* sysdeps/mach/hurd/if_index.c: New file.

	* sysdeps/unix/sysv/linux/net/if.h: Moved to ...
	* sysdeps/gnu/net/if.h: here.
	(_IOT_ifconf, _IOT_ifreq): Hurd ioctl type macros moved from ...
	* sysdeps/mach/hurd/net/if.h: ... here; this file now removed.
	* sysdeps/generic/net/if.h: New file.  Declares just the standard
	functions and `struct if_nameindex' type.
	* socket/Makefile (headers): Add net/if.h here.
	* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Not here.
	* sysdeps/mach/hurd/Dist: Remove it here.
	* sysdeps/unix/sysv/linux/Dist: And here.
	* sysdeps/generic/if_index.c: Include <net/if.h>.

8 files changed, 223 insertions, 177 deletions

diff --git a/sysdeps/generic/if_index.c b/sysdeps/generic/if_index.c
index e8af824e66..4dc2a5511a 100644
--- a/sysdeps/generic/if_index.c
+++ b/sysdeps/generic/if_index.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
+/* Copyright (C) 1997,98,99,2000 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -16,8 +16,8 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#include <net/if.h>
 #include <errno.h>
-#define __need_NULL
 #include <stddef.h>
 
 unsigned int
@@ -36,7 +36,6 @@ if_indextoname (unsigned int ifindex, char *ifname)
 }
 stub_warning (if_indextoname)
 
-struct if_nameindex;		/* inhibit warning */
 void
 if_freenameindex (struct if_nameindex *ifn)
 {
diff --git a/sysdeps/generic/net/if.h b/sysdeps/generic/net/if.h
new file mode 100644
index 0000000000..fcfdbdb22a
--- /dev/null
+++ b/sysdeps/generic/net/if.h
@@ -0,0 +1,50 @@
+/* net/if.h -- declarations for inquiring about network interfaces
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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.  */
+
+#ifndef _NET_IF_H
+
+#define _NET_IF_H	1
+#include <features.h>
+
+
+__BEGIN_DECLS
+
+/* Convert an interface name to an index, and vice versa.  */
+
+extern unsigned int if_nametoindex (__const char *__ifname) __THROW;
+extern char *if_indextoname (unsigned int __ifindex, char *__ifname) __THROW;
+
+/* Return a list of all interfaces and their indices.  */
+
+struct if_nameindex
+  {
+    unsigned int if_index;	/* 1, 2, ... */
+    char *if_name;		/* null terminated name: "eth0", ... */
+  };
+
+extern struct if_nameindex *if_nameindex (void) __THROW;
+
+/* Free the data returned from if_nameindex.  */
+
+extern void if_freenameindex (struct if_nameindex *__ptr) __THROW;
+
+__END_DECLS
+
+
+#endif /* net/if.h */
diff --git a/sysdeps/unix/sysv/linux/net/if.h b/sysdeps/gnu/net/if.h
index 9119fc0cc7..c51c735d9c 100644
--- a/sysdeps/unix/sysv/linux/net/if.h
+++ b/sysdeps/gnu/net/if.h
@@ -1,4 +1,5 @@
-/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
+/* net/if.h -- declarations for inquiring about network interfaces
+   Copyright (C) 1997,98,99,2000 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -131,7 +132,6 @@ struct ifreq
 	__caddr_t ifru_data;
       } ifr_ifru;
   };
-
 #define ifr_name	ifr_ifrn.ifrn_name	/* interface name 	*/
 #define ifr_hwaddr	ifr_ifru.ifru_hwaddr	/* MAC address 		*/
 #define	ifr_addr	ifr_ifru.ifru_addr	/* address		*/
@@ -147,6 +147,7 @@ struct ifreq
 #define ifr_ifindex	ifr_ifru.ifru_ivalue    /* interface index      */
 #define ifr_bandwidth	ifr_ifru.ifru_ivalue	/* link bandwidth	*/
 #define ifr_qlen	ifr_ifru.ifru_ivalue	/* queue length		*/
+#define _IOT_ifreq	_IOT(_IOTS(struct ifreq),1,0,0,0,0) /* not right */
 
 
 /* Structure used in SIOCGIFCONF request.  Used to retrieve interface
@@ -164,6 +165,7 @@ struct ifconf
   };
 #define	ifc_buf	ifc_ifcu.ifcu_buf	/* Buffer address.  */
 #define	ifc_req	ifc_ifcu.ifcu_req	/* Array of structures.  */
+#define _IOT_ifconf _IOT(_IOTS(struct ifconf),1,0,0,0,0) /* not right */
 
 __BEGIN_DECLS
 
diff --git a/sysdeps/mach/hurd/Dist b/sysdeps/mach/hurd/Dist
index 71729fd49e..6f9abb25ac 100644
--- a/sysdeps/mach/hurd/Dist
+++ b/sysdeps/mach/hurd/Dist
@@ -7,7 +7,6 @@ libc-ldscript
 libc_p-ldscript
 bits/libc-tsd.h
 net/ethernet.h
-net/if.h
 net/if_arp.h
 net/if_ether.h
 net/if_ppp.h
diff --git a/sysdeps/mach/hurd/if_index.c b/sysdeps/mach/hurd/if_index.c
new file mode 100644
index 0000000000..e8ee999899
--- /dev/null
+++ b/sysdeps/mach/hurd/if_index.c
@@ -0,0 +1,166 @@
+/* Find network interface names and index numbers.  Hurd version.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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 <net/if.h>
+#include <hurd.h>
+#include <hurd/fsys.h>
+#include <string.h>
+#include <sys/mman.h>
+
+static int
+map_interfaces (int domain,
+		unsigned int *idxp,
+		int (*counted_initializer) (unsigned int count,
+					    size_t nameslen),
+		int (*iterator) (const char *))
+{
+  static const char ifopt[] = "--interface=";
+  file_t server;
+  char optsbuf[512], *opts = optsbuf, *p;
+  size_t optslen = sizeof optsbuf;
+  error_t err;
+
+  /* Find the socket server for DOMAIN.  */
+  server = _hurd_socket_server (domain, 0);
+  if (server == MACH_PORT_NULL)
+    return 0;
+
+  err = __file_get_fs_options (server, &opts, &optslen);
+  if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED)
+    {
+      /* On the first use of the socket server during the operation,
+	 allow for the old server port dying.  */
+      server = _hurd_socket_server (domain, 1);
+      if (server == MACH_PORT_NULL)
+	return -1;
+      err = __file_get_fs_options (server, &opts, &optslen);
+    }
+  if (err)
+    return __hurd_fail (err), 0;
+
+  if (counted_initializer)
+    {
+      unsigned int count = 0;
+      size_t nameslen = 0;
+      p = memchr (opts, '\0', optslen);
+      while (p != 0)
+	{
+	  char *end = memchr (p + 1, '\0', optslen - (p - opts));
+	  if (end == 0)
+	    break;
+	  if (optslen - (p - opts) >= sizeof ifopt
+	      && !memcmp (p + 1, ifopt, sizeof ifopt - 1))
+	    {
+	      size_t len = end + 1 - (p + sizeof ifopt);
+	      nameslen += len > IFNAMSIZ+1 ? IFNAMSIZ+1 : len;
+	      ++count;
+	    }
+	  p = end;
+	}
+
+      if ((*counted_initializer) (count, nameslen))
+	return 0;
+    }
+
+  *idxp = 0;
+  for (p = memchr (opts, '\0', optslen); p != 0;
+       p = memchr (p + 1, '\0', optslen - (p - opts)))
+    {
+      ++*idxp;
+      if (optslen - (p - opts) >= sizeof ifopt
+	  && !memcmp (p + 1, ifopt, sizeof ifopt - 1)
+	  && (*iterator) (p + sizeof ifopt))
+	break;
+    }
+
+  if (opts != optsbuf)
+    __munmap (opts, optslen);
+
+  return 1;
+}
+
+unsigned int
+if_nametoindex (const char *ifname)
+{
+  unsigned int idx;
+  int find_name (const char *name)
+    {
+      return !strcmp (name, ifname);
+    }
+  return map_interfaces (PF_INET, &idx, 0, &find_name) ? idx : 0;
+}
+
+char *
+if_indextoname (unsigned int ifindex, char *ifname)
+{
+  unsigned int idx;
+  int find_idx (const char *name)
+    {
+      if (idx == ifindex)
+	{
+	  strncpy (ifname, name, IFNAMSIZ);
+	  return 1;
+	}
+      return 0;
+    }
+  return map_interfaces (PF_INET, &idx, 0, &find_idx) ? ifname : NULL;
+}
+
+
+struct if_nameindex *
+if_nameindex (void)
+{
+  unsigned int idx;
+  struct if_nameindex *buf;
+  char *namep;
+  int alloc (unsigned int count, size_t nameslen)
+    {
+      buf = malloc ((sizeof buf[0] * (count + 1)) + nameslen);
+      if (buf == 0)
+	return 1;
+      buf[count].if_index = 0;
+      buf[count].if_name = NULL;
+      namep = (char *) &buf[count + 1];
+      return 0;
+    }
+  int fill (const char *name)
+    {
+      buf[idx - 1].if_index = idx;
+      buf[idx - 1].if_name = namep;
+      namep = __memccpy (namep, name, '\0', IFNAMSIZ+1) ?: &namep[IFNAMSIZ+1];
+      return 0;
+    }
+
+  return map_interfaces (PF_INET, &idx, &alloc, &fill) ? buf : NULL;
+}
+
+void
+if_freenameindex (struct if_nameindex *ifn)
+{
+  free (ifn);
+}
+
+
+void
+internal_function
+__protocol_available (int *have_inet, int *have_inet6)
+{
+  *have_inet = _hurd_socket_server (PF_INET, 0) != MACH_PORT_NULL;
+  *have_inet6 = _hurd_socket_server (PF_INET6, 0) != MACH_PORT_NULL;
+}
diff --git a/sysdeps/mach/hurd/net/if.h b/sysdeps/mach/hurd/net/if.h
deleted file mode 100644
index 3c0f6665ad..0000000000
--- a/sysdeps/mach/hurd/net/if.h
+++ /dev/null
@@ -1,169 +0,0 @@
-/* Copyright (C) 1997 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   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.  */
-
-#ifndef _NET_IF_H
-
-#define _NET_IF_H	1
-#include <features.h>
-
-#include <sys/types.h>
-#include <sys/socket.h>
-
-/* Standard interface flags. */
-enum
-  {
-    IFF_UP = 0x1,		/* Interface is up.  */
-    IFF_BROADCAST = 0x2,	/* Broadcast address valid.  */
-    IFF_DEBUG = 0x4,		/* Turn on debugging.  */
-    IFF_LOOPBACK = 0x8,		/* Is a loopback net.  */
-    IFF_POINTOPOINT = 0x10,	/* Interface is point-to-point link.  */
-    IFF_NOTRAILERS = 0x20,	/* Avoid use of trailers.  */
-    IFF_RUNNING = 0x40,		/* Resources allocated.  */
-    IFF_NOARP = 0x80,		/* No address resolution protocol.  */
-    IFF_PROMISC = 0x100,	/* Receive all packets.  */
-    /* Not supported */
-    IFF_ALLMULTI = 0x200,	/* Receive all multicast packets.  */
-
-    IFF_MASTER = 0x400,		/* Master of a load balancer.  */
-    IFF_SLAVE = 0x800,		/* Slave of a load balancer.  */
-
-    IFF_MULTICAST = 0x1000	/* Supports multicast.  */
-  };
-
-/* The ifaddr structure contains information about one address of an
-   interface.  They are maintained by the different address families,
-   are allocated and attached when an address is set, and are linked
-   together so all addresses for an interface can be located.  */
-
-struct ifaddr
-  {
-    struct sockaddr ifa_addr;	/* Address of interface.  */
-    union
-      {
-	struct sockaddr	ifu_broadaddr;
-	struct sockaddr	ifu_dstaddr;
-      } ifa_ifu;
-    struct iface *ifa_ifp;	/* Back-pointer to interface.  */
-    struct ifaddr *ifa_next;	/* Next address for interface.  */
-  };
-
-#define	ifa_broadaddr	ifa_ifu.ifu_broadaddr	/* broadcast address	*/
-#define	ifa_dstaddr	ifa_ifu.ifu_dstaddr	/* other end of link	*/
-
-/* Device mapping structure. I'd just gone off and designed a
-   beautiful scheme using only loadable modules with arguments for
-   driver options and along come the PCMCIA people 8)
-
-   Ah well. The get() side of this is good for WDSETUP, and it'll be
-   handy for debugging things. The set side is fine for now and being
-   very small might be worth keeping for clean configuration.  */
-
-struct ifmap
-  {
-    unsigned long int mem_start;
-    unsigned long int mem_end;
-    unsigned short int base_addr;
-    unsigned char irq;
-    unsigned char dma;
-    unsigned char port;
-    /* 3 bytes spare */
-  };
-
-/* Interface request structure used for socket ioctl's.  All interface
-   ioctl's must have parameter definitions which begin with ifr_name.
-   The remainder may be interface specific.  */
-struct ifreq
-  {
-#define IFHWADDRLEN	6
-#define	IFNAMSIZ	16
-    union
-      {
-	char ifrn_name[IFNAMSIZ];	/* Interface name, e.g. "en0".  */
-      } ifr_ifrn;
-
-    union
-      {
-	struct sockaddr ifru_addr;
-	struct sockaddr ifru_dstaddr;
-	struct sockaddr ifru_broadaddr;
-	struct sockaddr ifru_netmask;
-	struct sockaddr ifru_hwaddr;
-	short int ifru_flags;
-	int ifru_ivalue;
-	int ifru_mtu;
-	struct ifmap ifru_map;
-	char ifru_slave[IFNAMSIZ];	/* Just fits the size */
-	__caddr_t ifru_data;
-      } ifr_ifru;
-  };
-
-#define ifr_name	ifr_ifrn.ifrn_name	/* interface name 	*/
-#define ifr_hwaddr	ifr_ifru.ifru_hwaddr	/* MAC address 		*/
-#define	ifr_addr	ifr_ifru.ifru_addr	/* address		*/
-#define	ifr_dstaddr	ifr_ifru.ifru_dstaddr	/* other end of p-p lnk	*/
-#define	ifr_broadaddr	ifr_ifru.ifru_broadaddr	/* broadcast address	*/
-#define	ifr_netmask	ifr_ifru.ifru_netmask	/* interface net mask	*/
-#define	ifr_flags	ifr_ifru.ifru_flags	/* flags		*/
-#define	ifr_metric	ifr_ifru.ifru_ivalue	/* metric		*/
-#define	ifr_mtu		ifr_ifru.ifru_mtu	/* mtu			*/
-#define ifr_map		ifr_ifru.ifru_map	/* device map		*/
-#define ifr_slave	ifr_ifru.ifru_slave	/* slave device		*/
-#define	ifr_data	ifr_ifru.ifru_data	/* for use by interface	*/
-#define ifr_ifindex	ifr_ifru..ifru_ivalue    /* interface index      */
-
-#define _IOT_ifreq \
-_IOT(_IOTS(struct ifreq),1,0,0,0,0)
-
-/* Structure used in SIOCGIFCONF request.  Used to retrieve interface
-   configuration for machine (useful for programs which must know all
-   networks accessible).  */
-
-struct ifconf
-  {
-    int	ifc_len;			/* Size of buffer.  */
-    union
-      {
-	__caddr_t ifcu_buf;
-	struct ifreq *ifcu_req;
-      } ifc_ifcu;
-  };
-#define	ifc_buf	ifc_ifcu.ifcu_buf	/* Buffer address.  */
-#define	ifc_req	ifc_ifcu.ifcu_req	/* Array of structures.  */
-#define _IOT_ifconf \
-_IOT(_IOTS(struct ifconf),1,0,0,0,0)
-
-
-/* Convert an interface name to an index, and vice versa.  */
-
-unsigned int  if_nametoindex(const char *ifname);
-char  *if_indextoname(unsigned int ifindex, char *ifname);
-
-/* Return a list of all interfaces and their indices.  */
-
-struct if_nameindex {
-  unsigned int   if_index;  /* 1, 2, ... */
-  char          *if_name;   /* null terminated name: "eth0", .... */
-};
-
-struct if_nameindex  *if_nameindex(void);
-
-/* Free the data returned from if_nameindex.  */
-
-void  if_freenameindex(struct if_nameindex *ptr);
-
-#endif /* net/if.h */
diff --git a/sysdeps/unix/sysv/linux/Dist b/sysdeps/unix/sysv/linux/Dist
index f21ff4886a..87d9044015 100644
--- a/sysdeps/unix/sysv/linux/Dist
+++ b/sysdeps/unix/sysv/linux/Dist
@@ -23,7 +23,6 @@ socketcall.h
 sysctl.c
 termio.h
 net/ethernet.h
-net/if.h
 net/if_arp.h
 net/if_packet.h
 net/if_ppp.h
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index 0d230664dc..d972f9ca29 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -66,7 +66,7 @@ sysdep_routines += ntp_gettime
 endif
 
 ifeq ($(subdir),socket)
-sysdep_headers += net/if.h net/if_ppp.h net/ppp-comp.h \
+sysdep_headers += net/if_ppp.h net/ppp-comp.h \
 		  net/ppp_defs.h net/if_arp.h net/route.h net/ethernet.h \
 		  net/if_slip.h net/if_packet.h net/if_shaper.h
 sysdep_routines += cmsg_nxthdr sa_len