d915a14ef0
Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
300 lines
6.9 KiB
C
300 lines
6.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 <arpa/nameser.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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#include <stdarg.h>
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#include <nsswitch.h>
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#include <resolv.h> /* XXX */
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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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#include "netdb_private.h"
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#ifdef YP
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static int
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_gethostbynis(const char *name, char *map, int af, struct hostent *he,
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struct hostent_data *hed)
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{
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char *p, *bp, *ep;
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char *cp, **q;
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char *result;
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int resultlen, size, addrok = 0;
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char ypbuf[YPMAXRECORD + 2];
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res_state statp;
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statp = __res_state();
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switch(af) {
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case AF_INET:
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size = NS_INADDRSZ;
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break;
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case AF_INET6:
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size = NS_IN6ADDRSZ;
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break;
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default:
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errno = EAFNOSUPPORT;
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RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
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return (-1);
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}
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if (hed->yp_domain == (char *)NULL)
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if (yp_get_default_domain (&hed->yp_domain)) {
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RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
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return (-1);
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}
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if (yp_match(hed->yp_domain, map, name, strlen(name), &result,
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&resultlen)) {
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RES_SET_H_ERRNO(statp, HOST_NOT_FOUND);
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return (-1);
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}
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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 = strchr(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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he->h_addr_list = hed->h_addr_ptrs;
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he->h_addr = (char *)hed->host_addr;
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switch (af) {
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case AF_INET:
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addrok = inet_aton(result, (struct in_addr *)hed->host_addr);
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if (addrok != 1)
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break;
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if (statp->options & RES_USE_INET6) {
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_map_v4v6_address((char *)hed->host_addr,
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(char *)hed->host_addr);
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af = AF_INET6;
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size = NS_IN6ADDRSZ;
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}
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break;
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case AF_INET6:
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addrok = inet_pton(af, result, hed->host_addr);
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break;
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}
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if (addrok != 1) {
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RES_SET_H_ERRNO(statp, HOST_NOT_FOUND);
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return (-1);
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}
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he->h_addr_list[1] = NULL;
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he->h_length = size;
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he->h_addrtype = af;
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while (*cp == ' ' || *cp == '\t')
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cp++;
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bp = hed->hostbuf;
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ep = hed->hostbuf + sizeof hed->hostbuf;
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he->h_name = bp;
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q = he->h_aliases = hed->host_aliases;
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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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size = strlen(cp) + 1;
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if (ep - bp < size) {
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RES_SET_H_ERRNO(statp, NO_RECOVERY);
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return (-1);
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}
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strlcpy(bp, cp, ep - bp);
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bp += size;
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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 >= &hed->host_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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size = strlen(cp) + 1;
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if (ep - bp < size)
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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 += size;
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cp = p;
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}
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*q = NULL;
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return (0);
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}
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static int
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_gethostbynisname_r(const char *name, int af, struct hostent *he,
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struct hostent_data *hed)
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{
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char *map;
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switch (af) {
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case AF_INET:
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map = "hosts.byname";
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break;
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default:
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map = "ipnodes.byname";
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break;
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}
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return (_gethostbynis(name, map, af, he, hed));
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}
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static int
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_gethostbynisaddr_r(const void *addr, socklen_t len, int af,
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struct hostent *he, struct hostent_data *hed)
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{
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char *map;
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char numaddr[46];
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switch (af) {
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case AF_INET:
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map = "hosts.byaddr";
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break;
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default:
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map = "ipnodes.byaddr";
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break;
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}
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if (inet_ntop(af, addr, numaddr, sizeof(numaddr)) == NULL)
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return (-1);
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return (_gethostbynis(numaddr, map, af, he, hed));
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}
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#endif /* YP */
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int
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_nis_gethostbyname(void *rval, void *cb_data, va_list ap)
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{
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#ifdef YP
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const char *name;
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int af;
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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 hostent *hptr, he;
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struct hostent_data *hed;
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res_state statp;
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name = va_arg(ap, const char *);
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af = va_arg(ap, int);
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hptr = va_arg(ap, struct hostent *);
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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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*((struct hostent **)rval) = NULL;
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statp = __res_state();
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if ((hed = __hostent_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_NOTFOUND);
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}
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if (_gethostbynisname_r(name, af, &he, hed) != 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_hostent(&he, hptr, buffer, buflen) != 0) {
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*errnop = errno;
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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_RETURN);
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}
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*((struct hostent **)rval) = hptr;
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return (NS_SUCCESS);
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#else
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*((struct hostent **)rval) = NULL;
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return (NS_UNAVAIL);
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#endif
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}
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int
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_nis_gethostbyaddr(void *rval, void *cb_data, va_list ap)
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{
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#ifdef YP
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const void *addr;
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socklen_t len;
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int af;
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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 hostent *hptr, he;
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struct hostent_data *hed;
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res_state statp;
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addr = va_arg(ap, const void *);
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len = va_arg(ap, socklen_t);
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af = va_arg(ap, int);
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hptr = va_arg(ap, struct hostent *);
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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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*((struct hostent **)rval) = NULL;
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statp = __res_state();
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if ((hed = __hostent_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_NOTFOUND);
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}
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if (_gethostbynisaddr_r(addr, len, af, &he, hed) != 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_hostent(&he, hptr, buffer, buflen) != 0) {
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*errnop = errno;
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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_RETURN);
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}
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*((struct hostent **)rval) = hptr;
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return (NS_SUCCESS);
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#else
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*((struct hostent **)rval) = NULL;
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return (NS_UNAVAIL);
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#endif
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}
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