diff options
Diffstat (limited to 'nis/nss_nisplus/nisplus-ethers.c')
| -rw-r--r-- | nis/nss_nisplus/nisplus-ethers.c | 128 |
1 files changed, 75 insertions, 53 deletions
diff --git a/nis/nss_nisplus/nisplus-ethers.c b/nis/nss_nisplus/nisplus-ethers.c index 028309c..528ae88 100644 --- a/nis/nss_nisplus/nisplus-ethers.c +++ b/nis/nss_nisplus/nisplus-ethers.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1997,1998,2000,2001,2002,2003 Free Software Foundation, Inc. +/* Copyright (C) 1997,1998,2000-2003,2005 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997. @@ -17,15 +17,17 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ -#include <nss.h> -#include <errno.h> +#include <atomic.h> #include <ctype.h> -#include <string.h> -#include <bits/libc-lock.h> +#include <errno.h> +#include <inttypes.h> #include <netdb.h> +#include <nss.h> +#include <string.h> #include <netinet/ether.h> -#include <rpcsvc/nis.h> #include <netinet/if_ether.h> +#include <rpcsvc/nis.h> +#include <bits/libc-lock.h> #include "nss-nisplus.h" @@ -70,7 +72,14 @@ _nss_nisplus_parse_etherent (nis_result *result, struct etherent *ether, room_left -= (NISENTRYLEN (0, 0, result) +1); ether->e_name = p; - ether->e_addr = *ether_aton (NISENTRYVAL (0, 1, result)); + struct ether_addr *ea = ether_aton (NISENTRYVAL (0, 1, result)); + if (ea == NULL) + { + *errnop = EINVAL; + return -2; + } + + ether->e_addr = *ea; return 1; } @@ -80,18 +89,24 @@ _nss_create_tablename (int *errnop) { if (tablename_val == NULL) { - char buf [40 + strlen (nis_local_directory ())]; - char *p; + const char *local_dir = nis_local_directory (); + size_t local_dir_len = strlen (local_dir); + static const char prefix[] = "ethers.org_dir."; - p = __stpcpy (buf, "ethers.org_dir."); - p = __stpcpy (p, nis_local_directory ()); - tablename_val = __strdup (buf); + char *p = malloc (sizeof (prefix) + local_dir_len); if (tablename_val == NULL) { *errnop = errno; return NSS_STATUS_TRYAGAIN; } - tablename_len = strlen (tablename_val); + + memcpy (__stpcpy (p, prefix), local_dir, local_dir_len + 1); + + tablename_len = sizeof (prefix) - 1 + local_dir_len; + + atomic_write_barrier (); + + tablename_val = p; } return NSS_STATUS_SUCCESS; } @@ -107,9 +122,11 @@ _nss_nisplus_setetherent (int stayopen) __libc_lock_lock (lock); - if (result) - nis_freeresult (result); - result = NULL; + if (result != NULL) + { + nis_freeresult (result); + result = NULL; + } if (_nss_create_tablename (&err) != NSS_STATUS_SUCCESS) status = NSS_STATUS_UNAVAIL; @@ -124,9 +141,11 @@ _nss_nisplus_endetherent (void) { __libc_lock_lock (lock); - if (result) - nis_freeresult (result); - result = NULL; + if (result != NULL) + { + nis_freeresult (result); + result = NULL; + } __libc_lock_unlock (lock); @@ -178,7 +197,6 @@ internal_nisplus_getetherent_r (struct etherent *ether, char *buffer, if (parse_res == -1) { nis_freeresult (result); - *errnop = ERANGE; result = saved_result; return NSS_STATUS_TRYAGAIN; } @@ -258,7 +276,6 @@ _nss_nisplus_gethostton_r (const char *name, struct etherent *eth, if (parse_res == -1) { nis_freeresult (result); - *errnop = ERANGE; return NSS_STATUS_TRYAGAIN; } else @@ -275,8 +292,12 @@ _nss_nisplus_getntohost_r (const struct ether_addr *addr, { if (tablename_val == NULL) { + __libc_lock_lock (lock); + enum nss_status status = _nss_create_tablename (errnop); + __libc_lock_unlock (lock); + if (status != NSS_STATUS_SUCCESS) return status; } @@ -286,44 +307,45 @@ _nss_nisplus_getntohost_r (const struct ether_addr *addr, *errnop = EINVAL; return NSS_STATUS_UNAVAIL; } - else - { - int parse_res; - nis_result *result; - char buf[255 + tablename_len]; - sprintf (buf, "[addr=%x:%x:%x:%x:%x:%x],ethers.org_dir", - addr->ether_addr_octet[0], addr->ether_addr_octet[1], - addr->ether_addr_octet[2], addr->ether_addr_octet[3], - addr->ether_addr_octet[4], addr->ether_addr_octet[5]); + int parse_res; + char buf[26 + tablename_len]; - result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL); + snprintf (buf, sizeof (buf), + "[addr=%" PRIx8 ":%" PRIx8 ":%" PRIx8 ":%" PRIx8 ":%" PRIx8 + ":%" PRIx8 "],%s", + addr->ether_addr_octet[0], addr->ether_addr_octet[1], + addr->ether_addr_octet[2], addr->ether_addr_octet[3], + addr->ether_addr_octet[4], addr->ether_addr_octet[5], + tablename_val); - if (result == NULL) - { - *errnop = ENOMEM; - return NSS_STATUS_TRYAGAIN; - } - if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) + nis_result *result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL); + + if (result == NULL) + { + *errnop = ENOMEM; + return NSS_STATUS_TRYAGAIN; + } + + if (__builtin_expect (niserr2nss (result->status) != NSS_STATUS_SUCCESS, 0)) + { + enum nss_status status = niserr2nss (result->status); + nis_freeresult (result); + return status; + } + + parse_res = _nss_nisplus_parse_etherent (result, eth, buffer, + buflen, errnop); + if (__builtin_expect (parse_res < 1, 0)) + { + if (parse_res == -1) { - enum nss_status status = niserr2nss (result->status); nis_freeresult (result); - return status; + return NSS_STATUS_TRYAGAIN; } - parse_res = _nss_nisplus_parse_etherent (result, eth, buffer, - buflen, errnop); - if (parse_res < 1) - { - if (parse_res == -1) - { - nis_freeresult (result); - *errnop = ERANGE; - return NSS_STATUS_TRYAGAIN; - } - else - return NSS_STATUS_NOTFOUND; - } - return NSS_STATUS_SUCCESS; + return NSS_STATUS_NOTFOUND; } + + return NSS_STATUS_SUCCESS; } |