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149 lines
3.5 KiB
149 lines
3.5 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 2004-2005
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tcp layer
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*/
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#include "xrdp.h"
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/*****************************************************************************/
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struct xrdp_tcp* xrdp_tcp_create(struct xrdp_iso* owner, int sck)
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{
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struct xrdp_tcp* self;
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self = (struct xrdp_tcp*)g_malloc(sizeof(struct xrdp_tcp), 1);
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self->iso_layer = owner;
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self->sck = sck;
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return self;
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}
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/*****************************************************************************/
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void xrdp_tcp_delete(struct xrdp_tcp* self)
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{
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g_free(self);
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}
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/*****************************************************************************/
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/* get out stream ready for data */
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/* returns error */
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int xrdp_tcp_init(struct xrdp_tcp* self, struct stream* s)
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{
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init_stream(s, 8192);
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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_tcp_recv(struct xrdp_tcp* self, struct stream* s, int len)
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{
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int rcvd;
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if (self->sck_closed)
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{
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DEBUG((" in xrdp_tcp_recv, sck closed\n\r"));
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return 1;
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}
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DEBUG((" in xrdp_tcp_recv, gota get %d bytes\n\r", len));
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init_stream(s, len);
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while (len > 0)
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{
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if (g_is_term())
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{
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DEBUG((" out xrdp_tcp_recv, g_is_term is true\n\r"));
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return 1;
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}
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rcvd = g_tcp_recv(self->sck, s->end, len, 0);
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if (rcvd == -1)
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{
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if (g_tcp_last_error_would_block(self->sck))
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{
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g_sleep(1);
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}
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else
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{
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DEBUG((" error = -1 in xrdp_tcp_recv socket %d\n\r", self->sck));
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return 1;
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}
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}
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else if (rcvd == 0)
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{
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self->sck_closed = 1;
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DEBUG((" error = 0 in xrdp_tcp_recv socket %d\n\r", self->sck));
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return 1;
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}
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else
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{
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s->end += rcvd;
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len -= rcvd;
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}
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}
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DEBUG((" out xrdp_tcp_recv\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_tcp_send(struct xrdp_tcp* self, struct stream* s)
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{
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int len;
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int total;
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int sent;
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if (self->sck_closed)
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{
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DEBUG((" in xrdp_tcp_send, sck closed\n\r"));
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return 1;
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}
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len = s->end - s->data;
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DEBUG((" in xrdp_tcp_send, gota send %d bytes\n\r", len));
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total = 0;
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while (total < len)
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{
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if (g_is_term())
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{
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return 1;
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}
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sent = g_tcp_send(self->sck, s->data + total, len - total, 0);
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if (sent == -1)
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{
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if (g_tcp_last_error_would_block(self->sck))
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{
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g_sleep(1);
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}
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else
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{
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DEBUG((" error = -1 in xrdp_tcp_send socket %d\n\r", self->sck));
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return 1;
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}
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}
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else if (sent == 0)
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{
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self->sck_closed = 1;
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DEBUG((" error = 0 in xrdp_tcp_send socket %d\n\r", self->sck));
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return 1;
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}
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else
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{
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total = total + sent;
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}
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}
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DEBUG((" out xrdp_tcp_send, sent %d bytes ok\n\r", len));
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return 0;
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}
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