added xrdp_tcp.c

xrdp/xrdp_tcp.c

@@ -0,0 +1,109 @@
+/*
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+   Copyright (C) Jay Sorg 2004
+
+   tcp layer
+
+*/
+
+#include "xrdp.h"
+
+/*****************************************************************************/
+struct xrdp_tcp* xrdp_tcp_create(struct xrdp_iso* owner)
+{
+  struct xrdp_tcp* self;
+
+  self = (struct xrdp_tcp*)g_malloc(sizeof(struct xrdp_tcp), 1);
+  self->owner = owner;
+  self->in_s = owner->in_s;
+  self->out_s = owner->out_s;
+  return self;
+}
+
+/*****************************************************************************/
+void xrdp_tcp_delete(struct xrdp_tcp* self)
+{
+  g_free(self);
+}
+
+/*****************************************************************************/
+/* get out stream ready for data */
+/* returns error */
+int xrdp_tcp_init(struct xrdp_tcp* self, int len)
+{
+  init_stream(self->out_s, len);
+  return 0;
+}
+
+/*****************************************************************************/
+/* returns error */
+int xrdp_tcp_recv(struct xrdp_tcp* self, int len)
+{
+  int rcvd;
+
+  init_stream(self->in_s, len);
+  while (len > 0)
+  {
+    if (g_is_term())
+      return 1;
+    rcvd = g_tcp_recv(self->sck, self->in_s->end, len, 0);
+    if (rcvd == -1)
+    {
+      if (g_tcp_last_error_would_block(self->sck))
+        g_sleep(1);
+      else
+        return 1;
+    }
+    else if (rcvd == 0)
+      return 1;
+    else
+    {
+      self->in_s->end += rcvd;
+      len -= rcvd;
+    }
+  }
+  return 0;
+}
+
+/*****************************************************************************/
+/* returns error */
+int xrdp_tcp_send(struct xrdp_tcp* self)
+{
+  int len;
+  int total;
+  int sent;
+
+  len = self->out_s->end - self->out_s->data;
+  total = 0;
+  while (total < len)
+  {
+    if (g_is_term())
+      return 1;
+    sent = g_tcp_send(self->sck, self->out_s->data + total, len - total, 0);
+    if (sent == -1)
+    {
+      if (g_tcp_last_error_would_block(self->sck))
+        g_sleep(1);
+      else
+        return 1;
+    }
+    else if (sent == 0)
+      return 1;
+    else
+      total = total + sent;
+  }
+  return 0;
+}