2005-05-23 Ulrich Drepper <drepper@redhat.com>

* sunrpc/pm_getport.c (__get_socket): New function.
	(pmap_getport): Use it to open a non-reserved socket to the portmapper
	for TCP.
	* include/rpc/pmap_clnt.h (__get_socket): Declare.
	* sunrpc/pm_getmaps.c (pmap_getmaps): Use __get_socket to get an
	non-reserved socket for the portmapper.
	Based on a patch by Steve Dickson <steved@redhat.com>.

	* 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.

ChangeLog

@@ -1,5 +1,17 @@
 2005-05-23  Ulrich Drepper  <drepper@redhat.com>
 
+	* sunrpc/pm_getport.c (__get_socket): New function.
+	(pmap_getport): Use it to open a non-reserved socket to the portmapper
+	for TCP.
+	* include/rpc/pmap_clnt.h (__get_socket): Declare.
+	* sunrpc/pm_getmaps.c (pmap_getmaps): Use __get_socket to get an
+	non-reserved socket for the portmapper.
+	Based on a patch by Steve Dickson <steved@redhat.com>.
+
+	* 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.
+
 	* sysdeps/unix/clock_gettime.c (clock_gettime): Revert last patch.
 
 2005-05-22  Dmitry V. Levin  <ldv@altlinux.org>

include/rpc/pmap_clnt.h

@@ -5,4 +5,8 @@ libc_hidden_proto (pmap_getport)
 libc_hidden_proto (pmap_set)
 libc_hidden_proto (pmap_unset)
 
+/* Defined in pm_getport.c.  */
+extern int __get_socket (struct sockaddr_in *saddr)
+     attribute_hidden internal_function;
+
 #endif

sunrpc/bindrsvprt.c

@@ -43,14 +43,15 @@
 int
 bindresvport (int sd, struct sockaddr_in *sin)
 {
-  int res;
   static short port;
   struct sockaddr_in myaddr;
   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)
     {
@@ -68,17 +69,29 @@ bindresvport (int sd, struct sockaddr_in *sin)
     {
       port = (__getpid () % NPORTS) + STARTPORT;
     }
-  res = -1;
-  __set_errno (EADDRINUSE);
 
-  for (i = 0; i < NPORTS && res < 0 && errno == EADDRINUSE; ++i)
+  /* Initialize to make gcc happy.  */
+  int res = -1;
+
+  int nports = ENDPORT - startport + 1;
+ again:
+  for (i = 0; i < nports; ++i)
     {
       sin->sin_port = htons (port++);
       if (port > ENDPORT)
 	{
-	  port = STARTPORT;
+	  port = startport;
 	}
       res = __bind (sd, sin, sizeof (struct sockaddr_in));
+      if (res >= 0 || errno != EADDRINUSE)
+	break;
+    }
+
+  if (i == nports && startport != LOWPORT)
+    {
+      startport = LOWPORT;
+      nports = STARTPORT - LOWPORT;
+      goto again;
     }
 
   return res;

sunrpc/pm_getmaps.c

@@ -44,9 +44,12 @@ static char sccsid[] = "@(#)pmap_getmaps.c 1.10 87/08/11 Copyr 1984 Sun Micro";
 #include <rpc/pmap_clnt.h>
 #include <sys/socket.h>
 #include <netdb.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <errno.h>
 #include <libintl.h>
+#include <unistd.h>
+
 
 /*
  * Get a copy of the current port maps.
@@ -56,13 +59,19 @@ struct pmaplist *
 pmap_getmaps (struct sockaddr_in *address)
 {
   struct pmaplist *head = (struct pmaplist *) NULL;
-  int socket = -1;
   struct timeval minutetimeout;
   CLIENT *client;
+  bool closeit = false;
 
   minutetimeout.tv_sec = 60;
   minutetimeout.tv_usec = 0;
   address->sin_port = htons (PMAPPORT);
+
+  /* Don't need a reserved port to get ports from the portmapper.  */
+  int socket = __get_socket (address);
+  if (socket != -1)
+    closeit = true;
+
   client = INTUSE(clnttcp_create) (address, PMAPPROG,
 				   PMAPVERS, &socket, 50, 500);
   if (client != (CLIENT *) NULL)
@@ -75,7 +84,9 @@ pmap_getmaps (struct sockaddr_in *address)
 	}
       CLNT_DESTROY (client);
     }
-  /* (void)close(socket); CLNT_DESTROY already closed it */
+  /* We only need to close the socket here if we opened  it.  */
+  if (closeit)
+    (void) __close (socket);
   address->sin_port = 0;
   return head;
 }

sunrpc/pm_getport.c

@@ -38,6 +38,8 @@ static char sccsid[] = "@(#)pmap_getport.c 1.9 87/08/11 Copyr 1984 Sun Micro";
  * Copyright (C) 1984, Sun Microsystems, Inc.
  */
 
+#include <stdbool.h>
+#include <unistd.h>
 #include <rpc/rpc.h>
 #include <rpc/pmap_prot.h>
 #include <rpc/pmap_clnt.h>
@@ -48,6 +50,41 @@ static const struct timeval timeout =
 static const struct timeval tottimeout =
 {60, 0};
 
+/*
+ * Create a socket that is locally bound to a non-reserve port. For
+ * any failures, -1 is returned which will cause the RPC code to
+ * create the socket.
+ */
+int
+internal_function
+__get_socket (struct sockaddr_in *saddr)
+{
+  int so = __socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
+  if (so < 0)
+    return -1;
+
+  struct sockaddr_in laddr;
+  socklen_t namelen = sizeof (laddr);
+  laddr.sin_family = AF_INET;
+  laddr.sin_port = 0;
+  laddr.sin_addr.s_addr = htonl (INADDR_ANY);
+
+  int cc = __bind (so, (struct sockaddr *) &laddr, namelen);
+  if (__builtin_expect (cc < 0, 0))
+    {
+    fail:
+      __close (so);
+      return -1;
+    }
+
+  cc = __connect (so, (struct sockaddr *) saddr, namelen);
+  if (__builtin_expect (cc < 0, 0))
+    goto fail;
+
+  return so;
+}
+
+
 /*
  * Find the mapped port for program,version.
  * Calls the pmap service remotely to do the lookup.
@@ -64,11 +101,18 @@ pmap_getport (address, program, version, protocol)
   int socket = -1;
   CLIENT *client;
   struct pmap parms;
+  bool closeit = false;
 
   address->sin_port = htons (PMAPPORT);
   if (protocol == IPPROTO_TCP)
-    client = INTUSE(clnttcp_create) (address, PMAPPROG, PMAPVERS, &socket,
-				     RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
+    {
+      /* Don't need a reserved port to get ports from the portmapper.  */
+      socket = __get_socket(address);
+      if (socket != -1)
+	closeit = true;
+      client = INTUSE(clnttcp_create) (address, PMAPPROG, PMAPVERS, &socket,
+				       RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
+    }
   else
     client = INTUSE(clntudp_bufcreate) (address, PMAPPROG, PMAPVERS, timeout,
 					&socket, RPCSMALLMSGSIZE,
@@ -93,7 +137,9 @@ pmap_getport (address, program, version, protocol)
 	}
       CLNT_DESTROY (client);
     }
-  /* (void)close(socket); CLNT_DESTROY already closed it */
+  /* We only need to close the socket here if we opened  it.  */
+  if (closeit)
+    (void) __close (socket);
   address->sin_port = 0;
   return port;
 }