diff options
Diffstat (limited to 'nis/nss_nisplus/nisplus-ethers.c')
| -rw-r--r-- | nis/nss_nisplus/nisplus-ethers.c | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/nis/nss_nisplus/nisplus-ethers.c b/nis/nss_nisplus/nisplus-ethers.c new file mode 100644 index 0000000000..ac3e06960a --- /dev/null +++ b/nis/nss_nisplus/nisplus-ethers.c @@ -0,0 +1,278 @@ +/* Copyright (C) 1997 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <nss.h> +#include <errno.h> +#include <ctype.h> +#include <string.h> +#include <libc-lock.h> +#include <netdb.h> +#include <netinet/ether.h> +#include <rpcsvc/nis.h> +#include <rpcsvc/nislib.h> +#include <netinet/if_ether.h> + +#include "nss-nisplus.h" + +__libc_lock_define_initialized (static, lock) + +static nis_result *result = NULL; +static nis_name *names = NULL; + +/* Because the `ethers' lookup does not fit so well in the scheme so + we define a dummy struct here which helps us to use the available + functions. */ +struct etherent +{ + const char *e_name; + struct ether_addr e_addr; +}; +struct etherent_data {}; + +#define ENTNAME etherent +#define DATABASE "ethers" +#include "../../nss/nss_files/files-parse.c" +LINE_PARSER +("#", + /* Read the ethernet address: 6 x 8bit hexadecimal number. */ + { + size_t cnt; + + for (cnt = 0; cnt < 6; ++cnt) + { + unsigned int number; + + if (cnt < 5) + INT_FIELD (number, ISCOLON , 0, 16, (unsigned int)) + else + INT_FIELD (number, isspace, 0, 16, (unsigned int)) + + if (number > 0xff) + return 0; + result->e_addr.ether_addr_octet[cnt] = number; + } + }; + STRING_FIELD (result->e_name, isspace, 1); + ) + +#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 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) + +static int +_nss_nisplus_parse_etherent (nis_result *result, struct etherent *ether, + char *buffer, size_t buflen) +{ + char *p = buffer; + size_t room_left = buflen; + struct parser_data *data = (void *) buffer; + + if (result == NULL) + return -1; + + if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS) || + result->objects.objects_len != 1 || + result->objects.objects_val[0].zo_data.zo_type != ENTRY_OBJ || + strcmp(result->objects.objects_val[0].zo_data.objdata_u.en_data.en_type, + "ethers_tbl") != 0 || + result->objects.objects_val[0].zo_data.objdata_u.en_data.en_cols.en_cols_len < 2) + return -1; + + memset (p, '\0', room_left); + + /* Generate the ether entry format and use the normal parser */ + if (NISENTRYLEN (0, 0, result) +1 > room_left) + { + __set_errno (ERANGE); + return -1; + } + strncpy (p, NISENTRYVAL (0, 0, result), NISENTRYLEN (0, 0, result)); + room_left -= (NISENTRYLEN (0, 0, result) +1); + + if (NISENTRYLEN (0, 1, result) +1 > room_left) + { + __set_errno (ERANGE); + return -1; + } + strcat (p, "\t"); + strncat (p, NISENTRYVAL (0, 1, result), NISENTRYLEN (0, 1, result)); + room_left -= (NISENTRYLEN (0, 1, result) + 1); + + return _nss_files_parse_etherent (p,ether, data, buflen); +} + +enum nss_status +_nss_nisplus_setetherent (void) +{ + __libc_lock_lock (lock); + + if (result) + nis_freeresult (result); + result = NULL; + if (names) + { + nis_freenames (names); + names = NULL; + } + + __libc_lock_unlock (lock); + + return NSS_STATUS_SUCCESS; +} + +enum nss_status +_nss_nisplus_endetherent (void) +{ + __libc_lock_lock (lock); + + if (result) + nis_freeresult (result); + result = NULL; + if (names) + { + nis_freenames (names); + names = NULL; + } + + __libc_lock_unlock (lock); + + return NSS_STATUS_SUCCESS; +} + +static enum nss_status +internal_nisplus_getetherent_r (struct etherent *ether, char *buffer, + size_t buflen) +{ + int parse_res; + + /* Get the next entry until we found a correct one. */ + do + { + if (result == NULL) + { + names = nis_getnames("ethers.org_dir"); + if (names == NULL || names[0] == NULL) + return NSS_STATUS_UNAVAIL; + + result = nis_first_entry(names[0]); + if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) + return niserr2nss (result->status); + } + else + { + nis_result *res2; + + res2 = nis_next_entry(names[0], &result->cookie); + nis_freeresult (result); + result = res2; + if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) + return niserr2nss (result->status); + } + + parse_res = _nss_nisplus_parse_etherent (result, ether, buffer, buflen); + } while (!parse_res); + + return NSS_STATUS_SUCCESS; +} + +enum nss_status +_nss_nisplus_getetherent_r (struct etherent *result, char *buffer, + size_t buflen) +{ + int status; + + __libc_lock_lock (lock); + + status = internal_nisplus_getetherent_r (result, buffer, buflen); + + __libc_lock_unlock (lock); + + return status; +} + +enum nss_status +_nss_nisplus_gethostton_r (const char *name, struct etherent *eth, + char *buffer, size_t buflen) +{ + int parse_res; + + if (name == NULL) + return NSS_STATUS_NOTFOUND; + else + { + nis_result *result; + char buf[strlen (name) + 255]; + + sprintf(buf, "[name=%s],ethers.org_dir", name); + + result = nis_list(buf, EXPAND_NAME, NULL, NULL); + + if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) + return niserr2nss (result->status); + + parse_res = _nss_nisplus_parse_etherent (result, eth, buffer, buflen); + + if (parse_res) + return NSS_STATUS_SUCCESS; + + if (!parse_res && errno == ERANGE) + return NSS_STATUS_TRYAGAIN; + else + return NSS_STATUS_NOTFOUND; + } +} + +enum nss_status +_nss_nisplus_getntohost_r (const struct ether_addr *addr, + struct etherent *eth, + char *buffer, size_t buflen) +{ + int parse_res; + nis_result *result; + char buf[255]; + + if (addr == NULL) + { + __set_errno (EINVAL); + return NSS_STATUS_UNAVAIL; + } + + memset (&buf, '\0', sizeof (buf)); + snprintf(buf, sizeof (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]); + + result = nis_list(buf, EXPAND_NAME, NULL, NULL); + + if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) + return niserr2nss (result->status); + + parse_res = _nss_nisplus_parse_etherent (result, eth, buffer, buflen); + + if (parse_res) + return NSS_STATUS_SUCCESS; + + if (!parse_res && errno == ERANGE) + return NSS_STATUS_TRYAGAIN; + else + return NSS_STATUS_NOTFOUND; +} |