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BGP: Support for large communities

Browse Source 
Add support for large communities (draft-ietf-idr-large-community),
96bit alternative to RFC 1997 communities.

Thanks to Matt Griswold for the original patch.
This commit is contained in:
Ondrej Zajicek (work) 2016-10-01 12:50:29 +02:00
parent f51b1f5565
commit 66dbdbd993
11 changed files with 462 additions and 13 deletions
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43
filter/config.Y
View File

@ -36,6 +36,7 @@ f_valid_set_type(int type)
case T_ENUM: case T_ENUM:
case T_IP: case T_IP:
case T_EC: case T_EC:
case T_LC:
return 1; return 1;
default: default:
@ -148,6 +149,9 @@ f_generate_empty(struct f_inst *dyn)
case EAF_TYPE_EC_SET: case EAF_TYPE_EC_SET:
e->aux = T_ECLIST; e->aux = T_ECLIST;
break; break;
case EAF_TYPE_LC_SET:
e->aux = T_LCLIST;
break;
default: default:
cf_error("Can't empty that attribute"); cf_error("Can't empty that attribute");
} }
@ -268,14 +272,44 @@ f_generate_ec(u16 kind, struct f_inst *tk, struct f_inst *tv)
return rv; return rv;
} }
static inline struct f_inst *
f_generate_lc(struct f_inst *t1, struct f_inst *t2, struct f_inst *t3)
{
struct f_inst *rv;
if ((t1->code == 'c') && (t2->code == 'c') && (t3->code == 'c')) {
if ((t1->aux != T_INT) || (t2->aux != T_INT) || (t3->aux != T_INT))
cf_error( "LC - Can't operate with value of non-integer type in tuple constructor");
rv = f_new_inst();
rv->code = 'C';
NEW_F_VAL;
rv->a1.p = val;
val->type = T_LC;
val->val.lc = (lcomm) { t1->a2.i, t2->a2.i, t3->a2.i };
}
else
{
rv = cfg_allocz(sizeof(struct f_inst3));
rv->lineno = ifs->lino;
rv->code = P('m','l');
rv->a1.p = t1;
rv->a2.p = t2;
INST3(rv).p = t3;
}
return rv;
}
CF_DECLS CF_DECLS
CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN, CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
ACCEPT, REJECT, ERROR, QUITBIRD, ACCEPT, REJECT, ERROR, QUITBIRD,
INT, BOOL, IP, PREFIX, PAIR, QUAD, EC, INT, BOOL, IP, PREFIX, PAIR, QUAD, EC, LC,
SET, STRING, BGPMASK, BGPPATH, CLIST, ECLIST, SET, STRING, BGPMASK, BGPPATH, CLIST, ECLIST, LCLIST,
IF, THEN, ELSE, CASE, IF, THEN, ELSE, CASE,
TRUE, FALSE, RT, RO, UNKNOWN, GENERIC, TRUE, FALSE, RT, RO, UNKNOWN, GENERIC,
FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, CAST, DEST, IFNAME, IFINDEX, FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, CAST, DEST, IFNAME, IFINDEX,
@ -327,17 +361,20 @@ type:
| PAIR { $$ = T_PAIR; } | PAIR { $$ = T_PAIR; }
| QUAD { $$ = T_QUAD; } | QUAD { $$ = T_QUAD; }
| EC { $$ = T_EC; } | EC { $$ = T_EC; }
| LC { $$ = T_LC; }
| STRING { $$ = T_STRING; } | STRING { $$ = T_STRING; }
| BGPMASK { $$ = T_PATH_MASK; } | BGPMASK { $$ = T_PATH_MASK; }
| BGPPATH { $$ = T_PATH; } | BGPPATH { $$ = T_PATH; }
| CLIST { $$ = T_CLIST; } | CLIST { $$ = T_CLIST; }
| ECLIST { $$ = T_ECLIST; } | ECLIST { $$ = T_ECLIST; }
| LCLIST { $$ = T_LCLIST; }
| type SET { | type SET {
switch ($1) { switch ($1) {
case T_INT: case T_INT:
case T_PAIR: case T_PAIR:
case T_QUAD: case T_QUAD:
case T_EC: case T_EC:
case T_LC:
case T_IP: case T_IP:
$$ = T_SET; $$ = T_SET;
break; break;
@ -657,6 +694,7 @@ constant:
constructor: constructor:
'(' term ',' term ')' { $$ = f_generate_dpair($2, $4); } '(' term ',' term ')' { $$ = f_generate_dpair($2, $4); }
| '(' ec_kind ',' term ',' term ')' { $$ = f_generate_ec($2, $4, $6); } | '(' ec_kind ',' term ',' term ')' { $$ = f_generate_ec($2, $4, $6); }
| '(' term ',' term ',' term ')' { $$ = f_generate_lc($2, $4, $6); }
; ;
@ -767,6 +805,7 @@ term:
| '+' EMPTY '+' { $$ = f_new_inst(); $$->code = 'E'; $$->aux = T_PATH; } | '+' EMPTY '+' { $$ = f_new_inst(); $$->code = 'E'; $$->aux = T_PATH; }
| '-' EMPTY '-' { $$ = f_new_inst(); $$->code = 'E'; $$->aux = T_CLIST; } | '-' EMPTY '-' { $$ = f_new_inst(); $$->code = 'E'; $$->aux = T_CLIST; }
| '-' '-' EMPTY '-' '-' { $$ = f_new_inst(); $$->code = 'E'; $$->aux = T_ECLIST; } | '-' '-' EMPTY '-' '-' { $$ = f_new_inst(); $$->code = 'E'; $$->aux = T_ECLIST; }
| '-' '-' '-' EMPTY '-' '-' '-' { $$ = f_new_inst(); $$->code = 'E'; $$->aux = T_LCLIST; }
| PREPEND '(' term ',' term ')' { $$ = f_new_inst(); $$->code = P('A','p'); $$->a1.p = $3; $$->a2.p = $5; } | PREPEND '(' term ',' term ')' { $$ = f_new_inst(); $$->code = P('A','p'); $$->a1.p = $3; $$->a2.p = $5; }
| ADD '(' term ',' term ')' { $$ = f_new_inst(); $$->code = P('C','a'); $$->a1.p = $3; $$->a2.p = $5; $$->aux = 'a'; } | ADD '(' term ',' term ')' { $$ = f_new_inst(); $$->code = P('C','a'); $$->a1.p = $3; $$->a2.p = $5; $$->aux = 'a'; }
| DELETE '(' term ',' term ')' { $$ = f_new_inst(); $$->code = P('C','a'); $$->a1.p = $3; $$->a2.p = $5; $$->aux = 'd'; } | DELETE '(' term ',' term ')' { $$ = f_new_inst(); $$->code = P('C','a'); $$->a1.p = $3; $$->a2.p = $5; $$->aux = 'd'; }

171
filter/filter.c
View File

@ -106,6 +106,18 @@ u64_cmp(u64 i1, u64 i2)
return (int)(i1 > i2) - (int)(i1 < i2); return (int)(i1 > i2) - (int)(i1 < i2);
} }
static inline int
lcomm_cmp(lcomm v1, lcomm v2)
{
if (v1.asn != v2.asn)
return (v1.asn > v2.asn) ? 1 : -1;
if (v1.ldp1 != v2.ldp1)
return (v1.ldp1 > v2.ldp1) ? 1 : -1;
if (v1.ldp2 != v2.ldp2)
return (v1.ldp2 > v2.ldp2) ? 1 : -1;
return 0;
}
/** /**
* val_compare - compare two values * val_compare - compare two values
* @v1: first value * @v1: first value
@ -149,6 +161,8 @@ val_compare(struct f_val v1, struct f_val v2)
return uint_cmp(v1.val.i, v2.val.i); return uint_cmp(v1.val.i, v2.val.i);
case T_EC: case T_EC:
return u64_cmp(v1.val.ec, v2.val.ec); return u64_cmp(v1.val.ec, v2.val.ec);
case T_LC:
return lcomm_cmp(v1.val.lc, v2.val.lc);
case T_IP: case T_IP:
return ipa_compare(v1.val.px.ip, v2.val.px.ip); return ipa_compare(v1.val.px.ip, v2.val.px.ip);
case T_PREFIX: case T_PREFIX:
@ -214,6 +228,7 @@ val_same(struct f_val v1, struct f_val v2)
case T_PATH: case T_PATH:
case T_CLIST: case T_CLIST:
case T_ECLIST: case T_ECLIST:
case T_LCLIST:
return adata_same(v1.val.ad, v2.val.ad); return adata_same(v1.val.ad, v2.val.ad);
case T_SET: case T_SET:
return same_tree(v1.val.t, v2.val.t); return same_tree(v1.val.t, v2.val.t);
@ -266,6 +281,10 @@ static inline int
eclist_set_type(struct f_tree *set) eclist_set_type(struct f_tree *set)
{ return set->from.type == T_EC; } { return set->from.type == T_EC; }
static inline int
lclist_set_type(struct f_tree *set)
{ return set->from.type == T_LC; }
static int static int
clist_match_set(struct adata *clist, struct f_tree *set) clist_match_set(struct adata *clist, struct f_tree *set)
{ {
@ -311,6 +330,30 @@ eclist_match_set(struct adata *list, struct f_tree *set)
return 0; return 0;
} }
static int
lclist_match_set(struct adata *list, struct f_tree *set)
{
if (!list)
return 0;
if (!lclist_set_type(set))
return CMP_ERROR;
struct f_val v;
u32 *l = int_set_get_data(list);
int len = int_set_get_size(list);
int i;
v.type = T_LC;
for (i = 0; i < len; i += 3) {
v.val.lc = lc_get(l, i);
if (find_tree(set, v))
return 1;
}
return 0;
}
static struct adata * static struct adata *
clist_filter(struct linpool *pool, struct adata *list, struct f_val set, int pos) clist_filter(struct linpool *pool, struct adata *list, struct f_val set, int pos)
{ {
@ -380,6 +423,38 @@ eclist_filter(struct linpool *pool, struct adata *list, struct f_val set, int po
return res; return res;
} }
static struct adata *
lclist_filter(struct linpool *pool, struct adata *list, struct f_val set, int pos)
{
if (!list)
return NULL;
int tree = (set.type == T_SET); /* 1 -> set is T_SET, 0 -> set is T_CLIST */
struct f_val v;
int len = int_set_get_size(list);
u32 *l = int_set_get_data(list);
u32 tmp[len];
u32 *k = tmp;
int i;
v.type = T_LC;
for (i = 0; i < len; i += 3) {
v.val.lc = lc_get(l, i);
/* pos && member(val, set) || !pos && !member(val, set), member() depends on tree */
if ((tree ? !!find_tree(set.val.t, v) : lc_set_contains(set.val.ad, v.val.lc)) == pos)
k = lc_copy(k, l+i);
}
int nl = (k - tmp) * 4;
if (nl == list->length)
return list;
struct adata *res = adata_empty(pool, nl);
memcpy(res->data, tmp, nl);
return res;
}
/** /**
* val_in_range - implement |~| operator * val_in_range - implement |~| operator
* @v1: element * @v1: element
@ -407,6 +482,9 @@ val_in_range(struct f_val v1, struct f_val v2)
if ((v1.type == T_EC) && (v2.type == T_ECLIST)) if ((v1.type == T_EC) && (v2.type == T_ECLIST))
return ec_set_contains(v2.val.ad, v1.val.ec); return ec_set_contains(v2.val.ad, v1.val.ec);
if ((v1.type == T_LC) && (v2.type == T_LCLIST))
return lc_set_contains(v2.val.ad, v1.val.lc);
if ((v1.type == T_STRING) && (v2.type == T_STRING)) if ((v1.type == T_STRING) && (v2.type == T_STRING))
return patmatch(v2.val.s, v1.val.s); return patmatch(v2.val.s, v1.val.s);
@ -433,6 +511,9 @@ val_in_range(struct f_val v1, struct f_val v2)
if (v1.type == T_ECLIST) if (v1.type == T_ECLIST)
return eclist_match_set(v1.val.ad, v2.val.t); return eclist_match_set(v1.val.ad, v2.val.t);
if (v1.type == T_LCLIST)
return lclist_match_set(v1.val.ad, v2.val.t);
if (v1.type == T_PATH) if (v1.type == T_PATH)
return as_path_match_set(v1.val.ad, v2.val.t); return as_path_match_set(v1.val.ad, v2.val.t);
@ -457,12 +538,14 @@ val_format(struct f_val v, buffer *buf)
case T_PAIR: buffer_print(buf, "(%u,%u)", v.val.i >> 16, v.val.i & 0xffff); return; case T_PAIR: buffer_print(buf, "(%u,%u)", v.val.i >> 16, v.val.i & 0xffff); return;
case T_QUAD: buffer_print(buf, "%R", v.val.i); return; case T_QUAD: buffer_print(buf, "%R", v.val.i); return;
case T_EC: ec_format(buf2, v.val.ec); buffer_print(buf, "%s", buf2); return; case T_EC: ec_format(buf2, v.val.ec); buffer_print(buf, "%s", buf2); return;
case T_LC: lc_format(buf2, v.val.lc); buffer_print(buf, "%s", buf2); return;
case T_PREFIX_SET: trie_format(v.val.ti, buf); return; case T_PREFIX_SET: trie_format(v.val.ti, buf); return;
case T_SET: tree_format(v.val.t, buf); return; case T_SET: tree_format(v.val.t, buf); return;
case T_ENUM: buffer_print(buf, "(enum %x)%u", v.type, v.val.i); return; case T_ENUM: buffer_print(buf, "(enum %x)%u", v.type, v.val.i); return;
case T_PATH: as_path_format(v.val.ad, buf2, 1000); buffer_print(buf, "(path %s)", buf2); return; case T_PATH: as_path_format(v.val.ad, buf2, 1000); buffer_print(buf, "(path %s)", buf2); return;
case T_CLIST: int_set_format(v.val.ad, 1, -1, buf2, 1000); buffer_print(buf, "(clist %s)", buf2); return; case T_CLIST: int_set_format(v.val.ad, 1, -1, buf2, 1000); buffer_print(buf, "(clist %s)", buf2); return;
case T_ECLIST: ec_set_format(v.val.ad, -1, buf2, 1000); buffer_print(buf, "(eclist %s)", buf2); return; case T_ECLIST: ec_set_format(v.val.ad, -1, buf2, 1000); buffer_print(buf, "(eclist %s)", buf2); return;
case T_LCLIST: lc_set_format(v.val.ad, -1, buf2, 1000); buffer_print(buf, "(lclist %s)", buf2); return;
case T_PATH_MASK: pm_format(v.val.path_mask, buf); return; case T_PATH_MASK: pm_format(v.val.path_mask, buf); return;
default: buffer_print(buf, "[unknown type %x]", v.type); return; default: buffer_print(buf, "[unknown type %x]", v.type); return;
} }
@ -656,6 +739,7 @@ interpret(struct f_inst *what)
runtime("Can't operate with value of non-integer type in EC constructor"); runtime("Can't operate with value of non-integer type in EC constructor");
val = v2.val.i; val = v2.val.i;
/* XXXX */
res.type = T_EC; res.type = T_EC;
if (what->aux == EC_GENERIC) { if (what->aux == EC_GENERIC) {
@ -677,6 +761,24 @@ interpret(struct f_inst *what)
break; break;
} }
case P('m','l'):
{
TWOARGS;
/* Third argument hack */
struct f_val v3 = interpret(INST3(what).p);
if (v3.type & T_RETURN)
return v3;
if ((v1.type != T_INT) || (v2.type != T_INT) || (v3.type != T_INT))
runtime( "Can't operate with value of non-integer type in LC constructor" );
res.type = T_LC;
res.val.lc = (lcomm) { v1.val.i, v2.val.i, v3.val.i };
break;
}
/* Relational operators */ /* Relational operators */
#define COMPARE(x) \ #define COMPARE(x) \
@ -912,6 +1014,13 @@ interpret(struct f_inst *what)
break; break;
} }
/* The same special case for lc_set */
if ((what->aux & EAF_TYPE_MASK) == EAF_TYPE_LC_SET) {
res.type = T_LCLIST;
res.val.ad = adata_empty(f_pool, 0);
break;
}
/* Undefined value */ /* Undefined value */
res.type = T_VOID; res.type = T_VOID;
break; break;
@ -951,6 +1060,10 @@ interpret(struct f_inst *what)
res.type = T_ECLIST; res.type = T_ECLIST;
res.val.ad = e->u.ptr; res.val.ad = e->u.ptr;
break; break;
case EAF_TYPE_LC_SET:
res.type = T_LCLIST;
res.val.ad = e->u.ptr;
break;
case EAF_TYPE_UNDEF: case EAF_TYPE_UNDEF:
res.type = T_VOID; res.type = T_VOID;
break; break;
@ -1041,6 +1154,11 @@ interpret(struct f_inst *what)
runtime( "Setting eclist attribute to non-eclist value" ); runtime( "Setting eclist attribute to non-eclist value" );
l->attrs[0].u.ptr = v1.val.ad; l->attrs[0].u.ptr = v1.val.ad;
break; break;
case EAF_TYPE_LC_SET:
if (v1.type != T_LCLIST)
runtime( "Setting lclist attribute to non-lclist value" );
l->attrs[0].u.ptr = v1.val.ad;
break;
case EAF_TYPE_UNDEF: case EAF_TYPE_UNDEF:
if (v1.type != T_VOID) if (v1.type != T_VOID)
runtime( "Setting void attribute to non-void value" ); runtime( "Setting void attribute to non-void value" );
@ -1082,6 +1200,7 @@ interpret(struct f_inst *what)
case T_PATH: res.val.i = as_path_getlen(v1.val.ad); break; case T_PATH: res.val.i = as_path_getlen(v1.val.ad); break;
case T_CLIST: res.val.i = int_set_get_size(v1.val.ad); break; case T_CLIST: res.val.i = int_set_get_size(v1.val.ad); break;
case T_ECLIST: res.val.i = ec_set_get_size(v1.val.ad); break; case T_ECLIST: res.val.i = ec_set_get_size(v1.val.ad); break;
case T_LCLIST: res.val.i = lc_set_get_size(v1.val.ad); break;
default: runtime( "Prefix, path, clist or eclist expected" ); default: runtime( "Prefix, path, clist or eclist expected" );
} }
break; break;
@ -1277,7 +1396,7 @@ interpret(struct f_inst *what)
else if (v2.type == T_ECLIST) else if (v2.type == T_ECLIST)
arg_set = 2; arg_set = 2;
else if (v2.type != T_EC) else if (v2.type != T_EC)
runtime("Can't add/delete non-pair"); runtime("Can't add/delete non-ec");
res.type = T_ECLIST; res.type = T_ECLIST;
switch (what->aux) switch (what->aux)
@ -1308,8 +1427,50 @@ interpret(struct f_inst *what)
bug("unknown Ca operation"); bug("unknown Ca operation");
} }
} }
else if (v1.type == T_LCLIST)
{
/* Large community list */
int arg_set = 0;
/* v2.val is either LC or LC-set */
if ((v2.type == T_SET) && lclist_set_type(v2.val.t))
arg_set = 1;
else if (v2.type == T_LCLIST)
arg_set = 2;
else if (v2.type != T_LC)
runtime("Can't add/delete non-lc");
res.type = T_LCLIST;
switch (what->aux)
{
case 'a':
if (arg_set == 1)
runtime("Can't add set");
else if (!arg_set)
res.val.ad = lc_set_add(f_pool, v1.val.ad, v2.val.lc);
else
res.val.ad = lc_set_union(f_pool, v1.val.ad, v2.val.ad);
break;
case 'd':
if (!arg_set)
res.val.ad = lc_set_del(f_pool, v1.val.ad, v2.val.lc);
else
res.val.ad = lclist_filter(f_pool, v1.val.ad, v2, 0);
break;
case 'f':
if (!arg_set)
runtime("Can't filter lc");
res.val.ad = lclist_filter(f_pool, v1.val.ad, v2, 1);
break;
default:
bug("unknown Ca operation");
}
}
else else
runtime("Can't add/delete to non-(e)clist"); runtime("Can't add/delete to non-[e|l]clist");
break; break;
@ -1401,6 +1562,12 @@ i_same(struct f_inst *f1, struct f_inst *f2)
case '~': TWOARGS; break; case '~': TWOARGS; break;
case P('d','e'): ONEARG; break; case P('d','e'): ONEARG; break;
case P('m','l'):
TWOARGS;
if (!i_same(INST3(f1).p, INST3(f2).p))
return 0;
break;
case 's': case 's':
ARG(v2, a2.p); ARG(v2, a2.p);
{ {

18
filter/filter.h
View File

@ -38,6 +38,17 @@ struct f_inst_roa_check {
struct roa_table_config *rtc; struct roa_table_config *rtc;
}; };
struct f_inst3 {
struct f_inst i;
union {
int i;
void *p;
} a3;
};
#define INST3(x) (((struct f_inst3 *) x)->a3)
struct f_prefix { struct f_prefix {
ip_addr ip; ip_addr ip;
int len; int len;
@ -53,6 +64,7 @@ struct f_val {
union { union {
uint i; uint i;
u64 ec; u64 ec;
lcomm lc;
/* ip_addr ip; Folded into prefix */ /* ip_addr ip; Folded into prefix */
struct f_prefix px; struct f_prefix px;
char *s; char *s;
@ -168,8 +180,10 @@ void val_format(struct f_val v, buffer *buf);
#define T_PATH_MASK 0x23 /* mask for BGP path */ #define T_PATH_MASK 0x23 /* mask for BGP path */
#define T_PATH 0x24 /* BGP path */ #define T_PATH 0x24 /* BGP path */
#define T_CLIST 0x25 /* Community list */ #define T_CLIST 0x25 /* Community list */
#define T_ECLIST 0x26 /* Extended community list */ #define T_EC 0x26 /* Extended community value, u64 */
#define T_EC 0x27 /* Extended community value, u64 */ #define T_ECLIST 0x27 /* Extended community list */
#define T_LC 0x28 /* Large community value, lcomm */
#define T_LCLIST 0x29 /* Large community list */
#define T_RETURN 0x40 #define T_RETURN 0x40
#define T_SET 0x80 #define T_SET 0x80

17
filter/test.conf
View File

@ -27,6 +27,11 @@ function 'mkpair-a'(int a)
return (1, a); return (1, a);
} }
function mktrip(int a)
{
return (a, 2*a, 3*a);
}
function mkpath(int a; int b) function mkpath(int a; int b)
{ {
return [= a b 3 2 1 =]; return [= a b 3 2 1 =];
@ -89,6 +94,7 @@ clist l;
clist l2; clist l2;
eclist el; eclist el;
eclist el2; eclist el2;
lclist ll;
{ {
print "Entering path test..."; print "Entering path test...";
pm1 = / 4 3 2 1 /; pm1 = / 4 3 2 1 /;
@ -203,6 +209,17 @@ eclist el2;
print "eclist A isect B: ", filter( el, el2 ); print "eclist A isect B: ", filter( el, el2 );
print "eclist A \ B: ", delete( el, el2 ); print "eclist A \ B: ", delete( el, el2 );
ll = --- empty ---;
ll = add(ll, (ten, 20, 30));
ll = add(ll, (1000, 2000, 3000));
ll = add(ll, mktrip(100000));
print "LC list (10, 20, 30) (1000, 2000, 3000) (100000, 200000, 300000):";
print ll;
print "LC len: ", el.len;
print "Should be true: ", mktrip(1000) ~ ll, " ", ll ~ [(5,10,15), (10,20,30)], " ", ll ~ [(10,15..25,*)], " ", ll ~ [(ten, *, *)];
print "Should be false: ", mktrip(100) ~ ll, " ", ll ~ [(5,10,15), (10,21,30)], " ", ll ~ [(10,21..25,*)], " ", ll ~ [(11, *, *)];
print "LC filtered: ", filter(ll, [(5..15, *, *), (100000, 500..500000, *)]);
# test_roa(); # test_roa();
} }

127
nest/a-set.c
View File

@ -116,7 +116,7 @@ int
ec_set_format(struct adata *set, int from, byte *buf, uint size) ec_set_format(struct adata *set, int from, byte *buf, uint size)
{ {
u32 *z = int_set_get_data(set); u32 *z = int_set_get_data(set);
byte *end = buf + size - 24; byte *end = buf + size - 64;
int from2 = MAX(from, 0); int from2 = MAX(from, 0);
int to = int_set_get_size(set); int to = int_set_get_size(set);
int i; int i;
@ -141,6 +141,43 @@ ec_set_format(struct adata *set, int from, byte *buf, uint size)
return 0; return 0;
} }
int
lc_format(byte *buf, lcomm lc)
{
return bsprintf(buf, "(%d, %d, %d)", lc.asn, lc.ldp1, lc.ldp2);
}
int
lc_set_format(struct adata *set, int from, byte *buf, uint bufsize)
{
u32 *d = (u32 *) set->data;
byte *end = buf + bufsize - 64;
int from2 = MAX(from, 0);
int to = set->length / 4;
int i;
for (i = from2; i < to; i += 3)
{
if (buf > end)
{
if (from < 0)
strcpy(buf, "...");
else
buf[-1] = 0;
return i;
}
buf += bsprintf(buf, "(%d, %d, %d)", d[i], d[i+1], d[i+2]);
*buf++ = ' ';
}
if (i != from2)
buf--;
*buf = 0;
return 0;
}
int int
int_set_contains(struct adata *list, u32 val) int_set_contains(struct adata *list, u32 val)
{ {
@ -177,6 +214,24 @@ ec_set_contains(struct adata *list, u64 val)
return 0; return 0;
} }
int
lc_set_contains(struct adata *list, lcomm val)
{
if (!list)
return 0;
u32 *l = int_set_get_data(list);
int len = int_set_get_size(list);
int i;
for (i = 0; i < len; i += 3)
if (lc_match(l, i, val))
return 1;
return 0;
}
struct adata * struct adata *
int_set_add(struct linpool *pool, struct adata *list, u32 val) int_set_add(struct linpool *pool, struct adata *list, u32 val)
{ {
@ -208,13 +263,30 @@ ec_set_add(struct linpool *pool, struct adata *list, u64 val)
if (list) if (list)
memcpy(res->data, list->data, list->length); memcpy(res->data, list->data, list->length);
u32 *l = (u32 *) (res->data + res->length - 8); u32 *l = (u32 *) (res->data + olen);
l[0] = ec_hi(val); l[0] = ec_hi(val);
l[1] = ec_lo(val); l[1] = ec_lo(val);
return res; return res;
} }
struct adata *
lc_set_add(struct linpool *pool, struct adata *list, lcomm val)
{
if (lc_set_contains(list, val))
return list;
int olen = list ? list->length : 0;
struct adata *res = lp_alloc(pool, sizeof(struct adata) + olen + LCOMM_LENGTH);
res->length = olen + LCOMM_LENGTH;
if (list)
memcpy(res->data, list->data, list->length);
lc_put((u32 *) (res->data + olen), val);
return res;
}
struct adata * struct adata *
int_set_del(struct linpool *pool, struct adata *list, u32 val) int_set_del(struct linpool *pool, struct adata *list, u32 val)
@ -265,6 +337,27 @@ ec_set_del(struct linpool *pool, struct adata *list, u64 val)
return res; return res;
} }
struct adata *
lc_set_del(struct linpool *pool, struct adata *list, lcomm val)
{
if (!lc_set_contains(list, val))
return list;
struct adata *res;
res = lp_alloc(pool, sizeof(struct adata) + list->length - LCOMM_LENGTH);
res->length = list->length - LCOMM_LENGTH;
u32 *l = int_set_get_data(list);
u32 *k = int_set_get_data(res);
int len = int_set_get_size(list);
int i;
for (i=0; i < len; i += 3)
if (! lc_match(l, i, val))
k = lc_copy(k, l+i);
return res;
}
struct adata * struct adata *
int_set_union(struct linpool *pool, struct adata *l1, struct adata *l2) int_set_union(struct linpool *pool, struct adata *l1, struct adata *l2)
@ -328,3 +421,33 @@ ec_set_union(struct linpool *pool, struct adata *l1, struct adata *l2)
memcpy(res->data + l1->length, tmp, len); memcpy(res->data + l1->length, tmp, len);
return res; return res;
} }
struct adata *
lc_set_union(struct linpool *pool, struct adata *l1, struct adata *l2)
{
if (!l1)
return l2;
if (!l2)
return l1;
struct adata *res;
int len = int_set_get_size(l2);
u32 *l = int_set_get_data(l2);
u32 tmp[len];
u32 *k = tmp;
int i;
for (i = 0; i < len; i += 3)
if (!lc_set_contains(l1, lc_get(l, i)))
k = lc_copy(k, l+i);
if (k == tmp)
return l1;
len = (k - tmp) * 4;
res = lp_alloc(pool, sizeof(struct adata) + l1->length + len);
res->length = l1->length + len;
memcpy(res->data, l1->data, l1->length);
memcpy(res->data + l1->length, tmp, len);
return res;
}

32
nest/attrs.h
View File

@ -68,6 +68,7 @@ int as_path_match(struct adata *path, struct f_path_mask *mask);
/* Transitive bit (for first u32 half of EC) */ /* Transitive bit (for first u32 half of EC) */
#define EC_TBIT 0x40000000 #define EC_TBIT 0x40000000
#define ECOMM_LENGTH 8
static inline int int_set_get_size(struct adata *list) static inline int int_set_get_size(struct adata *list)
{ return list->length / 4; } { return list->length / 4; }
@ -75,6 +76,9 @@ static inline int int_set_get_size(struct adata *list)
static inline int ec_set_get_size(struct adata *list) static inline int ec_set_get_size(struct adata *list)
{ return list->length / 8; } { return list->length / 8; }
static inline int lc_set_get_size(struct adata *list)
{ return list->length / 12; }
static inline u32 *int_set_get_data(struct adata *list) static inline u32 *int_set_get_data(struct adata *list)
{ return (u32 *) list->data; } { return (u32 *) list->data; }
@ -98,17 +102,45 @@ static inline u64 ec_ip4(u64 kind, u64 key, u64 val)
static inline u64 ec_generic(u64 key, u64 val) static inline u64 ec_generic(u64 key, u64 val)
{ return (key << 32) | val; } { return (key << 32) | val; }
/* Large community value */
typedef struct lcomm {
u32 asn;
u32 ldp1;
u32 ldp2;
} lcomm;
#define LCOMM_LENGTH 12
static inline lcomm lc_get(const u32 *l, int i)
{ return (lcomm) { l[i], l[i+1], l[i+2] }; }
static inline void lc_put(u32 *l, lcomm v)
{ l[0] = v.asn; l[1] = v.ldp1; l[2] = v.ldp2; }
static inline int lc_match(const u32 *l, int i, lcomm v)
{ return (l[i] == v.asn && l[i+1] == v.ldp1 && l[i+2] == v.ldp2); }
static inline u32 *lc_copy(u32 *dst, const u32 *src)
{ memcpy(dst, src, LCOMM_LENGTH); return dst + 3; }
int int_set_format(struct adata *set, int way, int from, byte *buf, uint size); int int_set_format(struct adata *set, int way, int from, byte *buf, uint size);
int ec_format(byte *buf, u64 ec); int ec_format(byte *buf, u64 ec);
int ec_set_format(struct adata *set, int from, byte *buf, uint size); int ec_set_format(struct adata *set, int from, byte *buf, uint size);
int lc_format(byte *buf, lcomm lc);
int lc_set_format(struct adata *set, int from, byte *buf, uint size);
int int_set_contains(struct adata *list, u32 val); int int_set_contains(struct adata *list, u32 val);
int ec_set_contains(struct adata *list, u64 val); int ec_set_contains(struct adata *list, u64 val);
int lc_set_contains(struct adata *list, lcomm val);
struct adata *int_set_add(struct linpool *pool, struct adata *list, u32 val); struct adata *int_set_add(struct linpool *pool, struct adata *list, u32 val);
struct adata *ec_set_add(struct linpool *pool, struct adata *list, u64 val); struct adata *ec_set_add(struct linpool *pool, struct adata *list, u64 val);
struct adata *lc_set_add(struct linpool *pool, struct adata *list, lcomm val);
struct adata *int_set_del(struct linpool *pool, struct adata *list, u32 val); struct adata *int_set_del(struct linpool *pool, struct adata *list, u32 val);
struct adata *ec_set_del(struct linpool *pool, struct adata *list, u64 val); struct adata *ec_set_del(struct linpool *pool, struct adata *list, u64 val);
struct adata *lc_set_del(struct linpool *pool, struct adata *list, lcomm val);
struct adata *int_set_union(struct linpool *pool, struct adata *l1, struct adata *l2); struct adata *int_set_union(struct linpool *pool, struct adata *l1, struct adata *l2);
struct adata *ec_set_union(struct linpool *pool, struct adata *l1, struct adata *l2); struct adata *ec_set_union(struct linpool *pool, struct adata *l1, struct adata *l2);
struct adata *lc_set_union(struct linpool *pool, struct adata *l1, struct adata *l2);
#endif #endif

5
nest/route.h
View File

@ -442,7 +442,7 @@ typedef struct eattr {
#define EA_ALLOW_UNDEF 0x10000 /* ea_find: allow EAF_TYPE_UNDEF */ #define EA_ALLOW_UNDEF 0x10000 /* ea_find: allow EAF_TYPE_UNDEF */
#define EA_BIT(n) ((n) << 24) /* Used in bitfield accessors */ #define EA_BIT(n) ((n) << 24) /* Used in bitfield accessors */
#define EAF_TYPE_MASK 0x0f /* Mask with this to get type */ #define EAF_TYPE_MASK 0x1f /* Mask with this to get type */
#define EAF_TYPE_INT 0x01 /* 32-bit unsigned integer number */ #define EAF_TYPE_INT 0x01 /* 32-bit unsigned integer number */
#define EAF_TYPE_OPAQUE 0x02 /* Opaque byte string (not filterable) */ #define EAF_TYPE_OPAQUE 0x02 /* Opaque byte string (not filterable) */
#define EAF_TYPE_IP_ADDRESS 0x04 /* IP address */ #define EAF_TYPE_IP_ADDRESS 0x04 /* IP address */
@ -451,7 +451,8 @@ typedef struct eattr {
#define EAF_TYPE_BITFIELD 0x09 /* 32-bit embedded bitfield */ #define EAF_TYPE_BITFIELD 0x09 /* 32-bit embedded bitfield */
#define EAF_TYPE_INT_SET 0x0a /* Set of u32's (e.g., a community list) */ #define EAF_TYPE_INT_SET 0x0a /* Set of u32's (e.g., a community list) */
#define EAF_TYPE_EC_SET 0x0e /* Set of pairs of u32's - ext. community list */ #define EAF_TYPE_EC_SET 0x0e /* Set of pairs of u32's - ext. community list */
#define EAF_TYPE_UNDEF 0x0f /* `force undefined' entry */ #define EAF_TYPE_LC_SET 0x12 /* Set of triplets of u32's - large community list */
#define EAF_TYPE_UNDEF 0x1f /* `force undefined' entry */
#define EAF_EMBEDDED 0x01 /* Data stored in eattr.u.data (part of type spec) */ #define EAF_EMBEDDED 0x01 /* Data stored in eattr.u.data (part of type spec) */
#define EAF_VAR_LENGTH 0x02 /* Attribute length is variable (part of type spec) */ #define EAF_VAR_LENGTH 0x02 /* Attribute length is variable (part of type spec) */
#define EAF_ORIGINATED 0x40 /* The attribute has originated locally */ #define EAF_ORIGINATED 0x40 /* The attribute has originated locally */

15
nest/rt-attr.c
View File

@ -828,6 +828,18 @@ ea_show_ec_set(struct cli *c, struct adata *ad, byte *pos, byte *buf, byte *end)
} }
} }
static inline void
ea_show_lc_set(struct cli *c, struct adata *ad, byte *pos, byte *buf, byte *end)
{
int i = lc_set_format(ad, 0, pos, end - pos);
cli_printf(c, -1012, "\t%s", buf);
while (i)
{
i = lc_set_format(ad, i, buf, end - buf - 1);
cli_printf(c, -1012, "\t\t%s", buf);
}
}
/** /**
* ea_show - print an &eattr to CLI * ea_show - print an &eattr to CLI
* @c: destination CLI * @c: destination CLI
@ -892,6 +904,9 @@ ea_show(struct cli *c, eattr *e)
case EAF_TYPE_EC_SET: case EAF_TYPE_EC_SET:
ea_show_ec_set(c, ad, pos, buf, end); ea_show_ec_set(c, ad, pos, buf, end);
return; return;
case EAF_TYPE_LC_SET:
ea_show_lc_set(c, ad, pos, buf, end);
return;
case EAF_TYPE_UNDEF: case EAF_TYPE_UNDEF:
default: default:
bsprintf(pos, "<type %02x>", e->type); bsprintf(pos, "<type %02x>", e->type);

42
proto/bgp/attrs.c
View File

@ -289,6 +289,12 @@ bgp_check_ext_community(struct bgp_proto *p UNUSED, byte *a UNUSED, int len)
return ((len % 8) == 0) ? 0 : WITHDRAW; return ((len % 8) == 0) ? 0 : WITHDRAW;
} }
static int
bgp_check_large_community(struct bgp_proto *p UNUSED, byte *a UNUSED, int len)
{
return ((len % 12) == 0) ? 0 : WITHDRAW;
}
static struct attr_desc bgp_attr_table[] = { static struct attr_desc bgp_attr_table[] = {
{ NULL, -1, 0, 0, 0, /* Undefined */ { NULL, -1, 0, 0, 0, /* Undefined */
@ -325,7 +331,10 @@ static struct attr_desc bgp_attr_table[] = {
{ "as4_path", -1, BAF_OPTIONAL | BAF_TRANSITIVE, EAF_TYPE_OPAQUE, 1, /* BA_AS4_PATH */ { "as4_path", -1, BAF_OPTIONAL | BAF_TRANSITIVE, EAF_TYPE_OPAQUE, 1, /* BA_AS4_PATH */
NULL, NULL }, NULL, NULL },
{ "as4_aggregator", -1, BAF_OPTIONAL | BAF_TRANSITIVE, EAF_TYPE_OPAQUE, 1, /* BA_AS4_PATH */ { "as4_aggregator", -1, BAF_OPTIONAL | BAF_TRANSITIVE, EAF_TYPE_OPAQUE, 1, /* BA_AS4_PATH */
NULL, NULL } NULL, NULL },
[BA_LARGE_COMMUNITY] =
{ "large_community", -1, BAF_OPTIONAL | BAF_TRANSITIVE, EAF_TYPE_LC_SET, 1,
bgp_check_large_community, NULL }
}; };
/* BA_AS4_PATH is type EAF_TYPE_OPAQUE and not type EAF_TYPE_AS_PATH. /* BA_AS4_PATH is type EAF_TYPE_OPAQUE and not type EAF_TYPE_AS_PATH.
@ -575,7 +584,7 @@ bgp_encode_attrs(struct bgp_proto *p, byte *w, ea_list *attrs, int remains)
len = bgp_get_attr_len(a); len = bgp_get_attr_len(a);
/* Skip empty sets */ /* Skip empty sets */
if (((type == EAF_TYPE_INT_SET) || (type == EAF_TYPE_EC_SET)) && (len == 0)) if (((type == EAF_TYPE_INT_SET) || (type == EAF_TYPE_EC_SET) || (type == EAF_TYPE_LC_SET)) && (len == 0))
continue; continue;
if (remains < len + 4) if (remains < len + 4)
@ -601,6 +610,7 @@ bgp_encode_attrs(struct bgp_proto *p, byte *w, ea_list *attrs, int remains)
break; break;
} }
case EAF_TYPE_INT_SET: case EAF_TYPE_INT_SET:
case EAF_TYPE_LC_SET:
case EAF_TYPE_EC_SET: case EAF_TYPE_EC_SET:
{ {
u32 *z = int_set_get_data(a->u.ptr); u32 *z = int_set_get_data(a->u.ptr);
@ -683,6 +693,25 @@ bgp_normalize_ec_set(struct adata *ad, u32 *src, int internal)
qsort(dst, ad->length / 8, 8, (int(*)(const void *, const void *)) bgp_compare_ec); qsort(dst, ad->length / 8, 8, (int(*)(const void *, const void *)) bgp_compare_ec);
} }
static int
bgp_compare_lc(const u32 *x, const u32 *y)
{
if (x[0] != y[0])
return (x[0] > y[0]) ? 1 : -1;
if (x[1] != y[1])
return (x[1] > y[1]) ? 1 : -1;
if (x[2] != y[2])
return (x[2] > y[2]) ? 1 : -1;
return 0;
}
static inline void
bgp_normalize_lc_set(u32 *dest, u32 *src, unsigned cnt)
{
memcpy(dest, src, LCOMM_LENGTH * cnt);
qsort(dest, cnt, LCOMM_LENGTH, (int(*)(const void *, const void *)) bgp_compare_lc);
}
static void static void
bgp_rehash_buckets(struct bgp_proto *p) bgp_rehash_buckets(struct bgp_proto *p)
{ {
@ -827,6 +856,14 @@ bgp_get_bucket(struct bgp_proto *p, net *n, ea_list *attrs, int originate)
d->u.ptr = z; d->u.ptr = z;
break; break;
} }
case EAF_TYPE_LC_SET:
{
struct adata *z = alloca(sizeof(struct adata) + d->u.ptr->length);
z->length = d->u.ptr->length;
bgp_normalize_lc_set((u32 *) z->data, (u32 *) d->u.ptr->data, z->length / LCOMM_LENGTH);
d->u.ptr = z;
break;
}
default: ; default: ;
} }
d++; d++;
@ -1797,6 +1834,7 @@ bgp_decode_attrs(struct bgp_conn *conn, byte *attr, uint len, struct linpool *po
ipa_ntoh(*(ip_addr *)ad->data); ipa_ntoh(*(ip_addr *)ad->data);
break; break;
case EAF_TYPE_INT_SET: case EAF_TYPE_INT_SET:
case EAF_TYPE_LC_SET:
case EAF_TYPE_EC_SET: case EAF_TYPE_EC_SET:
{ {
u32 *z = (u32 *) ad->data; u32 *z = (u32 *) ad->data;

1
proto/bgp/bgp.h
View File

@ -308,6 +308,7 @@ void bgp_log_error(struct bgp_proto *p, u8 class, char *msg, unsigned code, unsi
#define BA_EXT_COMMUNITY 0x10 /* [RFC4360] */ #define BA_EXT_COMMUNITY 0x10 /* [RFC4360] */
#define BA_AS4_PATH 0x11 /* [RFC4893] */ #define BA_AS4_PATH 0x11 /* [RFC4893] */
#define BA_AS4_AGGREGATOR 0x12 #define BA_AS4_AGGREGATOR 0x12
#define BA_LARGE_COMMUNITY 0x1e /* [draft-ietf-idr-large-community] */
/* BGP connection states */ /* BGP connection states */

4
proto/bgp/config.Y
View File

@ -27,7 +27,7 @@ CF_KEYWORDS(BGP, LOCAL, NEIGHBOR, AS, HOLD, TIME, CONNECT, RETRY,
INTERPRET, COMMUNITIES, BGP_ORIGINATOR_ID, BGP_CLUSTER_LIST, IGP, INTERPRET, COMMUNITIES, BGP_ORIGINATOR_ID, BGP_CLUSTER_LIST, IGP,
TABLE, GATEWAY, DIRECT, RECURSIVE, MED, TTL, SECURITY, DETERMINISTIC, TABLE, GATEWAY, DIRECT, RECURSIVE, MED, TTL, SECURITY, DETERMINISTIC,
SECONDARY, ALLOW, BFD, ADD, PATHS, RX, TX, GRACEFUL, RESTART, AWARE, SECONDARY, ALLOW, BFD, ADD, PATHS, RX, TX, GRACEFUL, RESTART, AWARE,
CHECK, LINK, PORT, EXTENDED, MESSAGES, SETKEY) CHECK, LINK, PORT, EXTENDED, MESSAGES, SETKEY, BGP_LARGE_COMMUNITY)
CF_GRAMMAR CF_GRAMMAR
@ -159,6 +159,8 @@ CF_ADDTO(dynamic_attr, BGP_CLUSTER_LIST
{ $$ = f_new_dynamic_attr(EAF_TYPE_INT_SET, T_CLIST, EA_CODE(EAP_BGP, BA_CLUSTER_LIST)); }) { $$ = f_new_dynamic_attr(EAF_TYPE_INT_SET, T_CLIST, EA_CODE(EAP_BGP, BA_CLUSTER_LIST)); })
CF_ADDTO(dynamic_attr, BGP_EXT_COMMUNITY CF_ADDTO(dynamic_attr, BGP_EXT_COMMUNITY
{ $$ = f_new_dynamic_attr(EAF_TYPE_EC_SET, T_ECLIST, EA_CODE(EAP_BGP, BA_EXT_COMMUNITY)); }) { $$ = f_new_dynamic_attr(EAF_TYPE_EC_SET, T_ECLIST, EA_CODE(EAP_BGP, BA_EXT_COMMUNITY)); })
CF_ADDTO(dynamic_attr, BGP_LARGE_COMMUNITY
{ $$ = f_new_dynamic_attr(EAF_TYPE_LC_SET, T_LCLIST, EA_CODE(EAP_BGP, BA_LARGE_COMMUNITY)); })