Add support for async DNS

1 files changed, 11 insertions, 1 deletions

diff --git a/utils.h b/utils.h
index ccd4b6d..f87159e 100644
--- a/utils.h
+++ b/utils.h
@@ -25,7 +25,17 @@ void __xfree(const char *fn, int line, void *ptr);
 
 void debug_resource_usage();
 
-#define ADDRSTRLEN (9 /*strlen("AF_INETX ")*/ + INET6_ADDRSTRLEN + 6 /*strlen(" 65535")*/ + 1)
+/* Length of longest DNS name = 253 + trailing dot */
+#define FQDN_STR_LEN 254
+
+/* Length of longest port string = strlen("65535") */
+#define PORT_STR_LEN 5
+
+/* Length of longest address family string = strlen("AF_INETX") */
+#define AF_STR_LEN 8
+
+/* Length of longest addrstr, format = "AF_INETX <IPADDR> <PORT> */
+#define ADDRSTRLEN (AF_STR_LEN + 1 + INET6_ADDRSTRLEN + 1 + PORT_STR_LEN + 1)
 struct saddr {
 	union {
 		struct sockaddr_storage storage;