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/*
Unix SMB/CIFS implementation.
SMB client socket context management functions
Copyright (C) Andrew Tridgell 1994-2005
Copyright (C) James Myers 2003 <myersjj@samba.org>
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 "lib/events/events.h"
#include "libcli/raw/libcliraw.h"
#include "libcli/composite/composite.h"
#include "lib/socket/socket.h"
#include "libcli/resolve/resolve.h"
#include "param/param.h"
#include "libcli/raw/raw_proto.h"
struct sock_connect_state {
struct composite_context *ctx;
const char *host_name;
int num_ports;
uint16_t *ports;
const char *socket_options;
struct smbcli_socket *result;
};
/*
connect a smbcli_socket context to an IP/port pair
if port is 0 then choose 445 then 139
*/
static void smbcli_sock_connect_recv_conn(struct composite_context *ctx);
struct composite_context *smbcli_sock_connect_send(TALLOC_CTX *mem_ctx,
const char *host_addr,
const char **ports,
const char *host_name,
struct resolve_context *resolve_ctx,
struct tevent_context *event_ctx,
const char *socket_options)
{
struct composite_context *result, *ctx;
struct sock_connect_state *state;
int i;
result = talloc_zero(mem_ctx, struct composite_context);
if (result == NULL) goto failed;
result->state = COMPOSITE_STATE_IN_PROGRESS;
result->event_ctx = event_ctx;
if (result->event_ctx == NULL) goto failed;
state = talloc(result, struct sock_connect_state);
if (state == NULL) goto failed;
state->ctx = result;
result->private_data = state;
state->host_name = talloc_strdup(state, host_name);
if (state->host_name == NULL) goto failed;
state->num_ports = str_list_length(ports);
state->ports = talloc_array(state, uint16_t, state->num_ports);
if (state->ports == NULL) goto failed;
for (i=0;ports[i];i++) {
state->ports[i] = atoi(ports[i]);
}
state->socket_options = talloc_reference(state, socket_options);
if (!host_addr) {
host_addr = host_name;
}
ctx = socket_connect_multi_send(state, host_addr,
state->num_ports, state->ports,
resolve_ctx,
state->ctx->event_ctx);
if (ctx == NULL) goto failed;
ctx->async.fn = smbcli_sock_connect_recv_conn;
ctx->async.private_data = state;
return result;
failed:
talloc_free(result);
return NULL;
}
static void smbcli_sock_connect_recv_conn(struct composite_context *ctx)
{
struct sock_connect_state *state =
talloc_get_type(ctx->async.private_data,
struct sock_connect_state);
struct socket_context *sock;
uint16_t port;
state->ctx->status = socket_connect_multi_recv(ctx, state, &sock,
&port);
if (!composite_is_ok(state->ctx)) return;
state->ctx->status =
socket_set_option(sock, state->socket_options, NULL);
if (!composite_is_ok(state->ctx)) return;
state->result = talloc_zero(state, struct smbcli_socket);
if (composite_nomem(state->result, state->ctx)) return;
state->result->sock = talloc_steal(state->result, sock);
state->result->port = port;
state->result->hostname = talloc_steal(sock, state->host_name);
state->result->event.ctx = state->ctx->event_ctx;
if (composite_nomem(state->result->event.ctx, state->ctx)) return;
composite_done(state->ctx);
}
/*
finish a smbcli_sock_connect_send() operation
*/
NTSTATUS smbcli_sock_connect_recv(struct composite_context *c,
TALLOC_CTX *mem_ctx,
struct smbcli_socket **result)
{
NTSTATUS status = composite_wait(c);
if (NT_STATUS_IS_OK(status)) {
struct sock_connect_state *state =
talloc_get_type(c->private_data,
struct sock_connect_state);
*result = talloc_steal(mem_ctx, state->result);
}
talloc_free(c);
return status;
}
/*
connect a smbcli_socket context to an IP/port pair
if port is 0 then choose the ports listed in smb.conf (normally 445 then 139)
sync version of the function
*/
NTSTATUS smbcli_sock_connect(TALLOC_CTX *mem_ctx,
const char *host_addr, const char **ports,
const char *host_name,
struct resolve_context *resolve_ctx,
struct tevent_context *event_ctx,
const char *socket_options,
struct smbcli_socket **result)
{
struct composite_context *c =
smbcli_sock_connect_send(mem_ctx, host_addr, ports, host_name,
resolve_ctx,
event_ctx, socket_options);
return smbcli_sock_connect_recv(c, mem_ctx, result);
}
/****************************************************************************
mark the socket as dead
****************************************************************************/
_PUBLIC_ void smbcli_sock_dead(struct smbcli_socket *sock)
{
talloc_free(sock->event.fde);
sock->event.fde = NULL;
talloc_free(sock->sock);
sock->sock = NULL;
}
/****************************************************************************
Set socket options on a open connection.
****************************************************************************/
void smbcli_sock_set_options(struct smbcli_socket *sock, const char *options)
{
socket_set_option(sock->sock, options, NULL);
}
/****************************************************************************
resolve a hostname and connect
****************************************************************************/
_PUBLIC_ struct smbcli_socket *smbcli_sock_connect_byname(const char *host, const char **ports,
TALLOC_CTX *mem_ctx,
struct resolve_context *resolve_ctx,
struct tevent_context *event_ctx,
const char *socket_options)
{
int name_type = NBT_NAME_SERVER;
const char *address;
NTSTATUS status;
struct nbt_name nbt_name;
char *name, *p;
TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
struct smbcli_socket *result;
if (event_ctx == NULL) {
DEBUG(0, ("Invalid NULL event context passed in as parameter\n"));
return NULL;
}
if (tmp_ctx == NULL) {
DEBUG(0, ("talloc_new failed\n"));
return NULL;
}
name = talloc_strdup(tmp_ctx, host);
if (name == NULL) {
DEBUG(0, ("talloc_strdup failed\n"));
talloc_free(tmp_ctx);
return NULL;
}
/* allow hostnames of the form NAME#xx and do a netbios lookup */
if ((p = strchr(name, '#'))) {
name_type = strtol(p+1, NULL, 16);
*p = 0;
}
make_nbt_name(&nbt_name, host, name_type);
status = resolve_name_ex(resolve_ctx, 0, 0, &nbt_name, tmp_ctx, &address, event_ctx);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(tmp_ctx);
return NULL;
}
status = smbcli_sock_connect(mem_ctx, address, ports, name, resolve_ctx,
event_ctx,
socket_options, &result);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(9, ("smbcli_sock_connect failed: %s\n",
nt_errstr(status)));
talloc_free(tmp_ctx);
return NULL;
}
talloc_free(tmp_ctx);
return result;
}
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