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/*
Unix SMB/CIFS implementation.
Wins Database
Copyright (C) Jeremy Allison 1994-2003
Copyright (C) Jelmer Vernooij 2005
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "system/filesys.h"
#include "lib/samba3/samba3.h"
#define WINS_VERSION 1
NTSTATUS samba3_read_winsdb( const char *fn, TALLOC_CTX *ctx, struct samba3_winsdb_entry **entries, uint32_t *count )
{
XFILE *fp;
char *line;
if((fp = x_fopen(fn,O_RDONLY,0)) == NULL) {
DEBUG(0,("initialise_wins: Can't open wins database file %s. Error was %s\n",
fn, strerror(errno) ));
return NT_STATUS_OPEN_FAILED;
}
*count = 0;
*entries = NULL;
while (!x_feof(fp)) {
struct samba3_winsdb_entry entry;
const char *name_str, *ttl_str, *nb_flags_str;
const char **args;
char *p;
int i;
unsigned int hash;
int version;
/* Read a line from the wins.dat file. Strips whitespace
from the beginning and end of the line. */
line = fgets_slash(NULL,8,fp);
if (!line) {
return NT_STATUS_UNEXPECTED_IO_ERROR;
}
if (*line == '#') {
SAFE_FREE(line);
continue;
}
if (strncmp(line,"VERSION ", 8) == 0) {
if (sscanf(line,"VERSION %d %u", &version, &hash) != 2 ||
version != WINS_VERSION) {
DEBUG(0,("Discarding invalid wins.dat file [%s]\n",line));
SAFE_FREE(line);
x_fclose(fp);
return NT_STATUS_REVISION_MISMATCH;
}
SAFE_FREE(line);
continue;
}
args = str_list_make_shell(ctx, line, NULL);
/*
* Now we handle multiple IP addresses per name we need
* to iterate over the line twice. The first time to
* determine how many IP addresses there are, the second
* time to actually parse them into the ip_list array.
*/
name_str = args[0];
if (!name_str) {
DEBUG(0,("initialise_wins: Failed to parse name when parsing line %s\n", line ));
SAFE_FREE(line);
continue;
}
ttl_str = args[1];
if (!ttl_str) {
DEBUG(0,("initialise_wins: Failed to parse time to live when parsing line %s\n", line ));
SAFE_FREE(line);
continue;
}
/*
* Determine the number of IP addresses per line.
*/
entry.ip_count = 0;
for (i = 2; args[i] && strchr(args[i], '.'); i++) entry.ip_count++;
if(entry.ip_count == 0) {
DEBUG(0,("initialise_wins: Missing IP address when parsing line %s\n", line ));
SAFE_FREE(line);
continue;
}
/* Allocate the space for the ip_list. */
if((entry.ips = talloc_array ( ctx, struct ipv4_addr, entry.ip_count)) == NULL) {
DEBUG(0,("initialise_wins: Malloc fail !\n"));
SAFE_FREE(line);
return NT_STATUS_NO_MEMORY;
}
/* Reset and re-parse the line. */
for(i = 0; i < entry.ip_count; i++) {
entry.ips[i] = interpret_addr2(args[i+2]);
}
nb_flags_str = args[2 + entry.ip_count];
SMB_ASSERT(nb_flags_str);
/*
* Deal with SELF or REGISTER name encoding. Default is REGISTER
* for compatibility with old nmbds.
*/
if(nb_flags_str[strlen(nb_flags_str)-1] == 'S') {
DEBUG(5,("initialise_wins: Ignoring SELF name %s\n", line));
talloc_free(entry.ips);
SAFE_FREE(line);
continue;
}
/* Netbios name. # divides the name from the type (hex): netbios#xx */
entry.name = talloc_strdup(ctx, name_str);
if((p = strchr(entry.name,'#')) != NULL) {
*p = 0;
sscanf(p+1,"%x",&entry.type);
}
/* Decode the netbios flags (hex) and the time-to-live (in seconds). */
sscanf(nb_flags_str,"%x",&entry.nb_flags);
entry.ttl = atol(ttl_str);
*entries = talloc_realloc(ctx, *entries, struct samba3_winsdb_entry, (*count)+1);
(*entries)[*count] = entry;
(*count)++;
}
x_fclose(fp);
return NT_STATUS_OK;
}
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