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600 lines
14 KiB
600 lines
14 KiB
/*
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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xrdp: A Remote Desktop Protocol server.
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Copyright (C) Jay Sorg 2005-2007
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*/
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/**
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*
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* @file libscp_v1s.c
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* @brief libscp version 1 server api code
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* @author Simone Fedele
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*
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*/
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#ifndef LIBSCP_V1S_C
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#define LIBSCP_V1S_C
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#include "libscp_v1s.h"
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/* server API */
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enum SCP_SERVER_STATES_E scp_v1s_accept(struct SCP_CONNECTION* c, struct SCP_SESSION** s, int skipVchk)
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{
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struct SCP_SESSION* session;
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uint32_t version;
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uint32_t size;
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uint16_t cmdset;
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uint16_t cmd;
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unsigned char sz;
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if (!skipVchk)
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{
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if (0==tcp_force_recv(c->in_sck, c->in_s->data, 8))
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{
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in_uint32_be(c->in_s, version);
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if (version != 1)
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{
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return SCP_SERVER_STATE_VERSION_ERR;
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}
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}
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else
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{
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return SCP_SERVER_STATE_NETWORK_ERR;
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}
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}
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else
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{
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version=1;
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}
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in_uint32_be(c->in_s, size);
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if (size<12)
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{
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return SCP_SERVER_STATE_SIZE_ERR;
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}
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init_stream(c->in_s, c->in_s->size);
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if (0!=tcp_force_recv(c->in_sck, c->in_s->data, (size-8)))
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{
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return SCP_SERVER_STATE_NETWORK_ERR;
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}
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/* reading command set */
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in_uint16_be(c->in_s, cmdset);
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/* if we are starting a management session */
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if (cmdset==SCP_COMMAND_SET_MANAGE)
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{
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return SCP_SERVER_STATE_START_MANAGE;
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}
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/* if we started with resource sharing... */
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if (cmdset==SCP_COMMAND_SET_RSR)
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{
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return SCP_SERVER_STATE_SEQUENCE_ERR;
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}
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/* reading command */
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in_uint16_be(c->in_s, cmd);
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if (cmd != 1)
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{
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return SCP_SERVER_STATE_SEQUENCE_ERR;
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}
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session = g_malloc(sizeof(struct SCP_SESSION),1);
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if (0 == session)
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{
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return SCP_SERVER_STATE_INTERNAL_ERR;
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}
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session->version=1;
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in_uint8(c->in_s, session->type);
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if ((session->type != SCP_SESSION_TYPE_XVNC) && (session->type != SCP_SESSION_TYPE_XRDP))
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{
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g_free(session);
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return SCP_SERVER_STATE_SESSION_TYPE_ERR;
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}
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in_uint16_be(c->in_s,session->height);
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in_uint16_be(c->in_s, session->width);
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in_uint8(c->in_s, session->bpp);
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in_uint8(c->in_s, session->rsr);
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in_uint8a(c->in_s, session->locale, 17);
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session->locale[17]='\0';
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in_uint8(c->in_s, session->addr_type);
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if (session->addr_type==SCP_ADDRESS_TYPE_IPV4)
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{
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in_uint32_be(c->in_s, session->ipv4addr);
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}
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else if (session->addr_type==SCP_ADDRESS_TYPE_IPV6)
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{
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#warning how to handle ipv6 addresses?
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}
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/* reading hostname */
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in_uint8(c->in_s, sz);
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session->hostname=g_malloc(sz+1,1);
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if (0==session->hostname)
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{
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g_free(session);
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return SCP_SERVER_STATE_INTERNAL_ERR;
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}
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session->hostname[sz]='\0';
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in_uint8a(c->in_s, session->hostname, sz);
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/* reading username */
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in_uint8(c->in_s, sz);
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session->username=g_malloc(sz+1,1);
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if (0==session->username)
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{
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g_free(session->hostname);
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g_free(session);
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return SCP_SERVER_STATE_INTERNAL_ERR;
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}
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session->username[sz]='\0';
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in_uint8a(c->in_s, session->username, sz);
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/* reading password */
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in_uint8(c->in_s, sz);
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session->password=g_malloc(sz+1,1);
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if (0==session->password)
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{
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g_free(session->username);
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g_free(session->hostname);
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g_free(session);
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return SCP_SERVER_STATE_INTERNAL_ERR;
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}
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session->password[sz]='\0';
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in_uint8a(c->in_s, session->password, sz);
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/* returning the struct */
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(*s)=session;
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return SCP_SERVER_STATE_OK;
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}
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enum SCP_SERVER_STATES_E
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scp_v1s_deny_connection(struct SCP_CONNECTION* c, char* reason)
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{
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int rlen;
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init_stream(c->out_s,c->out_s->size);
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/* forcing message not to exceed 64k */
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rlen = g_strlen(reason);
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if (rlen > 65535)
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{
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rlen = 65535;
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}
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out_uint32_be(c->out_s, 1);
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/* packet size: 4 + 4 + 2 + 2 + 2 + strlen(reason)*/
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/* version + size + cmdset + cmd + msglen + msg */
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out_uint32_be(c->out_s, rlen+14);
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out_uint16_be(c->out_s, SCP_COMMAND_SET_DEFAULT);
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out_uint16_be(c->out_s, 2);
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out_uint16_be(c->out_s, rlen)
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out_uint8p(c->out_s, reason, rlen);
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if (0!=tcp_force_send(c->in_sck, c->out_s->data, rlen+14))
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{
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return SCP_SERVER_STATE_NETWORK_ERR;
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}
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return SCP_SERVER_STATE_END;
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}
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enum SCP_SERVER_STATES_E
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scp_v1s_request_password(struct SCP_CONNECTION* c, struct SCP_SESSION* s, char* reason)
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{
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unsigned char sz;
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char *ubuf;
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char *pbuf;
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uint32_t version;
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uint32_t size;
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uint16_t cmdset;
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uint16_t cmd;
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int rlen;
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init_stream(c->in_s, c->in_s->size);
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init_stream(c->out_s, c->out_s->size);
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/* forcing message not to exceed 64k */
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rlen = g_strlen(reason);
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if (rlen > 65535)
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{
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rlen = 65535;
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}
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/* send password request */
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version=1;
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size=12;
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cmdset=0;
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cmd=3;
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out_uint32_be(c->out_s, version); /* version */
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out_uint32_be(c->out_s, 14+rlen); /* size */
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out_uint16_be(c->out_s, SCP_COMMAND_SET_DEFAULT); /* cmdset */
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out_uint16_be(c->out_s, cmd); /* cmd */
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out_uint16_be(c->out_s, rlen);
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out_uint8p(c->out_s, reason, rlen);
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if (0!=tcp_force_send(c->in_sck, c->out_s->data, 14+rlen))
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{
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return SCP_SERVER_STATE_NETWORK_ERR;
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}
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/* receive password & username */
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if (0!=tcp_force_recv(c->in_sck, c->in_s->data, 8))
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{
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return SCP_SERVER_STATE_NETWORK_ERR;
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}
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in_uint32_be(c->in_s, version);
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if (version!=1)
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{
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return SCP_SERVER_STATE_VERSION_ERR;
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}
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in_uint32_be(c->in_s, size);
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if (size<12)
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{
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return SCP_SERVER_STATE_SIZE_ERR;
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}
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init_stream(c->in_s, c->in_s->size);
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if (0!=tcp_force_recv(c->in_sck, c->in_s->data, (size-8)))
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{
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return SCP_SERVER_STATE_NETWORK_ERR;
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}
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in_uint16_be(c->in_s, cmdset);
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if (cmdset != SCP_COMMAND_SET_DEFAULT)
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{
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return SCP_SERVER_STATE_SEQUENCE_ERR;
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}
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in_uint16_be(c->in_s, cmd);
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if (cmd != 4)
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{
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return SCP_SERVER_STATE_SEQUENCE_ERR;
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}
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/* reading username */
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in_uint8(c->in_s, sz);
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ubuf=g_malloc(sz+1,1);
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if (0==ubuf)
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{
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return SCP_SERVER_STATE_INTERNAL_ERR;
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}
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ubuf[sz]='\0';
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in_uint8a(c->in_s, ubuf, sz);
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/* reading password */
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in_uint8(c->in_s, sz);
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pbuf=g_malloc(sz+1,1);
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if (0==pbuf)
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{
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g_free(ubuf);
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return SCP_SERVER_STATE_INTERNAL_ERR;
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}
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pbuf[sz]='\0';
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in_uint8a(c->in_s, pbuf, sz);
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/* replacing username and password */
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g_free(s->username);
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g_free(s->password);
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s->username=ubuf;
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s->password=pbuf;
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return SCP_SERVER_STATE_OK;
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}
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/* 020 */
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enum SCP_SERVER_STATES_E
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scp_v1s_request_pwd_change(struct SCP_CONNECTION* c, char* reason, char* npw)
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{
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return SCP_SERVER_STATE_INTERNAL_ERR;
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}
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/* 023 */
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enum SCP_SERVER_STATES_E
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scp_v1s_pwd_change_error(struct SCP_CONNECTION* c, char* error, int retry, char* npw)
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{
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return SCP_SERVER_STATE_INTERNAL_ERR;
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}
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/* 030 */
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enum SCP_SERVER_STATES_E
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scp_v1s_connect_new_session(struct SCP_CONNECTION* c, SCP_DISPLAY d)
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{
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/* send password request */
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uint32_t version=1;
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uint32_t size=14;
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uint16_t cmd=30;
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init_stream(c->out_s, c->out_s->size);
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out_uint32_be(c->out_s, version); /* version */
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out_uint32_be(c->out_s, size); /* size */
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out_uint16_be(c->out_s, SCP_COMMAND_SET_DEFAULT); /* cmdset */
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out_uint16_be(c->out_s, cmd); /* cmd */
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out_uint16_be(c->out_s, d); /* display */
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if (0!=tcp_force_send(c->in_sck, c->out_s->data, 14))
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{
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return SCP_SERVER_STATE_NETWORK_ERR;
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}
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return SCP_SERVER_STATE_OK;
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}
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/* 032 */
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enum SCP_SERVER_STATES_E
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scp_v1s_connection_error(struct SCP_CONNECTION* c, char* error)
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{
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return SCP_SERVER_STATE_INTERNAL_ERR;
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return SCP_SERVER_STATE_END;
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}
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/* 040 */
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enum SCP_SERVER_STATES_E
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scp_v1s_list_sessions(struct SCP_CONNECTION* c, int sescnt, struct SCP_DISCONNECTED_SESSION* ds, SCP_SID* sid)
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{
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uint32_t version=1;
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uint32_t size=12;
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uint16_t cmd=40;
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int pktcnt;
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int idx;
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int sidx;
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int pidx;
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struct SCP_DISCONNECTED_SESSION* cds;
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/* first we send a notice that we have some disconnected sessions */
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init_stream(c->out_s, c->out_s->size);
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out_uint32_be(c->out_s, version); /* version */
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out_uint32_be(c->out_s, size); /* size */
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out_uint16_be(c->out_s, SCP_COMMAND_SET_DEFAULT); /* cmdset */
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out_uint16_be(c->out_s, cmd); /* cmd */
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if (0!=tcp_force_send(c->in_sck, c->out_s->data, size))
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{
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return SCP_SERVER_STATE_NETWORK_ERR;
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}
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/* then we wait for client ack */
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#warning maybe this message could say if the session should be resized on
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#warning server side or client side
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init_stream(c->in_s, c->in_s->size);
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if (0!=tcp_force_recv(c->in_sck, c->in_s->data, 8))
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{
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return SCP_SERVER_STATE_NETWORK_ERR;
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}
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in_uint32_be(c->in_s, version);
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if (version!=1)
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{
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return SCP_SERVER_STATE_VERSION_ERR;
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}
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in_uint32_be(c->in_s, size);
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if (size<12)
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{
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return SCP_SERVER_STATE_SIZE_ERR;
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}
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init_stream(c->in_s, c->in_s->size);
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if (0!=tcp_force_recv(c->in_sck, c->in_s->data, (size-8)))
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{
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return SCP_SERVER_STATE_NETWORK_ERR;
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}
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in_uint16_be(c->in_s, cmd);
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if (cmd != SCP_COMMAND_SET_DEFAULT)
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{
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return SCP_SERVER_STATE_SEQUENCE_ERR;
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}
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in_uint16_be(c->in_s, cmd);
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if (cmd != 41)
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{
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return SCP_SERVER_STATE_SEQUENCE_ERR;
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}
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/* calculating the number of packets to send */
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pktcnt=sescnt/SCP_SERVER_MAX_LIST_SIZE;
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if ((sescnt%SCP_SERVER_MAX_LIST_SIZE)!=0)
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{
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pktcnt++;
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}
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for (idx=0; idx<pktcnt; idx++)
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{
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/* ok, we send session session list */
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init_stream(c->out_s, c->out_s->size);
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/* size: ver+size+cmdset+cmd+sescnt+continue+count */
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size=4+4+2+2+4+1+1;
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/* header */
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cmd=42;
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s_push_layer(c->out_s, channel_hdr, 8);
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out_uint16_be(c->out_s, SCP_COMMAND_SET_DEFAULT);
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out_uint16_be(c->out_s, cmd);
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/* session count */
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out_uint32_be(c->out_s, sescnt);
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/* setting the continue flag */
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if ((idx+1)*SCP_SERVER_MAX_LIST_SIZE >= sescnt)
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{
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out_uint8(c->out_s, 0);
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/* setting session count for this packet */
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pidx=sescnt-(idx*SCP_SERVER_MAX_LIST_SIZE);
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out_uint8(c->out_s, pidx);
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}
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else
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{
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out_uint8(c->out_s, 1);
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/* setting session count for this packet */
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pidx=SCP_SERVER_MAX_LIST_SIZE;
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out_uint8(c->out_s, pidx);
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}
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/* adding session descriptors */
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for (sidx=0; sidx<pidx; sidx++)
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{
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/* shortcut to the current session to send */
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cds=ds+((idx)*SCP_SERVER_MAX_LIST_SIZE)+sidx;
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/* session data */
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out_uint32_be(c->out_s, cds->SID); /* session id */
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out_uint8(c->out_s, cds->type);
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out_uint16_be(c->out_s, cds->height);
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out_uint16_be(c->out_s, cds->width);
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out_uint8(c->out_s, cds->bpp);
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out_uint8(c->out_s, cds->idle_days);
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out_uint8(c->out_s, cds->idle_hours);
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out_uint8(c->out_s, cds->idle_minutes);
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size = size + 13;
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}
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s_pop_layer(c->out_s, channel_hdr);
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out_uint32_be(c->out_s, version);
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out_uint32_be(c->out_s, size);
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if (0!=tcp_force_send(c->in_sck, c->out_s->data, size))
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{
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return SCP_SERVER_STATE_NETWORK_ERR;
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}
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}
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/* we get the response */
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init_stream(c->in_s, c->in_s->size);
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if (0!=tcp_force_recv(c->in_sck, c->in_s->data, (8)))
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{
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return SCP_SERVER_STATE_NETWORK_ERR;
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}
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in_uint32_be(c->in_s, version);
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if (version!=1)
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{
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return SCP_SERVER_STATE_VERSION_ERR;
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}
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in_uint32_be(c->in_s, size);
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if (size<12)
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{
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return SCP_SERVER_STATE_SIZE_ERR;
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}
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/* rest of the packet */
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init_stream(c->in_s, c->in_s->size);
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if (0!=tcp_force_recv(c->in_sck, c->in_s->data, (size-8)))
|
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{
|
|
return SCP_SERVER_STATE_NETWORK_ERR;
|
|
}
|
|
|
|
in_uint16_be(c->in_s, cmd);
|
|
if (cmd != SCP_COMMAND_SET_DEFAULT)
|
|
{
|
|
return SCP_SERVER_STATE_SEQUENCE_ERR;
|
|
}
|
|
|
|
in_uint16_be(c->in_s, cmd);
|
|
if (cmd == 43)
|
|
{
|
|
/* select session */
|
|
in_uint32_be(c->in_s, (*sid));
|
|
|
|
/* checking sid value */
|
|
for (idx=0; idx<sescnt; idx++)
|
|
{
|
|
/* the sid is valid */
|
|
if (ds[idx].SID==(*sid))
|
|
{
|
|
/* ok, session selected */
|
|
return SCP_SERVER_STATE_OK;
|
|
}
|
|
}
|
|
|
|
/* if we got here, the requested sid wasn't one from the list we sent */
|
|
/* we should kill the connection */
|
|
return SCP_CLIENT_STATE_INTERNAL_ERR;
|
|
}
|
|
else if (cmd == 44)
|
|
{
|
|
/* cancel connection */
|
|
return SCP_SERVER_STATE_SELECTION_CANCEL;
|
|
}
|
|
// else if (cmd == 45)
|
|
// {
|
|
// /* force new connection */
|
|
// return SCP_SERVER_STATE_FORCE_NEW;
|
|
// }
|
|
else
|
|
{
|
|
/* wrong response */
|
|
return SCP_SERVER_STATE_SEQUENCE_ERR;
|
|
}
|
|
|
|
return SCP_SERVER_STATE_OK;
|
|
}
|
|
|
|
/* 046 was: 031 struct SCP_DISCONNECTED_SESSION* ds, */
|
|
enum SCP_SERVER_STATES_E
|
|
scp_v1s_reconnect_session(struct SCP_CONNECTION* c, SCP_DISPLAY d)
|
|
{
|
|
uint32_t version = 1;
|
|
uint32_t size = 14;
|
|
uint16_t cmd = 46;
|
|
|
|
/* ok, we send session data and display */
|
|
init_stream(c->out_s, c->out_s->size);
|
|
|
|
/* header */
|
|
out_uint32_be(c->out_s, version);
|
|
out_uint32_be(c->out_s, size);
|
|
out_uint16_be(c->out_s, SCP_COMMAND_SET_DEFAULT);
|
|
out_uint16_be(c->out_s, cmd);
|
|
|
|
/* session data */
|
|
out_uint16_be(c->out_s, d); /* session display */
|
|
/*out_uint8(c->out_s, ds->type);
|
|
out_uint16_be(c->out_s, ds->height);
|
|
out_uint16_be(c->out_s, ds->width);
|
|
out_uint8(c->out_s, ds->bpp);
|
|
out_uint8(c->out_s, ds->idle_days);
|
|
out_uint8(c->out_s, ds->idle_hours);
|
|
out_uint8(c->out_s, ds->idle_minutes);*/
|
|
/* these last three are not really needed... */
|
|
|
|
if (0!=tcp_force_send(c->in_sck, c->out_s->data, size))
|
|
{
|
|
return SCP_SERVER_STATE_NETWORK_ERR;
|
|
}
|
|
|
|
return SCP_SERVER_STATE_OK;
|
|
}
|
|
|
|
#endif
|