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Merge branch 'mq-custom' into int-new

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This commit is contained in:
Jan Maria Matejka 2018-12-06 09:55:34 +01:00
parent 0e4920632a 265419a369
commit 9a5ef043c1
9 changed files with 215 additions and 21 deletions
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4
conf/conf.h
View file

@ -15,7 +15,6 @@
#include "lib/resource.h"
#include "lib/timer.h"
/* Configuration structure */
struct config {
@ -128,9 +127,12 @@ struct sym_scope {
#define SYM_FUNCTION 3
#define SYM_FILTER 4
#define SYM_TABLE 5
#define SYM_ATTRIBUTE 6
#define SYM_VARIABLE 0x100 /* 0x100-0x1ff are variable types */
#define SYM_VARIABLE_RANGE SYM_VARIABLE ... (SYM_VARIABLE | 0xff)
#define SYM_CONSTANT 0x200 /* 0x200-0x2ff are variable types */
#define SYM_CONSTANT_RANGE SYM_CONSTANT ... (SYM_CONSTANT | 0xff)
#define SYM_TYPE(s) (((struct f_val *) (s)->def)->type)
#define SYM_VAL(s) (((struct f_val *) (s)->def)->val)

8
doc/bird.sgml
View file

@ -25,7 +25,7 @@ configuration - something in config which is not keyword.
Ondrej Filip <it/&lt;feela@network.cz&gt;/,
Pavel Machek <it/&lt;pavel@ucw.cz&gt;/,
Martin Mares <it/&lt;mj@ucw.cz&gt;/,
Jan Matejka <it/&lt;mq@jmq.cz&gt;/,
Maria Jan Matejka <it/&lt;mq@jmq.cz&gt;/,
Ondrej Zajicek <it/&lt;santiago@crfreenet.org&gt;/
</author>
@ -552,6 +552,12 @@ include "tablename.conf";;
constants based on /etc/iproute2/rt_* files. A list of defined constants
can be seen (together with other symbols) using 'show symbols' command.
<tag><label id="opt-attribute">attribute <m/type/ <m/name/</tag>
Define a custom route attribute. You can set and get it in filters like
any other route atribute. This feature is intended for marking routes
in import filters for export filtering purposes instead of locally
assigned BGP communities which have to be deleted in export filters.
<tag><label id="opt-router-id">router id <m/IPv4 address/</tag>
Set BIRD's router ID. It's a world-wide unique identification of your
router, usually one of router's IPv4 addresses. Default: the lowest

43
filter/config.Y
View file

@ -417,7 +417,7 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
ADD, DELETE, CONTAINS, RESET,
PREPEND, FIRST, LAST, LAST_NONAGGREGATED, MATCH,
EMPTY,
FILTER, WHERE, EVAL,
FILTER, WHERE, EVAL, ATTRIBUTE,
BT_ASSERT, BT_TEST_SUITE, FORMAT)
%nonassoc THEN
@ -455,6 +455,11 @@ filter_eval:
EVAL term { f_eval_int($2); }
;
conf: custom_attr ;
custom_attr: ATTRIBUTE type SYM ';' {
cf_define_symbol($3, SYM_ATTRIBUTE, ca_lookup(new_config->pool, $3->name, $2)->fda);
};
conf: bt_test_suite ;
bt_test_suite:
BT_TEST_SUITE '(' SYM ',' text ')' {
@ -834,14 +839,22 @@ function_call:
symbol:
SYM {
switch ($1->class & 0xff00) {
case SYM_CONSTANT: $$ = f_new_inst(FI_CONSTANT_INDIRECT); break;
case SYM_VARIABLE: $$ = f_new_inst(FI_VARIABLE); break;
default: cf_error("%s: variable expected.", $1->name);
switch ($1->class & 0xffff) {
case SYM_CONSTANT_RANGE:
$$ = f_new_inst(FI_CONSTANT_INDIRECT);
goto cv_common;
case SYM_VARIABLE_RANGE:
$$ = f_new_inst(FI_VARIABLE);
cv_common:
$$->a1.p = $1->def;
$$->a2.p = $1->name;
break;
case SYM_ATTRIBUTE:
$$ = f_new_inst_da(FI_EA_GET, *((struct f_dynamic_attr *) $1->def));
break;
default:
cf_error("%s: variable expected.", $1->name);
}
$$->a1.p = $1->def;
$$->a2.p = $1->name;
}
static_attr:
@ -1001,11 +1014,15 @@ cmd:
}
| SYM '=' term ';' {
DBG( "Ook, we'll set value\n" );
if (($1->class & ~T_MASK) != SYM_VARIABLE)
cf_error( "You may set only variables." );
$$ = f_new_inst(FI_SET);
$$->a1.p = $1;
$$->a2.p = $3;
if ($1->class == SYM_ATTRIBUTE) {
$$ = f_new_inst_da(FI_EA_SET, *((struct f_dynamic_attr *) $1->def));
$$->a1.p = $3;
} else if (($1->class & ~T_MASK) == SYM_VARIABLE) {
$$ = f_new_inst(FI_SET);
$$->a1.p = $1;
$$->a2.p = $3;
} else
cf_error( "Symbol `%s' is read-only.", $1->name );
}
| RETURN term ';' {
DBG( "Ook, we'll return the value\n" );

144
filter/f-util.c
View file

@ -10,6 +10,9 @@
#include "nest/bird.h"
#include "conf/conf.h"
#include "filter/filter.h"
#include "lib/idm.h"
#include "nest/protocol.h"
#include "nest/route.h"
#define P(a,b) ((a<<8) | b)
@ -105,3 +108,144 @@ filter_name(struct filter *filter)
else
return filter->name;
}
#define CA_KEY(n) n->name, n->fda.type
#define CA_NEXT(n) n->next
#define CA_EQ(na,ta,nb,tb) (!strcmp(na,nb) && (ta == tb))
#define CA_FN(n,t) (mem_hash(n, strlen(n)) ^ (t*0xaae99453U))
#define CA_ORDER 8 /* Fixed */
struct ca_storage {
struct ca_storage *next;
struct f_dynamic_attr fda;
u32 uc;
char name[0];
};
HASH(struct ca_storage) ca_hash;
static struct idm ca_idm;
static struct ca_storage **ca_storage;
static uint ca_storage_max;
static void
ca_free(resource *r)
{
struct custom_attribute *ca = (void *) r;
struct ca_storage *cas = HASH_FIND(ca_hash, CA, ca->name, ca->fda->type);
ASSERT(cas);
ca->name = NULL;
ca->fda = NULL;
if (!--cas->uc) {
uint id = EA_CUSTOM_ID(cas->fda.ea_code);
idm_free(&ca_idm, id);
HASH_REMOVE(ca_hash, CA, cas);
ca_storage[id] = NULL;
mb_free(cas);
}
}
static void
ca_dump(resource *r)
{
struct custom_attribute *ca = (void *) r;
debug("name \"%s\" id 0x%04x ea_type 0x%02x f_type 0x%02x\n",
ca->name, ca->fda->ea_code, ca->fda->type, ca->fda->f_type);
}
static struct resclass ca_class = {
.name = "Custom attribute",
.size = sizeof(struct custom_attribute),
.free = ca_free,
.dump = ca_dump,
.lookup = NULL,
.memsize = NULL,
};
struct custom_attribute *
ca_lookup(pool *p, const char *name, int f_type)
{
int ea_type;
switch (f_type) {
case T_INT:
ea_type = EAF_TYPE_INT;
break;
case T_IP:
ea_type = EAF_TYPE_IP_ADDRESS;
break;
case T_QUAD:
ea_type = EAF_TYPE_ROUTER_ID;
break;
case T_PATH:
ea_type = EAF_TYPE_AS_PATH;
break;
case T_CLIST:
ea_type = EAF_TYPE_INT_SET;
break;
case T_ECLIST:
ea_type = EAF_TYPE_EC_SET;
break;
case T_LCLIST:
ea_type = EAF_TYPE_LC_SET;
break;
default:
cf_error("Custom route attribute of unsupported type");
}
static int inited = 0;
if (!inited) {
idm_init(&ca_idm, &root_pool, 8);
HASH_INIT(ca_hash, &root_pool, CA_ORDER);
ca_storage_max = 256;
ca_storage = mb_allocz(&root_pool, sizeof(struct ca_storage *) * ca_storage_max);
inited++;
}
struct ca_storage *cas = HASH_FIND(ca_hash, CA, name, ea_type);
if (cas) {
cas->uc++;
} else {
uint id = idm_alloc(&ca_idm);
if (id >= EA_CUSTOM_BIT)
cf_error("Too many custom attributes.");
if (id >= ca_storage_max) {
ca_storage_max *= 2;
ca_storage = mb_realloc(ca_storage, sizeof(struct ca_storage *) * ca_storage_max * 2);
}
cas = mb_allocz(&root_pool, sizeof(struct ca_storage) + strlen(name) + 1);
cas->fda = f_new_dynamic_attr(ea_type, f_type, EA_CUSTOM(id));
cas->uc = 1;
strcpy(cas->name, name);
ca_storage[id] = cas;
HASH_INSERT(ca_hash, CA, cas);
}
struct custom_attribute *ca = ralloc(p, &ca_class);
ca->fda = &(cas->fda);
ca->name = cas->name;
return ca;
}
const char *
ea_custom_name(uint ea)
{
uint id = EA_CUSTOM_ID(ea);
if (id >= ca_storage_max)
return NULL;
if (!ca_storage[id])
return NULL;
return ca_storage[id]->name;
}

2
filter/filter.c
View file

@ -1063,7 +1063,7 @@ interpret(struct f_inst *what)
break;
}
switch (what->aux & EAF_TYPE_MASK) {
switch (e->type & EAF_TYPE_MASK) {
case EAF_TYPE_INT:
res.type = f_type;
res.val.i = e->u.data;

9
filter/filter.h
View file

@ -287,6 +287,15 @@ struct f_trie
#define FF_SILENT 2 /* Silent filter execution */
/* Custom route attributes */
struct custom_attribute {
resource r;
struct f_dynamic_attr *fda;
const char *name;
};
struct custom_attribute *ca_lookup(pool *p, const char *name, int ea_type);
/* Bird Tests */
struct f_bt_test_suite {
node n; /* Node in config->tests */

4
nest/config.Y
View file

@ -532,6 +532,7 @@ r_args:
$$ = cfg_allocz(sizeof(struct rt_show_data));
init_list(&($$->tables));
$$->filter = FILTER_ACCEPT;
$$->running_on_config = new_config->fallback;
}
| r_args net_any {
$$ = $1;
@ -586,7 +587,6 @@ r_args:
if ($3->class != SYM_PROTO || !c->proto) cf_error("%s is not a protocol", $3->name);
$$->export_mode = $2;
$$->export_protocol = c->proto;
$$->running_on_config = c->proto->cf->global;
$$->tables_defined_by = RSD_TDB_INDIRECT;
}
| r_args export_mode SYM '.' r_args_channel {
@ -597,7 +597,6 @@ r_args:
$$->export_mode = $2;
$$->export_channel = proto_find_channel_by_name(c->proto, $5);
if (!$$->export_channel) cf_error("Export channel not found");
$$->running_on_config = c->proto->cf->global;
$$->tables_defined_by = RSD_TDB_INDIRECT;
}
| r_args PROTOCOL SYM {
@ -606,7 +605,6 @@ r_args:
if ($$->show_protocol) cf_error("Protocol specified twice");
if ($3->class != SYM_PROTO || !c->proto) cf_error("%s is not a protocol", $3->name);
$$->show_protocol = c->proto;
$$->running_on_config = c->proto->cf->global;
$$->tables_defined_by = RSD_TDB_INDIRECT;
}
| r_args STATS {

9
nest/route.h
View file

@ -471,13 +471,20 @@ typedef struct eattr {
} u;
} eattr;
#define EA_CODE(proto,id) (((proto) << 8) | (id))
#define EA_PROTO(ea) ((ea) >> 8)
#define EA_ID(ea) ((ea) & 0xff)
#define EA_PROTO(ea) ((ea) >> 8)
#define EA_CUSTOM(id) ((id) | EA_CUSTOM_BIT)
#define EA_IS_CUSTOM(ea) ((ea) & EA_CUSTOM_BIT)
#define EA_CUSTOM_ID(ea) ((ea) & ~EA_CUSTOM_BIT)
const char *ea_custom_name(uint ea);
#define EA_GEN_IGP_METRIC EA_CODE(PROTOCOL_NONE, 0)
#define EA_CODE_MASK 0xffff
#define EA_CUSTOM_BIT 0x8000
#define EA_ALLOW_UNDEF 0x10000 /* ea_find: allow EAF_TYPE_UNDEF */
#define EA_BIT(n) ((n) << 24) /* Used in bitfield accessors */

13
nest/rt-attr.c
View file

@ -884,7 +884,18 @@ ea_show(struct cli *c, eattr *e)
byte buf[CLI_MSG_SIZE];
byte *pos = buf, *end = buf + sizeof(buf);
if (p = class_to_protocol[EA_PROTO(e->id)])
if (EA_IS_CUSTOM(e->id))
{
const char *name = ea_custom_name(e->id);
if (name)
{
pos += bsprintf(pos, "%s", name);
status = GA_NAME;
}
else
pos += bsprintf(pos, "%02x.", EA_PROTO(e->id));
}
else if (p = class_to_protocol[EA_PROTO(e->id)])
{
pos += bsprintf(pos, "%s.", p->name);
if (p->get_attr)