diff options
Diffstat (limited to 'nis/nss_nisplus/nisplus-network.c')
| -rw-r--r-- | nis/nss_nisplus/nisplus-network.c | 215 |
1 files changed, 118 insertions, 97 deletions
diff --git a/nis/nss_nisplus/nisplus-network.c b/nis/nss_nisplus/nisplus-network.c index 422b02b82a..1cd7cf2588 100644 --- a/nis/nss_nisplus/nisplus-network.c +++ b/nis/nss_nisplus/nisplus-network.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@vt.uni-paderborn.de>, 1997. @@ -17,15 +17,16 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ -#include <nss.h> -#include <netdb.h> -#include <errno.h> +#include <atomic.h> #include <ctype.h> +#include <errno.h> +#include <netdb.h> +#include <nss.h> #include <stdint.h> #include <string.h> #include <arpa/inet.h> -#include <bits/libc-lock.h> #include <rpcsvc/nis.h> +#include <bits/libc-lock.h> #include "nss-nisplus.h" @@ -44,12 +45,10 @@ static u_long tablename_len; static int _nss_nisplus_parse_netent (nis_result *result, struct netent *network, - char *buffer, size_t buflen, int *errnop) + char *buffer, size_t buflen, int *errnop) { char *first_unused = buffer; size_t room_left = buflen; - unsigned int i; - char *p, *line; if (result == NULL) return 0; @@ -61,7 +60,7 @@ _nss_nisplus_parse_netent (nis_result *result, struct netent *network, || result->objects.objects_val[0].EN_data.en_cols.en_cols_len < 3) return 0; - if (NISENTRYLEN(0, 0, result) >= room_left) + if (NISENTRYLEN (0, 0, result) >= room_left) { /* The line is too long for our buffer. */ no_more_room: @@ -69,7 +68,7 @@ _nss_nisplus_parse_netent (nis_result *result, struct netent *network, return -1; } - strncpy (first_unused, NISENTRYVAL(0, 0, result), + strncpy (first_unused, NISENTRYVAL (0, 0, result), NISENTRYLEN (0, 0, result)); first_unused[NISENTRYLEN (0, 0, result)] = '\0'; network->n_name = first_unused; @@ -77,10 +76,10 @@ _nss_nisplus_parse_netent (nis_result *result, struct netent *network, first_unused += strlen (first_unused) +1; network->n_addrtype = 0; network->n_net = inet_network (NISENTRYVAL (0, 2, result)); - p = first_unused; + char *p = first_unused; - line = p; - for (i = 0; i < result->objects.objects_len; ++i) + char *line = p; + for (unsigned int i = 0; i < result->objects.objects_len; ++i) { if (strcmp (NISENTRYVAL (i, 1, result), network->n_name) != 0) { @@ -107,12 +106,12 @@ _nss_nisplus_parse_netent (nis_result *result, struct netent *network, room_left -= (2 * sizeof (char *)); network->n_aliases[0] = NULL; - i = 0; + unsigned int i = 0; while (*line != '\0') { /* Skip leading blanks. */ while (isspace (*line)) - line++; + ++line; if (*line == '\0') break; @@ -133,7 +132,7 @@ _nss_nisplus_parse_netent (nis_result *result, struct netent *network, ++i; } else - network->n_aliases[i+1] = NULL; + network->n_aliases[i + 1] = NULL; } return 1; @@ -144,19 +143,26 @@ _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[] = "networks.org_dir."; - p = __stpcpy (buf, "networks.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; } @@ -164,16 +170,20 @@ enum nss_status _nss_nisplus_setnetent (int stayopen) { enum nss_status status = NSS_STATUS_SUCCESS; - int err; __libc_lock_lock (lock); - if (result) - nis_freeresult (result); - result = NULL; + if (result != NULL) + { + nis_freeresult (result); + result = NULL; + } if (tablename_val == NULL) - status = _nss_create_tablename (&err); + { + int err; + status = _nss_create_tablename (&err); + } __libc_lock_unlock (lock); @@ -185,9 +195,11 @@ _nss_nisplus_endnetent (void) { __libc_lock_lock (lock); - if (result) - nis_freeresult (result); - result = NULL; + if (result != NULL) + { + nis_freeresult (result); + result = NULL; + } __libc_lock_unlock (lock); @@ -220,9 +232,7 @@ internal_nisplus_getnetent_r (struct netent *network, char *buffer, result = nis_first_entry (tablename_val); if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) { - int retval; - - retval = niserr2nss (result->status); + int retval = niserr2nss (result->status); nis_freeresult (result); result = NULL; if (retval == NSS_STATUS_TRYAGAIN) @@ -237,16 +247,12 @@ internal_nisplus_getnetent_r (struct netent *network, char *buffer, } else { - nis_result *res; - - res = nis_next_entry (tablename_val, &result->cookie); + nis_result *res = nis_next_entry (tablename_val, &result->cookie); saved_res = result; result = res; if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) { - int retval; - - retval = niserr2nss (result->status); + int retval = niserr2nss (result->status); nis_freeresult (result); result = saved_res; if (retval == NSS_STATUS_TRYAGAIN) @@ -266,7 +272,8 @@ internal_nisplus_getnetent_r (struct netent *network, char *buffer, return NSS_STATUS_TRYAGAIN; } - } while (!parse_res); + } + while (!parse_res); return NSS_STATUS_SUCCESS; } @@ -296,8 +303,12 @@ _nss_nisplus_getnetbyname_r (const char *name, struct netent *network, 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; } @@ -308,76 +319,82 @@ _nss_nisplus_getnetbyname_r (const char *name, struct netent *network, *herrnop = NETDB_INTERNAL; return NSS_STATUS_UNAVAIL; } - else - { - nis_result *result; - char buf[strlen (name) + 255 + tablename_len]; - int olderr = errno; - /* Search at first in the alias list, and use the correct name - for the next search */ - sprintf (buf, "[name=%s],%s", name, tablename_val); - result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL); + nis_result *result; + char buf[strlen (name) + 10 + tablename_len]; + int olderr = errno; - if (result != NULL) - { - /* If we do not find it, try it as original name. But if the - database is correct, we should find it in the first case, too */ - if ((result->status != NIS_SUCCESS - && result->status != NIS_S_SUCCESS) - || __type_of (result->objects.objects_val) != NIS_ENTRY_OBJ - || strcmp (result->objects.objects_val[0].EN_data.en_type, - "networks_tbl") != 0 - || (result->objects.objects_val[0].EN_data.en_cols.en_cols_len - < 3)) - sprintf (buf, "[cname=%s],%s", name, tablename_val); - else - sprintf (buf, "[cname=%s],%s", NISENTRYVAL (0, 0, result), - tablename_val); - - nis_freeresult (result); - result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL); - } + /* Search at first in the alias list, and use the correct name + for the next search */ + snprintf (buf, sizeof (buf), "[name=%s],%s", name, tablename_val); + result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL); - if (result == NULL) - { - __set_errno (ENOMEM); - return NSS_STATUS_TRYAGAIN; - } - retval = niserr2nss (result->status); - if (retval != NSS_STATUS_SUCCESS) + if (result != NULL) + { + char *bufptr = buf; + + /* If we do not find it, try it as original name. But if the + database is correct, we should find it in the first case, too */ + if ((result->status != NIS_SUCCESS + && result->status != NIS_S_SUCCESS) + || __type_of (result->objects.objects_val) != NIS_ENTRY_OBJ + || strcmp (result->objects.objects_val[0].EN_data.en_type, + "networks_tbl") != 0 + || (result->objects.objects_val[0].EN_data.en_cols.en_cols_len + < 3)) + snprintf (buf, sizeof (buf), "[cname=%s],%s", name, tablename_val); + else { - if (retval == NSS_STATUS_TRYAGAIN) - { - *errnop = errno; - *herrnop = NETDB_INTERNAL; - } - else - __set_errno (olderr); - nis_freeresult (result); - return retval; + /* We need to allocate a new buffer since there is no + guarantee the returned name has a length limit. */ + const char *entryval = NISENTRYVAL (0, 0, result); + size_t buflen = strlen (entryval) + 10 + tablename_len; + bufptr = alloca (buflen); + snprintf (bufptr, buflen, "[cname=%s],%s", + entryval, tablename_val); } - parse_res = _nss_nisplus_parse_netent (result, network, buffer, buflen, - errnop); - nis_freeresult (result); + result = nis_list (bufptr, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL); + } - if (parse_res > 0) - return NSS_STATUS_SUCCESS; + if (result == NULL) + { + __set_errno (ENOMEM); + return NSS_STATUS_TRYAGAIN; + } - *herrnop = NETDB_INTERNAL; - if (parse_res == -1) + retval = niserr2nss (result->status); + if (__builtin_expect (retval != NSS_STATUS_SUCCESS, 0)) + { + if (retval == NSS_STATUS_TRYAGAIN) { - *errnop = ERANGE; - return NSS_STATUS_TRYAGAIN; + *errnop = errno; + *herrnop = NETDB_INTERNAL; } else - { - __set_errno (olderr); - return NSS_STATUS_NOTFOUND; - } + __set_errno (olderr); + nis_freeresult (result); + return retval; } + + parse_res = _nss_nisplus_parse_netent (result, network, buffer, buflen, + errnop); + + nis_freeresult (result); + + if (parse_res > 0) + return NSS_STATUS_SUCCESS; + + *herrnop = NETDB_INTERNAL; + if (parse_res == -1) + { + *errnop = ERANGE; + return NSS_STATUS_TRYAGAIN; + } + + __set_errno (olderr); + return NSS_STATUS_NOTFOUND; } /* XXX type is ignored, SUN's NIS+ table doesn't support it */ @@ -388,8 +405,12 @@ _nss_nisplus_getnetbyaddr_r (uint32_t addr, const int type, { 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; } |