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a14443119f6ce38978f71451943cdd4edb177a40
xrdp/sesman/session_list.c
T
matt335672 cd98b013f1 Add logging of connect/disconnect times 
on connection, client IP and name are passed from xrdp to sesman to
sesexec, and then back to sesman again.

xrdp-sesadmin can now access the connection data from sesman
2025-07-21 11:30:14 +01:00

458 lines
12 KiB
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/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Jay Sorg 2004-2015
*
* BSD process grouping by:
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland.
* Copyright (c) 2000-2001 Markus Friedl.
* Copyright (c) 2011-2015 Koichiro Iwao, Kyushu Institute of Technology.
*
* 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 session_list.c
* @brief Session list management code
* @author Jay Sorg, Simone Fedele
*
*/
#if defined(HAVE_CONFIG_H)
#include "config_ac.h"
#endif
#include "arch.h"
#include "session_list.h"
#include "trans.h"
#include "sesman_config.h"
#include "list.h"
#include "log.h"
#include "os_calls.h"
#include "sesman.h"
#include "set_int.h"
#include "string_calls.h"
#include "xrdp_sockets.h"
static struct list *g_session_list = NULL;
#define SESSION_IN_USE(si) \
((si) != NULL && \
(si)->sesexec_trans != NULL && \
(si)->sesexec_trans->status == TRANS_STATUS_UP)
/******************************************************************************/
int
session_list_init(void)
{
int rv = 0;
if (g_session_list == NULL)
{
g_session_list = list_create_sized(g_cfg->sess.max_sessions);
if (g_session_list == NULL)
{
LOG(LOG_LEVEL_ERROR, "Can't allocate session list");
rv = 1;
}
else
{
g_session_list->auto_free = 0;
}
}
return rv;
}
/******************************************************************************/
/**
* Frees resources allocated to a session_item
*
* @param si Session item
*
* @note Any pointer to this item on g_session_list will be invalid
* after this call.
*/
static void
free_session(struct session_item *si)
{
if (si != NULL)
{
if (si->sesexec_trans != NULL)
{
trans_delete(si->sesexec_trans);
}
g_free(si);
}
}
/******************************************************************************/
void
session_list_cleanup(void)
{
if (g_session_list != NULL)
{
int i;
for (i = 0 ; i < g_session_list->count ; ++i)
{
struct session_item *si;
si = (struct session_item *)list_get_item(g_session_list, i);
free_session(si);
}
list_delete(g_session_list);
g_session_list = NULL;
}
}
/******************************************************************************/
unsigned int
session_list_get_count(void)
{
return (g_session_list == NULL) ? 0 : g_session_list->count;
}
/******************************************************************************/
unsigned int
session_list_get_count_by_state(enum session_state state)
{
unsigned int result = 0;
int i;
for (i = 0 ; i < g_session_list->count ; ++i)
{
struct session_item *si;
si = (struct session_item *)list_get_item(g_session_list, i);
if (si->state == state)
{
++result;
}
}
return result;
}
/******************************************************************************/
struct session_item *
session_list_new(void)
{
struct session_item *result = g_new0(struct session_item, 1);
if (result != NULL)
{
result->state = E_SESSION_STARTING;
if (!list_add_item(g_session_list, (tintptr)result))
{
g_free(result);
result = NULL;
}
}
return result;
}
/******************************************************************************/
void
session_list_get_session_displays(struct set_int *alloc_displays)
{
int count = (g_session_list == NULL) ? 0 : g_session_list->count;
int i = 0;
for (i = 0 ; i < count ; ++i)
{
struct session_item *si;
si = (struct session_item *)list_get_item(g_session_list, i);
if (SESSION_IN_USE(si))
{
set_int_add(alloc_displays, si->display);
}
}
}
/******************************************************************************/
struct session_item *
session_list_get_bydata(uid_t uid,
enum scp_session_type type,
unsigned short width,
unsigned short height,
unsigned char bpp,
const char *ip_addr)
{
char policy_str[64];
int policy = g_cfg->sess.policy;
int i;
if (ip_addr == NULL)
{
ip_addr = "";
}
if ((policy & SESMAN_CFG_SESS_POLICY_DEFAULT) != 0)
{
/* Before xrdp v0.9.14, the default
* session policy varied by type. If this is needed again
* in the future, here is the place to add it */
policy = SESMAN_CFG_SESS_POLICY_U | SESMAN_CFG_SESS_POLICY_B;
}
config_output_policy_string(policy, policy_str, sizeof(policy_str));
LOG(LOG_LEVEL_DEBUG,
"%s: search policy=%s type=%s U=%d B=%d D=(%dx%d) I=%s",
__func__,
policy_str, SCP_SESSION_TYPE_TO_STR(type),
uid, bpp, width, height,
ip_addr);
/* 'Separate' policy never matches */
if (policy & SESMAN_CFG_SESS_POLICY_SEPARATE)
{
LOG(LOG_LEVEL_DEBUG, "%s: No matches possible", __func__);
return NULL;
}
for (i = 0 ; i < g_session_list->count ; ++i)
{
struct session_item *si;
si = (struct session_item *)list_get_item(g_session_list, i);
if (!SESSION_IN_USE(si))
{
continue;
}
LOG(LOG_LEVEL_DEBUG,
"%s: try %p type=%s U=%d B=%d D=(%dx%d) I=%s",
__func__,
si,
SCP_SESSION_TYPE_TO_STR(si->type),
si->uid, si->bpp,
si->start_width, si->start_height,
si->start_ip_addr);
if (si->type != type)
{
LOG(LOG_LEVEL_DEBUG, "%s: Type doesn't match", __func__);
continue;
}
if ((policy & SESMAN_CFG_SESS_POLICY_U) && uid != si->uid)
{
LOG(LOG_LEVEL_DEBUG,
"%s: UID doesn't match for 'U' policy", __func__);
continue;
}
if ((policy & SESMAN_CFG_SESS_POLICY_B) && si->bpp != bpp)
{
LOG(LOG_LEVEL_DEBUG,
"%s: bpp doesn't match for 'B' policy", __func__);
continue;
}
if ((policy & SESMAN_CFG_SESS_POLICY_D) &&
(si->start_width != width ||
si->start_height != height))
{
LOG(LOG_LEVEL_DEBUG,
"%s: Dimensions don't match for 'D' policy", __func__);
continue;
}
if ((policy & SESMAN_CFG_SESS_POLICY_I) &&
g_strcmp(si->start_ip_addr, ip_addr) != 0)
{
LOG(LOG_LEVEL_DEBUG,
"%s: IPs don't match for 'I' policy", __func__);
continue;
}
LOG(LOG_LEVEL_DEBUG,
"%s: Got match, display=%d", __func__, si->display);
return si;
}
LOG(LOG_LEVEL_DEBUG, "%s: No matches found", __func__);
return NULL;
}
/******************************************************************************/
struct scp_session_info *
session_list_get_byuid(const uid_t *uid, unsigned int *cnt, unsigned int flags)
{
int i;
struct scp_session_info *sess;
int count;
int index;
count = 0;
if (uid != NULL)
{
LOG(LOG_LEVEL_DEBUG, "searching for session by UID: %d", (int)*uid);
}
else
{
LOG(LOG_LEVEL_DEBUG, "searching for all sessions");
}
for (i = 0 ; i < g_session_list->count ; ++i)
{
const struct session_item *si;
si = (const struct session_item *)list_get_item(g_session_list, i);
if (SESSION_IN_USE(si) && (uid == NULL || *uid == si->uid))
{
count++;
}
}
if (count == 0)
{
(*cnt) = 0;
return 0;
}
/* malloc() an array of disconnected sessions */
sess = g_new0(struct scp_session_info, count);
if (sess == 0)
{
(*cnt) = 0;
return 0;
}
index = 0;
for (i = 0 ; i < g_session_list->count ; ++i)
{
const struct session_item *si;
si = (const struct session_item *)list_get_item(g_session_list, i);
if (SESSION_IN_USE(si) && (uid == NULL || *uid == si->uid))
{
sess[index].sid = si->sesexec_pid;
sess[index].display = si->display;
sess[index].type = si->type;
sess[index].height = si->start_height;
sess[index].width = si->start_width;
sess[index].bpp = si->bpp;
sess[index].start_time = si->start_time;
sess[index].uid = si->uid;
sess[index].start_ip_addr = g_strdup(si->start_ip_addr);
sess[index].client_ip = g_strdup(si->client_ip);
sess[index].client_name = g_strdup(si->client_name);
sess[index].last_connect_disconnect = si->last_connect_disconnect;
/* Check for string allocation failures */
if (sess[index].start_ip_addr == NULL ||
sess[index].client_ip == NULL ||
sess[index].client_name == NULL)
{
free_session_info_list(sess, *cnt);
(*cnt) = 0;
return 0;
}
index++;
}
}
(*cnt) = count;
return sess;
}
/******************************************************************************/
struct session_item *
session_list_get_byguid(const struct guid *guid)
{
int i;
for (i = 0 ; i < g_session_list->count ; ++i)
{
struct session_item *si;
si = (struct session_item *)list_get_item(g_session_list, i);
if (SESSION_IN_USE(si) && GUID_ARE_EQUAL(guid, &si->guid))
{
return si;
}
}
return NULL;
}
/******************************************************************************/
void
free_session_info_list(struct scp_session_info *sesslist, unsigned int cnt)
{
if (sesslist != NULL && cnt > 0)
{
unsigned int i;
for (i = 0 ; i < cnt ; ++i)
{
g_free(sesslist[i].start_ip_addr);
g_free(sesslist[i].client_ip);
g_free(sesslist[i].client_name);
}
}
g_free(sesslist);
}
/******************************************************************************/
int
session_list_get_wait_objs(tbus robjs[], int *robjs_count)
{
int i;
for (i = 0 ; i < g_session_list->count; ++i)
{
const struct session_item *si;
si = (const struct session_item *)list_get_item(g_session_list, i);
if (SESSION_IN_USE(si))
{
robjs[(*robjs_count)++] = si->sesexec_trans->sck;
}
}
return 0;
}
/******************************************************************************/
int
session_list_check_wait_objs(void)
{
int i = 0;
while (i < g_session_list->count)
{
struct session_item *si;
si = (struct session_item *)list_get_item(g_session_list, i);
if (SESSION_IN_USE(si))
{
if (trans_check_wait_objs(si->sesexec_trans) != 0)
{
LOG(LOG_LEVEL_ERROR, "sesman_check_wait_objs: "
"trans_check_wait_objs failed, removing trans");
si->sesexec_trans->status = TRANS_STATUS_DOWN;
}
}
if (SESSION_IN_USE(si))
{
++i;
}
else
{
free_session(si);
list_remove_item(g_session_list, i);
}
}
return 0;
}
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