2 Unix SMB/Netbios implementation.
5 Copyright (C) Andrew Tridgell 1999
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
32 /* Use our own create socket code so we don't recurse.... */
34 static int wins_lookup_open_socket_in(void)
36 struct sockaddr_in sock;
40 memset((char *)&sock,'\0',sizeof(sock));
42 #ifdef HAVE_SOCK_SIN_LEN
43 sock.sin_len = sizeof(sock);
46 sock.sin_family = AF_INET;
47 sock.sin_addr.s_addr = interpret_addr("0.0.0.0");
48 res = socket(AF_INET, SOCK_DGRAM, 0);
52 setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val));
54 setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val));
55 #endif /* SO_REUSEPORT */
57 /* now we've got a socket - we need to bind it */
59 if (bind(res, (struct sockaddr * ) &sock,sizeof(sock)) < 0)
65 struct in_addr *lookup_backend(const char *name, int *count)
68 static int initialised;
76 setup_logging("nss_wins",True);
77 lp_load(dyn_CONFIGFILE,True,False,False);
83 fd = wins_lookup_open_socket_in();
87 set_socket_options(fd,"SO_BROADCAST");
89 /* The next four lines commented out by JHT
90 and replaced with the four lines following */
91 /* if( !is_zero_ip( wins_ip ) ) {
92 * ret = name_query( fd, name, 0x20, False, True, wins_src_ip(), count );
97 if( !is_zero_ip(p) ) {
98 ret = name_query(fd,name,0x20,False,True, p, count);
102 if (lp_wins_support()) {
103 /* we are our own WINS server */
104 ret = name_query(fd,name,0x20,False,True, *interpret_addr2("127.0.0.1"), count);
108 /* uggh, we have to broadcast to each interface in turn */
109 for (j=iface_count() - 1;
112 struct in_addr *bcast = iface_n_bcast(j);
113 ret = name_query(fd,name,0x20,True,True,*bcast,count);
124 /****************************************************************************
125 gethostbyname() - we ignore any domain portion of the name and only
126 handle names that are at most 15 characters long
127 **************************************************************************/
129 _nss_wins_gethostbyname_r(const char *name, struct hostent *he,
130 char *buffer, size_t buflen, int *errnop,
133 char **host_addresses;
134 struct in_addr *ip_list;
136 size_t namelen = strlen(name) + 1;
138 memset(he, '\0', sizeof(*he));
140 ip_list = lookup_backend(name, &count);
142 return NSS_STATUS_NOTFOUND;
145 if (buflen < namelen + (2*count+1)*INADDRSZ) {
146 /* no ENOMEM error type?! */
147 return NSS_STATUS_NOTFOUND;
151 host_addresses = (char **)buffer;
152 he->h_addr_list = host_addresses;
153 host_addresses[count] = NULL;
154 buffer += (count + 1) * INADDRSZ;
155 buflen += (count + 1) * INADDRSZ;
156 he->h_addrtype = AF_INET;
157 he->h_length = INADDRSZ;
159 for (i=0;i<count;i++) {
160 memcpy(buffer, &ip_list[i].s_addr, INADDRSZ);
161 *host_addresses = buffer;
169 memcpy(buffer, name, namelen);
172 return NSS_STATUS_SUCCESS;