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BGP: Support for large communities
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)
parent
f51b1f5565
commit
66dbdbd993
@ -36,6 +36,7 @@ f_valid_set_type(int type)
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case T_ENUM:
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case T_IP:
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case T_EC:
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case T_LC:
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return 1;
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default:
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@ -148,6 +149,9 @@ f_generate_empty(struct f_inst *dyn)
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case EAF_TYPE_EC_SET:
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e->aux = T_ECLIST;
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break;
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case EAF_TYPE_LC_SET:
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e->aux = T_LCLIST;
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break;
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default:
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cf_error("Can't empty that attribute");
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}
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@ -268,14 +272,44 @@ f_generate_ec(u16 kind, struct f_inst *tk, struct f_inst *tv)
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return rv;
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}
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static inline struct f_inst *
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f_generate_lc(struct f_inst *t1, struct f_inst *t2, struct f_inst *t3)
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{
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struct f_inst *rv;
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if ((t1->code == 'c') && (t2->code == 'c') && (t3->code == 'c')) {
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if ((t1->aux != T_INT) || (t2->aux != T_INT) || (t3->aux != T_INT))
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cf_error( "LC - Can't operate with value of non-integer type in tuple constructor");
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rv = f_new_inst();
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rv->code = 'C';
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NEW_F_VAL;
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rv->a1.p = val;
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val->type = T_LC;
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val->val.lc = (lcomm) { t1->a2.i, t2->a2.i, t3->a2.i };
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}
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else
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{
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rv = cfg_allocz(sizeof(struct f_inst3));
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rv->lineno = ifs->lino;
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rv->code = P('m','l');
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rv->a1.p = t1;
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rv->a2.p = t2;
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INST3(rv).p = t3;
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}
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return rv;
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}
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CF_DECLS
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CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
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ACCEPT, REJECT, ERROR, QUITBIRD,
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INT, BOOL, IP, PREFIX, PAIR, QUAD, EC,
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SET, STRING, BGPMASK, BGPPATH, CLIST, ECLIST,
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INT, BOOL, IP, PREFIX, PAIR, QUAD, EC, LC,
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SET, STRING, BGPMASK, BGPPATH, CLIST, ECLIST, LCLIST,
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IF, THEN, ELSE, CASE,
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TRUE, FALSE, RT, RO, UNKNOWN, GENERIC,
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FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, CAST, DEST, IFNAME, IFINDEX,
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@ -327,17 +361,20 @@ type:
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| PAIR { $$ = T_PAIR; }
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| QUAD { $$ = T_QUAD; }
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| EC { $$ = T_EC; }
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| LC { $$ = T_LC; }
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| STRING { $$ = T_STRING; }
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| BGPMASK { $$ = T_PATH_MASK; }
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| BGPPATH { $$ = T_PATH; }
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| CLIST { $$ = T_CLIST; }
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| ECLIST { $$ = T_ECLIST; }
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| LCLIST { $$ = T_LCLIST; }
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| type SET {
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switch ($1) {
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case T_INT:
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case T_PAIR:
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case T_QUAD:
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case T_EC:
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case T_LC:
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case T_IP:
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$$ = T_SET;
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break;
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@ -657,6 +694,7 @@ constant:
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constructor:
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'(' term ',' term ')' { $$ = f_generate_dpair($2, $4); }
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| '(' ec_kind ',' term ',' term ')' { $$ = f_generate_ec($2, $4, $6); }
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| '(' term ',' term ',' term ')' { $$ = f_generate_lc($2, $4, $6); }
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;
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@ -767,6 +805,7 @@ term:
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| '+' EMPTY '+' { $$ = f_new_inst(); $$->code = 'E'; $$->aux = T_PATH; }
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| '-' EMPTY '-' { $$ = f_new_inst(); $$->code = 'E'; $$->aux = T_CLIST; }
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| '-' '-' EMPTY '-' '-' { $$ = f_new_inst(); $$->code = 'E'; $$->aux = T_ECLIST; }
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| '-' '-' '-' EMPTY '-' '-' '-' { $$ = f_new_inst(); $$->code = 'E'; $$->aux = T_LCLIST; }
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| PREPEND '(' term ',' term ')' { $$ = f_new_inst(); $$->code = P('A','p'); $$->a1.p = $3; $$->a2.p = $5; }
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| ADD '(' term ',' term ')' { $$ = f_new_inst(); $$->code = P('C','a'); $$->a1.p = $3; $$->a2.p = $5; $$->aux = 'a'; }
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| DELETE '(' term ',' term ')' { $$ = f_new_inst(); $$->code = P('C','a'); $$->a1.p = $3; $$->a2.p = $5; $$->aux = 'd'; }
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171
filter/filter.c
171
filter/filter.c
@ -106,6 +106,18 @@ u64_cmp(u64 i1, u64 i2)
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return (int)(i1 > i2) - (int)(i1 < i2);
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}
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static inline int
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lcomm_cmp(lcomm v1, lcomm v2)
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{
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if (v1.asn != v2.asn)
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return (v1.asn > v2.asn) ? 1 : -1;
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if (v1.ldp1 != v2.ldp1)
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return (v1.ldp1 > v2.ldp1) ? 1 : -1;
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if (v1.ldp2 != v2.ldp2)
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return (v1.ldp2 > v2.ldp2) ? 1 : -1;
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return 0;
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}
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/**
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* val_compare - compare two values
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* @v1: first value
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@ -149,6 +161,8 @@ val_compare(struct f_val v1, struct f_val v2)
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return uint_cmp(v1.val.i, v2.val.i);
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case T_EC:
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return u64_cmp(v1.val.ec, v2.val.ec);
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case T_LC:
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return lcomm_cmp(v1.val.lc, v2.val.lc);
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case T_IP:
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return ipa_compare(v1.val.px.ip, v2.val.px.ip);
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case T_PREFIX:
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@ -214,6 +228,7 @@ val_same(struct f_val v1, struct f_val v2)
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case T_PATH:
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case T_CLIST:
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case T_ECLIST:
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case T_LCLIST:
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return adata_same(v1.val.ad, v2.val.ad);
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case T_SET:
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return same_tree(v1.val.t, v2.val.t);
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@ -266,6 +281,10 @@ static inline int
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eclist_set_type(struct f_tree *set)
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{ return set->from.type == T_EC; }
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static inline int
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lclist_set_type(struct f_tree *set)
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{ return set->from.type == T_LC; }
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static int
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clist_match_set(struct adata *clist, struct f_tree *set)
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{
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@ -311,6 +330,30 @@ eclist_match_set(struct adata *list, struct f_tree *set)
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return 0;
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}
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static int
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lclist_match_set(struct adata *list, struct f_tree *set)
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{
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if (!list)
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return 0;
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if (!lclist_set_type(set))
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return CMP_ERROR;
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struct f_val v;
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u32 *l = int_set_get_data(list);
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int len = int_set_get_size(list);
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int i;
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v.type = T_LC;
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for (i = 0; i < len; i += 3) {
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v.val.lc = lc_get(l, i);
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if (find_tree(set, v))
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return 1;
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}
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return 0;
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}
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static struct adata *
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clist_filter(struct linpool *pool, struct adata *list, struct f_val set, int pos)
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{
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@ -380,6 +423,38 @@ eclist_filter(struct linpool *pool, struct adata *list, struct f_val set, int po
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return res;
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}
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static struct adata *
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lclist_filter(struct linpool *pool, struct adata *list, struct f_val set, int pos)
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{
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if (!list)
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return NULL;
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int tree = (set.type == T_SET); /* 1 -> set is T_SET, 0 -> set is T_CLIST */
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struct f_val v;
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int len = int_set_get_size(list);
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u32 *l = int_set_get_data(list);
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u32 tmp[len];
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u32 *k = tmp;
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int i;
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v.type = T_LC;
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for (i = 0; i < len; i += 3) {
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v.val.lc = lc_get(l, i);
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/* pos && member(val, set) || !pos && !member(val, set), member() depends on tree */
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if ((tree ? !!find_tree(set.val.t, v) : lc_set_contains(set.val.ad, v.val.lc)) == pos)
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k = lc_copy(k, l+i);
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}
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int nl = (k - tmp) * 4;
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if (nl == list->length)
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return list;
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struct adata *res = adata_empty(pool, nl);
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memcpy(res->data, tmp, nl);
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return res;
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}
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/**
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* val_in_range - implement |~| operator
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* @v1: element
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@ -407,6 +482,9 @@ val_in_range(struct f_val v1, struct f_val v2)
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if ((v1.type == T_EC) && (v2.type == T_ECLIST))
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return ec_set_contains(v2.val.ad, v1.val.ec);
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if ((v1.type == T_LC) && (v2.type == T_LCLIST))
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return lc_set_contains(v2.val.ad, v1.val.lc);
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if ((v1.type == T_STRING) && (v2.type == T_STRING))
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return patmatch(v2.val.s, v1.val.s);
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@ -433,6 +511,9 @@ val_in_range(struct f_val v1, struct f_val v2)
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if (v1.type == T_ECLIST)
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return eclist_match_set(v1.val.ad, v2.val.t);
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if (v1.type == T_LCLIST)
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return lclist_match_set(v1.val.ad, v2.val.t);
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if (v1.type == T_PATH)
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return as_path_match_set(v1.val.ad, v2.val.t);
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@ -457,12 +538,14 @@ val_format(struct f_val v, buffer *buf)
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case T_PAIR: buffer_print(buf, "(%u,%u)", v.val.i >> 16, v.val.i & 0xffff); return;
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case T_QUAD: buffer_print(buf, "%R", v.val.i); return;
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case T_EC: ec_format(buf2, v.val.ec); buffer_print(buf, "%s", buf2); return;
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case T_LC: lc_format(buf2, v.val.lc); buffer_print(buf, "%s", buf2); return;
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case T_PREFIX_SET: trie_format(v.val.ti, buf); return;
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case T_SET: tree_format(v.val.t, buf); return;
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case T_ENUM: buffer_print(buf, "(enum %x)%u", v.type, v.val.i); return;
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case T_PATH: as_path_format(v.val.ad, buf2, 1000); buffer_print(buf, "(path %s)", buf2); return;
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case T_CLIST: int_set_format(v.val.ad, 1, -1, buf2, 1000); buffer_print(buf, "(clist %s)", buf2); return;
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case T_ECLIST: ec_set_format(v.val.ad, -1, buf2, 1000); buffer_print(buf, "(eclist %s)", buf2); return;
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case T_LCLIST: lc_set_format(v.val.ad, -1, buf2, 1000); buffer_print(buf, "(lclist %s)", buf2); return;
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case T_PATH_MASK: pm_format(v.val.path_mask, buf); return;
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default: buffer_print(buf, "[unknown type %x]", v.type); return;
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}
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@ -656,6 +739,7 @@ interpret(struct f_inst *what)
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runtime("Can't operate with value of non-integer type in EC constructor");
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val = v2.val.i;
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/* XXXX */
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res.type = T_EC;
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if (what->aux == EC_GENERIC) {
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@ -677,6 +761,24 @@ interpret(struct f_inst *what)
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break;
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}
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case P('m','l'):
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{
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TWOARGS;
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/* Third argument hack */
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struct f_val v3 = interpret(INST3(what).p);
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if (v3.type & T_RETURN)
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return v3;
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if ((v1.type != T_INT) || (v2.type != T_INT) || (v3.type != T_INT))
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runtime( "Can't operate with value of non-integer type in LC constructor" );
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res.type = T_LC;
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res.val.lc = (lcomm) { v1.val.i, v2.val.i, v3.val.i };
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break;
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}
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/* Relational operators */
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#define COMPARE(x) \
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@ -912,6 +1014,13 @@ interpret(struct f_inst *what)
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break;
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}
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/* The same special case for lc_set */
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if ((what->aux & EAF_TYPE_MASK) == EAF_TYPE_LC_SET) {
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res.type = T_LCLIST;
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res.val.ad = adata_empty(f_pool, 0);
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break;
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}
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/* Undefined value */
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res.type = T_VOID;
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break;
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@ -951,6 +1060,10 @@ interpret(struct f_inst *what)
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res.type = T_ECLIST;
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res.val.ad = e->u.ptr;
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break;
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case EAF_TYPE_LC_SET:
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res.type = T_LCLIST;
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res.val.ad = e->u.ptr;
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break;
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case EAF_TYPE_UNDEF:
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res.type = T_VOID;
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break;
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@ -1041,6 +1154,11 @@ interpret(struct f_inst *what)
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runtime( "Setting eclist attribute to non-eclist value" );
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l->attrs[0].u.ptr = v1.val.ad;
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break;
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case EAF_TYPE_LC_SET:
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if (v1.type != T_LCLIST)
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runtime( "Setting lclist attribute to non-lclist value" );
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l->attrs[0].u.ptr = v1.val.ad;
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break;
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case EAF_TYPE_UNDEF:
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if (v1.type != T_VOID)
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runtime( "Setting void attribute to non-void value" );
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@ -1082,6 +1200,7 @@ interpret(struct f_inst *what)
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case T_PATH: res.val.i = as_path_getlen(v1.val.ad); break;
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case T_CLIST: res.val.i = int_set_get_size(v1.val.ad); break;
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case T_ECLIST: res.val.i = ec_set_get_size(v1.val.ad); break;
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case T_LCLIST: res.val.i = lc_set_get_size(v1.val.ad); break;
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default: runtime( "Prefix, path, clist or eclist expected" );
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}
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break;
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@ -1277,7 +1396,7 @@ interpret(struct f_inst *what)
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else if (v2.type == T_ECLIST)
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arg_set = 2;
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else if (v2.type != T_EC)
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runtime("Can't add/delete non-pair");
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runtime("Can't add/delete non-ec");
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res.type = T_ECLIST;
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switch (what->aux)
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@ -1308,8 +1427,50 @@ interpret(struct f_inst *what)
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bug("unknown Ca operation");
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}
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}
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else if (v1.type == T_LCLIST)
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{
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/* Large community list */
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int arg_set = 0;
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/* v2.val is either LC or LC-set */
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if ((v2.type == T_SET) && lclist_set_type(v2.val.t))
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arg_set = 1;
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else if (v2.type == T_LCLIST)
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arg_set = 2;
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else if (v2.type != T_LC)
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runtime("Can't add/delete non-lc");
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res.type = T_LCLIST;
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switch (what->aux)
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{
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case 'a':
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if (arg_set == 1)
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runtime("Can't add set");
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else if (!arg_set)
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res.val.ad = lc_set_add(f_pool, v1.val.ad, v2.val.lc);
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else
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res.val.ad = lc_set_union(f_pool, v1.val.ad, v2.val.ad);
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break;
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case 'd':
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if (!arg_set)
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res.val.ad = lc_set_del(f_pool, v1.val.ad, v2.val.lc);
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else
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res.val.ad = lclist_filter(f_pool, v1.val.ad, v2, 0);
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break;
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case 'f':
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if (!arg_set)
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runtime("Can't filter lc");
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res.val.ad = lclist_filter(f_pool, v1.val.ad, v2, 1);
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break;
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default:
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bug("unknown Ca operation");
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}
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}
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else
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runtime("Can't add/delete to non-(e)clist");
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runtime("Can't add/delete to non-[e|l]clist");
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break;
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@ -1401,6 +1562,12 @@ i_same(struct f_inst *f1, struct f_inst *f2)
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case '~': TWOARGS; break;
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case P('d','e'): ONEARG; break;
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case P('m','l'):
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TWOARGS;
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if (!i_same(INST3(f1).p, INST3(f2).p))
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return 0;
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break;
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case 's':
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ARG(v2, a2.p);
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{
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@ -38,6 +38,17 @@ struct f_inst_roa_check {
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struct roa_table_config *rtc;
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};
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struct f_inst3 {
|
||||
struct f_inst i;
|
||||
union {
|
||||
int i;
|
||||
void *p;
|
||||
} a3;
|
||||
};
|
||||
|
||||
#define INST3(x) (((struct f_inst3 *) x)->a3)
|
||||
|
||||
|
||||
struct f_prefix {
|
||||
ip_addr ip;
|
||||
int len;
|
||||
@ -53,6 +64,7 @@ struct f_val {
|
||||
union {
|
||||
uint i;
|
||||
u64 ec;
|
||||
lcomm lc;
|
||||
/* ip_addr ip; Folded into prefix */
|
||||
struct f_prefix px;
|
||||
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 0x24 /* BGP path */
|
||||
#define T_CLIST 0x25 /* Community list */
|
||||
#define T_ECLIST 0x26 /* Extended community list */
|
||||
#define T_EC 0x27 /* Extended community value, u64 */
|
||||
#define T_EC 0x26 /* 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_SET 0x80
|
||||
|
||||
@ -27,6 +27,11 @@ function 'mkpair-a'(int a)
|
||||
return (1, a);
|
||||
}
|
||||
|
||||
function mktrip(int a)
|
||||
{
|
||||
return (a, 2*a, 3*a);
|
||||
}
|
||||
|
||||
function mkpath(int a; int b)
|
||||
{
|
||||
return [= a b 3 2 1 =];
|
||||
@ -89,6 +94,7 @@ clist l;
|
||||
clist l2;
|
||||
eclist el;
|
||||
eclist el2;
|
||||
lclist ll;
|
||||
{
|
||||
print "Entering path test...";
|
||||
pm1 = / 4 3 2 1 /;
|
||||
@ -203,6 +209,17 @@ eclist el2;
|
||||
print "eclist A isect B: ", filter( 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();
|
||||
}
|
||||
|
||||
|
||||
127
nest/a-set.c
127
nest/a-set.c
@ -116,7 +116,7 @@ int
|
||||
ec_set_format(struct adata *set, int from, byte *buf, uint size)
|
||||
{
|
||||
u32 *z = int_set_get_data(set);
|
||||
byte *end = buf + size - 24;
|
||||
byte *end = buf + size - 64;
|
||||
int from2 = MAX(from, 0);
|
||||
int to = int_set_get_size(set);
|
||||
int i;
|
||||
@ -141,6 +141,43 @@ ec_set_format(struct adata *set, int from, byte *buf, uint size)
|
||||
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_set_contains(struct adata *list, u32 val)
|
||||
{
|
||||
@ -177,6 +214,24 @@ ec_set_contains(struct adata *list, u64 val)
|
||||
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 *
|
||||
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)
|
||||
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[1] = ec_lo(val);
|
||||
|
||||
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 *
|
||||
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;
|
||||
}
|
||||
|
||||
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 *
|
||||
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);
|
||||
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
32
nest/attrs.h
@ -68,6 +68,7 @@ int as_path_match(struct adata *path, struct f_path_mask *mask);
|
||||
/* Transitive bit (for first u32 half of EC) */
|
||||
#define EC_TBIT 0x40000000
|
||||
|
||||
#define ECOMM_LENGTH 8
|
||||
|
||||
static inline int int_set_get_size(struct adata *list)
|
||||
{ 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)
|
||||
{ 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)
|
||||
{ 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)
|
||||
{ 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 ec_format(byte *buf, u64 ec);
|
||||
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 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 *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 *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 *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
|
||||
|
||||
@ -442,7 +442,7 @@ typedef struct eattr {
|
||||
#define EA_ALLOW_UNDEF 0x10000 /* ea_find: allow EAF_TYPE_UNDEF */
|
||||
#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_OPAQUE 0x02 /* Opaque byte string (not filterable) */
|
||||
#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_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_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_VAR_LENGTH 0x02 /* Attribute length is variable (part of type spec) */
|
||||
#define EAF_ORIGINATED 0x40 /* The attribute has originated locally */
|
||||
|
||||
@ -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
|
||||
* @c: destination CLI
|
||||
@ -892,6 +904,9 @@ ea_show(struct cli *c, eattr *e)
|
||||
case EAF_TYPE_EC_SET:
|
||||
ea_show_ec_set(c, ad, pos, buf, end);
|
||||
return;
|
||||
case EAF_TYPE_LC_SET:
|
||||
ea_show_lc_set(c, ad, pos, buf, end);
|
||||
return;
|
||||
case EAF_TYPE_UNDEF:
|
||||
default:
|
||||
bsprintf(pos, "<type %02x>", e->type);
|
||||
|
||||
@ -289,6 +289,12 @@ bgp_check_ext_community(struct bgp_proto *p UNUSED, byte *a UNUSED, int len)
|
||||
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[] = {
|
||||
{ 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 */
|
||||
NULL, NULL },
|
||||
{ "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.
|
||||
@ -575,7 +584,7 @@ bgp_encode_attrs(struct bgp_proto *p, byte *w, ea_list *attrs, int remains)
|
||||
len = bgp_get_attr_len(a);
|
||||
|
||||
/* 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;
|
||||
|
||||
if (remains < len + 4)
|
||||
@ -601,6 +610,7 @@ bgp_encode_attrs(struct bgp_proto *p, byte *w, ea_list *attrs, int remains)
|
||||
break;
|
||||
}
|
||||
case EAF_TYPE_INT_SET:
|
||||
case EAF_TYPE_LC_SET:
|
||||
case EAF_TYPE_EC_SET:
|
||||
{
|
||||
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);
|
||||
}
|
||||
|
||||
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
|
||||
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;
|
||||
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: ;
|
||||
}
|
||||
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);
|
||||
break;
|
||||
case EAF_TYPE_INT_SET:
|
||||
case EAF_TYPE_LC_SET:
|
||||
case EAF_TYPE_EC_SET:
|
||||
{
|
||||
u32 *z = (u32 *) ad->data;
|
||||
|
||||
@ -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_AS4_PATH 0x11 /* [RFC4893] */
|
||||
#define BA_AS4_AGGREGATOR 0x12
|
||||
#define BA_LARGE_COMMUNITY 0x1e /* [draft-ietf-idr-large-community] */
|
||||
|
||||
/* BGP connection states */
|
||||
|
||||
|
||||
@ -27,7 +27,7 @@ CF_KEYWORDS(BGP, LOCAL, NEIGHBOR, AS, HOLD, TIME, CONNECT, RETRY,
|
||||
INTERPRET, COMMUNITIES, BGP_ORIGINATOR_ID, BGP_CLUSTER_LIST, IGP,
|
||||
TABLE, GATEWAY, DIRECT, RECURSIVE, MED, TTL, SECURITY, DETERMINISTIC,
|
||||
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
|
||||
|
||||
@ -159,6 +159,8 @@ CF_ADDTO(dynamic_attr, BGP_CLUSTER_LIST
|
||||
{ $$ = f_new_dynamic_attr(EAF_TYPE_INT_SET, T_CLIST, EA_CODE(EAP_BGP, BA_CLUSTER_LIST)); })
|
||||
CF_ADDTO(dynamic_attr, BGP_EXT_COMMUNITY
|
||||
{ $$ = 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)); })
|
||||
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user