Renamed f_path to f_path_mask -- which is what it really is. Use

linklist instead of array of signed integers for path mask.

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