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authorUlrich Drepper <drepper@redhat.com>2005-05-23 16:40:54 +0000
committerUlrich Drepper <drepper@redhat.com>2005-05-23 16:40:54 +0000
commit3a0cd663c2abc74052d79747777141fad142c52f (patch)
tree97d135adb9aa6be91e8d3a9b747f6c2bbd71f199 /sunrpc/bindrsvprt.c
parent60839ab9520acb7b2018568b41af4ea12320948c (diff)
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* sunrpc/bindrsvprt.c (bindresvport): Try harder to find a port.
	If we tried looking at the usual range without success extend the
	range to even lower ports.q
Diffstat (limited to 'sunrpc/bindrsvprt.c')
-rw-r--r--sunrpc/bindrsvprt.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/sunrpc/bindrsvprt.c b/sunrpc/bindrsvprt.c
index 374518716e..671f229aae 100644
--- a/sunrpc/bindrsvprt.c
+++ b/sunrpc/bindrsvprt.c
@@ -49,8 +49,10 @@ bindresvport (int sd, struct sockaddr_in *sin)
   int i;
 
 #define STARTPORT 600
+#define LOWPORT 200
 #define ENDPORT (IPPORT_RESERVED - 1)
 #define NPORTS	(ENDPORT - STARTPORT + 1)
+  static short startport = STARTPORT;
 
   if (sin == (struct sockaddr_in *) 0)
     {
@@ -71,16 +73,25 @@ bindresvport (int sd, struct sockaddr_in *sin)
   res = -1;
   __set_errno (EADDRINUSE);
 
-  for (i = 0; i < NPORTS && res < 0 && errno == EADDRINUSE; ++i)
+  int nports = ENDPORT - startport + 1;
+ again:
+  for (i = 0; i < nports && res < 0 && errno == EADDRINUSE; ++i)
     {
       sin->sin_port = htons (port++);
       if (port > ENDPORT)
 	{
-	  port = STARTPORT;
+	  port = startport;
 	}
       res = __bind (sd, sin, sizeof (struct sockaddr_in));
     }
 
+  if (i == nports && startport != LOWPORT)
+    {
+      startport = LOWPORT;
+      nports = STARTPORT - LOWPORT;
+      goto again;
+    }
+
   return res;
 }
 libc_hidden_def (bindresvport)