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-rw-r--r--filter/config.Y15
-rw-r--r--filter/filter.c25
-rw-r--r--filter/filter.h6
3 files changed, 24 insertions, 22 deletions
diff --git a/filter/config.Y b/filter/config.Y
index b056297..953dfbc 100644
--- a/filter/config.Y
+++ b/filter/config.Y
@@ -106,7 +106,7 @@ type:
| PREFIX { $$ = T_PREFIX; }
| PAIR { $$ = T_PAIR; }
| STRING { $$ = T_STRING; }
- | BGP_PATH { $$ = T_PATH; }
+ | BGP_PATH { $$ = T_PATH_MASK; }
| type SET {
switch ($1) {
default:
@@ -313,8 +313,8 @@ bgp_one:
;
bgp_path:
- bgp_one { $$ = cfg_alloc(sizeof(struct f_path)); $$->next = NULL; $$->val = $1; }
- | bgp_one bgp_path { $$ = cfg_alloc(sizeof(struct f_path)); $$->next = $2; $$->val = $1; }
+ bgp_one { $$ = cfg_alloc(sizeof(struct f_path_mask)); $$->next = NULL; $$->val = $1; }
+ | bgp_one bgp_path { $$ = cfg_alloc(sizeof(struct f_path_mask)); $$->next = $2; $$->val = $1; }
;
constant:
@@ -327,7 +327,7 @@ constant:
| prefix_s {NEW_F_VAL; $$ = f_new_inst(); $$->code = 'C'; $$->a1.p = val; *val = $1; }
| '[' set_items ']' { DBG( "We've got a set here..." ); $$ = f_new_inst(); $$->code = 'c'; $$->aux = T_SET; $$->a2.p = build_tree($2); DBG( "ook\n" ); }
| ENUM { $$ = f_new_inst(); $$->code = 'c'; $$->aux = $1 >> 16; $$->a2.i = $1 & 0xffff; }
- | '/' bgp_path '/' { $$ = f_new_inst(); $$->code = 'c'; $$->aux = T_PATH; $$->a2.p = $2; }
+ | '/' bgp_path '/' { $$ = f_new_inst(); $$->code = 'c'; $$->aux = T_PATH_MASK; $$->a2.p = $2; }
;
/*
@@ -384,7 +384,7 @@ term:
case SYM_VARIABLE | T_PAIR:
case SYM_VARIABLE | T_PREFIX:
case SYM_VARIABLE | T_IP:
- case SYM_VARIABLE | T_PATH:
+ case SYM_VARIABLE | T_PATH_MASK:
$$->code = 'C';
$$->a1.p = $1->aux2;
break;
@@ -413,8 +413,9 @@ term:
| term '.' RESET { }
/* Paths */
- | term '.' APPEND '(' term ')' { }
-/* | term '.' LEN { } Hmm, this would colide with ip.len. What to do with that? */
+ | rtadot PATH '~' term { }
+ | rtadot PATH '.' APPEND '(' term ')' { }
+ | rtadot PATH '.' LEN { $$->code = P('P','l'); }
/* function_call is inlined here */
| SYM '(' var_list ')' {
diff --git a/filter/filter.c b/filter/filter.c
index 9788edb..2da2a28 100644
--- a/filter/filter.c
+++ b/filter/filter.c
@@ -133,7 +133,7 @@ val_print(struct f_val v)
case T_PAIR: PRINTF( "(%d,%d)", v.val.i >> 16, v.val.i & 0xffff ); break;
case T_SET: tree_print( v.val.t ); PRINTF( "\n" ); break;
case T_ENUM: PRINTF( "(enum %x)%d", v.type, v.val.i ); break;
- case T_PATH: debug( "(path " ); { struct f_path *p = v.val.s; while (p) { debug("%d ", p->val); p=p->next; } debug(")" ); } break;
+ case T_PATH_MASK: debug( "(path " ); { struct f_path_mask *p = v.val.s; while (p) { debug("%d ", p->val); p=p->next; } debug(")" ); } break;
default: PRINTF( "[unknown type %x]", v.type );
#undef PRINTF
}
@@ -249,7 +249,7 @@ interpret(struct f_inst *what)
case T_IP:
case T_PREFIX:
case T_PAIR:
- case T_PATH:
+ case T_PATH_MASK:
if (sym->class != (SYM_VARIABLE | v2.type))
runtime( "Variable of bad type" );
* (struct f_val *) sym->aux2 = v2;
@@ -643,13 +643,14 @@ path_format(u8 *p, int len)
#define PM_END -1
#define PM_ASTERIX -2
-#define MASK_PLUS do { if (*++mask == PM_END) return next == q; \
- asterix = (*mask == PM_ASTERIX); \
+#define MASK_PLUS do { mask = mask->next; if (mask->val == PM_END) return next == q; \
+ asterix = (mask->val == PM_ASTERIX); \
printf( "Asterix now %d\n", asterix ); \
- if (asterix) { if (*++mask == PM_END) { printf( "Quick exit\n" ); return 1; } } \
+ if (asterix) { mask = mask->next; if (mask->val == PM_END) { printf( "Quick exit\n" ); return 1; } } \
} while(0)
+
int
-path_match(u8 *p, int len, s32 *mask)
+path_match(u8 *p, int len, struct f_path_mask *mask)
{
int i;
int asterix = 0;
@@ -666,11 +667,11 @@ path_match(u8 *p, int len, s32 *mask)
retry:
p = p_save;
for (i=0; i<len; i++) {
- if (asterix && (get_u16(p) == *mask)) {
+ if (asterix && (get_u16(p) == mask->val)) {
MASK_PLUS;
goto retry;
}
- if (!asterix && (get_u16(p) == *mask)) {
+ if (!asterix && (get_u16(p) == mask->val)) {
p = next;
MASK_PLUS;
goto okay;
@@ -687,10 +688,10 @@ path_match(u8 *p, int len, s32 *mask)
len = *p++;
for (i=0; i<len; i++) {
next = p+2;
- if (asterix && (get_u16(p) == *mask))
+ if (asterix && (get_u16(p) == mask->val))
MASK_PLUS;
else if (!asterix) {
- if (get_u16(p) != *mask)
+ if (get_u16(p) != mask->val)
return 0;
MASK_PLUS;
}
@@ -767,7 +768,7 @@ self_test(void)
DBG( "%s\n", path_format(path1, sizeof(path1)) );
DBG( "%s\n", path_format(path2, sizeof(path2)) );
DBG( "5, 6 = %d, %d\n", path_getlen(path1, sizeof(path1)), path_getlen(path2, sizeof(path2)) );
- DBG( "%d\n", path_match(path1, sizeof(path1), match));
- DBG( "%d\n", path_match(path2, sizeof(path2), match));
+// DBG( "%d\n", path_match(path1, sizeof(path1), match));
+// DBG( "%d\n", path_match(path2, sizeof(path2), match));
// die( "okay" );
}
diff --git a/filter/filter.h b/filter/filter.h
index ecfd88d..ab33739 100644
--- a/filter/filter.h
+++ b/filter/filter.h
@@ -50,8 +50,8 @@ struct f_val {
} val;
};
-struct f_path {
- struct f_path *next;
+struct f_path_mask {
+ struct f_path_mask *next;
int val;
};
@@ -115,7 +115,7 @@ void val_print(struct f_val v);
#define T_IP 0x20
#define T_PREFIX 0x21
#define T_STRING 0x22
-#define T_PATH 0x23 /* BGP path */
+#define T_PATH_MASK 0x23 /* mask for BGP path */
#define T_RETURN 0x40
#define T_SET 0x80
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 03:56:43 +0100