Bgp ecommlist count

bgpd/bgp_clist.c

@@ -504,8 +504,7 @@ static char *community_str_get(struct community *com, int i)
 	return str;
 }
 
-/* Internal function to perform regular expression match for
- * a single community. */
+/* Internal function to perform regular expression match for a single community. */
 static bool community_regexp_include(regex_t *reg, struct community *com, int i)
 {
 	char *str;
@@ -560,6 +559,11 @@ static bool community_regexp_match(struct community *com, regex_t *reg)
 	return rv == 0;
 }
 
+static char *ecommunity_str_get(struct ecommunity *ecom, int i)
+{
+	return ecommunity_ecom2str_one(ecom, ECOMMUNITY_FORMAT_DISPLAY, i);
+}
+
 static char *lcommunity_str_get(struct lcommunity *lcom, int i)
 {
 	struct lcommunity_val lcomval;
@@ -611,6 +615,30 @@ static bool lcommunity_regexp_include(regex_t *reg, struct lcommunity *lcom,
 	return false;
 }
 
+/* Internal function to perform regular expression match for
+ * a single ecommunity. */
+static bool ecommunity_regexp_include(regex_t *reg, struct ecommunity *ecom, int i)
+{
+	char *str;
+
+	/* When there is no communities attribute it is treated as empty string.
+	 */
+	if (ecom == NULL || ecom->size == 0)
+		str = XSTRDUP(MTYPE_ECOMMUNITY_STR, "");
+	else
+		str = ecommunity_str_get(ecom, i);
+
+	/* Regular expression match.  */
+	if (regexec(reg, str, 0, NULL, 0) == 0) {
+		XFREE(MTYPE_ECOMMUNITY_STR, str);
+		return true;
+	}
+
+	XFREE(MTYPE_ECOMMUNITY_STR, str);
+	/* No match.  */
+	return false;
+}
+
 static bool lcommunity_regexp_match(struct lcommunity *com, regex_t *reg)
 {
 	const char *str;
@@ -697,6 +725,24 @@ bool lcommunity_list_match(struct lcommunity *lcom, struct community_list *list)
 	return false;
 }
 
+/* Perform exact matching. In case of expanded extended-community-list, do
+ * same thing as ecommunity_list_match().
+ */
+bool ecommunity_list_exact_match(struct ecommunity *ecom, struct community_list *list)
+{
+	struct community_entry *entry;
+
+	for (entry = list->head; entry; entry = entry->next) {
+		if (entry->style == EXTCOMMUNITY_LIST_STANDARD) {
+			if (ecommunity_cmp(ecom, entry->u.lcom))
+				return entry->direct == COMMUNITY_PERMIT;
+		} else if (entry->style == EXTCOMMUNITY_LIST_EXPANDED) {
+			if (ecommunity_regexp_match(ecom, entry->reg))
+				return entry->direct == COMMUNITY_PERMIT;
+		}
+	}
+	return false;
+}
 
 /* Perform exact matching.  In case of expanded large-community-list, do
  * same thing as lcommunity_list_match().
@@ -981,6 +1027,27 @@ bool lcommunity_list_any_match(struct lcommunity *lcom,
 	return false;
 }
 
+bool ecommunity_list_any_match(struct ecommunity *ecom, struct community_list *list)
+{
+	struct community_entry *entry;
+	uint8_t *ptr;
+	uint32_t i;
+
+	for (i = 0; i < ecom->size; i++) {
+		ptr = ecom->val + (i * ecom->unit_size);
+
+		for (entry = list->head; entry; entry = entry->next) {
+			if ((entry->style == EXTCOMMUNITY_LIST_STANDARD) &&
+			    ecommunity_include_one(entry->u.ecom, ptr))
+				return entry->direct == COMMUNITY_PERMIT;
+			if ((entry->style == EXTCOMMUNITY_LIST_EXPANDED) &&
+			    ecommunity_regexp_include(entry->reg, ecom, i))
+				return entry->direct == COMMUNITY_PERMIT;
+		}
+	}
+	return false;
+}
+
 /* Delete all permitted large communities in the list from com.  */
 struct lcommunity *lcommunity_list_match_delete(struct lcommunity *lcom,
 						struct community_list *list)

bgpd/bgp_clist.h

@@ -158,6 +158,7 @@ extern bool lcommunity_list_match(struct lcommunity *lcom,
 				  struct community_list *list);
 extern bool community_list_exact_match(struct community *com,
 				       struct community_list *list);
+extern bool ecommunity_list_exact_match(struct ecommunity *com, struct community_list *list);
 extern bool lcommunity_list_exact_match(struct lcommunity *lcom,
 					struct community_list *list);
 extern bool community_list_any_match(struct community *com,
@@ -166,6 +167,7 @@ extern struct community *
 community_list_match_delete(struct community *com, struct community_list *list);
 extern bool lcommunity_list_any_match(struct lcommunity *lcom,
 				      struct community_list *list);
+extern bool ecommunity_list_any_match(struct ecommunity *ecom, struct community_list *list);
 extern struct lcommunity *
 lcommunity_list_match_delete(struct lcommunity *lcom,
 			     struct community_list *list);

bgpd/bgp_ecommunity.c

@@ -1145,8 +1145,10 @@ bool ecommunity_has_route_target(struct ecommunity *ecom)
  *
  * Filter is added to display only ECOMMUNITY_ROUTE_TARGET in some cases.
  * 0 value displays all.
+ * Index is a unsigned integer value, and stands for the extended community list entry
+ * to display when value is not -1.
  */
-char *ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter)
+static char *_ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter, int index)
 {
 	uint32_t i;
 	uint8_t *pnt;
@@ -1168,8 +1170,10 @@ char *ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter)
 		bool unk_ecom = false;
 		memset(encbuf, 0x00, sizeof(encbuf));
 
+		if (index != -1 && (uint32_t)index != i)
+			continue;
 		/* Space between each value.  */
-		if (i > 0)
+		if (index == -1 && i > 0)
 			strlcat(str_buf, " ", str_size);
 
 		/* Retrieve value field */
@@ -1496,6 +1500,29 @@ char *ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter)
 	return str_buf;
 }
 
+char *ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter)
+{
+	return _ecommunity_ecom2str(ecom, format, filter, -1);
+}
+
+char *ecommunity_ecom2str_one(struct ecommunity *ecom, int format, int number)
+{
+	return _ecommunity_ecom2str(ecom, format, 0, number);
+}
+
+bool ecommunity_include_one(struct ecommunity *ecom, uint8_t *ptr)
+{
+	uint32_t i;
+	uint8_t *ecom_ptr;
+
+	for (i = 0; i < ecom->size; i++) {
+		ecom_ptr = ecom->val + (i * ecom->unit_size);
+		if (memcmp(ptr, ecom_ptr, ecom->unit_size) == 0)
+			return true;
+	}
+	return false;
+}
+
 bool ecommunity_include(struct ecommunity *e1, struct ecommunity *e2)
 {
 	uint32_t i, j;

bgpd/bgp_ecommunity.h

@@ -379,9 +379,11 @@ extern unsigned int ecommunity_hash_make(const void *);
 extern struct ecommunity *ecommunity_str2com(const char *, int, int);
 extern struct ecommunity *ecommunity_str2com_ipv6(const char *str, int type,
 						  int keyword_included);
-extern char *ecommunity_ecom2str(struct ecommunity *, int, int);
+extern char *ecommunity_ecom2str(struct ecommunity *ecom, int format, int filter);
+extern char *ecommunity_ecom2str_one(struct ecommunity *ecom, int format, int number);
 extern bool ecommunity_has_route_target(struct ecommunity *ecom);
 extern void ecommunity_strfree(char **s);
+extern bool ecommunity_include_one(struct ecommunity *ecom, uint8_t *ptr);
 extern bool ecommunity_include(struct ecommunity *e1, struct ecommunity *e2);
 extern bool ecommunity_match(const struct ecommunity *,
 			     const struct ecommunity *);