auto import from //depot/cupcake/@135843
diff --git a/libc/netbsd/resolv/res_data.c b/libc/netbsd/resolv/res_data.c
new file mode 100644
index 0000000..e60ecfd
--- /dev/null
+++ b/libc/netbsd/resolv/res_data.c
@@ -0,0 +1,332 @@
+/* $NetBSD: res_data.c,v 1.8 2004/06/09 18:07:03 christos Exp $ */
+
+/*
+ * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 1995-1999 by Internet Software Consortium.
+ *
+ * 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
+ */
+
+#include <sys/cdefs.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+#ifdef notdef
+static const char rcsid[] = "Id: res_data.c,v 1.1.206.2 2004/03/16 12:34:18 marka Exp";
+#else
+__RCSID("$NetBSD: res_data.c,v 1.8 2004/06/09 18:07:03 christos Exp $");
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include "arpa_nameser.h"
+
+#include <ctype.h>
+#include <netdb.h>
+#include "resolv_private.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+const char * const _res_opcodes[] = {
+ "QUERY",
+ "IQUERY",
+ "CQUERYM",
+ "CQUERYU", /* experimental */
+ "NOTIFY", /* experimental */
+ "UPDATE",
+ "6",
+ "7",
+ "8",
+ "9",
+ "10",
+ "11",
+ "12",
+ "13",
+ "ZONEINIT",
+ "ZONEREF",
+};
+
+#ifdef BIND_UPDATE
+const char * const _res_sectioncodes[] = {
+ "ZONE",
+ "PREREQUISITES",
+ "UPDATE",
+ "ADDITIONAL",
+};
+#endif
+
+#ifndef __BIND_NOSTATIC
+extern struct __res_state _nres;
+
+/* Proto. */
+
+int res_ourserver_p(const res_state, const struct sockaddr *);
+
+#ifdef ANDROID_CHANGES
+int res_need_init() {
+ return ((_nres.options & RES_INIT) == 0U) || res_get_dns_changed();
+}
+#else
+#define res_need_init() ((_nres.options & RES_INIT) == 0U)
+#endif
+
+int
+res_init(void) {
+ int rv;
+ extern int __res_vinit(res_state, int);
+#ifdef COMPAT__RES
+ /*
+ * Compatibility with program that were accessing _res directly
+ * to set options. We keep another struct res that is the same
+ * size as the original res structure, and then copy fields to
+ * it so that we achieve the same initialization
+ */
+ extern void *__res_get_old_state(void);
+ extern void __res_put_old_state(void *);
+ res_state ores = __res_get_old_state();
+
+ if (ores->options != 0)
+ _nres.options = ores->options;
+ if (ores->retrans != 0)
+ _nres.retrans = ores->retrans;
+ if (ores->retry != 0)
+ _nres.retry = ores->retry;
+#endif
+
+ /*
+ * These three fields used to be statically initialized. This made
+ * it hard to use this code in a shared library. It is necessary,
+ * now that we're doing dynamic initialization here, that we preserve
+ * the old semantics: if an application modifies one of these three
+ * fields of _res before res_init() is called, res_init() will not
+ * alter them. Of course, if an application is setting them to
+ * _zero_ before calling res_init(), hoping to override what used
+ * to be the static default, we can't detect it and unexpected results
+ * will follow. Zero for any of these fields would make no sense,
+ * so one can safely assume that the applications were already getting
+ * unexpected results.
+ *
+ * _nres.options is tricky since some apps were known to diddle the bits
+ * before res_init() was first called. We can't replicate that semantic
+ * with dynamic initialization (they may have turned bits off that are
+ * set in RES_DEFAULT). Our solution is to declare such applications
+ * "broken". They could fool us by setting RES_INIT but none do (yet).
+ */
+ if (!_nres.retrans)
+ _nres.retrans = RES_TIMEOUT;
+ if (!_nres.retry)
+ _nres.retry = 4;
+ if (!(_nres.options & RES_INIT))
+ _nres.options = RES_DEFAULT;
+
+ /*
+ * This one used to initialize implicitly to zero, so unless the app
+ * has set it to something in particular, we can randomize it now.
+ */
+ if (!_nres.id)
+ _nres.id = res_randomid();
+
+ rv = __res_vinit(&_nres, 1);
+#ifdef COMPAT__RES
+ __res_put_old_state(&_nres);
+#endif
+ return rv;
+}
+
+void
+p_query(const u_char *msg) {
+ fp_query(msg, stdout);
+}
+
+void
+fp_query(const u_char *msg, FILE *file) {
+ fp_nquery(msg, PACKETSZ, file);
+}
+
+void
+fp_nquery(const u_char *msg, int len, FILE *file) {
+ if (res_need_init() && res_init() == -1)
+ return;
+
+ res_pquery(&_nres, msg, len, file);
+}
+
+int
+res_mkquery(int op, /* opcode of query */
+ const char *dname, /* domain name */
+ int class, int type, /* class and type of query */
+ const u_char *data, /* resource record data */
+ int datalen, /* length of data */
+ const u_char *newrr_in, /* new rr for modify or append */
+ u_char *buf, /* buffer to put query */
+ int buflen) /* size of buffer */
+{
+ if (res_need_init() && res_init() == -1) {
+ RES_SET_H_ERRNO(&_nres, NETDB_INTERNAL);
+ return (-1);
+ }
+ return (res_nmkquery(&_nres, op, dname, class, type,
+ data, datalen,
+ newrr_in, buf, buflen));
+}
+
+#ifdef _LIBRESOLV
+int
+res_mkupdate(ns_updrec *rrecp_in, u_char *buf, int buflen) {
+ if (res_need_init() && res_init() == -1) {
+ RES_SET_H_ERRNO(&_nres, NETDB_INTERNAL);
+ return (-1);
+ }
+
+ return (res_nmkupdate(&_nres, rrecp_in, buf, buflen));
+}
+#endif
+
+int
+res_query(const char *name, /* domain name */
+ int class, int type, /* class and type of query */
+ u_char *answer, /* buffer to put answer */
+ int anslen) /* size of answer buffer */
+{
+ if (res_need_init() && res_init() == -1) {
+ RES_SET_H_ERRNO(&_nres, NETDB_INTERNAL);
+ return (-1);
+ }
+ return (res_nquery(&_nres, name, class, type, answer, anslen));
+}
+
+void
+res_send_setqhook(res_send_qhook hook) {
+ _nres.qhook = hook;
+}
+
+void
+res_send_setrhook(res_send_rhook hook) {
+ _nres.rhook = hook;
+}
+
+int
+res_isourserver(const struct sockaddr_in *inp) {
+ return (res_ourserver_p(&_nres, (const struct sockaddr *)(const void *)inp));
+}
+
+int
+res_send(const u_char *buf, int buflen, u_char *ans, int anssiz) {
+ if (res_need_init() && res_init() == -1) {
+ /* errno should have been set by res_init() in this case. */
+ return (-1);
+ }
+
+ return (res_nsend(&_nres, buf, buflen, ans, anssiz));
+}
+
+#ifdef _LIBRESOLV
+int
+res_sendsigned(const u_char *buf, int buflen, ns_tsig_key *key,
+ u_char *ans, int anssiz)
+{
+ if (res_need_init() && res_init() == -1) {
+ /* errno should have been set by res_init() in this case. */
+ return (-1);
+ }
+
+ return (res_nsendsigned(&_nres, buf, buflen, key, ans, anssiz));
+}
+#endif
+
+void
+res_close(void) {
+ res_nclose(&_nres);
+}
+
+#ifdef _LIBRESOLV
+int
+res_update(ns_updrec *rrecp_in) {
+ if (res_need_init() && res_init() == -1) {
+ RES_SET_H_ERRNO(&_nres, NETDB_INTERNAL);
+ return (-1);
+ }
+
+ return (res_nupdate(&_nres, rrecp_in, NULL));
+}
+#endif
+
+int
+res_search(const char *name, /* domain name */
+ int class, int type, /* class and type of query */
+ u_char *answer, /* buffer to put answer */
+ int anslen) /* size of answer */
+{
+ if (res_need_init() && res_init() == -1) {
+ RES_SET_H_ERRNO(&_nres, NETDB_INTERNAL);
+ return (-1);
+ }
+
+ return (res_nsearch(&_nres, name, class, type, answer, anslen));
+}
+
+int
+res_querydomain(const char *name,
+ const char *domain,
+ int class, int type, /* class and type of query */
+ u_char *answer, /* buffer to put answer */
+ int anslen) /* size of answer */
+{
+ if (res_need_init() && res_init() == -1) {
+ RES_SET_H_ERRNO(&_nres, NETDB_INTERNAL);
+ return (-1);
+ }
+
+ return (res_nquerydomain(&_nres, name, domain,
+ class, type,
+ answer, anslen));
+}
+
+int
+res_opt(int a, u_char *b, int c, int d)
+{
+ return res_nopt(&_nres, a, b, c, d);
+}
+
+const char *
+hostalias(const char *name) {
+ return NULL;
+}
+
+#ifdef ultrix
+int
+local_hostname_length(const char *hostname) {
+ int len_host, len_domain;
+
+ if (!*_nres.defdname)
+ res_init();
+ len_host = strlen(hostname);
+ len_domain = strlen(_nres.defdname);
+ if (len_host > len_domain &&
+ !strcasecmp(hostname + len_host - len_domain, _nres.defdname) &&
+ hostname[len_host - len_domain - 1] == '.')
+ return (len_host - len_domain - 1);
+ return (0);
+}
+#endif /*ultrix*/
+
+#endif