diff options
Diffstat (limited to 'nis/nss_nisplus/nisplus-network.c')
| -rw-r--r-- | nis/nss_nisplus/nisplus-network.c | 494 |
1 files changed, 0 insertions, 494 deletions
diff --git a/nis/nss_nisplus/nisplus-network.c b/nis/nss_nisplus/nisplus-network.c deleted file mode 100644 index a731ed7e8b..0000000000 --- a/nis/nss_nisplus/nisplus-network.c +++ /dev/null @@ -1,494 +0,0 @@ -/* Copyright (C) 1997-2020 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997. - - 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 <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 <rpcsvc/nis.h> -#include <libc-lock.h> - -#include "nss-nisplus.h" - -__libc_lock_define_initialized (static, lock) - -static nis_result *result; -static nis_name tablename_val; -static u_long tablename_len; - -#define NISENTRYVAL(idx, col, res) \ - (NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val) - -#define NISENTRYLEN(idx, col, res) \ - (NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len) - - -static int -_nss_nisplus_parse_netent (nis_result *result, struct netent *network, - char *buffer, size_t buflen, int *errnop) -{ - char *first_unused = buffer; - size_t room_left = buflen; - - if (result == NULL) - return 0; - - if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS) - || __type_of (NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ - || strcmp (NIS_RES_OBJECT (result)[0].EN_data.en_type, - "networks_tbl") != 0 - || NIS_RES_OBJECT (result)[0].EN_data.en_cols.en_cols_len < 3) - return 0; - - if (NISENTRYLEN (0, 0, result) >= room_left) - { - /* The line is too long for our buffer. */ - no_more_room: - *errnop = ERANGE; - return -1; - } - - strncpy (first_unused, NISENTRYVAL (0, 0, result), - NISENTRYLEN (0, 0, result)); - first_unused[NISENTRYLEN (0, 0, result)] = '\0'; - network->n_name = first_unused; - size_t len = strlen (first_unused) + 1; - room_left -= len; - first_unused += len; - - network->n_addrtype = 0; - network->n_net = inet_network (NISENTRYVAL (0, 2, result)); - - /* XXX Rewrite at some point to allocate the array first and then - copy the strings. It wasteful to first concatenate the strings - to just split them again later. */ - char *line = first_unused; - for (unsigned int i = 0; i < NIS_RES_NUMOBJ (result); ++i) - { - if (strcmp (NISENTRYVAL (i, 1, result), network->n_name) != 0) - { - if (NISENTRYLEN (i, 1, result) + 2 > room_left) - goto no_more_room; - - *first_unused++ = ' '; - first_unused = __stpncpy (first_unused, NISENTRYVAL (i, 1, result), - NISENTRYLEN (i, 1, result)); - room_left -= (NISENTRYLEN (i, 1, result) + 1); - } - } - *first_unused++ = '\0'; - - /* Adjust the pointer so it is aligned for - storing pointers. */ - size_t adjust = ((__alignof__ (char *) - - (first_unused - (char *) 0) % __alignof__ (char *)) - % __alignof__ (char *)); - if (room_left < adjust + sizeof (char *)) - goto no_more_room; - first_unused += adjust; - room_left -= adjust; - network->n_aliases = (char **) first_unused; - - /* For the terminating NULL pointer. */ - room_left -= sizeof (char *); - - unsigned int i = 0; - while (*line != '\0') - { - /* Skip leading blanks. */ - while (isspace (*line)) - ++line; - - if (*line == '\0') - break; - - if (room_left < sizeof (char *)) - goto no_more_room; - - room_left -= sizeof (char *); - network->n_aliases[i++] = line; - - while (*line != '\0' && *line != ' ') - ++line; - - if (*line == ' ') - *line++ = '\0'; - } - network->n_aliases[i] = NULL; - - return 1; -} - - -static enum nss_status -_nss_create_tablename (int *errnop) -{ - if (tablename_val == NULL) - { - const char *local_dir = nis_local_directory (); - size_t local_dir_len = strlen (local_dir); - static const char prefix[] = "networks.org_dir."; - - char *p = malloc (sizeof (prefix) + local_dir_len); - if (p == NULL) - { - *errnop = errno; - return NSS_STATUS_TRYAGAIN; - } - - 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; -} - -enum nss_status -_nss_nisplus_setnetent (int stayopen) -{ - enum nss_status status = NSS_STATUS_SUCCESS; - - __libc_lock_lock (lock); - - if (result != NULL) - { - nis_freeresult (result); - result = NULL; - } - - if (tablename_val == NULL) - { - int err; - status = _nss_create_tablename (&err); - } - - __libc_lock_unlock (lock); - - return status; -} - -enum nss_status -_nss_nisplus_endnetent (void) -{ - __libc_lock_lock (lock); - - if (result != NULL) - { - nis_freeresult (result); - result = NULL; - } - - __libc_lock_unlock (lock); - - return NSS_STATUS_SUCCESS; -} - -static enum nss_status -internal_nisplus_getnetent_r (struct netent *network, char *buffer, - size_t buflen, int *errnop, int *herrnop) -{ - int parse_res; - - /* Get the next entry until we found a correct one. */ - do - { - nis_result *saved_res; - - if (result == NULL) - { - saved_res = NULL; - - if (tablename_val == NULL) - { - enum nss_status status = _nss_create_tablename (errnop); - - if (status != NSS_STATUS_SUCCESS) - return status; - } - - result = nis_first_entry (tablename_val); - if (result == NULL) - { - *errnop = errno; - return NSS_STATUS_TRYAGAIN; - } - if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) - { - int retval = niserr2nss (result->status); - nis_freeresult (result); - result = NULL; - if (retval == NSS_STATUS_TRYAGAIN) - { - *herrnop = NETDB_INTERNAL; - *errnop = errno; - return retval; - } - else - return retval; - } - } - else - { - saved_res = result; - result = nis_next_entry (tablename_val, &result->cookie); - if (result == NULL) - { - *errnop = errno; - return NSS_STATUS_TRYAGAIN; - } - if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) - { - int retval = niserr2nss (result->status); - nis_freeresult (result); - result = saved_res; - if (retval == NSS_STATUS_TRYAGAIN) - { - *herrnop = NETDB_INTERNAL; - *errnop = errno; - } - return retval; - } - } - - parse_res = _nss_nisplus_parse_netent (result, network, buffer, - buflen, errnop); - if (parse_res == -1) - { - *herrnop = NETDB_INTERNAL; - return NSS_STATUS_TRYAGAIN; - } - - } - while (!parse_res); - - return NSS_STATUS_SUCCESS; -} - -enum nss_status -_nss_nisplus_getnetent_r (struct netent *result, char *buffer, - size_t buflen, int *errnop, int *herrnop) -{ - int status; - - __libc_lock_lock (lock); - - status = internal_nisplus_getnetent_r (result, buffer, buflen, errnop, - herrnop); - - __libc_lock_unlock (lock); - - return status; -} - -enum nss_status -_nss_nisplus_getnetbyname_r (const char *name, struct netent *network, - char *buffer, size_t buflen, int *errnop, - int *herrnop) -{ - int parse_res, retval; - - 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; - } - - if (name == NULL) - { - *errnop = EINVAL; - *herrnop = NETDB_INTERNAL; - return NSS_STATUS_UNAVAIL; - } - - nis_result *result; - char buf[strlen (name) + 10 + tablename_len]; - int olderr = errno; - - /* 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 | USE_DGRAM, NULL, NULL); - - 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 - { - /* 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); - } - - nis_freeresult (result); - result = nis_list (bufptr, FOLLOW_LINKS | FOLLOW_PATH | USE_DGRAM, - NULL, NULL); - } - - if (result == NULL) - { - __set_errno (ENOMEM); - return NSS_STATUS_TRYAGAIN; - } - - retval = niserr2nss (result->status); - if (__glibc_unlikely (retval != NSS_STATUS_SUCCESS)) - { - if (retval == NSS_STATUS_TRYAGAIN) - { - *errnop = errno; - *herrnop = NETDB_INTERNAL; - } - else - __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 */ -enum nss_status -_nss_nisplus_getnetbyaddr_r (uint32_t addr, const int type, - struct netent *network, char *buffer, - size_t buflen, int *errnop, int *herrnop) -{ - 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; - } - - { - char buf[27 + tablename_len]; - char buf2[18]; - int olderr = errno; - - struct in_addr in = { .s_addr = htonl (addr) }; - strcpy (buf2, inet_ntoa (in)); - size_t b2len = strlen (buf2); - - while (1) - { - snprintf (buf, sizeof (buf), "[addr=%s],%s", buf2, tablename_val); - nis_result *result = nis_list (buf, EXPAND_NAME | USE_DGRAM, - NULL, NULL); - - if (result == NULL) - { - __set_errno (ENOMEM); - return NSS_STATUS_TRYAGAIN; - } - enum nss_status retval = niserr2nss (result->status); - if (__glibc_unlikely (retval != NSS_STATUS_SUCCESS)) - { - if (b2len > 2 && buf2[b2len - 2] == '.' && buf2[b2len - 1] == '0') - { - /* Try again, but with trailing dot(s) - removed (one by one) */ - buf2[b2len - 2] = '\0'; - b2len -= 2; - nis_freeresult (result); - continue; - } - - if (retval == NSS_STATUS_TRYAGAIN) - { - *errnop = errno; - *herrnop = NETDB_INTERNAL; - } - else - __set_errno (olderr); - nis_freeresult (result); - return retval; - } - - int 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; - } - else - { - __set_errno (olderr); - return NSS_STATUS_NOTFOUND; - } - } - } -} |