_cmd); + + return; +} |