Exemple #1
0
void ssh_packet_wrapper_send_encode_va(SshPacketWrapper down,
                                       SshPacketType type,
                                       va_list va)
{
  /* Format the packet in a separate buffer. */
  ssh_buffer_clear(&down->outgoing_packet);
  ssh_packet_encode_va(&down->outgoing_packet, type, va);

  /* Check that we don't overflow maximum buffer size.  Drop the packet
     if we would. */
  if (ssh_buffer_len(&down->outgoing) +
      ssh_buffer_len(&down->outgoing_packet) >= BUFFER_MAX_SIZE)
    {
      ssh_debug("ssh_packet_wrapper_send_encode_va: flow control problems; "
                "outgoing packet dropped.");
      return;
    }

  /* Append the packet to the outgoing buffer. */
  ssh_buffer_append(&down->outgoing, ssh_buffer_ptr(&down->outgoing_packet),
                    ssh_buffer_len(&down->outgoing_packet));

  /* Reset the callback to ensure that our callback gets called. */
  ssh_stream_set_callback(down->stream, ssh_packet_wrapper_callback,
                          (void *)down);
}
Exemple #2
0
size_t ssh_packet_encode(SshBuffer *buffer, SshPacketType type, ...)
{
  va_list ap;

  va_start(ap, type);

  return ssh_packet_encode_va(buffer, type, ap);
}
void ssh_packet_impl_send_encode_va(SshStream up_stream,
                                    SshPacketType type,
                                    va_list va)
{
  SshPacketImpl up;

  /* Verify that it is a SshPacketImpl stream. */
  if (ssh_stream_get_methods(up_stream) != &ssh_packet_impl_methods)
    ssh_fatal("ssh_packet_impl_can_receive: not a SshPacketImpl stream");
  /* Get the internal context. */
  up = (SshPacketImpl)ssh_stream_get_context(up_stream);

  /* Format the packet in a separate buffer. */
  ssh_buffer_clear(&up->outgoing_packet);
  ssh_packet_encode_va(&up->outgoing_packet, type, va);

  /* Check that we don't overflow maximum buffer size.  Drop the
     packet if we would. */
  if (ssh_buffer_len(&up->outgoing) + ssh_buffer_len(&up->outgoing_packet) >=
      BUFFER_MAX_SIZE)
    {
      ssh_debug("ssh_packet_impl_send_encode_va: "
                "flow control problems; outgoing packet dropped.");
      return;
    }

  /* Append the packet to the outgoing buffer. */
  if (ssh_buffer_append(&up->outgoing,
                        ssh_buffer_ptr(&up->outgoing_packet),
                        ssh_buffer_len(&up->outgoing_packet)) != SSH_BUFFER_OK)
    {
      return;
    }

  /* Restart reads by upper level. */
  ssh_packet_impl_restart_input(up);

  /* Sanity check that we didn't exceed max buffer size. */
  if (ssh_buffer_len(&up->outgoing) > BUFFER_MAX_SIZE)
    ssh_debug("ssh_packet_impl_send: buffer max size exceeded: size %ld",
              (long)ssh_buffer_len(&up->outgoing));
}