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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libnetworking/] [libc/] [gethostbynis.c] - Blame information for rev 173

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1 30 unneback
/*-
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 * Copyright (c) 1994, Garrett Wollman
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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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 *
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 * THIS SOFTWARE IS PROVIDED BY THE 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[] = "@(#)$Id: gethostbynis.c,v 1.2 2001-09-27 12:01:53 chris Exp $";
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static char rcsid[] = "$Id: gethostbynis.c,v 1.2 2001-09-27 12:01:53 chris Exp $";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/param.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 <stdlib.h>
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#include <ctype.h>
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#include <errno.h>
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#include <string.h>
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#ifdef YP
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#include <rpc/rpc.h>
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#include <rpcsvc/yp_prot.h>
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#include <rpcsvc/ypclnt.h>
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#endif
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#define MAXALIASES      35
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#define MAXADDRS        35
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#ifdef YP
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static char *host_aliases[MAXALIASES];
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static char hostaddr[MAXADDRS];
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static char *host_addrs[2];
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#endif /* YP */
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static struct hostent *
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_gethostbynis(name, map, af)
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        const char *name;
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        char *map;
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        int af;
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{
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#ifdef YP
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        register char *cp, **q;
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        char *result;
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        int resultlen;
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        static struct hostent h;
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        static char *domain = (char *)NULL;
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        static char ypbuf[YPMAXRECORD + 2];
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        switch(af) {
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        case AF_INET:
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                break;
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        default:
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        case AF_INET6:
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                errno = EAFNOSUPPORT;
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                return NULL;
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        }
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        if (domain == (char *)NULL)
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                if (yp_get_default_domain (&domain))
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                        return ((struct hostent *)NULL);
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        if (yp_match(domain, map, name, strlen(name), &result, &resultlen))
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                return ((struct hostent *)NULL);
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        /* avoid potential memory leak */
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        bcopy((char *)result, (char *)&ypbuf, resultlen);
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        ypbuf[resultlen] = '\0';
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        free(result);
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        result = (char *)&ypbuf;
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        if ((cp = index(result, '\n')))
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                *cp = '\0';
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        cp = strpbrk(result, " \t");
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        *cp++ = '\0';
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        h.h_addr_list = host_addrs;
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        h.h_addr = hostaddr;
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        *((u_long *)h.h_addr) = inet_addr(result);
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        h.h_length = sizeof(u_long);
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        h.h_addrtype = AF_INET;
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        while (*cp == ' ' || *cp == '\t')
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                cp++;
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        h.h_name = cp;
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        q = h.h_aliases = host_aliases;
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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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        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 < &host_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 (&h);
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#else
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        return (NULL);
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#endif /* YP */
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}
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struct hostent *
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_gethostbynisname(name, af)
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        const char *name;
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        int af;
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{
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        return _gethostbynis(name, "hosts.byname", af);
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}
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struct hostent *
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_gethostbynisaddr(addr, len, af)
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        const char *addr;
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        int len;
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        int af;
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{
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        return _gethostbynis(inet_ntoa(*(struct in_addr *)addr),"hosts.byaddr", af);
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}

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