--- /dev/null
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+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 "nsswitch.h"
+
+/*******************************************************************\
+|* Here we assume one symbol to be defined: *|
+|* *|
+|* DATABASE_NAME - name of the database the function accesses *|
+|* (e.g., hosts, servicess, ...) *|
+|* *|
+\*******************************************************************/
+
+#define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup)
+#define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post)
+#define CONCAT3_2(Pre, Name, Post) Pre##Name##Post
+
+#define DATABASE_NAME_STRING STRINGIFY1 (DATABASE_NAME)
+#define STRINGIFY1(Name) STRINGIFY2 (Name)
+#define STRINGIFY2(Name) #Name
+
+
+static service_user *database = NULL;
+
+int
+DB_LOOKUP_FCT (service_user **ni, const char *fct_name, void **fctp)
+{
+ if (database == NULL
+ && __nss_database_lookup (DATABASE_NAME_STRING, &database) < 0)
+ return -1;
+
+ *ni = database;
+
+ return __nss_lookup (ni, fct_name, fctp);
+}
--- /dev/null
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+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. */
+
+#define DATABASE_NAME hosts
+
+#include "XXX-lookup.c"
--- /dev/null
+/* Copyright (C) 1996 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 "../nss/nsswitch.h"
+
+/*******************************************************************\
+|* Here we assume several symbols to be defined: *|
+|* *|
+|* LOOKUP_TYPE - the return type of the function *|
+|* *|
+|* FUNCTION_NAME - name of the non-reentrant function *|
+|* *|
+|* DATABASE_NAME - name of the database the function accesses *|
+|* (e.g., host, services, ...) *|
+|* *|
+|* ADD_PARAMS - additional parameter, can vary in number *|
+|* *|
+|* ADD_VARIABLES - names of additional parameter *|
+|* *|
+|* BUFLEN - length of buffer allocated for the non *|
+|* reentrant version *|
+|* *|
+|* Optionally the following vars can be defined: *|
+|* *|
+|* NEED_H_ERRNO - an extra parameter will be passed to point to *|
+|* the global `h_errno' variable. *|
+|* *|
+\*******************************************************************/
+
+/* To make the real sources a bit prettier. */
+#define REENTRANT_NAME APPEND_R (FUNCTION_NAME)
+#define APPEND_R(name) APPEND_R1 (name)
+#define APPEND_R1(name) name##_r
+
+/* Sometimes we need to store error codes in the `h_errno' variable. */
+#ifdef NEED_H_ERRNO
+# define H_ERRNO_PARM , int *h_errnop
+# define H_ERRNO_VAR , &h_errno
+#else
+# define H_ERRNO_PARM
+# define H_ERRNO_VAR
+#endif
+
+
+/* Prototype for reentrant version we use here. */
+extern LOOKUP_TYPE *REENTRANT_NAME (ADD_PARAMS, LOOKUP_TYPE *result,
+ char *buffer, int buflen H_ERRNO_PARM);
+
+LOOKUP_TYPE *
+FUNCTION_NAME (ADD_PARAMS)
+{
+ static LOOKUP_TYPE result;
+ static char buffer[BUFLEN];
+
+ return REENTRANT_NAME (ADD_VARIABLES, &result, buffer, BUFLEN H_ERRNO_VAR);
+}
--- /dev/null
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+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 "nsswitch.h"
+
+/*******************************************************************\
+|* Here we assume several symbols to be defined: *|
+|* *|
+|* LOOKUP_TYPE - the return type of the function *|
+|* *|
+|* FUNCTION_NAME - name of the non-reentrant function *|
+|* *|
+|* DATABASE_NAME - name of the database the function accesses *|
+|* (e.g., host, services, ...) *|
+|* *|
+|* ADD_PARAMS - additional parameter, can vary in number *|
+|* *|
+|* ADD_VARIABLES - names of additional parameter *|
+|* *|
+|* Optionally the following vars can be defined: *|
+|* *|
+|* NEED_H_ERRNO - an extra parameter will be passed to point to *|
+|* the global `h_errno' variable. *|
+|* *|
+|* NEED__RES - the global _res variable might be used so we *|
+|* will have to initialize it if necessary *|
+|* *|
+\*******************************************************************/
+
+/* To make the real sources a bit prettier. */
+#define REENTRANT_NAME APPEND_R (FUNCTION_NAME)
+#define APPEND_R(name) APPEND_R1 (name)
+#define APPEND_R1(name) name##_r
+
+#define FUNCTION_NAME_STRING STRINGIZE (FUNCTION_NAME)
+#define REENTRANT_NAME_STRING STRINGIZE (REENTRANT_NAME)
+#define DATABASE_NAME_STRING STRINGIZE (DATABASE_NAME)
+#define STRINGIZE(name) STRINGIZE1 (name)
+#define STRINGIZE1(name) #name
+
+#define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup)
+#define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post)
+#define CONCAT3_2(Pre, Name, Post) Pre##Name##Post
+
+/* Sometimes we need to store error codes in the `h_errno' variable. */
+#ifdef NEED_H_ERRNO
+# define H_ERRNO_PARM , int *h_errnop
+# define H_ERRNO_VAR , h_errnop
+#else
+# define H_ERRNO_PARM
+# define H_ERRNO_VAR
+#endif
+
+
+/* Type of the lookup function we need here. */
+typedef int (*lookup_function) (ADD_PARAMS, LOOKUP_TYPE *, char *, int
+ H_ERRNO_PARM);
+
+/* Some usages of this file might use this variable. */
+extern struct __res_state _res;
+
+/* The lookup function for the first entry of this service. */
+extern int DB_LOOKUP_FCT (service_user **nip, const char *name, void **fctp);
+
+
+
+LOOKUP_TYPE *
+REENTRANT_NAME (ADD_PARAMS, LOOKUP_TYPE *result, char *buffer, int buflen
+ H_ERRNO_PARM)
+{
+ static service_user *startp = NULL;
+ static lookup_function start_fct;
+ service_user *nip;
+ lookup_function fct;
+ int no_more;
+ enum nss_status status = NSS_STATUS_UNAVAIL;
+
+ if (startp == NULL)
+ {
+ no_more = DB_LOOKUP_FCT (&nip, REENTRANT_NAME_STRING, (void **) &fct);
+ if (no_more)
+ startp = (service_user *) -1;
+ else
+ {
+ startp = nip;
+ start_fct = fct;
+
+#ifdef NEED__RES
+ /* The resolver code will really be used so we have to
+ initialize it. */
+ if ((_res.options & RES_INIT) == 0 && res_init () == -1)
+ {
+ h_errno = NETDB_INTERNAL;
+ return NULL;
+ }
+#endif /* need _res */
+ }
+ }
+ else
+ {
+ fct = start_fct;
+ no_more = (nip = startp) == (service_user *) -1;
+ }
+
+ while (no_more == 0)
+ {
+ status = (*fct) (ADD_VARIABLES, result, buffer, buflen H_ERRNO_VAR);
+
+ no_more = __nss_next (&nip, REENTRANT_NAME_STRING, &fct, status, 0);
+ }
+
+ return status == NSS_STATUS_SUCCESS ? result : NULL;
+}
--- /dev/null
+/* Copyright (C) 1996 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 "nsswitch.h"
+
+/*******************************************************************\
+|* Here we assume several symbols to be defined: *|
+|* *|
+|* LOOKUP_TYPE - the return type of the function *|
+|* *|
+|* GETFUNC_NAME - name of the non-reentrant getXXXent function *|
+|* *|
+|* BUFLEN - size of static buffer *|
+|* *|
+|* Optionally the following vars can be defined: *|
+|* *|
+|* NEED_H_ERRNO - an extra parameter will be passed to point to *|
+|* the global `h_errno' variable. *|
+|* *|
+\*******************************************************************/
+
+/* To make the real sources a bit prettier. */
+#define REENTRANT_GETNAME APPEND_R (GETFUNC_NAME)
+#define APPEND_R(name) APPEND_R1 (name)
+#define APPEND_R1(name) name##_r
+
+/* Sometimes we need to store error codes in the `h_errno' variable. */
+#ifdef NEED_H_ERRNO
+# define H_ERRNO_PARM , int *h_errnop
+# define H_ERRNO_VAR , &h_errno
+#else
+# define H_ERRNO_PARM
+# define H_ERRNO_VAR
+#endif
+
+/* Prototype of the reentrant version. */
+LOOKUP_TYPE *REENTRANT_GETNAME (LOOKUP_TYPE *result, char *buffer,
+ int buflen H_ERRNO_PARM);
+
+
+LOOKUP_TYPE *
+GETFUNC_NAME (void)
+{
+ static char buffer[BUFLEN];
+ LOOKUP_TYPE result;
+
+ return REENTRANT_GETNAME (&result, buffer, BUFLEN H_ERRNO_VAR);
+}
--- /dev/null
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+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. */
+
+#define DATABASE_NAME hosts
+
+#include "XXX-lookup.c"
--- /dev/null
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+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. */
+
+#define DATABASE_NAME networks
+
+#include "XXX-lookup.c"
--- /dev/null
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Extended from original form by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+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. */
+
+/* Parts of this file are plain copies of the file `getnetnamadr.c' from
+ the bind package and it has the following copyright. */
+
+/* Copyright (c) 1993 Carlos Leandro and Rui Salgueiro
+ * Dep. Matematica Universidade de Coimbra, Portugal, Europe
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ */
+/*
+ * Copyright (c) 1983, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <sys/syslog.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+#include <resolv.h>
+
+#include "nsswitch.h"
+
+/* Get implementation for some internal functions. */
+#include "../resolv/mapv4v6addr.h"
+#include "../resolv/mapv4v6hostent.h"
+
+/* Maximum number of aliases we allow. */
+#define MAX_NR_ALIASES 48
+#define MAX_NR_ADDRS 48
+
+#if PACKETSZ > 1024
+# define MAXPACKET PACKETSZ
+#else
+# define MAXPACKET 1024
+#endif
+
+static const char AskedForGot[] = "\
+gethostby*.getanswer: asked for \"%s\", got \"%s\"";
+
+
+/* We need this time later. */
+typedef union querybuf
+{
+ HEADER hdr;
+ u_char buf[MAXPACKET];
+} querybuf;
+
+
+static enum nss_status getanswer_r (const querybuf *answer, int anslen,
+ const char *qname, int qtype,
+ struct hostent *result,
+ char *buffer, int buflen, int *h_errnop);
+
+enum nss_status
+_nss_dns_gethostbyname2_r (const char *name, int af, struct hostent *result,
+ char *buffer, int buflen, int *h_errnop)
+{
+ struct host_data
+ {
+ char *aliases[MAX_NR_ALIASES];
+ unsigned char host_addr[16]; /* IPv4 or IPv6 */
+ char *h_addr_ptrs[MAX_NR_ADDRS + 1];
+ char linebuffer[0];
+ } *host_data = (struct host_data *) buffer;
+ int linebuflen = buflen - offsetof (struct host_data, linebuffer);
+ querybuf host_buffer;
+ int size, type, n;
+ const char *cp;
+
+ switch (af) {
+ case AF_INET:
+ size = INADDRSZ;
+ type = T_A;
+ break;
+ case AF_INET6:
+ size = IN6ADDRSZ;
+ type = T_AAAA;
+ break;
+ default:
+ *h_errnop = NETDB_INTERNAL;
+ errno = EAFNOSUPPORT;
+ return NSS_STATUS_UNAVAIL;
+ }
+
+ result->h_addrtype = af;
+ result->h_length = size;
+
+ /*
+ * if there aren't any dots, it could be a user-level alias.
+ * this is also done in res_query() since we are not the only
+ * function that looks up host names.
+ */
+ if (strchr (name, '.') == NULL && (cp = __hostalias (name)) != NULL)
+ name = cp;
+
+ /*
+ * disallow names consisting only of digits/dots, unless
+ * they end in a dot.
+ */
+ if (isdigit (name[0]))
+ for (cp = name;; ++cp)
+ {
+ if (*cp == '\0')
+ {
+ char *bp;
+
+ if (*--cp == '.')
+ break;
+ /*
+ * All-numeric, no dot at the end. Fake up a hostent
+ * as if we'd actually done a lookup.
+ */
+ if (inet_pton (af, name, host_data->host_addr) <= 0)
+ {
+ *h_errnop = HOST_NOT_FOUND;
+ return NSS_STATUS_NOTFOUND;
+ }
+
+ bp = __stpncpy (host_data->linebuffer, name, linebuflen);
+ host_data->linebuffer[linebuflen - 1] = '\0';
+ linebuflen -= bp - host_data->linebuffer;
+
+ result->h_name = host_data->linebuffer;
+ result->h_aliases = host_data->aliases;
+ host_data->aliases[0] = NULL;
+ host_data->h_addr_ptrs[0] = (char *) host_data->host_addr;
+ host_data->h_addr_ptrs[1] = NULL;
+ result->h_addr_list = host_data->h_addr_ptrs;
+
+ if (_res.options & RES_USE_INET6)
+ map_v4v6_hostent (result, &bp, &linebuflen);
+ *h_errnop = NETDB_SUCCESS;
+ return NSS_STATUS_SUCCESS;
+ }
+ if (!isdigit (*cp) && *cp != '.')
+ break;
+ }
+
+ n = res_search (name, C_IN, type, host_buffer.buf, sizeof (host_buffer));
+ if (n < 0)
+ return errno == ECONNREFUSED ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND;
+
+ return getanswer_r (&host_buffer, n, name, type, result, buffer, buflen,
+ h_errnop);
+}
+
+
+enum nss_status
+_nss_dns_gethostbyname_r (const char *name, struct hostent *result,
+ char *buffer, int buflen, int *h_errnop)
+{
+ enum nss_status status = NSS_STATUS_NOTFOUND;
+
+ if (_res.options & RES_USE_INET6)
+ status = _nss_dns_gethostbyname2_r (name, AF_INET6, result, buffer,
+ buflen, h_errnop);
+ if (status == NSS_STATUS_NOTFOUND)
+ status = _nss_dns_gethostbyname2_r (name, AF_INET, result, buffer,
+ buflen, h_errnop);
+
+ return status;
+}
+
+
+enum nss_status
+_nss_dns_gethostbyaddr_r (const char *addr, int len, int af,
+ struct hostent *result, char *buffer, int buflen,
+ int *h_errnop)
+{
+ static const u_char mapped[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0xff,0xff };
+ static const u_char tunnelled[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 };
+ const u_char *uaddr = (const u_char *)addr;
+ struct host_data
+ {
+ char *aliases[MAX_NR_ALIASES];
+ unsigned char host_addr[16]; /* IPv4 or IPv6 */
+ char *h_addr_ptrs[MAX_NR_ADDRS + 1];
+ char linebuffer[0];
+ } *host_data = (struct host_data *) buffer;
+ querybuf host_buffer;
+ char qbuf[MAXDNAME+1], *qp;
+ int size, n, status;
+
+ if (af == AF_INET6 && len == IN6ADDRSZ &&
+ (bcmp (uaddr, mapped, sizeof mapped) == 0
+ || bcmp (uaddr, tunnelled, sizeof tunnelled) == 0))
+ {
+ /* Unmap. */
+ addr += sizeof mapped;
+ uaddr += sizeof mapped;
+ af = AF_INET;
+ len = INADDRSZ;
+ }
+
+ switch (af)
+ {
+ case AF_INET:
+ size = INADDRSZ;
+ break;
+ case AF_INET6:
+ size = IN6ADDRSZ;
+ break;
+ default:
+ errno = EAFNOSUPPORT;
+ *h_errnop = NETDB_INTERNAL;
+ return NSS_STATUS_UNAVAIL;
+ }
+ if (size != len)
+ {
+ errno = EAFNOSUPPORT;
+ *h_errnop = NETDB_INTERNAL;
+ return NSS_STATUS_UNAVAIL;
+ }
+
+ switch (af)
+ {
+ case AF_INET:
+ sprintf (qbuf, "%u.%u.%u.%u.in-addr.arpa", (uaddr[3] & 0xff),
+ (uaddr[2] & 0xff), (uaddr[1] & 0xff), (uaddr[0] & 0xff));
+ break;
+ case AF_INET6:
+ qp = qbuf;
+ for (n = IN6ADDRSZ - 1; n >= 0; n--)
+ qp += sprintf (qp, "%x.%x.", uaddr[n] & 0xf, (uaddr[n] >> 4) & 0xf);
+ strcpy(qp, "ip6.int");
+ break;
+ default:
+ /* Cannot happen. */
+ }
+
+ n = res_query (qbuf, C_IN, T_PTR, (u_char *)host_buffer.buf,
+ sizeof host_buffer);
+ if (n < 0)
+ return errno == ECONNREFUSED ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND;
+
+ status = getanswer_r (&host_buffer, n, qbuf, T_PTR, result, buffer, buflen,
+ h_errnop);
+ if (status != NSS_STATUS_SUCCESS)
+ return status;
+
+#ifdef SUNSECURITY
+ This is not implemented because it is not possible to use the current
+ source from bind in a multi-threaded program.
+#endif
+
+ result->h_addrtype = af;
+ result->h_length = len;
+ bcopy (addr, host_data->host_addr, len);
+ host_data->h_addr_ptrs[0] = (char *) host_data->host_addr;
+ host_data->h_addr_ptrs[1] = NULL;
+ if (af == AF_INET && (_res.options & RES_USE_INET6))
+ {
+ map_v4v6_address ((char *) host_data->host_addr,
+ (char *) host_data->host_addr);
+ result->h_addrtype = AF_INET6;
+ result->h_length = IN6ADDRSZ;
+ }
+ *h_errnop = NETDB_SUCCESS;
+ return NSS_STATUS_SUCCESS;
+}
+
+
+static enum nss_status
+getanswer_r (const querybuf *answer, int anslen, const char *qname, int qtype,
+ struct hostent *result, char *buffer, int buflen, int *h_errnop)
+{
+ struct host_data
+ {
+ char *aliases[MAX_NR_ALIASES];
+ unsigned char host_addr[16]; /* IPv4 or IPv6 */
+ char *h_addr_ptrs[MAX_NR_ADDRS + 1];
+ char linebuffer[0];
+ } *host_data = (struct host_data *) buffer;
+ int linebuflen = buflen - offsetof (struct host_data, linebuffer);
+ register const HEADER *hp;
+ const u_char *end_of_message, *cp;
+ int n, ancount, qdcount;
+ int haveanswer, had_error;
+ char *bp, **ap, **hap;
+ char tbuf[MAXDNAME+1];
+ const char *tname;
+ int (*name_ok) __P ((const char *));
+
+ tname = qname;
+ result->h_name = NULL;
+ end_of_message = answer->buf + anslen;
+ switch (qtype)
+ {
+ case T_A:
+ case T_AAAA:
+ name_ok = res_hnok;
+ break;
+ case T_PTR:
+ name_ok = res_dnok;
+ break;
+ default:
+ return NSS_STATUS_UNAVAIL; /* XXX should be abort(); */
+ }
+
+ /*
+ * find first satisfactory answer
+ */
+ hp = &answer->hdr;
+ bp = host_data->linebuffer;
+ ancount = ntohs (hp->ancount);
+ qdcount = ntohs (hp->qdcount);
+ cp = answer->buf + HFIXEDSZ;
+ if (qdcount != 1)
+ {
+ *h_errnop = NO_RECOVERY;
+ return NSS_STATUS_UNAVAIL;
+ }
+
+ n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen);
+ if (n < 0 || (*name_ok) (bp) == 0)
+ {
+ *h_errnop = NO_RECOVERY;
+ return NSS_STATUS_UNAVAIL;
+ }
+ cp += n + QFIXEDSZ;
+
+ if (qtype == T_A || qtype == T_AAAA)
+ {
+ /* res_send() has already verified that the query name is the
+ * same as the one we sent; this just gets the expanded name
+ * (i.e., with the succeeding search-domain tacked on).
+ */
+ n = strlen (bp) + 1; /* for the \0 */
+ result->h_name = bp;
+ bp += n;
+ linebuflen -= n;
+ /* The qname can be abbreviated, but h_name is now absolute. */
+ qname = result->h_name;
+ }
+
+ ap = host_data->aliases;
+ *ap = NULL;
+ result->h_aliases = host_data->aliases;
+ hap = host_data->h_addr_ptrs;
+ *hap = NULL;
+ result->h_addr_list = host_data->h_addr_ptrs;
+ haveanswer = 0;
+ had_error = 0;
+
+ while (ancount-- > 0 && cp < end_of_message && had_error == 0)
+ {
+ int type, class;
+
+ n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen);
+ if (n < 0 || (*name_ok) (bp) == 0)
+ {
+ ++had_error;
+ continue;
+ }
+ cp += n; /* name */
+ type = _getshort (cp);
+ cp += INT16SZ; /* type */
+ class = _getshort(cp);
+ cp += INT16SZ + INT32SZ; /* class, TTL */
+ n = _getshort(cp);
+ cp += INT16SZ; /* len */
+ if (class != C_IN)
+ {
+ /* XXX - debug? syslog? */
+ cp += n;
+ continue; /* XXX - had_error++ ? */
+ }
+
+ if ((qtype ==T_A || qtype == T_AAAA) && type == T_CNAME)
+ {
+ if (ap >= &host_data->aliases[MAX_NR_ALIASES - 1])
+ continue;
+ n = dn_expand (answer->buf, end_of_message, cp, tbuf, sizeof tbuf);
+ if (n < 0 || (*name_ok) (tbuf) == 0)
+ {
+ ++had_error;
+ continue;
+ }
+ cp += n;
+ /* Store alias. */
+ *ap++ = bp;
+ n = strlen (bp) + 1; /* For the \0. */
+ bp += n;
+ linebuflen -= n;
+ /* Get canonical name. */
+ n = strlen (tbuf) + 1; /* For the \0. */
+ if (n > buflen)
+ {
+ ++had_error;
+ continue;
+ }
+ strcpy (bp, tbuf);
+ result->h_name = bp;
+ bp += n;
+ linebuflen -= n;
+ continue;
+ }
+
+ if (qtype == T_PTR && type == T_CNAME)
+ {
+ n = dn_expand (answer->buf, end_of_message, cp, tbuf, sizeof tbuf);
+ if (n < 0 || res_hnok (tbuf) == 0)
+ {
+ ++had_error;
+ continue;
+ }
+ cp += n;
+ /* Get canonical name. */
+ n = strlen (tbuf) + 1; /* For the \0. */
+ if (n > buflen)
+ {
+ ++had_error;
+ continue;
+ }
+ strcpy (bp, tbuf);
+ tname = bp;
+ bp += n;
+ linebuflen -= n;
+ continue;
+ }
+ if (type != qtype)
+ {
+ syslog (LOG_NOTICE | LOG_AUTH,
+ "gethostby*.getanswer: asked for \"%s %s %s\", got type \"%s\"",
+ qname, p_class (C_IN), p_type (qtype), p_type (type));
+ cp += n;
+ continue; /* XXX - had_error++ ? */
+ }
+
+ switch (type)
+ {
+ case T_PTR:
+ if (strcasecmp (tname, bp) != 0)
+ {
+ syslog (LOG_NOTICE | LOG_AUTH, AskedForGot, qname, bp);
+ cp += n;
+ continue; /* XXX - had_error++ ? */
+ }
+ n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen);
+ if (n < 0 || res_hnok (bp) == 0)
+ {
+ ++had_error;
+ break;
+ }
+#if MULTI_PTRS_ARE_ALIASES
+ cp += n;
+ if (haveanswer == 0)
+ result->h_name = bp;
+ else if (ap < &host_data->aliases[MAXALIASES-1])
+ *ap++ = bp;
+ else
+ n = -1;
+ if (n != -1)
+ {
+ n = strlen (bp) + 1; /* for the \0 */
+ bp += n;
+ linebuflen -= n;
+ }
+ break;
+#else
+ result->h_name = bp;
+ if (_res.options & RES_USE_INET6)
+ {
+ n = strlen (bp) + 1; /* for the \0 */
+ bp += n;
+ linebuflen -= n;
+ map_v4v6_hostent (result, &bp, &linebuflen);
+ }
+ *h_errnop = NETDB_SUCCESS;
+ return NSS_STATUS_SUCCESS;
+#endif
+ case T_A:
+ case T_AAAA:
+ if (strcasecmp (result->h_name, bp) != 0)
+ {
+ syslog (LOG_NOTICE | LOG_AUTH, AskedForGot, result->h_name, bp);
+ cp += n;
+ continue; /* XXX - had_error++ ? */
+ }
+ if (haveanswer)
+ {
+ if (n != result->h_length)
+ {
+ cp += n;
+ continue;
+ }
+ }
+ else
+ {
+ register int nn;
+
+ result->h_name = bp;
+ nn = strlen (bp) + 1; /* for the \0 */
+ bp += nn;
+ linebuflen -= nn;
+ }
+
+ bp += sizeof (align) - ((u_long) bp % sizeof (align));
+
+ if (n >= linebuflen)
+ {
+ ++had_error;
+ continue;
+ }
+ if (hap >= &host_data->h_addr_ptrs[MAX_NR_ADDRS-1])
+ {
+ cp += n;
+ continue;
+ }
+ bcopy (cp, *hap++ = bp, n);
+ bp += n;
+ cp += n;
+ linebuflen -= n;
+ break;
+ default:
+ abort ();
+ }
+ if (had_error == 0)
+ ++haveanswer;
+ }
+
+ if (haveanswer > 0)
+ {
+ *ap = NULL;
+ *hap = NULL;
+#if defined(RESOLVSORT)
+ /*
+ * Note: we sort even if host can take only one address
+ * in its return structures - should give it the "best"
+ * address in that case, not some random one
+ */
+ if (_res.nsort && haveanswer > 1 && qtype == T_A)
+ addrsort (host_data->h_addr_ptrs, haveanswer);
+#endif /*RESOLVSORT*/
+
+ if (result->h_name == NULL)
+ {
+ n = strlen (qname) + 1; /* For the \0. */
+ if (n > linebuflen)
+ goto try_again;
+ strcpy (bp, qname);
+ result->h_name = bp;
+ bp += n;
+ linebuflen -= n;
+ }
+
+ if (_res.options & RES_USE_INET6)
+ map_v4v6_hostent (result, &bp, &linebuflen);
+ *h_errnop = NETDB_SUCCESS;
+ return NSS_STATUS_SUCCESS;
+ }
+try_again:
+ *h_errnop = TRY_AGAIN;
+ return NSS_STATUS_TRYAGAIN;
+}
--- /dev/null
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+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 <ctype.h>
+#include <dlfcn.h>
+#include <netdb.h>
+#include <libc-lock.h>
+#include <search.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "nsswitch.h"
+#include "../elf/link.h" /* We need some help from ld.so. */
+
+/* Prototypes for the local functions. */
+static void nss_init (void);
+static void *nss_lookup_function (service_user *ni, const char *fct_name);
+static int nss_find_entry (struct entry **knownp, const char *key,
+ void **valp);
+static void nss_insert_entry (struct entry **knownp, const char *key,
+ void *val);
+static name_database *nss_parse_file (const char *fname);
+static name_database_entry *nss_getline (char *line);
+static service_library *nss_new_service (name_database *database,
+ const char *name);
+
+
+__libc_lock_define_initialized (static, lock);
+
+
+/* Global variable. */
+struct __res_state _res;
+
+
+/* Known aliases for service names. */
+static struct {
+ const char *alias;
+ const char *value;
+} service_alias[] =
+{
+ { "nis+", "nisplus" },
+ { "yp", "nis" }
+};
+
+
+/* Nonzero if the sevices are already initialized. */
+static int nss_initialized;
+
+
+/* The root of the whole data base. */
+static name_database *service_table;
+
+
+static void
+nss_init (void)
+{
+ /* Prevent multiple threads to change the service table. */
+ __libc_lock_lock (lock);
+
+ if (service_table == NULL)
+ service_table = nss_parse_file (_PATH_NSSWITCH_CONF);
+
+ __libc_lock_unlock (lock);
+}
+
+
+/* -1 == database not found
+ 0 == database entry pointer stored */
+int
+__nss_database_lookup (const char *database, service_user **ni)
+{
+ /* Return first `service_user' entry for DATABASE.
+ XXX Will use perfect hashing function for known databases. */
+ name_database_entry *entry;
+
+ /* Test whether configuration data is available. */
+ if (service_table == NULL)
+ {
+ if (nss_initialized == 0)
+ nss_init ();
+
+ if (service_table == NULL)
+ return -1;
+ }
+
+ /* XXX Could use some faster mechanism here. But each database is
+ only requested once and so this might not be critical. */
+ for (entry = service_table->entry; entry != NULL; entry = entry->next)
+ if (strcmp (database, entry->name) == 0)
+ break;
+
+ if (entry == NULL || (*ni = entry->service) == NULL)
+ return -1;
+
+ return 0;
+}
+
+
+/* -1 == not found
+ 0 == adjusted for next function */
+int
+__nss_lookup (service_user **ni, const char *fct_name, void **fctp)
+{
+ *fctp = nss_lookup_function (*ni, fct_name);
+
+ while (*fctp == NULL
+ && nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE
+ && (*ni)->next != NULL)
+ {
+ *ni = (*ni)->next;
+
+ *fctp = nss_lookup_function (*ni, fct_name);
+ }
+
+ return *fctp != NULL ? 0 : -1;
+}
+
+
+/* -1 == not found
+ 0 == adjusted for next function
+ 1 == finished */
+int
+__nss_next (service_user **ni, const char *fct_name, void **fctp, int status,
+ int all_values)
+{
+ if (all_values)
+ {
+ if (nss_next_action (*ni, NSS_STATUS_TRYAGAIN) == NSS_ACTION_RETURN
+ && nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_RETURN
+ && nss_next_action (*ni, NSS_STATUS_NOTFOUND) == NSS_ACTION_RETURN
+ && nss_next_action (*ni, NSS_STATUS_SUCCESS) == NSS_ACTION_RETURN)
+ return 1;
+ }
+ else
+ {
+ /* This is really only for debugging. */
+ if (NSS_STATUS_TRYAGAIN > status || status > NSS_STATUS_SUCCESS)
+ __libc_fatal ("illegal status in " __FUNCTION__);
+
+ if (nss_next_action (*ni, status) == NSS_ACTION_RETURN)
+ return 1;
+ }
+
+ if ((*ni)->next == NULL)
+ return -1;
+
+ do
+ {
+ *ni = (*ni)->next;
+
+ *fctp = nss_lookup_function (*ni, fct_name);
+ }
+ while (*fctp == NULL
+ && nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE
+ && (*ni)->next != NULL);
+
+ return *fctp != NULL ? 0 : -1;
+}
+
+
+static int
+nss_dlerror_run (void (*operate) (void))
+{
+ const char *last_errstring = NULL;
+ const char *last_object_name = NULL;
+
+ (void) _dl_catch_error (&last_errstring, &last_object_name, operate);
+
+ return last_errstring != NULL;
+}
+
+
+static void *
+nss_lookup_function (service_user *ni, const char *fct_name)
+{
+ void *result;
+
+ /* Determine whether current function is loaded. */
+ if (nss_find_entry (&ni->known, fct_name, &result) >= 0)
+ return result;
+
+ /* If we failed to allocate the needed data structures for the
+ service return an error. This should only happen when we are out
+ of memory. */
+ if (ni->library == NULL)
+ return NULL;
+
+ /* We now modify global data. Protect it. */
+ __libc_lock_lock (lock);
+
+ if (ni->library->lib_handle == NULL)
+ {
+ /* Load the shared library. */
+ size_t shlen = (7 + strlen (ni->library->name) + 3
+ + sizeof (NSS_SHLIB_REVISION));
+ char shlib_name[shlen];
+
+ void do_open (void)
+ {
+ /* The used function is found in GNU ld.so. XXX The first
+ argument to _dl_open used to be `_dl_loaded'. But this
+ does (currently) not work. */
+ ni->library->lib_handle = _dl_open (shlib_name, RTLD_LAZY);
+ }
+
+ /* Construct name. */
+ __stpcpy (__stpcpy (__stpcpy (shlib_name, "libnss_"), ni->library->name),
+ ".so" NSS_SHLIB_REVISION);
+
+ if (nss_dlerror_run (do_open) != 0)
+ /* Failed to load the library. */
+ ni->library->lib_handle = (void *) -1;
+ }
+
+ if (ni->library->lib_handle == (void *) -1)
+ /* Library not found => function not found. */
+ result = NULL;
+ else
+ {
+ /* Get the desired function. Again, GNU ld.so magic ahead. */
+ size_t namlen = (5 + strlen (ni->library->name) + 1
+ + strlen (fct_name) + 1);
+ char name[namlen];
+ struct link_map *map = ni->library->lib_handle;
+ Elf32_Addr loadbase;
+ const Elf32_Sym *ref = NULL;
+ void get_sym (void)
+ {
+ struct link_map *scope[2] = { map, NULL };
+ loadbase = _dl_lookup_symbol (name, &ref, scope, map->l_name, 0, 0);
+ }
+
+ __stpcpy (__stpcpy (__stpcpy (__stpcpy (name, "_nss_"),
+ ni->library->name),
+ "_"),
+ fct_name);
+
+ result = (nss_dlerror_run (get_sym)
+ ? NULL : (void *) (loadbase + ref->st_value));
+ }
+
+ /* Remember function pointer for the usage. */
+ nss_insert_entry (&ni->known, fct_name, result);
+
+ /* Remove the lock. */
+ __libc_lock_unlock (lock);
+
+ return result;
+}
+
+
+static int
+known_compare (const void *p1, const void *p2)
+{
+ known_function *v1 = (known_function *) p1;
+ known_function *v2 = (known_function *) p2;
+
+ return strcmp (v1->fct_name, v2->fct_name);
+}
+
+
+static int
+nss_find_entry (struct entry **knownp, const char *key, void **valp)
+{
+ known_function looking_for = { fct_name: key };
+ struct entry **found;
+
+ found = __tfind (&looking_for, (const void **) knownp, known_compare);
+
+ if (found == NULL)
+ return -1;
+
+ *valp = ((known_function *) (*found)->key)->fct_ptr;
+
+ return 0;
+}
+
+
+static void
+nss_insert_entry (struct entry **knownp, const char *key, void *val)
+{
+ known_function *to_insert;
+
+ to_insert = (known_function *) malloc (sizeof (known_function));
+ if (to_insert == NULL)
+ return;
+
+ to_insert->fct_name = key;
+ to_insert->fct_ptr = val;
+
+ __tsearch (to_insert, (void **) knownp, known_compare);
+}
+
+
+static name_database *
+nss_parse_file (const char *fname)
+{
+ FILE *fp;
+ name_database *result;
+ name_database_entry *last;
+ char *line;
+ size_t len;
+
+ /* Open the configuration file. */
+ fp = fopen (fname, "r");
+ if (fp == NULL)
+ return NULL;
+
+ result = (name_database *) malloc (sizeof (name_database));
+ if (result == NULL)
+ return NULL;
+
+ result->entry = NULL;
+ result->library = NULL;
+ last = NULL;
+ line = NULL;
+ len = 0;
+ do
+ {
+ name_database_entry *this;
+ ssize_t n;
+ char *cp;
+
+ n = getline (&line, &len, fp);
+ if (n < 0)
+ break;
+ if (line[n - 1] == '\n')
+ line[n - 1] = '\0';
+
+ /* Because the file format does not know any form of quoting we
+ can search forward for the next '#' character and if found
+ make it terminating the line. */
+ cp = strchr (line, '#');
+ if (cp != NULL)
+ *cp = '\0';
+
+ /* If the line is blank it is ignored. */
+ if (line[0] == '\0')
+ continue;
+
+ /* Each line completely specifies the actions for a database. */
+ this = nss_getline (line);
+ if (this != NULL)
+ {
+ if (last != NULL)
+ last->next = this;
+ else
+ result->entry = this;
+
+ last = this;
+ }
+ }
+ while (!feof (fp));
+
+ /* Free the buffer. */
+ free (line);
+ /* Close configuration file. */
+ fclose (fp);
+
+ /* Now create for each service we could use an entry in LIBRARY list. */
+ for (last = result->entry; last != NULL; last = last->next)
+ {
+ service_user *runp;
+
+ for (runp = last->service; runp != NULL; runp = runp->next)
+ runp->library = nss_new_service (result, runp->name);
+ }
+
+ return result;
+}
+
+
+static name_database_entry *
+nss_getline (char *line)
+{
+ const char *name;
+ name_database_entry *result;
+ service_user *last;
+
+ /* Ignore leading white spaces. ATTENTION: this is different from
+ what is implemented in Solaris. The Solaris man page says a line
+ beginning with a white space character is ignored. We regard
+ this as just another misfeature in Solaris. */
+ while (isspace (line[0]))
+ ++line;
+
+ /* Recognize `<database> ":"'. */
+ name = line;
+ while (line[0] != '\0' && !isspace (line[0]) && line[0] != ':')
+ ++line;
+ if (line[0] == '\0' || name == line)
+ /* Syntax error. */
+ return NULL;
+ *line++ = '\0';
+
+ result = (name_database_entry *) malloc (sizeof (name_database_entry));
+ if (result == NULL)
+ return NULL;
+
+ result->name = strdup (name);
+ if (result->name == NULL)
+ {
+ free (result);
+ return NULL;
+ }
+ result->service = NULL;
+ result->next = NULL;
+ last = NULL;
+
+ /* Read the source names: `<source> ( "[" <status> "=" <action> "]" )*'. */
+ while (1)
+ {
+ service_user *new_service;
+ size_t n;
+
+ while (isspace (line[0]))
+ ++line;
+ if (line[0] == '\0')
+ /* No source specified. */
+ return result;
+
+ /* Read <source> identifier. */
+ name = line;
+ while (line[0] != '\0' && !isspace (line[0]) && line[0] != '[')
+ ++line;
+ if (name == line)
+ return result;
+
+
+ new_service = (service_user *) malloc (sizeof (service_user));
+ if (new_service == NULL)
+ return result;
+
+ /* Test whether the source name is one of the aliases. */
+ for (n = 0; n < sizeof (service_alias) / sizeof (service_alias[0]); ++n)
+ if (strncmp (service_alias[n].alias, name, line - name) == 0
+ && service_alias[n].alias[line - name] == '\0')
+ break;
+
+ if (n < sizeof (service_alias) / sizeof (service_alias[0]))
+ new_service->name = service_alias[n].value;
+ else
+ {
+ char *source = (char *) malloc (line - name + 1);
+ if (source == NULL)
+ {
+ free (new_service);
+ return result;
+ }
+ memcpy (source, name, line - name);
+ source[line - name] = '\0';
+
+ new_service->name = source;
+ }
+
+ /* Set default actions. */
+ new_service->actions[2 + NSS_STATUS_TRYAGAIN] = NSS_ACTION_CONTINUE;
+ new_service->actions[2 + NSS_STATUS_UNAVAIL] = NSS_ACTION_CONTINUE;
+ new_service->actions[2 + NSS_STATUS_NOTFOUND] = NSS_ACTION_CONTINUE;
+ new_service->actions[2 + NSS_STATUS_SUCCESS] = NSS_ACTION_RETURN;
+ new_service->library = NULL;
+ new_service->known = NULL;
+ new_service->next = NULL;
+
+ while (isspace (line[0]))
+ ++line;
+
+ if (line[0] == '[')
+ {
+ int status;
+
+ /* Read criterions. */
+ do
+ ++line;
+ while (line[0] != '\0' && isspace (line[0]));
+
+ do
+ {
+ /* Read status name. */
+ name = line;
+ while (line[0] != '\0' && !isspace (line[0]) && line[0] != '='
+ && line[0] != ']')
+ ++line;
+
+ /* Compare with known statii. */
+ if (line - name == 7)
+ {
+ if (strncasecmp (name, "SUCCESS", 7) == 0)
+ status = NSS_STATUS_SUCCESS;
+ else if (strncasecmp (name, "UNAVAIL", 7) == 0)
+ status = NSS_STATUS_UNAVAIL;
+ else
+ return result;
+ }
+ else if (line - name == 8)
+ {
+ if (strncasecmp (name, "NOTFOUND", 8) == 0)
+ status = NSS_STATUS_NOTFOUND;
+ else if (strncasecmp (name, "TRYAGAIN", 8) == 0)
+ status = NSS_STATUS_TRYAGAIN;
+ else
+ return result;
+ }
+ else
+ return result;
+
+ while (isspace (line[0]))
+ ++line;
+ if (line[0] != '=')
+ return result;
+ do
+ ++line;
+ while (isspace (line[0]));
+
+ name = line;
+ while (line[0] != '\0' && !isspace (line[0]) && line[0] != '='
+ && line[0] != ']')
+ ++line;
+
+ if (line - name == 6 && strncasecmp (name, "RETURN", 6) == 0)
+ new_service->actions[2 + status] = NSS_ACTION_RETURN;
+ else if (line - name == 8
+ && strncasecmp (name, "CONTINUE", 8) == 0)
+ new_service->actions[2 + status] = NSS_ACTION_CONTINUE;
+ else
+ return result;
+
+ /* Match white spaces. */
+ while (isspace (line[0]))
+ ++line;
+ }
+ while (line[0] != ']');
+
+ /* Skip the ']'. */
+ ++line;
+ }
+
+ if (last == NULL)
+ result->service = new_service;
+ else
+ last->next = new_service;
+ last = new_service;
+ }
+ /* NOTREACHED */
+ return NULL;
+}
+
+
+static service_library *
+nss_new_service (name_database *database, const char *name)
+{
+ service_library **currentp = &database->library;
+
+ while (*currentp != NULL)
+ {
+ if (strcmp ((*currentp)->name, name) == 0)
+ return *currentp;
+ currentp = &(*currentp)->next;
+ }
+
+ /* We have to add the new service. */
+ *currentp = (service_library *) malloc (sizeof (service_library));
+ if (*currentp == NULL)
+ return NULL;
+
+ (*currentp)->name = name;
+ (*currentp)->lib_handle = NULL;
+ (*currentp)->next = NULL;
+
+ return *currentp;
+}
--- /dev/null
+/* Copyright (C) 1996 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 _NSSWITCH_H
+#define _NSSWITCH_H 1
+
+/* This is an *internal* header. */
+
+#include <arpa/nameser.h>
+#include <netinet/in.h>
+#include <resolv.h>
+#include <search.h>
+
+
+/* Revision number of NSS interface (must be a string). */
+#define NSS_SHLIB_REVISION ".1"
+
+
+/* Possible results of lookup using a nss_* function. */
+enum nss_status
+{
+ NSS_STATUS_TRYAGAIN = -2,
+ NSS_STATUS_UNAVAIL,
+ NSS_STATUS_NOTFOUND,
+ NSS_STATUS_SUCCESS,
+};
+
+
+/* Actions performed after lookup finished. */
+typedef enum
+{
+ NSS_ACTION_CONTINUE,
+ NSS_ACTION_RETURN
+} lookup_actions;
+
+
+typedef struct service_library
+{
+ /* Name of service (`files', `dns', `nis', ...). */
+ const char *name;
+ /* Pointer to the loaded shared library. */
+ void *lib_handle;
+ /* And the link to the next entry. */
+ struct service_library *next;
+} service_library;
+
+
+/* For mappng a function name to a function pointer. */
+typedef struct
+{
+ const char *fct_name;
+ void *fct_ptr;
+} known_function;
+
+
+typedef struct service_user
+{
+ /* Name of the service (`files', `dns', `nis', ...). */
+ const char *name;
+ /* Action according to result. */
+ lookup_actions actions[4];
+ /* Link to the underlying library object. */
+ service_library *library;
+ /* Collection of known functions. */
+ struct entry *known;
+ /* And the link to the next entry. */
+ struct service_user *next;
+} service_user;
+
+/* To access the action based on the status value use this macro. */
+#define nss_next_action(ni, status) ((ni)->actions[2 + status])
+
+
+typedef struct name_database_entry
+{
+ /* Name of the database. */
+ const char *name;
+ /* List of service to be used. */
+ service_user *service;
+ /* And the link to the next entry. */
+ struct name_database_entry *next;
+} name_database_entry;
+
+
+typedef struct name_database
+{
+ /* List of all known databases. */
+ name_database_entry *entry;
+ /* List of libraries with service implementation. */
+ service_library *library;
+} name_database;
+
+
+/* Interface functions for NSS. */
+
+/* Get the data structure representing the specified database. More
+ than one function can use the database. */
+int __nss_database_lookup (const char *database, service_user **ni);
+
+
+/* Put first function with name FCT_NAME for SERVICE in FCTP. The
+ position is remembered in NI. The function returns a value < 0 if
+ an error occured or no such function exists. */
+int __nss_lookup (service_user **ni, const char *fct_name, void **fctp);
+
+/* Determine the next step in the lookup process according to the
+ result STATUS of the call to the last function returned by
+ `__nss_lookup' or `__nss_next'. NI specifies the last function
+ examined. The function return a value > 0 if the process should
+ stop with the last result of the last function call to be the
+ result of the entire lookup. The returned valie is 0 if there is
+ another function to use and < 0 if an error occured.
+
+ If ALL_VALUES is nonzero, the return value will not be > 0 as long as
+ there is a possibility the lookup process can ever use following
+ services. In other words, only if all four lookup results have
+ the action RETURN associated the lookup process stops before the
+ natural end. */
+int __nss_next (service_user **ni, const char *fct_name, void **fctp,
+ int status, int all_values);
+
+
+#endif /* nsswitch.h */
--- /dev/null
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+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. */
+
+#define DATABASE_NAME protocols
+
+#include "XXX-lookup.c"
--- /dev/null
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+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. */
+
+#define DATABASE_NAME services
+
+#include "XXX-lookup.c"
projects / kopensolaris-gnu / glibc.git / commitdiff