Update.

1999-10-27  Andreas Jaeger  <aj@suse.de>

	* sysdeps/generic/ifreq.h: New file.

	* resolv/res_hconf.c: Add missing includes to get all prototypes.
	(_res_hconf_reorder_addrs): Rewrite.  This never worked before.
	Reported by John DiMarco <jdd@cs.toronto.edu>.

	(_res_hconf_reorder_addrs): Made thread safe.
	(free_mem): New function, needed for malloc debugging.

1999-10-29  Andreas Jaeger  <aj@suse.de>

	* sysdeps/unix/sysv/linux/if_index.c (opensock): Move function to ...
	* sysdeps/generic/opensock.c (__opensock): ...here in a new file.
	* sysdeps/unix/sysv/linux/if_index.c: Change all callers of
	opensock to use __opensock.

	* socket/Makefile (routines): Add opensock.

	* include/sys/socket.h (__opensock): Add prototype declaration.

2 files changed, 146 insertions, 0 deletions

diff --git a/sysdeps/generic/ifreq.h b/sysdeps/generic/ifreq.h
new file mode 100644
index 0000000000..6443c0925b
--- /dev/null
+++ b/sysdeps/generic/ifreq.h
@@ -0,0 +1,76 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+   Contributed by Andreas Jaeger <aj@suse.de>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <net/if.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+
+
+static inline void
+__ifreq (struct ifreq **ifreqs, int *num_ifs)
+{
+  int fd = __opensock ();
+  struct ifconf ifc;
+  int rq_len;
+  int nifs;
+# define RQ_IFS	4
+
+  if (fd < 0)
+    {
+      *num_ifs = 0;
+      *ifreqs = NULL;
+      return;
+    }
+
+  ifc.ifc_buf = NULL;
+  rq_len = RQ_IFS * sizeof (struct ifreq);
+  do
+    {
+      ifc.ifc_len = rq_len;
+      ifc.ifc_buf = realloc (ifc.ifc_buf, ifc.ifc_len);
+      if (ifc.ifc_buf == NULL || __ioctl (fd, SIOCGIFCONF, &ifc) < 0)
+	{
+	  if (ifc.ifc_buf)
+	    free (ifc.ifc_buf);
+	  
+	  __close (fd);
+	  *num_ifs = 0;
+	  *ifreqs = NULL;
+	  return;
+	}
+      rq_len *= 2;
+    }
+  while (rq_len < sizeof (struct ifreq) + ifc.ifc_len);
+
+  nifs = ifc.ifc_len / sizeof (struct ifreq);
+
+  __close (fd);
+
+  *num_ifs = nifs;
+  *ifreqs = realloc (ifc.ifc_buf, nifs * sizeof (struct ifreq));
+}
+
+
+static inline void
+__if_freereq (struct ifreq *ifreqs)
+{
+  free (ifreqs);
+}
diff --git a/sysdeps/generic/opensock.c b/sysdeps/generic/opensock.c
new file mode 100644
index 0000000000..b3e29b5794
--- /dev/null
+++ b/sysdeps/generic/opensock.c
@@ -0,0 +1,70 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <stdio.h>
+#include <sys/socket.h>
+#include <bits/libc-lock.h>
+
+/* Return a socket of any type.  The socket can be used in subsequent
+   ioctl calls to talk to the kernel.  */
+int internal_function
+__opensock (void)
+{
+  /* Cache the last AF that worked, to avoid many redundant calls to
+     socket().  */
+  static int sock_af = -1;
+  int fd = -1;
+  __libc_lock_define_initialized (static, lock);
+
+  if (sock_af != -1)
+    {
+      fd = __socket (sock_af, SOCK_DGRAM, 0);
+      if (fd != -1)
+        return fd;
+    }
+
+  __libc_lock_lock (lock);
+
+  if (sock_af != -1)
+    fd = __socket (sock_af, SOCK_DGRAM, 0);
+
+  if (fd == -1)
+    {
+#ifdef AF_INET
+      fd = __socket (sock_af = AF_INET, SOCK_DGRAM, 0);
+#endif
+#ifdef AF_INET6
+      if (fd < 0)
+	fd = __socket (sock_af = AF_INET6, SOCK_DGRAM, 0);
+#endif
+#ifdef AF_IPX
+      if (fd < 0)
+	fd = __socket (sock_af = AF_IPX, SOCK_DGRAM, 0);
+#endif
+#ifdef AF_AX25
+      if (fd < 0)
+	fd = __socket (sock_af = AF_AX25, SOCK_DGRAM, 0);
+#endif
+#ifdef AF_APPLETALK
+      if (fd < 0)
+	fd = __socket (sock_af = AF_APPLETALK, SOCK_DGRAM, 0);
+#endif
+    }
+
+  __libc_lock_unlock (lock);
+  return fd;
+}