Use inet_pton to parse ext-communities with an IPv4 address.
No need for inet_aton's flexibility.
regress still passes.

OK?

diff --git bgpctl/parser.c bgpctl/parser.c
index 7654051b8b1..ee46bea7efa 100644
--- bgpctl/parser.c
+++ bgpctl/parser.c
@@ -1325,7 +1325,7 @@ parseextvalue(int type, char *s, uint32_t *v, uint32_t *flag)
 		*v = uval | (uvalh << 16);
 		break;
 	case EXT_COMMUNITY_TRANS_IPV4:
-		if (inet_aton(s, &ip) == 0)
+		if (inet_pton(AF_INET, s, &ip) == 0)
 			errx(1, "Bad ext-community %s not parseable", s);
 		*v = ntohl(ip.s_addr);
 		break;
diff --git bgpd/parse.y bgpd/parse.y
index 1621c8a1dff..bc9194e9c99 100644
--- bgpd/parse.y
+++ bgpd/parse.y
@@ -4503,7 +4503,7 @@ parseextvalue(int type, char *s, uint32_t *v, uint32_t *flag)
 		*v = uval | (uvalh << 16);
 		break;
 	case EXT_COMMUNITY_TRANS_IPV4:
-		if (inet_aton(s, &ip) == 0) {
+		if (inet_pton(AF_INET, s, &ip) == 0) {
 			yyerror("Bad ext-community %s not parseable", s);
 			return (-1);
 		}

-- 
In my defence, I have been left unsupervised.