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-rw-r--r--resolv/Makefile2
-rw-r--r--resolv/gethnamaddr.c82
-rw-r--r--resolv/inet_addr.c20
-rw-r--r--resolv/netdb.h170
-rw-r--r--resolv/res_send.c11
5 files changed, 242 insertions, 43 deletions
diff --git a/resolv/Makefile b/resolv/Makefile
index e07cfb0b15..f1a8701017 100644
--- a/resolv/Makefile
+++ b/resolv/Makefile
@@ -21,7 +21,7 @@
#
subdir := resolv
-headers := resolv.h arpa/nameser.h sys/bitypes.h
+headers := resolv.h netdb.h arpa/nameser.h sys/bitypes.h
distribute := ../conf/portability.h
routines := gethnamaddr getnetbyaddr getnetbyname getnetent getnetnamadr \
diff --git a/resolv/gethnamaddr.c b/resolv/gethnamaddr.c
index d3b68f7d95..87b4db1a6f 100644
--- a/resolv/gethnamaddr.c
+++ b/resolv/gethnamaddr.c
@@ -93,6 +93,7 @@ static const char AskedForGot[] =
"gethostby*.getanswer: asked for \"%s\", got \"%s\"";
static char *h_addr_ptrs[MAXADDRS + 1];
+static struct hostent *gethostbyname_ipv4 __P((const char *));
static struct hostent host;
static char *host_aliases[MAXALIASES];
@@ -156,7 +157,9 @@ getanswer(answer, anslen, qname, qclass, qtype)
int haveanswer, had_error;
int toobig = 0;
char tbuf[MAXDNAME+1];
+ const char *tname;
+ tname = qname;
host.h_name = NULL;
eom = answer->buf + anslen;
/*
@@ -249,19 +252,36 @@ getanswer(answer, anslen, qname, qclass, qtype)
buflen -= n;
continue;
}
+ if (qtype == T_PTR && type == T_CNAME) {
+ n = dn_expand(answer->buf, eom, cp, tbuf, sizeof tbuf);
+ if (n < 0) {
+ had_error++;
+ continue;
+ }
+ cp += n;
+ /* Get canonical name. */
+ n = strlen(tbuf) + 1; /* for the \0 */
+ if (n > buflen) {
+ had_error++;
+ continue;
+ }
+ strcpy(bp, tbuf);
+ tname = bp;
+ bp += n;
+ buflen -= n;
+ continue;
+ }
if (type != qtype) {
- /* CNAME->PTR should not cause a log message. */
- if (!(qtype == T_PTR && type == T_CNAME))
- syslog(LOG_NOTICE|LOG_AUTH,
+ syslog(LOG_NOTICE|LOG_AUTH,
"gethostby*.getanswer: asked for \"%s %s %s\", got type \"%s\"",
- qname, p_class(qclass), p_type(qtype),
- p_type(type));
+ qname, p_class(qclass), p_type(qtype),
+ p_type(type));
cp += n;
continue; /* XXX - had_error++ ? */
}
switch (type) {
case T_PTR:
- if (strcasecmp(qname, bp) != 0) {
+ if (strcasecmp(tname, bp) != 0) {
syslog(LOG_NOTICE|LOG_AUTH,
AskedForGot, qname, bp);
cp += n;
@@ -377,6 +397,36 @@ struct hostent *
gethostbyname(name)
const char *name;
{
+ struct hostent *hp;
+
+#if defined(AF_INET6) && defined(RES_TRY_INET6)
+ if (_res.options & RES_TRY_INET6) {
+ hp = gethostbyname2(name, AF_INET6);
+ if (hp)
+ return (hp);
+ }
+#endif
+ return (gethostbyname2(name, AF_INET));
+}
+
+struct hostent *
+gethostbyname2(name, af)
+ const char *name;
+ int af;
+{
+ switch (af) {
+ case AF_INET:
+ return (gethostbyname_ipv4(name));
+ }
+ errno = EAFNOSUPPORT;
+ h_errno = NETDB_INTERNAL;
+ return (NULL);
+}
+
+static struct hostent *
+gethostbyname_ipv4(name)
+ const char *name;
+{
querybuf buf;
register const char *cp;
int n;
@@ -727,23 +777,3 @@ dn_skipname(comp_dn, eom)
return (__dn_skipname(comp_dn, eom));
}
#endif /*old-style libc with yp junk in it*/
-
-#ifdef ultrix
-/* more icky libc packaging in ultrix */
-int
-local_hostname_length(hostname)
- const char *hostname;
-{
- int len_host, len_domain;
-
- if (!*_res.defdname)
- res_init();
- len_host = strlen(hostname);
- len_domain = strlen(_res.defdname);
- if (len_host > len_domain &&
- !strcasecmp(hostname + len_host - len_domain, _res.defdname) &&
- hostname[len_host - len_domain - 1] == '.')
- return (len_host - len_domain - 1);
- return (0);
-}
-#endif
diff --git a/resolv/inet_addr.c b/resolv/inet_addr.c
index 2a15067b07..01a38e6a00 100644
--- a/resolv/inet_addr.c
+++ b/resolv/inet_addr.c
@@ -66,10 +66,6 @@ static char rcsid[] = "$Id$";
/* these are compatibility routines, not needed on recent BSD releases */
-#ifndef NEED_INETADDR
-int __inet_addr_unneeded__;
-#else
-
/*
* Ascii internet address interpretation routine.
* The value returned is in network order.
@@ -84,11 +80,6 @@ inet_addr(cp)
return (val.s_addr);
return (INADDR_NONE);
}
-#endif /*NEED_INETADDR*/
-
-#ifndef NEED_INETATON
-int __inet_aton_unneeded__;
-#else
/*
* Check whether "cp" is a valid ascii representation
@@ -113,8 +104,10 @@ inet_aton(cp, addr)
/*
* Collect number up to ``.''.
* Values are specified as for C:
- * 0x=hex, 0=octal, other=decimal.
+ * 0x=hex, 0=octal, isdigit=decimal.
*/
+ if (!isdigit(c))
+ return (0);
val = 0; base = 10;
if (c == '0') {
c = *++cp;
@@ -123,7 +116,7 @@ inet_aton(cp, addr)
else
base = 8;
}
- while (c != '\0') {
+ for (;;) {
if (isascii(c) && isdigit(c)) {
val = (val * base) + (c - '0');
c = *++cp;
@@ -141,7 +134,7 @@ inet_aton(cp, addr)
* a.b.c (with c treated as 16 bits)
* a.b (with b treated as 24 bits)
*/
- if (pp >= parts + 3 || val > 0xff)
+ if (pp >= parts + 3)
return (0);
*pp++ = val;
c = *++cp;
@@ -151,7 +144,7 @@ inet_aton(cp, addr)
/*
* Check for trailing characters.
*/
- if (c && (!isascii(c) || (!isspace(c) && !ispunct(c))))
+ if (c != '\0' && (!isascii(c) || !isspace(c)))
return (0);
/*
* Concoct the address according to
@@ -188,4 +181,3 @@ inet_aton(cp, addr)
addr->s_addr = htonl(val);
return (1);
}
-#endif /*NEED_INETATON*/
diff --git a/resolv/netdb.h b/resolv/netdb.h
new file mode 100644
index 0000000000..822b621363
--- /dev/null
+++ b/resolv/netdb.h
@@ -0,0 +1,170 @@
+/*
+ * ++Copyright++ 1980, 1983, 1988, 1993
+ * -
+ * Copyright (c) 1980, 1983, 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.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 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--
+ */
+
+/*
+ * @(#)netdb.h 8.1 (Berkeley) 6/2/93
+ * $Id$
+ */
+
+#ifndef _NETDB_H_
+#define _NETDB_H_
+
+#include <sys/param.h>
+#if (!defined(BSD)) || (BSD < 199306)
+# include <sys/bitypes.h>
+#endif
+#include <sys/cdefs.h>
+
+#define _PATH_HEQUIV "/etc/hosts.equiv"
+#define _PATH_HOSTS "/etc/hosts"
+#define _PATH_NETWORKS "/etc/networks"
+#define _PATH_PROTOCOLS "/etc/protocols"
+#define _PATH_SERVICES "/etc/services"
+
+extern int h_errno;
+
+/*
+ * Structures returned by network data base library. All addresses are
+ * supplied in host order, and returned in network order (suitable for
+ * use in system calls).
+ */
+struct hostent {
+ char *h_name; /* official name of host */
+ char **h_aliases; /* alias list */
+ int h_addrtype; /* host address type */
+ int h_length; /* length of address */
+ char **h_addr_list; /* list of addresses from name server */
+#define h_addr h_addr_list[0] /* address, for backward compatiblity */
+};
+
+/*
+ * Assumption here is that a network number
+ * fits in an unsigned long -- probably a poor one.
+ */
+struct netent {
+ char *n_name; /* official name of net */
+ char **n_aliases; /* alias list */
+ int n_addrtype; /* net address type */
+ unsigned long n_net; /* network # */
+};
+
+struct servent {
+ char *s_name; /* official service name */
+ char **s_aliases; /* alias list */
+ int s_port; /* port # */
+ char *s_proto; /* protocol to use */
+};
+
+struct protoent {
+ char *p_name; /* official protocol name */
+ char **p_aliases; /* alias list */
+ int p_proto; /* protocol # */
+};
+
+/*
+ * Error return codes from gethostbyname() and gethostbyaddr()
+ * (left in extern int h_errno).
+ */
+
+#define NETDB_INTERNAL -1 /* see errno */
+#define NETDB_SUCCESS 0 /* no problem */
+#define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found */
+#define TRY_AGAIN 2 /* Non-Authoritive Host not found, or SERVERFAIL */
+#define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */
+#define NO_DATA 4 /* Valid name, no data record of requested type */
+#define NO_ADDRESS NO_DATA /* no address, look for MX record */
+
+__BEGIN_DECLS
+void endhostent __P((void));
+void endnetent __P((void));
+void endprotoent __P((void));
+void endservent __P((void));
+struct hostent *gethostbyaddr __P((const char *, int, int));
+struct hostent *gethostbyname __P((const char *));
+struct hostent *gethostbyname2 __P((const char *, int));
+struct hostent *gethostent __P((void));
+struct netent *getnetbyaddr __P((long, int)); /* u_long? */
+struct netent *getnetbyname __P((const char *));
+struct netent *getnetent __P((void));
+struct protoent *getprotobyname __P((const char *));
+struct protoent *getprotobynumber __P((int));
+struct protoent *getprotoent __P((void));
+struct servent *getservbyname __P((const char *, const char *));
+struct servent *getservbyport __P((int, const char *));
+struct servent *getservent __P((void));
+void herror __P((const char *));
+const char *hstrerror __P((int));
+void sethostent __P((int));
+/* void sethostfile __P((const char *)); */
+void setnetent __P((int));
+void setprotoent __P((int));
+void setservent __P((int));
+__END_DECLS
+
+/* This is nec'y to make this include file properly replace the sun version. */
+#ifdef __GNU_LIBRARY__
+#include <rpc/netdb.h>
+#else
+#ifdef sun
+struct rpcent {
+ char *r_name; /* name of server for this rpc program */
+ char **r_aliases; /* alias list */
+ int r_number; /* rpc program number */
+};
+struct rpcent *getrpcbyname(), *getrpcbynumber(), *getrpcent();
+#endif /* sun */
+#endif /* __GNU_LIBRARY__ */
+
+#endif /* !_NETDB_H_ */
diff --git a/resolv/res_send.c b/resolv/res_send.c
index 4ee52b438b..f8e58f3e11 100644
--- a/resolv/res_send.c
+++ b/resolv/res_send.c
@@ -109,6 +109,13 @@ static int vc = 0; /* is the socket a virtual ciruit? */
#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
#endif
+/* XXX - this should be done in portability.h */
+#if (defined(BSD) && (BSD >= 199103)) || defined(linux)
+# define CAN_RECONNECT 1
+#else
+# define CAN_RECONNECT 0
+#endif
+
#ifndef DEBUG
# define Dprint(cond, args) /*empty*/
# define DprintQ(cond, args, query, size) /*empty*/
@@ -484,7 +491,7 @@ res_send(buf, buflen, ans, anssiz)
_res_close();
s = socket(PF_INET, SOCK_DGRAM, 0);
if (s < 0) {
-#if !defined(BSD) || (BSD < 199103)
+#if !CAN_RECONNECT
bad_dg_sock:
#endif
terrno = errno;
@@ -538,7 +545,7 @@ res_send(buf, buflen, ans, anssiz)
* for responses from more than one server.
*/
if (connected) {
-#if defined(BSD) && (BSD >= 199103)
+#if CAN_RECONNECT
struct sockaddr_in no_addr;
no_addr.sin_family = AF_INET;