mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-12-22 01:31:55 +00:00
More changes to the kernel syncer.
o Now compatible with filtering. o Learning of kernel routes supported only on CONFIG_SELF_CONSCIOUS systems (on the others it's impossible to get it semantically correct). o Learning now stores all of its routes in a separate fib and selects the ones the kernel really uses for forwarding packets. o Better treatment of CONFIG_AUTO_ROUTES ports. o Lots of internal changes.
This commit is contained in:
Martin Mares
parent
69ec9087ad
commit
c10421d3d4
14
nest/route.h
14
nest/route.h
@ -140,18 +140,20 @@ typedef struct rte {
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struct {
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} bgp;
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#endif
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struct { /* Routes internally generated by krt sync */
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int src; /* Alleged route source (see krt.h) */
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} krt_sync;
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struct { /* Routes generated by krt sync (both temporary and inherited ones) */
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s8 src; /* Alleged route source (see krt.h) */
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u8 proto; /* Kernel source protocol ID */
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u8 type; /* Kernel route type */
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u8 seen; /* Seen during last scan */
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u32 metric; /* Kernel metric */
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} krt;
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} u;
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} rte;
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#define REF_CHOSEN 1 /* Currently chosen route */
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extern rtable master_table;
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void rt_init(void);
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void rt_setup(rtable *, char *);
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void rt_setup(pool *, rtable *, char *);
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net *net_find(rtable *tab, unsigned tos, ip_addr addr, unsigned len);
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net *net_get(rtable *tab, unsigned tos, ip_addr addr, unsigned len);
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rte *rte_find(net *net, struct proto *p);
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@ -38,10 +38,10 @@ rte_init(struct fib_node *N)
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}
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void
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rt_setup(rtable *t, char *name)
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rt_setup(pool *p, rtable *t, char *name)
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{
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bzero(t, sizeof(*t));
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fib_init(&t->fib, &root_pool, sizeof(rte), 0, rte_init);
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fib_init(&t->fib, p, sizeof(rte), 0, rte_init);
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t->name = name;
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}
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@ -67,7 +67,7 @@ net_get(rtable *tab, unsigned tos, ip_addr mask, unsigned len)
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while (tab->sibling)
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tab = tab->sibling;
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t = mb_alloc(&root_pool, sizeof(rtable));
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rt_setup(t, NULL);
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rt_setup(&root_pool, t, NULL); /* FIXME: Either delete all the TOS logic or use the right pool */
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tab->sibling = t;
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t->tos = tos;
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}
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@ -305,10 +305,10 @@ rte_dump(rte *e)
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debug("%1I/%2d ", n->n.prefix, n->n.pxlen);
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else
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debug("??? ");
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debug("PF=%02x pref=%d lm=%d ", e->pflags, e->pref, now-e->lastmod);
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debug("KF=%02x PF=%02x pref=%d lm=%d ", n->n.flags, e->pflags, e->pref, now-e->lastmod);
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rta_dump(e->attrs);
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if (e->flags & REF_CHOSEN)
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debug(" [*]");
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if (e->attrs->proto->proto->dump_attrs)
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e->attrs->proto->proto->dump_attrs(e);
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debug("\n");
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}
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@ -357,7 +357,7 @@ rt_init(void)
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{
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rta_init();
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rt_table_pool = rp_new(&root_pool, "Routing tables");
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rt_setup(&master_table, "master");
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rt_setup(rt_table_pool, &master_table, "master");
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rte_slab = sl_new(rt_table_pool, sizeof(rte));
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rt_last_gc = now;
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rt_gc_event = ev_new(rt_table_pool);
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@ -127,7 +127,7 @@ krt_parse_entry(byte *ent, struct krt_proto *p)
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e = rte_get_temp(&a);
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e->net = net;
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e->u.krt_sync.src = KRT_SRC_UNKNOWN;
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e->u.krt.src = KRT_SRC_UNKNOWN;
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krt_got_route(p, e);
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}
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@ -276,7 +276,7 @@ nl_parse_link(struct nlmsghdr *h, int scan)
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ifi = if_find_by_index(i->ifi_index);
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if (!new)
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{
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DBG("KRT: IF%d(%s) goes down\n", i->ifi_index, name);
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DBG("KIF: IF%d(%s) goes down\n", i->ifi_index, name);
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if (ifi && !scan)
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{
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memcpy(&f, ifi, sizeof(struct iface));
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@ -286,7 +286,7 @@ nl_parse_link(struct nlmsghdr *h, int scan)
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}
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else
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{
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DBG("KRT: IF%d(%s) goes up (mtu=%d,flg=%x)\n", i->ifi_index, name, mtu, i->ifi_flags);
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DBG("KIF: IF%d(%s) goes up (mtu=%d,flg=%x)\n", i->ifi_index, name, mtu, i->ifi_flags);
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if (ifi)
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memcpy(&f, ifi, sizeof(f));
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else
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@ -332,14 +332,14 @@ nl_parse_addr(struct nlmsghdr *h)
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}
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if (i->ifa_flags & IFA_F_SECONDARY)
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{
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DBG("KRT: Received address message for secondary address which is not supported.\n"); /* FIXME */
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DBG("KIF: Received address message for secondary address which is not supported.\n"); /* FIXME */
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return;
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}
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ifi = if_find_by_index(i->ifa_index);
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if (!ifi)
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{
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log(L_ERR "KRT: Received address message for unknown interface %d\n", i->ifa_index);
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log(L_ERR "KIF: Received address message for unknown interface %d\n", i->ifa_index);
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return;
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}
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memcpy(&f, ifi, sizeof(f));
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@ -347,14 +347,14 @@ nl_parse_addr(struct nlmsghdr *h)
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if (i->ifa_prefixlen > 32 || i->ifa_prefixlen == 31 ||
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(f.flags & IF_UNNUMBERED) && i->ifa_prefixlen != 32)
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{
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log(L_ERR "KRT: Invalid prefix length for interface %s: %d\n", f.name, i->ifa_prefixlen);
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log(L_ERR "KIF: Invalid prefix length for interface %s: %d\n", f.name, i->ifa_prefixlen);
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new = 0;
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}
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f.ip = f.brd = f.opposite = IPA_NONE;
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if (!new)
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{
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DBG("KRT: IF%d IP address deleted\n");
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DBG("KIF: IF%d IP address deleted\n");
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f.pxlen = 0;
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}
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else
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@ -374,7 +374,7 @@ nl_parse_addr(struct nlmsghdr *h)
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}
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/* else a NBMA link */
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f.prefix = ipa_and(f.ip, ipa_mkmask(f.pxlen));
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DBG("KRT: IF%d IP address set to %I, net %I/%d, brd %I, opp %I\n", f.index, f.ip, f.prefix, f.pxlen, f.brd, f.opposite);
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DBG("KIF: IF%d IP address set to %I, net %I/%d, brd %I, opp %I\n", f.index, f.ip, f.prefix, f.pxlen, f.brd, f.opposite);
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}
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if_update(&f);
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}
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@ -485,12 +485,8 @@ nl_send_route(rte *e, int new)
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}
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void
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krt_set_notify(struct proto *p, net *n, rte *new, rte *old)
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krt_set_notify(struct krt_proto *p, net *n, rte *new, rte *old)
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{
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if (old && !krt_capable(old))
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old = NULL;
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if (new && !krt_capable(new))
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new = NULL;
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if (old && new && old->attrs->tos == new->attrs->tos)
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{
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/* FIXME: Priorities should be identical as well, but we don't use them yet. */
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@ -546,6 +542,7 @@ nl_parse_route(struct krt_proto *p, struct nlmsghdr *h, int scan)
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return;
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if ((a[RTA_DST] && RTA_PAYLOAD(a[RTA_DST]) != sizeof(ip_addr)) ||
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(a[RTA_OIF] && RTA_PAYLOAD(a[RTA_OIF]) != 4) ||
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(a[RTA_PRIORITY] && RTA_PAYLOAD(a[RTA_PRIORITY]) != 4) ||
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(a[RTA_GATEWAY] && RTA_PAYLOAD(a[RTA_GATEWAY]) != sizeof(ip_addr)))
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{
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log(L_ERR "nl_parse_route: Malformed message received");
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@ -649,9 +646,22 @@ nl_parse_route(struct krt_proto *p, struct nlmsghdr *h, int scan)
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DBG("KRT: Ignoring route with type=%d\n", i->rtm_type);
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return;
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}
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if (i->rtm_scope != RT_SCOPE_UNIVERSE) /* FIXME: Other scopes? */
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{
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DBG("KRT: Ignoring route with scope=%d\n", i->rtm_scope);
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return;
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}
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e = rte_get_temp(&ra);
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e->net = net;
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e->u.krt_sync.src = src;
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e->u.krt.src = src;
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e->u.krt.proto = i->rtm_protocol;
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e->u.krt.type = i->rtm_type;
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if (a[RTA_PRIORITY])
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memcpy(&e->u.krt.metric, RTA_DATA(a[RTA_PRIORITY]), sizeof(e->u.krt.metric));
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else
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e->u.krt.metric = 0;
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if (scan)
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krt_got_route(p, e);
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else
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@ -797,7 +807,7 @@ krt_scan_start(struct krt_proto *p)
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{
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init_list(&p->scan.temp_ifs);
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nl_open();
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if (KRT_CF->scan.async)
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if (KRT_CF->scan.async) /* FIXME: Async is for debugging only. Get rid of it some day. */
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nl_open_async(p);
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}
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@ -810,4 +820,5 @@ void
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krt_if_start(struct kif_proto *p)
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{
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nl_open();
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/* FIXME: nl_open_async() after scan.async is gone */
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}
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@ -77,41 +77,19 @@ krt_ioctl(int ioc, rte *e, char *name)
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log(L_ERR "%s(%I/%d): %m", name, net->n.prefix, net->n.pxlen);
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}
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static inline void
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krt_remove_route(rte *old)
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{
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net *net = old->net;
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if (!krt_capable(old))
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{
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DBG("krt_remove_route(ignored %I/%d)\n", net->n.prefix, net->n.pxlen);
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return;
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}
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DBG("krt_remove_route(%I/%d)\n", net->n.prefix, net->n.pxlen);
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krt_ioctl(SIOCDELRT, old, "SIOCDELRT");
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}
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static inline void
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krt_add_route(rte *new)
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{
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net *net = new->net;
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if (!krt_capable(new))
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{
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DBG("krt_add_route(ignored %I/%d)\n", net->n.prefix, net->n.pxlen);
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return;
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}
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DBG("krt_add_route(%I/%d)\n", net->n.prefix, net->n.pxlen);
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krt_ioctl(SIOCADDRT, new, "SIOCADDRT");
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}
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void
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krt_set_notify(struct proto *x, net *net, rte *new, rte *old)
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krt_set_notify(struct krt_proto *p, net *net, rte *new, rte *old)
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{
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if (old)
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krt_remove_route(old);
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{
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DBG("krt_remove_route(%I/%d)\n", net->n.prefix, net->n.pxlen);
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krt_ioctl(SIOCDELRT, old, "SIOCDELRT");
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}
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if (new)
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krt_add_route(new);
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{
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DBG("krt_add_route(%I/%d)\n", net->n.prefix, net->n.pxlen);
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krt_ioctl(SIOCADDRT, new, "SIOCADDRT");
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}
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}
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void
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@ -45,7 +45,13 @@ kern_item:
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/* Scan time of 0 means scan on startup only */
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THIS_KRT->scan_time = $3;
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}
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| LEARN bool { THIS_KRT->learn = $2; }
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| LEARN bool {
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THIS_KRT->learn = $2;
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#ifndef KRT_ALLOW_LEARN
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if ($2)
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cf_error("Learning of kernel routes not supported in this configuration");
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#endif
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}
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;
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/* Kernel interface protocol */
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@ -17,6 +17,8 @@
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#include "unix.h"
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#include "krt.h"
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static int krt_uptodate(rte *k, rte *e);
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/*
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* Global resources
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*/
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@ -106,6 +108,247 @@ struct protocol proto_unix_iface = {
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shutdown: kif_shutdown,
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};
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/*
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* Inherited Routes
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*/
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#ifdef KRT_ALLOW_LEARN
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static inline int
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krt_same_key(rte *a, rte *b)
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{
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return a->u.krt.proto == b->u.krt.proto &&
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a->u.krt.metric == b->u.krt.metric &&
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a->u.krt.type == b->u.krt.type;
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}
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static void
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krt_learn_announce_update(struct krt_proto *p, rte *e)
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{
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net *n = e->net;
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rta *aa = rta_clone(e->attrs);
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rte *ee = rte_get_temp(aa);
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net *nn = net_get(p->p.table, 0, n->n.prefix, n->n.pxlen); /* FIXME: TOS */
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ee->net = nn;
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ee->pflags = 0;
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ee->u.krt = e->u.krt;
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rte_update(nn, &p->p, ee);
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}
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static void
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krt_learn_announce_delete(struct krt_proto *p, net *n)
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{
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n = net_find(p->p.table, 0, n->n.prefix, n->n.pxlen); /* FIXME: TOS */
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if (n)
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rte_update(n, &p->p, NULL);
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}
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static void
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krt_learn_scan(struct krt_proto *p, rte *e)
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{
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net *n0 = e->net;
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net *n = net_get(&p->krt_table, 0, n0->n.prefix, n0->n.pxlen); /* FIXME: TOS */
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rte *m, **mm;
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e->attrs->source = RTS_INHERIT;
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for(mm=&n->routes; m = *mm; mm=&m->next)
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if (krt_same_key(m, e))
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break;
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if (m)
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{
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if (krt_uptodate(m, e))
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{
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DBG("krt_learn_scan: SEEN\n");
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rte_free(e);
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m->u.krt.seen = 1;
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}
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else
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{
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DBG("krt_learn_scan: OVERRIDE\n");
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*mm = m->next;
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rte_free(m);
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m = NULL;
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}
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}
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else
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DBG("krt_learn_scan: CREATE\n");
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if (!m)
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{
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e->attrs = rta_lookup(e->attrs);
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e->next = n->routes;
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n->routes = e;
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e->u.krt.seen = 1;
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}
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}
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/* FIXME: Add dump function */
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static void
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krt_learn_prune(struct krt_proto *p)
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{
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struct fib *fib = &p->krt_table.fib;
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struct fib_iterator fit;
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DBG("Pruning inheritance data...\n");
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FIB_ITERATE_INIT(&fit, fib);
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again:
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FIB_ITERATE_START(fib, &fit, f)
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{
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net *n = (net *) f;
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rte *e, **ee, *best, **pbest, *old_best;
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old_best = n->routes;
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best = NULL;
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pbest = NULL;
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ee = &n->routes;
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while (e = *ee)
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{
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if (!e->u.krt.seen)
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{
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*ee = e->next;
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rte_free(e);
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continue;
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}
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if (!best || best->u.krt.metric > e->u.krt.metric)
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{
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best = e;
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pbest = ee;
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}
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e->u.krt.seen = 0;
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ee = &e->next;
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}
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if (!n->routes)
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{
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DBG("%I/%d: deleting\n", n->n.prefix, n->n.pxlen);
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if (old_best)
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{
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krt_learn_announce_delete(p, n);
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n->n.flags &= ~KRF_INSTALLED;
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}
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FIB_ITERATE_PUT(&fit, f);
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fib_delete(fib, f);
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goto again;
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}
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*pbest = best->next;
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best->next = n->routes;
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n->routes = best;
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if (best != old_best || !(n->n.flags & KRF_INSTALLED))
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{
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DBG("%I/%d: announcing (metric=%d)\n", n->n.prefix, n->n.pxlen, best->u.krt.metric);
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krt_learn_announce_update(p, best);
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n->n.flags |= KRF_INSTALLED;
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}
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else
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DBG("%I/%d: uptodate (metric=%d)\n", n->n.prefix, n->n.pxlen, best->u.krt.metric);
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}
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FIB_ITERATE_END(f);
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}
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static void
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krt_learn_async(struct krt_proto *p, rte *e, int new)
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{
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net *n0 = e->net;
|
||||
net *n = net_get(&p->krt_table, 0, n0->n.prefix, n0->n.pxlen); /* FIXME: TOS */
|
||||
rte *g, **gg, *best, **bestp, *old_best;
|
||||
|
||||
e->attrs->source = RTS_INHERIT;
|
||||
|
||||
old_best = n->routes;
|
||||
for(gg=&n->routes; g = *gg; gg = &g->next)
|
||||
if (krt_same_key(g, e))
|
||||
break;
|
||||
if (new)
|
||||
{
|
||||
if (g)
|
||||
{
|
||||
if (krt_uptodate(g, e))
|
||||
{
|
||||
DBG("krt_learn_async: same\n");
|
||||
rte_free(e);
|
||||
return;
|
||||
}
|
||||
DBG("krt_learn_async: update\n");
|
||||
*gg = g->next;
|
||||
rte_free(g);
|
||||
}
|
||||
else
|
||||
DBG("krt_learn_async: create\n");
|
||||
e->attrs = rta_lookup(e->attrs);
|
||||
e->next = n->routes;
|
||||
n->routes = e;
|
||||
}
|
||||
else if (!g)
|
||||
{
|
||||
DBG("krt_learn_async: not found\n");
|
||||
rte_free(e);
|
||||
return;
|
||||
}
|
||||
else
|
||||
{
|
||||
DBG("krt_learn_async: delete\n");
|
||||
*gg = g->next;
|
||||
rte_free(e);
|
||||
rte_free(g);
|
||||
}
|
||||
best = n->routes;
|
||||
bestp = &n->routes;
|
||||
for(gg=&n->routes; g=*gg; gg=&g->next)
|
||||
if (best->u.krt.metric > g->u.krt.metric)
|
||||
{
|
||||
best = g;
|
||||
bestp = gg;
|
||||
}
|
||||
if (best)
|
||||
{
|
||||
*bestp = best->next;
|
||||
best->next = n->routes;
|
||||
n->routes = best;
|
||||
}
|
||||
if (best != old_best)
|
||||
{
|
||||
DBG("krt_learn_async: distributing change\n");
|
||||
if (best)
|
||||
{
|
||||
krt_learn_announce_update(p, best);
|
||||
n->n.flags |= KRF_INSTALLED;
|
||||
}
|
||||
else
|
||||
{
|
||||
n->routes = NULL;
|
||||
krt_learn_announce_delete(p, n);
|
||||
n->n.flags &= ~KRF_INSTALLED;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
krt_learn_init(struct krt_proto *p)
|
||||
{
|
||||
if (KRT_CF->learn)
|
||||
rt_setup(p->p.pool, &p->krt_table, "Inherited");
|
||||
}
|
||||
|
||||
static void
|
||||
krt_dump(struct proto *P)
|
||||
{
|
||||
struct krt_proto *p = (struct krt_proto *) P;
|
||||
|
||||
if (!KRT_CF->learn)
|
||||
return;
|
||||
debug("KRT: Table of inheritable routes\n");
|
||||
rt_dump(&p->krt_table);
|
||||
}
|
||||
|
||||
static void
|
||||
krt_dump_attrs(rte *e)
|
||||
{
|
||||
debug(" [m=%d,p=%d,t=%d]", e->u.krt.metric, e->u.krt.proto, e->u.krt.type);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Routes
|
||||
*/
|
||||
@ -128,13 +371,12 @@ krt_flush_routes(struct krt_proto *p)
|
||||
{
|
||||
rta *a = e->attrs;
|
||||
if (a->source != RTS_DEVICE && a->source != RTS_INHERIT)
|
||||
krt_set_notify(&p->p, e->net, NULL, e);
|
||||
krt_set_notify(p, e->net, NULL, e);
|
||||
}
|
||||
}
|
||||
FIB_WALK_END;
|
||||
}
|
||||
|
||||
/* FIXME: Inbound/outbound route filtering? */
|
||||
/* FIXME: Synchronization of multiple routing tables? */
|
||||
|
||||
static int
|
||||
@ -165,41 +407,53 @@ krt_got_route(struct krt_proto *p, rte *e)
|
||||
{
|
||||
rte *old;
|
||||
net *net = e->net;
|
||||
int src = e->u.krt_sync.src;
|
||||
int src = e->u.krt.src;
|
||||
int verdict;
|
||||
|
||||
if (net->n.flags)
|
||||
#ifdef CONFIG_AUTO_ROUTES
|
||||
if (e->attrs->dest == RTD_DEVICE)
|
||||
{
|
||||
/* It's a device route. Probably a kernel-generated one. */
|
||||
verdict = KRF_IGNORE;
|
||||
goto sentenced;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef KRT_ALLOW_LEARN
|
||||
if (src == KRT_SRC_ALIEN)
|
||||
{
|
||||
if (KRT_CF->learn)
|
||||
krt_learn_scan(p, e);
|
||||
else
|
||||
DBG("krt_parse_entry: Alien route, ignoring\n");
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
if (net->n.flags & KRF_VERDICT_MASK)
|
||||
{
|
||||
/* Route to this destination was already seen. Strange, but it happens... */
|
||||
DBG("Already seen.\n");
|
||||
return;
|
||||
}
|
||||
|
||||
if (old = net->routes)
|
||||
if (net->n.flags & KRF_INSTALLED)
|
||||
{
|
||||
if (!krt_capable(old))
|
||||
{
|
||||
#ifdef CONFIG_AUTO_ROUTES
|
||||
if (old->attrs->source == RTS_DEVICE)
|
||||
verdict = KRF_SEEN;
|
||||
else
|
||||
#endif
|
||||
verdict = krt_capable(e) ? KRF_DELETE : KRF_SEEN;
|
||||
}
|
||||
else if (krt_uptodate(e, net->routes))
|
||||
old = net->routes;
|
||||
ASSERT(old);
|
||||
if (krt_uptodate(e, old))
|
||||
verdict = KRF_SEEN;
|
||||
else
|
||||
verdict = KRF_UPDATE;
|
||||
}
|
||||
else if (KRT_CF->learn && !net->routes && (src == KRT_SRC_ALIEN || src < 0))
|
||||
verdict = KRF_LEARN;
|
||||
else
|
||||
verdict = KRF_DELETE;
|
||||
|
||||
DBG("krt_parse_entry: verdict=%s\n", ((char *[]) { "CREATE", "SEEN", "UPDATE", "DELETE", "LEARN" }) [verdict]);
|
||||
sentenced:
|
||||
DBG("krt_parse_entry: verdict=%s\n", ((char *[]) { "CREATE", "SEEN", "UPDATE", "DELETE", "IGNORE" }) [verdict]);
|
||||
|
||||
net->n.flags = verdict;
|
||||
if (verdict != KRF_SEEN)
|
||||
net->n.flags = (net->n.flags & ~KRF_VERDICT_MASK) | verdict;
|
||||
if (verdict == KRF_UPDATE || verdict == KRF_DELETE)
|
||||
{
|
||||
/* Get a cached copy of attributes and link the route */
|
||||
rta *a = e->attrs;
|
||||
@ -227,10 +481,10 @@ krt_prune(struct krt_proto *p)
|
||||
FIB_WALK(&t->fib, f)
|
||||
{
|
||||
net *n = (net *) f;
|
||||
int verdict = f->flags;
|
||||
int verdict = f->flags & KRF_VERDICT_MASK;
|
||||
rte *new, *old;
|
||||
|
||||
if (verdict != KRF_CREATE && verdict != KRF_SEEN)
|
||||
if (verdict != KRF_CREATE && verdict != KRF_SEEN && verdict != KRF_IGNORE)
|
||||
{
|
||||
old = n->routes;
|
||||
n->routes = old->next;
|
||||
@ -242,44 +496,37 @@ krt_prune(struct krt_proto *p)
|
||||
switch (verdict)
|
||||
{
|
||||
case KRF_CREATE:
|
||||
if (new)
|
||||
if (new && (f->flags & KRF_INSTALLED))
|
||||
{
|
||||
if (new->attrs->source == RTS_INHERIT)
|
||||
{
|
||||
DBG("krt_prune: removing inherited %I/%d\n", n->n.prefix, n->n.pxlen);
|
||||
rte_update(n, pp, NULL);
|
||||
}
|
||||
else if (krt_capable(new))
|
||||
{
|
||||
DBG("krt_prune: reinstalling %I/%d\n", n->n.prefix, n->n.pxlen);
|
||||
krt_set_notify(pp, n, new, NULL);
|
||||
}
|
||||
DBG("krt_prune: reinstalling %I/%d\n", n->n.prefix, n->n.pxlen);
|
||||
krt_set_notify(p, n, new, NULL);
|
||||
}
|
||||
break;
|
||||
case KRF_SEEN:
|
||||
case KRF_IGNORE:
|
||||
/* Nothing happens */
|
||||
break;
|
||||
case KRF_UPDATE:
|
||||
DBG("krt_prune: updating %I/%d\n", n->n.prefix, n->n.pxlen);
|
||||
krt_set_notify(pp, n, new, old);
|
||||
krt_set_notify(p, n, new, old);
|
||||
break;
|
||||
case KRF_DELETE:
|
||||
DBG("krt_prune: deleting %I/%d\n", n->n.prefix, n->n.pxlen);
|
||||
krt_set_notify(pp, n, NULL, old);
|
||||
break;
|
||||
case KRF_LEARN:
|
||||
DBG("krt_prune: learning %I/%d\n", n->n.prefix, n->n.pxlen);
|
||||
rte_update(n, pp, new);
|
||||
krt_set_notify(p, n, NULL, old);
|
||||
break;
|
||||
default:
|
||||
bug("krt_prune: invalid route status");
|
||||
}
|
||||
|
||||
if (old)
|
||||
rte_free(old);
|
||||
f->flags = 0;
|
||||
f->flags &= ~KRF_VERDICT_MASK;
|
||||
}
|
||||
FIB_WALK_END;
|
||||
|
||||
#ifdef KRT_ALLOW_LEARN
|
||||
if (KRT_CF->learn)
|
||||
krt_learn_prune(p);
|
||||
#endif
|
||||
}
|
||||
|
||||
void
|
||||
@ -287,7 +534,7 @@ krt_got_route_async(struct krt_proto *p, rte *e, int new)
|
||||
{
|
||||
net *net = e->net;
|
||||
rte *old = net->routes;
|
||||
int src = e->u.krt_sync.src;
|
||||
int src = e->u.krt.src;
|
||||
|
||||
switch (src)
|
||||
{
|
||||
@ -295,26 +542,22 @@ krt_got_route_async(struct krt_proto *p, rte *e, int new)
|
||||
ASSERT(0);
|
||||
case KRT_SRC_REDIRECT:
|
||||
DBG("It's a redirect, kill him! Kill! Kill!\n");
|
||||
krt_set_notify(&p->p, net, NULL, e);
|
||||
krt_set_notify(p, net, NULL, e);
|
||||
break;
|
||||
default: /* Alien or unspecified */
|
||||
if (KRT_CF->learn && new)
|
||||
case KRT_SRC_ALIEN:
|
||||
#ifdef KRT_ALLOW_LEARN
|
||||
if (KRT_CF->learn)
|
||||
{
|
||||
/*
|
||||
* FIXME: This is limited to one inherited route per destination as we
|
||||
* use single protocol for all inherited routes. Probably leave it
|
||||
* as-is (and document it :)), because the correct solution is to
|
||||
* use multiple kernel tables anyway.
|
||||
*/
|
||||
DBG("Learning\n");
|
||||
rte_update(net, &p->p, e);
|
||||
}
|
||||
else
|
||||
{
|
||||
DBG("Discarding\n");
|
||||
rte_update(net, &p->p, NULL);
|
||||
krt_learn_async(p, e, new);
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
/* Fall-thru */
|
||||
default:
|
||||
DBG("Discarding\n");
|
||||
rte_update(net, &p->p, NULL);
|
||||
}
|
||||
rte_free(e);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -334,6 +577,26 @@ krt_scan(timer *t)
|
||||
krt_prune(p);
|
||||
}
|
||||
|
||||
/*
|
||||
* Updates
|
||||
*/
|
||||
|
||||
static void
|
||||
krt_notify(struct proto *P, net *net, rte *new, rte *old)
|
||||
{
|
||||
struct krt_proto *p = (struct krt_proto *) P;
|
||||
|
||||
if (new && (!krt_capable(new) || new->attrs->source == RTS_INHERIT))
|
||||
new = NULL;
|
||||
if (!(net->n.flags & KRF_INSTALLED))
|
||||
old = NULL;
|
||||
if (new)
|
||||
net->n.flags |= KRF_INSTALLED;
|
||||
else
|
||||
net->n.flags &= ~KRF_INSTALLED;
|
||||
krt_set_notify(p, net, new, old);
|
||||
}
|
||||
|
||||
/*
|
||||
* Protocol glue
|
||||
*/
|
||||
@ -345,6 +608,10 @@ krt_start(struct proto *P)
|
||||
{
|
||||
struct krt_proto *p = (struct krt_proto *) P;
|
||||
|
||||
#ifdef KRT_ALLOW_LEARN
|
||||
krt_learn_init(p);
|
||||
#endif
|
||||
|
||||
krt_scan_start(p);
|
||||
krt_set_start(p);
|
||||
|
||||
@ -380,7 +647,7 @@ krt_init(struct proto_config *c)
|
||||
{
|
||||
struct krt_proto *p = proto_new(c, sizeof(struct krt_proto));
|
||||
|
||||
p->p.rt_notify = krt_set_notify;
|
||||
p->p.rt_notify = krt_notify;
|
||||
return &p->p;
|
||||
}
|
||||
|
||||
@ -390,4 +657,8 @@ struct protocol proto_unix_kernel = {
|
||||
init: krt_init,
|
||||
start: krt_start,
|
||||
shutdown: krt_shutdown,
|
||||
#ifdef KRT_ALLOW_LEARN
|
||||
dump: krt_dump,
|
||||
dump_attrs: krt_dump_attrs,
|
||||
#endif
|
||||
};
|
||||
|
||||
@ -20,11 +20,20 @@ struct kif_proto;
|
||||
|
||||
/* Flags stored in net->n.flags */
|
||||
|
||||
#define KRF_VERDICT_MASK 0x0f
|
||||
#define KRF_CREATE 0 /* Not seen in kernel table */
|
||||
#define KRF_SEEN 1 /* Seen in kernel table during last scan */
|
||||
#define KRF_UPDATE 2 /* Need to update this entry */
|
||||
#define KRF_DELETE 3 /* Should be deleted */
|
||||
#define KRF_LEARN 4 /* We should learn this route */
|
||||
#define KRF_IGNORE 4 /* To be ignored */
|
||||
|
||||
#define KRF_INSTALLED 0x80 /* This route should be installed in the kernel */
|
||||
|
||||
/* Whenever we recognize our own routes, we allow learing of foreign routes */
|
||||
|
||||
#ifdef CONFIG_SELF_CONSCIOUS
|
||||
#define KRT_ALLOW_LEARN
|
||||
#endif
|
||||
|
||||
/* krt.c */
|
||||
|
||||
@ -45,6 +54,9 @@ struct krt_proto {
|
||||
struct krt_set_status set;
|
||||
struct krt_scan_status scan;
|
||||
struct krt_if_status iface;
|
||||
#ifdef KRT_ALLOW_LEARN
|
||||
struct rtable krt_table; /* Internal table of inherited routes */
|
||||
#endif
|
||||
};
|
||||
|
||||
extern struct proto_config *cf_krt;
|
||||
@ -92,7 +104,7 @@ void krt_set_start(struct krt_proto *);
|
||||
void krt_set_shutdown(struct krt_proto *);
|
||||
|
||||
int krt_capable(rte *e);
|
||||
void krt_set_notify(struct proto *x, net *net, rte *new, rte *old);
|
||||
void krt_set_notify(struct krt_proto *x, net *net, rte *new, rte *old);
|
||||
|
||||
/* krt-iface.c */
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user