diff options
Diffstat (limited to 'proto/ospf/topology.c')
| -rw-r--r-- | proto/ospf/topology.c | 1419 |
1 files changed, 1082 insertions, 337 deletions
diff --git a/proto/ospf/topology.c b/proto/ospf/topology.c index 5d8c7a9d..3ca5e774 100644 --- a/proto/ospf/topology.c +++ b/proto/ospf/topology.c @@ -20,7 +20,76 @@ #define HASH_LO_STEP 2 #define HASH_LO_MIN 8 -int ptp_unnumbered_stub_lsa = 0; +void originate_prefix_rt_lsa(struct ospf_area *oa); +void originate_prefix_net_lsa(struct ospf_iface *ifa); +void flush_prefix_net_lsa(struct ospf_iface *ifa); + +#ifdef OSPFv2 +#define ipa_to_rid(x) _I(x) +#else /* OSPFv3 */ +#define ipa_to_rid(x) _I3(x) +#endif + + +#ifdef OSPFv2 +static inline u32 +fibnode_to_lsaid(struct proto_ospf *po, struct fib_node *fn) +{ + /* We have to map IP prefixes to u32 in such manner that resulting + u32 interpreted as IP address is a member of given + prefix. Therefore, /32 prefix have to be mapped on itself. + All received prefixes have to be mapped on different u32s. + + We have an assumption that if there is nontrivial (non-/32) + network prefix, then there is not /32 prefix for the first + and the last IP address of the network (these are usually + reserved, therefore it is not an important restriction). + The network prefix is mapped to the first or the last + IP address in the manner that disallow collisions - we + use IP address that cannot be used by parent prefix. + + For example: + 192.168.0.0/24 maps to 192.168.0.255 + 192.168.1.0/24 maps to 192.168.1.0 + because 192.168.0.0 and 192.168.1.255 might be used by + 192.168.0.0/23 . + + This is not compatible with older RFC 1583, so we have an option + to the RFC 1583 compatible assignment (that always uses the first + address) which disallows subnetting. + + Appendig E of RFC 2328 suggests different algorithm, that tries + to maximize both compatibility and subnetting. But as it is not + possible to have both reliably and the suggested algorithm was + unnecessary complicated and it does crazy things like changing + LSA ID for a network because different network appeared, we + choose a different way. */ + + u32 id = _I(fn->prefix); + + if ((po->rfc1583) || (fn->pxlen == 0) || (fn->pxlen == 32)) + return id; + + if (id & (1 << (32 - fn->pxlen))) + return id; + else + return id | ~u32_mkmask(fn->pxlen); +} + +#else /* OSPFv3 */ + +static inline u32 +fibnode_to_lsaid(struct proto_ospf *po, struct fib_node *fn) +{ + /* In OSPFv3, it is simpler. There is not a requirement + for membership of the result in input network, so we + just use hash-based unique ID. */ + + return fn->uid; +} + +#endif + static void * lsab_alloc(struct proto_ospf *po, unsigned size) @@ -52,6 +121,19 @@ lsab_flush(struct proto_ospf *po) return r; } +static inline void * +lsab_offset(struct proto_ospf *po, unsigned offset) +{ + return ((byte *) po->lsab) + offset; +} + +static inline void * +lsab_end(struct proto_ospf *po) +{ + return ((byte *) po->lsab) + po->lsab_used; +} + + static int configured_stubnet(struct ospf_area *oa, struct ifa *a) { @@ -72,25 +154,53 @@ configured_stubnet(struct ospf_area *oa, struct ifa *a) return 0; } +int +bcast_net_active(struct ospf_iface *ifa) +{ + struct ospf_neighbor *neigh; + + if (ifa->state == OSPF_IS_WAITING) + return 0; + + WALK_LIST(neigh, ifa->neigh_list) + { + if (neigh->state == NEIGHBOR_FULL) + { + if (neigh->rid == ifa->drid) + return 1; + + if (ifa->state == OSPF_IS_DR) + return 1; + } + } + + return 0; +} + + +#ifdef OSPFv2 + static void * -originate_rt_lsa_body(struct ospf_area *oa, u16 * length) +originate_rt_lsa_body(struct ospf_area *oa, u16 *length) { struct proto_ospf *po = oa->po; struct ospf_iface *ifa; - int i = 0, j = 0, k = 0, bitv = 0; + int i = 0, bitv = 0; struct ospf_lsa_rt *rt; struct ospf_lsa_rt_link *ln; struct ospf_neighbor *neigh; - DBG("%s: Originating RT_lsa body for area %R.\n", po->proto.name, - oa->areaid); - ASSERT(po->lsab_used == 0); rt = lsab_allocz(po, sizeof(struct ospf_lsa_rt)); + + rt->options = 0; + if (po->areano > 1) - rt->veb.bit.b = 1; + rt->options |= OPT_RT_B; + if ((po->ebit) && (!oa->stub)) - rt->veb.bit.e = 1; + rt->options |= OPT_RT_E; + rt = NULL; /* buffer might be reallocated later */ WALK_LIST(ifa, po->iface_list) @@ -123,7 +233,7 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 * length) ln->data = (ifa->iface->addr->flags & IA_UNNUMBERED) ? ifa->iface->index : ipa_to_u32(ifa->iface->addr->ip); ln->metric = ifa->cost; - ln->notos = 0; + ln->padding = 0; i++; master = 1; } @@ -131,26 +241,14 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 * length) case OSPF_IT_BCAST: /* RFC2328 - 12.4.1.2 */ case OSPF_IT_NBMA: - if (ifa->state == OSPF_IS_WAITING) - break; - - j = 0, k = 0; - WALK_LIST(neigh, ifa->neigh_list) - { - if ((neigh->rid == ifa->drid) && (neigh->state == NEIGHBOR_FULL)) - k = 1; - if (neigh->state == NEIGHBOR_FULL) - j = 1; - } - - if (((ifa->state == OSPF_IS_DR) && (j == 1)) || (k == 1)) + if (bcast_net_active(ifa)) { ln = lsab_alloc(po, sizeof(struct ospf_lsa_rt_link)); ln->type = LSART_NET; ln->id = ipa_to_u32(ifa->drip); ln->data = ipa_to_u32(ifa->iface->addr->ip); ln->metric = ifa->cost; - ln->notos = 0; + ln->padding = 0; i++; master = 1; } @@ -165,7 +263,7 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 * length) ln->id = neigh->rid; ln->data = ipa_to_u32(ifa->iface->addr->ip); ln->metric = ifa->cost; - ln->notos = 0; + ln->padding = 0; i++; master = 1; } @@ -192,7 +290,7 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 * length) ln->id = ipa_to_u32(a->prefix); ln->data = ipa_to_u32(ipa_mkmask(a->pxlen)); ln->metric = ifa->cost; - ln->notos = 0; + ln->padding = 0; i++; } } @@ -206,17 +304,111 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 * length) ln->id = ipa_to_u32(sn->px.addr); ln->data = ipa_to_u32(ipa_mkmask(sn->px.len)); ln->metric = sn->cost; - ln->notos = 0; + ln->padding = 0; i++; } rt = po->lsab; rt->links = i; - rt->veb.bit.v = bitv; + + if (bitv) + rt->options |= OPT_RT_V; + + *length = po->lsab_used + sizeof(struct ospf_lsa_header); + return lsab_flush(po); +} + +#else /* OSPFv3 */ + +static void +add_lsa_rt_link(struct proto_ospf *po, struct ospf_iface *ifa, u8 type, u32 nif, u32 id) +{ + struct ospf_lsa_rt_link *ln = lsab_alloc(po, sizeof(struct ospf_lsa_rt_link)); + ln->type = type; + ln->padding = 0; + ln->metric = ifa->cost; + ln->lif = ifa->iface->index; + ln->nif = nif; + ln->id = id; +} + +static void * +originate_rt_lsa_body(struct ospf_area *oa, u16 *length) +{ + struct proto_ospf *po = oa->po; + struct ospf_iface *ifa; + int bitv = 0; + struct ospf_lsa_rt *rt; + struct ospf_neighbor *neigh; + + ASSERT(po->lsab_used == 0); + rt = lsab_allocz(po, sizeof(struct ospf_lsa_rt)); + + rt->options = oa->options & OPTIONS_MASK; + + if (po->areano > 1) + rt->options |= OPT_RT_B; + + if ((po->ebit) && (!oa->stub)) + rt->options |= OPT_RT_E; + + rt = NULL; /* buffer might be reallocated later */ + + WALK_LIST(ifa, po->iface_list) + { + if ((ifa->type == OSPF_IT_VLINK) && (ifa->voa == oa) && + (!EMPTY_LIST(ifa->neigh_list))) + { + neigh = (struct ospf_neighbor *) HEAD(ifa->neigh_list); + if ((neigh->state == NEIGHBOR_FULL) && (ifa->cost <= 0xffff)) + bitv = 1; + } + + if ((ifa->oa != oa) || (ifa->state == OSPF_IS_DOWN)) + continue; + + /* BIRD does not support interface loops */ + ASSERT(ifa->state != OSPF_IS_LOOP); + + /* RFC5340 - 4.4.3.2 */ + switch (ifa->type) + { + case OSPF_IT_PTP: + neigh = (struct ospf_neighbor *) HEAD(ifa->neigh_list); + if ((!EMPTY_LIST(ifa->neigh_list)) && (neigh->state == NEIGHBOR_FULL)) + add_lsa_rt_link(po, ifa, LSART_PTP, neigh->iface_id, neigh->rid); + break; + + case OSPF_IT_BCAST: + case OSPF_IT_NBMA: + if (bcast_net_active(ifa)) + add_lsa_rt_link(po, ifa, LSART_NET, ifa->dr_iface_id, ifa->drid); + break; + + case OSPF_IT_VLINK: + neigh = (struct ospf_neighbor *) HEAD(ifa->neigh_list); + if ((!EMPTY_LIST(ifa->neigh_list)) && (neigh->state == NEIGHBOR_FULL) && (ifa->cost <= 0xffff)) + add_lsa_rt_link(po, ifa, LSART_VLNK, neigh->iface_id, neigh->rid); + break; + + default: + log("Unknown interface type %s", ifa->iface->name); + break; + } + } + + if (bitv) + { + rt = po->lsab; + rt->options |= OPT_RT_V; + } + *length = po->lsab_used + sizeof(struct ospf_lsa_header); return lsab_flush(po); } +#endif + /** * originate_rt_lsa - build new instance of router LSA * @oa: ospf_area which is LSA built to @@ -232,10 +424,33 @@ originate_rt_lsa(struct ospf_area *oa) struct ospf_lsa_header lsa; struct proto_ospf *po = oa->po; struct proto *p = &po->proto; - u32 rtid = po->proto.cf->global->router_id; - struct top_hash_entry *en; void *body; + OSPF_TRACE(D_EVENTS, "Originating router-LSA for area %R", oa->areaid); + + lsa.age = 0; + lsa.type = LSA_T_RT; + +#ifdef OSPFv2 + lsa.options = oa->options; +#endif + + lsa.id = po->router_id; + lsa.rt = po->router_id; + lsa.sn = oa->rt ? (oa->rt->lsa.sn + 1) : LSA_INITSEQNO; + u32 dom = oa->areaid; + + body = originate_rt_lsa_body(oa, &lsa.length); + lsasum_calculate(&lsa, body); + oa->rt = lsa_install_new(po, &lsa, dom, body); + ospf_lsupd_flood(po, NULL, NULL, &lsa, dom, 1); +} + +void +update_rt_lsa(struct ospf_area *oa) +{ + struct proto_ospf *po = oa->po; + if ((oa->rt) && ((oa->rt->inst_t + MINLSINTERVAL)) > now) return; /* @@ -244,59 +459,65 @@ originate_rt_lsa(struct ospf_area *oa) * try to do it next tick. */ - OSPF_TRACE(D_EVENTS, "Originating RT_lsa for area %R.", oa->areaid); + originate_rt_lsa(oa); +#ifdef OSPFv3 + originate_prefix_rt_lsa(oa); +#endif - lsa.age = 0; - lsa.id = rtid; - lsa.type = LSA_T_RT; - lsa.rt = rtid; - lsa.options = oa->opt.byte; - if (oa->rt == NULL) - { - lsa.sn = LSA_INITSEQNO; - } - else - { - lsa.sn = oa->rt->lsa.sn + 1; - } - body = originate_rt_lsa_body(oa, &lsa.length); - lsasum_calculate(&lsa, body); - en = lsa_install_new(&lsa, body, oa); - oa->rt = en; - ospf_lsupd_flood(NULL, NULL, &oa->rt->lsa, NULL, oa, 1); schedule_rtcalc(po); oa->origrt = 0; } static void * -originate_net_lsa_body(struct ospf_iface *ifa, u16 * length, +originate_net_lsa_body(struct ospf_iface *ifa, u16 *length, struct proto_ospf *po) { u16 i = 1; struct ospf_neighbor *n; - u32 *body; struct ospf_lsa_net *net; + int nodes = ifa->fadj + 1; - net = mb_alloc(po->proto.pool, sizeof(u32) * (ifa->fadj + 1) + - sizeof(struct ospf_lsa_net)); + net = mb_alloc(po->proto.pool, sizeof(struct ospf_lsa_net) + + nodes * sizeof(u32)); + +#ifdef OSPFv2 net->netmask = ipa_mkmask(ifa->iface->addr->pxlen); +#endif + +#ifdef OSPFv3 + /* In OSPFv3, we would like to merge options from Link LSAs of added neighbors */ + struct top_hash_entry *en; + u32 options = 0; +#endif + + net->routers[0] = po->router_id; - body = (u32 *) (net + 1); - i = 1; - *body = po->proto.cf->global->router_id; WALK_LIST(n, ifa->neigh_list) { if (n->state == NEIGHBOR_FULL) { - *(body + i) = n->rid; +#ifdef OSPFv3 + en = ospf_hash_find(po->gr, ifa->iface->index, n->iface_id, n->rid, LSA_T_LINK); + if (en) + options |= ((struct ospf_lsa_link *) en->lsa_body)->options; +#endif + + net->routers[i] = n->rid; i++; } } - *length = i * sizeof(u32) + sizeof(struct ospf_lsa_header) + - sizeof(struct ospf_lsa_net); + ASSERT(i == nodes); + +#ifdef OSPFv3 + net->options = options & OPTIONS_MASK; +#endif + + *length = sizeof(struct ospf_lsa_header) + sizeof(struct ospf_lsa_net) + + nodes * sizeof(u32); return net; } + /** * originate_net_lsa - originates of deletes network LSA * @ifa: interface which is LSA originated for @@ -310,12 +531,60 @@ void originate_net_lsa(struct ospf_iface *ifa) { struct proto_ospf *po = ifa->oa->po; - struct ospf_lsa_header lsa; - u32 rtid = po->proto.cf->global->router_id; struct proto *p = &po->proto; + struct ospf_lsa_header lsa; + u32 dom = ifa->oa->areaid; + void *body; - if (ifa->nlsa && ((ifa->nlsa->inst_t + MINLSINTERVAL) > now)) + OSPF_TRACE(D_EVENTS, "Originating network-LSA for iface %s", + ifa->iface->name); + + lsa.age = 0; + lsa.type = LSA_T_NET; + +#ifdef OSPFv2 + lsa.options = ifa->oa->options; + lsa.id = ipa_to_u32(ifa->iface->addr->ip); +#else /* OSPFv3 */ + lsa.id = ifa->iface->index; +#endif + + lsa.rt = po->router_id; + lsa.sn = ifa->net_lsa ? (ifa->net_lsa->lsa.sn + 1) : LSA_INITSEQNO; + + body = originate_net_lsa_body(ifa, &lsa.length, po); + lsasum_calculate(&lsa, body); + ifa->net_lsa = lsa_install_new(po, &lsa, dom, body); + ospf_lsupd_flood(po, NULL, NULL, &lsa, dom, 1); +} + +void +flush_net_lsa(struct ospf_iface *ifa) +{ + struct proto_ospf *po = ifa->oa->po; + struct proto *p = &po->proto; + u32 dom = ifa->oa->areaid; + + if (ifa->net_lsa == NULL) + return; + + OSPF_TRACE(D_EVENTS, "Flushing network-LSA for iface %s", + ifa->iface->name); + ifa->net_lsa->lsa.sn += 1; + ifa->net_lsa->lsa.age = LSA_MAXAGE; + lsasum_calculate(&ifa->net_lsa->lsa, ifa->net_lsa->lsa_body); + ospf_lsupd_flood(po, NULL, NULL, &ifa->net_lsa->lsa, dom, 0); + flush_lsa(ifa->net_lsa, po); + ifa->net_lsa = NULL; +} + +void +update_net_lsa(struct ospf_iface *ifa) +{ + struct proto_ospf *po = ifa->oa->po; + + if (ifa->net_lsa && ((ifa->net_lsa->inst_t + MINLSINTERVAL) > now)) return; /* * It's too early to originate new network LSA. We will @@ -323,233 +592,241 @@ originate_net_lsa(struct ospf_iface *ifa) */ if ((ifa->state != OSPF_IS_DR) || (ifa->fadj == 0)) - { - if (ifa->nlsa == NULL) - return; + { + flush_net_lsa(ifa); +#ifdef OSPFv3 + flush_prefix_net_lsa(ifa); +#endif + } + else + { + originate_net_lsa(ifa); +#ifdef OSPFv3 + originate_prefix_net_lsa(ifa); +#endif + } - OSPF_TRACE(D_EVENTS, "Deleting Net lsa for iface \"%s\".", - ifa->iface->name); - ifa->nlsa->lsa.sn += 1; - ifa->nlsa->lsa.age = LSA_MAXAGE; - lsasum_calculate(&ifa->nlsa->lsa, ifa->nlsa->lsa_body); - ospf_lsupd_flood(NULL, NULL, &ifa->nlsa->lsa, NULL, ifa->oa, 0); - s_rem_node(SNODE ifa->nlsa); - if (ifa->nlsa->lsa_body != NULL) - mb_free(ifa->nlsa->lsa_body); - ifa->nlsa->lsa_body = NULL; - ospf_hash_delete(po->gr, ifa->nlsa); - schedule_rtcalc(po); - ifa->nlsa = NULL; - return; - } + schedule_rtcalc(po); + ifa->orignet = 0; +} - OSPF_TRACE(D_EVENTS, "Originating Net lsa for iface \"%s\".", - ifa->iface->name); +#ifdef OSPFv2 - lsa.age = 0; - lsa.id = ipa_to_u32(ifa->iface->addr->ip); - lsa.type = LSA_T_NET; - lsa.rt = rtid; - lsa.options = ifa->oa->opt.byte; - if (ifa->nlsa == NULL) - { - lsa.sn = LSA_INITSEQNO; - } - else - { - lsa.sn = ifa->nlsa->lsa.sn + 1; - } +static inline void * +originate_sum_lsa_body(struct proto_ospf *po, u16 *length, u32 mlen, u32 metric) +{ + struct ospf_lsa_sum *sum = mb_alloc(po->proto.pool, sizeof(struct ospf_lsa_sum)); + *length = sizeof(struct ospf_lsa_header) + sizeof(struct ospf_lsa_sum); - body = originate_net_lsa_body(ifa, &lsa.length, po); - lsasum_calculate(&lsa, body); - ifa->nlsa = lsa_install_new(&lsa, body, ifa->oa); - ospf_lsupd_flood(NULL, NULL, &ifa->nlsa->lsa, NULL, ifa->oa, 1); - ifa->orignet = 0; + sum->netmask = ipa_mkmask(mlen); + sum->metric = metric; + + return sum; } +#define originate_sum_net_lsa_body(po,length,fn,metric) \ + originate_sum_lsa_body(po, length, (fn)->pxlen, metric) -static void * -originate_ext_lsa_body(net * n, rte * e, struct proto_ospf *po, - struct ea_list *attrs) +#define originate_sum_rt_lsa_body(po,length,drid,metric,options) \ + originate_sum_lsa_body(po, length, 0, metric) + +static inline int +check_sum_net_lsaid_collision(struct fib_node *fn, struct top_hash_entry *en) { - struct proto *p = &po->proto; - struct ospf_lsa_ext *ext; - struct ospf_lsa_ext_tos *et; - u32 m1 = ea_get_int(attrs, EA_OSPF_METRIC1, LSINFINITY); - u32 m2 = ea_get_int(attrs, EA_OSPF_METRIC2, 10000); - u32 tag = ea_get_int(attrs, EA_OSPF_TAG, 0); - int inas = 0; + struct ospf_lsa_sum *sum = en->lsa_body; + return fn->pxlen != ipa_mklen(sum->netmask); +} - ext = mb_alloc(p->pool, sizeof(struct ospf_lsa_ext) + - sizeof(struct ospf_lsa_ext_tos)); - ext->netmask = ipa_mkmask(n->n.pxlen); +static inline int +check_ext_lsaid_collision(struct fib_node *fn, struct top_hash_entry *en) +{ + struct ospf_lsa_ext *ext = en->lsa_body; + return fn->pxlen != ipa_mklen(ext->netmask); +} - et = (struct ospf_lsa_ext_tos *) (ext + 1); +#else /* OSPFv3 */ - if (m1 != LSINFINITY) - { - et->etm.metric = m1; - et->etm.etos.tos = 0; - et->etm.etos.ebit = 0; - } - else - { - et->etm.metric = m2; - et->etm.etos.tos = 0; - et->etm.etos.ebit = 1; - } - et->tag = tag; - if (!ipa_equal(e->attrs->gw, IPA_NONE)) - { - if (ospf_iface_find((struct proto_ospf *) p, e->attrs->iface) != NULL) - inas = 1; - } +static inline void * +originate_sum_net_lsa_body(struct proto_ospf *po, u16 *length, struct fib_node *fn, u32 metric) +{ + int size = sizeof(struct ospf_lsa_sum_net) + IPV6_PREFIX_SPACE(fn->pxlen); + struct ospf_lsa_sum_net *sum = mb_alloc(po->proto.pool, size); + *length = sizeof(struct ospf_lsa_header) + size; - if (!inas) - et->fwaddr = IPA_NONE; - else - et->fwaddr = e->attrs->gw; - return ext; + sum->metric = metric; + put_ipv6_prefix(sum->prefix, fn->prefix, fn->pxlen, 0, 0); + + return sum; } -/** - * max_ext_lsa - calculate the maximum amount of external networks - * possible for the given prefix length. - * @pxlen: network prefix length - * - * This is a fix for the previous static use of MAXNETS which did - * only work correct if MAXNETS < possible IPs for given prefix. - * This solution is kind of a hack as there can now only be one - * route for /32 type entries but this is better than the crashes - * I did experience whith close together /32 routes originating - * on different hosts. - */ +static inline int +check_sum_net_lsaid_collision(struct fib_node *fn, struct top_hash_entry *en) +{ + struct ospf_lsa_sum_net *sum = en->lsa_body; + ip_addr prefix; + int pxlen; + u8 pxopts; + u16 rest; + + lsa_get_ipv6_prefix(sum->prefix, &prefix, &pxlen, &pxopts, &rest); + return (fn->pxlen != pxlen) || !ipa_equal(fn->prefix, prefix); +} -int -max_ext_lsa(unsigned pxlen) +static inline int +check_ext_lsaid_collision(struct fib_node *fn, struct top_hash_entry *en) { - int i; - for (i = 1; pxlen < BITS_PER_IP_ADDRESS; pxlen++, i <<= 1) - if (i >= MAXNETS) - return MAXNETS; - return i; + struct ospf_lsa_ext *ext = en->lsa_body; + ip_addr prefix; + int pxlen; + u8 pxopts; + u16 rest; + + lsa_get_ipv6_prefix(ext->rest, &prefix, &pxlen, &pxopts, &rest); + return (fn->pxlen != pxlen) || !ipa_equal(fn->prefix, prefix); } +static inline void * +originate_sum_rt_lsa_body(struct proto_ospf *po, u16 *length, u32 drid, u32 metric, u32 options) +{ + struct ospf_lsa_sum_rt *sum = mb_alloc(po->proto.pool, sizeof(struct ospf_lsa_sum_rt)); + *length = sizeof(struct ospf_lsa_header) + sizeof(struct ospf_lsa_sum_rt); + + sum->options = options & OPTIONS_MASK; + sum->metric = metric; + sum->drid = drid; + + return sum; +} + +#endif + void -flush_sum_lsa(struct ospf_area *oa, struct fib_node *fn, int type) +originate_sum_net_lsa(struct ospf_area *oa, struct fib_node *fn, int metric) { struct proto_ospf *po = oa->po; struct proto *p = &po->proto; struct top_hash_entry *en; - u32 rtid = po->proto.cf->global->router_id; + u32 dom = oa->areaid; struct ospf_lsa_header lsa; - int max, i; - struct ospf_lsa_sum *sum = NULL; + void *body; - lsa.rt = rtid; - lsa.type = LSA_T_SUM_NET; - if (type == ORT_ROUTER) - lsa.type = LSA_T_SUM_RT; + OSPF_TRACE(D_EVENTS, "Originating net-summary-LSA for %I/%d (metric %d)", + fn->prefix, fn->pxlen, metric); - max = max_ext_lsa(fn->pxlen); + /* options argument is used in ORT_NET and OSPFv3 only */ + lsa.age = 0; +#ifdef OSPFv2 + lsa.options = oa->options; +#endif + lsa.type = LSA_T_SUM_NET; + lsa.id = fibnode_to_lsaid(po, fn); + lsa.rt = po->router_id; + lsa.sn = LSA_INITSEQNO; - for (i = 0; i < max; i++) + if ((en = ospf_hash_find_header(po->gr, dom, &lsa)) != NULL) { - lsa.id = ipa_to_u32(fn->prefix) + i; - if ((en = ospf_hash_find_header(po->gr, oa->areaid, &lsa)) != NULL) - { - sum = en->lsa_body; - if ((type == ORT_ROUTER) || (fn->pxlen == ipa_mklen(sum->netmask))) + if (check_sum_net_lsaid_collision(fn, en)) { - en->lsa.age = LSA_MAXAGE; - en->lsa.sn = LSA_MAXSEQNO; - lsasum_calculate(&en->lsa, sum); - OSPF_TRACE(D_EVENTS, "Flushing summary lsa. (id=%R, type=%d)", - en->lsa.id, en->lsa.type); - ospf_lsupd_flood(NULL, NULL, &en->lsa, NULL, oa, 1); - if (can_flush_lsa(po)) flush_lsa(en, po); - break; + log(L_ERR, "%s: LSAID collision for %I/%d", + p->name, fn->prefix, fn->pxlen); + return; } - } + + lsa.sn = en->lsa.sn + 1; } + + body = originate_sum_net_lsa_body(po, &lsa.length, fn, metric); + lsasum_calculate(&lsa, body); + en = lsa_install_new(po, &lsa, dom, body); + ospf_lsupd_flood(po, NULL, NULL, &lsa, dom, 1); } void -originate_sum_lsa(struct ospf_area *oa, struct fib_node *fn, int type, int metric) +originate_sum_rt_lsa(struct ospf_area *oa, struct fib_node *fn, int metric, u32 options) { struct proto_ospf *po = oa->po; struct proto *p = &po->proto; struct top_hash_entry *en; - u32 rtid = po->proto.cf->global->router_id; + u32 dom = oa->areaid; struct ospf_lsa_header lsa; - int i, max, mlen = fn->pxlen, free = 0; - u32 freeid = 0xFFFF; - struct ospf_lsa_sum *sum = NULL; - union ospf_lsa_sum_tm *tm; - lsa.type = LSA_T_SUM_NET; + void *body; - if (type == ORT_ROUTER) - { - lsa.type = LSA_T_SUM_RT; - mlen = 0; - } + OSPF_TRACE(D_EVENTS, "Originating rt-summary-LSA for %R (metric %d)", + lsa.id, metric); lsa.age = 0; - lsa.rt = rtid; +#ifdef OSPFv2 + lsa.options = oa->options; +#endif + lsa.type = LSA_T_SUM_RT; + /* In OSPFv3, LSA ID is meaningless, but we still use Router ID of ASBR */ + lsa.id = ipa_to_rid(fn->prefix); + lsa.rt = po->router_id; lsa.sn = LSA_INITSEQNO; - lsa.length = sizeof(struct ospf_lsa_sum) + sizeof(union ospf_lsa_sum_tm) + - sizeof(struct ospf_lsa_header); - lsa.options = oa->opt.byte; - max = max_ext_lsa(fn->pxlen); - for (i = 0; i < max; i++) - { - lsa.id = ipa_to_u32(fn->prefix) + i; - if ((en = ospf_hash_find_header(po->gr, oa->areaid, &lsa)) == NULL) + if ((en = ospf_hash_find_header(po->gr, dom, &lsa)) != NULL) + lsa.sn = en->lsa.sn + 1; + + body = originate_sum_rt_lsa_body(po, &lsa.length, lsa.id, metric, options); + lsasum_calculate(&lsa, body); + en = lsa_install_new(po, &lsa, dom, body); + ospf_lsupd_flood(po, NULL, NULL, &lsa, dom, 1); +} + + +void +originate_sum_lsa(struct ospf_area *oa, struct fib_node *fn, int type, int metric, u32 options) +{ + if (type == ORT_NET) + originate_sum_net_lsa(oa, fn, metric); + else + originate_sum_rt_lsa(oa, fn, metric, options); +} + + +void +flush_sum_lsa(struct ospf_area *oa, struct fib_node *fn, int type) +{ + struct proto_ospf *po = oa->po; + struct proto *p = &po->proto; + struct top_hash_entry *en; + struct ospf_lsa_header lsa; + + lsa.rt = po->router_id; + if (type == ORT_NET) { - if (!free) - { - freeid = lsa.id; - free = 1; - } + lsa.id = fibnode_to_lsaid(po, fn); + lsa.type = LSA_T_SUM_NET; } - else + else { - sum = en->lsa_body; - if (mlen == ipa_mklen(sum->netmask)) - { - tm = (union ospf_lsa_sum_tm *) (sum + 1); - if (tm->metric == (unsigned) metric) return; /* No reason for origination */ - lsa.sn = en->lsa.sn + 1; - freeid = en->lsa.id; - free = 1; - break; - } + /* In OSPFv3, LSA ID is meaningless, but we still use Router ID of ASBR */ + lsa.id = ipa_to_rid(fn->prefix); + lsa.type = LSA_T_SUM_RT; } - } - if(!free) - { - log("%s: got more routes for one /%d network then %d, ignoring", p->name, - fn->pxlen, max); - return; - } - lsa.id = freeid; - - OSPF_TRACE(D_EVENTS, "Originating summary (type %d) lsa for %I/%d (met %d).", lsa.type, fn->prefix, - fn->pxlen, metric); + if ((en = ospf_hash_find_header(po->gr, oa->areaid, &lsa)) != NULL) + { + if ((type == ORT_NET) && check_sum_net_lsaid_collision(fn, en)) + { + log(L_ERR, "%s: LSAID collision for %I/%d", + p->name, fn->prefix, fn->pxlen); + return; + } - sum = mb_alloc(p->pool, sizeof(struct ospf_lsa_sum) + sizeof(union ospf_lsa_sum_tm)); - sum->netmask = ipa_mkmask(mlen); - tm = (union ospf_lsa_sum_tm *) (sum + 1); - tm->metric = metric; - tm->tos.tos = 0; + struct ospf_lsa_sum *sum = en->lsa_body; + en->lsa.age = LSA_MAXAGE; + en->lsa.sn = LSA_MAXSEQNO; + lsasum_calculate(&en->lsa, sum); - lsasum_calculate(&lsa, sum); - en = lsa_install_new(&lsa, sum, oa); - ospf_lsupd_flood(NULL, NULL, &en->lsa, NULL, oa, 1); + OSPF_TRACE(D_EVENTS, "Flushing summary-LSA (id=%R, type=%d)", + en->lsa.id, en->lsa.type); + ospf_lsupd_flood(po, NULL, NULL, &en->lsa, oa->areaid, 1); + if (can_flush_lsa(po)) flush_lsa(en, po); + } } + void check_sum_lsa(struct proto_ospf *po, ort *nf, int dest) { @@ -572,7 +849,7 @@ check_sum_lsa(struct proto_ospf *po, ort *nf, int dest) flush = 0; if ((nf->n.metric1 >= LSINFINITY) || (nf->n.type > RTS_OSPF_IA)) flush = 1; - if ((dest == ORT_ROUTER) && (!(nf->n.capa & ORTA_ASBR))) + if ((dest == ORT_ROUTER) && (!(nf->n.options & ORTA_ASBR))) flush = 1; if ((!nf->n.oa) || (nf->n.oa->areaid == oa->areaid)) flush = 1; @@ -591,21 +868,82 @@ check_sum_lsa(struct proto_ospf *po, ort *nf, int dest) mlen = nf->fn.pxlen; ip = ipa_and(nf->fn.prefix, ipa_mkmask(mlen)); - if ((oa == po->backbone) && (nf->n.type == RTS_OSPF_IA)) flush = 1; /* Only intra-area can go to the backbone */ + if ((oa == po->backbone) && (nf->n.type == RTS_OSPF_IA)) + flush = 1; /* Only intra-area can go to the backbone */ - if ((!flush) && (dest == ORT_NET) && fib_route(&nf->n.oa->net_fib, ip, mlen)) /* The route fits into area networks */ + if ((!flush) && (dest == ORT_NET) && fib_route(&nf->n.oa->net_fib, ip, mlen)) { + /* The route fits into area networks */ flush = 1; if ((nf->n.oa == po->backbone) && (oa->trcap)) flush = 0; } - if(flush) + if (flush) flush_sum_lsa(oa, &nf->fn, dest); else - originate_sum_lsa(oa, &nf->fn, dest, nf->n.metric1); + originate_sum_lsa(oa, &nf->fn, dest, nf->n.metric1, nf->n.options); } } + +static void * +originate_ext_lsa_body(net *n, rte *e, u16 *length, struct proto_ospf *po, + struct ea_list *attrs) +{ + struct proto *p = &po->proto; + struct ospf_lsa_ext *ext; + u32 m1 = ea_get_int(attrs, EA_OSPF_METRIC1, LSINFINITY); + u32 m2 = ea_get_int(attrs, EA_OSPF_METRIC2, 10000); + u32 tag = ea_get_int(attrs, EA_OSPF_TAG, 0); + int gw = 0; + int size = sizeof(struct ospf_lsa_ext); + u32 *buf; + + if ((e->attrs->dest == RTD_ROUTER) && + !ipa_equal(e->attrs->gw, IPA_NONE) && + !ipa_has_link_scope(e->attrs->gw) && + (ospf_iface_find((struct proto_ospf *) p, e->attrs->iface) != NULL)) + gw = 1; + +#ifdef OSPFv3 + size += IPV6_PREFIX_SPACE(n->n.pxlen); + + if (gw) + size += 16; + + if (tag) + size += 4; +#endif + + ext = mb_alloc(p->pool, size); + *length = sizeof(struct ospf_lsa_header) + size; + + ext->metric = (m1 != LSINFINITY) ? m1 : (m2 | LSA_EXT_EBIT); + +#ifdef OSPFv2 + ext->netmask = ipa_mkmask(n->n.pxlen); + ext->fwaddr = gw ? e->attrs->gw : IPA_NONE; + ext->tag = tag; +#else /* OSPFv3 */ + buf = ext->rest; + buf = put_ipv6_prefix(buf, n->n.prefix, n->n.pxlen, 0, 0); + + if (gw) + { + ext->metric |= LSA_EXT_FBIT; + buf = put_ipv6_addr(buf, e->attrs->gw); + } + + if (tag) + { + ext->metric |= LSA_EXT_TBIT; + *buf++ = tag; + } +#endif + + return ext; +} + /** * originate_ext_lsa - new route received from nest and filters * @n: network prefix and mask @@ -625,75 +963,399 @@ void originate_ext_lsa(net * n, rte * e, struct proto_ospf *po, struct ea_list *attrs) { + struct proto *p = &po->proto; + struct fib_node *fn = &n->n; struct ospf_lsa_header lsa; - u32 rtid = po->proto.cf->global->router_id; struct top_hash_entry *en = NULL; - void *body = NULL; - struct proto *p = &po->proto; + void *body; struct ospf_area *oa; - struct ospf_lsa_ext *ext1, *ext2; - int i, max; - OSPF_TRACE(D_EVENTS, "Originating Ext lsa for %I/%d.", n->n.prefix, - n->n.pxlen); + OSPF_TRACE(D_EVENTS, "Originating AS-external-LSA for %I/%d", + fn->prefix, fn->pxlen); lsa.age = 0; - lsa.id = ipa_to_u32(n->n.prefix); +#ifdef OSPFv2 + lsa.options = 0; /* or oa->options ? */ +#endif lsa.type = LSA_T_EXT; - lsa.rt = rtid; + lsa.id = fibnode_to_lsaid(po, fn); + lsa.rt = po->router_id; lsa.sn = LSA_INITSEQNO; - lsa.options = 0; - body = originate_ext_lsa_body(n, e, po, attrs); - lsa.length = sizeof(struct ospf_lsa_ext) + sizeof(struct ospf_lsa_ext_tos) + - sizeof(struct ospf_lsa_header); - ext1 = body; - max = max_ext_lsa(n->n.pxlen); + if ((en = ospf_hash_find_header(po->gr, 0, &lsa)) != NULL) + { + if (check_ext_lsaid_collision(fn, en)) + { + log(L_ERR, "%s: LSAID collision for %I/%d", + p->name, fn->prefix, fn->pxlen); + return; + } + + lsa.sn = en->lsa.sn + 1; + } + + body = originate_ext_lsa_body(n, e, &lsa.length, po, attrs); + lsasum_calculate(&lsa, body); - for (i = 0; i < max; i++) + en = lsa_install_new(po, &lsa, 0, body); + ospf_lsupd_flood(po, NULL, NULL, &lsa, 0, 1); + + if (po->ebit == 0) { - if ((en = ospf_hash_find_header(po->gr, 0 , &lsa)) != NULL) + po->ebit = 1; + WALK_LIST(oa, po->area_list) { - ext2 = en->lsa_body; - if (ipa_compare(ext1->netmask, ext2->netmask) != 0) - lsa.id++; - else - break; + schedule_rt_lsa(oa); } - else - break; } +} - if (i == max) - { - log("%s: got more routes for one /%d network then %d, ignoring", p->name, - n->n.pxlen, max); - mb_free(body); +void +flush_ext_lsa(net *n, struct proto_ospf *po) +{ + struct proto *p = &po->proto; + struct fib_node *fn = &n->n; + struct ospf_area *oa; + struct top_hash_entry *en; + + OSPF_TRACE(D_EVENTS, "Flushing AS-external-LSA for %I/%d", + fn->prefix, fn->pxlen); + + u32 lsaid = fibnode_to_lsaid(po, fn); + + if (en = ospf_hash_find(po->gr, 0, lsaid, po->router_id, LSA_T_EXT)) + { + if (check_ext_lsaid_collision(fn, en)) + { + log(L_ERR, "%s: LSAID collision for %I/%d", + p->name, fn->prefix, fn->pxlen); + return; + } + + ospf_lsupd_flush_nlsa(po, en); + } +} + + +#ifdef OSPFv3 + +static void * +originate_link_lsa_body(struct ospf_iface *ifa, u16 *length) +{ + struct proto_ospf *po = ifa->oa->po; + struct ospf_lsa_link *ll; + int i = 0; + u8 flags; + + ASSERT(po->lsab_used == 0); + ll = lsab_allocz(po, sizeof(struct ospf_lsa_link)); + ll->options = ifa->oa->options | (ifa->priority << 24); + ll->lladdr = ifa->lladdr; + ll = NULL; /* buffer might be reallocated later */ + + struct ifa *a; + WALK_LIST(a, ifa->iface->addrs) + { + if ((a->flags & IA_SECONDARY) || + (a->scope < SCOPE_SITE)) + continue; + + flags = (a->pxlen < MAX_PREFIX_LENGTH) ? 0 : OPT_PX_LA; + put_ipv6_prefix(lsab_alloc(po, IPV6_PREFIX_SPACE(a->pxlen)), + a->ip, a->pxlen, flags, 0); + i++; + } + + ll = po->lsab; + ll->pxcount = i; + *length = po->lsab_used + sizeof(struct ospf_lsa_header); + return lsab_flush(po); +} + +void +originate_link_lsa(struct ospf_iface *ifa) +{ + struct ospf_lsa_header lsa; + struct proto_ospf *po = ifa->oa->po; + struct proto *p = &po->proto; + void *body; + + /* FIXME check for vlink and skip that? */ + OSPF_TRACE(D_EVENTS, "Originating link-LSA for iface %s", ifa->iface->name); + + lsa.age = 0; + lsa.type = LSA_T_LINK; + lsa.id = ifa->iface->index; + lsa.rt = po->router_id; + lsa.sn = ifa->link_lsa ? (ifa->link_lsa->lsa.sn + 1) : LSA_INITSEQNO; + u32 dom = ifa->iface->index; + + body = originate_link_lsa_body(ifa, &lsa.length); + lsasum_calculate(&lsa, body); + ifa->link_lsa = lsa_install_new(po, &lsa, dom, body); + ospf_lsupd_flood(po, NULL, NULL, &lsa, dom, 1); + + /* Just to be sure to not forget on our link LSA */ + if (ifa->state == OSPF_IS_DR) + schedule_net_lsa(ifa); +} + +void +update_link_lsa(struct ospf_iface *ifa) +{ + if (ifa->link_lsa && ((ifa->link_lsa->inst_t + MINLSINTERVAL) > now)) return; + /* + * It's too early to originate new link LSA. We will + * try to do it next tick + */ + originate_link_lsa(ifa); + ifa->origlink = 0; +} + +static void * +originate_prefix_rt_lsa_body(struct ospf_area *oa, u16 *length) +{ + struct proto_ospf *po = oa->po; + struct ospf_iface *ifa; + struct ospf_lsa_prefix *lp; + int net_lsa; + int i = 0; + u8 flags; + + ASSERT(po->lsab_used == 0); + lp = lsab_allocz(po, sizeof(struct ospf_lsa_prefix)); + lp->ref_type = LSA_T_RT; + lp->ref_id = 0; + lp->ref_rt = po->router_id; + lp = NULL; /* buffer might be reallocated later */ + + WALK_LIST(ifa, po->iface_list) + { + if ((ifa->oa != oa) || (ifa->state == OSPF_IS_DOWN)) + continue; + + if ((ifa->type == OSPF_IT_BCAST) || + (ifa->type == OSPF_IT_NBMA)) + net_lsa = bcast_net_active(ifa); + else + net_lsa = 0; + + struct ifa *a; + WALK_LIST(a, ifa->iface->addrs) + { + if (((a->pxlen < MAX_PREFIX_LENGTH) && net_lsa) || + (a->flags & IA_SECONDARY) || + (a->flags & IA_UNNUMBERED) || + (a->scope <= SCOPE_LINK) || + configured_stubnet(oa, a)) + continue; + + flags = (a->pxlen < MAX_PREFIX_LENGTH) ? 0 : OPT_PX_LA; + put_ipv6_prefix(lsab_alloc(po, IPV6_PREFIX_SPACE(a->pxlen)), + a->ip, a->pxlen, flags, ifa->cost); + i++; + } } + + /* FIXME Handle vlinks? see RFC5340, page 38 */ + + struct ospf_stubnet_config *sn; + WALK_LIST(sn, oa->ac->stubnet_list) + if (!sn->hidden) + { + flags = (sn->px.len < MAX_PREFIX_LENGTH) ? 0 : OPT_PX_LA; + put_ipv6_prefix(lsab_alloc(po, IPV6_PREFIX_SPACE(sn->px.len)), + sn->px.addr, sn->px.len, flags, sn->cost); + i++; + } + + lp = po->lsab; + lp->pxcount = i; + *length = po->lsab_used + sizeof(struct ospf_lsa_header); + return lsab_flush(po); +} + +void +originate_prefix_rt_lsa(struct ospf_area *oa) +{ + struct proto_ospf *po = oa->po; + struct proto *p = &po->proto; + struct ospf_lsa_header lsa; + void *body; + + OSPF_TRACE(D_EVENTS, "Originating router prefix-LSA for area %R", oa->areaid); + + lsa.age = 0; + lsa.type = LSA_T_PREFIX; + lsa.id = 0; + lsa.rt = po->router_id; + lsa.sn = oa->pxr_lsa ? (oa->pxr_lsa->lsa.sn + 1) : LSA_INITSEQNO; + u32 dom = oa->areaid; + + body = originate_prefix_rt_lsa_body(oa, &lsa.length); lsasum_calculate(&lsa, body); - WALK_LIST(oa, po->area_list) - { - if (!oa->stub) + oa->pxr_lsa = lsa_install_new(po, &lsa, dom, body); + ospf_lsupd_flood(po, NULL, NULL, &lsa, dom, 1); +} + + +static inline int +prefix_space(u32 *buf) +{ + int pxl = *buf >> 24; + return IPV6_PREFIX_SPACE(pxl); +} + +static inline int +prefix_same(u32 *b1, u32 *b2) +{ + int pxl1 = *b1 >> 24; + int pxl2 = *b2 >> 24; + int pxs, i; + + if (pxl1 != pxl2) + return 0; + + pxs = IPV6_PREFIX_WORDS(pxl1); + for (i = 1; i < pxs; i++) + if (b1[i] != b2[i]) + return 0; + + return 1; +} + +static inline u32 * +prefix_advance(u32 *buf) +{ + int pxl = *buf >> 24; + return buf + IPV6_PREFIX_WORDS(pxl); +} + +static void +add_prefix(struct proto_ospf *po, u32 *px, int offset, int *pxc) +{ + u32 *pxl = lsab_offset(po, offset); + int i; + for (i = 0; i < *pxc; i++) { - en = lsa_install_new(&lsa, body, oa); - ospf_lsupd_flood(NULL, NULL, &en->lsa, NULL, oa, 1); - body = originate_ext_lsa_body(n, e, po, attrs); + if (prefix_same(px, pxl)) + { + /* Options should be logically OR'ed together */ + *pxl |= *px; + return; + } + pxl = prefix_advance(pxl); } - } - mb_free(body); - if (po->ebit == 0) - { - po->ebit = 1; - WALK_LIST(oa, po->area_list) + ASSERT(pxl == lsab_end(po)); + + int pxspace = prefix_space(px); + pxl = lsab_alloc(po, pxspace); + memcpy(pxl, px, pxspace); + (*pxc)++; +} + +static void +add_link_lsa(struct proto_ospf *po, struct top_hash_entry *en, int offset, int *pxc) +{ + struct ospf_lsa_link *ll = en->lsa_body; + u32 *pxb = ll->rest; + int j; + + for (j = 0; j < ll->pxcount; j++) { - schedule_rt_lsa(oa); + add_prefix(po, pxb, offset, pxc); + pxb = prefix_advance(pxb); } - } } + +static void * +originate_prefix_net_lsa_body(struct ospf_iface *ifa, u16 *length) +{ + struct proto_ospf *po = ifa->oa->po; + struct ospf_lsa_prefix *lp; + struct ospf_neighbor *n; + struct top_hash_entry *en; + int pxc, offset; + + ASSERT(po->lsab_used == 0); + lp = lsab_allocz(po, sizeof(struct ospf_lsa_prefix)); + lp->ref_type = LSA_T_NET; + lp->ref_id = ifa->net_lsa->lsa.id; + lp->ref_rt = po->router_id; + lp = NULL; /* buffer might be reallocated later */ + + pxc = 0; + offset = po->lsab_used; + + /* Find all Link LSAs associated with the link and merge their prefixes */ + if (ifa->link_lsa) + add_link_lsa(po, ifa->link_lsa, offset, &pxc); + + WALK_LIST(n, ifa->neigh_list) + if ((n->state == NEIGHBOR_FULL) && + (en = ospf_hash_find(po->gr, ifa->iface->index, n->iface_id, n->rid, LSA_T_LINK))) + add_link_lsa(po, en, offset, &pxc); + + lp = po->lsab; + lp->pxcount = pxc; + *length = po->lsab_used + sizeof(struct ospf_lsa_header); + return lsab_flush(po); +} + +void +originate_prefix_net_lsa(struct ospf_iface *ifa) +{ + struct proto_ospf *po = ifa->oa->po; + struct proto *p = &po->proto; + struct ospf_lsa_header lsa; + void *body; + + OSPF_TRACE(D_EVENTS, "Originating network prefix-LSA for iface %s", + ifa->iface->name); + + lsa.age = 0; + lsa.type = LSA_T_PREFIX; + lsa.id = ifa->iface->index; + lsa.rt = po->router_id; + lsa.sn = ifa->pxn_lsa ? (ifa->pxn_lsa->lsa.sn + 1) : LSA_INITSEQNO; + u32 dom = ifa->oa->areaid; + + body = originate_prefix_net_lsa_body(ifa, &lsa.length); + lsasum_calculate(&lsa, body); + ifa->pxn_lsa = lsa_install_new(po, &lsa, dom, body); + ospf_lsupd_flood(po, NULL, NULL, &lsa, dom, 1); +} + +void +flush_prefix_net_lsa(struct ospf_iface *ifa) +{ + struct proto_ospf *po = ifa->oa->po; + struct proto *p = &po->proto; + struct top_hash_entry *en = ifa->pxn_lsa; + u32 dom = ifa->oa->areaid; + + if (en == NULL) + return; + + OSPF_TRACE(D_EVENTS, "Flushing network prefix-LSA for iface %s", + ifa->iface->name); + + en->lsa.sn += 1; + en->lsa.age = LSA_MAXAGE; + lsasum_calculate(&en->lsa, en->lsa_body); + ospf_lsupd_flood(po, NULL, NULL, &en->lsa, dom, 0); + flush_lsa(en, po); + ifa->pxn_lsa = NULL; +} + + +#endif + + static void ospf_top_ht_alloc(struct top_graph *f) { @@ -730,24 +1392,34 @@ ospf_top_hash_u32(u32 a) } static inline unsigned -ospf_top_hash(struct top_graph *f, u32 areaid, u32 lsaid, u32 rtrid, u32 type) -{ -#if 1 /* Dirty patch to make rt table calculation work. */ - return (ospf_top_hash_u32(lsaid) + - ospf_top_hash_u32((type == - LSA_T_NET) ? lsaid : rtrid) + type + - (type == LSA_T_EXT ? 0 : areaid)) & f->hash_mask; -#else +ospf_top_hash(struct top_graph *f, u32 domain, u32 lsaid, u32 rtrid, u32 type) +{ + /* In OSPFv2, we don't know Router ID when looking for network LSAs. + In OSPFv3, we don't know LSA ID when looking for router LSAs. + In both cases, there is (usually) just one (or small number) + appropriate LSA, so we just clear unknown part of key. */ + + return ( +#ifdef OSPFv2 + ((type == LSA_T_NET) ? 0 : ospf_top_hash_u32(rtrid)) + + ospf_top_hash_u32(lsaid) + +#else /* OSPFv3 */ + ospf_top_hash_u32(rtrid) + + ((type == LSA_T_RT) ? 0 : ospf_top_hash_u32(lsaid)) + +#endif + type + domain) & f->hash_mask; + + /* return (ospf_top_hash_u32(lsaid) + ospf_top_hash_u32(rtrid) + type + areaid) & f->hash_mask; -#endif + */ } /** * ospf_top_new - allocated new topology database - * @p: current instance of OSPF + * @p: current instance of ospf * - * This dynamically hashed structure is often used for keeping LSAs. Mainly + * this dynamically hashed structure is often used for keeping lsas. mainly * its used in @ospf_area structure. */ struct top_graph * @@ -781,7 +1453,7 @@ ospf_top_rehash(struct top_graph *f, int step) oldn = f->hash_size; oldt = f->hash_table; - DBG("Re-hashing topology hash from order %d to %d\n", f->hash_order, + DBG("re-hashing topology hash from order %d to %d\n", f->hash_order, f->hash_order + step); f->hash_order += step; ospf_top_ht_alloc(f); @@ -793,7 +1465,7 @@ ospf_top_rehash(struct top_graph *f, int step) while (e) { x = e->next; - n = newt + ospf_top_hash(f, e->oa->areaid, e->lsa.id, e->lsa.rt, e->lsa.type); + n = newt + ospf_top_hash(f, e->domain, e->lsa.id, e->lsa.rt, e->lsa.type); e->next = *n; *n = e; e = x; @@ -802,65 +1474,137 @@ ospf_top_rehash(struct top_graph *f, int step) ospf_top_ht_free(oldt); } +#ifdef OSPFv2 + +u32 +ospf_lsa_domain(u32 type, struct ospf_iface *ifa) +{ + return (type == LSA_T_EXT) ? 0 : ifa->oa->areaid; +} + +#else /* OSPFv3 */ + +u32 +ospf_lsa_domain(u32 type, struct ospf_iface *ifa) +{ + switch (type & LSA_SCOPE_MASK) + { + case LSA_SCOPE_LINK: + return ifa->iface->index; + + case LSA_SCOPE_AREA: + return ifa->oa->areaid; + + case LSA_SCOPE_AS: + default: + return 0; + } +} + +#endif + struct top_hash_entry * -ospf_hash_find_header(struct top_graph *f, u32 areaid, struct ospf_lsa_header *h) +ospf_hash_find_header(struct top_graph *f, u32 domain, struct ospf_lsa_header *h) { - return ospf_hash_find(f, areaid, h->id, h->rt, h->type); + return ospf_hash_find(f, domain, h->id, h->rt, h->type); } struct top_hash_entry * -ospf_hash_get_header(struct top_graph *f, struct ospf_area *oa, struct ospf_lsa_header *h) +ospf_hash_get_header(struct top_graph *f, u32 domain, struct ospf_lsa_header *h) { - return ospf_hash_get(f, oa, h->id, h->rt, h->type); + return ospf_hash_get(f, domain, h->id, h->rt, h->type); } struct top_hash_entry * -ospf_hash_find(struct top_graph *f, u32 areaid, u32 lsa, u32 rtr, u32 type) +ospf_hash_find(struct top_graph *f, u32 domain, u32 lsa, u32 rtr, u32 type) { struct top_hash_entry *e; + e = f->hash_table[ospf_top_hash(f, domain, lsa, rtr, type)]; - e = f->hash_table[ospf_top_hash(f, areaid, lsa, rtr, type)]; + while (e && (e->lsa.id != lsa || e->lsa.type != type || e->lsa.rt != rtr || e->domain != domain)) + e = e->next; - /* Dirty patch to make rt table calculation work. */ - if (type == LSA_T_NET) - { - while (e && (e->lsa.id != lsa || e->lsa.type != LSA_T_NET || e->oa->areaid != areaid)) - e = e->next; - } - else if (type == LSA_T_EXT) - { - while (e && (e->lsa.id != lsa || e->lsa.type != type || e->lsa.rt != rtr)) - e = e->next; - } - else - { - while (e && (e->lsa.id != lsa || e->lsa.type != type || e->lsa.rt != rtr || e->oa->areaid != areaid)) + return e; +} + + +#ifdef OSPFv2 + +/* In OSPFv2, sometimes we don't know Router ID when looking for network LSAs. + There should be just one, so we find any match. */ +struct top_hash_entry * +ospf_hash_find_net(struct top_graph *f, u32 domain, u32 lsa) +{ + struct top_hash_entry *e; + e = f->hash_table[ospf_top_hash(f, domain, lsa, 0, LSA_T_NET)]; + + while (e && (e->lsa.id != lsa || e->lsa.type != LSA_T_NET || e->domain != domain)) + e = e->next; + + return e; +} + +#endif + + +#ifdef OSPFv3 + +/* In OSPFv3, usually we don't know LSA ID when looking for router + LSAs. We return matching LSA with smallest LSA ID. */ +struct top_hash_entry * +ospf_hash_find_rt(struct top_graph *f, u32 domain, u32 rtr) +{ + struct top_hash_entry *rv = NULL; + struct top_hash_entry *e; + e = f->hash_table[ospf_top_hash(f, domain, 0, rtr, LSA_T_RT)]; + + while (e) + { + if (e->lsa.rt == rtr && e->lsa.type == LSA_T_RT && e->domain == domain) + if (!rv || e->lsa.id < rv->lsa.id) + rv = e; e = e->next; - } + } + return rv; +} + +static inline struct top_hash_entry * +find_matching_rt(struct top_hash_entry *e, u32 domain, u32 rtr) +{ + while (e && (e->lsa.rt != rtr || e->lsa.type != LSA_T_RT || e->domain != domain)) + e = e->next; return e; } struct top_hash_entry * -ospf_hash_get(struct top_graph *f, struct ospf_area *oa, u32 lsa, u32 rtr, u32 type) +ospf_hash_find_rt_first(struct top_graph *f, u32 domain, u32 rtr) +{ + struct top_hash_entry *e; + e = f->hash_table[ospf_top_hash(f, domain, 0, rtr, LSA_T_RT)]; + return find_matching_rt(e, domain, rtr); +} + +struct top_hash_entry * +ospf_hash_find_rt_next(struct top_hash_entry *e) +{ + return find_matching_rt(e->next, e->domain, e->lsa.rt); +} + +#endif + + +struct top_hash_entry * +ospf_hash_get(struct top_graph *f, u32 domain, u32 lsa, u32 rtr, u32 type) { struct top_hash_entry **ee; struct top_hash_entry *e; - u32 nareaid = (type == LSA_T_EXT ? 0 : oa->areaid); - ee = f->hash_table + ospf_top_hash(f, nareaid, lsa, rtr, type); + ee = f->hash_table + ospf_top_hash(f, domain, lsa, rtr, type); e = *ee; - if (type == LSA_T_EXT) - { - while (e && (e->lsa.id != lsa || e->lsa.rt != rtr || e->lsa.type != type)) - e = e->next; - } - else - { - while (e && (e->lsa.id != lsa || e->lsa.rt != rtr || e->lsa.type != type || e->oa->areaid != nareaid)) - e = e->next; - } + while (e && (e->lsa.id != lsa || e->lsa.rt != rtr || e->lsa.type != type || e->domain != domain)) + e = e->next; if (e) return e; @@ -876,7 +1620,7 @@ ospf_hash_get(struct top_graph *f, struct ospf_area *oa, u32 lsa, u32 rtr, u32 t e->lsa.type = type; e->lsa_body = NULL; e->nhi = NULL; - e->oa = oa; + e->domain = domain; e->next = *ee; *ee = e; if (f->hash_entries++ > f->hash_entries_max) @@ -888,7 +1632,7 @@ void ospf_hash_delete(struct top_graph *f, struct top_hash_entry *e) { struct top_hash_entry **ee = f->hash_table + - ospf_top_hash(f, e->oa->areaid, e->lsa.id, e->lsa.rt, e->lsa.type); + ospf_top_hash(f, e->domain, e->lsa.id, e->lsa.rt, e->lsa.type); while (*ee) { @@ -908,6 +1652,7 @@ ospf_hash_delete(struct top_graph *f, struct top_hash_entry *e) static void ospf_dump_lsa(struct top_hash_entry *he, struct proto *p) { + /* struct ospf_lsa_rt *rt = NULL; struct ospf_lsa_rt_link *rr = NULL; struct ospf_lsa_net *ln = NULL; @@ -916,7 +1661,8 @@ ospf_dump_lsa(struct top_hash_entry *he, struct proto *p) OSPF_TRACE(D_EVENTS, "- %1x %-1R %-1R %4u 0x%08x 0x%04x %-1R", he->lsa.type, he->lsa.id, he->lsa.rt, he->lsa.age, he->lsa.sn, - he->lsa.checksum, he->oa ? he->oa->areaid : 0 ); + he->lsa.checksum, he->domain); + switch (he->lsa.type) { @@ -924,7 +1670,7 @@ ospf_dump_lsa(struct top_hash_entry *he, struct proto *p) rt = he->lsa_body; rr = (struct ospf_lsa_rt_link *) (rt + 1); - for (i = 0; i < rt->links; i++) + for (i = 0; i < lsa_rt_items(&he->lsa); i++) OSPF_TRACE(D_EVENTS, " - %1x %-1R %-1R %5u", rr[i].type, rr[i].id, rr[i].data, rr[i].metric); break; @@ -932,16 +1678,15 @@ ospf_dump_lsa(struct top_hash_entry *he, struct proto *p) case LSA_T_NET: ln = he->lsa_body; rts = (u32 *) (ln + 1); - max = (he->lsa.length - sizeof(struct ospf_lsa_header) - - sizeof(struct ospf_lsa_net)) / sizeof(u32); - for (i = 0; i < max; i++) + for (i = 0; i < lsa_net_items(&he->lsa); i++) OSPF_TRACE(D_EVENTS, " - %-1R", rts[i]); break; default: break; } + */ } void |