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/*
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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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Copyright (C) Jay Sorg 2004
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iso layer
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*/
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#include "xrdp.h"
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/*****************************************************************************/
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struct xrdp_iso* xrdp_iso_create(struct xrdp_mcs* owner)
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{
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struct xrdp_iso* self;
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self = (struct xrdp_iso*)g_malloc(sizeof(struct xrdp_iso), 1);
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self->mcs_layer = owner;
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self->in_s = owner->in_s;
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self->out_s = owner->out_s;
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self->tcp_layer = xrdp_tcp_create(self);
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return self;
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}
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/*****************************************************************************/
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void xrdp_iso_delete(struct xrdp_iso* self)
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{
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if (self == 0)
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return;
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xrdp_tcp_delete(self->tcp_layer);
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g_free(self);
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}
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/*****************************************************************************/
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/* returns error */
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int xrdp_iso_recv_msg(struct xrdp_iso* self, int* code)
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{
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int ver;
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int len;
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*code = 0;
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if (xrdp_tcp_recv(self->tcp_layer, 4) != 0)
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return 1;
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in_uint8(self->in_s, ver);
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if (ver != 3)
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return 1;
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in_uint8s(self->in_s, 1);
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in_uint16_be(self->in_s, len);
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if (xrdp_tcp_recv(self->tcp_layer, len - 4) != 0)
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return 1;
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in_uint8s(self->in_s, 1);
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in_uint8(self->in_s, *code);
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if (*code == ISO_PDU_DT)
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{
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in_uint8s(self->in_s, 1);
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}
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else
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{
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in_uint8s(self->in_s, 5);
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}
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return 0;
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}
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/*****************************************************************************/
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/* returns error */
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int xrdp_iso_recv(struct xrdp_iso* self)
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{
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int code;
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DEBUG((" in xrdp_iso_recv\n\r"));
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if (xrdp_iso_recv_msg(self, &code) != 0)
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return 1;
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if (code != ISO_PDU_DT)
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return 1;
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DEBUG((" out xrdp_iso_recv\n\r"));
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return 0;
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}
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/*****************************************************************************/
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int xrdp_iso_send_msg(struct xrdp_iso* self, int code)
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{
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if (xrdp_tcp_init(self->tcp_layer, 11) != 0)
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return 1;
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out_uint8(self->out_s, 3);
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out_uint8(self->out_s, 0);
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out_uint16_be(self->out_s, 11); /* length */
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out_uint8(self->out_s, 8);
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out_uint8(self->out_s, code);
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out_uint16_le(self->out_s, 0);
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out_uint16_le(self->out_s, 0);
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out_uint8(self->out_s, 0);
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s_mark_end(self->out_s);
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if (xrdp_tcp_send(self->tcp_layer) != 0)
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return 1;
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return 0;
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}
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/*****************************************************************************/
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/* returns error */
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int xrdp_iso_incoming(struct xrdp_iso* self)
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{
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int code;
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DEBUG((" in xrdp_iso_incoming\n\r"));
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if (xrdp_iso_recv_msg(self, &code) != 0)
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return 1;
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if (code != ISO_PDU_CR)
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return 1;
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if (xrdp_iso_send_msg(self, ISO_PDU_CC) != 0)
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return 1;
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DEBUG((" out xrdp_iso_incoming\n\r"));
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return 0;
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}
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/*****************************************************************************/
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/* returns error */
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int xrdp_iso_init(struct xrdp_iso* self, int len)
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{
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xrdp_tcp_init(self->tcp_layer, len + 7);
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s_push_layer(self->out_s, iso_hdr, 7);
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return 0;
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}
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/*****************************************************************************/
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/* returns error */
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int xrdp_iso_send(struct xrdp_iso* self)
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{
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int len;
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DEBUG((" in xrdp_iso_send\n\r"));
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s_pop_layer(self->out_s, iso_hdr);
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len = self->out_s->end - self->out_s->p;
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out_uint8(self->out_s, 3);
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out_uint8(self->out_s, 0);
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out_uint16_be(self->out_s, len);
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out_uint8(self->out_s, 2);
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out_uint8(self->out_s, ISO_PDU_DT);
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out_uint8(self->out_s, 0x80);
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if (xrdp_tcp_send(self->tcp_layer) != 0)
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return 1;
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DEBUG((" out xrdp_iso_send\n\r"));
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return 0;
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}
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