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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 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 "winbindd.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND
/* 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;
if (setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val))) {
close(res);
return -1;
}
#ifdef SO_REUSEPORT
if (setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val))) {
close(res);
return -1;
}
#endif /* SO_REUSEPORT */
/* now we've got a socket - we need to bind it */
if (bind(res, (struct sockaddr *)(void *)&sock, sizeof(sock)) < 0) {
close(res);
return(-1);
}
set_socket_options(res,"SO_BROADCAST");
return res;
}
static struct node_status *lookup_byaddr_backend(TALLOC_CTX *mem_ctx,
const char *addr, int *count)
{
int fd;
struct sockaddr_storage ss;
struct nmb_name nname;
struct node_status *result;
NTSTATUS status;
fd = wins_lookup_open_socket_in();
if (fd == -1)
return NULL;
make_nmb_name(&nname, "*", 0);
if (!interpret_string_addr(&ss, addr, AI_NUMERICHOST)) {
return NULL;
}
status = node_status_query(fd, &nname, &ss, mem_ctx,
&result, count, NULL);
close(fd);
if (!NT_STATUS_IS_OK(status)) {
return NULL;
}
return result;
}
static struct sockaddr_storage *lookup_byname_backend(TALLOC_CTX *mem_ctx,
const char *name,
int *count)
{
int fd;
struct ip_service *ret = NULL;
struct sockaddr_storage *return_ss = NULL;
int j, i, flags = 0;
NTSTATUS status;
*count = 0;
/* always try with wins first */
if (NT_STATUS_IS_OK(resolve_wins(name,0x20,&ret,count))) {
if ( *count == 0 )
return NULL;
return_ss = TALLOC_ARRAY(mem_ctx, struct sockaddr_storage,
*count);
if (return_ss == NULL ) {
free( ret );
return NULL;
}
/* copy the IP addresses */
for ( i=0; i<(*count); i++ )
return_ss[i] = ret[i].ss;
free( ret );
return return_ss;
}
fd = wins_lookup_open_socket_in();
if (fd == -1) {
return NULL;
}
/* uggh, we have to broadcast to each interface in turn */
for (j=iface_count() - 1;
j >= 0;
j--) {
const struct sockaddr_storage *bcast_ss = iface_n_bcast(j);
if (!bcast_ss) {
continue;
}
status = name_query(fd, name, 0x20, True, True,bcast_ss,
mem_ctx, &return_ss, count, &flags, NULL);
if (NT_STATUS_IS_OK(status)) {
break;
}
}
close(fd);
return return_ss;
}
/* Get hostname from IP */
void winbindd_wins_byip(struct winbindd_cli_state *state)
{
fstring response;
int i, count, maxlen, size;
struct node_status *status;
/* Ensure null termination */
state->request->data.winsreq[sizeof(state->request->data.winsreq)-1]='\0';
DEBUG(3, ("[%5lu]: wins_byip %s\n", (unsigned long)state->pid,
state->request->data.winsreq));
*response = '\0';
maxlen = sizeof(response) - 1;
if ((status = lookup_byaddr_backend(
state->mem_ctx, state->request->data.winsreq, &count))) {
size = strlen(state->request->data.winsreq);
if (size > maxlen) {
TALLOC_FREE(status);
request_error(state);
return;
}
fstrcat(response,state->request->data.winsreq);
fstrcat(response,"\t");
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) {
TALLOC_FREE(status);
request_error(state);
return;
}
fstrcat(response, status[i].name);
fstrcat(response, " ");
}
}
/* make last character a newline */
response[strlen(response)-1] = '\n';
TALLOC_FREE(status);
}
fstrcpy(state->response->data.winsresp,response);
request_ok(state);
}
/* Get IP from hostname */
void winbindd_wins_byname(struct winbindd_cli_state *state)
{
struct sockaddr_storage *ip_list = NULL;
int i, count, maxlen, size;
fstring response;
char addr[INET6_ADDRSTRLEN];
/* Ensure null termination */
state->request->data.winsreq[sizeof(state->request->data.winsreq)-1]='\0';
DEBUG(3, ("[%5lu]: wins_byname %s\n", (unsigned long)state->pid,
state->request->data.winsreq));
*response = '\0';
maxlen = sizeof(response) - 1;
ip_list = lookup_byname_backend(
state->mem_ctx, state->request->data.winsreq, &count);
if (ip_list != NULL){
for (i = count; i ; i--) {
print_sockaddr(addr, sizeof(addr), &ip_list[i-1]);
size = strlen(addr);
if (size > maxlen) {
TALLOC_FREE(ip_list);
request_error(state);
return;
}
if (i != 0) {
/* Clear out the newline character */
/* But only if there is something in there,
otherwise we clobber something in the stack */
if (strlen(response)) {
response[strlen(response)-1] = ' ';
}
}
fstrcat(response,addr);
fstrcat(response,"\t");
}
size = strlen(state->request->data.winsreq) + strlen(response);
if (size > maxlen) {
TALLOC_FREE(ip_list);
request_error(state);
return;
}
fstrcat(response,state->request->data.winsreq);
fstrcat(response,"\n");
TALLOC_FREE(ip_list);
} else {
request_error(state);
return;
}
fstrcpy(state->response->data.winsresp,response);
request_ok(state);
}
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