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321 lines
8.7 KiB
321 lines
8.7 KiB
/**
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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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* main rdp process
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*/
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#include "xrdp.h"
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static int g_session_id = 0;
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/*****************************************************************************/
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/* always called from xrdp_listen thread */
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struct xrdp_process *APP_CC
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xrdp_process_create(struct xrdp_listen *owner, tbus done_event)
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{
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struct xrdp_process *self;
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char event_name[256];
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int pid;
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self = (struct xrdp_process *)g_malloc(sizeof(struct xrdp_process), 1);
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self->lis_layer = owner;
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self->done_event = done_event;
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g_session_id++;
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self->session_id = g_session_id;
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pid = g_getpid();
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g_snprintf(event_name, 255, "xrdp_%8.8x_process_self_term_event_%8.8x",
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pid, self->session_id);
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self->self_term_event = g_create_wait_obj(event_name);
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return self;
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}
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/*****************************************************************************/
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void APP_CC
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xrdp_process_delete(struct xrdp_process *self)
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{
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if (self == 0)
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{
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return;
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}
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g_delete_wait_obj(self->self_term_event);
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libxrdp_exit(self->session);
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xrdp_wm_delete(self->wm);
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trans_delete(self->server_trans);
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g_free(self);
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}
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/*****************************************************************************/
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static int APP_CC
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xrdp_process_loop(struct xrdp_process *self, struct stream *s)
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{
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int rv;
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rv = 0;
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if (self->session != 0)
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{
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rv = libxrdp_process_data(self->session, s);
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}
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if ((self->wm == 0) && (self->session->up_and_running) && (rv == 0))
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{
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DEBUG(("calling xrdp_wm_init and creating wm"));
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self->wm = xrdp_wm_create(self, self->session->client_info);
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/* at this point the wm(window manager) is create and wm::login_mode is
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zero and login_mode_event is set so xrdp_wm_init should be called by
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xrdp_wm_check_wait_objs */
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}
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return rv;
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}
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/*****************************************************************************/
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/* returns boolean */
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/* this is so libxrdp.so can known when to quit looping */
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static int DEFAULT_CC
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xrdp_is_term(void)
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{
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return g_is_term();
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}
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/*****************************************************************************/
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static int APP_CC
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xrdp_process_mod_end(struct xrdp_process *self)
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{
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if (self->wm != 0)
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{
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if (self->wm->mm != 0)
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{
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if (self->wm->mm->mod != 0)
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{
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if (self->wm->mm->mod->mod_end != 0)
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{
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return self->wm->mm->mod->mod_end(self->wm->mm->mod);
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}
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}
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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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static int APP_CC
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xrdp_process_get_pdu_bytes(const char *aheader)
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{
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int rv;
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const tui8 *header;
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rv = -1;
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header = (const tui8 *) aheader;
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if (header[0] == 0x03)
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{
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/* TPKT */
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rv = (header[2] << 8) | header[3];
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}
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else if (header[0] == 0x30)
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{
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/* TSRequest (NLA) */
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if (header[1] & 0x80)
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{
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if ((header[1] & ~(0x80)) == 1)
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{
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rv = header[2];
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rv += 3;
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}
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else if ((header[1] & ~(0x80)) == 2)
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{
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rv = (header[2] << 8) | header[3];
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rv += 4;
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}
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else
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{
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g_writeln("xrdp_process_get_packet_bytes: error TSRequest!");
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return -1;
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}
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}
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else
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{
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rv = header[1];
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rv += 2;
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}
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}
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else
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{
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/* Fast-Path */
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if (header[1] & 0x80)
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{
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rv = ((header[1] & 0x7F) << 8) | header[2];
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}
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else
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{
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rv = header[1];
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}
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}
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return rv;
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}
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/*****************************************************************************/
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static int DEFAULT_CC
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xrdp_process_data_in(struct trans *self)
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{
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struct xrdp_process *pro;
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struct stream *s;
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int len;
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DEBUG(("xrdp_process_data_in"));
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pro = (struct xrdp_process *)(self->callback_data);
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s = pro->server_trans->in_s;
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switch (pro->server_trans->extra_flags)
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{
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case 0:
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/* early in connection sequence, we're in this mode */
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if (xrdp_process_loop(pro, 0) != 0)
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{
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g_writeln("xrdp_process_data_in: "
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"xrdp_process_loop failed");
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return 1;
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}
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if (pro->session->up_and_running)
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{
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pro->server_trans->extra_flags = 1;
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pro->server_trans->header_size = 4;
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}
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break;
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case 1:
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/* we have enough now to get the PDU bytes */
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len = xrdp_process_get_pdu_bytes(s->p);
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if (len == -1)
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{
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g_writeln("xrdp_process_data_in: "
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"xrdp_process_get_packet_bytes failed");
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return 1;
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}
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pro->server_trans->header_size = len;
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pro->server_trans->extra_flags = 2;
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break;
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case 2:
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/* the whole PDU is read in now process */
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s->p = s->data;
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if (xrdp_process_loop(pro, s) != 0)
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{
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g_writeln("xrdp_process_data_in: "
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"xrdp_process_loop failed");
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return 1;
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}
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init_stream(s, 0);
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pro->server_trans->header_size = 4;
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pro->server_trans->extra_flags = 1;
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break;
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}
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return 0;
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}
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/*****************************************************************************/
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int APP_CC
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xrdp_process_main_loop(struct xrdp_process *self)
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{
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int robjs_count;
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int wobjs_count;
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int cont;
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int timeout = 0;
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tbus robjs[32];
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tbus wobjs[32];
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tbus term_obj;
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DEBUG(("xrdp_process_main_loop"));
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self->status = 1;
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self->server_trans->extra_flags = 0;
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self->server_trans->header_size = 0;
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self->server_trans->no_stream_init_on_data_in = 1;
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self->server_trans->trans_data_in = xrdp_process_data_in;
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self->server_trans->callback_data = self;
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init_stream(self->server_trans->in_s, 8192 * 4);
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self->session = libxrdp_init((tbus)self, self->server_trans);
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/* this callback function is in xrdp_wm.c */
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self->session->callback = callback;
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/* this function is just above */
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self->session->is_term = xrdp_is_term;
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if (libxrdp_process_incomming(self->session) == 0)
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{
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term_obj = g_get_term_event();
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cont = 1;
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while (cont)
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{
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/* build the wait obj list */
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timeout = -1;
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robjs_count = 0;
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wobjs_count = 0;
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robjs[robjs_count++] = term_obj;
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robjs[robjs_count++] = self->self_term_event;
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xrdp_wm_get_wait_objs(self->wm, robjs, &robjs_count,
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wobjs, &wobjs_count, &timeout);
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trans_get_wait_objs(self->server_trans, robjs, &robjs_count);
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/* wait */
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if (g_obj_wait(robjs, robjs_count, wobjs, wobjs_count, timeout) != 0)
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{
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/* error, should not get here */
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g_sleep(100);
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}
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if (g_is_wait_obj_set(term_obj)) /* term */
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{
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break;
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}
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if (g_is_wait_obj_set(self->self_term_event))
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{
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break;
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}
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if (xrdp_wm_check_wait_objs(self->wm) != 0)
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{
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break;
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}
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if (trans_check_wait_objs(self->server_trans) != 0)
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{
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break;
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}
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}
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/* send disconnect message if possible */
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libxrdp_disconnect(self->session);
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}
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else
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{
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g_writeln("xrdp_process_main_loop: libxrdp_process_incomming failed");
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/* this will try to send a disconnect,
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maybe should check that connection got far enough */
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libxrdp_disconnect(self->session);
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}
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/* Run end in module */
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xrdp_process_mod_end(self);
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libxrdp_exit(self->session);
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self->session = 0;
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self->status = -1;
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g_set_wait_obj(self->done_event);
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return 0;
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}
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