Create pre-session list
This is made from the old sesman_con structure. It describes a connection to sesman which is not yet running a session.
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matt335672
parent
dadb393443
commit
8e291846d5
@ -20,6 +20,8 @@ xrdp_sesman_SOURCES = \
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env.h \
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lock_uds.c \
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lock_uds.h \
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pre_session_list.c \
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pre_session_list.h \
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scp_process.c \
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scp_process.h \
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sesman.c \
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261
sesman/pre_session_list.c
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261
sesman/pre_session_list.c
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@ -0,0 +1,261 @@
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/**
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* xrdp: A Remote Desktop Protocol server.
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*
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* Copyright (C) Jay Sorg 2004-2015
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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*
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* @file pre_session_list.h
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* @brief List of pre-session connections to sesman (definitions)
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*
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* @author Matt Burt
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*/
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#if defined(HAVE_CONFIG_H)
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#include <config_ac.h>
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#endif
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#include "arch.h"
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#include "list.h"
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#include "os_calls.h"
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#include "pre_session_list.h"
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#include "trans.h"
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#define PRE_SESSION_IN_USE(si) \
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( \
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(si) != NULL && \
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( \
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((si)->client_trans != NULL && (si)->client_trans->status == TRANS_STATUS_UP) || \
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((si)->sesexec_trans != NULL && (si)->sesexec_trans->status == TRANS_STATUS_UP) \
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) \
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)
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static struct list *g_pre_session_list = NULL;
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/**
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* Deletes a pre_session_item, freeing resources
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*
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* After this call, the passed-in pointer is invalid and must not be
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* referenced.
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*
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* Any auth_info struct found in the sesman_con is also deallocated.
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*
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* @param sc struct to de-allocate
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*/
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static void
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free_pre_session_item(struct pre_session_item *psi)
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{
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if (psi != NULL)
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{
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trans_delete(psi->client_trans);
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trans_delete(psi->sesexec_trans);
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g_free(psi->username);
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g_free(psi);
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}
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}
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/******************************************************************************/
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int
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pre_session_list_init(unsigned int list_size)
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{
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int rv = 1;
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if (g_pre_session_list == NULL)
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{
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g_pre_session_list = list_create_sized(list_size);
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}
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if (g_pre_session_list == NULL)
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{
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LOG(LOG_LEVEL_ERROR, "Can't allocate pre-session list");
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}
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else
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{
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g_pre_session_list->auto_free = 0;
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rv = 0;
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}
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return rv;
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}
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/******************************************************************************/
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void
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pre_session_list_cleanup(void)
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{
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if (g_pre_session_list != NULL)
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{
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int i;
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for (i = 0 ; i < g_pre_session_list->count ; ++i)
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{
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struct pre_session_item *p;
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p = (struct pre_session_item *)list_get_item(g_pre_session_list, i);
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free_pre_session_item(p);
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}
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list_delete(g_pre_session_list);
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g_pre_session_list = NULL;
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}
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}
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/******************************************************************************/
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unsigned int
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pre_session_list_get_count(void)
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{
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return g_pre_session_list->count;
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}
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/******************************************************************************/
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struct pre_session_item *
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pre_session_list_new(void)
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{
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struct pre_session_item *result = g_new0(struct pre_session_item, 1);
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if (result != NULL)
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{
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g_snprintf(result->peername, sizeof(result->peername), "unknown");
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result->uid = (uid_t) -1;
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if (!list_add_item(g_pre_session_list, (tintptr)result))
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{
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g_free(result);
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result = NULL;
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}
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}
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return result;
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}
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/*****************************************************************************/
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int
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pre_session_list_set_peername(struct pre_session_item *psi, const char *name)
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{
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int rv = 1;
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if (psi != NULL && name != NULL)
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{
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g_snprintf(psi->peername, sizeof(psi->peername), "%s", name);
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rv = 0;
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}
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return rv;
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}
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/******************************************************************************/
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int
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pre_session_list_get_wait_objs(tbus robjs[], int *robjs_count)
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{
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int i = 0;
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while (i < g_pre_session_list->count)
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{
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struct pre_session_item *psi;
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psi = (struct pre_session_item *)list_get_item(g_pre_session_list, i);
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int psi_in_use = 0;
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if (psi != NULL)
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{
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if (psi->client_trans != NULL &&
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psi->client_trans->status == TRANS_STATUS_UP)
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{
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robjs[(*robjs_count)++] = psi->client_trans->sck;
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psi_in_use = 1;
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}
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if (psi->sesexec_trans != NULL &&
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psi->sesexec_trans->status == TRANS_STATUS_UP)
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{
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robjs[(*robjs_count)++] = psi->sesexec_trans->sck;
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psi_in_use = 1;
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}
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}
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if (psi_in_use)
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{
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++i;
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}
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else
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{
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free_pre_session_item(psi);
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list_remove_item(g_pre_session_list, i);
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}
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}
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return 0;
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}
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/******************************************************************************/
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int
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pre_session_list_check_wait_objs(void)
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{
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int i = 0;
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while (i < g_pre_session_list->count)
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{
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struct pre_session_item *psi;
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enum pre_session_dispatcher_action action;
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psi = (struct pre_session_item *)list_get_item(g_pre_session_list, i);
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action = E_PSD_TERMINATE_PRE_SESSION;
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if (PRE_SESSION_IN_USE(psi))
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{
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if (psi->client_trans != NULL &&
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psi->client_trans->status == TRANS_STATUS_UP)
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{
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if (trans_check_wait_objs(psi->client_trans) != 0)
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{
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LOG(LOG_LEVEL_ERROR, "pre_session_list_check_wait_objs: "
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"trans_check_wait_objs(1) failed, removing trans");
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psi->dispatcher_action = E_PSD_TERMINATE_PRE_SESSION;
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}
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}
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if (psi->sesexec_trans != NULL &&
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psi->sesexec_trans->status == TRANS_STATUS_UP)
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{
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if (trans_check_wait_objs(psi->sesexec_trans) != 0)
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{
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LOG(LOG_LEVEL_ERROR, "pre_session_list_check_wait_objs: "
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"trans_check_wait_objs(2) failed, removing trans");
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psi->dispatcher_action = E_PSD_TERMINATE_PRE_SESSION;
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}
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}
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/* Get any action, and reset the requested one */
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action = psi->dispatcher_action;
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psi->dispatcher_action = E_PSD_NONE;
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}
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switch (action)
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{
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case E_PSD_NONE:
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/* On to the next item on the list */
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++i;
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break;
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case E_PSD_REMOVE_CLIENT_TRANS:
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trans_delete(psi->client_trans);
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psi->client_trans = NULL;
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/* On to the next item on the list */
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++i;
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break;
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case E_PSD_TERMINATE_PRE_SESSION:
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free_pre_session_item(psi);
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list_remove_item(g_pre_session_list, i);
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break;
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}
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}
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return 0;
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}
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148
sesman/pre_session_list.h
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148
sesman/pre_session_list.h
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@ -0,0 +1,148 @@
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/**
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* xrdp: A Remote Desktop Protocol server.
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*
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* Copyright (C) Jay Sorg 2004-2013
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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*
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* @file pre_session_list.h
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* @brief List of pre-session connections to sesman (declarations)
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*
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* Items on this list are moved to the session list once they have
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* authenticated and a session is started.
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*
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* @author Matt Burt
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*
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*/
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#ifndef PRE_SESSION_LIST_H
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#define PRE_SESSION_LIST_H
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#include <sys/types.h>
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#include "xrdp_constants.h"
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/**
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* Type describing the login state of a pre-session item
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*/
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enum ps_login_state
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{
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E_PS_LOGIN_NOT_LOGGED_IN = 0,
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E_PS_LOGIN_SYS,
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E_PS_LOGIN_UDS
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};
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/**
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* Action we require the dispatcher to do for us
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*
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* We can't do some things in an SCP or EICP callback, so we have to
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* ask the dispatcher to do them. For example, we can't delete the
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* client_trans as the callback stack won't be expecting this.
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*/
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enum pre_session_dispatcher_action
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{
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E_PSD_NONE = 0,
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E_PSD_REMOVE_CLIENT_TRANS,
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E_PSD_TERMINATE_PRE_SESSION
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};
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/**
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* Type for managing sesman connections from SCP clients (xrdp, etc)
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* and any sesexec processes we've created for them.
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*/
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struct pre_session_item
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{
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struct trans *client_trans; ///< SCP link to sesman client
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struct trans *sesexec_trans; ///< ECP link to sesexec
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pid_t sesexec_pid; ///< PID of sesexec (if sesexec is active)
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char peername[15 + 1]; ///< Name of peer, if known, for logging
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enum ps_login_state login_state; ///< Login state
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/**
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* Any action which a callback requires the dispatcher to
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* do out of scope of the callback */
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enum pre_session_dispatcher_action dispatcher_action;
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uid_t uid; ///< User
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char *username; ///< Username from UID (at time of logon)
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char start_ip_addr[MAX_PEER_ADDRSTRLEN];
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};
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/**
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* Initialise the module
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* @param list_size Number of pre-session items allowed
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* @return 0 for success
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*
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* Errors are logged
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*/
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int
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pre_session_list_init(unsigned int list_size);
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/**
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* Clean up the module on program exit
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*/
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void
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pre_session_list_cleanup(void);
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/**
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* Returns the number of items on the pre-session list
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* @return Item count
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*/
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unsigned int
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pre_session_list_get_count(void);
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/**
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* Allocates a new pre-session item on the list
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*
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* @return pointer to new pre-session object or NULL for no memory
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*
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* After allocating the session, you must initialise the sesexec_trans field
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* with a valid transport.
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*
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* The session is removed by pre_session_list_get_wait_objs() or
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* pre_session_check_wait_objs() when the client
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* transport goes down (or wasn't allocated in the first place).
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*/
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struct pre_session_item *
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pre_session_list_new(void);
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/**
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* Set the peername of a pre-session
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*
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* @param psi pre-session-item
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* @param name Name to set
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* @result 0 for success
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*/
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int
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pre_session_list_set_peername(struct pre_session_item *psi, const char *name);
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/**
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* @brief Get the wait objs for the pre-session list module
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* @param @robjs Objects array to update
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* @param robjs_count Elements in robjs (by reference)
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* @return 0 for success
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*/
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int
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pre_session_list_get_wait_objs(tbus robjs[], int *robjs_count);
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/**
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* @brief Check the wait objs for the pre-session list module
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* @return 0 for success
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*/
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int
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pre_session_list_check_wait_objs(void);
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#endif // PRE_SESSION_LIST_H
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