/*
   protocols.c - NSS lookup functions for protocol database

   Copyright (C) 2006 West Consulting
   Copyright (C) 2006, 2007, 2008, 2010, 2012 Arthur de Jong
   Copyright (C) 2010 Symas Corporation

   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 <string.h>
#include <errno.h>

#include "prototypes.h"
#include "common.h"
#include "compat/attrs.h"

/* read a single protocol entry from the stream */
static nss_status_t read_protoent(
        TFILE *fp,struct protoent *result,
        char *buffer,size_t buflen,int *errnop)
{
  int32_t tmpint32,tmp2int32,tmp3int32;
  size_t bufptr=0;
  memset(result,0,sizeof(struct protoent));
  READ_BUF_STRING(fp,result->p_name);
  READ_BUF_STRINGLIST(fp,result->p_aliases);
  READ_INT32(fp,result->p_proto);
  return NSS_STATUS_SUCCESS;
}

#ifdef NSS_FLAVOUR_GLIBC

/* get a protocol entry by name */
nss_status_t _nss_ldap_getprotobyname_r(
        const char *name,struct protoent *result,
        char *buffer,size_t buflen,int *errnop)
{
  NSS_BYNAME(NSLCD_ACTION_PROTOCOL_BYNAME,
             name,
             read_protoent(fp,result,buffer,buflen,errnop));
}

/* get a protocol entry by number */
nss_status_t _nss_ldap_getprotobynumber_r(
        int number,struct protoent *result,
        char *buffer,size_t buflen,int *errnop)
{
  NSS_BYINT32(NSLCD_ACTION_PROTOCOL_BYNUMBER,
              number,
              read_protoent(fp,result,buffer,buflen,errnop));
}

/* thread-local file pointer to an ongoing request */
static __thread TFILE *protoentfp;

/* start a request to read all protocol entries */
nss_status_t _nss_ldap_setprotoent(int UNUSED(stayopen))
{
  NSS_SETENT(protoentfp);
}

/* get a single protocol entry */
nss_status_t _nss_ldap_getprotoent_r(
        struct protoent *result,
        char *buffer,size_t buflen,int *errnop)
{
  NSS_GETENT(protoentfp,NSLCD_ACTION_PROTOCOL_ALL,
             read_protoent(protoentfp,result,buffer,buflen,errnop));
}

/* close the stream opened by setprotoent() above */
nss_status_t _nss_ldap_endprotoent(void)
{
  NSS_ENDENT(protoentfp);
}

#endif /* NSS_FLAVOUR_GLIBC */

#ifdef NSS_FLAVOUR_SOLARIS

#ifdef HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN
static char *protoent2str(struct protoent *result,char *buffer,size_t buflen)
{
  int res,i;
  res=snprintf(buffer,buflen,"%s\t\t%d",result->p_name,result->p_proto);
  if ((res<0)||(res>=buflen))
    return NULL;
  if (result->p_aliases)
    for (i=0;result->p_aliases[i];i++)
    {
      strlcat(buffer," ",buflen);
      strlcat(buffer,result->p_aliases[i],buflen);
    }
  if (strlen(buffer)>=buflen-1)
    return NULL;
  return buffer;
}
#endif /* HAVE_STRUCT_NSS_XBYY_ARGS_RETURNLEN */

static nss_status_t read_result(TFILE *fp,nss_XbyY_args_t *args)
{
  READ_RESULT(protoent,&args->erange);
}

static nss_status_t protocols_getprotobyname(nss_backend_t UNUSED(*be),void *args)
{
  NSS_BYNAME(NSLCD_ACTION_PROTOCOL_BYNAME,
             NSS_ARGS(args)->key.name,
             read_result(fp,args));
}

static nss_status_t protocols_getprotobynumber(nss_backend_t UNUSED(*be),void *args)
{
  NSS_BYINT32(NSLCD_ACTION_PROTOCOL_BYNUMBER,
              NSS_ARGS(args)->key.number,
              read_result(fp,args));
}

static nss_status_t protocols_setprotoent(nss_backend_t *be,void UNUSED(*args))
{
  NSS_SETENT(LDAP_BE(be)->fp);
}

static nss_status_t protocols_getprotoent(nss_backend_t *be,void *args)
{
  NSS_GETENT(LDAP_BE(be)->fp,NSLCD_ACTION_PROTOCOL_ALL,
             read_result(LDAP_BE(be)->fp,args));
}

static nss_status_t protocols_endprotoent(nss_backend_t *be,void UNUSED(*args))
{
  NSS_ENDENT(LDAP_BE(be)->fp);
}

static nss_backend_op_t protocols_ops[]={
  nss_ldap_destructor,
  protocols_endprotoent,
  protocols_setprotoent,
  protocols_getprotoent,
  protocols_getprotobyname,
  protocols_getprotobynumber
};

nss_backend_t *_nss_ldap_protocols_constr(const char UNUSED(*db_name),
                  const char UNUSED(*src_name),const char UNUSED(*cfg_args))
{
  return nss_ldap_constructor(protocols_ops,sizeof(protocols_ops));
}

#endif /* NSS_FLAVOUR_SOLARIS */