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/*
Unix SMB/CIFS implementation.
Winbind daemon - WINS related functions
Copyright (C) Andrew Tridgell 1999
Copyright (C) Herb Lewis 2002
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.
*/
#include "winbindd.h"
/* 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) {
close(res);
return(-1);
}
set_socket_options(res,"SO_BROADCAST");
return res;
}
static struct node_status *lookup_byaddr_backend(char *addr, int *count)
{
int fd;
struct in_addr ip;
struct nmb_name nname;
struct node_status *status;
fd = wins_lookup_open_socket_in();
if (fd == -1)
return NULL;
make_nmb_name(&nname, "*", 0);
ip = *interpret_addr2(addr);
status = node_status_query(fd,&nname,ip, count);
close(fd);
return status;
}
static struct in_addr *lookup_byname_backend(const char *name, int *count)
{
int fd;
struct in_addr *ret = NULL;
struct in_addr p;
int j, flags;
*count = 0;
fd = wins_lookup_open_socket_in();
if (fd == -1)
return NULL;
p = wins_srv_ip();
if( !is_zero_ip(p) ) {
ret = name_query(fd,name,0x20,False,True, p, count, &flags);
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, &flags);
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, &flags);
if (ret) break;
}
out:
close(fd);
return ret;
}
/* Get hostname from IP */
enum winbindd_result winbindd_wins_byip(struct winbindd_cli_state *state)
{
fstring response;
int i, count, maxlen, size;
struct node_status *status;
DEBUG(3, ("[%5d]: wins_byip %s\n", state->pid,
state->request.data.winsreq));
*response = '\0';
maxlen = sizeof(response) - 1;
if ((status = lookup_byaddr_backend(state->request.data.winsreq, &count))){
size = strlen(state->request.data.winsreq);
if (size > maxlen) {
SAFE_FREE(status);
return WINBINDD_ERROR;
}
safe_strcat(response,state->request.data.winsreq,maxlen);
safe_strcat(response,"\t",maxlen);
for (i = 0; i < count; i++) {
/* ignore group names */
if (status[i].flags & 0x80) continue;
if (status[i].type == 0x20) {
size = sizeof(status[i].name) + strlen(response);
if (size > maxlen) {
SAFE_FREE(status);
return WINBINDD_ERROR;
}
safe_strcat(response, status[i].name, maxlen);
safe_strcat(response, " ", maxlen);
}
}
/* make last character a newline */
response[strlen(response)-1] = '\n';
SAFE_FREE(status);
}
fstrcpy(state->response.data.winsresp,response);
return WINBINDD_OK;
}
/* Get IP from hostname */
enum winbindd_result winbindd_wins_byname(struct winbindd_cli_state *state)
{
struct in_addr *ip_list;
int i, count, maxlen, size;
fstring response;
char * addr;
DEBUG(3, ("[%5d]: wins_byname %s\n", state->pid,
state->request.data.winsreq));
*response = '\0';
maxlen = sizeof(response) - 1;
if ((ip_list = lookup_byname_backend(state->request.data.winsreq,&count))){
for (i = count; i ; i--) {
addr = inet_ntoa(ip_list[i-1]);
size = strlen(addr);
if (size > maxlen) {
SAFE_FREE(ip_list);
return WINBINDD_ERROR;
}
if (i != 0) {
/* Clear out the newline character */
response[strlen(response)-1] = ' ';
}
safe_strcat(response,addr,maxlen);
safe_strcat(response,"\t",maxlen);
}
size = strlen(state->request.data.winsreq) + strlen(response);
if (size > maxlen) {
SAFE_FREE(ip_list);
return WINBINDD_ERROR;
}
safe_strcat(response,state->request.data.winsreq,maxlen);
safe_strcat(response,"\n",maxlen);
SAFE_FREE(ip_list);
} else
return WINBINDD_ERROR;
fstrcpy(state->response.data.winsresp,response);
return WINBINDD_OK;
}
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