/*

   protocol.c - protocol name and number lookup routines

   Parts of this file were part of the nss_ldap library (as ldap-proto.c)

   which has been forked into the nss-pam-ldapd library.

   Copyright (C) 1997-2005 Luke Howard

   Copyright (C) 2006 West Consulting

   Copyright (C) 2006-2014 Arthur de Jong

   This library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   This 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with this library; if not, write to the Free Software

   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

   02110-1301 USA

*/

#include "config.h"

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#ifdef HAVE_STDINT_H

#include <stdint.h>

#endif /* HAVE_STDINT_H */

#include "common.h"

#include "log.h"

#include "myldap.h"

#include "cfg.h"

#include "attmap.h"

/* ( nisSchema.2.4 NAME 'ipProtocol' SUP top STRUCTURAL

 *   DESC 'Abstraction of an IP protocol. Maps a protocol number

 *         to one or more names. The distinguished value of the cn

 *         attribute denotes the protocol's canonical name'

 *   MUST ( cn $ ipProtocolNumber )

 *    MAY description )

 */

/* the search base for searches */

const char *protocol_bases[NSS_LDAP_CONFIG_MAX_BASES] = { NULL };

/* the search scope for searches */

int protocol_scope = LDAP_SCOPE_DEFAULT;

/* the basic search filter for searches */

const char *protocol_filter = "(objectClass=ipProtocol)";

/* the attributes used in searches */

const char *attmap_protocol_cn               = "cn";

const char *attmap_protocol_ipProtocolNumber = "ipProtocolNumber";

/* the attribute list to request with searches */

static const char *protocol_attrs[3];

static int mkfilter_protocol_byname(const char *name,

                                    char *buffer, size_t buflen)

{

  char safename[BUFLEN_SAFENAME];

  /* escape attribute */

  if (myldap_escape(name, safename, sizeof(safename)))

  {

    log_log(LOG_ERR, "mkfilter_protocol_byname(): safename buffer too small");

    return -1;

  }

  /* build filter */

  return mysnprintf(buffer, buflen, "(&%s(%s=%s))",

                    protocol_filter, attmap_protocol_cn, safename);

}

/* create a search filter for searching a protocol entry

   by uid, return -1 on errors */

static int mkfilter_protocol_bynumber(int protocol,

                                      char *buffer, size_t buflen)

{

  return mysnprintf(buffer, buflen, "(&%s(%s=%d))",

                    protocol_filter, attmap_protocol_ipProtocolNumber, protocol);

}

void protocol_init(void)

{

  int i;

  /* set up search bases */

  if (protocol_bases[0] == NULL)

    for (i = 0; i < NSS_LDAP_CONFIG_MAX_BASES; i++)

      protocol_bases[i] = nslcd_cfg->bases[i];

  /* set up scope */

  if (protocol_scope == LDAP_SCOPE_DEFAULT)

    protocol_scope = nslcd_cfg->scope;

  /* set up attribute list */

  protocol_attrs[0] = attmap_protocol_cn;

  protocol_attrs[1] = attmap_protocol_ipProtocolNumber;

  protocol_attrs[2] = NULL;

}

static int write_protocol(TFILE *fp, MYLDAP_ENTRY *entry, const char *reqname)

{

  int32_t tmpint32, tmp2int32, tmp3int32;

  const char *name;

  const char **aliases;

  const char **protos;

  char *tmp;

  long proto;

  int i;

  /* get the most canonical name */

  name = myldap_get_rdn_value(entry, attmap_protocol_cn);

  /* get the other names for the protocol */

  aliases = myldap_get_values(entry, attmap_protocol_cn);

  if ((aliases == NULL) || (aliases[0] == NULL))

  {

    log_log(LOG_WARNING, "%s: %s: missing",

            myldap_get_dn(entry), attmap_protocol_cn);

    return 0;

  }

  /* if the protocol name is not yet found, get the first entry */

  if (name == NULL)

    name = aliases[0];

  /* check case of returned protocol entry */

  if ((reqname != NULL) && (STR_CMP(reqname, name) != 0))

  {

    for (i = 0; (aliases[i] != NULL) && (STR_CMP(reqname, aliases[i]) != 0); i++)

      /* nothing */ ;

    if (aliases[i] == NULL)

      return 0; /* neither the name nor any of the aliases matched */

  }

  /* get the protocol number */

  protos = myldap_get_values(entry, attmap_protocol_ipProtocolNumber);

  if ((protos == NULL) || (protos[0] == NULL))

  {

    log_log(LOG_WARNING, "%s: %s: missing",

            myldap_get_dn(entry), attmap_protocol_ipProtocolNumber);

    return 0;

  }

  else if (protos[1] != NULL)

  {

    log_log(LOG_WARNING, "%s: %s: multiple values",

            myldap_get_dn(entry), attmap_protocol_ipProtocolNumber);

  }

  errno = 0;

  proto = strtol(protos[0], &tmp, 10);

  if ((*(protos[0]) == '\0') || (*tmp != '\0'))

  {

    log_log(LOG_WARNING, "%s: %s: non-numeric",

            myldap_get_dn(entry), attmap_protocol_ipProtocolNumber);

    return 0;

  }

  else if ((errno != 0) || (proto < 0) || (proto > (long)UINT8_MAX))

  {

    log_log(LOG_WARNING, "%s: %s: out of range",

            myldap_get_dn(entry), attmap_protocol_ipProtocolNumber);

    return 0;

  }

  /* write entry */

  WRITE_INT32(fp, NSLCD_RESULT_BEGIN);

  WRITE_STRING(fp, name);

  WRITE_STRINGLIST_EXCEPT(fp, aliases, name);

  /* proto number is actually an 8-bit value but we write 32 bits anyway */

  WRITE_INT32(fp, proto);

  return 0;

}

NSLCD_HANDLE(

  protocol, byname, NSLCD_ACTION_PROTOCOL_BYNAME,

  char name[BUFLEN_NAME];

  char filter[BUFLEN_FILTER];

  READ_STRING(fp, name);

  log_setrequest("protocol=\"%s\"", name);,

  mkfilter_protocol_byname(name, filter, sizeof(filter)),

  write_protocol(fp, entry, name)

)

NSLCD_HANDLE(

  protocol, bynumber, NSLCD_ACTION_PROTOCOL_BYNUMBER,

  int protocol;

  char filter[BUFLEN_FILTER];

  READ_INT32(fp, protocol);

  log_setrequest("protocol=%lu", (unsigned long int)protocol);,

  mkfilter_protocol_bynumber(protocol, filter, sizeof(filter)),

  write_protocol(fp, entry, NULL)

)

NSLCD_HANDLE(

  protocol, all, NSLCD_ACTION_PROTOCOL_ALL,

  const char *filter;

  log_setrequest("protocol(all)");,

  (filter = protocol_filter, 0),

  write_protocol(fp, entry, NULL)

)