diff options
| -rw-r--r-- | nss/Makefile | 3 | ||||
| -rw-r--r-- | nss/tst-nss-gai-actions.c | 149 | ||||
| -rw-r--r-- | nss/tst-nss-gai-actions.root/etc/host.conf | 1 | ||||
| -rw-r--r-- | nss/tst-nss-gai-actions.root/etc/hosts | 508 | ||||
| -rw-r--r-- | sysdeps/posix/getaddrinfo.c | 143 |
5 files changed, 751 insertions, 53 deletions
diff --git a/nss/Makefile b/nss/Makefile index 716bc8f6ef..2908c21be2 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 +192.0.0.2 example.org +192.0.0.3 example.org 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+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 43dfc6739e..f391dc0a59 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; |