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Path_getlen moved to nest and length was made callable from filters.

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This commit is contained in:
Pavel Machek
2000-04-17 11:06:39 +00:00
parent ecd25633bd
commit 684c6f5a0e
5 changed files with 36 additions and 21 deletions
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2
filter/config.Y
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@@ -407,7 +407,7 @@ term:
| rtadot dynamic_attr { $$ = $2; $$->code = P('e','a'); }
| term '.' IP { $$ = f_new_inst(); $$->code = P('c','p'); $$->a1.p = $1; $$->aux = T_IP; }
| term '.' LEN { $$ = f_new_inst(); $$->code = P('c','p'); $$->a1.p = $1; $$->aux = T_INT; }
| term '.' LEN { $$ = f_new_inst(); $$->code = 'L'; $$->a1.p = $1; }
| term '.' MASK '(' term ')' { $$ = f_new_inst(); $$->code = P('i','M'); $$->a1.p = $1; $$->a2.p = $5; }
/* Communities */

28
filter/filter.c
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@@ -404,13 +404,22 @@ interpret(struct f_inst *what)
}
break;
case 'L': /* Get length of */
ONEARG;
res.type = T_INT;
switch(v1.type) {
case T_PREFIX: res.val.i = v1.val.px.len; break;
case T_PATH: res.val.i = as_path_getlen(v1.val.ad); break;
default: bug( "Length of what?" );
}
break;
case P('c','p'): /* Convert prefix to ... */
ONEARG;
if (v1.type != T_PREFIX)
runtime( "Can not convert non-prefix this way" );
res.type = what->aux;
switch(res.type) {
case T_INT: res.val.i = v1.val.px.len; break;
/* case T_INT: res.val.i = v1.val.px.len; break; Not needed any more */
case T_IP: res.val.px.ip = v1.val.px.ip; break;
default: bug( "Unknown prefix to conversion" );
}
@@ -536,7 +545,7 @@ i_same(struct f_inst *f1, struct f_inst *f2)
if (val_compare(* (struct f_val *) f1->a1.p, * (struct f_val *) f2->a2.p))
return 0;
break;
case 'p': ONEARG; break;
case 'p': case 'L': ONEARG; break;
case '?': TWOARGS; break;
case '0': case 'E': break;
case P('p',','): ONEARG; A2_SAME; break;
@@ -612,21 +621,6 @@ filter_same(struct filter *new, struct filter *old)
* Or maybe both versions are usefull?
*/
int
path_getlen(u8 *p, int len)
{
int res = 0;
u8 *q = p+len;
while (p<q) {
switch (*p++) {
case 1: len = *p++; res++; p += 2*len; break;
case 2: len = *p++; res+=len; p += 2*len; break;
default: bug("This should not be in path");
}
}
return res;
}
#define MASK_PLUS do { mask = mask->next; if (!mask) return next == q; \
asterix = (mask->val == PM_ANY); \
if (asterix) { mask = mask->next; if (!mask) { return 1; } } \

2
filter/test.conf
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@@ -41,9 +41,11 @@ bgppath p2;
p2 = prepend( p2, 4 );
print "Testing paths: ", p2;
print "Should be true: ", p2 ~ p;
print "4 = ", p2.len;
p2 = prepend( p2, 5 );
print "Should be false: ", p2 ~ p;
print "Should be true: ", p2 ~ / * 4 3 2 1 /, p2, / * 4 3 2 1 /;
print "5 = ", p2.len;
}
function startup()

18
nest/a-path.c
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@@ -81,3 +81,21 @@ as_path_format(struct adata *path, byte *buf, unsigned int size)
}
*buf = 0;
}
int
as_path_getlen(struct adata *path)
{
int res = 0;
u8 *p = path->data;
u8 *q = p+path->length;
int len;
while (p<q) {
switch (*p++) {
case 1: len = *p++; res++; p += 2*len; break;
case 2: len = *p++; res+=len; p += 2*len; break;
default: bug("This should not be in path");
}
}
return res;
}

7
nest/attrs.h
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@@ -11,12 +11,13 @@
/* a-path.c */
struct adata *as_path_prepend(struct linpool *pool, struct adata *olda, int as);
void as_path_format(struct adata *path, byte *buf, unsigned int size);
#define AS_PATH_SET 1 /* Types of path segments */
#define AS_PATH_SEQUENCE 2
struct adata *as_path_prepend(struct linpool *pool, struct adata *olda, int as);
void as_path_format(struct adata *path, byte *buf, unsigned int size);
int as_path_getlen(struct adata *path);
/* a-set.c */
void int_set_format(struct adata *set, byte *buf, unsigned int size);