1 files changed, 9 insertions, 19 deletions

diff --git a/bsd-bindresvport.c b/bsd-bindresvport.c
index 3ea37ee52..0e91d2658 100644
--- a/bsd-bindresvport.c
+++ b/bsd-bindresvport.c
@@ -47,19 +47,6 @@ static char *rcsid = "$OpenBSD: bindresvport.c,v 1.11 1999/12/17 19:22:08 deraad
 #define ENDPORT (IPPORT_RESERVED - 1)
 #define NPORTS  (ENDPORT - STARTPORT + 1)
 
-#if 0
-/*
- * Bind a socket to a privileged IP port
- */
-int
-bindresvport(sd, sin)
-        int sd;
-        struct sockaddr_in *sin;
-{
-        return bindresvport_af(sd, (struct sockaddr *)sin, AF_INET);
-}
-#endif 
-
 /*
  * Bind a socket to a privileged IP port
  */
@@ -97,17 +84,20 @@ bindresvport_af(sd, sa, af)
         sa->sa_family = af;
 
         if (*portp == 0)
-                *portp = (getpid() % NPORTS) + STARTPORT;
+                *portp = (arc4random() % NPORTS) + STARTPORT;
 
         for(i = 0; i < NPORTS; i++) {
                 error = bind(sd, sa, salen);
-                
-                if ((error == 0) || ((error < 0) && (errno != EADDRINUSE)))
+
+                /* Terminate on success */
+                if (error == 0)
+                        break;
+                        
+                /* Terminate on errors, except "address already in use" */
+                if ((error < 0) && ((errno != EADDRINUSE) || (errno != EINVAL)))
                         break;
                         
-                (*portp)++;
-                if (*portp < ENDPORT)
-                        *portp = STARTPORT;
+                *portp = (i % NPORTS) + STARTPORT;
         }
 
         return (error);