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-rw-r--r--nss/Makefile3
-rw-r--r--nss/tst-nss-gai-actions.c149
-rw-r--r--nss/tst-nss-gai-actions.root/etc/host.conf1
-rw-r--r--nss/tst-nss-gai-actions.root/etc/hosts508
-rw-r--r--sysdeps/posix/getaddrinfo.c143
5 files changed, 751 insertions, 53 deletions
diff --git a/nss/Makefile b/nss/Makefile
index de439d4911..b2301c4cd7 100644
--- a/nss/Makefile
+++ b/nss/Makefile
@@ -70,7 +70,8 @@ tests-container = \
tst-nss-files-hosts-long \
tst-nss-db-endpwent \
tst-nss-db-endgrent \
- tst-reload1 tst-reload2
+ tst-reload1 tst-reload2 \
+ tst-nss-gai-actions
# Tests which need libdl
ifeq (yes,$(build-shared))
diff --git a/nss/tst-nss-gai-actions.c b/nss/tst-nss-gai-actions.c
new file mode 100644
index 0000000000..efca6cd183
--- /dev/null
+++ b/nss/tst-nss-gai-actions.c
@@ -0,0 +1,149 @@
+/* Test continue and merge NSS actions for getaddrinfo.
+ Copyright The GNU Toolchain Authors.
+ 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <dlfcn.h>
+#include <gnu/lib-names.h>
+#include <nss.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <support/check.h>
+#include <support/format_nss.h>
+#include <support/support.h>
+#include <support/xstdio.h>
+#include <support/xunistd.h>
+
+enum
+{
+ ACTION_MERGE = 0,
+ ACTION_CONTINUE,
+};
+
+static const char *
+family_str (int family)
+{
+ switch (family)
+ {
+ case AF_UNSPEC:
+ return "AF_UNSPEC";
+ case AF_INET:
+ return "AF_INET";
+ default:
+ __builtin_unreachable ();
+ }
+}
+
+static const char *
+action_str (int action)
+{
+ switch (action)
+ {
+ case ACTION_MERGE:
+ return "merge";
+ case ACTION_CONTINUE:
+ return "continue";
+ default:
+ __builtin_unreachable ();
+ }
+}
+
+static void
+do_one_test (int action, int family, bool canon)
+{
+ struct addrinfo hints =
+ {
+ .ai_family = family,
+ };
+
+ struct addrinfo *ai;
+
+ if (canon)
+ hints.ai_flags = AI_CANONNAME;
+
+ printf ("***** Testing \"files [SUCCESS=%s] files\" for family %s, %s\n",
+ action_str (action), family_str (family),
+ canon ? "AI_CANONNAME" : "");
+
+ int ret = getaddrinfo ("example.org", "80", &hints, &ai);
+
+ switch (action)
+ {
+ case ACTION_MERGE:
+ if (ret == 0)
+ {
+ char *formatted = support_format_addrinfo (ai, ret);
+
+ printf ("merge unexpectedly succeeded:\n %s\n", formatted);
+ support_record_failure ();
+ free (formatted);
+ }
+ else
+ return;
+ case ACTION_CONTINUE:
+ {
+ char *formatted = support_format_addrinfo (ai, ret);
+
+ /* Verify that the result appears exactly once. */
+ const char *expected = "address: STREAM/TCP 192.0.0.1 80\n"
+ "address: DGRAM/UDP 192.0.0.1 80\n"
+ "address: RAW/IP 192.0.0.1 80\n";
+
+ const char *contains = strstr (formatted, expected);
+ const char *contains2 = NULL;
+
+ if (contains != NULL)
+ contains2 = strstr (contains + strlen (expected), expected);
+
+ if (contains == NULL || contains2 != NULL)
+ {
+ printf ("continue failed:\n%s\n", formatted);
+ support_record_failure ();
+ }
+
+ free (formatted);
+ break;
+ }
+ default:
+ __builtin_unreachable ();
+ }
+}
+
+static void
+do_one_test_set (int action)
+{
+ char buf[32];
+
+ snprintf (buf, sizeof (buf), "files [SUCCESS=%s] files",
+ action_str (action));
+ __nss_configure_lookup ("hosts", buf);
+
+ do_one_test (action, AF_UNSPEC, false);
+ do_one_test (action, AF_INET, false);
+ do_one_test (action, AF_INET, true);
+}
+
+static int
+do_test (void)
+{
+ do_one_test_set (ACTION_CONTINUE);
+ do_one_test_set (ACTION_MERGE);
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/nss/tst-nss-gai-actions.root/etc/host.conf b/nss/tst-nss-gai-actions.root/etc/host.conf
new file mode 100644
index 0000000000..d1a59f73a9
--- /dev/null
+++ b/nss/tst-nss-gai-actions.root/etc/host.conf
@@ -0,0 +1 @@
+multi on
diff --git a/nss/tst-nss-gai-actions.root/etc/hosts b/nss/tst-nss-gai-actions.root/etc/hosts
new file mode 100644
index 0000000000..50ce9774dc
--- /dev/null
+++ b/nss/tst-nss-gai-actions.root/etc/hosts
@@ -0,0 +1,508 @@
+192.0.0.1 example.org
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+192.0.1.221 example.org
+192.0.1.222 example.org
+192.0.1.223 example.org
+192.0.1.224 example.org
+192.0.1.225 example.org
+192.0.1.226 example.org
+192.0.1.227 example.org
+192.0.1.228 example.org
+192.0.1.229 example.org
+192.0.1.230 example.org
+192.0.1.231 example.org
+192.0.1.232 example.org
+192.0.1.233 example.org
+192.0.1.234 example.org
+192.0.1.235 example.org
+192.0.1.236 example.org
+192.0.1.237 example.org
+192.0.1.238 example.org
+192.0.1.239 example.org
+192.0.1.240 example.org
+192.0.1.241 example.org
+192.0.1.242 example.org
+192.0.1.243 example.org
+192.0.1.244 example.org
+192.0.1.245 example.org
+192.0.1.246 example.org
+192.0.1.247 example.org
+192.0.1.248 example.org
+192.0.1.249 example.org
+192.0.1.250 example.org
+192.0.1.251 example.org
+192.0.1.252 example.org
+192.0.1.253 example.org
+192.0.1.254 example.org
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 18dccd5924..3d9bea60c6 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -458,11 +458,6 @@ gaih_inet (const char *name, const struct gaih_service *service,
if (name != NULL)
{
- at = alloca_account (sizeof (struct gaih_addrtuple), alloca_used);
- at->family = AF_UNSPEC;
- at->scopeid = 0;
- at->next = NULL;
-
if (req->ai_flags & AI_IDN)
{
char *out;
@@ -473,13 +468,21 @@ gaih_inet (const char *name, const struct gaih_service *service,
malloc_name = true;
}
- if (__inet_aton_exact (name, (struct in_addr *) at->addr) != 0)
+ uint32_t addr[4];
+ if (__inet_aton_exact (name, (struct in_addr *) addr) != 0)
{
+ at = alloca_account (sizeof (struct gaih_addrtuple), alloca_used);
+ at->scopeid = 0;
+ at->next = NULL;
+
if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET)
- at->family = AF_INET;
+ {
+ memcpy (at->addr, addr, sizeof (at->addr));
+ at->family = AF_INET;
+ }
else if (req->ai_family == AF_INET6 && (req->ai_flags & AI_V4MAPPED))
{
- at->addr[3] = at->addr[0];
+ at->addr[3] = addr[0];
at->addr[2] = htonl (0xffff);
at->addr[1] = 0;
at->addr[0] = 0;
@@ -493,49 +496,62 @@ gaih_inet (const char *name, const struct gaih_service *service,
if (req->ai_flags & AI_CANONNAME)
canon = name;
+
+ goto process_list;
}
- else if (at->family == AF_UNSPEC)
+
+ char *scope_delim = strchr (name, SCOPE_DELIMITER);
+ int e;
+
+ if (scope_delim == NULL)
+ e = inet_pton (AF_INET6, name, addr);
+ else
+ e = __inet_pton_length (AF_INET6, name, scope_delim - name, addr);
+
+ if (e > 0)
{
- char *scope_delim = strchr (name, SCOPE_DELIMITER);
- int e;
- if (scope_delim == NULL)
- e = inet_pton (AF_INET6, name, at->addr);
+ at = alloca_account (sizeof (struct gaih_addrtuple),
+ alloca_used);
+ at->scopeid = 0;
+ at->next = NULL;
+
+ if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6)
+ {
+ memcpy (at->addr, addr, sizeof (at->addr));
+ at->family = AF_INET6;
+ }
+ else if (req->ai_family == AF_INET
+ && IN6_IS_ADDR_V4MAPPED (addr))
+ {
+ at->addr[0] = addr[3];
+ at->addr[1] = addr[1];
+ at->addr[2] = addr[2];
+ at->addr[3] = addr[3];
+ at->family = AF_INET;
+ }
else
- e = __inet_pton_length (AF_INET6, name, scope_delim - name,
- at->addr);
- if (e > 0)
{
- if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6)
- at->family = AF_INET6;
- else if (req->ai_family == AF_INET
- && IN6_IS_ADDR_V4MAPPED (at->addr))
- {
- at->addr[0] = at->addr[3];
- at->family = AF_INET;
- }
- else
- {
- result = -EAI_ADDRFAMILY;
- goto free_and_return;
- }
-
- if (scope_delim != NULL
- && __inet6_scopeid_pton ((struct in6_addr *) at->addr,
- scope_delim + 1,
- &at->scopeid) != 0)
- {
- result = -EAI_NONAME;
- goto free_and_return;
- }
+ result = -EAI_ADDRFAMILY;
+ goto free_and_return;
+ }
- if (req->ai_flags & AI_CANONNAME)
- canon = name;
+ if (scope_delim != NULL
+ && __inet6_scopeid_pton ((struct in6_addr *) at->addr,
+ scope_delim + 1,
+ &at->scopeid) != 0)
+ {
+ result = -EAI_NONAME;
+ goto free_and_return;
}
+
+ if (req->ai_flags & AI_CANONNAME)
+ canon = name;
+
+ goto process_list;
}
- if (at->family == AF_UNSPEC && (req->ai_flags & AI_NUMERICHOST) == 0)
+ if ((req->ai_flags & AI_NUMERICHOST) == 0)
{
- struct gaih_addrtuple **pat = &at;
int no_data = 0;
int no_inet6_data = 0;
nss_action_list nip;
@@ -543,6 +559,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
enum nss_status status = NSS_STATUS_UNAVAIL;
int no_more;
struct resolv_context *res_ctx = NULL;
+ bool do_merge = false;
/* If we do not have to look for IPv6 addresses or the canonical
name, use the simple, old functions, which do not support
@@ -579,7 +596,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
result = -EAI_MEMORY;
goto free_and_return;
}
- *pat = addrmem;
+ at = addrmem;
}
else
{
@@ -632,6 +649,8 @@ gaih_inet (const char *name, const struct gaih_service *service,
}
struct gaih_addrtuple *addrfree = addrmem;
+ struct gaih_addrtuple **pat = &at;
+
for (int i = 0; i < air->naddrs; ++i)
{
socklen_t size = (air->family[i] == AF_INET
@@ -695,12 +714,6 @@ gaih_inet (const char *name, const struct gaih_service *service,
free (air);
- if (at->family == AF_UNSPEC)
- {
- result = -EAI_NONAME;
- goto free_and_return;
- }
-
goto process_list;
}
else if (err == 0)
@@ -732,6 +745,22 @@ gaih_inet (const char *name, const struct gaih_service *service,
while (!no_more)
{
+ /* Always start afresh; continue should discard previous results
+ and the hosts database does not support merge. */
+ at = NULL;
+ free (canonbuf);
+ free (addrmem);
+ canon = canonbuf = NULL;
+ addrmem = NULL;
+ got_ipv6 = false;
+
+ if (do_merge)
+ {
+ __set_h_errno (NETDB_INTERNAL);
+ __set_errno (EBUSY);
+ break;
+ }
+
no_data = 0;
nss_gethostbyname4_r *fct4 = NULL;
@@ -744,12 +773,14 @@ gaih_inet (const char *name, const struct gaih_service *service,
{
while (1)
{
- status = DL_CALL_FCT (fct4, (name, pat,
+ status = DL_CALL_FCT (fct4, (name, &at,
tmpbuf->data, tmpbuf->length,
&errno, &h_errno,
NULL));
if (status == NSS_STATUS_SUCCESS)
break;
+ /* gethostbyname4_r may write into AT, so reset it. */
+ at = NULL;
if (status != NSS_STATUS_TRYAGAIN
|| errno != ERANGE || h_errno != NETDB_INTERNAL)
{
@@ -774,7 +805,9 @@ gaih_inet (const char *name, const struct gaih_service *service,
no_data = 1;
if ((req->ai_flags & AI_CANONNAME) != 0 && canon == NULL)
- canon = (*pat)->name;
+ canon = at->name;
+
+ struct gaih_addrtuple **pat = &at;
while (*pat != NULL)
{
@@ -826,6 +859,8 @@ gaih_inet (const char *name, const struct gaih_service *service,
if (fct != NULL)
{
+ struct gaih_addrtuple **pat = &at;
+
if (req->ai_family == AF_INET6
|| req->ai_family == AF_UNSPEC)
{
@@ -899,6 +934,10 @@ gaih_inet (const char *name, const struct gaih_service *service,
if (nss_next_action (nip, status) == NSS_ACTION_RETURN)
break;
+ /* The hosts database does not support MERGE. */
+ if (nss_next_action (nip, status) == NSS_ACTION_MERGE)
+ do_merge = true;
+
nip++;
if (nip->module == NULL)
no_more = -1;
@@ -930,7 +969,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
}
process_list:
- if (at->family == AF_UNSPEC)
+ if (at == NULL)
{
result = -EAI_NONAME;
goto free_and_return;
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-03 05:58:11 +0000