BGP Extended communities.

4 files changed, 482 insertions, 71 deletions

diff --git a/filter/config.Y b/filter/config.Y
index 80e7428..3c5f18b 100644
--- a/filter/config.Y
+++ b/filter/config.Y
@@ -75,13 +75,185 @@ f_new_pair_set(int fa, int ta, int fb, int tb)
   return lst;
 }
 
+#define EC_ALL 0xFFFFFFFF
+
+static struct f_tree *
+f_new_ec_item(u32 kind, u32 ipv4_used, u32 key, u32 vf, u32 vt)
+{
+  u64 fm, to;
+
+  if (ipv4_used || (key >= 0x10000)) {
+    check_u16(vf);
+    if (vt == EC_ALL)
+      vt = 0xFFFF;
+    else
+      check_u16(vt);
+  }
+
+  if (kind == EC_GENERIC) {
+    fm = ec_generic(key, vf);
+    to = ec_generic(key, vt);
+  }
+  else if (ipv4_used) {
+    fm = ec_ip4(kind, key, vf);
+    to = ec_ip4(kind, key, vt);
+  }
+  else if (key < 0x10000) {
+    fm = ec_as2(kind, key, vf);
+    to = ec_as2(kind, key, vt);
+  }
+  else {
+    fm = ec_as4(kind, key, vf);
+    to = ec_as4(kind, key, vt);
+  }
+
+  struct f_tree *t = f_new_tree();
+  t->right = t;
+  t->from.type = t->to.type = T_EC;
+  t->from.val.ec = fm;
+  t->to.val.ec = to;
+  return t;
+}
+
+static inline struct f_inst *
+f_generate_empty(struct f_inst *dyn)
+{ 
+  struct f_inst *e = f_new_inst();
+  e->code = 'E';
+
+  switch (dyn->aux & EAF_TYPE_MASK) {
+    case EAF_TYPE_AS_PATH:
+      e->aux = T_PATH;
+      break;
+    case EAF_TYPE_INT_SET:
+      e->aux = T_CLIST;
+      break;
+    case EAF_TYPE_EC_SET:
+      e->aux = T_ECLIST;
+      break;
+    default:
+      cf_error("Can't empty that attribute");
+  }
+
+  dyn->code = P('e','S');
+  dyn->a1.p = e;
+  return dyn;
+}
+
+
+static inline struct f_inst *
+f_generate_dpair(struct f_inst *t1, struct f_inst *t2)
+{
+  struct f_inst *rv;
+
+  if ((t1->code == 'c') && (t2->code == 'c')) {
+    if ((t1->aux != T_INT) || (t2->aux != T_INT))
+      cf_error( "Can't operate with value of non-integer type in pair constructor");
+
+    check_u16(t1->a2.i);
+    check_u16(t2->a2.i);
+
+    rv = f_new_inst();
+    rv->code = 'c';
+    rv->aux = T_PAIR;
+    rv->a2.i = pair(t1->a2.i, t2->a2.i);
+  }
+  else {
+    rv = f_new_inst();
+    rv->code = P('m', 'p');
+    rv->a1.p = t1;
+    rv->a2.p = t2;
+  }
+
+  return rv;
+}
+
+static inline struct f_inst *
+f_generate_ec(u16 kind, struct f_inst *tk, struct f_inst *tv)
+{
+  struct f_inst *rv;
+  int c1 = 0, c2 = 0, ipv4_used = 0;
+  u32 key = 0, val2 = 0;
+
+  if (tk->code == 'c') {
+    c1 = 1;
+
+    if (tk->aux == T_INT) {
+      ipv4_used = 0; key = tk->a2.i;
+    }
+    else if (tk->aux == T_QUAD) {
+      ipv4_used = 1; key = tk->a2.i;
+    }
+    else
+      cf_error("Can't operate with key of non-integer/IPv4 type in EC constructor");
+  }
+
+#ifndef IPV6
+  /* IP->Quad implicit conversion */
+  else if (tk->code == 'C') {
+    c1 = 1;
+    struct f_val *val = tk->a1.p;
+    if (val->type == T_IP) {
+      ipv4_used = 1; key = ipa_to_u32(val->val.px.ip);
+    }
+    else
+      cf_error("Can't operate with key of non-integer/IPv4 type in EC constructor");
+  }
+#endif
+
+  if (tv->code == 'c') {
+    if (tv->aux != T_INT)
+      cf_error("Can't operate with value of non-integer type in EC constructor");
+    c2 = 1;
+    val2 = tv->a2.i;
+  }
+
+  if (c1 && c2) {
+    u64 ec;
+  
+    if (kind == EC_GENERIC) {
+      ec = ec_generic(key, val2);
+    }
+    else if (ipv4_used) {
+      check_u16(val2);
+      ec = ec_ip4(kind, key, val2);
+    }
+    else if (key < 0x10000) {
+      ec = ec_as2(kind, key, val2);
+    }
+    else {
+      check_u16(val2);
+      ec = ec_as4(kind, key, val2);
+    }
+
+    NEW_F_VAL;
+    rv = f_new_inst();
+    rv->code = 'C';
+    rv->a1.p = val;    
+    val->type = T_EC;
+    val->val.ec = ec;
+  }
+  else {
+    rv = f_new_inst();
+    rv->code = P('m','c');
+    rv->aux = kind;
+    rv->a1.p = tk;
+    rv->a2.p = tv;
+  }
+
+  return rv;
+};
+
+
+
 CF_DECLS
 
 CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
 	ACCEPT, REJECT, ERROR, QUITBIRD,
-	INT, BOOL, IP, PREFIX, PAIR, QUAD, SET, STRING, BGPMASK, BGPPATH, CLIST,
+	INT, BOOL, IP, PREFIX, PAIR, QUAD, EC,
+	SET, STRING, BGPMASK, BGPPATH, CLIST, ECLIST,
 	IF, THEN, ELSE, CASE,
-	TRUE, FALSE,
+	TRUE, FALSE, RT, RO, UNKNOWN, GENERIC,
 	FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, CAST, DEST, PREFERENCE,
 	LEN,
 	DEFINED,
@@ -93,11 +265,11 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
 %nonassoc THEN
 %nonassoc ELSE
 
-%type <x> term block cmds cmds_int cmd function_body constant print_one print_list var_list var_listn dynamic_attr static_attr function_call symbol dpair bgp_path_expr
+%type <x> term block cmds cmds_int cmd function_body constant constructor print_one print_list var_list var_listn dynamic_attr static_attr function_call symbol bgp_path_expr
 %type <f> filter filter_body where_filter
-%type <i> type break_command pair_expr
-%type <i32> pair_atom
-%type <e> pair_item set_item switch_item set_items switch_items switch_body
+%type <i> type break_command pair_expr ec_kind
+%type <i32> pair_atom ec_expr
+%type <e> pair_item ec_item set_item switch_item set_items switch_items switch_body
 %type <trie> fprefix_set
 %type <v> set_atom switch_atom fprefix fprefix_s fipa
 %type <s> decls declsn one_decl function_params 
@@ -128,15 +300,18 @@ type:
  | PREFIX { $$ = T_PREFIX; }
  | PAIR { $$ = T_PAIR; }
  | QUAD { $$ = T_QUAD; }
+ | EC { $$ = T_EC; }
  | STRING { $$ = T_STRING; }
  | BGPMASK { $$ = T_PATH_MASK; }
  | BGPPATH { $$ = T_PATH; }
  | CLIST { $$ = T_CLIST; }
+ | ECLIST { $$ = T_ECLIST; }
  | type SET { 
 	switch ($1) {
 	  case T_INT:
 	  case T_PAIR:
 	  case T_QUAD:
+	  case T_EC:
 	  case T_IP:
 	       $$ = T_SET;
 	       break;
@@ -324,14 +499,32 @@ pair_item:
    }
  ;
 
+ec_expr:
+   term { $$ = f_eval_int($1); }
+
+ec_kind:
+   RT { $$ = EC_RT; }
+ | RO { $$ = EC_RO; }
+ | UNKNOWN NUM { $$ = $2; }
+ | GENERIC { $$ = EC_GENERIC; }
+ ;
+
+ec_item:
+   '(' ec_kind ',' ec_expr ',' ec_expr ')' { $$ = f_new_ec_item($2, 0, $4, $6, $6); }
+ | '(' ec_kind ',' ec_expr ',' ec_expr DDOT ec_expr ')' { $$ = f_new_ec_item($2, 0, $4, $6, $8); }
+ | '(' ec_kind ',' ec_expr ',' '*' ')' {  $$ = f_new_ec_item($2, 0, $4, 0, EC_ALL); }
+ ;
+
 set_item:
    pair_item
+ | ec_item
  | set_atom { $$ = f_new_item($1, $1); }
  | set_atom DDOT set_atom { $$ = f_new_item($1, $3); }
  ;
 
 switch_item:
    pair_item
+ | ec_item
  | switch_atom { $$ = f_new_item($1, $1); }
  | switch_atom DDOT switch_atom { $$ = f_new_item($1, $3); }
  ;
@@ -411,20 +604,6 @@ bgp_path_tail2:
  | 		      { $$ = NULL; }
  ;
 
-dpair:
-   '(' term ',' term ')' {
-        if (($2->code == 'c') && ($4->code == 'c'))
-          { 
-            if (($2->aux != T_INT) || ($4->aux != T_INT))
-              cf_error( "Can't operate with value of non-integer type in pair constructor" );
-	    check_u16($2->a2.i); check_u16($4->a2.i);
-            $$ = f_new_inst(); $$->code = 'c'; $$->aux = T_PAIR;  $$->a2.i = pair($2->a2.i, $4->a2.i);
-          }
-	else
-	  { $$ = f_new_inst(); $$->code = P('m', 'p'); $$->a1.p = $2; $$->a2.p = $4; }
-    }
- ;
-
 constant:
    NUM    { $$ = f_new_inst(); $$->code = 'c'; $$->aux = T_INT;  $$->a2.i = $1; }
  | TRUE   { $$ = f_new_inst(); $$->code = 'c'; $$->aux = T_BOOL; $$->a2.i = 1;  }
@@ -439,6 +618,11 @@ constant:
  | bgp_path { NEW_F_VAL; $$ = f_new_inst(); $$->code = 'C'; val->type = T_PATH_MASK; val->val.path_mask = $1; $$->a1.p = val; }
  ;
 
+constructor:
+   '(' term ',' term ')' { $$ = f_generate_dpair($2, $4); };
+ | '(' ec_kind ',' term ',' term ')' { $$ = f_generate_ec($2, $4, $6); };
+ ;
+
 
 /*
  *  Maybe there are no dynamic attributes defined by protocols.
@@ -490,6 +674,7 @@ symbol:
        case SYM_VARIABLE | T_INT:
        case SYM_VARIABLE | T_PAIR:
        case SYM_VARIABLE | T_QUAD:
+       case SYM_VARIABLE | T_EC:
        case SYM_VARIABLE | T_STRING:
        case SYM_VARIABLE | T_IP:
        case SYM_VARIABLE | T_PREFIX:
@@ -498,6 +683,7 @@ symbol:
        case SYM_VARIABLE | T_PATH:
        case SYM_VARIABLE | T_PATH_MASK:
        case SYM_VARIABLE | T_CLIST:
+       case SYM_VARIABLE | T_ECLIST:
 	 $$->code = 'V';
 	 $$->a1.p = $1->def;
 	 $$->a2.p = $1->name;
@@ -539,7 +725,7 @@ term:
 
  | symbol   { $$ = $1; }
  | constant { $$ = $1; }
- | dpair    { $$ = $1; }
+ | constructor { $$ = $1; }
 
  | PREFERENCE { $$ = f_new_inst(); $$->code = 'P'; }
 
@@ -563,6 +749,7 @@ term:
 
  | '+' EMPTY '+' { $$ = f_new_inst(); $$->code = 'E'; $$->aux = T_PATH; }
  | '-' EMPTY '-' { $$ = f_new_inst(); $$->code = 'E'; $$->aux = T_CLIST; }
+ | '-' '-' EMPTY '-' '-' { $$ = f_new_inst(); $$->code = 'E'; $$->aux = T_ECLIST; }
  | PREPEND '(' term ',' term ')' { $$ = f_new_inst(); $$->code = P('A','p'); $$->a1.p = $3; $$->a2.p = $5; } 
  | ADD '(' term ',' term ')' { $$ = f_new_inst(); $$->code = P('C','a'); $$->a1.p = $3; $$->a2.p = $5; $$->aux = 'a'; } 
  | DELETE '(' term ',' term ')' { $$ = f_new_inst(); $$->code = P('C','a'); $$->a1.p = $3; $$->a2.p = $5; $$->aux = 'd'; }
@@ -702,12 +889,11 @@ cmd:
    }
 
 
- | rtadot dynamic_attr '.' EMPTY ';' 
-  { struct f_inst *i = f_new_inst(); i->code = 'E'; i->aux = T_CLIST; $$ = $2; $$->code = P('e','S'); $$->a1.p = i; }
+ | rtadot dynamic_attr '.' EMPTY ';' { $$ = f_generate_empty($2); }
  | rtadot dynamic_attr '.' PREPEND '(' term ')' ';'   { $$ = f_generate_complex( P('A','p'), 'x', $2, $6 ); }
- | rtadot dynamic_attr '.' ADD '(' term ')' ';'       { $$ = f_generate_complex( P('C','a'), 'a', $2, $6 ); } 
- | rtadot dynamic_attr '.' DELETE '(' term ')' ';'    { $$ = f_generate_complex( P('C','a'), 'd', $2, $6 ); } 
- | rtadot dynamic_attr '.' FILTER '(' term ')' ';'    { $$ = f_generate_complex( P('C','a'), 'f', $2, $6 ); } 
+ | rtadot dynamic_attr '.' ADD '(' term ')' ';'       { $$ = f_generate_complex( P('C','a'), 'a', $2, $6 ); }
+ | rtadot dynamic_attr '.' DELETE '(' term ')' ';'    { $$ = f_generate_complex( P('C','a'), 'd', $2, $6 ); }
+ | rtadot dynamic_attr '.' FILTER '(' term ')' ';'    { $$ = f_generate_complex( P('C','a'), 'f', $2, $6 ); }
  ;
 
 CF_END
diff --git a/filter/filter.c b/filter/filter.c
index 0f44a6e..98c657b 100644
--- a/filter/filter.c
+++ b/filter/filter.c
@@ -51,10 +51,10 @@
 #define CMP_ERROR 999
 
 static struct adata *
-adata_empty(struct linpool *pool)
+adata_empty(struct linpool *pool, int l)
 {
-  struct adata *res = lp_alloc(pool, sizeof(struct adata));
-  res->length = 0;
+  struct adata *res = lp_alloc(pool, sizeof(struct adata) + l);
+  res->length = l;
   return res;
 }
 
@@ -126,6 +126,13 @@ static inline int uint_cmp(unsigned int i1, unsigned int i2)
   else return 1;
 }
 
+static inline int u64_cmp(u64 i1, u64 i2)
+{
+  if (i1 == i2) return 0;
+  if (i1 < i2) return -1;
+  else return 1;
+}
+
 /**
  * val_compare - compare two values
  * @v1: first value
@@ -167,6 +174,8 @@ val_compare(struct f_val v1, struct f_val v2)
   case T_PAIR:
   case T_QUAD:
     return uint_cmp(v1.val.i, v2.val.i);
+  case T_EC:
+    return u64_cmp(v1.val.ec, v2.val.ec);
   case T_IP:
     return ipa_compare(v1.val.px.ip, v2.val.px.ip);
   case T_PREFIX:
@@ -226,6 +235,9 @@ val_simple_in_range(struct f_val v1, struct f_val v2)
   if ((v1.type == T_IP) && (v2.type == T_CLIST))
     return int_set_contains(v2.val.ad, ipa_to_u32(v1.val.px.ip));
 #endif
+  if ((v1.type == T_EC) && (v2.type == T_ECLIST))
+    return ec_set_contains(v2.val.ad, v1.val.ec);
+
   if ((v1.type == T_STRING) && (v2.type == T_STRING))
     return patmatch(v2.val.s, v1.val.s);
 
@@ -258,6 +270,10 @@ clist_set_type(struct f_tree *set, struct f_val *v)
   }
 }
 
+static inline int
+eclist_set_type(struct f_tree *set)
+{ return set->from.type == T_EC; }
+
 static int
 clist_match_set(struct adata *clist, struct f_tree *set)
 {
@@ -270,6 +286,7 @@ clist_match_set(struct adata *clist, struct f_tree *set)
 
   u32 *l = (u32 *) clist->data;
   u32 *end = l + clist->length/4;
+
   while (l < end) {
     v.val.i = *l++;
     if (find_tree(set, v))
@@ -278,6 +295,30 @@ clist_match_set(struct adata *clist, struct f_tree *set)
   return 0;
 }
 
+static int
+eclist_match_set(struct adata *list, struct f_tree *set)
+{
+  if (!list)
+    return 0;
+
+  if (!eclist_set_type(set))
+    return CMP_ERROR;
+
+  struct f_val v;
+  u32 *l = int_set_get_data(list);
+  int len = int_set_get_size(list);
+  int i;
+
+  v.type = T_EC;
+  for (i = 0; i < len; i += 2) {
+    v.val.ec = ec_get(l, i);
+    if (find_tree(set, v))
+      return 1;
+  }
+
+  return 0;
+}
+
 static struct adata *
 clist_filter(struct linpool *pool, struct adata *clist, struct f_tree *set, int pos)
 {
@@ -302,8 +343,39 @@ clist_filter(struct linpool *pool, struct adata *clist, struct f_tree *set, int
   if (nl == clist->length)
     return clist;
 
-  struct adata *res = lp_alloc(pool, sizeof(struct adata) + nl);
-  res->length = nl;
+  struct adata *res = adata_empty(pool, nl);
+  memcpy(res->data, tmp, nl);
+  return res;
+}
+
+static struct adata *
+eclist_filter(struct linpool *pool, struct adata *list, struct f_tree *set, int pos)
+{
+  if (!list)
+    return NULL;
+
+  struct f_val v;
+
+  int len = int_set_get_size(list);
+  u32 *l = int_set_get_data(list);
+  u32 tmp[len];
+  u32 *k = tmp;
+  int i;
+
+  v.type = T_EC;
+  for (i = 0; i < len; i += 2) {
+    v.val.ec = ec_get(l, i);
+    if (pos == !!find_tree(set, v)) {	/* pos && find_tree || !pos && !find_tree */
+      *k++ = l[i];
+      *k++ = l[i+1];
+    }
+  }
+
+  int nl = (k - tmp) * 4;
+  if (nl == list->length)
+    return list;
+
+  struct adata *res = adata_empty(pool, nl);
   memcpy(res->data, tmp, nl);
   return res;
 }
@@ -332,6 +404,9 @@ val_in_range(struct f_val v1, struct f_val v2)
   if ((v1.type == T_CLIST) && (v2.type == T_SET))
     return clist_match_set(v1.val.ad, v2.val.t);
 
+  if ((v1.type == T_ECLIST) && (v2.type == T_SET))
+    return eclist_match_set(v1.val.ad, v2.val.t);
+
   if (v2.type == T_SET)
     switch (v1.type) {
     case T_ENUM:
@@ -339,6 +414,7 @@ val_in_range(struct f_val v1, struct f_val v2)
     case T_PAIR:
     case T_QUAD:
     case T_IP:
+    case T_EC:
       {
 	struct f_tree *n;
 	n = find_tree(v2.val.t, v1);
@@ -397,11 +473,13 @@ val_print(struct f_val v)
   case T_PREFIX: logn("%I/%d", v.val.px.ip, v.val.px.len); return;
   case T_PAIR: logn("(%d,%d)", v.val.i >> 16, v.val.i & 0xffff); return;
   case T_QUAD: logn("%R", v.val.i); return;
+  case T_EC: ec_format(buf2, v.val.ec); logn("%s", buf2); return;
   case T_PREFIX_SET: trie_print(v.val.ti); return;
   case T_SET: tree_print(v.val.t); return;
   case T_ENUM: logn("(enum %x)%d", v.type, v.val.i); return;
   case T_PATH: as_path_format(v.val.ad, buf2, 1000); logn("(path %s)", buf2); return;
   case T_CLIST: int_set_format(v.val.ad, 1, -1, buf2, 1000); logn("(clist %s)", buf2); return;
+  case T_ECLIST: ec_set_format(v.val.ad, -1, buf2, 1000); logn("(eclist %s)", buf2); return;
   case T_PATH_MASK: pm_format(v.val.path_mask, buf2, 1000); logn("(pathmask%s)", buf2); return;
   default: logn( "[unknown type %x]", v.type ); return;
   }
@@ -541,7 +619,7 @@ interpret(struct f_inst *what)
     break;
 
   case P('m','p'):
-    TWOARGS_C;
+    TWOARGS;
     if ((v1.type != T_INT) || (v2.type != T_INT))
       runtime( "Can't operate with value of non-integer type in pair constructor" );
     u1 = v1.val.i;
@@ -552,6 +630,53 @@ interpret(struct f_inst *what)
     res.type = T_PAIR;
     break;
 
+  case P('m','c'):
+    {
+      TWOARGS;
+
+      int check, ipv4_used;
+      u32 key, val;
+
+      if (v1.type == T_INT) {
+	ipv4_used = 0; key = v1.val.i;
+      } 
+      else if (v1.type == T_QUAD) {
+	ipv4_used = 1; key = v1.val.i;
+      }
+#ifndef IPV6
+      /* IP->Quad implicit conversion */
+      else if (v1.type == T_IP) {
+	ipv4_used = 1; key = ipa_to_u32(v1.val.px.ip);
+      }
+#endif
+      else
+	runtime("Can't operate with key of non-integer/IPv4 type in EC constructor");
+
+      if (v2.type != T_INT)
+	runtime("Can't operate with value of non-integer type in EC constructor");
+      val = v2.val.i;
+
+      res.type = T_EC;
+
+      if (what->aux == EC_GENERIC) {
+	check = 0; res.val.ec = ec_generic(key, val);
+      }
+      else if (ipv4_used) {
+	check = 1; res.val.ec = ec_ip4(what->aux, key, val);
+      }
+      else if (key < 0x10000) {
+	check = 0; res.val.ec = ec_as2(what->aux, key, val);
+      }
+      else {
+	check = 1; res.val.ec = ec_as4(what->aux, key, val);
+      }
+
+      if (check && (val > 0xFFFF))
+	runtime("Can't operate with value out of bounds in EC constructor");
+
+      break;
+    }
+
 /* Relational operators */
 
 #define COMPARE(x) \
@@ -723,9 +848,16 @@ interpret(struct f_inst *what)
 	/* A special case: undefined int_set looks like empty int_set */
 	if ((what->aux & EAF_TYPE_MASK) == EAF_TYPE_INT_SET) {
 	  res.type = T_CLIST;
-	  res.val.ad = adata_empty(f_pool);
+	  res.val.ad = adata_empty(f_pool, 0);
+	  break;
+	}
+	/* The same special case for ec_set */
+	else if ((what->aux & EAF_TYPE_MASK) == EAF_TYPE_EC_SET) {
+	  res.type = T_ECLIST;
+	  res.val.ad = adata_empty(f_pool, 0);
 	  break;
 	}
+
 	/* Undefined value */
 	res.type = T_VOID;
 	break;
@@ -757,6 +889,10 @@ interpret(struct f_inst *what)
 	res.type = T_CLIST;
 	res.val.ad = e->u.ptr;
 	break;
+      case EAF_TYPE_EC_SET:
+	res.type = T_ECLIST;
+	res.val.ad = e->u.ptr;
+	break;
       case EAF_TYPE_UNDEF:
 	res.type = T_VOID;
 	break;
@@ -802,7 +938,12 @@ interpret(struct f_inst *what)
 	break;
       case EAF_TYPE_INT_SET:
 	if (v1.type != T_CLIST)
-	  runtime( "Setting int set attribute to non-clist value" );
+	  runtime( "Setting clist attribute to non-clist value" );
+	l->attrs[0].u.ptr = v1.val.ad;
+	break;
+      case EAF_TYPE_EC_SET:
+	if (v1.type != T_ECLIST)
+	  runtime( "Setting eclist attribute to non-eclist value" );
 	l->attrs[0].u.ptr = v1.val.ad;
 	break;
       case EAF_TYPE_UNDEF:
@@ -926,7 +1067,7 @@ interpret(struct f_inst *what)
 
   case 'E':	/* Create empty attribute */
     res.type = what->aux;
-    res.val.ad = adata_empty(f_pool);
+    res.val.ad = adata_empty(f_pool, 0);
     break;
   case P('A','p'):	/* Path prepend */
     TWOARGS;
@@ -939,52 +1080,93 @@ interpret(struct f_inst *what)
     res.val.ad = as_path_prepend(f_pool, v1.val.ad, v2.val.i);
     break;
 
-  case P('C','a'):	/* Community list add or delete */
+  case P('C','a'):	/* (Extended) Community list add or delete */
     TWOARGS;
-    if (v1.type != T_CLIST)
-      runtime("Can't add/delete to non-clist");
-
-    struct f_val dummy;
-    int arg_set = 0;
-    i = 0;
+    if (v1.type == T_CLIST)
+    {
+      /* Community (or cluster) list */
+      struct f_val dummy;
+      int arg_set = 0;
+      i = 0;
 
-    if ((v2.type == T_PAIR) || (v2.type == T_QUAD))
-      i = v2.val.i;
+      if ((v2.type == T_PAIR) || (v2.type == T_QUAD))
+	i = v2.val.i;
 #ifndef IPV6
-    /* IP->Quad implicit conversion */
-    else if (v2.type == T_IP)
-      i = ipa_to_u32(v2.val.px.ip);
+      /* IP->Quad implicit conversion */
+      else if (v2.type == T_IP)
+	i = ipa_to_u32(v2.val.px.ip);
 #endif
-    else if ((v2.type == T_SET) && clist_set_type(v2.val.t, &dummy))
-      arg_set = 1;
-    else
-      runtime("Can't add/delete non-pair");
+      else if ((v2.type == T_SET) && clist_set_type(v2.val.t, &dummy))
+	arg_set = 1;
+      else
+	runtime("Can't add/delete non-pair");
+
+      res.type = T_CLIST;
+      switch (what->aux)
+      {
+      case 'a':
+	if (arg_set)
+	  runtime("Can't add set");
+	res.val.ad = int_set_add(f_pool, v1.val.ad, i);
+	break;
+      
+      case 'd':
+	if (!arg_set)
+	  res.val.ad = int_set_del(f_pool, v1.val.ad, i);
+	else
+	  res.val.ad = clist_filter(f_pool, v1.val.ad, v2.val.t, 0);
+	break;
 
-    res.type = T_CLIST;
-    switch (what->aux)
+      case 'f':
+	if (!arg_set)
+	  runtime("Can't filter pair");
+	res.val.ad = clist_filter(f_pool, v1.val.ad, v2.val.t, 1);
+	break;
+
+      default:
+	bug("unknown Ca operation");
+      }
+    }
+    else if (v1.type == T_ECLIST)
     {
-    case 'a':
-      if (arg_set)
-	runtime("Can't add set");
-      res.val.ad = int_set_add(f_pool, v1.val.ad, i);
-      break;
+      /* Extended community list */
+      int arg_set = 0;
       
-    case 'd':
-      if (!arg_set)
-	res.val.ad = int_set_del(f_pool, v1.val.ad, i);
-      else
-	res.val.ad = clist_filter(f_pool, v1.val.ad, v2.val.t, 0);
-      break;
+      /* v2.val is either EC or EC-set */
+      if ((v2.type == T_SET) && eclist_set_type(v2.val.t))
+	arg_set = 1;
+      else if (v2.type != T_EC)
+	runtime("Can't add/delete non-pair");
+
+      res.type = T_ECLIST;
+      switch (what->aux)
+      {
+      case 'a':
+	if (arg_set)
+	  runtime("Can't add set");
+	res.val.ad = ec_set_add(f_pool, v1.val.ad, v2.val.ec);
+	break;
+      
+      case 'd':
+	if (!arg_set)
+	  res.val.ad = ec_set_del(f_pool, v1.val.ad, v2.val.ec);
+	else
+	  res.val.ad = eclist_filter(f_pool, v1.val.ad, v2.val.t, 0);
+	break;
 
-    case 'f':
-      if (!arg_set)
-	runtime("Can't filter pair");
-      res.val.ad = clist_filter(f_pool, v1.val.ad, v2.val.t, 1);
-      break;
+      case 'f':
+	if (!arg_set)
+	  runtime("Can't filter ec");
+	res.val.ad = eclist_filter(f_pool, v1.val.ad, v2.val.t, 1);
+	break;
 
-    default:
-      bug("unknown Ca operation");
+      default:
+	bug("unknown Ca operation");
+      }
     }
+    else
+      runtime("Can't add/delete to non-(e)clist");
+
     break;
 
   default:
diff --git a/filter/filter.h b/filter/filter.h
index c3eb8b4..2cf4652 100644
--- a/filter/filter.h
+++ b/filter/filter.h
@@ -46,6 +46,7 @@ struct f_val {
   int type;
   union {
     int i;
+    u64 ec;
     /*    ip_addr ip; Folded into prefix */	
     struct f_prefix px;
     char *s;
@@ -152,6 +153,8 @@ int tree_compare(const void *p1, const void *p2);
 #define T_PATH_MASK 0x23	/* mask for BGP path */
 #define T_PATH 0x24		/* BGP path */
 #define T_CLIST 0x25		/* Community list */
+#define T_ECLIST 0x26		/* Extended community list */
+#define T_EC 0x27		/* Extended community value, u64 */
 
 #define T_RETURN 0x40
 #define T_SET 0x80
diff --git a/filter/test.conf b/filter/test.conf
index ca8e26f..19372f2 100644
--- a/filter/test.conf
+++ b/filter/test.conf
@@ -11,6 +11,7 @@ router id 62.168.0.1;
 define xyzzy = (120+10);
 define '1a-a1' = (20+10);
 define one = 1;
+define ten = 10;
 
 function onef(int a)
 {
@@ -56,6 +57,7 @@ bgpmask pm1;
 bgpmask pm2;
 bgppath p2;
 clist l;
+eclist el;
 {
 	pm1 =  / 4 3 2 1 /;
 	pm2 = [= 4 3 2 1 =];
@@ -118,6 +120,29 @@ clist l;
 	print "Community list (3,1) ", l;
 	l = delete( l, [(*,(onef(5)))] );
 	print "Community list empty ", l;
+
+	el = -- empty --;
+	el = add(el, (rt, 10, 20));
+	el = add(el, (ro, 10.20.30.40, 100));
+	el = add(el, (ro, 11.21.31.41.mask(16), 200));
+	print "EC list (rt, 10, 20) (ro, 10.20.30.40, 100) (ro, 11.21.0.0, 200):";
+	print el;
+	el = delete(el, (rt, 10, 20));
+	el = delete(el, (rt, 10, 30));
+	el = add(el, (unknown 2, ten, 1));
+	el = add(el, (unknown 5, ten, 1));
+	el = add(el, (rt, ten, one+one));
+	el = add(el, (rt, 10, 3));
+	el = add(el, (rt, 10, 4));
+	el = add(el, (rt, 10, 5));
+	el = add(el, (generic, 0x2000a, 3*ten));
+	el = delete(el, [(rt, 10, 2..ten)]);
+	print "EC list (ro, 10.20.30.40, 100) (ro, 11.21.0.0, 200) (rt, 10, 1) (unknown 0x5, 10, 1) (rt, 10, 30):";
+	print el;
+	el = filter(el, [(rt, 10, *)]);
+	print "EC list (rt, 10, 1) (rt, 10, 30): ", el;
+	print "Testing EC list, true: ", (rt, 10, 1) ~ el, " ", el ~ [(rt, 10, ten..40)];
+	print "Testing EC list, false: ", (rt, 10, 20) ~ el, " ", (ro, 10.20.30.40, 100) ~ el, " ", el ~ [(rt, 10, 35..40)], " ", el ~ [(ro, 10, *)];
 }
 
 function bla()
@@ -175,11 +200,13 @@ prefix px;
 ip p;
 pair pp;
 quad qq;
+ec cc;
 int set is;
 int set is1;
 int set is2;
 int set is3;
 pair set ps;
+ec set ecs;
 prefix set pxs;
 string s;
 {
@@ -250,6 +277,19 @@ string s;
 		", true: ", qq = 1.2.3.4, " ", qq ~ [1.2.3.4, 5.6.7.8],
 		", false: ", qq = 4.3.2.1, " ", qq ~ [1.2.1.1, 1.2.3.5];
 
+	cc = (rt, 12345, 200000);
+	print "Testing EC: (rt, 12345, 200000) = ", cc;
+	print "Testing EC: (ro, 100000, 20000) = ", (ro, 100000, 20000);
+	print "Testing EC: (rt, 10.20.30.40, 20000) = ", (rt, 10.20.30.40, 20000);
+	print "  true: ", cc = (rt, 12345, 200000), " ", cc < (rt, 12345, 200010),
+		", false: ", cc = (rt, 12346, 200000), " ", cc = (ro, 12345, 200000), " ",  cc > (rt, 12345, 200010);
+
+	ecs = [(rt, ten, (one+onef(0))*10), (ro, 100000, 100..200), (rt, 12345, *)];
+	print "EC set: ", ecs;
+	print "Testing EC set, true:  ",  (rt, 10, 20) ~ ecs, "  ", (ro, 100000, 100) ~ ecs, "  ", (ro, 100000, 200) ~ ecs,
+		"  ", (rt, 12345, 0) ~ ecs, "  ", cc ~ ecs,  "  ", (rt, 12345, 4000000) ~ ecs;
+	print "Testing EC set, false: ", (ro, 10, 20) ~ ecs, " ", (rt, 10, 21) ~ ecs, " ", (ro, 100000, 99) ~ ecs,
+		" ", (ro, 12345, 10) ~ ecs, " ", (rt, 12346, 0) ~ ecs, " ", (ro, 0.1.134.160, 150) ~ ecs;
 
 	s = "Hello";
 	print "Testing string: ", s, " true: ", s ~ "Hell*", " false: ", s ~ "ell*";