randomize _res.id at start; could do better i hope

1 files changed, 7 insertions, 3 deletions

diff --git a/src/lib/libc/net/res_init.c b/src/lib/libc/net/res_init.c
index 355c9ce1b0..85e0c8211e 100644
--- a/src/lib/libc/net/res_init.c
+++ b/src/lib/libc/net/res_init.c
@@ -52,7 +52,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$OpenBSD: res_init.c,v 1.7 1996/09/15 09:31:19 tholo Exp $";
+static char rcsid[] = "$OpenBSD: res_init.c,v 1.8 1996/09/22 02:18:44 deraadt Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/param.h>
@@ -68,6 +68,7 @@ static char rcsid[] = "$OpenBSD: res_init.c,v 1.7 1996/09/15 09:31:19 tholo Exp
 
 static void res_setoptions __P((char *, char *));
 static u_int32_t net_mask __P((struct in_addr));
+static u_int16_t res_randomid __P((void));
 
 /*
  * Resolver state default settings
@@ -113,6 +114,9 @@ res_init()
         int havesearch = 0;
         int nsort = 0;
 
+        if (_res.id == 0)
+                _res.id = res_randomid();
+
         _res.nsaddr.sin_len = sizeof(struct sockaddr_in);
         _res.nsaddr.sin_family = AF_INET;
         _res.nsaddr.sin_port = htons(NAMESERVER_PORT);
@@ -403,8 +407,8 @@ net_mask(in)		/* XXX - should really use system's version of this */
         return (htonl(IN_CLASSC_NET));
 }
 
-u_int16_t
-res_randomid()
+static u_int16_t
+__res_randomid()
 {
         struct timeval now;