From 26c09e1d25abff7fb88959dc6fbaa7ae5eb295ad Mon Sep 17 00:00:00 2001
From: Pavel Machek <pavel@ucw.cz>
Date: Tue, 30 May 2000 10:42:39 +0000
Subject: Added read-only access to all required fields in rta.

---
 filter/config.Y | 22 ++++++++--------------
 filter/filter.c | 20 +++++++++++++-------
 filter/filter.h |  3 +++
 3 files changed, 24 insertions(+), 21 deletions(-)

(limited to 'filter')

diff --git a/filter/config.Y b/filter/config.Y
index f72dc83..37c0f3f 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,
+	FROM, GW, NET, MASK, SOURCE, SCOPE, CAST, DEST,
 	LEN,
 	DEFINED,
 	ADD, DELETE, CONTAINS, RESET,
@@ -301,9 +301,6 @@ CF_ADDTO(dynamic_attr, INVALID_TOKEN { $$ = NULL; })
 rtadot: /* EMPTY, we are not permitted RTA. prefix */
  ;
 
-
-
-
 function_call:
    SYM '(' var_list ')' {
      struct symbol *sym;
@@ -329,19 +326,16 @@ 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); }
 
-/* FIXME Gw read/write */
- | GW      { $$ = f_new_inst(); $$->aux = T_IP;       $$->a2.i = OFFSETOF(struct rta, gw); }
- | NET     { $$ = 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; $$->a2.i = OFFSETOF(struct rta, source); }
+ | GW      { $$ = f_new_inst(); $$->aux = T_IP;         $$->a2.i = OFFSETOF(struct rta, gw); }    /* FIXME: want it read/write */
+ | 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; $$->a2.i = OFFSETOF(struct rta, scope); } /* FIXME: want it read/write */
+ | CAST    { $$ = 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); }
  ;
 
-/* FIXME rta.Scope - read/write */
-/* FIXME rta.Cast - read */
-/* FIXME rta.Dest - read */
-
-
 term:
    '(' term ')'      { $$ = $2; }
  | term '+' term     { $$ = f_new_inst(); $$->code = '+';        $$->a1.p = $1; $$->a2.p = $3; }
diff --git a/filter/filter.c b/filter/filter.c
index 246fbf6..e69e9e1 100644
--- a/filter/filter.c
+++ b/filter/filter.c
@@ -200,6 +200,18 @@ static struct ea_list **f_tmp_attrs;
 static int f_flags;
 static rta *f_rta_copy;
 
+void
+rta_cow(void)
+{
+  if (!f_rta_copy) {
+    f_rta_copy = lp_alloc(f_pool, sizeof(rta));
+    memcpy(f_rta_copy, (*f_rte)->attrs, sizeof(rta));
+    f_rta_copy->aflags = 0;
+    *f_rte = rte_cow(*f_rte);
+    (*f_rte)->attrs = f_rta_copy;
+  }
+}
+
 #define runtime(x) do { \
     log( L_ERR "filters, line %d: %s", what->lineno, x); \
     res.type = T_RETURN; \
@@ -477,13 +489,7 @@ interpret(struct f_inst *what)
       }
 
       if (!(what->aux & EAF_TEMP) && (!(f_flags & FF_FORCE_TMPATTR))) {
-	if (!f_rta_copy) {
-	  f_rta_copy = lp_alloc(f_pool, sizeof(rta));
-	  memcpy(f_rta_copy, (*f_rte)->attrs, sizeof(rta));
-	  f_rta_copy->aflags = 0;
-	  *f_rte = rte_cow(*f_rte);
-	  (*f_rte)->attrs = f_rta_copy;
-	}
+	rta_cow();
 	l->next = f_rta_copy->eattrs;
 	f_rta_copy->eattrs = l;
       } else {
diff --git a/filter/filter.h b/filter/filter.h
index 1039c6f..04a2623 100644
--- a/filter/filter.h
+++ b/filter/filter.h
@@ -109,6 +109,9 @@ void val_print(struct f_val v);
 
 #define T_ENUM_RTS 0x30
 #define T_ENUM_BGP_ORIGIN 0x31
+#define T_ENUM_SCOPE 0x32
+#define T_ENUM_RTC 0x33
+#define T_ENUM_RTD 0x34
 /* new enums go here */
 #define T_ENUM_EMPTY 0x3f	/* Special hack for atomic_aggr */
 
-- 
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