/* Unix SMB/Netbios implementation. Version 2.0 a WINS nsswitch module Copyright (C) Andrew Tridgell 1999 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define NO_SYSLOG #include "includes.h" #include extern int DEBUGLEVEL; #ifndef INADDRSZ #define INADDRSZ 4 #endif /* Use our own create socket code so we don't recurse.... */ static int wins_lookup_open_socket_in(void) { struct sockaddr_in sock; int val=1; int res; memset((char *)&sock,'\0',sizeof(sock)); #ifdef HAVE_SOCK_SIN_LEN sock.sin_len = sizeof(sock); #endif sock.sin_port = 0; sock.sin_family = AF_INET; sock.sin_addr.s_addr = interpret_addr("0.0.0.0"); res = socket(AF_INET, SOCK_DGRAM, 0); if (res == -1) return -1; setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val)); #ifdef SO_REUSEPORT setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val)); #endif /* SO_REUSEPORT */ /* now we've got a socket - we need to bind it */ if (bind(res, (struct sockaddr * ) &sock,sizeof(sock)) < 0) return(-1); return res; } struct in_addr *lookup_backend(const char *name, int *count) { int fd; static int initialised; struct in_addr *ret; struct in_addr p; int j; if (!initialised) { initialised = 1; DEBUGLEVEL = 0; TimeInit(); setup_logging("nss_wins",True); charset_initialise(); lp_load(CONFIGFILE,True,False,False); load_interfaces(); } *count = 0; fd = wins_lookup_open_socket_in(); if (fd == -1) return NULL; set_socket_options(fd,"SO_BROADCAST"); /* The next four lines commented out by JHT and replaced with the four lines following */ /* if( !zero_ip( wins_ip ) ) { * ret = name_query( fd, name, 0x20, False, True, wins_src_ip(), count ); * goto out; * } */ p = wins_srv_ip(); if( !zero_ip(p) ) { ret = name_query(fd,name,0x20,False,True, p, count); goto out; } if (lp_wins_support()) { /* we are our own WINS server */ ret = name_query(fd,name,0x20,False,True, *interpret_addr2("127.0.0.1"), count); goto out; } /* uggh, we have to broadcast to each interface in turn */ for (j=iface_count() - 1; j >= 0; j--) { struct in_addr *bcast = iface_n_bcast(j); ret = name_query(fd,name,0x20,True,True,*bcast,count); if (ret) break; } out: close(fd); return ret; } /**************************************************************************** gethostbyname() - we ignore any domain portion of the name and only handle names that are at most 15 characters long **************************************************************************/ enum nss_status _nss_wins_gethostbyname_r(const char *name, struct hostent *he, char *buffer, size_t buflen, int *errnop, int *h_errnop) { char **host_addresses; struct in_addr *ip_list; int i, count; size_t namelen = strlen(name) + 1; memset(he, '\0', sizeof(*he)); ip_list = lookup_backend(name, &count); if (!ip_list) { return NSS_STATUS_NOTFOUND; } if (buflen < namelen + (2*count+1)*INADDRSZ) { /* no ENOMEM error type?! */ return NSS_STATUS_NOTFOUND; } host_addresses = (char **)buffer; he->h_addr_list = host_addresses; host_addresses[count] = NULL; buffer += (count + 1) * INADDRSZ; buflen += (count + 1) * INADDRSZ; he->h_addrtype = AF_INET; he->h_length = INADDRSZ; for (i=0;ih_name = buffer; return NSS_STATUS_SUCCESS; }