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/*
* Unix SMB/CIFS implementation.
* RPC client transport over a socket
* Copyright (C) Volker Lendecke 2009
*
* 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"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_CLI
struct rpc_transport_sock_state {
int fd;
};
static int rpc_transport_sock_state_destructor(struct rpc_transport_sock_state *s)
{
if (s->fd != -1) {
close(s->fd);
s->fd = -1;
}
return 0;
}
struct rpc_sock_read_state {
struct rpc_transport_sock_state *transp;
ssize_t received;
};
static void rpc_sock_read_done(struct tevent_req *subreq);
static struct async_req *rpc_sock_read_send(TALLOC_CTX *mem_ctx,
struct event_context *ev,
uint8_t *data, size_t size,
void *priv)
{
struct rpc_transport_sock_state *sock_transp = talloc_get_type_abort(
priv, struct rpc_transport_sock_state);
struct async_req *result;
struct tevent_req *subreq;
struct rpc_sock_read_state *state;
if (!async_req_setup(mem_ctx, &result, &state,
struct rpc_sock_read_state)) {
return NULL;
}
if (sock_transp->fd == -1) {
if (!async_post_ntstatus(result, ev, NT_STATUS_CONNECTION_INVALID)) {
goto fail;
}
return result;
}
state->transp = sock_transp;
subreq = async_recv_send(state, ev, sock_transp->fd, data, size, 0);
if (subreq == NULL) {
goto fail;
}
tevent_req_set_callback(subreq, rpc_sock_read_done, result);
return result;
fail:
TALLOC_FREE(result);
return NULL;
}
static void rpc_sock_read_done(struct tevent_req *subreq)
{
struct async_req *req =
tevent_req_callback_data(subreq, struct async_req);
struct rpc_sock_read_state *state = talloc_get_type_abort(
req->private_data, struct rpc_sock_read_state);
int err;
/* We must free subreq in this function as there is
a timer event attached to it. */
state->received = async_recv_recv(subreq, &err);
if (state->received == -1) {
if (state->transp->fd != -1) {
close(state->transp->fd);
state->transp->fd = -1;
}
TALLOC_FREE(subreq);
async_req_nterror(req, map_nt_error_from_unix(err));
return;
}
TALLOC_FREE(subreq);
async_req_done(req);
}
static NTSTATUS rpc_sock_read_recv(struct async_req *req, ssize_t *preceived)
{
struct rpc_sock_read_state *state = talloc_get_type_abort(
req->private_data, struct rpc_sock_read_state);
NTSTATUS status;
if (async_req_is_nterror(req, &status)) {
return status;
}
*preceived = state->received;
return NT_STATUS_OK;
}
struct rpc_sock_write_state {
struct rpc_transport_sock_state *transp;
ssize_t sent;
};
static void rpc_sock_write_done(struct tevent_req *subreq);
static struct async_req *rpc_sock_write_send(TALLOC_CTX *mem_ctx,
struct event_context *ev,
const uint8_t *data, size_t size,
void *priv)
{
struct rpc_transport_sock_state *sock_transp = talloc_get_type_abort(
priv, struct rpc_transport_sock_state);
struct async_req *result;
struct tevent_req *subreq;
struct rpc_sock_write_state *state;
if (!async_req_setup(mem_ctx, &result, &state,
struct rpc_sock_write_state)) {
return NULL;
}
if (sock_transp->fd == -1) {
if (!async_post_ntstatus(result, ev, NT_STATUS_CONNECTION_INVALID)) {
goto fail;
}
return result;
}
state->transp = sock_transp;
subreq = async_send_send(state, ev, sock_transp->fd, data, size, 0);
if (subreq == NULL) {
goto fail;
}
tevent_req_set_callback(subreq, rpc_sock_write_done, result);
return result;
fail:
TALLOC_FREE(result);
return NULL;
}
static void rpc_sock_write_done(struct tevent_req *subreq)
{
struct async_req *req =
tevent_req_callback_data(subreq, struct async_req);
struct rpc_sock_write_state *state = talloc_get_type_abort(
req->private_data, struct rpc_sock_write_state);
int err;
/* We must free subreq in this function as there is
a timer event attached to it. */
state->sent = async_send_recv(subreq, &err);
if (state->sent == -1) {
if (state->transp->fd != -1) {
close(state->transp->fd);
state->transp->fd = -1;
}
TALLOC_FREE(subreq);
async_req_nterror(req, map_nt_error_from_unix(err));
return;
}
TALLOC_FREE(subreq);
async_req_done(req);
}
static NTSTATUS rpc_sock_write_recv(struct async_req *req, ssize_t *psent)
{
struct rpc_sock_write_state *state = talloc_get_type_abort(
req->private_data, struct rpc_sock_write_state);
NTSTATUS status;
if (async_req_is_nterror(req, &status)) {
return status;
}
*psent = state->sent;
return NT_STATUS_OK;
}
NTSTATUS rpc_transport_sock_init(TALLOC_CTX *mem_ctx, int fd,
struct rpc_cli_transport **presult)
{
struct rpc_cli_transport *result;
struct rpc_transport_sock_state *state;
result = talloc(mem_ctx, struct rpc_cli_transport);
if (result == NULL) {
return NT_STATUS_NO_MEMORY;
}
state = talloc(result, struct rpc_transport_sock_state);
if (state == NULL) {
TALLOC_FREE(result);
return NT_STATUS_NO_MEMORY;
}
result->priv = state;
state->fd = fd;
talloc_set_destructor(state, rpc_transport_sock_state_destructor);
result->trans_send = NULL;
result->trans_recv = NULL;
result->write_send = rpc_sock_write_send;
result->write_recv = rpc_sock_write_recv;
result->read_send = rpc_sock_read_send;
result->read_recv = rpc_sock_read_recv;
*presult = result;
return NT_STATUS_OK;
}
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