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#include <zebra.h>
#include "lib/stream.h"
#include "lib/vty.h"
#include "lib/mpls.h"
#include "lib/if.h"
#include "lib/table.h"
#include "ospfd/ospfd.h"
#include "ospfd/ospf_route.h"
#include "ospfd/ospf_spf.h"
#include "ospfd/ospf_flood.h"
#include "ospfd/ospf_lsa.h"
#include "ospfd/ospf_lsdb.h"
#include "ospfd/ospf_interface.h"
#include "ospfd/ospf_sr.h"
#include "common.h"
struct thread_master *master;
struct zebra_privs_t ospfd_privs;
struct ospf_topology *test_find_topology(const char *name)
{
if (strmatch(name, "topo1"))
return &topo1;
else if (strmatch(name, "topo2"))
return &topo2;
else if (strmatch(name, "topo3"))
return &topo3;
else if (strmatch(name, "topo4"))
return &topo4;
else if (strmatch(name, "topo5"))
return &topo5;
return NULL;
}
int sort_paths(const void **path1, const void **path2)
{
const struct ospf_path *p1 = *path1;
const struct ospf_path *p2 = *path2;
return (p1->nexthop.s_addr - p2->nexthop.s_addr);
}
void print_route_table(struct vty *vty, struct route_table *rt)
{
struct route_node *rn;
struct ospf_route * or ;
struct listnode *pnode;
struct ospf_path *path;
struct mpls_label_stack *label_stack;
char buf[MPLS_LABEL_STRLEN];
for (rn = route_top(rt); rn; rn = route_next(rn)) {
if ((or = rn->info) == NULL)
continue;
vty_out(vty, "N %-18pFX %-15pI4 %d\n", &rn->p,
& or->u.std.area_id, or->cost);
list_sort(or->paths, sort_paths);
for (ALL_LIST_ELEMENTS_RO(or->paths, pnode, path)) {
if (path->nexthop.s_addr == 0)
continue;
vty_out(vty, " -> %pI4 with adv router %pI4",
&path->nexthop, &path->adv_router);
if (path->srni.backup_label_stack) {
label_stack = path->srni.backup_label_stack;
mpls_label2str(label_stack->num_labels,
label_stack->label, buf,
MPLS_LABEL_STRLEN, true);
vty_out(vty, " and backup path %s", buf);
}
vty_out(vty, "\n");
}
}
}
struct ospf_test_node *test_find_node(struct ospf_topology *topology,
const char *hostname)
{
for (int i = 0; topology->nodes[i].hostname[0]; i++)
if (strmatch(hostname, topology->nodes[i].hostname))
return &topology->nodes[i];
return NULL;
}
static void inject_router_lsa(struct vty *vty, struct ospf *ospf,
struct ospf_topology *topology,
struct ospf_test_node *root,
struct ospf_test_node *tnode)
{
struct ospf_area *area;
struct in_addr router_id;
struct in_addr adj_router_id;
struct prefix_ipv4 prefix;
struct in_addr data;
struct stream *s;
struct lsa_header *lsah;
struct ospf_lsa *new;
int length;
unsigned long putp;
uint16_t link_count;
struct ospf_test_node *tfound_adj_node;
struct ospf_test_adj *tadj;
bool is_self_lsa = false;
area = ospf->backbone;
inet_aton(tnode->router_id, &router_id);
if (strncmp(root->router_id, tnode->router_id, 256) == 0)
is_self_lsa = true;
s = stream_new(OSPF_MAX_LSA_SIZE);
lsa_header_set(s, LSA_OPTIONS_GET(area) | LSA_OPTIONS_NSSA_GET(area),
OSPF_ROUTER_LSA, router_id, router_id);
stream_putc(s, router_lsa_flags(area));
stream_putc(s, 0);
putp = stream_get_endp(s);
stream_putw(s, 0);
for (link_count = 0; tnode->adjacencies[link_count].hostname[0];
link_count++) {
tadj = &tnode->adjacencies[link_count];
tfound_adj_node = test_find_node(topology, tadj->hostname);
str2prefix_ipv4(tnode->adjacencies[link_count].network,
&prefix);
inet_aton(tfound_adj_node->router_id, &adj_router_id);
data.s_addr = prefix.prefix.s_addr;
link_info_set(&s, adj_router_id, data,
LSA_LINK_TYPE_POINTOPOINT, 0, tadj->metric);
masklen2ip(prefix.prefixlen, &data);
link_info_set(&s, prefix.prefix, data, LSA_LINK_TYPE_STUB, 0,
tadj->metric);
}
/* Don't forget the node itself (just a stub) */
str2prefix_ipv4(tnode->router_id, &prefix);
data.s_addr = 0xffffffff;
link_info_set(&s, prefix.prefix, data, LSA_LINK_TYPE_STUB, 0, 0);
/* Take twice the link count (for P2P and stub) plus the local stub */
stream_putw_at(s, putp, (2 * link_count) + 1);
length = stream_get_endp(s);
lsah = (struct lsa_header *)STREAM_DATA(s);
lsah->length = htons(length);
new = ospf_lsa_new_and_data(length);
new->area = area;
new->vrf_id = area->ospf->vrf_id;
if (is_self_lsa)
SET_FLAG(new->flags, OSPF_LSA_SELF | OSPF_LSA_SELF_CHECKED);
memcpy(new->data, lsah, length);
stream_free(s);
ospf_lsdb_add(area->lsdb, new);
if (is_self_lsa) {
ospf_lsa_unlock(&area->router_lsa_self);
area->router_lsa_self = ospf_lsa_lock(new);
}
}
static void inject_sr_db_entry(struct vty *vty, struct ospf_test_node *tnode,
struct ospf_topology *topology)
{
struct ospf_test_node *tfound_adj_node;
struct ospf_test_adj *tadj;
struct in_addr router_id;
struct in_addr remote_id;
struct sr_node *srn;
struct sr_prefix *srp;
struct sr_link *srl;
int link_count;
inet_aton(tnode->router_id, &router_id);
srn = ospf_sr_node_create(&router_id);
srn->srgb.range_size = 8000;
srn->srgb.lower_bound = 16000;
srn->msd = 16;
srn->srlb.range_size = 1000;
srn->srlb.lower_bound = 15000;
/* Prefix SID */
srp = XCALLOC(MTYPE_OSPF_SR_PARAMS, sizeof(struct sr_prefix));
srp->adv_router = router_id;
srp->sid = tnode->label;
srp->srn = srn;
listnode_add(srn->ext_prefix, srp);
/* Adjacency SIDs for all adjacencies */
for (link_count = 0; tnode->adjacencies[link_count].hostname[0];
link_count++) {
tadj = &tnode->adjacencies[link_count];
tfound_adj_node = test_find_node(topology, tadj->hostname);
srl = XCALLOC(MTYPE_OSPF_SR_PARAMS, sizeof(struct sr_link));
srl->adv_router = router_id;
inet_aton(tfound_adj_node->router_id, &remote_id);
srl->remote_id = remote_id;
srl->type = ADJ_SID;
srl->sid[0] = srn->srlb.lower_bound + tadj->label;
srl->srn = srn;
listnode_add(srn->ext_link, srl);
}
}
int topology_load(struct vty *vty, struct ospf_topology *topology,
struct ospf_test_node *root, struct ospf *ospf)
{
struct ospf_test_node *tnode;
for (int i = 0; topology->nodes[i].hostname[0]; i++) {
tnode = &topology->nodes[i];
/* Inject a router LSA for each node, used for SPF */
inject_router_lsa(vty, ospf, topology, root, tnode);
/*
* SR information could also be inected via LSAs, but directly
* filling the SR DB with labels is just easier.
*/
inject_sr_db_entry(vty, tnode, topology);
}
return 0;
}
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