Fix a bug about the iSCSI DHCP dependency issue.

[mirror_edk2.git] / StdLib / BsdSocketLib / getnetbynis.c

/*-\r
 * Copyright (c) 1994, Garrett Wollman\r
 *\r
 * Redistribution and use in source and binary forms, with or without\r
 * modification, are permitted provided that the following conditions\r
 * are met:\r
 * 1. Redistributions of source code must retain the above copyright\r
 *    notice, this list of conditions and the following disclaimer.\r
 * 2. Redistributions in binary form must reproduce the above copyright\r
 *    notice, this list of conditions and the following disclaimer in the\r
 *    documentation and/or other materials provided with the distribution.\r
 *\r
 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND\r
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
 * SUCH DAMAGE.\r
 */\r
\r
#if defined(LIBC_SCCS) && !defined(lint)\r
static char sccsid[] = "@(#)$Id: getnetbynis.c,v 1.1.1.1 2003/11/19 01:51:28 kyu3 Exp $";\r
static char rcsid[] = "$Id: getnetbynis.c,v 1.1.1.1 2003/11/19 01:51:28 kyu3 Exp $";\r
#endif /* LIBC_SCCS and not lint */\r
\r
#include <sys/param.h>\r
#include <sys/socket.h>\r
#include <netinet/in.h>\r
#include <arpa/inet.h>\r
#include <netdb.h>\r
#include <stdio.h>\r
#include <stdlib.h>\r
#include <ctype.h>\r
#include <errno.h>\r
#include <string.h>\r
#include <arpa/nameser.h>\r
#ifdef YP\r
#include <rpc/rpc.h>\r
#include <rpcsvc/yp_prot.h>\r
#include <rpcsvc/ypclnt.h>\r
#endif\r
\r
#define	MAXALIASES	35\r
#define	MAXADDRS	35\r
\r
#ifdef YP\r
static char *host_aliases[MAXALIASES];\r
#endif /* YP */\r
\r
static struct netent *\r
_getnetbynis(const char *name, char *map, int af)\r
{\r
#ifdef YP\r
	register char *cp, **q;\r
	static char *result;\r
	int resultlen;\r
	static struct netent h;\r
	static char *domain = (char *)NULL;\r
	static char ypbuf[YPMAXRECORD + 2];\r
\r
	switch(af) {\r
	case AF_INET:\r
		break;\r
	default:\r
	case AF_INET6:\r
		errno = EAFNOSUPPORT;\r
		return NULL;\r
	}\r
\r
	if (domain == (char *)NULL)\r
		if (yp_get_default_domain (&domain))\r
			return (NULL);\r
\r
	if (yp_match(domain, map, name, strlen(name), &result, &resultlen))\r
		return (NULL);\r
\r
	bcopy((char *)result, (char *)&ypbuf, resultlen);\r
	ypbuf[resultlen] = '\0';\r
	free(result);\r
	result = (char *)&ypbuf;\r
\r
	if ((cp = index(result, '\n')))\r
		*cp = '\0';\r
\r
	cp = strpbrk(result, " \t");\r
	*cp++ = '\0';\r
	h.n_name = result;\r
\r
	while (*cp == ' ' || *cp == '\t')\r
		cp++;\r
\r
	h.n_net = inet_network(cp);\r
	h.n_addrtype = AF_INET;\r
\r
	q = h.n_aliases = host_aliases;\r
	cp = strpbrk(cp, " \t");\r
	if (cp != NULL)\r
		*cp++ = '\0';\r
	while (cp && *cp) {\r
		if (*cp == ' ' || *cp == '\t') {\r
			cp++;\r
			continue;\r
		}\r
		if (q < &host_aliases[MAXALIASES - 1])\r
			*q++ = cp;\r
		cp = strpbrk(cp, " \t");\r
		if (cp != NULL)\r
			*cp++ = '\0';\r
	}\r
	*q = NULL;\r
	return (&h);\r
#else\r
	return (NULL);\r
#endif\r
}\r
\r
struct netent *\r
_getnetbynisname(const char *name)\r
{\r
	return _getnetbynis(name, "networks.byname", AF_INET);\r
}\r
\r
struct netent *\r
_getnetbynisaddr(unsigned long addr, int af)\r
{\r
	char *str, *cp;\r
	unsigned long net2;\r
	int nn;\r
	unsigned int netbr[4];\r
	char buf[MAXDNAME];\r
\r
	if (af != AF_INET) {\r
		errno = EAFNOSUPPORT;\r
		return (NULL);\r
	}\r
\r
        for (nn = 4, net2 = addr; net2; net2 >>= 8) {\r
                netbr[--nn] = net2 & 0xff;\r
	}\r
\r
	switch (nn) {\r
	case 3:		/* Class A */\r
		sprintf(buf, "%u", netbr[3]);\r
		break;\r
        case 2:		/* Class B */\r
		sprintf(buf, "%u.%u", netbr[2], netbr[3]);\r
		break;\r
        case 1:		/* Class C */\r
		sprintf(buf, "%u.%u.%u", netbr[1], netbr[2], netbr[3]);\r
                break;\r
        case 0:		/* Class D - E */\r
		sprintf(buf, "%u.%u.%u.%u", netbr[0], netbr[1],\r
			netbr[2], netbr[3]);\r
		break;\r
	}\r
\r
	str = (char *)&buf;\r
	cp = str + (strlen(str) - 2);\r
\r
	while(!strcmp(cp, ".0")) {\r
		*cp = '\0';\r
		cp = str + (strlen(str) - 2);\r
	}\r
\r
	return _getnetbynis(str, "networks.byaddr", af);\r
}\r