mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-31 22:10:34 +03:00
300 lines
10 KiB
C
300 lines
10 KiB
C
/* Test getnetbyname and getnetbyaddr.
|
|
Copyright (C) 2016-2017 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <netdb.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <support/check.h>
|
|
#include <support/check_nss.h>
|
|
#include <support/resolv_test.h>
|
|
#include <support/support.h>
|
|
#include <support/xmemstream.h>
|
|
|
|
static void
|
|
send_ptr (struct resolv_response_builder *b,
|
|
const char *qname, uint16_t qclass, uint16_t qtype,
|
|
const char *alias)
|
|
{
|
|
resolv_response_init (b, (struct resolv_response_flags) {});
|
|
resolv_response_add_question (b, qname, qclass, qtype);
|
|
resolv_response_section (b, ns_s_an);
|
|
resolv_response_open_record (b, qname, qclass, T_PTR, 0);
|
|
resolv_response_add_name (b, alias);
|
|
resolv_response_close_record (b);
|
|
}
|
|
|
|
static void
|
|
handle_code (const struct resolv_response_context *ctx,
|
|
struct resolv_response_builder *b,
|
|
const char *qname, uint16_t qclass, uint16_t qtype,
|
|
int code)
|
|
{
|
|
switch (code)
|
|
{
|
|
case 1:
|
|
send_ptr (b, qname, qclass, qtype, "1.in-addr.arpa");
|
|
break;
|
|
case 2:
|
|
send_ptr (b, qname, qclass, qtype, "2.1.in-addr.arpa");
|
|
break;
|
|
case 3:
|
|
send_ptr (b, qname, qclass, qtype, "3.2.1.in-addr.arpa");
|
|
break;
|
|
case 4:
|
|
send_ptr (b, qname, qclass, qtype, "4.3.2.1.in-addr.arpa");
|
|
break;
|
|
case 5:
|
|
/* Test multiple PTR records. */
|
|
resolv_response_init (b, (struct resolv_response_flags) {});
|
|
resolv_response_add_question (b, qname, qclass, qtype);
|
|
resolv_response_section (b, ns_s_an);
|
|
resolv_response_open_record (b, qname, qclass, T_PTR, 0);
|
|
resolv_response_add_name (b, "127.in-addr.arpa");
|
|
resolv_response_close_record (b);
|
|
resolv_response_open_record (b, qname, qclass, T_PTR, 0);
|
|
resolv_response_add_name (b, "0.in-addr.arpa");
|
|
resolv_response_close_record (b);
|
|
break;
|
|
case 6:
|
|
/* Test skipping of RRSIG record. */
|
|
resolv_response_init (b, (struct resolv_response_flags) { });
|
|
resolv_response_add_question (b, qname, qclass, qtype);
|
|
resolv_response_section (b, ns_s_an);
|
|
|
|
resolv_response_open_record (b, qname, qclass, T_PTR, 0);
|
|
resolv_response_add_name (b, "127.in-addr.arpa");
|
|
resolv_response_close_record (b);
|
|
|
|
resolv_response_open_record (b, qname, qclass, 46 /* RRSIG */, 0);
|
|
{
|
|
char buf[500];
|
|
memset (buf, 0x3f, sizeof (buf));
|
|
resolv_response_add_data (b, buf, sizeof (buf));
|
|
}
|
|
resolv_response_close_record (b);
|
|
|
|
resolv_response_open_record (b, qname, qclass, T_PTR, 0);
|
|
resolv_response_add_name (b, "0.in-addr.arpa");
|
|
resolv_response_close_record (b);
|
|
break;
|
|
case 7:
|
|
/* Test CNAME handling. */
|
|
resolv_response_init (b, (struct resolv_response_flags) { });
|
|
resolv_response_add_question (b, qname, qclass, qtype);
|
|
resolv_response_section (b, ns_s_an);
|
|
resolv_response_open_record (b, qname, qclass, T_CNAME, 0);
|
|
resolv_response_add_name (b, "cname.example");
|
|
resolv_response_close_record (b);
|
|
resolv_response_open_record (b, "cname.example", qclass, T_PTR, 0);
|
|
resolv_response_add_name (b, "4.3.2.1.in-addr.arpa");
|
|
resolv_response_close_record (b);
|
|
break;
|
|
|
|
case 100:
|
|
resolv_response_init (b, (struct resolv_response_flags) { .rcode = 0, });
|
|
resolv_response_add_question (b, qname, qclass, qtype);
|
|
break;
|
|
case 101:
|
|
resolv_response_init (b, (struct resolv_response_flags)
|
|
{ .rcode = NXDOMAIN, });
|
|
resolv_response_add_question (b, qname, qclass, qtype);
|
|
break;
|
|
case 102:
|
|
resolv_response_init (b, (struct resolv_response_flags) {.rcode = SERVFAIL});
|
|
resolv_response_add_question (b, qname, qclass, qtype);
|
|
break;
|
|
case 103:
|
|
/* Check response length matching. */
|
|
if (!ctx->tcp)
|
|
{
|
|
resolv_response_init (b, (struct resolv_response_flags) {.tc = true});
|
|
resolv_response_add_question (b, qname, qclass, qtype);
|
|
}
|
|
else
|
|
{
|
|
resolv_response_init (b, (struct resolv_response_flags) {.ancount = 1});
|
|
resolv_response_add_question (b, qname, qclass, qtype);
|
|
resolv_response_section (b, ns_s_an);
|
|
resolv_response_open_record (b, qname, qclass, T_PTR, 0);
|
|
resolv_response_add_name (b, "127.in-addr.arpa");
|
|
resolv_response_close_record (b);
|
|
resolv_response_open_record (b, qname, qclass, T_PTR, 0);
|
|
resolv_response_add_name (b, "example");
|
|
resolv_response_close_record (b);
|
|
|
|
resolv_response_open_record (b, qname, qclass, T_PTR, 0);
|
|
size_t to_fill = 65535 - resolv_response_length (b)
|
|
- 2 /* length, "n" */ - 2 /* compression reference */
|
|
- 2 /* RR type */;
|
|
for (size_t i = 0; i < to_fill; ++i)
|
|
resolv_response_add_data (b, "", 1);
|
|
resolv_response_close_record (b);
|
|
resolv_response_add_name (b, "n.example");
|
|
uint16_t rrtype = htons (T_PTR);
|
|
resolv_response_add_data (b, &rrtype, sizeof (rrtype));
|
|
}
|
|
break;
|
|
default:
|
|
FAIL_EXIT1 ("invalid QNAME: %s (code %d)", qname, code);
|
|
}
|
|
}
|
|
|
|
static void
|
|
response (const struct resolv_response_context *ctx,
|
|
struct resolv_response_builder *b,
|
|
const char *qname, uint16_t qclass, uint16_t qtype)
|
|
{
|
|
int code;
|
|
if (strstr (qname, "in-addr.arpa") == NULL)
|
|
{
|
|
char *tail;
|
|
if (sscanf (qname, "code%d.%ms", &code, &tail) != 2
|
|
|| strcmp (tail, "example") != 0)
|
|
FAIL_EXIT1 ("invalid QNAME: %s", qname);
|
|
free (tail);
|
|
handle_code (ctx, b, qname, qclass, qtype, code);
|
|
}
|
|
else
|
|
{
|
|
/* Reverse lookup. */
|
|
int components[4];
|
|
char *tail;
|
|
if (sscanf (qname, "%d.%d.%d.%d.%ms",
|
|
components, components + 1, components + 2, components + 3,
|
|
&tail) != 5
|
|
|| strcmp (tail, "in-addr.arpa") != 0)
|
|
FAIL_EXIT1 ("invalid QNAME: %s", qname);
|
|
free (tail);
|
|
handle_code (ctx, b, qname, qclass, qtype, components[3]);
|
|
}
|
|
}
|
|
|
|
static void
|
|
check_reverse (int code, const char *expected)
|
|
{
|
|
char *query = xasprintf ("code=%d", code);
|
|
check_netent (query, getnetbyaddr (code, AF_INET), expected);
|
|
free (query);
|
|
}
|
|
|
|
/* Test for CVE-2016-3075. */
|
|
static void
|
|
check_long_name (void)
|
|
{
|
|
struct xmemstream mem;
|
|
xopen_memstream (&mem);
|
|
|
|
char label[65];
|
|
memset (label, 'x', 63);
|
|
label[63] = '.';
|
|
label[64] = '\0';
|
|
for (unsigned i = 0; i < 64 * 1024 * 1024 / strlen (label); ++i)
|
|
fprintf (mem.out, "%s", label);
|
|
|
|
xfclose_memstream (&mem);
|
|
|
|
check_netent ("long name", getnetbyname (mem.buffer),
|
|
"error: NO_RECOVERY\n");
|
|
|
|
free (mem.buffer);
|
|
}
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
struct resolv_test *obj = resolv_test_start
|
|
((struct resolv_redirect_config)
|
|
{
|
|
.response_callback = response
|
|
});
|
|
|
|
/* Lookup by name, success cases. */
|
|
check_netent ("code1.example", getnetbyname ("code1.example"),
|
|
"alias: 1.in-addr.arpa\n"
|
|
"net: 0x00000001\n");
|
|
check_netent ("code2.example", getnetbyname ("code2.example"),
|
|
"alias: 2.1.in-addr.arpa\n"
|
|
"net: 0x00000102\n");
|
|
check_netent ("code3.example", getnetbyname ("code3.example"),
|
|
"alias: 3.2.1.in-addr.arpa\n"
|
|
"net: 0x00010203\n");
|
|
check_netent ("code4.example", getnetbyname ("code4.example"),
|
|
"alias: 4.3.2.1.in-addr.arpa\n"
|
|
"net: 0x01020304\n");
|
|
check_netent ("code5.example", getnetbyname ("code5.example"),
|
|
"alias: 127.in-addr.arpa\n"
|
|
"alias: 0.in-addr.arpa\n"
|
|
"net: 0x0000007f\n");
|
|
check_netent ("code6.example", getnetbyname ("code6.example"),
|
|
"alias: 127.in-addr.arpa\n"
|
|
"alias: 0.in-addr.arpa\n"
|
|
"net: 0x0000007f\n");
|
|
check_netent ("code7.example", getnetbyname ("code7.example"),
|
|
"alias: 4.3.2.1.in-addr.arpa\n"
|
|
"net: 0x01020304\n");
|
|
|
|
/* Lookup by name, failure cases. */
|
|
check_netent ("code100.example", getnetbyname ("code100.example"),
|
|
"error: NO_ADDRESS\n");
|
|
check_netent ("code101.example", getnetbyname ("code101.example"),
|
|
"error: HOST_NOT_FOUND\n");
|
|
check_netent ("code102.example", getnetbyname ("code102.example"),
|
|
"error: TRY_AGAIN\n");
|
|
check_netent ("code103.example", getnetbyname ("code103.example"),
|
|
"error: NO_RECOVERY\n");
|
|
|
|
/* Lookup by address, success cases. */
|
|
check_reverse (1,
|
|
"name: 1.in-addr.arpa\n"
|
|
"net: 0x00000001\n");
|
|
check_reverse (2,
|
|
"name: 2.1.in-addr.arpa\n"
|
|
"net: 0x00000002\n");
|
|
check_reverse (3,
|
|
"name: 3.2.1.in-addr.arpa\n"
|
|
"net: 0x00000003\n");
|
|
check_reverse (4,
|
|
"name: 4.3.2.1.in-addr.arpa\n"
|
|
"net: 0x00000004\n");
|
|
check_reverse (5,
|
|
"name: 127.in-addr.arpa\n"
|
|
"alias: 0.in-addr.arpa\n"
|
|
"net: 0x00000005\n");
|
|
check_reverse (6,
|
|
"name: 127.in-addr.arpa\n"
|
|
"alias: 0.in-addr.arpa\n"
|
|
"net: 0x00000006\n");
|
|
check_reverse (7,
|
|
"name: 4.3.2.1.in-addr.arpa\n"
|
|
"net: 0x00000007\n");
|
|
|
|
/* Lookup by address, failure cases. */
|
|
check_reverse (100,
|
|
"error: NO_ADDRESS\n");
|
|
check_reverse (101,
|
|
"error: HOST_NOT_FOUND\n");
|
|
check_reverse (102,
|
|
"error: TRY_AGAIN\n");
|
|
check_reverse (103,
|
|
"error: NO_RECOVERY\n");
|
|
|
|
check_long_name ();
|
|
|
|
resolv_test_end (obj);
|
|
}
|