about summary refs log tree commit diff
path: root/nis/nss_nisplus/nisplus-hosts.c
diff options
context:
space:
mode:
Diffstat (limited to 'nis/nss_nisplus/nisplus-hosts.c')
-rw-r--r--nis/nss_nisplus/nisplus-hosts.c412
1 files changed, 412 insertions, 0 deletions
diff --git a/nis/nss_nisplus/nisplus-hosts.c b/nis/nss_nisplus/nisplus-hosts.c
new file mode 100644
index 0000000000..0a486411de
--- /dev/null
+++ b/nis/nss_nisplus/nisplus-hosts.c
@@ -0,0 +1,412 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
+
+   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 <nss.h>
+#include <netdb.h>
+#include <errno.h>
+#include <ctype.h>
+#include <string.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <libc-lock.h>
+#include <rpcsvc/nis.h>
+#include <rpcsvc/nislib.h>
+
+#include "nss-nisplus.h"
+
+__libc_lock_define_initialized (static, lock)
+
+static nis_result *result = NULL;
+static nis_name *names = NULL;
+
+#define NISENTRYVAL(idx,col,res) \
+        ((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val)
+
+#define NISENTRYLEN(idx,col,res) \
+        ((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len)
+
+/* Get implementation for some internal functions. */
+#include "../../resolv/mapv4v6addr.h"
+#include "../../resolv/mapv4v6hostent.h"
+
+#define ENTNAME         hostent
+#define DATABASE        "hosts"
+#define NEED_H_ERRNO
+
+#define ENTDATA hostent_data
+struct hostent_data
+  {
+    unsigned char host_addr[16];        /* IPv4 or IPv6 address.  */
+    char *h_addr_ptrs[2];       /* Points to that and null terminator.  */
+  };
+
+#define TRAILING_LIST_MEMBER            h_aliases
+#define TRAILING_LIST_SEPARATOR_P       isspace
+#include "../../nss/nss_files/files-parse.c"
+LINE_PARSER
+("#",
+ {
+   char *addr;
+
+   STRING_FIELD (addr, isspace, 1);
+
+   /* Parse address.  */
+   if ((_res.options & RES_USE_INET6)
+       && inet_pton (AF_INET6, addr, entdata->host_addr) > 0)
+     {
+       result->h_addrtype = AF_INET6;
+       result->h_length = IN6ADDRSZ;
+     }
+   else
+     if (inet_pton (AF_INET, addr, entdata->host_addr) > 0)
+       {
+         if (_res.options & RES_USE_INET6)
+           {
+             map_v4v6_address ((char *) entdata->host_addr,
+                               (char *) entdata->host_addr);
+             result->h_addrtype = AF_INET6;
+             result->h_length = IN6ADDRSZ;
+           }
+         else
+           {
+             result->h_addrtype = AF_INET;
+             result->h_length = INADDRSZ;
+           }
+       }
+     else
+       /* Illegal address: ignore line.  */
+       return 0;
+
+   /* Store a pointer to the address in the expected form.  */
+   entdata->h_addr_ptrs[0] = entdata->host_addr;
+   entdata->h_addr_ptrs[1] = NULL;
+   result->h_addr_list = entdata->h_addr_ptrs;
+
+   /* If we need the host entry in IPv6 form change it now.  */
+   if (_res.options & RES_USE_INET6)
+     {
+        char *bufptr = data->linebuffer;
+       size_t buflen = (char *) data + datalen - bufptr;
+       map_v4v6_hostent (result, &bufptr, &buflen);
+     }
+
+   STRING_FIELD (result->h_name, isspace, 1);
+ }
+)
+
+
+static int
+_nss_nisplus_parse_hostent (nis_result *result, struct hostent *host,
+			    char *buffer, size_t buflen)
+{
+  char *p = buffer;
+  size_t room_left = buflen;
+  int parse_res, i;
+  struct parser_data *data = (void *) buffer;
+
+  if (result == NULL)
+    return -1;
+
+  if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS) ||
+      result->objects.objects_val[0].zo_data.zo_type != ENTRY_OBJ ||
+      strcmp(result->objects.objects_val[0].zo_data.objdata_u.en_data.en_type,
+             "hosts_tbl") != 0 ||
+      result->objects.objects_val[0].zo_data.objdata_u.en_data.en_cols.en_cols_len < 4)
+    return -1;
+
+  memset (p, '\0', room_left);
+
+  /* Generate the hosts entry format and use the normal parser */
+  if (NISENTRYLEN (0, 2, result) + 1 > room_left)
+    {
+      __set_errno (ERANGE);
+      return -1;
+    }
+  strncpy (p, NISENTRYVAL (0, 2, result),
+	   NISENTRYLEN (0, 2, result));
+  room_left -= (NISENTRYLEN (0, 2, result) + 1);
+
+  if (NISENTRYLEN (0, 0, result) + 1 > room_left)
+    {
+      __set_errno (ERANGE);
+      return -1;
+    }
+  strcat (p, "\t");
+  strncat (p, NISENTRYVAL (0, 0, result), NISENTRYLEN (0, 0, result));
+  room_left -= (NISENTRYLEN (0, 0, result) + 1);
+                                       /* + 1: We overwrite the last \0 */
+
+  for (i = 1; i < result->objects.objects_len; i++)
+    {
+      if (NISENTRYLEN (i, 1, result) + 1 > room_left)
+	{
+	  __set_errno (ERANGE);
+	  return -1;
+	}
+      strcat (p, " ");
+      strcat (p, NISENTRYVAL (i, 1, result));
+      room_left -= (NISENTRYLEN (i, 1, result) + 1);
+    }
+
+  parse_res = parse_line (p, host, data, buflen);
+
+  return parse_res;
+}
+
+enum nss_status
+_nss_nisplus_sethostent (void)
+{
+  __libc_lock_lock (lock);
+
+  if (result)
+    nis_freeresult (result);
+  result = NULL;
+  if (names)
+    {
+      nis_freenames (names);
+      names = NULL;
+    }
+
+  __libc_lock_unlock (lock);
+
+  return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nisplus_endhostent (void)
+{
+  __libc_lock_lock (lock);
+
+  if (result)
+    nis_freeresult (result);
+  result = NULL;
+  if (names)
+    {
+      nis_freenames (names);
+      names = NULL;
+    }
+
+  __libc_lock_unlock (lock);
+
+  return NSS_STATUS_SUCCESS;
+}
+
+static enum nss_status
+internal_nisplus_gethostent_r (struct hostent *host, char *buffer,
+			       size_t buflen, int *herrnop)
+{
+  int parse_res;
+
+  /* Get the next entry until we found a correct one. */
+  do
+    {
+      if (result == NULL)
+	{
+	  names = nis_getnames("hosts.org_dir");
+	  if (names == NULL || names[0] == NULL)
+	    return NSS_STATUS_UNAVAIL;
+
+	  result = nis_first_entry(names[0]);
+	  if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
+            {
+              int retval;
+
+              retval = niserr2nss (result->status);
+              if (retval == NSS_STATUS_TRYAGAIN)
+                {
+                  *herrnop = NETDB_INTERNAL;
+                  __set_errno (EAGAIN);
+                }
+              return retval;
+            }
+
+	}
+      else
+	{
+	  nis_result *res2;
+
+	  res2 = nis_next_entry(names[0], &result->cookie);
+	  nis_freeresult (result);
+	  result = res2;
+	  if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
+            {
+              int retval;
+
+              retval = niserr2nss (result->status);
+              if (retval == NSS_STATUS_TRYAGAIN)
+                {
+                  *herrnop = NETDB_INTERNAL;
+                  __set_errno (EAGAIN);
+                }
+              return retval;
+            }
+	}
+
+      parse_res = _nss_nisplus_parse_hostent (result, host, buffer, buflen);
+      if (!parse_res && errno == ERANGE)
+        {
+          *herrnop = NETDB_INTERNAL;
+          return NSS_STATUS_TRYAGAIN;
+        }
+
+    } while (!parse_res);
+
+  return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nisplus_gethostent_r (struct hostent *result, char *buffer,
+			   size_t buflen, int *herrnop)
+{
+  int status;
+
+  __libc_lock_lock (lock);
+
+  status = internal_nisplus_gethostent_r (result, buffer, buflen, herrnop);
+
+  __libc_lock_unlock (lock);
+
+  return status;
+}
+
+enum nss_status
+_nss_nisplus_gethostbyname2_r (const char *name, int af, struct hostent *host,
+			      char *buffer, size_t buflen, int *herrnop)
+{
+  int parse_res, retval;
+
+  if (name == NULL)
+    {
+      __set_errno (EINVAL);
+      *herrnop = NETDB_INTERNAL;
+      return NSS_STATUS_NOTFOUND;
+    }
+  else
+    {
+      nis_result *result;
+      char buf[strlen (name) + 255];
+
+      /* Search at first in the alias list, and use the correct name
+	 for the next search */
+      sprintf(buf, "[name=%s],hosts.org_dir", name);
+      result = nis_list(buf, EXPAND_NAME, NULL, NULL);
+
+      /* If we do not find it, try it as original name. But if the
+	 database is correct, we should find it in the first case, too */
+      if ((result->status != NIS_SUCCESS &&
+	   result->status != NIS_S_SUCCESS) ||
+	  result->objects.objects_val[0].zo_data.zo_type != ENTRY_OBJ ||
+	  strcmp(result->objects.objects_val[0].zo_data.objdata_u.en_data.en_type,
+		 "hosts_tbl") != 0 ||
+	  result->objects.objects_val[0].zo_data.objdata_u.en_data.en_cols.en_cols_len
+	  < 3)
+	sprintf(buf, "[cname=%s],hosts.org_dir", name);
+      else
+	sprintf(buf, "[cname=%s],hosts.org_dir", NISENTRYVAL(0, 0, result));
+
+      nis_freeresult (result);
+      result = nis_list(buf, EXPAND_NAME, NULL, NULL);
+
+      retval = niserr2nss (result->status);
+      if (retval != NSS_STATUS_SUCCESS)
+        {
+          if (retval == NSS_STATUS_TRYAGAIN)
+            {
+              __set_errno (EAGAIN);
+              *herrnop = NETDB_INTERNAL;
+            }
+	  nis_freeresult (result);
+          return retval;
+        }
+
+      parse_res = _nss_nisplus_parse_hostent (result, host, buffer, buflen);
+
+      nis_freeresult (result);
+
+      if (parse_res)
+	return NSS_STATUS_SUCCESS;
+
+      *herrnop = NETDB_INTERNAL;
+      if (!parse_res && errno == ERANGE)
+	return NSS_STATUS_TRYAGAIN;
+      else
+	return NSS_STATUS_NOTFOUND;
+    }
+}
+
+enum nss_status
+_nss_nisplus_gethostbyname_r (const char *name, struct hostent *host,
+			      char *buffer, size_t buflen, int *h_errnop)
+{
+  if (_res.options & RES_USE_INET6)
+    {
+      enum nss_status status;
+
+      status = _nss_nisplus_gethostbyname2_r (name, AF_INET6, host, buffer,
+					      buflen, h_errnop);
+      if (status == NSS_STATUS_SUCCESS)
+        return status;
+    }
+
+  return _nss_nisplus_gethostbyname2_r (name, AF_INET, host, buffer,
+					buflen, h_errnop);
+}
+
+enum nss_status
+_nss_nisplus_gethostbyaddr_r (const char *addr, struct hostent *host,
+			      char *buffer, size_t buflen, int *herrnop)
+{
+  if (addr == NULL)
+    return NSS_STATUS_NOTFOUND;
+  else
+    {
+      nis_result *result;
+      char buf[24 + strlen (addr)];
+      int retval, parse_res;
+
+      sprintf(buf, "[addr=%s],hosts.org_dir", addr);
+
+      result = nis_list(buf, EXPAND_NAME, NULL, NULL);
+
+      retval = niserr2nss (result->status);
+      if (retval != NSS_STATUS_SUCCESS)
+        {
+          if (retval == NSS_STATUS_TRYAGAIN)
+            {
+              __set_errno (EAGAIN);
+              *herrnop = NETDB_INTERNAL;
+            }
+	  nis_freeresult (result);
+          return retval;
+        }
+
+      parse_res = _nss_nisplus_parse_hostent (result, host, buffer, buflen);
+
+      nis_freeresult (result);
+
+      if (parse_res)
+	return NSS_STATUS_SUCCESS;
+
+      *herrnop = NETDB_INTERNAL;
+      if (!parse_res && errno == ERANGE)
+	return NSS_STATUS_TRYAGAIN;
+      else
+	return NSS_STATUS_NOTFOUND;
+    }
+}