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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libnetworking/] [libc/] [getnetbynis.c] - Rev 773
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/*- * Copyright (c) 1994, Garrett Wollman * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)$Id: getnetbynis.c,v 1.2 2001-09-27 12:01:53 chris Exp $"; static char rcsid[] = "$Id: getnetbynis.c,v 1.2 2001-09-27 12:01:53 chris Exp $"; #endif /* LIBC_SCCS and not lint */ #include <sys/param.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <netdb.h> #include <stdio.h> #include <stdlib.h> #include <ctype.h> #include <errno.h> #include <string.h> #include <arpa/nameser.h> #ifdef YP #include <rpc/rpc.h> #include <rpcsvc/yp_prot.h> #include <rpcsvc/ypclnt.h> #endif #define MAXALIASES 35 #define MAXADDRS 35 #ifdef YP static char *host_aliases[MAXALIASES]; #endif /* YP */ static struct netent * _getnetbynis(name, map, af) const char *name; char *map; int af; { #ifdef YP register char *cp, **q; static char *result; int resultlen; static struct netent h; static char *domain = (char *)NULL; static char ypbuf[YPMAXRECORD + 2]; switch(af) { case AF_INET: break; default: case AF_INET6: errno = EAFNOSUPPORT; return NULL; } if (domain == (char *)NULL) if (yp_get_default_domain (&domain)) return (NULL); if (yp_match(domain, map, name, strlen(name), &result, &resultlen)) return (NULL); bcopy((char *)result, (char *)&ypbuf, resultlen); ypbuf[resultlen] = '\0'; free(result); result = (char *)&ypbuf; if ((cp = index(result, '\n'))) *cp = '\0'; cp = strpbrk(result, " \t"); *cp++ = '\0'; h.n_name = result; while (*cp == ' ' || *cp == '\t') cp++; h.n_net = inet_network(cp); h.n_addrtype = AF_INET; q = h.n_aliases = host_aliases; cp = strpbrk(cp, " \t"); if (cp != NULL) *cp++ = '\0'; while (cp && *cp) { if (*cp == ' ' || *cp == '\t') { cp++; continue; } if (q < &host_aliases[MAXALIASES - 1]) *q++ = cp; cp = strpbrk(cp, " \t"); if (cp != NULL) *cp++ = '\0'; } *q = NULL; return (&h); #else return (NULL); #endif } struct netent * _getnetbynisname(name) const char *name; { return _getnetbynis(name, "networks.byname", AF_INET); } struct netent * _getnetbynisaddr(addr, af) unsigned long addr; int af; { char *str, *cp; unsigned long net2; int nn; unsigned int netbr[4]; char buf[MAXDNAME]; if (af != AF_INET) { errno = EAFNOSUPPORT; return (NULL); } for (nn = 4, net2 = addr; net2; net2 >>= 8) { netbr[--nn] = net2 & 0xff; } switch (nn) { case 3: /* Class A */ sprintf(buf, "%u", netbr[3]); break; case 2: /* Class B */ sprintf(buf, "%u.%u", netbr[2], netbr[3]); break; case 1: /* Class C */ sprintf(buf, "%u.%u.%u", netbr[1], netbr[2], netbr[3]); break; case 0: /* Class D - E */ sprintf(buf, "%u.%u.%u.%u", netbr[0], netbr[1], netbr[2], netbr[3]); break; } str = (char *)&buf; cp = str + (strlen(str) - 2); while(!strcmp(cp, ".0")) { *cp = '\0'; cp = str + (strlen(str) - 2); } return _getnetbynis(str, "networks.byaddr", af); }
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