check_parent_exists() can change errno. Ensure we preserve it across calls.
[Samba.git] / source3 / nmbd / nmbd_lmhosts.c
blobc3eb2b58dd4adce164f6accc5b45c1239d3c346b
1 /*
2 Unix SMB/CIFS implementation.
3 NBT netbios routines and daemon - version 2
4 Copyright (C) Jeremy Allison 1994-1998
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 Revision History:
21 Handle lmhosts file reading.
25 #include "includes.h"
26 #include "../libcli/nbt/libnbt.h"
27 #include "nmbd/nmbd.h"
29 /****************************************************************************
30 Load a lmhosts file.
31 ****************************************************************************/
33 void load_lmhosts_file(const char *fname)
35 char *name = NULL;
36 int name_type;
37 struct sockaddr_storage ss;
38 TALLOC_CTX *ctx = talloc_init("load_lmhosts_file");
39 XFILE *fp = startlmhosts( fname );
41 if (!fp) {
42 DEBUG(2,("load_lmhosts_file: Can't open lmhosts file %s. Error was %s\n",
43 fname, strerror(errno)));
44 TALLOC_FREE(ctx);
45 return;
48 while (getlmhostsent(ctx, fp, &name, &name_type, &ss) ) {
49 struct in_addr ipaddr;
50 struct subnet_record *subrec = NULL;
51 enum name_source source = LMHOSTS_NAME;
53 if (ss.ss_family != AF_INET) {
54 TALLOC_FREE(name);
55 continue;
58 ipaddr = ((struct sockaddr_in *)&ss)->sin_addr;
60 /* We find a relevent subnet to put this entry on, then add it. */
61 /* Go through all the broadcast subnets and see if the mask matches. */
62 for (subrec = FIRST_SUBNET; subrec ; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
63 if(same_net_v4(ipaddr, subrec->bcast_ip, subrec->mask_ip))
64 break;
67 /* If none match add the name to the remote_broadcast_subnet. */
68 if(subrec == NULL)
69 subrec = remote_broadcast_subnet;
71 if(name_type == -1) {
72 /* Add the (0) and (0x20) names directly into the namelist for this subnet. */
73 (void)add_name_to_subnet(subrec,name,0x00,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
74 (void)add_name_to_subnet(subrec,name,0x20,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
75 } else {
76 /* Add the given name type to the subnet namelist. */
77 (void)add_name_to_subnet(subrec,name,name_type,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
81 TALLOC_FREE(ctx);
82 endlmhosts(fp);
85 /****************************************************************************
86 Find a name read from the lmhosts file. We secretly check the names on
87 the remote_broadcast_subnet as if the name was added to a regular broadcast
88 subnet it will be found by normal name query processing.
89 ****************************************************************************/
91 bool find_name_in_lmhosts(struct nmb_name *nmbname, struct name_record **namerecp)
93 struct name_record *namerec;
95 *namerecp = NULL;
97 if((namerec = find_name_on_subnet(remote_broadcast_subnet, nmbname, FIND_ANY_NAME))==NULL)
98 return False;
100 if(!NAME_IS_ACTIVE(namerec) || (namerec->data.source != LMHOSTS_NAME))
101 return False;
103 *namerecp = namerec;
104 return True;