mirror of https://github.com/neutrinolabs/xrdp
added xrdp_tcp.c
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64b6d90618
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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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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)
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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->owner = 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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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, int len)
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{
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init_stream(self->out_s, len);
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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, int len)
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{
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int rcvd;
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init_stream(self->in_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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return 1;
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rcvd = g_tcp_recv(self->sck, self->in_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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g_sleep(1);
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else
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return 1;
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}
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else if (rcvd == 0)
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return 1;
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else
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{
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self->in_s->end += rcvd;
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len -= rcvd;
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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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/* returns error */
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int xrdp_tcp_send(struct xrdp_tcp* self)
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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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len = self->out_s->end - self->out_s->data;
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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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return 1;
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sent = g_tcp_send(self->sck, self->out_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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g_sleep(1);
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else
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return 1;
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}
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else if (sent == 0)
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return 1;
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else
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total = total + sent;
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}
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return 0;
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}
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