Update.

2000-12-09  H.J. Lu  <hjl@gnu.org>

	* nss/Makefile (routines): Add digits_dots.
	* nss/Versions (libc): Add __nss_hostname_digits_dots to GLIBC_2.2.2.
	* nss/digits_dots.c (__nss_hostname_digits_dots): Turn template
	into a function.
	* nss/nsswitch.h (__nss_hostname_digits_dots): New internal NSS
	function.
	* nss/getXXbyYY.c (H_ERRNO_VAR_P): New definition.
	(TYPE_VAR_P): Likewise.
	(FLAGS_VAR): Likewise.
	(AF_VAR_P): Likewise.
	(INTERNAL (REENTRANT_NAME)): Call __nss_hostname_digits_dots ()
	instead of including digits_dots.c.
	* nss/getXXbyYY_r.c (H_ERRNO_VAR_P): New definition.
	(TYPE_VAR_P): Likewise.
	(FLAGS_VAR): Likewise.
	(AF_VAR_P): Likewise.
	(INTERNAL (REENTRANT_NAME)): Call __nss_hostname_digits_dots ()
	instead of including digits_dots.c.

1 files changed, 146 insertions, 116 deletions

diff --git a/nss/digits_dots.c b/nss/digits_dots.c
index a439207..d3f2209 100644
--- a/nss/digits_dots.c
+++ b/nss/digits_dots.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1999, 2000, 2001 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by H.J. Lu <hjl@gnu.ai.mit.edu>, 1997.
 
@@ -17,15 +17,46 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <wctype.h>
+#include <resolv.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#include "nsswitch.h"
+
 #ifdef USE_NSCD
 # define inet_aton __inet_aton
+# include <nscd/nscd_proto.h>
 #endif
 
+int
+__nss_hostname_digits_dots (const char *name, struct hostent *resbuf,
+			    char **buffer, size_t *buffer_size,
+			    size_t buflen, struct hostent **result,
+			    enum nss_status *status, int *typep,
+			    int flags, int *afp, int *h_errnop)
+{
+  int save;
+
+  /* We have to test for the use of IPv6 which can only be done by
+     examining `_res'.  */
+  if ((_res.options & RES_INIT) == 0 && __res_ninit (&_res) == -1)
+    {
+      if (h_errnop)
+	*h_errnop = NETDB_INTERNAL;
+      *result = NULL;
+      return -1;
+    }
+
   /*
    * disallow names consisting only of digits/dots, unless
    * they end in a dot.
    */
-  if (isdigit (name[0]) || (isxdigit (name[0]) || name[0] == ':'))
+  if (isdigit (name[0]) || isxdigit (name[0]) || name[0] == ':')
     {
       const char *cp;
       char *hostname;
@@ -36,13 +67,14 @@
       char **h_alias_ptr;
       size_t size_needed;
       int addr_size;
-#ifdef HAVE_TYPE
-      int af = type;
-#else
-# ifndef HAVE_AF
-      int af = -1;
-# endif
-#endif
+      int af;
+
+      if (typep != NULL)
+	af = *typep;
+      else if (afp != NULL)
+	af = *afp;
+      else
+	af = -1;
 
       switch (af)
 	{
@@ -55,56 +87,58 @@
 	  break;
 
 	default:
-#ifdef HAVE_TYPE
-	  /* This must not happen.  */
-	  *h_errnop = HOST_NOT_FOUND;
-	  goto done;
-#else
-	  af = (_res.options & RES_USE_INET6) ? AF_INET6 : AF_INET;
-	  addr_size = af == AF_INET6 ? IN6ADDRSZ : INADDRSZ;
+	  if (typep != NULL)
+	    {
+	      /* This must not happen.  */
+	      if (h_errnop != NULL)
+		*h_errnop = HOST_NOT_FOUND;
+	      goto done;
+	    }
+	  else
+	    {
+	      af = (_res.options & RES_USE_INET6) ? AF_INET6 : AF_INET;
+	      addr_size = af == AF_INET6 ? IN6ADDRSZ : INADDRSZ;
+	    }
 	  break;
-#endif
 	}
 
       size_needed = (sizeof (*host_addr)
 		     + sizeof (*h_addr_ptrs) + strlen (name) + 1);
 
-#ifdef HAVE_LOOKUP_BUFFER
-      if (buflen < size_needed)
-	{
-# ifdef NEED_H_ERRNO
-	  *h_errnop = TRY_AGAIN;
-# endif
-	  __set_errno (ERANGE);
-	  goto done;
+      if (buffer_size == NULL)
+        {
+	  if (buflen < size_needed)
+	    {
+	      if (h_errnop != NULL)
+		*h_errnop = TRY_AGAIN;
+	      __set_errno (ERANGE);
+	      goto done;
+	    }
 	}
-#else
-      if (buffer_size < size_needed)
+      else if (buffer_size != NULL && *buffer_size < size_needed)
 	{
 	  char *new_buf;
-	  buffer_size = size_needed;
-	  new_buf = realloc (buffer, buffer_size);
+	  *buffer_size = size_needed;
+	  new_buf = (char *) realloc (*buffer, *buffer_size);
 
 	  if (new_buf == NULL)
 	    {
 	      save = errno;
-	      free (buffer);
-	      buffer = NULL;
-	      buffer_size = 0;
+	      free (*buffer);
+	      *buffer = NULL;
+	      *buffer_size = 0;
 	      __set_errno (save);
-# ifdef NEED_H_ERRNO
-	      *h_errnop = TRY_AGAIN;
-# endif
-	      result = (struct hostent *) NULL;
+	      if (h_errnop != NULL)
+		*h_errnop = TRY_AGAIN;
+	      *result = NULL;
 	      goto done;
 	    }
-	  buffer = new_buf;
+	  *buffer = new_buf;
 	}
-#endif /* HAVE_LOOKUP_BUFFER */
 
-      memset (buffer, 0, size_needed);
+      memset (*buffer, '\0', size_needed);
 
-      host_addr = (host_addr_t *) buffer;
+      host_addr = (host_addr_t *) *buffer;
       h_addr_ptrs = (host_addr_list_t *)
 	((char *) host_addr + sizeof (*host_addr));
       h_alias_ptr = (char **) ((char *) h_addr_ptrs + sizeof (*h_addr_ptrs));
@@ -114,7 +148,7 @@
 	{
 	  for (cp = name;; ++cp)
 	    {
-	      if (!*cp)
+	      if (*cp == '\0')
 		{
 		  int ok;
 
@@ -130,46 +164,40 @@
 		  else
 		    {
 		      assert (af == AF_INET6);
-		      ok = (inet_pton (af, name, host_addr) > 0);
+		      ok = inet_pton (af, name, host_addr) > 0;
 		    }
 		  if (! ok)
 		    {
 		      *h_errnop = HOST_NOT_FOUND;
-#ifndef HAVE_LOOKUP_BUFFER
-		      result = (struct hostent *) NULL;
-#endif
+		      if (buffer_size)
+			*result = NULL;
 		      goto done;
 		    }
 
-		  resbuf.h_name = strcpy (hostname, name);
+		  resbuf->h_name = strcpy (hostname, name);
 		  h_alias_ptr[0] = NULL;
-		  resbuf.h_aliases = h_alias_ptr;
-		  (*h_addr_ptrs)[0] = (char *)host_addr;
-		  (*h_addr_ptrs)[1] = (char *)0;
-		  resbuf.h_addr_list = *h_addr_ptrs;
-		  if (
-#ifdef HAVE_TYPE
-		      type == AF_INET6
-#else
-		      af == AF_INET && (_res.options & RES_USE_INET6)
-#endif
-		      )
+		  resbuf->h_aliases = h_alias_ptr;
+		  (*h_addr_ptrs)[0] = (char *) host_addr;
+		  (*h_addr_ptrs)[1] = NULL;
+		  resbuf->h_addr_list = *h_addr_ptrs;
+		  if ((typep != NULL && *typep == AF_INET6)
+		      || (af == AF_INET
+			  && (_res.options & RES_USE_INET6)))
 		    {
-#ifdef HAVE_TYPE
-		      if ((flags & AI_V4MAPPED) == 0)
+		      if (typep != NULL && (flags & AI_V4MAPPED) == 0)
 			{
 			  /* That's bad.  The user hasn't specified that she
 			     allows IPv4 numeric addresses.  */
-			  result = NULL;
+			  *result = NULL;
 			  *h_errnop = HOST_NOT_FOUND;
 			  goto done;
 			}
 		      else
-#endif
 			{
 			  /* We need to change the IP v4 address into the
 			     IP v6 address.  */
-			  char tmp[INADDRSZ], *p = (char *) host_addr;
+			  char tmp[INADDRSZ];
+			  char *p = (char *) host_addr;
 			  int i;
 
 			  /* Save a copy of the IP v4 address. */
@@ -181,46 +209,47 @@
 			  *p++ = 0xff;
 			  /* Copy the IP v4 address. */
 			  memcpy (p, tmp, INADDRSZ);
-			  resbuf.h_addrtype = AF_INET6;
-			  resbuf.h_length = IN6ADDRSZ;
+			  resbuf->h_addrtype = AF_INET6;
+			  resbuf->h_length = IN6ADDRSZ;
 			}
 		    }
 		  else
 		    {
-		      resbuf.h_addrtype = af;
-		      resbuf.h_length = addr_size;
+		      resbuf->h_addrtype = af;
+		      resbuf->h_length = addr_size;
 		    }
-		  *h_errnop = NETDB_SUCCESS;
-#ifdef HAVE_LOOKUP_BUFFER
-		  status = NSS_STATUS_SUCCESS;
-#else
-		  result = &resbuf;
-#endif
+		  if (h_errnop != NULL)
+		    *h_errnop = NETDB_SUCCESS;
+		  if (buffer_size == NULL)
+		    *status = NSS_STATUS_SUCCESS;
+		  else
+		   *result = resbuf;
 		  goto done;
 		}
 
-	      if (!isdigit (*cp) && *cp != '.') break;
+	      if (!isdigit (*cp) && *cp != '.')
+		break;
 	    }
 	}
 
-      if ((isxdigit (name[0]) && strchr (name, ':') != NULL)
-	  || name[0] == ':')
+      if ((isxdigit (name[0]) && strchr (name, ':') != NULL) || name[0] == ':')
 	{
 	  const char *cp;
 	  char *hostname;
-	  typedef unsigned char host_addr_t [16];
+	  typedef unsigned char host_addr_t[16];
 	  host_addr_t *host_addr;
-	  typedef char *host_addr_list_t [2];
+	  typedef char *host_addr_list_t[2];
 	  host_addr_list_t *h_addr_ptrs;
 	  size_t size_needed;
 	  int addr_size;
-#ifdef HAVE_TYPE
-	  int af = type;
-#else
-# ifndef HAVE_AF
-	  int af = -1;
-# endif
-#endif
+	  int af;
+
+	  if (typep != NULL)
+	    af = *typep;
+	  else if (afp != NULL)
+	    af = *afp;
+	  else
+	    af = -1;
 
 	  switch (af)
 	    {
@@ -237,7 +266,7 @@
 	      /* This is not possible.  We cannot represent an IPv6 address
 		 in an `struct in_addr' variable.  */
 	      *h_errnop = HOST_NOT_FOUND;
-	      result = NULL;
+	      *result = NULL;
 	      goto done;
 
 	    case AF_INET6:
@@ -248,39 +277,35 @@
 	  size_needed = (sizeof (*host_addr)
 			 + sizeof (*h_addr_ptrs) + strlen (name) + 1);
 
-#ifdef HAVE_LOOKUP_BUFFER
-	  if (buflen < size_needed)
+	  if (buffer_size == NULL && buflen < size_needed)
 	    {
-# ifdef NEED_H_ERRNO
-	      *h_errnop = TRY_AGAIN;
-# endif
+	      if (h_errnop != NULL)
+		*h_errnop = TRY_AGAIN;
 	      __set_errno (ERANGE);
 	      goto done;
 	    }
-#else
-	  if (buffer_size < size_needed)
+	  else if (buffer_size != NULL && *buffer_size < size_needed)
 	    {
 	      char *new_buf;
-	      buffer_size = size_needed;
-	      new_buf = realloc (buffer, buffer_size);
+	      *buffer_size = size_needed;
+	      new_buf = realloc (*buffer, *buffer_size);
 
 	      if (new_buf == NULL)
 		{
 		  save = errno;
-		  free (buffer);
+		  free (*buffer);
 		  __set_errno (save);
-		  buffer = NULL;
-		  buffer_size = 0;
-		  result = (struct hostent *) NULL;
+		  *buffer = NULL;
+		  *buffer_size = 0;
+		  *result = NULL;
 		  goto done;
 		}
-	      buffer = new_buf;
+	      *buffer = new_buf;
 	    }
-#endif /* HAVE_LOOKUP_BUFFER */
 
-	  memset (buffer, 0, size_needed);
+	  memset (*buffer, '\0', size_needed);
 
-	  host_addr = (host_addr_t *) buffer;
+	  host_addr = (host_addr_t *) *buffer;
 	  h_addr_ptrs = (host_addr_list_t *)
 	    ((char *) host_addr + sizeof (*host_addr));
 	  hostname = (char *) h_addr_ptrs + sizeof (*h_addr_ptrs);
@@ -297,30 +322,35 @@
 		  if (inet_pton (AF_INET6, name, host_addr) <= 0)
 		    {
 		      *h_errnop = HOST_NOT_FOUND;
-#ifndef HAVE_LOOKUP_BUFFER
-		      result = (struct hostent *) NULL;
-#endif
+		      if (buffer_size)
+			*result = NULL;
 		      goto done;
 		    }
 
-		  resbuf.h_name = strcpy (hostname, name);
+		  resbuf->h_name = strcpy (hostname, name);
 		  h_alias_ptr[0] = NULL;
-		  resbuf.h_aliases = h_alias_ptr;
+		  resbuf->h_aliases = h_alias_ptr;
 		  (*h_addr_ptrs)[0] = (char *) host_addr;
 		  (*h_addr_ptrs)[1] = (char *) 0;
-		  resbuf.h_addr_list = *h_addr_ptrs;
-		  resbuf.h_addrtype = AF_INET6;
-		  resbuf.h_length = addr_size;
+		  resbuf->h_addr_list = *h_addr_ptrs;
+		  resbuf->h_addrtype = AF_INET6;
+		  resbuf->h_length = addr_size;
 		  *h_errnop = NETDB_SUCCESS;
-#ifdef HAVE_LOOKUP_BUFFER
-		  status = NSS_STATUS_SUCCESS;
-#else
-		  result = &resbuf;
-#endif
+		  if (buffer_size == NULL)
+		    *status = NSS_STATUS_SUCCESS;
+		  else
+		    *result = resbuf;
 		  goto done;
 		}
 
-	      if (!isxdigit (*cp) && *cp != ':' && *cp != '.') break;
+	      if (!isxdigit (*cp) && *cp != ':' && *cp != '.')
+		break;
 	    }
 	}
     }
+
+  return 0;
+
+done:
+  return 1;
+}