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/*
Unix SMB/CIFS implementation.
broadcast name resolution module
Copyright (C) Andrew Tridgell 2005
Copyright (C) Jelmer Vernooij 2007
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 "libcli/resolve/resolve.h"
#include "system/network.h"
#include "lib/socket/netif.h"
#include "param/param.h"
struct resolve_bcast_data {
struct interface *ifaces;
uint16_t nbt_port;
int nbt_timeout;
};
/**
broadcast name resolution method - async send
*/
struct composite_context *resolve_name_bcast_send(TALLOC_CTX *mem_ctx,
struct event_context *event_ctx,
void *userdata,
struct nbt_name *name)
{
int num_interfaces;
const char **address_list;
struct composite_context *c;
int i, count=0;
struct resolve_bcast_data *data = talloc_get_type(userdata, struct resolve_bcast_data);
num_interfaces = iface_count(data->ifaces);
address_list = talloc_array(mem_ctx, const char *, num_interfaces+1);
if (address_list == NULL) return NULL;
for (i=0;i<num_interfaces;i++) {
const char *bcast = iface_n_bcast(data->ifaces, i);
if (bcast == NULL) continue;
address_list[count] = talloc_strdup(address_list, bcast);
if (address_list[count] == NULL) {
talloc_free(address_list);
return NULL;
}
count++;
}
address_list[count] = NULL;
c = resolve_name_nbtlist_send(mem_ctx, event_ctx, name, address_list, data->ifaces, data->nbt_port, data->nbt_timeout, true, false);
talloc_free(address_list);
return c;
}
/*
broadcast name resolution method - recv side
*/
NTSTATUS resolve_name_bcast_recv(struct composite_context *c,
TALLOC_CTX *mem_ctx, const char **reply_addr)
{
NTSTATUS status = resolve_name_nbtlist_recv(c, mem_ctx, reply_addr);
if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
/* this makes much more sense for a bcast name resolution
timeout */
status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
return status;
}
/*
broadcast name resolution method - sync call
*/
NTSTATUS resolve_name_bcast(struct nbt_name *name,
TALLOC_CTX *mem_ctx,
struct interface *ifaces,
uint16_t nbt_port,
int nbt_timeout,
const char **reply_addr)
{
struct resolve_bcast_data *data = talloc(mem_ctx, struct resolve_bcast_data);
struct composite_context *c;
data->ifaces = talloc_reference(data, ifaces);
data->nbt_port = nbt_port;
data->nbt_timeout = nbt_timeout;
c = resolve_name_bcast_send(mem_ctx, NULL, data, name);
return resolve_name_bcast_recv(c, mem_ctx, reply_addr);
}
bool resolve_context_add_bcast_method(struct resolve_context *ctx, struct interface *ifaces, uint16_t nbt_port, int nbt_timeout)
{
struct resolve_bcast_data *data = talloc(ctx, struct resolve_bcast_data);
data->ifaces = ifaces;
data->nbt_port = nbt_port;
data->nbt_timeout = nbt_timeout;
return resolve_context_add_method(ctx, resolve_name_bcast_send, resolve_name_bcast_recv, data);
}
bool resolve_context_add_bcast_method_lp(struct resolve_context *ctx, struct loadparm_context *lp_ctx)
{
struct interface *ifaces;
load_interfaces(ctx, lp_interfaces(lp_ctx), &ifaces);
return resolve_context_add_bcast_method(ctx, ifaces, lp_nbt_port(lp_ctx), lp_parm_int(lp_ctx, NULL, "nbt", "timeout", 1));
}
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