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Filter: Add literal for empty set

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Add literal for empty set [], which works both for tree-based sets
and prefix sets by using existing constant promotion mechanism.

Minor changes by committer.
This commit is contained in:
Alexander Zubkov 2022-03-04 14:07:58 +01:00 committed by Ondrej Zajicek (work)
parent bfad73ee00
commit 931c6ff51a
6 changed files with 90 additions and 5 deletions
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2
filter/config.Y
View File

@ -674,6 +674,7 @@ bgp_path:
bgp_path_tail:
NUM bgp_path_tail { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PATH_MASK_ITEM, .val.pmi = { .asn = $1, .kind = PM_ASN, }, }); $$->next = $2; }
| NUM DDOT NUM bgp_path_tail { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PATH_MASK_ITEM, .val.pmi = { .from = $1, .to = $3, .kind = PM_ASN_RANGE }, }); $$->next = $4; }
| '[' ']' bgp_path_tail { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PATH_MASK_ITEM, .val.pmi = { .set = NULL, .kind = PM_ASN_SET }, }); $$->next = $3; }
| '[' set_items ']' bgp_path_tail {
if ($2->from.type != T_INT) cf_error("Only integer sets allowed in path mask");
$$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PATH_MASK_ITEM, .val.pmi = { .set = build_tree($2), .kind = PM_ASN_SET }, }); $$->next = $4;
@ -693,6 +694,7 @@ constant:
| fipa { $$ = f_new_inst(FI_CONSTANT, $1); }
| VPN_RD { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_RD, .val.ec = $1, }); }
| net_ { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_NET, .val.net = $1, }); }
| '[' ']' { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_SET, .val.t = NULL, }); }
| '[' set_items ']' {
DBG( "We've got a set here..." );
$$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_SET, .val.t = build_tree($2), });

14
filter/data.c
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@ -79,6 +79,8 @@ f_type_element_type(enum f_type t)
};
}
const struct f_trie f_const_empty_trie = { .ipv4 = -1, };
const struct f_val f_const_empty_path = {
.type = T_PATH,
.val.ad = &null_adata,
@ -91,6 +93,9 @@ const struct f_val f_const_empty_path = {
}, f_const_empty_lclist = {
.type = T_LCLIST,
.val.ad = &null_adata,
}, f_const_empty_prefix_set = {
.type = T_PREFIX_SET,
.val.ti = &f_const_empty_trie,
};
static struct adata *
@ -301,6 +306,12 @@ val_same(const struct f_val *v1, const struct f_val *v2)
int
clist_set_type(const struct f_tree *set, struct f_val *v)
{
if (!set)
{
v->type = T_VOID;
return 1;
}
switch (set->from.type)
{
case T_PAIR:
@ -537,6 +548,9 @@ val_in_range(const struct f_val *v1, const struct f_val *v2)
if (v2->type != T_SET)
return F_CMP_ERROR;
if (!v2->val.t)
return 0;
/* With integrated Quad<->IP implicit conversion */
if ((v1->type == v2->val.t->from.type) ||
((v1->type == T_QUAD) && val_is_ip4(&(v2->val.t->from)) && val_is_ip4(&(v2->val.t->to))))

8
filter/data.h
View File

@ -279,11 +279,11 @@ int val_in_range(const struct f_val *v1, const struct f_val *v2);
int clist_set_type(const struct f_tree *set, struct f_val *v);
static inline int eclist_set_type(const struct f_tree *set)
{ return set->from.type == T_EC; }
{ return !set || set->from.type == T_EC; }
static inline int lclist_set_type(const struct f_tree *set)
{ return set->from.type == T_LC; }
{ return !set || set->from.type == T_LC; }
static inline int path_set_type(const struct f_tree *set)
{ return set->from.type == T_INT; }
{ return !set || set->from.type == T_INT; }
const struct adata *clist_filter(struct linpool *pool, const struct adata *list, const struct f_val *set, int pos);
const struct adata *eclist_filter(struct linpool *pool, const struct adata *list, const struct f_val *set, int pos);
@ -299,7 +299,7 @@ undef_value(struct f_val v)
(v.val.ad == &null_adata);
}
extern const struct f_val f_const_empty_path, f_const_empty_clist, f_const_empty_eclist, f_const_empty_lclist;
extern const struct f_val f_const_empty_path, f_const_empty_clist, f_const_empty_eclist, f_const_empty_lclist, f_const_empty_prefix_set;
enum filter_return f_eval(const struct f_line *expr, struct linpool *tmp_pool, struct f_val *pres);

5
filter/decl.m4
View File

@ -501,6 +501,11 @@ f_const_promotion(struct f_inst *arg, enum f_type want)
return 1;
}
else if ((c->type == T_SET) && (!c->val.t) && (want == T_PREFIX_SET)) {
*c = f_const_empty_prefix_set;
return 1;
}
return 0;
}

2
filter/f-inst.c
View File

@ -401,7 +401,7 @@
break;
case T_SET:
if (vv(i).val.t->from.type != T_INT)
if (!path_set_type(vv(i).val.t))
runtime("Only integer sets allowed in path mask");
pm->item[i] = (struct f_path_mask_item) {

64
filter/test.conf
View File

@ -130,12 +130,18 @@ define is3 = [5, 17, 2, 11, 8, 15, 3, 19];
function t_int_set()
int set is;
{
is = [];
bt_assert(is = []);
bt_assert(0 !~ is);
bt_assert(1 ~ [1,2,3]);
bt_assert(5 ~ [1..20]);
bt_assert(2 ~ [ 1, 2, 3 ]);
bt_assert(5 ~ [ 4 .. 7 ]);
bt_assert(1 !~ [ 2, 3, 4 ]);
bt_assert(999 !~ [ 666, 333 ]);
bt_assert(1 !~ []);
bt_assert(1 !~ is);
is = [ 2, 3, 4, 7..11 ];
bt_assert(10 ~ is);
@ -170,6 +176,7 @@ int set is;
bt_assert([1,4..10,20] = [1,4..10,20]);
bt_assert(format([ 1, 2, 1, 1, 1, 3, 4, 1, 1, 1, 5 ]) = "[1, 1, 1, 1, 1, 1, 1, 2, 3, 4, 5]");
bt_assert(format([]) = "[]");
}
bt_test_suite(t_int_set, "Testing sets of integers");
@ -237,6 +244,9 @@ pair pp;
pair set ps;
{
pp = (1, 2);
ps = [];
bt_assert(pp !~ ps);
ps = [(1,(one+one)), (3,4)..(4,8), (5,*), (6,3..6)];
bt_assert(format(ps) = "[(1,2), (3,4)..(4,8), (5,0)..(5,65535), (6,3)..(6,6)]");
bt_assert(pp ~ ps);
@ -253,6 +263,7 @@ pair set ps;
bt_assert((6,6+one) !~ ps);
bt_assert(((one+6),2) !~ ps);
bt_assert((1,1) !~ ps);
bt_assert(pp !~ []);
ps = [(20..150, 200..300), (50100..50200, 1000..50000), (*, 5+5)];
bt_assert((100,200) ~ ps);
@ -304,6 +315,7 @@ quad qq;
qq = 1.2.3.4;
bt_assert(qq ~ [1.2.3.4, 5.6.7.8]);
bt_assert(qq !~ [1.2.1.1, 1.2.3.5]);
bt_assert(qq !~ []);
}
bt_test_suite(t_quad_set, "Testing sets of quads");
@ -384,6 +396,7 @@ ip set ips;
bt_assert(1.2.3.4 !~ [ 1.2.3.3, 1.2.3.5 ]);
bt_assert(1.2.3.4 ~ [ 1.2.3.3..1.2.3.5 ]);
bt_assert(1.2.3.4 !~ []);
}
bt_test_suite(t_ip_set, "Testing sets of ip address");
@ -473,13 +486,34 @@ function test_pxset(prefix set pxs)
bt_assert(1.0.0.0/8 ~ [ 1.0.0.0/8+ ]);
bt_assert(1.0.0.0/9 !~ [ 1.0.0.0/8- ]);
bt_assert(1.2.0.0/17 !~ [ 1.0.0.0/8{ 15 , 16 } ]);
bt_assert(net10 !~ []);
bt_assert([ 10.0.0.0/8{ 15 , 17 } ] = [ 10.0.0.0/8{ 15 , 17 } ]);
}
function test_empty_pxset(prefix set pxs)
int set s0;
prefix set s1;
{
s0 = [];
s1 = [];
bt_assert(pxs != s0);
bt_assert(pxs = s1);
#bt_assert(pxs = []);
}
function t_prefix_set()
prefix set pxs;
{
pxs = [];
bt_assert(format(pxs) = "[]");
#bt_assert(pxs = []);
bt_assert(1.2.0.0/16 !~ []);
bt_assert(1.2.0.0/16 !~ pxs);
test_empty_pxset([]);
test_empty_pxset(pxs);
pxs = [ 1.2.0.0/16, 1.4.0.0/16+, 44.66.88.64/30{24,28}, 12.34.56.0/24{8,16} ];
bt_assert(format(pxs) = "[1.2.0.0/16{0.1.0.0}, 1.4.0.0/16{0.1.255.255}, 12.34.0.0/16{1.255.0.0}, 44.66.88.64/28{0.0.1.240}]");
@ -564,6 +598,12 @@ bt_test_suite(t_prefix6, "Testing prefix IPv6");
function t_prefix6_set()
prefix set pxs;
{
pxs = [];
bt_assert(format(pxs) = "[]");
#bt_assert(pxs = []);
bt_assert(12::34/128 !~ []);
bt_assert(12::34/128 !~ pxs);
bt_assert(1180::/16 ~ [ 1100::/8{15, 17} ]);
bt_assert(12::34 = 12::34);
bt_assert(12::34 ~ [ 12::33..12::35 ]);
@ -681,6 +721,7 @@ int set set12;
bt_assert(3 ~ p2);
bt_assert(p2 ~ [2, 10..20]);
bt_assert(p2 ~ [4, 10..20]);
bt_assert(p2 !~ []);
p2 = prepend(p2, 5);
bt_assert(p2 !~ pm1);
@ -691,6 +732,8 @@ int set set12;
bt_assert(p2 ~ [= 5 [2, 4, 6] 3 [1..2] 1 =]);
bt_assert(p2 ~ [= 5 set35 3 set12 set12 =]);
bt_assert(p2 ~ mkpath(5, 4));
bt_assert(p2 ~ [= * [3] * =]);
bt_assert(p2 !~ [= * [] * =]);
bt_assert(p2.len = 5);
bt_assert(p2.first = 5);
@ -699,6 +742,10 @@ int set set12;
bt_assert(p2.len = 5);
bt_assert(delete(p2, 3) = prepend(prepend(prepend(prepend(+empty+, 1), 2), 4), 5));
bt_assert(filter(p2, [1..3]) = prepend(prepend(prepend(+empty+, 1), 2), 3));
bt_assert(delete(p2, []) = p2);
bt_assert(filter(p2, []) = +empty+);
bt_assert(delete(prepend(prepend(+empty+, 0), 1), []) = prepend(prepend(+empty+, 0), 1));
bt_assert(filter(prepend(prepend(+empty+, 0), 1), []) = +empty+);
p2 = prepend( + empty +, 5 );
p2 = prepend( p2, 4 );
@ -759,6 +806,7 @@ clist r;
bt_assert(l ~ [(2,2..3)]);
bt_assert(l ~ [(1,1..2)]);
bt_assert(l ~ [(1,1)..(1,2)]);
bt_assert(l !~ []);
l = add(l, (2,5));
l = add(l, (5,one));
@ -796,6 +844,9 @@ clist r;
bt_assert(l !~ [(*,(one+6))]);
bt_assert(l !~ [(*, (one+one+one))]);
bt_assert(delete(l, []) = l);
bt_assert(filter(l, []) = -empty-);
l = delete(l, [(*,(one+onef(3)))]);
l = delete(l, [(*,(4+one))]);
bt_assert(l = add(-empty-, (3,1)));
@ -913,11 +964,15 @@ eclist r;
bt_assert((ro, 10.20.30.40, 100) !~ el);
bt_assert(el !~ [(rt, 10, 35..40)]);
bt_assert(el !~ [(ro, 10, *)]);
bt_assert(el !~ []);
el = add(el, (rt, 10, 40));
el2 = filter(el, [(rt, 10, 20..40)] );
el2 = add(el2, (rt, 10, 50));
bt_assert(delete(el, []) = el);
bt_assert(filter(el, []) = --empty--);
# eclist A (1,30,40)
bt_assert(el = add(add(add(--empty--, (rt, 10, 1)), (rt, 10, 30)), (rt, 10, 40)));
bt_assert(format(el) = "(eclist (rt, 10, 1) (rt, 10, 30) (rt, 10, 40))");
@ -1035,6 +1090,9 @@ lclist r;
ll2 = add(ll2, (30, 30, 30));
ll2 = add(ll2, (40, 40, 40));
bt_assert(delete(ll, []) = ll);
bt_assert(filter(ll, []) = ---empty---);
# lclist A (10, 20, 30)
bt_assert(format(ll) = "(lclist (10, 10, 10) (20, 20, 20) (30, 30, 30))");
@ -1094,6 +1152,7 @@ lc set lls;
bt_assert(ll !~ [(5,10,15), (10,21,30)]);
bt_assert(ll !~ [(10,21..25,*)]);
bt_assert(ll !~ [(11, *, *)]);
bt_assert(ll !~ []);
lls = [(10, 10, 10), (20, 20, 15..25), (30, 30, *), (40, 35..45, *), (50, *, *), (55..65, *, *)];
bt_assert(format(lls) = "[(10, 10, 10), (20, 20, 15)..(20, 20, 25), (30, 30, 0)..(30, 30, 4294967295), (40, 35, 0)..(40, 45, 4294967295), (50, 0, 0)..(50, 4294967295, 4294967295), (55, 0, 0)..(65, 4294967295, 4294967295)]");
@ -1150,6 +1209,10 @@ bt_test_suite(t_rd, "Testing route distinguishers");
function t_rd_set()
rd set rds;
{
rds = [];
bt_assert(rds = []);
bt_assert(10:20 !~ rds);
rds = [10:20, 100000:100..100000:200];
bt_assert(format(rds) = "[10:20, 100000:100..100000:200]");
@ -1160,6 +1223,7 @@ rd set rds;
bt_assert(100000:128 ~ rds);
bt_assert(100000:200 ~ rds);
bt_assert(100010:150 !~ rds);
bt_assert(100010:150 !~ []);
}
bt_test_suite(t_rd_set, "Testing sets of route distinguishers");