xrdp/sesman/libscp/libscp_connection.c

/**
 * xrdp: A Remote Desktop Protocol server.
 *
 * Copyright (C) Jay Sorg 2004-2012
 *
 * 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.
 */

/**
 *
 * @file libscp_connection.c
 * @brief SCP_CONNECTION handling code
 * @author Simone Fedele
 *
 */

#if defined(HAVE_CONFIG_H)
#include <config_ac.h>
#endif

#include "libscp_connection.h"
#include "string_calls.h"
#include "trans.h"

/*****************************************************************************/
struct trans *
scp_connect(const char *host, const  char *port,
            tis_term term_func,
            ttrans_data_in data_in_func,
            void *callback_data)
{
    struct trans *t = trans_create(TRANS_MODE_TCP, 8192, 8192);
    int index;

    if (host == NULL)
    {
        host = "localhost";
    }

    if (port == NULL)
    {
        port = "3350";
    }

    t->is_term = term_func;

    t->trans_data_in = data_in_func;
    t->header_size = 8;
    t->no_stream_init_on_data_in = 1;
    t->callback_data = callback_data;

    /* try to connect up to 4 times
     *
     * term_func can be NULL, so check before calling it */
    index = 4;
    while (trans_connect(t, host, port, 3000) != 0 &&
            !(term_func && term_func()) &&
            --index > 0)
    {
        g_sleep(1000);
        LOG_DEVEL(LOG_LEVEL_DEBUG, "Connect failed. Trying again...");
    }

    if (t->status != TRANS_STATUS_UP)
    {
        trans_delete(t);
        t = NULL;
    }

    return t;
}

/*****************************************************************************/

const char *
scp_client_state_to_str(enum SCP_CLIENT_STATES_E e)
{
    const char *result = "SCP_CLIENT_STATE_????";

    /* Some compilers will warn if this switch is missing states */
    switch (e)
    {
        case SCP_CLIENT_STATE_OK:
            result = "SCP_CLIENT_STATE_OK";
            break;
        case SCP_CLIENT_STATE_NETWORK_ERR:
            result = "SCP_CLIENT_STATE_NETWORK_ERR";
            break;
        case SCP_CLIENT_STATE_VERSION_ERR:
            result = "SCP_CLIENT_STATE_VERSION_ERR";
            break;
        case SCP_CLIENT_STATE_SEQUENCE_ERR:
            result = "SCP_CLIENT_STATE_SEQUENCE_ERR";
            break;
        case SCP_CLIENT_STATE_SIZE_ERR:
            result = "SCP_CLIENT_STATE_SIZE_ERR";
            break;
        case SCP_CLIENT_STATE_INTERNAL_ERR:
            result = "SCP_CLIENT_STATE_INTERNAL_ERR";
            break;
        case SCP_CLIENT_STATE_SESSION_LIST:
            result = "SCP_CLIENT_STATE_SESSION_LIST";
            break;
        case SCP_CLIENT_STATE_LIST_OK:
            result = "SCP_CLIENT_STATE_LIST_OK";
            break;
        case SCP_CLIENT_STATE_RESEND_CREDENTIALS:
            result = "SCP_CLIENT_STATE_RESEND_CREDENTIALS";
            break;
        case SCP_CLIENT_STATE_CONNECTION_DENIED:
            result = "SCP_CLIENT_STATE_CONNECTION_DENIED";
            break;
        case SCP_CLIENT_STATE_PWD_CHANGE_REQ:
            result = "SCP_CLIENT_STATE_PWD_CHANGE_REQ";
            break;
        case SCP_CLIENT_STATE_RECONNECT_SINGLE:
            result = "SCP_CLIENT_STATE_RECONNECT_SINGLE";
            break;
        case SCP_CLIENT_STATE_SELECTION_CANCEL:
            result = "SCP_CLIENT_STATE_SELECTION_CANCEL";
            break;
        case SCP_CLIENT_STATE_END:
            result = "SCP_CLIENT_STATE_END";
            break;
    }

    return result;
}