From 0dc4431cde1eeb06d9b4d7dbf18242919ce2811a Mon Sep 17 00:00:00 2001
From: Pavel Machek <pavel@ucw.cz>
Date: Tue, 30 May 2000 11:07:22 +0000
Subject: [PATCH] Access to all attributes we should be able to access seems to
 work.

---
 filter/config.Y | 25 ++++++++++++++++++-------
 filter/filter.c | 34 +++++++++++++++++++++++++++++++++-
 2 files changed, 51 insertions(+), 8 deletions(-)

diff --git a/filter/config.Y b/filter/config.Y
index 37c0f3f3..9d5dc43a 100644
--- a/filter/config.Y
+++ b/filter/config.Y
@@ -20,7 +20,7 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
 	INT, BOOL, IP, PREFIX, PAIR, SET, STRING, BGPMASK, BGPPATH, CLIST,
 	IF, THEN, ELSE, CASE,
 	TRUE, FALSE,
-	FROM, GW, NET, MASK, SOURCE, SCOPE, CAST, DEST,
+	FROM, GW, NET, MASK, SOURCE, SCOPE, CAST, DEST, PREFERENCE,
 	LEN,
 	DEFINED,
 	ADD, DELETE, CONTAINS, RESET,
@@ -325,13 +325,12 @@ function_call:
  ;
 
 static_attr:
-/* FIXME (maybe?) rta.from read/write */
-   FROM    { $$ = f_new_inst(); $$->aux = T_IP;         $$->a2.i = OFFSETOF(struct rta, from); }
+   FROM    { $$ = f_new_inst(); $$->aux = T_IP;         $$->a2.i = OFFSETOF(struct rta, from);   $$->a1.i = 1; }
 
- | GW      { $$ = f_new_inst(); $$->aux = T_IP;         $$->a2.i = OFFSETOF(struct rta, gw); }    /* FIXME: want it read/write */
+ | GW      { $$ = f_new_inst(); $$->aux = T_IP;         $$->a2.i = OFFSETOF(struct rta, gw);     $$->a1.i = 1; }
  | NET     { $$ = f_new_inst(); $$->aux = T_PREFIX;     $$->a2.i = 0x12345678; /* This is actually ok - T_PREFIX is special-cased. */ }
  | SOURCE  { $$ = f_new_inst(); $$->aux = T_ENUM_RTS;   $$->a2.i = OFFSETOF(struct rta, source); }
- | SCOPE   { $$ = f_new_inst(); $$->aux = T_ENUM_SCOPE; $$->a2.i = OFFSETOF(struct rta, scope); } /* FIXME: want it read/write */
+ | SCOPE   { $$ = f_new_inst(); $$->aux = T_ENUM_SCOPE; $$->a2.i = OFFSETOF(struct rta, scope);  $$->a1.i = 1; }
  | CAST    { $$ = f_new_inst(); $$->aux = T_ENUM_RTC;   $$->a2.i = OFFSETOF(struct rta, cast); }
  | DEST    { $$ = f_new_inst(); $$->aux = T_ENUM_RTD;   $$->a2.i = OFFSETOF(struct rta, dest); }
  ;
@@ -380,7 +379,7 @@ term:
      }
    }
 
-/* FIXME rte.Preference - read/write */
+ | PREFERENCE { $$ = f_new_inst(); $$->code = 'P'; }
 
  | rtadot static_attr { $$ = $2; $$->code = 'a'; }
 
@@ -507,9 +506,21 @@ cmd:
    }
  | rtadot dynamic_attr '=' term ';' {
      $$ = $2;
-     $$->code  = P('e','S');
+     $$->code = P('e','S');
      $$->a1.p = $4;
    }
+ | rtadot static_attr '=' term ';' {
+     $$ = $2;
+     if (!$$->a1.i)
+       cf_error( "This static attribute is read-only.");
+     $$->code = P('a','S');
+     $$->a1.p = $4;
+   }
+ | PREFERENCE '=' term ';' {
+     $$ = f_new_inst();
+     $$->code = P('P','S');
+     $$->a1.p = $3;
+   } 
  | UNSET '(' rtadot dynamic_attr ')' ';' {
      $$ = $4;
      $$->aux = EAF_TYPE_UNDEF | EAF_TEMP;
diff --git a/filter/filter.c b/filter/filter.c
index e69e9e10..59b96588 100644
--- a/filter/filter.c
+++ b/filter/filter.c
@@ -412,6 +412,25 @@ interpret(struct f_inst *what)
       }
     }
     break;
+  case P('a','S'):
+    ONEARG;
+    if (what->aux != v1.type)
+      runtime( "Attempt to set static attribute to invalid type" );
+    rta_cow();
+    {
+      struct rta *rta = (*f_rte)->attrs;
+      switch (what->aux) {
+      case T_ENUM:
+	* ((char *) rta + what->a2.i) = v1.val.i;
+	break;
+      case T_IP:
+	* (ip_addr *) ((char *) rta + what->a2.i) = v1.val.px.ip;
+	break;
+      default:
+	bug( "Unknown type in set of static attribute" );
+      }
+    }
+    break;
   case P('e','a'):	/* Access to extended attributes */
     {
       eattr *e = NULL;
@@ -498,7 +517,17 @@ interpret(struct f_inst *what)
       }
     }
     break;
-
+  case 'P':
+    res.type = T_INT;
+    res.val.i = (*f_rte)->pref;
+    break;
+  case P('P','S'):
+    ONEARG;
+    if (v1.type != T_INT)
+      runtime( "Can not set preference to non-integer" );
+    *f_rte = rte_cow(*f_rte);
+    (*f_rte)->pref = v1.val.i;
+    break;
   case 'L':	/* Get length of */
     ONEARG;
     res.type = T_INT;
@@ -661,8 +690,11 @@ i_same(struct f_inst *f1, struct f_inst *f2)
   case '?': TWOARGS; break;
   case '0': case 'E': break;
   case P('p',','): ONEARG; A2_SAME; break;
+  case 'P':
   case 'a': A2_SAME; break;
   case P('e','a'): A2_SAME; break;
+  case P('P','S'):
+  case P('a','S'):
   case P('e','S'): ONEARG; A2_SAME; break;
 
   case 'r': ONEARG; break;