xrdp/common/trans.h

/**
 * xrdp: A Remote Desktop Protocol server.
 *
 * Copyright (C) Jay Sorg 2004-2014
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * generic transport
 */

#if !defined(TRANS_H)
#define TRANS_H

#include "arch.h"
#include "parse.h"

#define TRANS_MODE_TCP 1
#define TRANS_MODE_UNIX 2

#define TRANS_TYPE_LISTENER 1
#define TRANS_TYPE_SERVER 2
#define TRANS_TYPE_CLIENT 3

#define TRANS_STATUS_DOWN 0
#define TRANS_STATUS_UP 1

struct trans; /* forward declaration */
struct xrdp_tls;

typedef int (DEFAULT_CC *ttrans_data_in)(struct trans* self);
typedef int (DEFAULT_CC *ttrans_conn_in)(struct trans* self,
                                         struct trans* new_self);
typedef int (DEFAULT_CC *tis_term)(void);
typedef int (APP_CC *trans_read_call) (struct trans *self, struct stream *in_s, int size);
typedef int (APP_CC *trans_write_call) (struct trans *self, struct stream *out_s);

struct trans
{
    tbus sck; /* socket handle */
    int mode; /* 1 tcp, 2 unix socket */
    int status;
    int type1; /* 1 listener 2 server 3 client */
    ttrans_data_in trans_data_in;
    ttrans_conn_in trans_conn_in;
    void* callback_data;
    int header_size;
    struct stream* in_s;
    struct stream* out_s;
    char* listen_filename;
    tis_term is_term; /* used to test for exit */
    struct stream* wait_s;
    char addr[256];
    char port[256];
    int no_stream_init_on_data_in;
    int extra_flags; /* user defined */
    struct xrdp_tls *tls;
    trans_read_call trans_read_call;
    trans_write_call trans_write_call;
};

/* xrdp_tls */
struct xrdp_tls
{
    void *ssl; /* SSL * */
    void *ctx; /* SSL_CTX * */
    char *cert;
    char *key;
    struct trans *trans;
};

/* xrdp_tls.c */
struct xrdp_tls *APP_CC
xrdp_tls_create(struct trans *trans, const char *key, const char *cert);
int APP_CC
xrdp_tls_accept(struct xrdp_tls *self);
int APP_CC
xrdp_tls_disconnect(struct xrdp_tls *self);
void APP_CC
xrdp_tls_delete(struct xrdp_tls *self);
int APP_CC
xrdp_tls_force_read_s(struct trans *self, struct stream *in_s, int size);
int APP_CC
xrdp_tls_force_write_s(struct trans *self, struct stream *out_s);

struct trans* APP_CC
trans_create(int mode, int in_size, int out_size);
void APP_CC
trans_delete(struct trans* self);
int APP_CC
trans_get_wait_objs(struct trans* self, tbus* objs, int* count);
int APP_CC
trans_get_wait_objs_rw(struct trans *self,
                       tbus *robjs, int *rcount,
                       tbus *wobjs, int *wcount);
int APP_CC
trans_check_wait_objs(struct trans* self);
int APP_CC
trans_force_read_s(struct trans* self, struct stream* in_s, int size);
int APP_CC
trans_force_write_s(struct trans* self, struct stream* out_s);
int APP_CC
trans_force_read(struct trans* self, int size);
int APP_CC
trans_force_write(struct trans* self);
int APP_CC
trans_write_copy(struct trans* self);
int APP_CC
trans_connect(struct trans* self, const char* server, const char* port,
              int timeout);
int APP_CC
trans_listen_address(struct trans* self, char* port, const char* address);
int APP_CC
trans_listen(struct trans* self, char* port);
struct stream* APP_CC
trans_get_in_s(struct trans* self);
struct stream* APP_CC
trans_get_out_s(struct trans* self, int size);
int APP_CC
trans_set_tls_mode(struct trans *self, const char *key, const char *cert);
int APP_CC
trans_shutdown_tls_mode(struct trans *self);
int APP_CC
trans_tcp_force_read_s(struct trans *self, struct stream *in_s, int size);
int APP_CC
trans_tcp_force_write_s(struct trans *self, struct stream *out_s);

#endif