Commit f8d44b01 authored by Jan Moskyto Matejka's avatar Jan Moskyto Matejka

Nest: split route show into separate file

parent 95639d95
src := a-path.c a-set.c cli.c cmds.c iface.c locks.c neighbor.c password.c proto.c rt-attr.c rt-dev.c rt-fib.c rt-table.c
src := a-path.c a-set.c cli.c cmds.c iface.c locks.c neighbor.c password.c proto.c rt-attr.c rt-dev.c rt-fib.c rt-show.c rt-table.c
obj := $(src-o-files)
$(all-daemon)
$(cf-local)
......
......@@ -313,7 +313,8 @@ cli_new(void *priv)
c->event->hook = cli_event;
c->event->data = c;
c->cont = cli_hello;
c->parser_pool = lp_new(c->pool, 4096);
c->parser_pool = lp_new(c->pool, 4080);
c->show_pool = lp_new(c->pool, 4080);
c->rx_buf = mb_alloc(c->pool, CLI_RX_BUF_SIZE);
ev_schedule(c->event);
return c;
......
......@@ -38,6 +38,7 @@ typedef struct cli {
int last_reply;
int restricted; /* CLI is restricted to read-only commands */
struct linpool *parser_pool; /* Pool used during parsing */
struct linpool *show_pool; /* Pool used during route show */
byte *ring_buf; /* Ring buffer for asynchronous messages */
byte *ring_end, *ring_read, *ring_write; /* Pointers to the ring buffer */
uint ring_overflow; /* Counter of ring overflows */
......
......@@ -270,6 +270,14 @@ proto_get_router_id(struct proto_config *pc)
return pc->router_id ? pc->router_id : pc->global->router_id;
}
static inline struct ea_list *
rte_make_tmp_attrs(struct rte *rt, struct linpool *pool)
{
struct ea_list *(*mta)(struct rte *rt, struct linpool *pool);
mta = rt->attrs->src->proto->make_tmp_attrs;
return mta ? mta(rt, pool) : NULL;
}
/* Moved from route.h to avoid dependency conflicts */
static inline void rte_update(struct proto *p, const net_addr *n, rte *new) { rte_update2(p->main_channel, n, new, p->main_source); }
......
/*
* BIRD -- Route Display Routines
*
* (c) 1998--2000 Martin Mares <mj@ucw.cz>
* (c) 2017 Jan Moskyto Matejka <mq@jmq.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#undef LOCAL_DEBUG
#include "nest/bird.h"
#include "nest/route.h"
#include "nest/protocol.h"
#include "nest/cli.h"
#include "nest/iface.h"
#include "filter/filter.h"
static void
rt_show_table(struct cli *c, struct rt_show_data *d)
{
/* No table blocks in 'show route count' */
if (d->stats == 2)
return;
if (d->last_table) cli_printf(c, -1007, "");
cli_printf(c, -1007, "Table %s:", d->tab->table->name);
d->last_table = d->tab;
}
static void
rt_show_rte(struct cli *c, byte *ia, rte *e, struct rt_show_data *d, ea_list *tmpa)
{
byte from[IPA_MAX_TEXT_LENGTH+8];
byte tm[TM_DATETIME_BUFFER_SIZE], info[256];
rta *a = e->attrs;
int primary = (e->net->routes == e);
int sync_error = (e->net->n.flags & KRF_SYNC_ERROR);
void (*get_route_info)(struct rte *, byte *buf, struct ea_list *attrs);
struct nexthop *nh;
tm_format_datetime(tm, &config->tf_route, e->lastmod);
if (ipa_nonzero(a->from) && !ipa_equal(a->from, a->nh.gw))
bsprintf(from, " from %I", a->from);
else
from[0] = 0;
get_route_info = a->src->proto->proto->get_route_info;
if (get_route_info || d->verbose)
{
/* Need to normalize the extended attributes */
ea_list *t = tmpa;
t = ea_append(t, a->eattrs);
tmpa = alloca(ea_scan(t));
ea_merge(t, tmpa);
ea_sort(tmpa);
}
if (get_route_info)
get_route_info(e, info, tmpa);
else
bsprintf(info, " (%d)", e->pref);
if (d->last_table != d->tab)
rt_show_table(c, d);
cli_printf(c, -1007, "%-18s %s [%s %s%s]%s%s", ia, rta_dest_name(a->dest),
a->src->proto->name, tm, from, primary ? (sync_error ? " !" : " *") : "", info);
if (a->dest == RTD_UNICAST)
for (nh = &(a->nh); nh; nh = nh->next)
{
char mpls[MPLS_MAX_LABEL_STACK*12 + 5], *lsp = mpls;
if (nh->labels)
{
lsp += bsprintf(lsp, " mpls %d", nh->label[0]);
for (int i=1;i<nh->labels; i++)
lsp += bsprintf(lsp, "/%d", nh->label[i]);
}
*lsp = '\0';
if (a->nh.next)
cli_printf(c, -1007, "\tvia %I%s on %s weight %d", nh->gw, mpls, nh->iface->name, nh->weight + 1);
else
cli_printf(c, -1007, "\tvia %I%s on %s", nh->gw, mpls, nh->iface->name);
}
if (d->verbose)
rta_show(c, a, tmpa);
}
static void
rt_show_net(struct cli *c, net *n, struct rt_show_data *d)
{
rte *e, *ee;
byte ia[NET_MAX_TEXT_LENGTH+1];
struct ea_list *tmpa;
struct channel *ec = d->tab->export_channel;
int first = 1;
int pass = 0;
bsnprintf(ia, sizeof(ia), "%N", n->n.addr);
for (e = n->routes; e; e = e->next)
{
if (rte_is_filtered(e) != d->filtered)
continue;
d->rt_counter++;
d->net_counter += first;
first = 0;
if (pass)
continue;
ee = e;
tmpa = rte_make_tmp_attrs(e, c->show_pool);
/* Export channel is down, do not try to export routes to it */
if (ec && (ec->export_state == ES_DOWN))
goto skip;
/* Special case for merged export */
if ((d->export_mode == RSEM_EXPORT) && (ec->ra_mode == RA_MERGED))
{
rte *rt_free;
e = rt_export_merged(ec, n, &rt_free, &tmpa, c->show_pool, 1);
pass = 1;
if (!e)
{ e = ee; goto skip; }
}
else if (d->export_mode)
{
struct proto *ep = ec->proto;
int ic = ep->import_control ? ep->import_control(ep, &e, &tmpa, c->show_pool) : 0;
if (ec->ra_mode == RA_OPTIMAL || ec->ra_mode == RA_MERGED)
pass = 1;
if (ic < 0)
goto skip;
if (d->export_mode > RSEM_PREEXPORT)
{
/*
* FIXME - This shows what should be exported according to current
* filters, but not what was really exported. 'configure soft'
* command may change the export filter and do not update routes.
*/
int do_export = (ic > 0) ||
(f_run(ec->out_filter, &e, &tmpa, c->show_pool, FF_FORCE_TMPATTR) <= F_ACCEPT);
if (do_export != (d->export_mode == RSEM_EXPORT))
goto skip;
if ((d->export_mode == RSEM_EXPORT) && (ec->ra_mode == RA_ACCEPTED))
pass = 1;
}
}
if (d->show_protocol && (d->show_protocol != e->attrs->src->proto))
goto skip;
if (f_run(d->filter, &e, &tmpa, c->show_pool, FF_FORCE_TMPATTR) > F_ACCEPT)
goto skip;
if (d->stats < 2)
rt_show_rte(c, ia, e, d, tmpa);
d->show_counter++;
ia[0] = 0;
skip:
if (e != ee)
{
rte_free(e);
e = ee;
}
lp_flush(c->show_pool);
if (d->primary_only)
break;
}
}
static void
rt_show_cleanup(struct cli *c)
{
struct rt_show_data *d = c->rover;
struct rt_show_data_rtable *tab;
/* Unlink the iterator */
if (d->table_open)
fit_get(&d->tab->table->fib, &d->fit);
/* Unlock referenced tables */
WALK_LIST(tab, d->tables)
rt_unlock_table(tab->table);
}
static void
rt_show_cont(struct cli *c)
{
struct rt_show_data *d = c->rover;
#ifdef DEBUGGING
unsigned max = 4;
#else
unsigned max = 64;
#endif
struct fib *fib = &d->tab->table->fib;
struct fib_iterator *it = &d->fit;
if (d->running_on_config && (d->running_on_config != config))
{
cli_printf(c, 8004, "Stopped due to reconfiguration");
goto done;
}
if (!d->table_open)
{
FIB_ITERATE_INIT(&d->fit, &d->tab->table->fib);
d->table_open = 1;
d->table_counter++;
d->show_counter_last = d->show_counter;
d->rt_counter_last = d->rt_counter;
d->net_counter_last = d->net_counter;
if (d->tables_defined_by & RSD_TDB_SET)
rt_show_table(c, d);
}
FIB_ITERATE_START(fib, it, net, n)
{
if (!max--)
{
FIB_ITERATE_PUT(it);
return;
}
rt_show_net(c, n, d);
}
FIB_ITERATE_END;
if (d->stats)
{
if (d->last_table != d->tab)
rt_show_table(c, d);
cli_printf(c, -1007, "%d of %d routes for %d networks in table %s",
d->show_counter - d->show_counter_last, d->rt_counter - d->rt_counter_last,
d->net_counter - d->net_counter_last, d->tab->table->name);
}
d->table_open = 0;
d->tab = NODE_NEXT(d->tab);
if (NODE_VALID(d->tab))
return;
if (d->stats && (d->table_counter > 1))
{
if (d->last_table) cli_printf(c, -1007, "");
cli_printf(c, 14, "Total: %d of %d routes for %d networks in %d tables",
d->show_counter, d->rt_counter, d->net_counter, d->table_counter);
}
else
cli_printf(c, 0, "");
done:
rt_show_cleanup(c);
c->cont = c->cleanup = NULL;
}
struct rt_show_data_rtable *
rt_show_add_table(struct rt_show_data *d, rtable *t)
{
struct rt_show_data_rtable *tab = cfg_allocz(sizeof(struct rt_show_data_rtable));
tab->table = t;
add_tail(&(d->tables), &(tab->n));
return tab;
}
static inline void
rt_show_get_default_tables(struct rt_show_data *d)
{
struct channel *c;
struct rt_show_data_rtable *tab;
if (d->export_channel)
{
c = d->export_channel;
tab = rt_show_add_table(d, c->table);
tab->export_channel = c;
return;
}
if (d->export_protocol)
{
WALK_LIST(c, d->export_protocol->channels)
{
if (c->export_state == ES_DOWN)
continue;
tab = rt_show_add_table(d, c->table);
tab->export_channel = c;
}
return;
}
if (d->show_protocol)
{
WALK_LIST(c, d->show_protocol->channels)
rt_show_add_table(d, c->table);
return;
}
for (int i=1; i<NET_MAX; i++)
if (config->def_tables[i])
rt_show_add_table(d, config->def_tables[i]->table);
}
static inline void
rt_show_prepare_tables(struct rt_show_data *d)
{
struct rt_show_data_rtable *tab, *tabx;
/* Add implicit tables if no table is specified */
if (EMPTY_LIST(d->tables))
rt_show_get_default_tables(d);
WALK_LIST_DELSAFE(tab, tabx, d->tables)
{
/* Ensure there is defined export_channel for each table */
if (d->export_mode)
{
if (!tab->export_channel && d->export_channel &&
(tab->table == d->export_channel->table))
tab->export_channel = d->export_channel;
if (!tab->export_channel && d->export_protocol)
tab->export_channel = proto_find_channel_by_table(d->export_protocol, tab->table);
if (!tab->export_channel)
{
if (d->tables_defined_by & RSD_TDB_NMN)
cf_error("No export channel for table %s", tab->table->name);
rem_node(&(tab->n));
continue;
}
}
/* Ensure specified network is compatible with each table */
if (d->addr && (tab->table->addr_type != d->addr->type))
{
if (d->tables_defined_by & RSD_TDB_NMN)
cf_error("Incompatible type of prefix/ip for table %s", tab->table->name);
rem_node(&(tab->n));
continue;
}
}
/* Ensure there is at least one table */
if (EMPTY_LIST(d->tables))
cf_error("No valid tables");
}
void
rt_show(struct rt_show_data *d)
{
struct rt_show_data_rtable *tab;
net *n;
/* Filtered routes are neither exported nor have sensible ordering */
if (d->filtered && (d->export_mode || d->primary_only))
cf_error("Incompatible show route options");
rt_show_prepare_tables(d);
if (!d->addr)
{
WALK_LIST(tab, d->tables)
rt_lock_table(tab->table);
/* There is at least one table */
d->tab = HEAD(d->tables);
this_cli->cont = rt_show_cont;
this_cli->cleanup = rt_show_cleanup;
this_cli->rover = d;
}
else
{
WALK_LIST(tab, d->tables)
{
d->tab = tab;
if (d->show_for)
n = net_route(tab->table, d->addr);
else
n = net_find(tab->table, d->addr);
if (n)
rt_show_net(this_cli, n, d);
}
if (d->rt_counter)
cli_msg(0, "");
else
cli_msg(8001, "Network not found");
}
}
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