diff options
Diffstat (limited to 'nis/nss_nisplus/nisplus-ethers.c')
| -rw-r--r-- | nis/nss_nisplus/nisplus-ethers.c | 251 |
1 files changed, 140 insertions, 111 deletions
diff --git a/nis/nss_nisplus/nisplus-ethers.c b/nis/nss_nisplus/nisplus-ethers.c index 028309c841..298869f931 100644 --- a/nis/nss_nisplus/nisplus-ethers.c +++ b/nis/nss_nisplus/nisplus-ethers.c @@ -1,4 +1,5 @@ -/* Copyright (C) 1997,1998,2000,2001,2002,2003 Free Software Foundation, Inc. +/* Copyright (C) 1997,1998,2000-2003,2005,2006,2007 + Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997. @@ -17,15 +18,17 @@ 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" @@ -36,11 +39,11 @@ static nis_name tablename_val; static u_long tablename_len; -#define NISENTRYVAL(idx,col,res) \ - ((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val) +#define NISENTRYVAL(idx, col, res) \ + (NIS_RES_OBJECT (res)[idx].zo_data.objdata_u.en_data.en_cols.en_cols_val[col].ec_value.ec_value_val) -#define NISENTRYLEN(idx,col,res) \ - ((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len) +#define NISENTRYLEN(idx, col, res) \ + (NIS_RES_OBJECT (res)[idx].zo_data.objdata_u.en_data.en_cols.en_cols_val[col].ec_value.ec_value_len) static int _nss_nisplus_parse_etherent (nis_result *result, struct etherent *ether, @@ -53,7 +56,7 @@ _nss_nisplus_parse_etherent (nis_result *result, struct etherent *ether, return 0; if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS) - || result->objects.objects_len != 1 + || NIS_RES_NUMOBJ (result) != 1 || __type_of (NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ || strcmp (NIS_RES_OBJECT (result)->EN_data.en_type, "ethers_tbl") != 0 @@ -61,16 +64,25 @@ _nss_nisplus_parse_etherent (nis_result *result, struct etherent *ether, return 0; /* Generate the ether entry format and use the normal parser */ - if (NISENTRYLEN (0, 0, result) +1 > room_left) + if (NISENTRYLEN (0, 0, result) + 1 > room_left) { *errnop = ERANGE; return -1; } - strncpy (p, NISENTRYVAL (0, 0, result), NISENTRYLEN (0, 0, result)); - room_left -= (NISENTRYLEN (0, 0, result) +1); + char *cp = __stpncpy (p, NISENTRYVAL (0, 0, result), + NISENTRYLEN (0, 0, result)); + *cp = '\0'; + 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 +92,24 @@ _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); - if (tablename_val == NULL) + char *p = malloc (sizeof (prefix) + local_dir_len); + if (p == 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 +125,11 @@ _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 +144,11 @@ _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); @@ -137,8 +159,6 @@ static enum nss_status internal_nisplus_getetherent_r (struct etherent *ether, char *buffer, size_t buflen, int *errnop) { - int parse_res; - if (tablename_val == NULL) { enum nss_status status = _nss_create_tablename (errnop); @@ -148,6 +168,7 @@ internal_nisplus_getetherent_r (struct etherent *ether, char *buffer, } /* Get the next entry until we found a correct one. */ + int parse_res; do { nis_result *saved_result; @@ -156,16 +177,23 @@ internal_nisplus_getetherent_r (struct etherent *ether, char *buffer, { saved_result = NULL; result = nis_first_entry (tablename_val); + if (result == NULL) + { + *errnop = errno; + return NSS_STATUS_TRYAGAIN; + } if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) return niserr2nss (result->status); } else { - nis_result *res2; - - res2 = nis_next_entry(tablename_val, &result->cookie); saved_result = result; - result = res2; + result = nis_next_entry (tablename_val, &result->cookie); + if (result == NULL) + { + *errnop = errno; + return NSS_STATUS_TRYAGAIN; + } if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) { nis_freeresult (saved_result); @@ -178,17 +206,15 @@ 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; } - else - { - if (saved_result != NULL) - nis_freeresult (saved_result); - } - } while (!parse_res); + if (saved_result != NULL) + nis_freeresult (saved_result); + + } + while (!parse_res); return NSS_STATUS_SUCCESS; } @@ -212,8 +238,6 @@ enum nss_status _nss_nisplus_gethostton_r (const char *name, struct etherent *eth, char *buffer, size_t buflen, int *errnop) { - int parse_res; - if (tablename_val == NULL) { enum nss_status status = _nss_create_tablename (errnop); @@ -227,56 +251,59 @@ _nss_nisplus_gethostton_r (const char *name, struct etherent *eth, *errnop = EINVAL; return NSS_STATUS_UNAVAIL; } - else - { - nis_result *result; - char buf[strlen (name) + 40 + tablename_len]; - int olderr = errno; - sprintf (buf, "[name=%s],%s", name, tablename_val); + char buf[strlen (name) + 9 + tablename_len]; + int olderr = errno; - result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL); + snprintf (buf, sizeof (buf), "[name=%s],%s", name, tablename_val); - if (result == NULL) - { - *errnop = ENOMEM; - return NSS_STATUS_TRYAGAIN; - } - if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) - { - enum nss_status status = niserr2nss (result->status); - nis_freeresult (result); - return status; - } + nis_result *result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS | USE_DGRAM, + NULL, NULL); - parse_res = _nss_nisplus_parse_etherent (result, eth, buffer, + 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; + } + + int parse_res = _nss_nisplus_parse_etherent (result, eth, buffer, buflen, errnop); - if (parse_res < 1) - { - __set_errno (olderr); - if (parse_res == -1) - { - nis_freeresult (result); - *errnop = ERANGE; - return NSS_STATUS_TRYAGAIN; - } - else - return NSS_STATUS_NOTFOUND; - } - return NSS_STATUS_SUCCESS; + /* We do not need the lookup result anymore. */ + nis_freeresult (result); + + if (__builtin_expect (parse_res < 1, 0)) + { + __set_errno (olderr); + + if (parse_res == -1) + return NSS_STATUS_TRYAGAIN; + + return NSS_STATUS_NOTFOUND; } + + return NSS_STATUS_SUCCESS; } enum nss_status -_nss_nisplus_getntohost_r (const struct ether_addr *addr, - struct etherent *eth, +_nss_nisplus_getntohost_r (const struct ether_addr *addr, struct etherent *eth, char *buffer, size_t buflen, int *errnop) { 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 +313,46 @@ _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]); + 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) - { - enum nss_status status = niserr2nss (result->status); - nis_freeresult (result); - return status; - } + nis_result *result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS | USE_DGRAM, + 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, + int 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; + + /* We do not need the lookup result anymore. */ + nis_freeresult (result); + + if (__builtin_expect (parse_res < 1, 0)) + { + if (parse_res == -1) + return NSS_STATUS_TRYAGAIN; + + return NSS_STATUS_NOTFOUND; } + + return NSS_STATUS_SUCCESS; } |