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281 lines
6.9 KiB
C
281 lines
6.9 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* Portions Copyright (c) 1993 Carlos Leandro and Rui Salgueiro
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* Dep. Matematica Universidade de Coimbra, Portugal, Europe
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* from getnetent.c 1.1 (Coimbra) 93/06/02
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)getnetent.c 8.1 (Berkeley) 6/4/93";
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static char orig_rcsid[] = "From: Id: getnetent.c,v 8.4 1997/06/01 20:34:37 vixie Exp";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <arpa/nameser.h>
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#include <netdb.h>
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#include <resolv.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include <nsswitch.h>
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#include "netdb_private.h"
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void
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_setnethtent(int f, struct netent_data *ned)
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{
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if (ned->netf == NULL)
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ned->netf = fopen(_PATH_NETWORKS, "r");
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else
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rewind(ned->netf);
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ned->stayopen |= f;
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}
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void
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_endnethtent(struct netent_data *ned)
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{
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if (ned->netf) {
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fclose(ned->netf);
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ned->netf = NULL;
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}
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ned->stayopen = 0;
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}
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static int
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getnetent_p(struct netent *ne, struct netent_data *ned)
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{
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char *p, *bp, *ep;
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char *cp, **q;
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int len;
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char line[BUFSIZ + 1];
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if (ned->netf == NULL &&
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(ned->netf = fopen(_PATH_NETWORKS, "r")) == NULL)
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return (-1);
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again:
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p = fgets(line, sizeof line, ned->netf);
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if (p == NULL)
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return (-1);
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if (*p == '#')
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goto again;
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cp = strpbrk(p, "#\n");
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if (cp != NULL)
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*cp = '\0';
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bp = ned->netbuf;
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ep = ned->netbuf + sizeof ned->netbuf;
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ne->n_name = bp;
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cp = strpbrk(p, " \t");
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if (cp == NULL)
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goto again;
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*cp++ = '\0';
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len = strlen(p) + 1;
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if (ep - bp < len) {
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RES_SET_H_ERRNO(__res_state(), NO_RECOVERY);
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return (-1);
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}
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strlcpy(bp, p, ep - bp);
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bp += len;
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while (*cp == ' ' || *cp == '\t')
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cp++;
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p = strpbrk(cp, " \t");
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if (p != NULL)
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*p++ = '\0';
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ne->n_net = inet_network(cp);
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ne->n_addrtype = AF_INET;
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q = ne->n_aliases = ned->net_aliases;
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if (p != NULL) {
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cp = p;
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while (cp && *cp) {
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if (*cp == ' ' || *cp == '\t') {
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cp++;
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continue;
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}
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if (q >= &ned->net_aliases[_MAXALIASES - 1])
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break;
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p = strpbrk(cp, " \t");
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if (p != NULL)
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*p++ = '\0';
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len = strlen(cp) + 1;
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if (ep - bp < len)
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break;
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strlcpy(bp, cp, ep - bp);
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*q++ = bp;
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bp += len;
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cp = p;
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}
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}
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*q = NULL;
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return (0);
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}
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int
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getnetent_r(struct netent *nptr, char *buffer, size_t buflen,
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struct netent **result, int *h_errnop)
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{
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struct netent_data *ned;
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struct netent ne;
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res_state statp;
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statp = __res_state();
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if ((ned = __netent_data_init()) == NULL) {
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RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
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*h_errnop = statp->res_h_errno;
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return (-1);
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}
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if (getnetent_p(&ne, ned) != 0)
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return (-1);
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if (__copy_netent(&ne, nptr, buffer, buflen) != 0)
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return (-1);
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*result = nptr;
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return (0);
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}
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struct netent *
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getnetent(void)
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{
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struct netdata *nd;
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struct netent *rval;
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int ret_h_errno;
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if ((nd = __netdata_init()) == NULL)
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return (NULL);
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if (getnetent_r(&nd->net, nd->data, sizeof(nd->data), &rval,
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&ret_h_errno) != 0)
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return (NULL);
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return (rval);
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}
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int
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_ht_getnetbyname(void *rval, void *cb_data, va_list ap)
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{
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const char *name;
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char *buffer;
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size_t buflen;
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int *errnop, *h_errnop;
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struct netent *nptr, ne;
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struct netent_data *ned;
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char **cp;
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res_state statp;
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int error;
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name = va_arg(ap, const char *);
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nptr = va_arg(ap, struct netent *);
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buffer = va_arg(ap, char *);
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buflen = va_arg(ap, size_t);
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errnop = va_arg(ap, int *);
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h_errnop = va_arg(ap, int *);
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statp = __res_state();
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if ((ned = __netent_data_init()) == NULL) {
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RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
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*h_errnop = statp->res_h_errno;
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return (NS_UNAVAIL);
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}
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_setnethtent(ned->stayopen, ned);
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while ((error = getnetent_p(&ne, ned)) == 0) {
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if (strcasecmp(ne.n_name, name) == 0)
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break;
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for (cp = ne.n_aliases; *cp != 0; cp++)
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if (strcasecmp(*cp, name) == 0)
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goto found;
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}
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found:
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if (!ned->stayopen)
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_endnethtent(ned);
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if (error != 0) {
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*h_errnop = statp->res_h_errno;
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return (NS_NOTFOUND);
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}
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if (__copy_netent(&ne, nptr, buffer, buflen) != 0) {
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*h_errnop = statp->res_h_errno;
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return (NS_NOTFOUND);
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}
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*((struct netent **)rval) = nptr;
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return (NS_SUCCESS);
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}
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int
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_ht_getnetbyaddr(void *rval, void *cb_data, va_list ap)
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{
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uint32_t net;
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int type;
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char *buffer;
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size_t buflen;
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int *errnop, *h_errnop;
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struct netent *nptr, ne;
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struct netent_data *ned;
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res_state statp;
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int error;
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net = va_arg(ap, uint32_t);
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type = va_arg(ap, int);
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nptr = va_arg(ap, struct netent *);
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buffer = va_arg(ap, char *);
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buflen = va_arg(ap, size_t);
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errnop = va_arg(ap, int *);
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h_errnop = va_arg(ap, int *);
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statp = __res_state();
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if ((ned = __netent_data_init()) == NULL) {
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RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
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*h_errnop = statp->res_h_errno;
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return (NS_UNAVAIL);
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}
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_setnethtent(ned->stayopen, ned);
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while ((error = getnetent_p(&ne, ned)) == 0)
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if (ne.n_addrtype == type && ne.n_net == net)
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break;
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if (!ned->stayopen)
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_endnethtent(ned);
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if (error != 0) {
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*h_errnop = statp->res_h_errno;
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return (NS_NOTFOUND);
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}
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if (__copy_netent(&ne, nptr, buffer, buflen) != 0) {
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*h_errnop = statp->res_h_errno;
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return (NS_NOTFOUND);
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}
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*((struct netent **)rval) = nptr;
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return (NS_SUCCESS);
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}
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