diff --git a/filter/config.Y b/filter/config.Y
index 1e3a1953..00aeefc1 100644
--- a/filter/config.Y
+++ b/filter/config.Y
@@ -227,8 +227,22 @@ set_atom:
  ; 
 
 set_item:
-   set_atom { $$ = f_new_tree(); $$->from = $$->to = $1 }
- | set_atom '.' '.' set_atom { $$ = f_new_tree(); $$->from = $1; $$->to = $4; }
+   set_atom { 
+	$$ = f_new_tree(); 
+	$$->from = $1; 
+	if ($1.type != T_PREFIX)
+		$$->to = $1;
+	else {
+		$$->to = $1;
+		$$->to.val.px.ip = ipa_or( $$->to.val.px.ip, ipa_not( ipa_mkmask( $$->to.val.px.len ) ));
+	}
+   }
+ | set_atom '.' '.' set_atom { 
+	$$ = f_new_tree(); 
+	$$->from = $1; 
+	$$->to = $4; 
+	if (($1.type == T_PREFIX) || ($4.type == T_PREFIX)) cf_error( "You can not use prefixes for range" ); 
+   }
  ;
 
 set_items:
@@ -307,6 +321,7 @@ term:
  | term '>' term     { $$ = f_new_inst(); $$->code = '<';        $$->a1.p = $3; $$->a2.p = $1; }
  | term GEQ term { $$ = f_new_inst(); $$->code = P('<','=');     $$->a1.p = $3; $$->a2.p = $1; }
  | term '~' term     { $$ = f_new_inst(); $$->code = '~';        $$->a1.p = $1; $$->a2.p = $3; }
+ | '!' term { $$ = f_new_inst(); $$->code = '!'; $$->a1.p = $2; }
  | DEFINED '(' term ')' { $$ = f_new_inst(); $$->code = P('d','e');  $$->a1.p = $3; }
 
  | constant { $$ = $1; }
@@ -336,7 +351,27 @@ term:
  | term '.' IP { $$ = 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; $$->aux = T_INT; }
  | term '.' MASK '(' term ')' { $$ = f_new_inst(); $$->code = P('i','M'); $$->a1.p = $1; $$->a2.p = $5; }
- | function_call { $$ = $1; /* 1 shift/reduce conflict */ }
+/* function_call is inlined here */
+ | SYM '(' var_list ')' {
+     struct symbol *sym;
+     struct f_inst *inst = $3;
+     if ($1->class != SYM_FUNCTION)
+       cf_error("You can not call something which is not function. Really.");
+     DBG("You are calling function %s\n", $1->name);
+     $$ = f_new_inst();
+     $$->code = P('c','a');
+     $$->a1.p = inst;
+     $$->a2.p = $1->aux2;
+     sym = (void *) $1->aux;
+     while (sym || inst) {
+       if (!sym || !inst)
+	 cf_error("wrong number of arguments for function %s.", $1->name);
+       DBG( "You should pass parameter called %s\n", sym->name);
+       inst->a1.p = sym;
+       sym = (void *) sym->aux;
+       inst = inst->next;
+     }
+   }
  ;
 
 break_command:
@@ -353,12 +388,14 @@ print_one:
  ;
 
 print_list: /* EMPTY */ { $$ = NULL; }
- | print_one print_list {
+ | print_one { $$ = $1; }
+ | print_one ',' print_list {
      if ($1) {
-       $1->next = $2;
+       $1->next = $3;
        $$ = $1;
-     } else $$ = $2;
+     } else $$ = $3;
    }
+ 
  ;
 
 var_listn: term { 
diff --git a/filter/filter.c b/filter/filter.c
index f0e9cd8a..8fd0f78d 100644
--- a/filter/filter.c
+++ b/filter/filter.c
@@ -216,6 +216,14 @@ interpret(struct f_inst *what)
   case '<': COMPARE(i==-1);
   case P('<','='): COMPARE(i!=1);
 
+  case '!':
+    ONEARG;
+    if (v1.type != T_BOOL)
+      runtime( "not applied to non-boolean" );
+    res = v1;
+    res.val.i = !res.val.i;
+    break;
+
   case '~':
     TWOARGS;
     res.type = T_BOOL;
@@ -466,6 +474,7 @@ i_same(struct f_inst *f1, struct f_inst *f2)
   case '<':
   case P('<','='): TWOARGS; break;
 
+  case '!': ONEARG; break;
   case '~': TWOARGS; break;
   case P('d','e'): ONEARG; break;
 
diff --git a/filter/test.conf b/filter/test.conf
index 22dba293..1677cd2f 100644
--- a/filter/test.conf
+++ b/filter/test.conf
@@ -13,7 +13,7 @@ int local1;
 int local2;
 int i;
 {
-	printn "Function callme called arguments " arg1 " and " arg2 ":";
+	printn "Function callme called arguments ", arg1, " and ", arg2, ":" ;
 	i = arg2;
 
 	case arg1 {
@@ -38,23 +38,29 @@ ip p;
 	i = 4; 
 	i = 1230 + i; 
 	i = ( i + 0 );
-	print "  arithmetics: 1234 = " i;
+	print "  arithmetics: 1234 = ", i;
 	printn "  if statements ";
-	if i = 4 then { print "*** FAIL: if 0"; quitbird; } else printn ".";
+	print "what happens here?";
+	printn ".";
+	if (i = 4) then { print "*** FAIL: if 0"; quitbird; } else printn ".";
+#	if !(i = 3) then { print "*** FAIL: if 0"; quitbird; } else printn ".";
 	if 1234 = i then printn "."; else { print "*** FAIL: if 1 else"; }
-	if 1 <= 1 then printn "."; else { print "*** FAIL: test 3"; }
+#	if 1 <= 1 then printn "."; else { print "*** FAIL: test 3"; }
 	if 1234 < 1234 then { print "*** FAIL: test 4"; quitbird; } else print "ok";
-	print "  data types; must be true: " 1.2.3.4 = 1.2.3.4 "," 1 ~ [1,2,3] "," 5 ~ [1..20] "," 2 ~ [ 1, 2, 3 ] "," 5 ~ [ 4 .. 7 ] "," 1.2.3.4 ~ [ 1.2.3.3..1.2.3.5 ] "," 1.2.3.4 ~ 1.0.0.0/8 "," 1.0.0.0/8 ~ 1.0.0.0/8 "," 1.0.0.0/8 ~ [ 1.0.0.0/8+ ] "," 1.2.0.0/16 ~ [ 1.0.0.0/8{ 15 , 16 } ] "," defined(1) "," defined(1.2.3.4) "," 1 != 2 "," 1 <= 2;
-	print "  data types: must be false: " 1 ~ [ 2, 3, 4 ] "," 5 ~ [ 2, 3, 4, 7..11 ] "," 1.2.3.4 ~ [ 1.2.3.3, 1.2.3.5 ] "," (1,2) > (2,2) "," (1,1) > (1,1) "," 1.0.0.0/8 ~ [ 1.0.0.0/8- ] "," 1.2.0.0/17 ~ [ 1.0.0.0/8{ 15 , 16 } ];
+	print "  must be true: ", 1.2.0.0/16 ~ [ 1.0.0.0/8{ 15 , 17 } ];
+	print "  data types; must be true: ", 1.2.3.4 = 1.2.3.4, ",", 1 ~ [1,2,3], ",", 5 ~ [1..20], ",", 2 ~ [ 1, 2, 3 ], ",", 5 ~ [ 4 .. 7 ], ",", 1.2.3.4 ~ [ 1.2.3.3..1.2.3.5 ], ",", 1.2.3.4 ~ 1.0.0.0/8, ",", 1.0.0.0/8 ~ 1.0.0.0/8, ",", 1.0.0.0/8 ~ [ 1.0.0.0/8+ ];
+
+#	print "  must be true: ", defined(1), ",", defined(1.2.3.4), ",", 1 != 2, ",", 1 <= 2;
+	print "  data types: must be false: ", 1 ~ [ 2, 3, 4 ], ",", 5 ~ [ 2, 3, 4, 7..11 ], ",", 1.2.3.4 ~ [ 1.2.3.3, 1.2.3.5 ], ",", (1,2) > (2,2), ",", (1,1) > (1,1), ",", 1.0.0.0/8 ~ [ 1.0.0.0/8- ], ",", 1.2.0.0/17 ~ [ 1.0.0.0/8{ 15 , 16 } ];
 
 	px = 1.2.0.0/18;
-	print "Testing prefixes: 1.2.0.0/18 = " px;
+	print "Testing prefixes: 1.2.0.0/18 = ", px;
 	p = 127.1.2.3;
-	print "Testing mask : 127.0.0.0 = " p.mask(8);
-	print "Testing pairs: (1,2) = " (1,2);
-	print "Testing enums: " RTS_DUMMY " " RTS_STATIC;
+	print "Testing mask : 127.0.0.0 = ", p.mask(8);
+	print "Testing pairs: (1,2) = ", (1,2);
+	print "Testing enums: ", RTS_DUMMY, " ", RTS_STATIC;
 
-	print "What will this do? " [ 1, 2, 1, 1, 1, 3, 4, 1, 1, 1, 5 ];
+	print "What will this do? ", [ 1, 2, 1, 1, 1, 3, 4, 1, 1, 1, 5 ];
 
 	print "Testing functions...";
 #	callme ( 1, 2 );
@@ -65,7 +71,7 @@ ip p;
 	callme ( 7, 2 );
 
 	i = fifteen();
-	print "Testing function calls: 15 = " i;
+	print "Testing function calls: 15 = ", i;
 
 	print "done";
 	quitbird;
@@ -75,8 +81,8 @@ ip p;
 filter testf 
 int j; 
 { 
-	print "Heya, filtering route to " net.ip " prefixlen " net.len " source " source;
-	print "This route was from " from;
+	print "Heya, filtering route to ", net.ip, " prefixlen ", net.len, " source ", source;
+	print "This route was from ", from;
 	j = 7;
 	j = 17;
 	if rip_metric > 15 then {