diff options
Diffstat (limited to 'source3/nsswitch')
| -rw-r--r-- | source3/nsswitch/README | 13 | ||||
| -rw-r--r-- | source3/nsswitch/wins.c | 129 |
2 files changed, 142 insertions, 0 deletions
diff --git a/source3/nsswitch/README b/source3/nsswitch/README new file mode 100644 index 0000000000..9f0c581df6 --- /dev/null +++ b/source3/nsswitch/README @@ -0,0 +1,13 @@ +This extension provides a "wins" module for NSS on glibc2/Linux. This +allows you to use a WINS entry in /etc/nsswitch.conf for hostname +resolution, allowing you to resolve netbios names via start unix +gethostbyname() calls. The end result is that you can use netbios +names as host names in unix apps. + +1) run configure +2) run "make nsswitch" +3) cp nsswitch/libnss_wins.so /lib/libnss_wins.so.2 +4) add a wins entry to the hosts line in /etc/nsswitch.conf +5) use it + +tridge@linuxcare.com diff --git a/source3/nsswitch/wins.c b/source3/nsswitch/wins.c new file mode 100644 index 0000000000..6c291bb1bf --- /dev/null +++ b/source3/nsswitch/wins.c @@ -0,0 +1,129 @@ +/* + 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 <nss.h> + +extern int DEBUGLEVEL; + +#ifndef INADDRSZ +#define INADDRSZ 4 +#endif + +struct in_addr *lookup_backend(const char *name, int *count) +{ + int fd; + static int initialised; + struct in_addr *ret; + char *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 = open_socket_in(SOCK_DGRAM,0, 3, interpret_addr("0.0.0.0"), True); + if (fd == -1) return NULL; + + set_socket_options(fd,"SO_BROADCAST"); + + p = lp_wins_server(); + if (p && *p) { + ret = name_query(fd,name,0x20,False,True, *interpret_addr2(p), count,NULL); + 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,NULL); + 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,NULL); + 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; + + ip_list = lookup_backend(name, &count); + if (!ip_list) { + return NSS_STATUS_NOTFOUND; + } + + if (buflen < (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;i<count;i++) { + memcpy(buffer, &ip_list[i].s_addr, INADDRSZ); + *host_addresses = buffer; + buffer += INADDRSZ; + buflen -= INADDRSZ; + host_addresses++; + } + + if (ip_list) free(ip_list); + + return NSS_STATUS_SUCCESS; +} |