2016-01-05 00:05:18 +08:00
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/* Copyright (C) 1998-2016 Free Software Foundation, Inc.
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1998-10-18 23:16:22 +08:00
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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The GNU C Library is free software; you can redistribute it and/or
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2001-07-06 12:58:11 +08:00
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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1998-10-18 23:16:22 +08:00
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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2001-07-06 12:58:11 +08:00
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Lesser General Public License for more details.
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1998-10-18 23:16:22 +08:00
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2001-07-06 12:58:11 +08:00
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You should have received a copy of the GNU Lesser General Public
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2012-02-10 07:18:22 +08:00
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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1998-10-18 23:16:22 +08:00
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#include <errno.h>
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#include <resolv.h>
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#include <stdio.h>
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#include <string.h>
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2013-05-01 23:46:34 +08:00
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#include <stdint.h>
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1998-10-18 23:16:22 +08:00
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#include <arpa/nameser.h>
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2004-06-06 14:06:02 +08:00
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#include <not-cancel.h>
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1998-10-18 23:16:22 +08:00
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1998-10-19 08:40:00 +08:00
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#include "nscd-client.h"
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1998-10-18 23:16:22 +08:00
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#include "nscd_proto.h"
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int __nss_not_use_nscd_hosts;
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static int nscd_gethst_r (const char *key, size_t keylen, request_type type,
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struct hostent *resultbuf, char *buffer,
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2004-02-27 08:55:39 +08:00
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size_t buflen, struct hostent **result,
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int *h_errnop) internal_function;
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1998-10-18 23:16:22 +08:00
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int
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__nscd_gethostbyname_r (const char *name, struct hostent *resultbuf,
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2004-02-27 08:55:39 +08:00
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char *buffer, size_t buflen, struct hostent **result,
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int *h_errnop)
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1998-10-18 23:16:22 +08:00
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{
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request_type reqtype;
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reqtype = (_res.options & RES_USE_INET6) ? GETHOSTBYNAMEv6 : GETHOSTBYNAME;
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return nscd_gethst_r (name, strlen (name) + 1, reqtype, resultbuf,
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2004-02-27 08:55:39 +08:00
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buffer, buflen, result, h_errnop);
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1998-10-18 23:16:22 +08:00
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}
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int
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__nscd_gethostbyname2_r (const char *name, int af, struct hostent *resultbuf,
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2004-02-27 08:55:39 +08:00
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char *buffer, size_t buflen, struct hostent **result,
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int *h_errnop)
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1998-10-18 23:16:22 +08:00
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{
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request_type reqtype;
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reqtype = af == AF_INET6 ? GETHOSTBYNAMEv6 : GETHOSTBYNAME;
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return nscd_gethst_r (name, strlen (name) + 1, reqtype, resultbuf,
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2004-02-27 08:55:39 +08:00
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buffer, buflen, result, h_errnop);
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1998-10-18 23:16:22 +08:00
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}
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int
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Update.
* conform/conformtest.pl (@headers): Add sys/utsname.h, sys/un.h,
sys/socket.h, spawn.h, netinet/tcp.h, netinet/in.h, net/if.h, and
arpa/inet.h.
* conform/data/fcntl.h-data: Add F_GETOWN, F_SETOWN,
SEEK_SET, SEEK_CUR, SEEK_END, S_IFMT, S_IFBLK, S_IFCHR, S_IFIFO,
S_IFREG, S_IFDIR, S_IFLNK, S_IFSOCK, S_IRWXU, S_IRUSR S_IWUSR,
S_IXUSR, S_IRWXG, S_IRGRP, S_IWGRP, S_IXGRP, S_IRWXO, S_IROTH,
S_IWOTH, S_IXOTH, S_ISUID, S_ISGID, S_ISVTX, POSIX_FADV_NORMAL,
POSIX_FADV_SEQUENTIAL, POSIX_FADV_RANDOM, POSIX_FADV_WILLNEED,
POSIX_FADV_DONTNEED, POSIX_FADV_NOREUSE, posix_fadvise,
posix_fallocate, and posix_madvise.
* conform/data/netdb.h-data: New file.
* conform/data/pthread.h-data: Add pthread_barrier_t,
pthread_barrierattr_t, pthread_barrier_destroy,
pthread_barrier_init, pthread_barrier_wait,
pthread_barrierattr_destroy, pthread_barrierattr_getpshared,
pthread_barrierattr_init, pthread_barrierattr_setpshared,
pthread_condattr_getclock, pthread_condattr_setclock,
pthread_getcpuclockid, pthread_mutex_timedlock,
pthread_rwlock_timedrdlock, pthread_rwlock_timedwrlock,
pthread_sigmask, pthread_spin_destroy, pthread_spin_init,
pthread_spin_lock, pthread_spin_trylock, and pthread_spin_unlock.
* conform/data/sched.h-data: Add sched_ss_low_priority,
sched_ss_repl_period, sched_ss_init_budget, sched_ss_max_repl, and
SCHED_SPORADIC.
* conform/data/semaphore.h-data: Add sem_timedwait.
* conform/data/signal.h-data: Add SIGIO.
* conform/data/spawn.h-data: New file.
* conform/data/stdlib.h-data: Add posix_memalign, setenv, and unsetenv.
* conform/data/time.h-data: Add CLOCK_PROCESS_CPUTIME_ID,
CLOCK_THREAD_CPUTIME_ID, clock_getcpuclockid, and clock_nanosleep.
Fix typo in gmtime_r definition.
* conform/data/unistd.h-data: Add _POSIX_ADVISORY_INFO,
_POSIX_ASYNCHRONOUS_IO, _POSIX_BARRIERS, _POSIX_MONOTONIC_CLOCK,
_POSIX_READER_WRITER_LOCKS, _POSIX_SHELL, _POSIX_SPAWN,
_POSIX_SPIN_LOCKS, _POSIX_SPORADIC_SERVER, _POSIX_THREAD_CPUTIME,
_POSIX_TYPED_MEMORY_OBJECTS, _POSIX_THREAD_SPORADIC_SERVER,
_XOPEN_STREAMS, _POSIX_TIMEOUTS, _POSIX2_PBS,
_POSIX2_PBS_ACCOUNTING, _POSIX2_PBS_CHECKPOINT,
_POSIX2_PBS_LOCATE, _POSIX2_PBS_MESSAGE, _POSIX2_PBS_TRACK,
_SC_2_PBS, _SC_2_PBS_ACCOUNTING, _SC_2_PBS_CHECKPOINT,
_SC_2_PBS_LOCATE, _SC_2_PBS_MESSAGE, _SC_2_PBS_TRACK,
_SC_BARRIERS, _SC_BASE, _SC_CLOCK_SELECTION, _SC_DEVICE_IO,
_SC_DEVICE_SPECIFIC, _SC_DEVICE_SPECIFIC_R, _SC_FD_MGMT, _SC_FIFO,
_SC_FILE_ATTRIBUTES, _SC_FILE_LOCKING, _SC_FILE_SYSTEM,
_SC_MEMORY_PROTECTION, _SC_MESSAGE_PASSING, _SC_MONOTONIC_CLOCK,
_SC_MESSAGE_PASSING, _SC_MONOTONIC_CLOCK, _SC_MULTIPLE_PROCESS,
_SC_NETWORKING, _SC_PIPE, _SC_READER_WRITER_LOCKS, _SC_REGEXP,
_SC_SHELL, _SC_SIGNALS, _SC_SINGLE_PROCESS, _SC_SPIN_LOCKS,
_SC_TYPED_MEMORY_OBJECTS, _SC_USER_GROUPS, _SC_USER_GROUPS_R,
_SC_STREAMS, _PC_REC_INCR_XFER_SIZE, _PC_REC_MAX_XFER_SIZE,
_PC_REC_MIN_XFER_SIZE, _PC_REC_XFER_ALIGN, setegid, seteuid. Fix
typo in off_t definition.
* conform/data/net/if.h-data: New file.
* conform/data/netinet/in.h-data: New file.
* conform/data/netinet/tcp.h-data: New file.
* conform/data/sys/mman.h-data: Add POSIX_MADV_NORMAL,
POSIX_MADV_SEQUENTIAL, POSIX_MADV_RANDOM, POSIX_MADV_WILLNEED,
POSIX_MADV_DONTNEED, POSIX_TYPED_MEM_ALLOCATE,
POSIX_TYPED_MEM_ALLOCATE_CONTIG, POSIX_TYPED_MEM_MAP_ALLOCATABLE,
posix_typedmem_info, posix_mem_offset, posix_typed_mem_get_info,
and posix_typed_mem_open.
* conform/data/sys/socket.h-data: New file.
* conform/data/sys/stat.h-data: Add S_TYPEISTMO and isfdtype.
* conform/data/sys/types.h-data: Add pthread_barrier_t,
pthread_barrierattr_t, and pthread_spinlock_t.
* conform/data/sys/un.h-data: New file.
* conform/data/sys/utsname.h-data: New file.
* include/netdb.h (__gethostbyaddr_r): Fix types of first and second
parameter.
* inet/gethstbyad.c (gethostbyname): Likewise.
* inet/gethstbyad_t.c (gethostbyname_r): Likewise.
* inet/getipnodebyad.c (getipnodebyad): Likewise.
* nis/nss_nis/nis-hosts.c (_nss_nis_gethostbyaddr_r): Likewise.
* nis/nss_nisplus/nisplus-hosts.c (_nss_nisplus_gethostbyaddr_r):
Likewise.
* nscd/gethstbyad_r.c (gethostbyaddr_r): Likewise.
* nscd/nscd_gethst_r.c (__nscd_gethostbyaddr_r): Likewise.
* nscd/nscd_proto.h (__nscd_gethostbyaddr_r): Likewise.
* nss/nss_files/files-hosts.c (_nss_files_gethostbyaddr_r): Likewise.
* resolv/gethnamaddr.c (gethostbyname): Likewise.
* resolv/netdb.h (struct hostent): Fix type of h_length member.
(gethostbyaddr, getipnodebyaddr, gethostbyaddr_r): Fix types of first
and second parameter.
2000-04-29 Andreas Jaeger <aj@suse.de>
* conform/data/arpa/inet.h-data: New file.
2000-04-30 12:17:35 +08:00
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__nscd_gethostbyaddr_r (const void *addr, socklen_t len, int type,
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1998-10-18 23:16:22 +08:00
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struct hostent *resultbuf, char *buffer, size_t buflen,
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2004-02-27 08:55:39 +08:00
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struct hostent **result, int *h_errnop)
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1998-10-18 23:16:22 +08:00
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{
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request_type reqtype;
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if (!((len == INADDRSZ && type == AF_INET)
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|| (len == IN6ADDRSZ && type == AF_INET6)))
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/* LEN and TYPE do not match. */
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1999-06-17 20:33:08 +08:00
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return -1;
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1998-10-18 23:16:22 +08:00
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reqtype = type == AF_INET6 ? GETHOSTBYADDRv6 : GETHOSTBYADDR;
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2004-02-27 08:55:39 +08:00
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return nscd_gethst_r (addr, len, reqtype, resultbuf, buffer, buflen, result,
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1998-10-18 23:16:22 +08:00
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h_errnop);
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}
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2006-05-16 04:46:12 +08:00
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libc_locked_map_ptr (, __hst_map_handle) attribute_hidden;
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2004-09-08 23:46:42 +08:00
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/* Note that we only free the structure if necessary. The memory
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mapping is not removed since it is not visible to the malloc
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handling. */
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2004-11-10 15:54:40 +08:00
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libc_freeres_fn (hst_map_free)
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1998-10-18 23:16:22 +08:00
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{
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2004-11-10 15:54:40 +08:00
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if (__hst_map_handle.mapped != NO_MAPPING)
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{
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void *p = __hst_map_handle.mapped;
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__hst_map_handle.mapped = NO_MAPPING;
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free (p);
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}
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1998-10-18 23:16:22 +08:00
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}
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2011-10-31 13:51:16 +08:00
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uint32_t
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__nscd_get_nl_timestamp (void)
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{
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2012-05-16 02:35:53 +08:00
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uint32_t retval;
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2011-10-31 13:51:16 +08:00
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if (__nss_not_use_nscd_hosts != 0)
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return 0;
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2012-05-16 02:35:53 +08:00
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/* __nscd_get_mapping can change hst_map_handle.mapped to NO_MAPPING.
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However, __nscd_get_mapping assumes the prior value was not NO_MAPPING.
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Thus we have to acquire the lock to prevent this thread from changing
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hst_map_handle.mapped to NO_MAPPING while another thread is inside
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__nscd_get_mapping. */
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if (!__nscd_acquire_maplock (&__hst_map_handle))
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return 0;
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2011-10-31 13:51:16 +08:00
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struct mapped_database *map = __hst_map_handle.mapped;
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if (map == NULL
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|| (map != NO_MAPPING
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&& map->head->nscd_certainly_running == 0
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&& map->head->timestamp + MAPPING_TIMEOUT < time (NULL)))
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map = __nscd_get_mapping (GETFDHST, "hosts", &__hst_map_handle.mapped);
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if (map == NO_MAPPING)
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2012-05-16 02:35:53 +08:00
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retval = 0;
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else
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retval = map->head->extra_data[NSCD_HST_IDX_CONF_TIMESTAMP];
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/* Release the lock. */
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__hst_map_handle.lock = 0;
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2011-10-31 13:51:16 +08:00
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2012-05-16 02:35:53 +08:00
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return retval;
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2011-10-31 13:51:16 +08:00
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}
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2008-12-30 04:56:13 +08:00
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int __nss_have_localdomain attribute_hidden;
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1998-10-18 23:16:22 +08:00
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static int
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1999-02-03 00:27:57 +08:00
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internal_function
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1998-10-18 23:16:22 +08:00
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nscd_gethst_r (const char *key, size_t keylen, request_type type,
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struct hostent *resultbuf, char *buffer, size_t buflen,
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2004-02-27 08:55:39 +08:00
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struct hostent **result, int *h_errnop)
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1998-10-18 23:16:22 +08:00
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{
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2014-02-10 21:45:42 +08:00
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if (__glibc_unlikely (__nss_have_localdomain >= 0))
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2008-12-30 04:56:13 +08:00
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{
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if (__nss_have_localdomain == 0)
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__nss_have_localdomain = getenv ("LOCALDOMAIN") != NULL ? 1 : -1;
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if (__nss_have_localdomain > 0)
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{
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__nss_not_use_nscd_hosts = 1;
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return -1;
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}
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}
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2004-09-30 16:08:40 +08:00
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int gc_cycle;
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int nretries = 0;
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/* If the mapping is available, try to search there instead of
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communicating with the nscd. */
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struct mapped_database *mapped;
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2004-11-10 15:54:40 +08:00
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mapped = __nscd_get_map_ref (GETFDHST, "hosts", &__hst_map_handle,
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&gc_cycle);
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2004-09-30 16:08:40 +08:00
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retry:;
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2004-09-08 23:46:42 +08:00
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const char *h_name = NULL;
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const uint32_t *aliases_len = NULL;
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const char *addr_list = NULL;
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size_t addr_list_len = 0;
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int retval = -1;
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const char *recend = (const char *) ~UINTMAX_C (0);
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int sock = -1;
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2007-01-31 17:14:21 +08:00
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hst_response_header hst_resp;
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2004-09-30 13:16:40 +08:00
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if (mapped != NO_MAPPING)
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1998-10-18 23:16:22 +08:00
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{
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2007-01-31 17:14:21 +08:00
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/* No const qualifier, as it can change during garbage collection. */
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2009-05-16 12:17:08 +08:00
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struct datahead *found = __nscd_cache_search (type, key, keylen, mapped,
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sizeof hst_resp);
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2004-09-08 23:46:42 +08:00
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if (found != NULL)
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{
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2007-01-31 17:14:21 +08:00
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h_name = (char *) (&found->data[0].hstdata + 1);
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hst_resp = found->data[0].hstdata;
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aliases_len = (uint32_t *) (h_name + hst_resp.h_name_len);
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2004-09-08 23:46:42 +08:00
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addr_list = ((char *) aliases_len
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2007-01-31 17:14:21 +08:00
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+ hst_resp.h_aliases_cnt * sizeof (uint32_t));
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addr_list_len = hst_resp.h_addr_list_cnt * INADDRSZ;
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recend = (const char *) found->data + found->recsize;
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/* Now check if we can trust hst_resp fields. If GC is
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in progress, it can contain anything. */
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if (mapped->head->gc_cycle != gc_cycle)
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{
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retval = -2;
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goto out;
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}
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2004-09-08 23:46:42 +08:00
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2014-03-27 04:37:35 +08:00
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#if !_STRING_ARCH_unaligned
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2004-09-08 23:46:42 +08:00
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/* The aliases_len array in the mapped database might very
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well be unaligned. We will access it word-wise so on
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platforms which do not tolerate unaligned accesses we
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need to make an aligned copy. */
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if (((uintptr_t) aliases_len & (__alignof__ (*aliases_len) - 1))
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!= 0)
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{
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2007-01-31 17:14:21 +08:00
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uint32_t *tmp = alloca (hst_resp.h_aliases_cnt
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2004-09-08 23:46:42 +08:00
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* sizeof (uint32_t));
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aliases_len = memcpy (tmp, aliases_len,
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2007-01-31 17:14:21 +08:00
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hst_resp.h_aliases_cnt
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2004-09-08 23:46:42 +08:00
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* sizeof (uint32_t));
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}
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#endif
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if (type != GETHOSTBYADDR && type != GETHOSTBYNAME)
|
|
|
|
{
|
2007-01-31 17:14:21 +08:00
|
|
|
if (hst_resp.h_length == INADDRSZ)
|
2004-09-08 23:46:42 +08:00
|
|
|
addr_list += addr_list_len;
|
2007-01-31 17:14:21 +08:00
|
|
|
addr_list_len = hst_resp.h_addr_list_cnt * IN6ADDRSZ;
|
2004-09-08 23:46:42 +08:00
|
|
|
}
|
|
|
|
if (__builtin_expect ((const char *) addr_list + addr_list_len
|
|
|
|
> recend, 0))
|
2007-01-31 17:14:21 +08:00
|
|
|
goto out;
|
2004-09-08 23:46:42 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2007-01-31 17:14:21 +08:00
|
|
|
if (h_name == NULL)
|
2004-09-08 23:46:42 +08:00
|
|
|
{
|
2007-01-31 17:14:21 +08:00
|
|
|
sock = __nscd_open_socket (key, keylen, type, &hst_resp,
|
|
|
|
sizeof (hst_resp));
|
2004-09-08 23:46:42 +08:00
|
|
|
if (sock == -1)
|
|
|
|
{
|
|
|
|
__nss_not_use_nscd_hosts = 1;
|
2007-01-13 15:30:26 +08:00
|
|
|
goto out;
|
2004-09-08 23:46:42 +08:00
|
|
|
}
|
1998-10-18 23:16:22 +08:00
|
|
|
}
|
|
|
|
|
2004-03-02 06:35:28 +08:00
|
|
|
/* No value found so far. */
|
|
|
|
*result = NULL;
|
|
|
|
|
2014-02-10 21:45:42 +08:00
|
|
|
if (__glibc_unlikely (hst_resp.found == -1))
|
1998-10-18 23:16:22 +08:00
|
|
|
{
|
|
|
|
/* The daemon does not cache this database. */
|
|
|
|
__nss_not_use_nscd_hosts = 1;
|
2004-09-08 23:46:42 +08:00
|
|
|
goto out_close;
|
1998-10-18 23:16:22 +08:00
|
|
|
}
|
|
|
|
|
2007-01-31 17:14:21 +08:00
|
|
|
if (hst_resp.found == 1)
|
1998-10-18 23:16:22 +08:00
|
|
|
{
|
|
|
|
char *cp = buffer;
|
1999-06-02 19:05:06 +08:00
|
|
|
uintptr_t align1;
|
|
|
|
uintptr_t align2;
|
1998-10-18 23:16:22 +08:00
|
|
|
size_t total_len;
|
|
|
|
ssize_t cnt;
|
|
|
|
char *ignore;
|
|
|
|
int n;
|
|
|
|
|
2000-02-22 17:00:35 +08:00
|
|
|
/* A first check whether the buffer is sufficiently large is possible. */
|
1998-10-18 23:16:22 +08:00
|
|
|
/* Now allocate the buffer the array for the group members. We must
|
1999-06-02 19:05:06 +08:00
|
|
|
align the pointer and the base of the h_addr_list pointers. */
|
|
|
|
align1 = ((__alignof__ (char *) - (cp - ((char *) 0)))
|
|
|
|
& (__alignof__ (char *) - 1));
|
2007-01-31 17:14:21 +08:00
|
|
|
align2 = ((__alignof__ (char *) - ((cp + align1 + hst_resp.h_name_len)
|
1999-06-02 19:05:06 +08:00
|
|
|
- ((char *) 0)))
|
|
|
|
& (__alignof__ (char *) - 1));
|
2007-01-31 17:14:21 +08:00
|
|
|
if (buflen < (align1 + hst_resp.h_name_len + align2
|
|
|
|
+ ((hst_resp.h_aliases_cnt + hst_resp.h_addr_list_cnt
|
2004-09-08 23:46:42 +08:00
|
|
|
+ 2)
|
1998-10-18 23:16:22 +08:00
|
|
|
* sizeof (char *))
|
2007-01-31 17:14:21 +08:00
|
|
|
+ hst_resp.h_addr_list_cnt * (type == AF_INET
|
|
|
|
? INADDRSZ : IN6ADDRSZ)))
|
1998-10-18 23:16:22 +08:00
|
|
|
{
|
|
|
|
no_room:
|
2005-02-22 07:43:21 +08:00
|
|
|
*h_errnop = NETDB_INTERNAL;
|
1998-10-18 23:16:22 +08:00
|
|
|
__set_errno (ERANGE);
|
2004-02-27 08:55:39 +08:00
|
|
|
retval = ERANGE;
|
2004-09-08 23:46:42 +08:00
|
|
|
goto out_close;
|
1998-10-18 23:16:22 +08:00
|
|
|
}
|
1999-06-02 19:05:06 +08:00
|
|
|
cp += align1;
|
1998-10-18 23:16:22 +08:00
|
|
|
|
|
|
|
/* Prepare the result as far as we can. */
|
|
|
|
resultbuf->h_aliases = (char **) cp;
|
2007-01-31 17:14:21 +08:00
|
|
|
cp += (hst_resp.h_aliases_cnt + 1) * sizeof (char *);
|
1998-10-18 23:16:22 +08:00
|
|
|
resultbuf->h_addr_list = (char **) cp;
|
2007-01-31 17:14:21 +08:00
|
|
|
cp += (hst_resp.h_addr_list_cnt + 1) * sizeof (char *);
|
1998-10-18 23:16:22 +08:00
|
|
|
|
|
|
|
resultbuf->h_name = cp;
|
2007-01-31 17:14:21 +08:00
|
|
|
cp += hst_resp.h_name_len + align2;
|
1998-10-18 23:16:22 +08:00
|
|
|
|
|
|
|
if (type == GETHOSTBYADDR || type == GETHOSTBYNAME)
|
|
|
|
{
|
|
|
|
resultbuf->h_addrtype = AF_INET;
|
|
|
|
resultbuf->h_length = INADDRSZ;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2004-09-08 23:46:42 +08:00
|
|
|
resultbuf->h_addrtype = AF_INET6;
|
|
|
|
resultbuf->h_length = IN6ADDRSZ;
|
|
|
|
}
|
2007-01-31 17:14:21 +08:00
|
|
|
for (cnt = 0; cnt < hst_resp.h_addr_list_cnt; ++cnt)
|
2004-09-08 23:46:42 +08:00
|
|
|
{
|
|
|
|
resultbuf->h_addr_list[cnt] = cp;
|
|
|
|
cp += resultbuf->h_length;
|
|
|
|
}
|
|
|
|
resultbuf->h_addr_list[cnt] = NULL;
|
1998-10-18 23:16:22 +08:00
|
|
|
|
2004-09-08 23:46:42 +08:00
|
|
|
if (h_name == NULL)
|
|
|
|
{
|
2007-01-13 15:30:26 +08:00
|
|
|
struct iovec vec[4];
|
|
|
|
|
2004-09-08 23:46:42 +08:00
|
|
|
vec[0].iov_base = resultbuf->h_name;
|
2007-01-31 17:14:21 +08:00
|
|
|
vec[0].iov_len = hst_resp.h_name_len;
|
|
|
|
total_len = hst_resp.h_name_len;
|
2004-09-08 23:46:42 +08:00
|
|
|
n = 1;
|
1998-10-18 23:16:22 +08:00
|
|
|
|
2007-01-31 17:14:21 +08:00
|
|
|
if (hst_resp.h_aliases_cnt > 0)
|
2004-09-08 23:46:42 +08:00
|
|
|
{
|
2007-01-31 17:14:21 +08:00
|
|
|
aliases_len = alloca (hst_resp.h_aliases_cnt
|
2004-09-08 23:46:42 +08:00
|
|
|
* sizeof (uint32_t));
|
|
|
|
vec[n].iov_base = (void *) aliases_len;
|
2007-01-31 17:14:21 +08:00
|
|
|
vec[n].iov_len = hst_resp.h_aliases_cnt * sizeof (uint32_t);
|
1998-10-18 23:16:22 +08:00
|
|
|
|
2007-01-31 17:14:21 +08:00
|
|
|
total_len += hst_resp.h_aliases_cnt * sizeof (uint32_t);
|
2004-09-08 23:46:42 +08:00
|
|
|
++n;
|
|
|
|
}
|
1998-10-18 23:16:22 +08:00
|
|
|
|
2004-09-08 23:46:42 +08:00
|
|
|
if (type == GETHOSTBYADDR || type == GETHOSTBYNAME)
|
1998-10-18 23:16:22 +08:00
|
|
|
{
|
2004-09-08 23:46:42 +08:00
|
|
|
vec[n].iov_base = resultbuf->h_addr_list[0];
|
2007-01-31 17:14:21 +08:00
|
|
|
vec[n].iov_len = hst_resp.h_addr_list_cnt * INADDRSZ;
|
2004-09-08 23:46:42 +08:00
|
|
|
|
2007-01-31 17:14:21 +08:00
|
|
|
total_len += hst_resp.h_addr_list_cnt * INADDRSZ;
|
2004-09-08 23:46:42 +08:00
|
|
|
|
|
|
|
++n;
|
1998-10-18 23:16:22 +08:00
|
|
|
}
|
2004-09-08 23:46:42 +08:00
|
|
|
else
|
|
|
|
{
|
2007-01-31 17:14:21 +08:00
|
|
|
if (hst_resp.h_length == INADDRSZ)
|
2004-09-08 23:46:42 +08:00
|
|
|
{
|
2007-01-31 17:14:21 +08:00
|
|
|
ignore = alloca (hst_resp.h_addr_list_cnt * INADDRSZ);
|
2004-09-08 23:46:42 +08:00
|
|
|
vec[n].iov_base = ignore;
|
2007-01-31 17:14:21 +08:00
|
|
|
vec[n].iov_len = hst_resp.h_addr_list_cnt * INADDRSZ;
|
1998-10-18 23:16:22 +08:00
|
|
|
|
2007-01-31 17:14:21 +08:00
|
|
|
total_len += hst_resp.h_addr_list_cnt * INADDRSZ;
|
1998-10-18 23:16:22 +08:00
|
|
|
|
2004-09-08 23:46:42 +08:00
|
|
|
++n;
|
|
|
|
}
|
1998-10-18 23:16:22 +08:00
|
|
|
|
2004-09-08 23:46:42 +08:00
|
|
|
vec[n].iov_base = resultbuf->h_addr_list[0];
|
2007-01-31 17:14:21 +08:00
|
|
|
vec[n].iov_len = hst_resp.h_addr_list_cnt * IN6ADDRSZ;
|
1998-10-18 23:16:22 +08:00
|
|
|
|
2007-01-31 17:14:21 +08:00
|
|
|
total_len += hst_resp.h_addr_list_cnt * IN6ADDRSZ;
|
2004-09-08 23:46:42 +08:00
|
|
|
|
|
|
|
++n;
|
|
|
|
}
|
|
|
|
|
2005-02-23 06:58:32 +08:00
|
|
|
if ((size_t) __readvall (sock, vec, n) != total_len)
|
2004-09-08 23:46:42 +08:00
|
|
|
goto out_close;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2007-01-31 17:14:21 +08:00
|
|
|
memcpy (resultbuf->h_name, h_name, hst_resp.h_name_len);
|
2004-09-08 23:46:42 +08:00
|
|
|
memcpy (resultbuf->h_addr_list[0], addr_list, addr_list_len);
|
|
|
|
}
|
1998-10-18 23:16:22 +08:00
|
|
|
|
|
|
|
/* Now we also can read the aliases. */
|
|
|
|
total_len = 0;
|
2007-01-31 17:14:21 +08:00
|
|
|
for (cnt = 0; cnt < hst_resp.h_aliases_cnt; ++cnt)
|
1998-10-18 23:16:22 +08:00
|
|
|
{
|
|
|
|
resultbuf->h_aliases[cnt] = cp;
|
|
|
|
cp += aliases_len[cnt];
|
|
|
|
total_len += aliases_len[cnt];
|
|
|
|
}
|
|
|
|
resultbuf->h_aliases[cnt] = NULL;
|
|
|
|
|
2004-09-08 23:46:42 +08:00
|
|
|
if (__builtin_expect ((const char *) addr_list + addr_list_len
|
|
|
|
+ total_len > recend, 0))
|
2007-01-31 17:14:21 +08:00
|
|
|
{
|
|
|
|
/* aliases_len array might contain garbage during nscd GC cycle,
|
|
|
|
retry rather than fail in that case. */
|
|
|
|
if (addr_list != NULL && mapped->head->gc_cycle != gc_cycle)
|
|
|
|
retval = -2;
|
|
|
|
goto out_close;
|
|
|
|
}
|
1998-10-18 23:16:22 +08:00
|
|
|
/* See whether this would exceed the buffer capacity. */
|
2014-02-10 21:45:42 +08:00
|
|
|
if (__glibc_unlikely (cp > buffer + buflen))
|
2007-01-31 17:14:21 +08:00
|
|
|
{
|
|
|
|
/* aliases_len array might contain garbage during nscd GC cycle,
|
|
|
|
retry rather than fail in that case. */
|
|
|
|
if (addr_list != NULL && mapped->head->gc_cycle != gc_cycle)
|
|
|
|
{
|
|
|
|
retval = -2;
|
|
|
|
goto out_close;
|
|
|
|
}
|
|
|
|
goto no_room;
|
|
|
|
}
|
1998-10-18 23:16:22 +08:00
|
|
|
|
|
|
|
/* And finally read the aliases. */
|
2004-09-08 23:46:42 +08:00
|
|
|
if (addr_list == NULL)
|
|
|
|
{
|
2005-11-20 01:09:03 +08:00
|
|
|
if (total_len == 0
|
|
|
|
|| ((size_t) __readall (sock, resultbuf->h_aliases[0], total_len)
|
|
|
|
== total_len))
|
2004-09-08 23:46:42 +08:00
|
|
|
{
|
|
|
|
retval = 0;
|
|
|
|
*result = resultbuf;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
2004-02-27 08:55:39 +08:00
|
|
|
{
|
2004-09-08 23:46:42 +08:00
|
|
|
memcpy (resultbuf->h_aliases[0],
|
|
|
|
(const char *) addr_list + addr_list_len, total_len);
|
|
|
|
|
2004-11-10 15:50:03 +08:00
|
|
|
/* Try to detect corrupt databases. */
|
2007-01-31 17:14:21 +08:00
|
|
|
if (resultbuf->h_name[hst_resp.h_name_len - 1] != '\0'
|
|
|
|
|| ({for (cnt = 0; cnt < hst_resp.h_aliases_cnt; ++cnt)
|
2004-11-10 15:50:03 +08:00
|
|
|
if (resultbuf->h_aliases[cnt][aliases_len[cnt] - 1]
|
|
|
|
!= '\0')
|
|
|
|
break;
|
2007-01-31 17:14:21 +08:00
|
|
|
cnt < hst_resp.h_aliases_cnt; }))
|
|
|
|
{
|
|
|
|
/* We cannot use the database. */
|
|
|
|
if (mapped->head->gc_cycle != gc_cycle)
|
|
|
|
retval = -2;
|
|
|
|
goto out_close;
|
|
|
|
}
|
2004-11-10 15:50:03 +08:00
|
|
|
|
2004-02-27 08:55:39 +08:00
|
|
|
retval = 0;
|
|
|
|
*result = resultbuf;
|
|
|
|
}
|
1998-10-18 23:16:22 +08:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Store the error number. */
|
2007-01-31 17:14:21 +08:00
|
|
|
*h_errnop = hst_resp.error;
|
1998-10-18 23:16:22 +08:00
|
|
|
|
2007-10-14 07:04:40 +08:00
|
|
|
/* Set errno to 0 to indicate no error, just no found record. */
|
|
|
|
__set_errno (0);
|
2004-02-27 08:55:39 +08:00
|
|
|
/* Even though we have not found anything, the result is zero. */
|
|
|
|
retval = 0;
|
1998-10-18 23:16:22 +08:00
|
|
|
}
|
2003-04-28 16:17:29 +08:00
|
|
|
|
2004-09-08 23:46:42 +08:00
|
|
|
out_close:
|
|
|
|
if (sock != -1)
|
|
|
|
close_not_cancel_no_status (sock);
|
2003-04-28 16:17:29 +08:00
|
|
|
out:
|
2007-01-31 17:14:21 +08:00
|
|
|
if (__nscd_drop_map_ref (mapped, &gc_cycle) != 0)
|
2004-09-30 16:08:40 +08:00
|
|
|
{
|
|
|
|
/* When we come here this means there has been a GC cycle while we
|
|
|
|
were looking for the data. This means the data might have been
|
|
|
|
inconsistent. Retry if possible. */
|
2007-01-31 17:14:21 +08:00
|
|
|
if ((gc_cycle & 1) != 0 || ++nretries == 5 || retval == -1)
|
2004-09-30 16:08:40 +08:00
|
|
|
{
|
|
|
|
/* nscd is just running gc now. Disable using the mapping. */
|
2007-01-31 17:14:21 +08:00
|
|
|
if (atomic_decrement_val (&mapped->counter) == 0)
|
|
|
|
__nscd_unmap (mapped);
|
2004-09-30 16:08:40 +08:00
|
|
|
mapped = NO_MAPPING;
|
|
|
|
}
|
|
|
|
|
2007-01-31 17:14:21 +08:00
|
|
|
if (retval != -1)
|
|
|
|
goto retry;
|
2004-09-30 16:08:40 +08:00
|
|
|
}
|
2003-04-28 16:17:29 +08:00
|
|
|
|
2004-02-27 08:55:39 +08:00
|
|
|
return retval;
|
1998-10-18 23:16:22 +08:00
|
|
|
}
|