/*
   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 2 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, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

   xrdp: A Remote Desktop Protocol server.
   Copyright (C) Jay Sorg 2005-2009
*/

/**
 *
 * @file libscp_v1c_mng.c
 * @brief libscp version 1 client api code - session management
 * @author Simone Fedele
 *
 */

#include "libscp_v1c_mng.h"

#include <stdlib.h>
#include <stdio.h>

extern struct log_config* s_log;

static enum SCP_CLIENT_STATES_E
_scp_v1c_mng_check_response(struct SCP_CONNECTION* c, struct SCP_SESSION* s);

/* client API */
/* 001 */
enum SCP_CLIENT_STATES_E
scp_v1c_mng_connect(struct SCP_CONNECTION* c, struct SCP_SESSION* s)
{
  tui8 sz;
  tui32 size;

  init_stream(c->out_s, c->out_s->size);
  init_stream(c->in_s, c->in_s->size);

  size = 12 + 4 + g_strlen(s->hostname) + g_strlen(s->username) +
         g_strlen(s->password);
  if (s->addr_type == SCP_ADDRESS_TYPE_IPV4)
  {
    size = size + 4;
  }
  else
  {
    size = size + 16;
  }

  /* sending request */

  /* header */
  out_uint32_be(c->out_s, 1); /* version */
  out_uint32_be(c->out_s, size);
  out_uint16_be(c->out_s, SCP_COMMAND_SET_MANAGE);
  out_uint16_be(c->out_s, SCP_CMD_MNG_LOGIN);

  /* data */
  sz = g_strlen(s->username);
  out_uint8(c->out_s, sz);
  out_uint8p(c->out_s, s->username, sz);
  sz = g_strlen(s->password);
  out_uint8(c->out_s, sz);
  out_uint8p(c->out_s, s->password, sz);

  /* address */
  out_uint8(c->out_s, s->addr_type);
  if (s->addr_type == SCP_ADDRESS_TYPE_IPV4)
  {
    out_uint32_be(c->out_s, s->ipv4addr);
  }
  else
  {
    out_uint8p(c->out_s, s->ipv6addr, 16);
  }

  /* hostname */
  sz = g_strlen(s->hostname);
  out_uint8(c->out_s, sz);
  out_uint8p(c->out_s, s->hostname, sz);

  if (0 != scp_tcp_force_send(c->in_sck, c->out_s->data, size))
  {
    log_message(s_log, LOG_LEVEL_WARNING, "[v1c_mng:%d] connection aborted: network error", __LINE__);
    return SCP_CLIENT_STATE_NETWORK_ERR;
  }

  /* wait for response */
  return _scp_v1c_mng_check_response(c, s);
}

/* 004 */
enum SCP_CLIENT_STATES_E
scp_v1c_mng_get_session_list(struct SCP_CONNECTION* c, int* scount,
                         struct SCP_DISCONNECTED_SESSION** s)
{
  tui32 version = 1;
  tui32 size = 12;
  tui16 cmd = SCP_CMD_MNG_LIST_REQ;       /* request session list */
  tui32 sescnt = 0;    /* total session number */
  tui32 sestmp = 0;    /* additional total session number */
  tui8 pktcnt = 0;     /* packet session count */
  tui32 totalcnt = 0;  /* session counter */
  tui8 continued = 0;  /* continue flag */
  int firstpkt = 1;    /* "first packet" flag */
  int idx;
  struct SCP_DISCONNECTED_SESSION* ds = 0;
//   tui8 addr[16];

  init_stream(c->out_s, c->out_s->size);

  /* we request session list */
  out_uint32_be(c->out_s, version);                 /* version */
  out_uint32_be(c->out_s, size);                    /* size    */
  out_uint16_be(c->out_s, SCP_COMMAND_SET_MANAGE); /* cmdset  */
  out_uint16_be(c->out_s, cmd);                     /* cmd     */

  if (0 != scp_tcp_force_send(c->in_sck, c->out_s->data, size))
  {
    log_message(s_log, LOG_LEVEL_WARNING, "[v1c_mng:%d] connection aborted: network error", __LINE__);
    return SCP_CLIENT_STATE_NETWORK_ERR;
  }

  do
  {
    /* then we wait for server response */
    init_stream(c->in_s, c->in_s->size);
    if (0 != scp_tcp_force_recv(c->in_sck, c->in_s->data, 8))
    {
      log_message(s_log, LOG_LEVEL_WARNING, "[v1c_mng:%d] connection aborted: network error", __LINE__);
      return SCP_CLIENT_STATE_NETWORK_ERR;
    }

    in_uint32_be(c->in_s, version);
    if (version != 1)
    {
      log_message(s_log, LOG_LEVEL_WARNING, "[v1c_mng:%d] connection aborted: version error", __LINE__);
      return SCP_CLIENT_STATE_VERSION_ERR;
    }

    in_uint32_be(c->in_s, size);
    if (size < 12)
    {
      log_message(s_log, LOG_LEVEL_WARNING, "[v1c_mng:%d] connection aborted: size error", __LINE__);
      return SCP_CLIENT_STATE_SIZE_ERR;
    }

    init_stream(c->in_s, c->in_s->size);
    if (0 != scp_tcp_force_recv(c->in_sck, c->in_s->data, size - 8))
    {
      log_message(s_log, LOG_LEVEL_WARNING, "[v1c_mng:%d] connection aborted: network error", __LINE__);
      return SCP_CLIENT_STATE_NETWORK_ERR;
    }

    in_uint16_be(c->in_s, cmd);
    if (cmd != SCP_COMMAND_SET_MANAGE)
    {
      log_message(s_log, LOG_LEVEL_WARNING, "[v1c_mng:%d] connection aborted: sequence error", __LINE__);
      return SCP_CLIENT_STATE_SEQUENCE_ERR;
    }

    in_uint16_be(c->in_s, cmd);
    if (cmd != SCP_CMD_MNG_LIST) /* session list */
    {
      log_message(s_log, LOG_LEVEL_WARNING, "[v1c_mng:%d] connection aborted: sequence error", __LINE__);
      return SCP_CLIENT_STATE_SEQUENCE_ERR;
    }

    if (firstpkt)
    {
      firstpkt = 0;
      in_uint32_be(c->in_s, sescnt);
      sestmp = sescnt;

      if (0 == sescnt)
      {
        /* return data... */
        (*scount) = sescnt;
        (*s) = NULL;

        LOG_DBG(s_log, "[v1c_mng] end list - no session on TS");
        return SCP_CLIENT_STATE_LIST_OK;
      }

      ds = g_malloc(sizeof(struct SCP_DISCONNECTED_SESSION) * sescnt, 0);
      if (ds == 0)
      {
        log_message(s_log, LOG_LEVEL_WARNING, "[v1c_mng:%d] connection aborted: internal error", __LINE__);
        return SCP_CLIENT_STATE_INTERNAL_ERR;
      }
    }
    else
    {
      in_uint32_be(c->in_s, sestmp);
    }
    in_uint8(c->in_s, continued);
    in_uint8(c->in_s, pktcnt);

    for (idx = 0; idx < pktcnt; idx++)
    {
      in_uint32_be(c->in_s, (ds[totalcnt]).SID); /* session id */
      in_uint8(c->in_s, (ds[totalcnt]).type);
      in_uint16_be(c->in_s, (ds[totalcnt]).height);
      in_uint16_be(c->in_s, (ds[totalcnt]).width);
      in_uint8(c->in_s, (ds[totalcnt]).bpp);
      in_uint8(c->in_s, (ds[totalcnt]).idle_days);
      in_uint8(c->in_s, (ds[totalcnt]).idle_hours);
      in_uint8(c->in_s, (ds[totalcnt]).idle_minutes);

      in_uint16_be(c->in_s, (ds[totalcnt]).conn_year);
      in_uint8(c->in_s, (ds[totalcnt]).conn_month);
      in_uint8(c->in_s, (ds[totalcnt]).conn_day);
      in_uint8(c->in_s, (ds[totalcnt]).conn_hour);
      in_uint8(c->in_s, (ds[totalcnt]).conn_minute);
      in_uint8(c->in_s, (ds[totalcnt]).addr_type);
      if ((ds[totalcnt]).addr_type == SCP_ADDRESS_TYPE_IPV4)
      {
        in_uint32_be(c->in_s, (ds[totalcnt]).ipv4addr);
      }
      if ((ds[totalcnt]).addr_type == SCP_ADDRESS_TYPE_IPV6)
      {
        in_uint8a(c->in_s, (ds[totalcnt]).ipv6addr, 16);
      }
      totalcnt++;
    }
  }
  while (continued);

  /* return data... */
  (*scount) = sescnt;
  (*s) = ds;

  LOG_DBG(s_log, "[v1c_mng] end list");
  return SCP_CLIENT_STATE_LIST_OK;
}

/* 043 * /
enum SCP_CLIENT_STATES_E
scp_v1c_select_session(struct SCP_CONNECTION* c, struct SCP_SESSION* s,
                       SCP_SID sid)
{
  tui32 version = 1;
  tui32 size = 16;
  tui16 cmd = 43;

  init_stream(c->out_s, c->out_s->size);

  / * sending our selection * /
  out_uint32_be(c->out_s, version);                 / * version * /
  out_uint32_be(c->out_s, size);                    / * size    * /
  out_uint16_be(c->out_s, SCP_COMMAND_SET_DEFAULT); / * cmdset  * /
  out_uint16_be(c->out_s, cmd);                     / * cmd     * /

  out_uint32_be(c->out_s, sid);

  if (0 != scp_tcp_force_send(c->in_sck, c->out_s->data, size))
  {
    return SCP_CLIENT_STATE_NETWORK_ERR;
  }

  / * waiting for response.... * /
  init_stream(c->in_s, c->in_s->size);
  if (0 != scp_tcp_force_recv(c->in_sck, c->in_s->data, 8))
  {
    return SCP_CLIENT_STATE_NETWORK_ERR;
  }

  in_uint32_be(c->in_s, version);
  if (version != 1)
  {
    return SCP_CLIENT_STATE_VERSION_ERR;
  }

  in_uint32_be(c->in_s, size);
  if (size < 12)
  {
    return SCP_CLIENT_STATE_SIZE_ERR;
  }

  init_stream(c->in_s, c->in_s->size);
  / * read the rest of the packet * /
  if (0 != scp_tcp_force_recv(c->in_sck, c->in_s->data, size - 8))
  {
    return SCP_CLIENT_STATE_NETWORK_ERR;
  }

  in_uint16_be(c->in_s, cmd);
  if (cmd != SCP_COMMAND_SET_DEFAULT)
  {
    return SCP_CLIENT_STATE_SEQUENCE_ERR;
  }

  in_uint16_be(c->in_s, cmd);
  if (cmd != 46)
  {
    return SCP_CLIENT_STATE_SEQUENCE_ERR;
  }

  / * session display * /
  in_uint16_be(c->in_s, (s->display));
  / *we don't need to return any data other than the display * /
  / *because we already sent that                            * /

  return SCP_CLIENT_STATE_OK;
}*/

/* 044 * /
enum SCP_CLIENT_STATES_E
scp_v1c_select_session_cancel(struct SCP_CONNECTION* c)
{
  tui32 version = 1;
  tui32 size = 12;
  tui16 cmd = 44;

  init_stream(c->out_s, c->out_s->size);

  / * sending our selection * /
  out_uint32_be(c->out_s, version);                 / * version * /
  out_uint32_be(c->out_s, size);                    / * size    * /
  out_uint16_be(c->out_s, SCP_COMMAND_SET_DEFAULT); / * cmdset  * /
  out_uint16_be(c->out_s, cmd);                     / * cmd     * /

  if (0 != scp_tcp_force_send(c->in_sck, c->out_s->data, size))
  {
    return SCP_CLIENT_STATE_NETWORK_ERR;
  }

  return SCP_CLIENT_STATE_END;
}*/

static enum SCP_CLIENT_STATES_E
_scp_v1c_mng_check_response(struct SCP_CONNECTION* c, struct SCP_SESSION* s)
{
  tui32 version;
  tui32 size;
  tui16 cmd;
  tui8 dim;
  char buf[257];

  init_stream(c->in_s, c->in_s->size);
  if (0 != scp_tcp_force_recv(c->in_sck, c->in_s->data, 8))
  {
    log_message(s_log, LOG_LEVEL_WARNING, "[v1c_mng:%d] connection aborted: network error", __LINE__);
    return SCP_CLIENT_STATE_NETWORK_ERR;
  }

  in_uint32_be(c->in_s, version);
  if (version != 1)
  {
    log_message(s_log, LOG_LEVEL_WARNING, "[v1c_mng:%d] connection aborted: version error", __LINE__);
    return SCP_CLIENT_STATE_VERSION_ERR;
  }

  in_uint32_be(c->in_s, size);

  init_stream(c->in_s, c->in_s->size);
  /* read the rest of the packet */
  if (0 != scp_tcp_force_recv(c->in_sck, c->in_s->data, size - 8))
  {
    log_message(s_log, LOG_LEVEL_WARNING, "[v1c_mng:%d] connection aborted: network error", __LINE__);
    return SCP_CLIENT_STATE_NETWORK_ERR;
  }

  in_uint16_be(c->in_s, cmd);
  if (cmd != SCP_COMMAND_SET_MANAGE)
  {
    log_message(s_log, LOG_LEVEL_WARNING, "[v1c_mng:%d] connection aborted: sequence error", __LINE__);
    return SCP_CLIENT_STATE_SEQUENCE_ERR;
  }

  in_uint16_be(c->in_s, cmd)
  if (cmd == SCP_CMD_MNG_LOGIN_ALLOW) /* connection ok */
  {
    log_message(s_log, LOG_LEVEL_INFO, "[v1c_mng:%d] connection ok", __LINE__);
    return SCP_CLIENT_STATE_OK;
  }
  else if (cmd == SCP_CMD_MNG_LOGIN_DENY) /* connection denied */
  {
    in_uint8(c->in_s, dim);
    buf[dim]='\0';
    in_uint8a(c->in_s, buf, dim);
    scp_session_set_errstr(s, buf);

    log_message(s_log, LOG_LEVEL_INFO, "[v1c_mng:%d] connection denied: %s", __LINE__ , s->errstr);
    return SCP_CLIENT_STATE_CONNECTION_DENIED;
  }

  log_message(s_log, LOG_LEVEL_WARNING, "[v1c-mng:%d] connection aborted: sequence error", __LINE__);
  return SCP_CLIENT_STATE_SEQUENCE_ERR;
}