--- /dev/null
+/*
+ * BIRD -- Table-to-Table Routing Protocol a.k.a Pipe
+ *
+ * (c) 1999--2000 Martin Mares <mj@ucw.cz>
+ *
+ * Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+/**
+ * DOC: Pipe
+ *
+ * The Pipe protocol is very simple. It just connects to two routing tables
+ * using proto_add_announce_hook() and whenever it receives a rt_notify()
+ * about a change in one of the tables, it converts it to a rte_update()
+ * in the other one.
+ *
+ * To avoid pipe loops, Pipe keeps a `being updated' flag in each routing
+ * table.
+ *
+ * A pipe has two announce hooks, the first connected to the main
+ * table, the second connected to the peer table. When a new route is
+ * announced on the main table, it gets checked by an export filter in
+ * ahook 1, and, after that, it is announced to the peer table via
+ * rte_update(), an import filter in ahook 2 is called. When a new
+ * route is announced in the peer table, an export filter in ahook2
+ * and an import filter in ahook 1 are used. Oviously, there is no
+ * need in filtering the same route twice, so both import filters are
+ * set to accept, while user configured 'import' and 'export' filters
+ * are used as export filters in ahooks 2 and 1. Route limits are
+ * handled similarly, but on the import side of ahooks.
+ */
+
+#undef LOCAL_DEBUG
+
+#include "nest/bird.h"
+#include "nest/iface.h"
+#include "nest/protocol.h"
+#include "nest/rt.h"
+#include "nest/cli.h"
+#include "conf/conf.h"
+#include "filter/filter.h"
+#include "lib/string.h"
+
+#include "stats.h"
+
+#ifdef CONFIG_BGP
+#include "proto/bgp/bgp.h"
+#endif
+
+static void
+stats_rt_notify(struct proto *P, struct channel *src_ch, const net_addr *n, rte *new, const rte *old)
+{
+ struct stats_proto *p = (void *) P;
+ struct channel *dst = (src_ch == p->pri) ? p->sec : p->pri;
+
+ if (!new && !old)
+ return;
+
+ if (new)
+ {
+ rte e0 = {
+ .attrs = new->attrs,
+ .src = new->src,
+ .generation = new->generation + 1,
+ };
+
+ ea_unset_attr(&e0.attrs, 0, &ea_gen_hostentry);
+
+ rte_update(dst, n, &e0, new->src);
+ }
+ else
+ rte_update(dst, n, NULL, old->src);
+}
+
+static int
+stats_preexport(struct channel *c, rte *e)
+{
+ struct stats_proto *p = (void *) c->proto;
+
+ /* Avoid direct loopbacks */
+ if (e->sender == c->in_req.hook)
+ return -1;
+
+ /* Indirection check */
+ uint max_generation = ((struct stats_config *) p->p.cf)->max_generation;
+ if (e->generation >= max_generation)
+ {
+ log_rl(&p->rl_gen, L_ERR "Route overpiped (%u hops of %u configured in %s) in table %s: %N %s/%u:%u",
+ e->generation, max_generation, c->proto->name,
+ c->table->name, e->net, e->src->proto->name, e->src->private_id, e->src->global_id);
+
+ return -1;
+ }
+
+ return 0;
+}
+
+static void
+stats_reload_routes(struct channel *C)
+{
+ struct stats_proto *p = (void *) C->proto;
+
+ /* Route reload on one channel is just refeed on the other */
+ channel_request_feeding((C == p->pri) ? p->sec : p->pri);
+}
+
+
+static void
+stats_postconfig(struct proto_config *CF)
+{
+ struct stats_config *cf = (void *) CF;
+ struct channel_config *cc = proto_cf_main_channel(CF);
+
+ if (!cc->table)
+ cf_error("Primary routing table not specified");
+
+ if (!cf->peer)
+ cf_error("Secondary routing table not specified");
+
+ if (cc->table == cf->peer)
+ cf_error("Primary table and peer table must be different");
+
+ if (cc->table->addr_type != cf->peer->addr_type)
+ cf_error("Primary table and peer table must have the same type");
+
+ if (cc->out_subprefix && (cc->table->addr_type != cc->out_subprefix->type))
+ cf_error("Export subprefix must match table type");
+
+ if (cf->in_subprefix && (cc->table->addr_type != cf->in_subprefix->type))
+ cf_error("Import subprefix must match table type");
+
+ if (cc->rx_limit.action)
+ cf_error("Pipe protocol does not support receive limits");
+
+ if (cc->in_keep)
+ cf_error("Pipe protocol prohibits keeping filtered routes");
+
+ cc->debug = cf->c.debug;
+}
+
+static int
+stats_configure_channels(struct stats_proto *s, struct stats_config *cf)
+{
+ struct channel_config *cc = proto_cf_main_channel(&cf->c);
+
+ struct channel_config pri_cf = {
+ .name = "pri",
+ .channel = cc->channel,
+ .table = cc->table,
+ .out_filter = cc->out_filter,
+ .out_subprefix = cc->out_subprefix,
+ .in_limit = cc->in_limit,
+ .ra_mode = RA_ANY,
+ .debug = cc->debug,
+ .rpki_reload = cc->rpki_reload,
+ };
+
+ struct channel_config sec_cf = {
+ .name = "sec",
+ .channel = cc->channel,
+ .table = cf->peer,
+ .out_filter = cc->in_filter,
+ .out_subprefix = cf->in_subprefix,
+ .in_limit = cc->out_limit,
+ .ra_mode = RA_ANY,
+ .debug = cc->debug,
+ .rpki_reload = cc->rpki_reload,
+ };
+
+ return
+ proto_configure_channel(&s->p, &s->pri, &pri_cf) &&
+ proto_configure_channel(&s->p, &s->sec, &sec_cf);
+}
+
+static struct proto *
+stats_init(struct proto_config *CF)
+{
+ struct proto *P = proto_new(CF);
+ struct stats_proto *p = (void *) P;
+ struct stats_config *cf = (void *) CF;
+
+ P->rt_notify = stats_rt_notify;
+ P->preexport = stats_preexport;
+ P->reload_routes = stats_reload_routes;
+
+ p->rl_gen = (struct tbf) TBF_DEFAULT_LOG_LIMITS;
+
+ stats_configure_channels(p, cf);
+
+ return P;
+}
+
+static int
+stats_reconfigure(struct proto *P, struct proto_config *CF)
+{
+ struct stats_proto *p = (void *) P;
+ struct stats_config *cf = (void *) CF;
+
+ return stats_configure_channels(p, cf);
+}
+
+static void
+stats_copy_config(struct proto_config *dest UNUSED, struct proto_config *src UNUSED)
+{
+ /* Just a shallow copy, not many items here */
+}
+
+static void
+stats_get_status(struct proto *P, byte *buf)
+{
+ struct stats_proto *p = (void *) P;
+
+ bsprintf(buf, "%s <=> %s", p->pri->table->name, p->sec->table->name);
+}
+
+static void
+stats_show_stats(struct stats_proto *p)
+{
+ struct channel_import_stats *s1i = &p->pri->import_stats;
+ struct channel_export_stats *s1e = &p->pri->export_stats;
+ struct channel_import_stats *s2i = &p->sec->import_stats;
+ struct channel_export_stats *s2e = &p->sec->export_stats;
+
+ struct rt_import_stats *rs1i = p->pri->in_req.hook ? &p->pri->in_req.hook->stats : NULL;
+ struct rt_export_stats *rs1e = p->pri->out_req.hook ? &p->pri->out_req.hook->stats : NULL;
+ struct rt_import_stats *rs2i = p->sec->in_req.hook ? &p->sec->in_req.hook->stats : NULL;
+ struct rt_export_stats *rs2e = p->sec->out_req.hook ? &p->sec->out_req.hook->stats : NULL;
+
+ u32 pri_routes = p->pri->in_limit.count;
+ u32 sec_routes = p->sec->in_limit.count;
+
+ /*
+ * Pipe stats (as anything related to pipes) are a bit tricky. There
+ * are two sets of stats - s1 for ahook to the primary routing and
+ * s2 for the ahook to the secondary routing table. The user point
+ * of view is that routes going from the primary routing table to
+ * the secondary routing table are 'exported', while routes going in
+ * the other direction are 'imported'.
+ *
+ * Each route going through a pipe is, technically, first exported
+ * to the pipe and then imported from that pipe and such operations
+ * are counted in one set of stats according to the direction of the
+ * route propagation. Filtering is done just in the first part
+ * (export). Therefore, we compose stats for one directon for one
+ * user direction from both import and export stats, skipping
+ * immediate and irrelevant steps (exp_updates_accepted,
+ * imp_updates_received, imp_updates_filtered, ...).
+ *
+ * Rule of thumb is that stats s1 have the correct 'polarity'
+ * (imp/exp), while stats s2 have switched 'polarity'.
+ */
+
+ cli_msg(-1006, " Routes: %u imported, %u exported",
+ pri_routes, sec_routes);
+ cli_msg(-1006, " Route change stats: received rejected filtered ignored accepted");
+ cli_msg(-1006, " Import updates: %10u %10u %10u %10u %10u",
+ rs2e->updates_received, s2e->updates_rejected + s1i->updates_invalid,
+ s2e->updates_filtered, rs1i->updates_ignored, rs1i->updates_accepted);
+ cli_msg(-1006, " Import withdraws: %10u %10u --- %10u %10u",
+ rs2e->withdraws_received, s1i->withdraws_invalid,
+ rs1i->withdraws_ignored, rs1i->withdraws_accepted);
+ cli_msg(-1006, " Export updates: %10u %10u %10u %10u %10u",
+ rs1e->updates_received, s1e->updates_rejected + s2i->updates_invalid,
+ s1e->updates_filtered, rs2i->updates_ignored, rs2i->updates_accepted);
+ cli_msg(-1006, " Export withdraws: %10u %10u --- %10u %10u",
+ rs1e->withdraws_received, s2i->withdraws_invalid,
+ rs2i->withdraws_ignored, rs2i->withdraws_accepted);
+}
+
+static void
+stats_show_proto_info(struct proto *P)
+{
+ struct stats_proto *p = (void *) P;
+
+ cli_msg(-1006, " Channel %s", "main");
+ cli_msg(-1006, " Table: %s", p->pri->table->name);
+ cli_msg(-1006, " Peer table: %s", p->sec->table->name);
+ cli_msg(-1006, " Import state: %s", rt_export_state_name(rt_export_get_state(p->sec->out_req.hook)));
+ cli_msg(-1006, " Export state: %s", rt_export_state_name(rt_export_get_state(p->pri->out_req.hook)));
+ cli_msg(-1006, " Import filter: %s", filter_name(p->sec->out_filter));
+ cli_msg(-1006, " Export filter: %s", filter_name(p->pri->out_filter));
+
+
+
+ channel_show_limit(&p->pri->in_limit, "Import limit:",
+ (p->pri->limit_active & (1 << PLD_IN)), p->pri->limit_actions[PLD_IN]);
+ channel_show_limit(&p->sec->in_limit, "Export limit:",
+ (p->sec->limit_active & (1 << PLD_IN)), p->sec->limit_actions[PLD_IN]);
+
+ if (P->proto_state != PS_DOWN)
+ stats_show_stats(p);
+}
+
+void
+stats_update_debug(struct proto *P)
+{
+ struct stats_proto *p = (void *) P;
+
+ p->pri->debug = p->sec->debug = p->p.debug;
+}
+
+
+struct protocol proto_stats = {
+ .name = "Stats",
+ .template = "stat%d",
+ .proto_size = sizeof(struct stats_proto),
+ .config_size = sizeof(struct stats_config),
+ .postconfig = stats_postconfig,
+ .init = stats_init,
+ .reconfigure = stats_reconfigure,
+ .copy_config = stats_copy_config,
+ .get_status = stats_get_status,
+ .show_proto_info = stats_show_proto_info
+};
+
+void
+stats_build(void)
+{
+ proto_build(&proto_stats);
+}
projects / thirdparty / bird.git / commitdiff
