[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/libc/glibc/glibc-2.22/resolv/gethnamaddr.c b/ap/libc/glibc/glibc-2.22/resolv/gethnamaddr.c
new file mode 100644
index 0000000..7fd0e49
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.22/resolv/gethnamaddr.c
@@ -0,0 +1,1070 @@
+/*
+ * ++Copyright++ 1985, 1988, 1993
+ * -
+ * Copyright (c) 1985, 1988, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * 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.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND 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.
+ * -
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ * -
+ * --Copyright--
+ */
+
+/* XXX This file is not used by any of the resolver functions implemented by
+ glibc (i.e. get*info and gethostby*). It cannot be removed however because
+ it exports symbols in the libresolv ABI. The file is not maintained any
+ more, nor are these functions. */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+
+#include <stdio.h>
+#include <netdb.h>
+#include <resolv.h>
+#include <ctype.h>
+#include <errno.h>
+#include <syslog.h>
+
+#define RESOLVSORT
+
+#ifndef LOG_AUTH
+# define LOG_AUTH 0
+#endif
+
+#define MULTI_PTRS_ARE_ALIASES 1 /* XXX - experimental */
+
+#if defined(BSD) && (BSD >= 199103) && defined(AF_INET6)
+# include <stdlib.h>
+# include <string.h>
+#else
+# include "../conf/portability.h"
+#endif
+
+#if defined(USE_OPTIONS_H)
+# include <../conf/options.h>
+#endif
+
+#ifdef SPRINTF_CHAR
+# define SPRINTF(x) strlen(sprintf/**/x)
+#else
+# define SPRINTF(x) ((size_t)sprintf x)
+#endif
+
+#define MAXALIASES 35
+#define MAXADDRS 35
+
+static const char AskedForGot[] =
+ "gethostby*.getanswer: asked for \"%s\", got \"%s\"";
+
+static char *h_addr_ptrs[MAXADDRS + 1];
+
+static struct hostent host;
+static char *host_aliases[MAXALIASES];
+static char hostbuf[8*1024];
+static u_char host_addr[16]; /* IPv4 or IPv6 */
+static FILE *hostf = NULL;
+static int stayopen = 0;
+
+static void map_v4v6_address (const char *src, char *dst) __THROW;
+static void map_v4v6_hostent (struct hostent *hp, char **bp, int *len) __THROW;
+
+#ifdef RESOLVSORT
+extern void addrsort (char **, int) __THROW;
+#endif
+
+#if PACKETSZ > 65536
+#define MAXPACKET PACKETSZ
+#else
+#define MAXPACKET 65536
+#endif
+
+/* As per RFC 1034 and 1035 a host name cannot exceed 255 octets in length. */
+#ifdef MAXHOSTNAMELEN
+# undef MAXHOSTNAMELEN
+#endif
+#define MAXHOSTNAMELEN 256
+
+typedef union {
+ HEADER hdr;
+ u_char buf[MAXPACKET];
+} querybuf;
+
+typedef union {
+ int32_t al;
+ char ac;
+} align;
+
+#ifndef h_errno
+extern int h_errno;
+#endif
+
+#ifdef DEBUG
+static void
+Dprintf(msg, num)
+ char *msg;
+ int num;
+{
+ if (_res.options & RES_DEBUG) {
+ int save = errno;
+
+ printf(msg, num);
+ __set_errno (save);
+ }
+}
+#else
+# define Dprintf(msg, num) /*nada*/
+#endif
+
+#define BOUNDED_INCR(x) \
+ do { \
+ cp += x; \
+ if (cp > eom) { \
+ __set_h_errno (NO_RECOVERY); \
+ return (NULL); \
+ } \
+ } while (0)
+
+#define BOUNDS_CHECK(ptr, count) \
+ do { \
+ if ((ptr) + (count) > eom) { \
+ __set_h_errno (NO_RECOVERY); \
+ return (NULL); \
+ } \
+ } while (0)
+
+
+static struct hostent *
+getanswer (const querybuf *answer, int anslen, const char *qname, int qtype)
+{
+ const HEADER *hp;
+ const u_char *cp;
+ int n;
+ const u_char *eom, *erdata;
+ char *bp, **ap, **hap;
+ int type, class, buflen, ancount, qdcount;
+ int haveanswer, had_error;
+ int toobig = 0;
+ char tbuf[MAXDNAME];
+ const char *tname;
+ int (*name_ok) (const char *);
+
+ tname = qname;
+ host.h_name = NULL;
+ eom = answer->buf + anslen;
+ switch (qtype) {
+ case T_A:
+ case T_AAAA:
+ name_ok = res_hnok;
+ break;
+ case T_PTR:
+ name_ok = res_dnok;
+ break;
+ default:
+ return (NULL); /* XXX should be abort(); */
+ }
+ /*
+ * find first satisfactory answer
+ */
+ hp = &answer->hdr;
+ ancount = ntohs(hp->ancount);
+ qdcount = ntohs(hp->qdcount);
+ bp = hostbuf;
+ buflen = sizeof hostbuf;
+ cp = answer->buf;
+ BOUNDED_INCR(HFIXEDSZ);
+ if (qdcount != 1) {
+ __set_h_errno (NO_RECOVERY);
+ return (NULL);
+ }
+ n = dn_expand(answer->buf, eom, cp, bp, buflen);
+ if ((n < 0) || !(*name_ok)(bp)) {
+ __set_h_errno (NO_RECOVERY);
+ return (NULL);
+ }
+ BOUNDED_INCR(n + QFIXEDSZ);
+ if (qtype == T_A || qtype == T_AAAA) {
+ /* res_send() has already verified that the query name is the
+ * same as the one we sent; this just gets the expanded name
+ * (i.e., with the succeeding search-domain tacked on).
+ */
+ n = strlen(bp) + 1; /* for the \0 */
+ if (n >= MAXHOSTNAMELEN) {
+ __set_h_errno (NO_RECOVERY);
+ return (NULL);
+ }
+ host.h_name = bp;
+ bp += n;
+ buflen -= n;
+ /* The qname can be abbreviated, but h_name is now absolute. */
+ qname = host.h_name;
+ }
+ ap = host_aliases;
+ *ap = NULL;
+ host.h_aliases = host_aliases;
+ hap = h_addr_ptrs;
+ *hap = NULL;
+ host.h_addr_list = h_addr_ptrs;
+ haveanswer = 0;
+ had_error = 0;
+ while (ancount-- > 0 && cp < eom && !had_error) {
+ n = dn_expand(answer->buf, eom, cp, bp, buflen);
+ if ((n < 0) || !(*name_ok)(bp)) {
+ had_error++;
+ continue;
+ }
+ cp += n; /* name */
+ BOUNDS_CHECK(cp, 3 * INT16SZ + INT32SZ);
+ type = ns_get16(cp);
+ cp += INT16SZ; /* type */
+ class = ns_get16(cp);
+ cp += INT16SZ + INT32SZ; /* class, TTL */
+ n = ns_get16(cp);
+ cp += INT16SZ; /* len */
+ BOUNDS_CHECK(cp, n);
+ erdata = cp + n;
+ if (class != C_IN) {
+ /* XXX - debug? syslog? */
+ cp += n;
+ continue; /* XXX - had_error++ ? */
+ }
+ if ((qtype == T_A || qtype == T_AAAA) && type == T_CNAME) {
+ if (ap >= &host_aliases[MAXALIASES-1])
+ continue;
+ n = dn_expand(answer->buf, eom, cp, tbuf, sizeof tbuf);
+ if ((n < 0) || !(*name_ok)(tbuf)) {
+ had_error++;
+ continue;
+ }
+ cp += n;
+ if (cp != erdata) {
+ __set_h_errno (NO_RECOVERY);
+ return (NULL);
+ }
+ /* Store alias. */
+ *ap++ = bp;
+ n = strlen(bp) + 1; /* for the \0 */
+ if (n >= MAXHOSTNAMELEN) {
+ had_error++;
+ continue;
+ }
+ bp += n;
+ buflen -= n;
+ /* Get canonical name. */
+ n = strlen(tbuf) + 1; /* for the \0 */
+ if (n > buflen || n >= MAXHOSTNAMELEN) {
+ had_error++;
+ continue;
+ }
+ strcpy(bp, tbuf);
+ host.h_name = bp;
+ bp += n;
+ buflen -= n;
+ continue;
+ }
+ if (qtype == T_PTR && type == T_CNAME) {
+ n = dn_expand(answer->buf, eom, cp, tbuf, sizeof tbuf);
+ if (n < 0 || !res_dnok(tbuf)) {
+ had_error++;
+ continue;
+ }
+ cp += n;
+ if (cp != erdata) {
+ __set_h_errno (NO_RECOVERY);
+ return (NULL);
+ }
+ /* Get canonical name. */
+ n = strlen(tbuf) + 1; /* for the \0 */
+ if (n > buflen || n >= MAXHOSTNAMELEN) {
+ had_error++;
+ continue;
+ }
+ strcpy(bp, tbuf);
+ tname = bp;
+ bp += n;
+ buflen -= n;
+ continue;
+ }
+ if (type != qtype) {
+ /* Log a low priority message if we get an unexpected
+ * record, but skip it if we are using DNSSEC since it
+ * uses many different types in responses that do not
+ * match QTYPE.
+ */
+ if ((_res.options & RES_USE_DNSSEC) == 0) {
+ syslog(LOG_NOTICE|LOG_AUTH,
+ "gethostby*.getanswer: asked for \"%s %s %s\", got type \"%s\"",
+ qname, p_class(C_IN), p_type(qtype),
+ p_type(type));
+ }
+ cp += n;
+ continue; /* XXX - had_error++ ? */
+ }
+ switch (type) {
+ case T_PTR:
+ if (strcasecmp(tname, bp) != 0) {
+ syslog(LOG_NOTICE|LOG_AUTH,
+ AskedForGot, qname, bp);
+ cp += n;
+ continue; /* XXX - had_error++ ? */
+ }
+ n = dn_expand(answer->buf, eom, cp, bp, buflen);
+ if ((n < 0) || !res_hnok(bp)) {
+ had_error++;
+ break;
+ }
+#if MULTI_PTRS_ARE_ALIASES
+ cp += n;
+ if (cp != erdata) {
+ __set_h_errno (NO_RECOVERY);
+ return (NULL);
+ }
+ if (!haveanswer)
+ host.h_name = bp;
+ else if (ap < &host_aliases[MAXALIASES-1])
+ *ap++ = bp;
+ else
+ n = -1;
+ if (n != -1) {
+ n = strlen(bp) + 1; /* for the \0 */
+ if (n >= MAXHOSTNAMELEN) {
+ had_error++;
+ break;
+ }
+ bp += n;
+ buflen -= n;
+ }
+ break;
+#else
+ host.h_name = bp;
+ if (_res.options & RES_USE_INET6) {
+ n = strlen(bp) + 1; /* for the \0 */
+ if (n >= MAXHOSTNAMELEN) {
+ had_error++;
+ break;
+ }
+ bp += n;
+ buflen -= n;
+ map_v4v6_hostent(&host, &bp, &buflen);
+ }
+ __set_h_errno (NETDB_SUCCESS);
+ return (&host);
+#endif
+ case T_A:
+ case T_AAAA:
+ if (strcasecmp(host.h_name, bp) != 0) {
+ syslog(LOG_NOTICE|LOG_AUTH,
+ AskedForGot, host.h_name, bp);
+ cp += n;
+ continue; /* XXX - had_error++ ? */
+ }
+ if (n != host.h_length) {
+ cp += n;
+ continue;
+ }
+ if (!haveanswer) {
+ int nn;
+
+ host.h_name = bp;
+ nn = strlen(bp) + 1; /* for the \0 */
+ bp += nn;
+ buflen -= nn;
+ }
+
+ /* XXX: when incrementing bp, we have to decrement
+ * buflen by the same amount --okir */
+ buflen -= sizeof(align) - ((u_long)bp % sizeof(align));
+
+ bp += sizeof(align) - ((u_long)bp % sizeof(align));
+
+ if (bp + n >= &hostbuf[sizeof hostbuf]) {
+ Dprintf("size (%d) too big\n", n);
+ had_error++;
+ continue;
+ }
+ if (hap >= &h_addr_ptrs[MAXADDRS-1]) {
+ if (!toobig++) {
+ Dprintf("Too many addresses (%d)\n",
+ MAXADDRS);
+ }
+ cp += n;
+ continue;
+ }
+ memmove(*hap++ = bp, cp, n);
+ bp += n;
+ buflen -= n;
+ cp += n;
+ if (cp != erdata) {
+ __set_h_errno (NO_RECOVERY);
+ return (NULL);
+ }
+ break;
+ default:
+ abort();
+ }
+ if (!had_error)
+ haveanswer++;
+ }
+ if (haveanswer) {
+ *ap = NULL;
+ *hap = NULL;
+# if defined(RESOLVSORT)
+ /*
+ * Note: we sort even if host can take only one address
+ * in its return structures - should give it the "best"
+ * address in that case, not some random one
+ */
+ if (_res.nsort && haveanswer > 1 && qtype == T_A)
+ addrsort(h_addr_ptrs, haveanswer);
+# endif /*RESOLVSORT*/
+ if (!host.h_name) {
+ n = strlen(qname) + 1; /* for the \0 */
+ if (n > buflen || n >= MAXHOSTNAMELEN)
+ goto no_recovery;
+ strcpy(bp, qname);
+ host.h_name = bp;
+ bp += n;
+ buflen -= n;
+ }
+ if (_res.options & RES_USE_INET6)
+ map_v4v6_hostent(&host, &bp, &buflen);
+ __set_h_errno (NETDB_SUCCESS);
+ return (&host);
+ }
+ no_recovery:
+ __set_h_errno (NO_RECOVERY);
+ return (NULL);
+}
+
+extern struct hostent *gethostbyname2(const char *name, int af);
+libresolv_hidden_proto (gethostbyname2)
+
+struct hostent *
+gethostbyname(name)
+ const char *name;
+{
+ struct hostent *hp;
+
+ if (__res_maybe_init (&_res, 0) == -1) {
+ __set_h_errno (NETDB_INTERNAL);
+ return (NULL);
+ }
+ if (_res.options & RES_USE_INET6) {
+ hp = gethostbyname2(name, AF_INET6);
+ if (hp)
+ return (hp);
+ }
+ return (gethostbyname2(name, AF_INET));
+}
+
+struct hostent *
+gethostbyname2(name, af)
+ const char *name;
+ int af;
+{
+ union
+ {
+ querybuf *buf;
+ u_char *ptr;
+ } buf;
+ querybuf *origbuf;
+ const char *cp;
+ char *bp;
+ int n, size, type, len;
+ struct hostent *ret;
+
+ if (__res_maybe_init (&_res, 0) == -1) {
+ __set_h_errno (NETDB_INTERNAL);
+ return (NULL);
+ }
+
+ switch (af) {
+ case AF_INET:
+ size = INADDRSZ;
+ type = T_A;
+ break;
+ case AF_INET6:
+ size = IN6ADDRSZ;
+ type = T_AAAA;
+ break;
+ default:
+ __set_h_errno (NETDB_INTERNAL);
+ __set_errno (EAFNOSUPPORT);
+ return (NULL);
+ }
+
+ host.h_addrtype = af;
+ host.h_length = size;
+
+ /*
+ * if there aren't any dots, it could be a user-level alias.
+ * this is also done in res_query() since we are not the only
+ * function that looks up host names.
+ */
+ if (!strchr(name, '.') && (cp = __hostalias(name)))
+ name = cp;
+
+ /*
+ * disallow names consisting only of digits/dots, unless
+ * they end in a dot.
+ */
+ if (isdigit(name[0]))
+ for (cp = name;; ++cp) {
+ if (!*cp) {
+ if (*--cp == '.')
+ break;
+ /*
+ * All-numeric, no dot at the end.
+ * Fake up a hostent as if we'd actually
+ * done a lookup.
+ */
+ if (inet_pton(af, name, host_addr) <= 0) {
+ __set_h_errno (HOST_NOT_FOUND);
+ return (NULL);
+ }
+ strncpy(hostbuf, name, MAXDNAME);
+ hostbuf[MAXDNAME] = '\0';
+ bp = hostbuf + MAXDNAME;
+ len = sizeof hostbuf - MAXDNAME;
+ host.h_name = hostbuf;
+ host.h_aliases = host_aliases;
+ host_aliases[0] = NULL;
+ h_addr_ptrs[0] = (char *)host_addr;
+ h_addr_ptrs[1] = NULL;
+ host.h_addr_list = h_addr_ptrs;
+ if (_res.options & RES_USE_INET6)
+ map_v4v6_hostent(&host, &bp, &len);
+ __set_h_errno (NETDB_SUCCESS);
+ return (&host);
+ }
+ if (!isdigit(*cp) && *cp != '.')
+ break;
+ }
+ if ((isxdigit(name[0]) && strchr(name, ':') != NULL) ||
+ name[0] == ':')
+ for (cp = name;; ++cp) {
+ if (!*cp) {
+ if (*--cp == '.')
+ break;
+ /*
+ * All-IPv6-legal, no dot at the end.
+ * Fake up a hostent as if we'd actually
+ * done a lookup.
+ */
+ if (inet_pton(af, name, host_addr) <= 0) {
+ __set_h_errno (HOST_NOT_FOUND);
+ return (NULL);
+ }
+ strncpy(hostbuf, name, MAXDNAME);
+ hostbuf[MAXDNAME] = '\0';
+ bp = hostbuf + MAXDNAME;
+ len = sizeof hostbuf - MAXDNAME;
+ host.h_name = hostbuf;
+ host.h_aliases = host_aliases;
+ host_aliases[0] = NULL;
+ h_addr_ptrs[0] = (char *)host_addr;
+ h_addr_ptrs[1] = NULL;
+ host.h_addr_list = h_addr_ptrs;
+ __set_h_errno (NETDB_SUCCESS);
+ return (&host);
+ }
+ if (!isxdigit(*cp) && *cp != ':' && *cp != '.')
+ break;
+ }
+
+ buf.buf = origbuf = (querybuf *) alloca (1024);
+
+ if ((n = __libc_res_nsearch(&_res, name, C_IN, type, buf.buf->buf, 1024,
+ &buf.ptr, NULL, NULL, NULL, NULL)) < 0) {
+ if (buf.buf != origbuf)
+ free (buf.buf);
+ Dprintf("res_nsearch failed (%d)\n", n);
+ if (errno == ECONNREFUSED)
+ return (_gethtbyname2(name, af));
+ return (NULL);
+ }
+ ret = getanswer(buf.buf, n, name, type);
+ if (buf.buf != origbuf)
+ free (buf.buf);
+ return ret;
+}
+libresolv_hidden_def (gethostbyname2)
+
+struct hostent *
+gethostbyaddr(addr, len, af)
+ const void *addr;
+ socklen_t len;
+ int af;
+{
+ const u_char *uaddr = (const u_char *)addr;
+ static const u_char mapped[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0xff,0xff };
+ static const u_char tunnelled[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 };
+ int n;
+ socklen_t size;
+ union
+ {
+ querybuf *buf;
+ u_char *ptr;
+ } buf;
+ querybuf *orig_buf;
+ struct hostent *hp;
+ char qbuf[MAXDNAME+1], *qp = NULL;
+#ifdef SUNSECURITY
+ struct hostent *rhp;
+ char **haddr;
+ u_long old_options;
+ char hname2[MAXDNAME+1];
+#endif /*SUNSECURITY*/
+
+ if (__res_maybe_init (&_res, 0) == -1) {
+ __set_h_errno (NETDB_INTERNAL);
+ return (NULL);
+ }
+ if (af == AF_INET6 && len == IN6ADDRSZ &&
+ (!memcmp(uaddr, mapped, sizeof mapped) ||
+ !memcmp(uaddr, tunnelled, sizeof tunnelled))) {
+ /* Unmap. */
+ addr += sizeof mapped;
+ uaddr += sizeof mapped;
+ af = AF_INET;
+ len = INADDRSZ;
+ }
+ switch (af) {
+ case AF_INET:
+ size = INADDRSZ;
+ break;
+ case AF_INET6:
+ size = IN6ADDRSZ;
+ break;
+ default:
+ __set_errno (EAFNOSUPPORT);
+ __set_h_errno (NETDB_INTERNAL);
+ return (NULL);
+ }
+ if (size != len) {
+ __set_errno (EINVAL);
+ __set_h_errno (NETDB_INTERNAL);
+ return (NULL);
+ }
+ switch (af) {
+ case AF_INET:
+ (void) sprintf(qbuf, "%u.%u.%u.%u.in-addr.arpa",
+ (uaddr[3] & 0xff),
+ (uaddr[2] & 0xff),
+ (uaddr[1] & 0xff),
+ (uaddr[0] & 0xff));
+ break;
+ case AF_INET6:
+ qp = qbuf;
+ for (n = IN6ADDRSZ - 1; n >= 0; n--) {
+ qp += SPRINTF((qp, "%x.%x.",
+ uaddr[n] & 0xf,
+ (uaddr[n] >> 4) & 0xf));
+ }
+ strcpy(qp, "ip6.arpa");
+ break;
+ default:
+ abort();
+ }
+
+ buf.buf = orig_buf = (querybuf *) alloca (1024);
+
+ n = __libc_res_nquery(&_res, qbuf, C_IN, T_PTR, buf.buf->buf, 1024,
+ &buf.ptr, NULL, NULL, NULL, NULL);
+ if (n < 0 && af == AF_INET6 && (_res.options & RES_NOIP6DOTINT) == 0) {
+ strcpy(qp, "ip6.int");
+ n = __libc_res_nquery(&_res, qbuf, C_IN, T_PTR, buf.buf->buf,
+ buf.buf != orig_buf ? MAXPACKET : 1024,
+ &buf.ptr, NULL, NULL, NULL, NULL);
+ }
+ if (n < 0) {
+ if (buf.buf != orig_buf)
+ free (buf.buf);
+ Dprintf("res_nquery failed (%d)\n", n);
+ if (errno == ECONNREFUSED)
+ return (_gethtbyaddr(addr, len, af));
+ return (NULL);
+ }
+ hp = getanswer(buf.buf, n, qbuf, T_PTR);
+ if (buf.buf != orig_buf)
+ free (buf.buf);
+ if (!hp)
+ return (NULL); /* h_errno was set by getanswer() */
+#ifdef SUNSECURITY
+ if (af == AF_INET) {
+ /*
+ * turn off search as the name should be absolute,
+ * 'localhost' should be matched by defnames
+ */
+ strncpy(hname2, hp->h_name, MAXDNAME);
+ hname2[MAXDNAME] = '\0';
+ old_options = _res.options;
+ _res.options &= ~RES_DNSRCH;
+ _res.options |= RES_DEFNAMES;
+ if (!(rhp = gethostbyname(hname2))) {
+ syslog(LOG_NOTICE|LOG_AUTH,
+ "gethostbyaddr: No A record for %s (verifying [%s])",
+ hname2, inet_ntoa(*((struct in_addr *)addr)));
+ _res.options = old_options;
+ __set_h_errno (HOST_NOT_FOUND);
+ return (NULL);
+ }
+ _res.options = old_options;
+ for (haddr = rhp->h_addr_list; *haddr; haddr++)
+ if (!memcmp(*haddr, addr, INADDRSZ))
+ break;
+ if (!*haddr) {
+ syslog(LOG_NOTICE|LOG_AUTH,
+ "gethostbyaddr: A record of %s != PTR record [%s]",
+ hname2, inet_ntoa(*((struct in_addr *)addr)));
+ __set_h_errno (HOST_NOT_FOUND);
+ return (NULL);
+ }
+ }
+#endif /*SUNSECURITY*/
+ hp->h_addrtype = af;
+ hp->h_length = len;
+ memmove(host_addr, addr, len);
+ h_addr_ptrs[0] = (char *)host_addr;
+ h_addr_ptrs[1] = NULL;
+ if (af == AF_INET && (_res.options & RES_USE_INET6)) {
+ map_v4v6_address((char*)host_addr, (char*)host_addr);
+ hp->h_addrtype = AF_INET6;
+ hp->h_length = IN6ADDRSZ;
+ }
+ __set_h_errno (NETDB_SUCCESS);
+ return (hp);
+}
+
+void
+_sethtent(f)
+ int f;
+{
+ if (!hostf)
+ hostf = fopen(_PATH_HOSTS, "rce" );
+ else
+ rewind(hostf);
+ stayopen = f;
+}
+libresolv_hidden_def (_sethtent)
+
+void
+_endhtent (void)
+{
+ if (hostf && !stayopen) {
+ (void) fclose(hostf);
+ hostf = NULL;
+ }
+}
+
+struct hostent *
+_gethtent (void)
+{
+ char *p;
+ char *cp, **q;
+ int af, len;
+
+ if (!hostf && !(hostf = fopen(_PATH_HOSTS, "rce" ))) {
+ __set_h_errno (NETDB_INTERNAL);
+ return (NULL);
+ }
+ again:
+ if (!(p = fgets(hostbuf, sizeof hostbuf, hostf))) {
+ __set_h_errno (HOST_NOT_FOUND);
+ return (NULL);
+ }
+ if (*p == '#')
+ goto again;
+ if (!(cp = strpbrk(p, "#\n")))
+ goto again;
+ *cp = '\0';
+ if (!(cp = strpbrk(p, " \t")))
+ goto again;
+ *cp++ = '\0';
+ if (inet_pton(AF_INET6, p, host_addr) > 0) {
+ af = AF_INET6;
+ len = IN6ADDRSZ;
+ } else if (inet_pton(AF_INET, p, host_addr) > 0) {
+ if (_res.options & RES_USE_INET6) {
+ map_v4v6_address((char*)host_addr, (char*)host_addr);
+ af = AF_INET6;
+ len = IN6ADDRSZ;
+ } else {
+ af = AF_INET;
+ len = INADDRSZ;
+ }
+ } else {
+ goto again;
+ }
+ h_addr_ptrs[0] = (char *)host_addr;
+ h_addr_ptrs[1] = NULL;
+ host.h_addr_list = h_addr_ptrs;
+ host.h_length = len;
+ host.h_addrtype = af;
+ while (*cp == ' ' || *cp == '\t')
+ cp++;
+ host.h_name = cp;
+ q = host.h_aliases = host_aliases;
+ if ((cp = strpbrk(cp, " \t")))
+ *cp++ = '\0';
+ while (cp && *cp) {
+ if (*cp == ' ' || *cp == '\t') {
+ cp++;
+ continue;
+ }
+ if (q < &host_aliases[MAXALIASES - 1])
+ *q++ = cp;
+ if ((cp = strpbrk(cp, " \t")))
+ *cp++ = '\0';
+ }
+ *q = NULL;
+ __set_h_errno (NETDB_SUCCESS);
+ return (&host);
+}
+libresolv_hidden_def (_gethtent)
+
+struct hostent *
+_gethtbyname(name)
+ const char *name;
+{
+ struct hostent *hp;
+
+ if (_res.options & RES_USE_INET6) {
+ hp = _gethtbyname2(name, AF_INET6);
+ if (hp)
+ return (hp);
+ }
+ return (_gethtbyname2(name, AF_INET));
+}
+
+struct hostent *
+_gethtbyname2(name, af)
+ const char *name;
+ int af;
+{
+ struct hostent *p;
+ char **cp;
+
+ _sethtent(0);
+ while ((p = _gethtent())) {
+ if (p->h_addrtype != af)
+ continue;
+ if (strcasecmp(p->h_name, name) == 0)
+ break;
+ for (cp = p->h_aliases; *cp != 0; cp++)
+ if (strcasecmp(*cp, name) == 0)
+ goto found;
+ }
+ found:
+ _endhtent();
+ return (p);
+}
+libresolv_hidden_def (_gethtbyname2)
+
+struct hostent *
+_gethtbyaddr(addr, len, af)
+ const char *addr;
+ size_t len;
+ int af;
+{
+ struct hostent *p;
+
+ _sethtent(0);
+ while ((p = _gethtent()))
+ if (p->h_addrtype == af && !memcmp(p->h_addr, addr, len))
+ break;
+ _endhtent();
+ return (p);
+}
+libresolv_hidden_def (_gethtbyaddr)
+
+static void
+map_v4v6_address(src, dst)
+ const char *src;
+ char *dst;
+{
+ u_char *p = (u_char *)dst;
+ char tmp[INADDRSZ];
+ int i;
+
+ /* Stash a temporary copy so our caller can update in place. */
+ memcpy(tmp, src, INADDRSZ);
+ /* Mark this ipv6 addr as a mapped ipv4. */
+ for (i = 0; i < 10; i++)
+ *p++ = 0x00;
+ *p++ = 0xff;
+ *p++ = 0xff;
+ /* Retrieve the saved copy and we're done. */
+ memcpy((void*)p, tmp, INADDRSZ);
+}
+
+static void
+map_v4v6_hostent(hp, bpp, lenp)
+ struct hostent *hp;
+ char **bpp;
+ int *lenp;
+{
+ char **ap;
+
+ if (hp->h_addrtype != AF_INET || hp->h_length != INADDRSZ)
+ return;
+ hp->h_addrtype = AF_INET6;
+ hp->h_length = IN6ADDRSZ;
+ for (ap = hp->h_addr_list; *ap; ap++) {
+ int i = sizeof(align) - ((u_long)*bpp % sizeof(align));
+
+ if (*lenp < (i + IN6ADDRSZ)) {
+ /* Out of memory. Truncate address list here. XXX */
+ *ap = NULL;
+ return;
+ }
+ *bpp += i;
+ *lenp -= i;
+ map_v4v6_address(*ap, *bpp);
+ *ap = *bpp;
+ *bpp += IN6ADDRSZ;
+ *lenp -= IN6ADDRSZ;
+ }
+}
+
+#ifdef RESOLVSORT
+extern void
+addrsort(ap, num)
+ char **ap;
+ int num;
+{
+ int i, j;
+ char **p;
+ short aval[MAXADDRS];
+ int needsort = 0;
+
+ p = ap;
+ for (i = 0; i < num; i++, p++) {
+ for (j = 0 ; (unsigned)j < _res.nsort; j++)
+ if (_res.sort_list[j].addr.s_addr ==
+ (((struct in_addr *)(*p))->s_addr & _res.sort_list[j].mask))
+ break;
+ aval[i] = j;
+ if (needsort == 0 && i > 0 && j < aval[i-1])
+ needsort = i;
+ }
+ if (!needsort)
+ return;
+
+ while (needsort < num) {
+ for (j = needsort - 1; j >= 0; j--) {
+ if (aval[j] > aval[j+1]) {
+ char *hp;
+
+ i = aval[j];
+ aval[j] = aval[j+1];
+ aval[j+1] = i;
+
+ hp = ap[j];
+ ap[j] = ap[j+1];
+ ap[j+1] = hp;
+
+ } else
+ break;
+ }
+ needsort++;
+ }
+}
+#endif
+
+#if defined(BSD43_BSD43_NFS) || defined(sun)
+/* some libc's out there are bound internally to these names (UMIPS) */
+void
+ht_sethostent(stayopen)
+ int stayopen;
+{
+ _sethtent(stayopen);
+}
+
+void
+ht_endhostent (void)
+{
+ _endhtent();
+}
+
+struct hostent *
+ht_gethostbyname(name)
+ char *name;
+{
+ return (_gethtbyname(name));
+}
+
+struct hostent *
+ht_gethostbyaddr(addr, len, af)
+ const char *addr;
+ size_t len;
+ int af;
+{
+ return (_gethtbyaddr(addr, len, af));
+}
+
+struct hostent *
+gethostent (void)
+{
+ return (_gethtent());
+}
+
+void
+dns_service (void)
+{
+ return;
+}
+
+#undef dn_skipname
+dn_skipname(comp_dn, eom)
+ const u_char *comp_dn, *eom;
+{
+ return (__dn_skipname(comp_dn, eom));
+}
+#endif /*old-style libc with yp junk in it*/