/*      $NetBSD: getnetent_r.c,v 1.1.1.2 2012/09/09 16:07:57 christos Exp $     */

/*
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 1998-1999 by Internet Software Consortium.
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "Id: getnetent_r.c,v 1.6 2005/09/03 12:41:38 marka Exp ";
#endif /* LIBC_SCCS and not lint */

#include <port_before.h>
#if !defined(_REENTRANT) || !defined(DO_PTHREADS)
       static int getnetent_r_not_required = 0;
#else
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/param.h>
#include <port_after.h>

#ifdef NET_R_RETURN

static NET_R_RETURN
copy_netent(struct netent *, struct netent *, NET_R_COPY_ARGS);

NET_R_RETURN
getnetbyname_r(const char *name,  struct netent *nptr, NET_R_ARGS) {
       struct netent *ne = getnetbyname(name);
#ifdef NET_R_SETANSWER
       int n = 0;

       if (ne == NULL || (n = copy_netent(ne, nptr, NET_R_COPY)) != 0)
               *answerp = NULL;
       else
               *answerp = ne;
       if (ne == NULL)
               *h_errnop = h_errno;
       return (n);
#else
       if (ne == NULL)
               return (NET_R_BAD);

       return (copy_netent(ne, nptr, NET_R_COPY));
#endif
}

#ifndef GETNETBYADDR_ADDR_T
#define GETNETBYADDR_ADDR_T long
#endif
NET_R_RETURN
getnetbyaddr_r(GETNETBYADDR_ADDR_T addr, int type, struct netent *nptr, NET_R_ARGS) {
       struct netent *ne = getnetbyaddr(addr, type);
#ifdef NET_R_SETANSWER
       int n = 0;

       if (ne == NULL || (n = copy_netent(ne, nptr, NET_R_COPY)) != 0)
               *answerp = NULL;
       else
               *answerp = ne;
       if (ne == NULL)
               *h_errnop = h_errno;
       return (n);
#else

       if (ne == NULL)
               return (NET_R_BAD);

       return (copy_netent(ne, nptr, NET_R_COPY));
#endif
}

/*%
*      These assume a single context is in operation per thread.
*      If this is not the case we will need to call irs directly
*      rather than through the base functions.
*/

NET_R_RETURN
getnetent_r(struct netent *nptr, NET_R_ARGS) {
       struct netent *ne = getnetent();
#ifdef NET_R_SETANSWER
       int n = 0;

       if (ne == NULL || (n = copy_netent(ne, nptr, NET_R_COPY)) != 0)
               *answerp = NULL;
       else
               *answerp = ne;
       if (ne == NULL)
               *h_errnop = h_errno;
       return (n);
#else

       if (ne == NULL)
               return (NET_R_BAD);

       return (copy_netent(ne, nptr, NET_R_COPY));
#endif
}

NET_R_SET_RETURN
#ifdef NET_R_ENT_ARGS
setnetent_r(int stay_open, NET_R_ENT_ARGS)
#else
setnetent_r(int stay_open)
#endif
{
#ifdef NET_R_ENT_ARGS
       UNUSED(ndptr);
#endif
       setnetent(stay_open);
#ifdef NET_R_SET_RESULT
       return (NET_R_SET_RESULT);
#endif
}

NET_R_END_RETURN
#ifdef NET_R_ENT_ARGS
endnetent_r(NET_R_ENT_ARGS)
#else
endnetent_r()
#endif
{
#ifdef NET_R_ENT_ARGS
       UNUSED(ndptr);
#endif
       endnetent();
       NET_R_END_RESULT(NET_R_OK);
}

/* Private */

#ifndef NETENT_DATA
static NET_R_RETURN
copy_netent(struct netent *ne, struct netent *nptr, NET_R_COPY_ARGS) {
       char *cp;
       int i, n;
       int numptr, len;

       /* Find out the amount of space required to store the answer. */
       numptr = 1; /*%< NULL ptr */
       len = (char *)ALIGN(buf) - buf;
       for (i = 0; ne->n_aliases[i]; i++, numptr++) {
               len += strlen(ne->n_aliases[i]) + 1;
       }
       len += strlen(ne->n_name) + 1;
       len += numptr * sizeof(char*);

       if (len > (int)buflen) {
               errno = ERANGE;
               return (NET_R_BAD);
       }

       /* copy net value and type */
       nptr->n_addrtype = ne->n_addrtype;
       nptr->n_net = ne->n_net;

       cp = (char *)ALIGN(buf) + numptr * sizeof(char *);

       /* copy official name */
       n = strlen(ne->n_name) + 1;
       strcpy(cp, ne->n_name);
       nptr->n_name = cp;
       cp += n;

       /* copy aliases */
       nptr->n_aliases = (char **)ALIGN(buf);
       for (i = 0 ; ne->n_aliases[i]; i++) {
               n = strlen(ne->n_aliases[i]) + 1;
               strcpy(cp, ne->n_aliases[i]);
               nptr->n_aliases[i] = cp;
               cp += n;
       }
       nptr->n_aliases[i] = NULL;

       return (NET_R_OK);
}
#else /* !NETENT_DATA */
static int
copy_netent(struct netent *ne, struct netent *nptr, NET_R_COPY_ARGS) {
       char *cp, *eob;
       int i, n;

       /* copy net value and type */
       nptr->n_addrtype = ne->n_addrtype;
       nptr->n_net = ne->n_net;

       /* copy official name */
       cp = ndptr->line;
       eob = ndptr->line + sizeof(ndptr->line);
       if ((n = strlen(ne->n_name) + 1) < (eob - cp)) {
               strcpy(cp, ne->n_name);
               nptr->n_name = cp;
               cp += n;
       } else {
               return (-1);
       }

       /* copy aliases */
       i = 0;
       nptr->n_aliases = ndptr->net_aliases;
       while (ne->n_aliases[i] && i < (_MAXALIASES-1)) {
               if ((n = strlen(ne->n_aliases[i]) + 1) < (eob - cp)) {
                       strcpy(cp, ne->n_aliases[i]);
                       nptr->n_aliases[i] = cp;
                       cp += n;
               } else {
                       break;
               }
               i++;
       }
       nptr->n_aliases[i] = NULL;

       return (NET_R_OK);
}
#endif /* !NETENT_DATA */
#else /* NET_R_RETURN */
       static int getnetent_r_unknown_system = 0;
#endif /* NET_R_RETURN */
#endif /* !defined(_REENTRANT) || !defined(DO_PTHREADS) */
/*! \file */

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