static void FreeModbusData(void *data)
{
modbus_session_data_t *session = (modbus_session_data_t *)data;
modbus_config_t *config = NULL;
if (session == NULL)
return;
if (session->context_id != NULL)
{
config = (modbus_config_t *)sfPolicyUserDataGet(session->context_id, session->policy_id);
}
if (config != NULL)
{
config->ref_count--;
if ((config->ref_count == 0) &&
(session->context_id != modbus_context_id))
{
sfPolicyUserDataClear(session->context_id, session->policy_id);
free(config);
if (sfPolicyUserPolicyGetActive(session->context_id) == 0)
{
/* No more outstanding configs - free the config array */
ModbusFreeConfig(session->context_id);
}
}
}
free(session);
}
/*
* Function: FTPFreeSession(void *preproc_session)
*
* Purpose: This function frees the data that is associated with a session.
*
* Arguments: preproc_session => pointer to the session to free
*
* Returns: None
*/
static void FTPFreeSession(void *preproc_session)
{
FTP_SESSION *ssn = (FTP_SESSION *)preproc_session;
FTPTELNET_GLOBAL_CONF *pPolicyConfig = NULL;
if (ssn == NULL)
return;
pPolicyConfig = (FTPTELNET_GLOBAL_CONF *)sfPolicyUserDataGet(ssn->global_conf, ssn->policy_id);
if (pPolicyConfig != NULL)
{
pPolicyConfig->ref_count--;
if ((pPolicyConfig->ref_count == 0) &&
(ssn->global_conf != ftp_telnet_config))
{
sfPolicyUserDataClear (ssn->global_conf, ssn->policy_id);
FTPTelnetFreeConfig(pPolicyConfig);
if (sfPolicyUserPolicyGetActive(ssn->global_conf) == 0)
FTPTelnetFreeConfigs(ssn->global_conf);
}
}
if (ssn->filename)
{
free(ssn->filename);
}
free(ssn);
}
/* Registered as a callback with our SSH data blocks when
* they are added to the underlying stream session. Called
* by the stream preprocessor when a session is about to be
* destroyed.
*
* PARAMETERS:
*
* idatap: Pointer to the moribund data.
*
* RETURNS: Nothing.
*/
static void
FreeSSHData( void* idatap )
{
SSHData *ssn = (SSHData *)idatap;
SSHConfig *config = NULL;
if (ssn == NULL)
return;
if (ssn->config != NULL)
{
config = (SSHConfig *)sfPolicyUserDataGet(ssn->config, ssn->policy_id);
}
if (config != NULL)
{
config->ref_count--;
if ((config->ref_count == 0) &&
(ssn->config != ssh_config))
{
sfPolicyUserDataClear (ssn->config, ssn->policy_id);
free(config);
if (sfPolicyUserPolicyGetActive(ssn->config) == 0)
{
/* No more outstanding configs - free the config array */
SSHFreeConfig(ssn->config);
}
}
}
free(ssn);
}
static void FreeDNP3Data(void *bucket)
{
MemBucket *tmp_bucket = (MemBucket *)bucket;
dnp3_session_data_t *session;
dnp3_config_t *config = NULL;
if ((tmp_bucket == NULL) || (tmp_bucket->data == NULL))
return;
session = tmp_bucket->data;
if (session->context_id != NULL)
{
config = (dnp3_config_t *)sfPolicyUserDataGet(session->context_id, session->policy_id);
}
if (config != NULL)
{
config->ref_count--;
if ((config->ref_count == 0) &&
(session->context_id != dnp3_context_id))
{
sfPolicyUserDataClear(session->context_id, session->policy_id);
free(config);
if (sfPolicyUserPolicyGetActive(session->context_id) == 0)
{
/* No more outstanding configs - free the config array */
DNP3FreeConfig(session->context_id);
}
}
}
mempool_free(dnp3_mempool, tmp_bucket);
}
/*
* Function: FTPFreeSession(void *preproc_session)
*
* Purpose: This function frees the data that is associated with a session.
*
* Arguments: preproc_session => pointer to the session to free
*
* Returns: None
*/
static void FTPFreeSession(void *preproc_session)
{
FTP_SESSION *ssn = (FTP_SESSION *)preproc_session;
FTPTELNET_GLOBAL_CONF *pPolicyConfig = NULL;
ssl_callback_interface_t *ssl_cb = (ssl_callback_interface_t *)_dpd.getSSLCallback();
if (ssn == NULL)
return;
pPolicyConfig = (FTPTELNET_GLOBAL_CONF *)sfPolicyUserDataGet(ssn->global_conf, ssn->policy_id);
if (pPolicyConfig != NULL)
{
pPolicyConfig->ref_count--;
if ((pPolicyConfig->ref_count == 0) &&
(ssn->global_conf != ftp_telnet_config))
{
sfPolicyUserDataClear (ssn->global_conf, ssn->policy_id);
FTPTelnetFreeConfig(pPolicyConfig);
if (sfPolicyUserPolicyGetActive(ssn->global_conf) == 0)
FTPTelnetFreeConfigs(ssn->global_conf);
}
}
if (ssn->filename)
{
free(ssn->filename);
}
if ( ssl_cb )
ssl_cb->session_free(ssn->flow_id);
free(ssn);
}
/*********************************************************************
* Function: DCE2_ReloadSwap()
*
* Purpose: Swaps a new config for the old one.
*
* Arguments: None
*
* Returns: None
*
*********************************************************************/
static void * DCE2_ReloadSwap(void)
{
tSfPolicyUserContextId old_config = dce2_config;
if (dce2_swap_config == NULL)
return NULL;
dce2_config = dce2_swap_config;
dce2_swap_config = NULL;
sfPolicyUserDataIterate (old_config, DCE2_ReloadSwapPolicy);
if (sfPolicyUserPolicyGetActive(old_config) == 0)
return (void *)old_config;
return NULL;
}
static void * SIPReloadSwap(struct _SnortConfig *sc, void *swap_config)
{
tSfPolicyUserContextId sip_swap_config = (tSfPolicyUserContextId)swap_config;
tSfPolicyUserContextId old_config = sip_config;
if (sip_swap_config == NULL)
return NULL;
sip_config = sip_swap_config;
sfPolicyUserDataFreeIterate (old_config, SIPFreeUnusedConfigPolicy);
if (sfPolicyUserPolicyGetActive(old_config) == 0)
{
/* No more outstanding configs - free the config array */
return (void *)old_config;
}
return NULL;
}
static void * SSHReloadSwap(void)
{
tSfPolicyUserContextId old_config = ssh_config;
if (ssh_swap_config == NULL)
return NULL;
ssh_config = ssh_swap_config;
ssh_swap_config = NULL;
sfPolicyUserDataIterate (old_config, SshFreeUnusedConfigPolicy);
if (sfPolicyUserPolicyGetActive(old_config) == 0)
{
/* No more outstanding configs - free the config array */
return (void *)old_config;
}
return NULL;
}
static void * ModbusReloadSwap(void)
{
tSfPolicyUserContextId old_context_id = modbus_context_id;
if (modbus_swap_context_id == NULL)
return NULL;
modbus_context_id = modbus_swap_context_id;
modbus_swap_context_id = NULL;
sfPolicyUserDataIterate(old_context_id, ModbusFreeUnusedConfigPolicy);
if (sfPolicyUserPolicyGetActive(old_context_id) == 0)
{
/* No more outstanding configs - free the config array */
return (void *)old_context_id;
}
return NULL;
}
static void * DNP3ReloadSwap(struct _SnortConfig *sc, void *swap_config)
{
tSfPolicyUserContextId dnp3_swap_context_id = (tSfPolicyUserContextId)swap_config;
tSfPolicyUserContextId old_context_id = dnp3_context_id;
if (dnp3_swap_context_id == NULL)
return NULL;
dnp3_context_id = dnp3_swap_context_id;
sfPolicyUserDataFreeIterate(old_context_id, DNP3FreeUnusedConfigPolicy);
if (sfPolicyUserPolicyGetActive(old_context_id) == 0)
{
/* No more outstanding configs - free the config array */
return (void *)old_context_id;
}
return NULL;
}
/***********************************************************************
* Registered as a callback with our SIP data blocks when
* they are added to the underlying stream session. Called
* by the stream preprocessor when a session is about to be
* destroyed.
*
* PARAMETERS:
*
* idatap: Pointer to the moribund data.
*
* RETURNS: Nothing.
***********************************************************************/
static void FreeSIPData( void* idatap )
{
SIPData *ssn = (SIPData *)idatap;
SIPConfig *config = NULL;
if (ssn == NULL)
return;
if (numSessions > 0)
numSessions--;
/*Free all the dialog data*/
sip_freeDialogs(&ssn->dialogs);
/*Clean the configuration data*/
if (ssn->config != NULL)
{
config = (SIPConfig *)sfPolicyUserDataGet(ssn->config, ssn->policy_id);
}
if (config == NULL)
{
free(ssn);
return;
}
config->ref_count--;
if ((config->ref_count == 0) && (ssn->config != sip_config))
{
sfPolicyUserDataClear (ssn->config, ssn->policy_id);
free(config);
if (sfPolicyUserPolicyGetActive(ssn->config) == 0)
{
/* No more outstanding configs - free the config array */
SIPFreeConfig(ssn->config);
}
}
free(ssn);
}
/***********************************************************************
* Registered as a callback with our GTP data blocks when
* they are added to the underlying stream session. Called
* by the stream preprocessor when a session is about to be
* destroyed.
*
* PARAMETERS:
*
* idatap: Pointer to the moribund data.
*
* RETURNS: Nothing.
***********************************************************************/
static void FreeGTPData( void* idatap )
{
GTPData *ssn = (GTPData *)idatap;
GTPConfig *config = NULL;
if (ssn == NULL)
return;
if (numSessions > 0)
numSessions--;
/*Clean the configuration data*/
if (ssn->config != NULL)
{
config = (GTPConfig *)sfPolicyUserDataGet(ssn->config, ssn->policy_id);
}
if (config == NULL)
{
free(ssn);
return;
}
config->ref_count--;
if ((config->ref_count == 0) && (ssn->config != gtp_config))
{
sfPolicyUserDataClear (ssn->config, ssn->policy_id);
free(config);
if (sfPolicyUserPolicyGetActive(ssn->config) == 0)
{
/* No more outstanding configs - free the config array */
GTPFreeConfig(ssn->config);
}
}
free(ssn);
}
int RemoveLWSession(Stream5SessionCache *sessionCache, Stream5LWSession *ssn)
{
Stream5Config *pPolicyConfig = NULL;
tSfPolicyId policy_id = ssn->policy_id;
mempool_free(&s5FlowMempool, ssn->flowdata);
ssn->flowdata = NULL;
pPolicyConfig = (Stream5Config *)sfPolicyUserDataGet(ssn->config, policy_id);
if (pPolicyConfig != NULL)
{
pPolicyConfig->ref_count--;
if ((pPolicyConfig->ref_count == 0) && (ssn->config != s5_config))
{
sfPolicyUserDataClear (ssn->config, policy_id);
Stream5FreeConfig(pPolicyConfig);
if (sfPolicyUserPolicyGetActive(ssn->config) == 0)
Stream5FreeConfigs(ssn->config);
}
}
return sfxhash_remove(sessionCache->hashTable, &(ssn->key));
}
