160 lines
3.9 KiB
C
160 lines
3.9 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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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#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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#endif /* LIBC_SCCS and not lint */
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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 <netdb.h>
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#include <stdio.h>
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#include <string.h>
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#define MAXALIASES 35
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static FILE *netf;
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static char line[BUFSIZ+1];
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static struct netent net;
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static char *net_aliases[MAXALIASES];
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static int _net_stayopen;
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void
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_setnethtent(f)
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int f;
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{
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if (netf == NULL)
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netf = fopen(_PATH_NETWORKS, "r" );
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else
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rewind(netf);
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_net_stayopen |= f;
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}
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void
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_endnethtent()
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{
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if (netf) {
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fclose(netf);
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netf = NULL;
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}
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_net_stayopen = 0;
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}
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struct netent *
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getnetent()
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{
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char *p;
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register char *cp, **q;
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if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL)
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return (NULL);
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again:
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p = fgets(line, BUFSIZ, netf);
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if (p == NULL)
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return (NULL);
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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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goto again;
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*cp = '\0';
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net.n_name = p;
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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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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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net.n_net = inet_network(cp);
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net.n_addrtype = AF_INET;
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q = net.n_aliases = 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 < &net_aliases[MAXALIASES - 1])
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*q++ = cp;
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cp = strpbrk(cp, " \t");
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if (cp != NULL)
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*cp++ = '\0';
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}
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*q = NULL;
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return (&net);
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}
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struct netent *
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_getnetbyhtname(name)
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register const char *name;
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{
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register struct netent *p;
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register char **cp;
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setnetent(_net_stayopen);
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while ((p = getnetent())) {
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if (strcasecmp(p->n_name, name) == 0)
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break;
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for (cp = p->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 (!_net_stayopen)
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endnetent();
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return (p);
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}
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struct netent *
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_getnetbyhtaddr(net, type)
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register long net;
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register int type;
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{
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register struct netent *p;
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setnetent(_net_stayopen);
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while ((p = getnetent()))
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if (p->n_addrtype == type && p->n_net == net)
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break;
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if (!_net_stayopen)
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endnetent();
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return (p);
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}
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