355 lines
9.6 KiB
C
355 lines
9.6 KiB
C
/**
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* xrdp: A Remote Desktop Protocol server.
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*
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* Copyright (C) Jay Sorg 2004-2012
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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 libscp_v1s_mng.c
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* @brief libscp version 1 server api code - session management
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* @author Simone Fedele
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*
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*/
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#ifndef LIBSCP_V1S_MNG_C
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#define LIBSCP_V1S_MNG_C
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#include "libscp_v1s_mng.h"
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//extern struct log_config* s_log;
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static enum SCP_SERVER_STATES_E
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_scp_v1s_mng_check_response(struct SCP_CONNECTION *c, struct SCP_SESSION *s);
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/* server API */
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enum SCP_SERVER_STATES_E
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scp_v1s_mng_accept(struct SCP_CONNECTION *c, struct SCP_SESSION **s)
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{
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struct SCP_SESSION *session;
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tui32 ipaddr;
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tui16 cmd;
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tui8 sz;
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char buf[257];
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/* reading command */
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in_uint16_be(c->in_s, cmd);
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if (cmd != 1) /* manager login */
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{
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return SCP_SERVER_STATE_SEQUENCE_ERR;
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}
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session = scp_session_create();
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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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scp_session_set_version(session, 1);
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scp_session_set_type(session, SCP_SESSION_TYPE_MANAGE);
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/* reading username */
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in_uint8(c->in_s, sz);
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buf[sz] = '\0';
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in_uint8a(c->in_s, buf, sz);
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if (0 != scp_session_set_username(session, buf))
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{
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scp_session_destroy(session);
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return SCP_SERVER_STATE_INTERNAL_ERR;
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}
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/* reading password */
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in_uint8(c->in_s, sz);
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buf[sz] = '\0';
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in_uint8a(c->in_s, buf, sz);
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if (0 != scp_session_set_password(session, buf))
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{
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scp_session_destroy(session);
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return SCP_SERVER_STATE_INTERNAL_ERR;
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}
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/* reading remote address */
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in_uint8(c->in_s, sz);
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if (sz == SCP_ADDRESS_TYPE_IPV4)
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{
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in_uint32_be(c->in_s, ipaddr);
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scp_session_set_addr(session, SCP_ADDRESS_TYPE_IPV4_BIN, &ipaddr);
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}
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else if (sz == SCP_ADDRESS_TYPE_IPV6)
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{
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in_uint8a(c->in_s, buf, 16);
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scp_session_set_addr(session, SCP_ADDRESS_TYPE_IPV6_BIN, buf);
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}
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/* reading hostname */
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in_uint8(c->in_s, sz);
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buf[sz] = '\0';
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in_uint8a(c->in_s, buf, sz);
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if (0 != scp_session_set_hostname(session, buf))
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{
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scp_session_destroy(session);
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return SCP_SERVER_STATE_INTERNAL_ERR;
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}
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/* returning the struct */
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(*s) = session;
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return SCP_SERVER_STATE_START_MANAGE;
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}
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/* 002 */
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enum SCP_SERVER_STATES_E
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scp_v1s_mng_allow_connection(struct SCP_CONNECTION *c, struct SCP_SESSION *s)
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{
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init_stream(c->out_s, c->out_s->size);
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out_uint32_be(c->out_s, 1);
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/* packet size: 4 + 4 + 2 + 2 */
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/* version + size + cmdset + cmd */
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out_uint32_be(c->out_s, 12);
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out_uint16_be(c->out_s, SCP_COMMAND_SET_MANAGE);
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out_uint16_be(c->out_s, SCP_CMD_MNG_LOGIN_ALLOW);
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if (0 != scp_tcp_force_send(c->in_sck, c->out_s->data, 12))
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{
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return SCP_SERVER_STATE_NETWORK_ERR;
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}
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return _scp_v1s_mng_check_response(c, s);
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}
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/* 003 */
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enum SCP_SERVER_STATES_E
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scp_v1s_mng_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_MANAGE);
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out_uint16_be(c->out_s, SCP_CMD_MNG_LOGIN_DENY);
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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 != scp_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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/* 006 */
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enum SCP_SERVER_STATES_E
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scp_v1s_mng_list_sessions(struct SCP_CONNECTION *c, struct SCP_SESSION *s,
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int sescnt, struct SCP_DISCONNECTED_SESSION *ds)
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{
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tui32 version = 1;
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tui32 size = 12;
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tui16 cmd = SCP_CMD_MNG_LIST;
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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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/* 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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s_push_layer(c->out_s, channel_hdr, 8);
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out_uint16_be(c->out_s, SCP_COMMAND_SET_MANAGE);
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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 += 13;
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out_uint16_be(c->out_s, cds->conn_year);
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out_uint8(c->out_s, cds->conn_month);
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out_uint8(c->out_s, cds->conn_day);
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out_uint8(c->out_s, cds->conn_hour);
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out_uint8(c->out_s, cds->conn_minute);
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out_uint8(c->out_s, cds->addr_type);
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size += 7;
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if (cds->addr_type == SCP_ADDRESS_TYPE_IPV4)
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{
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in_uint32_be(c->out_s, cds->ipv4addr);
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size += 4;
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}
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else if (cds->addr_type == SCP_ADDRESS_TYPE_IPV6)
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{
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in_uint8a(c->out_s, cds->ipv6addr, 16);
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size += 16;
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}
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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 != scp_tcp_force_send(c->in_sck, c->out_s->data, size))
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{
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log_message(LOG_LEVEL_WARNING, "[v1s_mng:%d] connection aborted: network error", __LINE__);
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return SCP_SERVER_STATE_NETWORK_ERR;
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}
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}
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return _scp_v1s_mng_check_response(c, s);
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}
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static enum SCP_SERVER_STATES_E
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_scp_v1s_mng_check_response(struct SCP_CONNECTION *c, struct SCP_SESSION *s)
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{
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tui32 version;
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tui32 size;
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tui16 cmd;
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// tui8 dim;
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// char buf[257];
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init_stream(c->in_s, c->in_s->size);
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if (0 != scp_tcp_force_recv(c->in_sck, c->in_s->data, 8))
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{
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log_message(LOG_LEVEL_WARNING, "[v1s_mng:%d] connection aborted: network error", __LINE__);
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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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log_message(LOG_LEVEL_WARNING, "[v1s_mng:%d] connection aborted: version error", __LINE__);
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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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init_stream(c->in_s, c->in_s->size);
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/* read the rest of the packet */
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if (0 != scp_tcp_force_recv(c->in_sck, c->in_s->data, size - 8))
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{
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log_message(LOG_LEVEL_WARNING, "[v1s_mng:%d] connection aborted: network error", __LINE__);
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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_MANAGE)
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{
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log_message(LOG_LEVEL_WARNING, "[v1s_mng:%d] connection aborted: sequence error", __LINE__);
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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 == SCP_CMD_MNG_LIST_REQ) /* request session list */
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{
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log_message(LOG_LEVEL_INFO, "[v1s_mng:%d] request session list", __LINE__);
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return SCP_SERVER_STATE_MNG_LISTREQ;
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}
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else if (cmd == SCP_CMD_MNG_ACTION) /* execute an action */
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{
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/*in_uint8(c->in_s, dim);
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buf[dim]='\0';
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in_uint8a(c->in_s, buf, dim);
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scp_session_set_errstr(s, buf);*/
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log_message(LOG_LEVEL_INFO, "[v1s_mng:%d] action request", __LINE__);
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return SCP_SERVER_STATE_MNG_ACTION;
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}
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/* else if (cmd == 20) / * password change * /
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{
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in_uint16_be(c->in_s, s->display);
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return SCP_SERVER_STATE_OK;
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}
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else if (cmd == 40) / * session list * /
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{
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return SCP_SERVER_STATE_SESSION_LIST;
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}*/
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log_message(LOG_LEVEL_WARNING, "[v1s_mng:%d] connection aborted: sequence error", __LINE__);
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return SCP_SERVER_STATE_SEQUENCE_ERR;
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}
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#endif
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