/* Copyright (C) 1997, 1998, 2000, 2001, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Thorsten Kukuk <kukuk@suse.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, 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 <bits/libc-lock.h> #include <netdb.h> #include <netinet/ether.h> #include <rpcsvc/nis.h> #include <netinet/if_ether.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) \ ((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, int *errnop) { char *p = buffer; size_t room_left = buflen; if (result == NULL) return 0; if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS) || result->objects.objects_len != 1 || __type_of (NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ || strcmp (NIS_RES_OBJECT (result)->EN_data.en_type, "ethers_tbl") != 0 || NIS_RES_OBJECT (result)->EN_data.en_cols.en_cols_len < 2) return 0; /* Generate the ether entry format and use the normal parser */ 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); ether->e_name = p; ether->e_addr = *ether_aton (NISENTRYVAL (0, 1, result)); return 1; } static enum nss_status _nss_create_tablename (int *errnop) { if (tablename_val == NULL) { char buf [40 + strlen (nis_local_directory ())]; char *p; p = __stpcpy (buf, "ethers.org_dir."); p = __stpcpy (p, nis_local_directory ()); tablename_val = __strdup (buf); if (tablename_val == NULL) { *errnop = errno; return NSS_STATUS_TRYAGAIN; } tablename_len = strlen (tablename_val); } return NSS_STATUS_SUCCESS; } enum nss_status _nss_nisplus_setetherent (int stayopen) { enum nss_status status; int err; status = NSS_STATUS_SUCCESS; __libc_lock_lock (lock); if (result) nis_freeresult (result); result = NULL; if (_nss_create_tablename (&err) != NSS_STATUS_SUCCESS) status = NSS_STATUS_UNAVAIL; __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; __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 *errnop) { int parse_res; if (tablename_val == NULL) { enum nss_status status = _nss_create_tablename (errnop); if (status != NSS_STATUS_SUCCESS) return status; } /* Get the next entry until we found a correct one. */ do { nis_result *saved_result; if (result == NULL) { saved_result = NULL; result = nis_first_entry (tablename_val); 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; if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) { nis_freeresult (saved_result); return niserr2nss (result->status); } } parse_res = _nss_nisplus_parse_etherent (result, ether, buffer, buflen, errnop); 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); return NSS_STATUS_SUCCESS; } enum nss_status _nss_nisplus_getetherent_r (struct etherent *result, char *buffer, size_t buflen, int *errnop) { int status; __libc_lock_lock (lock); status = internal_nisplus_getetherent_r (result, buffer, buflen, errnop); __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 *errnop) { int parse_res; if (tablename_val == NULL) { enum nss_status status = _nss_create_tablename (errnop); if (status != NSS_STATUS_SUCCESS) return status; } if (name == NULL) { *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); result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL); if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) { enum nss_status status = niserr2nss (result->status); nis_freeresult (result); return status; } 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; } } enum nss_status _nss_nisplus_getntohost_r (const struct ether_addr *addr, struct etherent *eth, char *buffer, size_t buflen, int *errnop) { if (tablename_val == NULL) { enum nss_status status = _nss_create_tablename (errnop); if (status != NSS_STATUS_SUCCESS) return status; } if (addr == NULL) { *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]); result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL); if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) { enum nss_status status = niserr2nss (result->status); nis_freeresult (result); return status; } 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; } }