/* Copyright (C) 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Thorsten Kukuk , 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 #include #include #include #include #include #include #include #include #include #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 0; 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 0; 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 0; } 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 0; } 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; }