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/*
** Copyright (C) 2006 Olivier DEMBOUR
** $Id: session.c,v 1.5.4.2 2010/02/11 16:06:38 dembour Exp $
**
**
** 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <string.h>
#include "mycrypto.h"
#include "server.h"
#include "myerror.h"
#include "queue.h"
#include "requests.h"
#include "auth.h"
#include "myrand.h"
#include "log.h"
/**
* @brief generate a new session number
* @param[in] conf configuration
* @note not really good
**/
static uint16_t new_sessionid(t_conf *conf)
{
uint16_t rand;
uint32_t try = (1<<16) * 2;
uint8_t bad = 0;
t_simple_list *client;
client = (t_simple_list *)conf->client;
while (!(rand = myrand()));
if (!client)
return (myrand());
do {
for (client = (t_simple_list *)conf->client; client; client = client->next)
{
if (client->session_id == rand)
bad = 1;
}
if (!bad)
return (rand);
while (!(rand = myrand()));
} while (try--);
return (0);
}
/**
* @brief create a session for an incoming (unauthenticated) client
* @param[in] conf configuration
* @param[in] req request
* @param[in] packet
* @retval client
* @retval -1 on error
**/
t_simple_list *create_session(t_conf *conf, t_request *req, t_packet *packet)
{
t_simple_list *client;
uint16_t rand;
if (!(rand = new_sessionid(conf)))
return (0);
client = (t_simple_list *)conf->client;
if (!client)
{
conf->client = list_create_simple_cell();
client = conf->client;
}
else
{
while (client->next)
client = client->next;
if (!(client->next = list_create_simple_cell()))
return (0);
client = client->next;
}
client->session_id = rand;
client->saved_queue = 0;
if (!(client->queue = init_queue()))
{
list_destroy_simple_cell(client);
LOG("No more memory\n");
return (0);
}
client->saved_queue = client->queue;
client->num_seq = 1;
client->sd_tcp = -1; /* No endpoint yet */
client_update_timer(client);
if ((packet->type & USE_COMPRESS) == USE_COMPRESS)
client->control.use_compress = 1;
LOG("Creating session id: 0x%x address = %u.%u.%u.%u (compression %s wanted)", client->session_id,
#ifndef WORDS_BIGENDIAN
(unsigned int) ((req->sa.sin_addr.s_addr) & 0xff),
(unsigned int) ((req->sa.sin_addr.s_addr >> 8) & 0xff),
(unsigned int) ((req->sa.sin_addr.s_addr >> 16) & 0xff),
(unsigned int) ((req->sa.sin_addr.s_addr >> 24) & 0xff)
#else
(unsigned int) ((req->sa.sin_addr.s_addr >> 24) & 0xff),
(unsigned int) ((req->sa.sin_addr.s_addr >> 16) & 0xff),
(unsigned int) ((req->sa.sin_addr.s_addr >> 8) & 0xff),
(unsigned int) ((req->sa.sin_addr.s_addr) & 0xff)
#endif
, client->control.use_compress ? "" :"NOT"
);
return (client);
}
/**
* @brief deal session request
* @param[in] conf configuration
* @param[in] request received
* @param[in] data packet structure received
* @retval 0 on success
* @retval -1 on error
**/
int session_request(t_conf *conf, t_request *req, t_data *data)
{
t_packet *packet;
t_simple_list *client;
if (data->len < PACKET_LEN)
return (-1);
packet = (void *)data->buffer;
data->buffer[data->len] = 0;
if (!req->cmd->authenticated)
return (req->cmd->deal_cmd(conf, req, packet, 0));
client = find_client_by_session_id(conf, packet->session_id);
/* ----- Authenticated user below ---- */
if ((!client) || (client->sd_tcp > 0))
{
packet->type = ERR;
return (send_ascii_reply(conf, req, packet, ERR_AUTH_FAILED));
}
if (client && client->control.authenticated)
/* deal_cmd is in request.c */
return (req->cmd->deal_cmd(conf, req, packet, client));
return (-1);
}
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