mirror of
https://github.com/oliverschmidt/contiki.git
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functions for converting between host and network byte order. These names are the de facto standard names for this functionality because of the original BSD TCP/IP implementation. But they cause problems for uIP/Contiki: some platforms define these names themselves (Mac OS, most notably), causing compilation problems for Contiki on those platforms. This commit changes all htons to uip_htons instead. Same goes for htonl, ntohs, and ntohl. All-caps versions as well.
756 lines
24 KiB
C
756 lines
24 KiB
C
/*
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* Copyright (c) 2001, Adam Dunkels.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This file is part of the uIP TCP/IP stack.
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*
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* $Id: vnc-viewer.c,v 1.4 2010/10/19 18:29:03 adamdunkels Exp $
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*
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*/
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/* A micro implementation of a VNC client. VNC is a protocol for
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remote network displays. See http://www.uk.research.att.com/vnc/
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for information about VNC.
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*/
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#include "vnc-draw.h"
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#include "net/uip.h"
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#include "vnc-viewer.h"
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#include <string.h> /* XXX for memcpy */
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#include <stdio.h> /* XXX for printf */
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/* RFB server initial handshaking string. */
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#define RFB_SERVER_VERSION_STRING rfb_server_version_string
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/* "RFB 003.003" */
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static u8_t rfb_server_version_string[12] =
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{82,70,66,32,48,48,51,46,48,48,51,10};
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#if 0
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#define PRINTF(x)
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#else
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#define PRINTF(x) printf x
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#endif
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#ifndef NULL
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#define NULL (void *)0
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#endif
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static struct vnc_viewer_state vnc_viewer_state;
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#define vs (&vnc_viewer_state)
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/*-----------------------------------------------------------------------------------*/
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void
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vnc_viewer_init(void)
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{
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}
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/*-----------------------------------------------------------------------------------*/
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void
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vnc_viewer_close(void)
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{
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vs->close = 1;
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}
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/*-----------------------------------------------------------------------------------*/
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void
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vnc_viewer_connect(u16_t *server, u8_t display)
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{
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struct uip_conn *conn;
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vnc_draw_init();
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memset(vs, 0, sizeof(struct vnc_viewer_state));
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conn = uip_connect((uip_ipaddr_t *)server, uip_htons(5900 + display));
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if(conn == NULL) {
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return;
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}
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tcp_markconn(conn, NULL);
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vs->close = 0;
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}
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/*-----------------------------------------------------------------------------------*/
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static void
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senddata(void)
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{
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register u8_t *dataptr;
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u16_t dataleft;
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dataptr = (u8_t *)uip_appdata;
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switch(vs->sendmsg) {
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case VNC_SEND_VERSION:
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PRINTF(("Sending VERSION_STRING\n"));
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uip_send(RFB_SERVER_VERSION_STRING, sizeof(RFB_SERVER_VERSION_STRING));
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break;
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case VNC_SEND_AUTH:
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/* Send 16 bytes of encrypted challange response. */
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/* XXX: not implemented. */
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PRINTF(("Sending AUTH\n"));
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uip_send(uip_appdata, 16);
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break;
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case VNC_SEND_CINIT:
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PRINTF(("Sending CINIT\n"));
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/* Send one byte of client init. */
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*(u8_t *)dataptr = 1;
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uip_send(uip_appdata, 1);
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break;
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case VNC_SEND_PFMT:
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PRINTF(("Sending PFMT\n"));
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((struct rfb_set_pixel_format *)dataptr)->type = RFB_SET_PIXEL_FORMAT;
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/* Set to BGR233 pixel format. */
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((struct rfb_set_pixel_format *)dataptr)->format.bps = 8;
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((struct rfb_set_pixel_format *)dataptr)->format.depth = 8;
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((struct rfb_set_pixel_format *)dataptr)->format.endian = 1;
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((struct rfb_set_pixel_format *)dataptr)->format.truecolor = 1;
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((struct rfb_set_pixel_format *)dataptr)->format.red_max = uip_htons(7);
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((struct rfb_set_pixel_format *)dataptr)->format.green_max = uip_htons(7);
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((struct rfb_set_pixel_format *)dataptr)->format.blue_max = uip_htons(3);
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((struct rfb_set_pixel_format *)dataptr)->format.red_shift = 0;
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((struct rfb_set_pixel_format *)dataptr)->format.green_shift = 3;
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((struct rfb_set_pixel_format *)dataptr)->format.blue_shift = 6;
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uip_send(uip_appdata, sizeof(struct rfb_set_pixel_format));
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break;
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case VNC_SEND_ENCODINGS:
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PRINTF(("Sending ENCODINGS\n"));
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((struct rfb_set_encodings *)dataptr)->type = RFB_SET_ENCODINGS;
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((struct rfb_set_encodings *)dataptr)->encodings = uip_htons(1);
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dataptr += sizeof(struct rfb_set_encodings);
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dataptr[0] = dataptr[1] = dataptr[2] = 0;
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dataptr[3] = RFB_ENC_RAW;
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/* ((u8_t *)dataptr + sizeof(struct rfb_set_encodings))[4] =
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((u8_t *)dataptr + sizeof(struct rfb_set_encodings))[5] =
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((u8_t *)dataptr + sizeof(struct rfb_set_encodings))[6] = 0;
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((u8_t *)dataptr + sizeof(struct rfb_set_encodings))[7] = RFB_ENC_RRE;*/
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uip_send(uip_appdata, sizeof(struct rfb_set_encodings) + 4);
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break;
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case VNC_SEND_UPDATERQ:
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((struct rfb_fb_update_request *)dataptr)->type = RFB_FB_UPDATE_REQ;
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((struct rfb_fb_update_request *)dataptr)->incremental = 0;
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((struct rfb_fb_update_request *)dataptr)->x = uip_htons(vnc_draw_viewport_x());
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((struct rfb_fb_update_request *)dataptr)->y = uip_htons(vnc_draw_viewport_y());
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((struct rfb_fb_update_request *)dataptr)->w = uip_htons(vnc_draw_viewport_w());
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((struct rfb_fb_update_request *)dataptr)->h = uip_htons(vnc_draw_viewport_h());
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uip_send(uip_appdata, sizeof(struct rfb_fb_update_request));
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break;
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case VNC_SEND_UPDATERQ_INC:
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((struct rfb_fb_update_request *)dataptr)->type = RFB_FB_UPDATE_REQ;
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((struct rfb_fb_update_request *)dataptr)->incremental = 1;
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((struct rfb_fb_update_request *)dataptr)->x = uip_htons(vnc_draw_viewport_x());
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((struct rfb_fb_update_request *)dataptr)->y = uip_htons(vnc_draw_viewport_y());
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((struct rfb_fb_update_request *)dataptr)->w = uip_htons(vnc_draw_viewport_w());
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((struct rfb_fb_update_request *)dataptr)->h = uip_htons(vnc_draw_viewport_h());
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uip_send(uip_appdata, sizeof(struct rfb_fb_update_request));
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break;
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case VNC_SEND_EVENTS:
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dataleft = uip_mss();
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vs->eventptr_unacked = vs->eventptr_acked;
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while(vs->eventptr_unacked != vs->eventptr_next &&
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dataleft > sizeof(struct rfb_key_event)) {
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switch(vs->event_queue[vs->eventptr_unacked].type) {
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case VNC_POINTER_EVENT:
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((struct rfb_pointer_event *)dataptr)->type = RFB_POINTER_EVENT;
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((struct rfb_pointer_event *)dataptr)->buttonmask =
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vs->event_queue[vs->eventptr_unacked].ev.ptr.buttonmask;
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((struct rfb_pointer_event *)dataptr)->x =
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uip_htons(vs->event_queue[vs->eventptr_unacked].ev.ptr.x);
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((struct rfb_pointer_event *)dataptr)->y =
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uip_htons(vs->event_queue[vs->eventptr_unacked].ev.ptr.y);
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/* uip_send(uip_appdata, sizeof(struct rfb_pointer_event));*/
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dataptr += sizeof(struct rfb_pointer_event);
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dataleft -= sizeof(struct rfb_pointer_event);
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break;
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case VNC_KEY_EVENT:
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PRINTF(("Send key event.\n"));
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((struct rfb_key_event *)dataptr)->type = RFB_KEY_EVENT;
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((struct rfb_key_event *)dataptr)->down =
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vs->event_queue[vs->eventptr_unacked].ev.key.down;
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((struct rfb_key_event *)dataptr)->key[0] =
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((struct rfb_key_event *)dataptr)->key[1];
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((struct rfb_key_event *)dataptr)->key[2] =
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vs->event_queue[vs->eventptr_unacked].ev.key.key >> 8;
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((struct rfb_key_event *)dataptr)->key[3] =
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vs->event_queue[vs->eventptr_unacked].ev.key.key & 0xff;
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/* uip_send(uip_appdata, sizeof(struct rfb_key_event));*/
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dataptr += sizeof(struct rfb_key_event);
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dataleft -= sizeof(struct rfb_key_event);
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break;
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case VNC_UPDATERQ_EVENT:
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((struct rfb_fb_update_request *)dataptr)->type = RFB_FB_UPDATE_REQ;
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((struct rfb_fb_update_request *)dataptr)->incremental = 0;
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((struct rfb_fb_update_request *)dataptr)->x =
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uip_htons(vs->event_queue[vs->eventptr_unacked].ev.urq.x);
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((struct rfb_fb_update_request *)dataptr)->y =
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uip_htons(vs->event_queue[vs->eventptr_unacked].ev.urq.y);
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((struct rfb_fb_update_request *)dataptr)->w =
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uip_htons(vs->event_queue[vs->eventptr_unacked].ev.urq.w);
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((struct rfb_fb_update_request *)dataptr)->h =
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uip_htons(vs->event_queue[vs->eventptr_unacked].ev.urq.h);
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/* uip_send(uip_appdata, sizeof(struct rfb_fb_update_request)); */
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dataptr += sizeof(struct rfb_fb_update_request);
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dataleft -= sizeof(struct rfb_fb_update_request);
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break;
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}
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vs->eventptr_unacked = (vs->eventptr_unacked + 1) % VNC_EVENTQUEUE_SIZE;
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}
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uip_send(uip_appdata, uip_mss() - dataleft);
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break;
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}
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}
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/*-----------------------------------------------------------------------------------*/
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static void
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buffer_data(u8_t *data, u16_t datalen)
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{
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PRINTF(("Buffering %d bytes of data\n", datalen));
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if(vs->buffersize + datalen > VNC_BUFFERSIZE) {
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PRINTF(("Out of buffer space!\n"));
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vs->buffersize = 0;
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return;
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}
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memcpy(&(vs->buffer[vs->buffersize]), data, datalen);
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vs->buffersize += datalen;
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vs->bufferleft -= datalen;
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}
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/*-----------------------------------------------------------------------------------*/
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static void
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clearbuffer(void)
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{
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PRINTF(("Clearing buffer\n"));
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vs->buffersize = 0;
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}
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/*-----------------------------------------------------------------------------------*/
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/* Returns: the amount of bytes actually read. */
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static u16_t
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recv_rectstate(u8_t *dataptr, u16_t datalen)
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{
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u16_t pixels;
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u16_t pixelsleft;
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switch(vs->rectstate) {
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case VNC_RECTSTATE_RAW:
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if(vs->rectstateleft > datalen) {
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pixels = datalen;
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vs->rectstateleft -= datalen;
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} else {
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pixels = vs->rectstateleft;
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datalen = datalen - vs->rectstateleft;
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vs->rectstateleft = 0;
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vs->rectstate = VNC_RECTSTATE_NONE;
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vs->sendmsg = VNC_SEND_NONE;
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vs->waitmsg = VNC_WAIT_NONE;
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vnc_viewer_refresh();
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}
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pixelsleft = pixels;
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while(pixelsleft > 0) {
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if(pixelsleft >= vs->rectstatex2 - vs->rectstatex) {
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vnc_draw_pixelline(vs->rectstatex, vs->rectstatey,
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dataptr,
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vs->rectstatex2 - vs->rectstatex);
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dataptr += vs->rectstatex2 - vs->rectstatex;
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pixelsleft -= vs->rectstatex2 - vs->rectstatex;
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vs->rectstatex = vs->rectstatex0;
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++vs->rectstatey;
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vnc_viewer_refresh();
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} else {
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vnc_draw_pixelline(vs->rectstatex, vs->rectstatey,
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dataptr,
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pixelsleft);
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vs->rectstatex += pixelsleft;
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pixelsleft = 0;
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}
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}
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break;
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case VNC_RECTSTATE_RRE:
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break;
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}
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return pixels;
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}
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/*-----------------------------------------------------------------------------------*/
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/* Returns: the amount of bytes that needs to be buffered before the
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rect can be drawn. */
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static unsigned short
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recv_update_rect(CC_REGISTER_ARG struct rfb_fb_update_rect_hdr *rhdr,
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u16_t dataleft)
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{
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struct rfb_rre_hdr *rrehdr;
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if((rhdr->encoding[0] |
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rhdr->encoding[1] |
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rhdr->encoding[2]) == 0) {
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switch(rhdr->encoding[3]) {
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case RFB_ENC_RAW:
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vs->rectstateleft = (u32_t)uip_htons(rhdr->rect.w) * (u32_t)uip_htons(rhdr->rect.h);
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vs->rectstate = VNC_RECTSTATE_RAW;
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vs->rectstatex0 = vs->rectstatex = uip_htons(rhdr->rect.x);
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vs->rectstatey0 = vs->rectstatey = uip_htons(rhdr->rect.y);
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vs->rectstatew = uip_htons(rhdr->rect.w);
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vs->rectstateh = uip_htons(rhdr->rect.h);
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vs->rectstatex2 = vs->rectstatex0 + vs->rectstatew;
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vs->rectstatey2 = vs->rectstatey0 + vs->rectstateh;
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break;
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case RFB_ENC_RRE:
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rrehdr = (struct rfb_rre_hdr *)((u8_t *)rhdr +
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sizeof(struct rfb_fb_update_rect_hdr));
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PRINTF(("Received RRE subrects %d (%d)\n",
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(uip_htons(rrehdr->subrects[1]) << 16) +
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uip_htons(rrehdr->subrects[0]),
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rrehdr->bgpixel));
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vs->rectstateleft = ((u32_t)(uip_htons(rrehdr->subrects[1]) << 16) +
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(u32_t)uip_htons(rrehdr->subrects[0]));
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vs->rectstate = VNC_RECTSTATE_RRE;
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break;
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default:
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PRINTF(("Bad encoding %02x%02x%02x%02x\n", rhdr->encoding[0],
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rhdr->encoding[1],rhdr->encoding[2],rhdr->encoding[3]));
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break;
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}
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}
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return 0;
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PRINTF(("recv_update_rect: returning%d\n", vs->rectstateleft));
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return sizeof(struct rfb_fb_update_rect_hdr) + vs->rectstateleft;
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}
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/*-----------------------------------------------------------------------------------*/
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/* identify_data():
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*
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* This function looks at the state of the connection (i.e., if it is
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* handshaking or in steady-state) as well as on the contents of the
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* incoming message and returns the number of bytes of data that is to
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* be expected.
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*/
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static u16_t
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identify_data(CC_REGISTER_ARG u8_t *data, u16_t datalen)
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{
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switch(vs->waitmsg) {
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case VNC_WAIT_VERSION:
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/* Expecting version string (12 bytes). */
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return 12;
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break;
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case VNC_WAIT_AUTH:
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return 4;
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break;
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case VNC_WAIT_AUTH_RESPONSE:
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return 1;
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break;
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case VNC_WAIT_SINIT:
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/* XXX: We should check that the entire message header is
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received, otherwise we should buffer it. */
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return sizeof(struct rfb_server_init) +
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((struct rfb_server_init *)uip_appdata)->namelength[3] +
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((struct rfb_server_init *)uip_appdata)->namelength[2];
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case VNC_WAIT_UPDATE:
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case VNC_WAIT_NONE:
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switch(*data) {
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case RFB_FB_UPDATE:
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PRINTF(("RFB FB UPDATE received\n"));
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return sizeof(struct rfb_fb_update);
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case RFB_BELL:
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return 1;
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case RFB_SERVER_CUT_TEXT:
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PRINTF(("Cut text received, unhandled\n"));
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return 8 + (data[6] << 8) + data[7];
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case RFB_SET_COLORMAP_ENTRIES:
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uip_abort();
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PRINTF(("Set colormap entries received, unhandled\n"));
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return 0;
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default:
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uip_abort();
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PRINTF(("Weird message type received (%d)\n", *(u8_t *)uip_appdata));
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return 0;
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}
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break;
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case VNC_WAIT_UPDATE_RECT:
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return sizeof(struct rfb_fb_update_rect_hdr);
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default:
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PRINTF(("identify: bad waitmsg %d\n", vs->waitmsg));
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}
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return 0;
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}
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/*-----------------------------------------------------------------------------------*/
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/* handle_data():
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*
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* Handles the data.
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*/
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static unsigned short
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handle_data(CC_REGISTER_ARG u8_t *data, u16_t datalen)
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{
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switch(vs->waitmsg) {
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case VNC_WAIT_VERSION:
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/* Make sure we get the right version string from the server. */
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/* XXX: not implemented. */
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PRINTF(("Got version, waiting for auth, sending version\n"));
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vs->waitmsg = VNC_WAIT_AUTH;
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vs->sendmsg = VNC_SEND_VERSION;
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break;
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case VNC_WAIT_AUTH:
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switch(data[3]) {
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case RFB_AUTH_FAILED:
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PRINTF(("Connection failed.\n"));
|
|
uip_abort();
|
|
return 0;
|
|
|
|
case RFB_AUTH_NONE:
|
|
vs->sendmsg = VNC_SEND_CINIT;
|
|
vs->waitmsg = VNC_WAIT_SINIT;
|
|
PRINTF(("No authentication needed.\n"));
|
|
break;
|
|
case RFB_AUTH_VNC:
|
|
vs->sendmsg = VNC_SEND_AUTH;
|
|
vs->waitmsg = VNC_WAIT_AUTH_RESPONSE;
|
|
PRINTF(("VNC authentication needed.\n"));
|
|
break;
|
|
}
|
|
break;
|
|
case VNC_WAIT_SINIT:
|
|
/* PRINTF(("Server init: w %d h %d, bps %d, d %d, name '%s'\n",
|
|
uip_htons(((struct rfb_server_init *)data)->width),
|
|
uip_htons(((struct rfb_server_init *)data)->height),
|
|
((struct rfb_server_init *)data)->format.bps,
|
|
((struct rfb_server_init *)data)->format.depth,
|
|
((u8_t *)data + sizeof(struct rfb_server_init))));*/
|
|
vs->w = uip_htons(((struct rfb_server_init *)data)->width);
|
|
vs->h = uip_htons(((struct rfb_server_init *)data)->height);
|
|
vs->sendmsg = VNC_SEND_PFMT;
|
|
vs->waitmsg = VNC_WAIT_NONE;
|
|
break;
|
|
|
|
case VNC_WAIT_UPDATE:
|
|
case VNC_WAIT_NONE:
|
|
switch(*data) {
|
|
case RFB_FB_UPDATE:
|
|
vs->waitmsg = VNC_WAIT_UPDATE_RECT;
|
|
vs->rectsleft = uip_htons(((struct rfb_fb_update *)data)->rects);
|
|
PRINTF(("Handling RFB FB UPDATE for %d rects\n", vs->rectsleft));
|
|
break;
|
|
|
|
case RFB_BELL:
|
|
PRINTF(("BELL\n"));
|
|
break;
|
|
|
|
case RFB_SERVER_CUT_TEXT:
|
|
PRINTF(("Cut text received, unhandled\n"));
|
|
break;
|
|
|
|
case RFB_SET_COLORMAP_ENTRIES:
|
|
PRINTF(("Set colormap entries received, unhandled\n"));
|
|
break;
|
|
|
|
default:
|
|
PRINTF(("Weird message type received (%d)\n", *(u8_t *)data));
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case VNC_WAIT_UPDATE_RECT:
|
|
PRINTF(("Handling data in WAIT_UPDATE_RECT, %d rects left (%d bytes)\n", vs->rectsleft, datalen));
|
|
--vs->rectsleft;
|
|
if(vs->rectsleft > 0) {
|
|
vs->waitmsg = VNC_WAIT_UPDATE_RECT;
|
|
} else {
|
|
vs->waitmsg = VNC_WAIT_NONE;
|
|
vs->sendmsg = VNC_SEND_NONE;
|
|
vs->rectstate = VNC_RECTSTATE_NONE;
|
|
}
|
|
return recv_update_rect((struct rfb_fb_update_rect_hdr *)data, datalen);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
/* newdata():
|
|
*
|
|
* Called whenever new data arrives.
|
|
*
|
|
* First, checks if data needs to be buffered before a previously
|
|
* identified request can be fulfilled. If so, the incoming data is
|
|
* buffered and the data handler is called. If no data needs to be
|
|
* buffered, the code proceeds to identify the incoming request. If
|
|
* the incoming request can be processed immediately (i.e., all data
|
|
* is contained in this message) the data handler is invoked. If data
|
|
* has to be buffered to fulfill the request, this is noted and taken
|
|
* care of the next time this function is invoked (i.e., for the next
|
|
* incoming data chunk).
|
|
*/
|
|
static u8_t
|
|
newdata(void)
|
|
{
|
|
u16_t datalen;
|
|
u16_t readlen;
|
|
u8_t *dataptr;
|
|
|
|
datalen = uip_datalen();
|
|
dataptr = (u8_t *)uip_appdata;
|
|
|
|
PRINTF(("newdata: %d bytes\n", datalen));
|
|
|
|
/* If we are in a "rectstate", meaning that the incoming data is
|
|
part of a rectangle that is being incrementaly drawn on the
|
|
screen, we handle that first. */
|
|
if(vs->rectstate != VNC_RECTSTATE_NONE) {
|
|
readlen = recv_rectstate(dataptr, datalen);
|
|
PRINTF(("newdata: vs->rectstate %d, datalen %d, readlen %d\n",
|
|
vs->rectstate, datalen, readlen));
|
|
datalen -= readlen;
|
|
dataptr += readlen;
|
|
}
|
|
|
|
/* Next, check if we are supposed to buffer data from the incoming
|
|
segment. */
|
|
while(vs->bufferleft > 0 && datalen > 0) {
|
|
if(datalen >= vs->bufferleft) {
|
|
/* There is more data in the incoming chunk than we need to
|
|
buffer, so we buffer as much as we can and handle the
|
|
buffered data, and repeat the (identify->buffer->handle)
|
|
sequence for the data that is left in the incoming chunk. */
|
|
datalen -= vs->bufferleft;
|
|
dataptr += vs->bufferleft;
|
|
buffer_data((u8_t *)uip_appdata, vs->bufferleft);
|
|
handle_data(vs->buffer, vs->buffersize);
|
|
clearbuffer();
|
|
} else { /* datalen < vs->bufferleft */
|
|
/* We need to buffer more data than was received with this
|
|
chunk, so we buffer the avaliable data and return. */
|
|
buffer_data(dataptr, datalen);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Finally, if there is data left in the segment, we handle it. */
|
|
while(datalen > 0) {
|
|
|
|
if(vs->rectstate != VNC_RECTSTATE_NONE) {
|
|
readlen = recv_rectstate(dataptr, datalen);
|
|
PRINTF(("newdata (2): vs->rectstate %d, datalen %d, readlen %d\n",
|
|
vs->rectstate, datalen, readlen));
|
|
datalen -= readlen;
|
|
dataptr += readlen;
|
|
} else {
|
|
|
|
/* We get here if there is data to be identified in the incoming
|
|
chunk. */
|
|
readlen = identify_data(dataptr, datalen);
|
|
|
|
if(readlen == 0) {
|
|
PRINTF(("Identify returned 0\n"));
|
|
return 0;
|
|
}
|
|
|
|
PRINTF(("Reading %d bytes more\n", readlen));
|
|
/* The data has been identified and the amount of data that
|
|
needs to be read to be able to process the data is in the
|
|
"readlen" variable. If the incoming chunk contains enough
|
|
data, we handle it directly, otherwise we buffer the incoming
|
|
data and set the state so that we know that there is more
|
|
data to be buffered. */
|
|
if(readlen > datalen) {
|
|
clearbuffer(); /* Should not be needed, but just in case... */
|
|
vs->bufferleft = readlen;
|
|
buffer_data(dataptr, datalen);
|
|
return 0;
|
|
}
|
|
if(readlen <= datalen) {
|
|
PRINTF(("Before handle_data %d\n", readlen));
|
|
readlen += handle_data(dataptr, readlen);
|
|
PRINTF(("After handle_data %d\n", readlen));
|
|
datalen -= readlen;
|
|
dataptr += readlen;
|
|
}
|
|
|
|
}
|
|
if(datalen > 0) {
|
|
PRINTF(("newdata: there is more data left after first iteration... %d\n", datalen));
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
/* Called when there is nothing else to do - checks for any pending
|
|
events (mouse movements or keypresses). If no events are found, it
|
|
makes sure that we send out an incremental update request. */
|
|
static void
|
|
check_events(void)
|
|
{
|
|
if(vs->sendmsg == VNC_SEND_NONE &&
|
|
vs->eventptr_next != vs->eventptr_acked &&
|
|
vs->eventptr_acked == vs->eventptr_unacked) {
|
|
vs->sendmsg = VNC_SEND_EVENTS;
|
|
}
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
static void
|
|
request_update(void)
|
|
{
|
|
if(vs->sendmsg == VNC_SEND_NONE) {
|
|
vs->sendmsg = VNC_SEND_UPDATERQ_INC;
|
|
vs->waitmsg = VNC_WAIT_UPDATE;
|
|
PRINTF(("request_update: requesting\n"));
|
|
} else {
|
|
PRINTF(("request_update: not requesting\n"));
|
|
}
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
static void
|
|
acked(void)
|
|
{
|
|
switch(vs->sendmsg) {
|
|
case VNC_SEND_PFMT:
|
|
vs->sendmsg = VNC_SEND_ENCODINGS;
|
|
break;
|
|
case VNC_SEND_ENCODINGS:
|
|
vs->sendmsg = VNC_SEND_UPDATERQ;
|
|
vs->waitmsg = VNC_WAIT_UPDATE;
|
|
clearbuffer();
|
|
break;
|
|
case VNC_SEND_EVENTS:
|
|
vs->eventptr_acked = vs->eventptr_unacked;
|
|
vs->sendmsg = VNC_SEND_NONE;
|
|
check_events();
|
|
break;
|
|
default:
|
|
vs->sendmsg = VNC_SEND_NONE;
|
|
break;
|
|
}
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
void
|
|
vnc_viewer_appcall(void * nullptr)
|
|
{
|
|
if(vs->close == 1) {
|
|
uip_close();
|
|
return;
|
|
}
|
|
|
|
if(uip_connected()) {
|
|
vs->sendmsg = VNC_SEND_NONE;
|
|
vs->waitmsg = VNC_WAIT_VERSION;
|
|
return;
|
|
}
|
|
|
|
if(uip_acked()) {
|
|
acked();
|
|
}
|
|
|
|
if(uip_newdata()) {
|
|
newdata();
|
|
}
|
|
|
|
if(vs->sendmsg == VNC_SEND_NONE &&
|
|
vs->waitmsg == VNC_WAIT_NONE &&
|
|
vs->rectstate == VNC_RECTSTATE_NONE) {
|
|
check_events();
|
|
request_update();
|
|
}
|
|
PRINTF(("vs->sendmsg %d, vs->waitmsg %d, vs->rectstate %d\n",
|
|
vs->sendmsg, vs->waitmsg, vs->rectstate));
|
|
|
|
if(uip_rexmit() ||
|
|
uip_newdata() ||
|
|
uip_acked()) {
|
|
senddata();
|
|
} else if(uip_poll()) {
|
|
check_events();
|
|
senddata();
|
|
}
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
void
|
|
vnc_viewer_post_event(u8_t type,
|
|
u16_t data1, u16_t data2,
|
|
u16_t data3, u16_t data4)
|
|
{
|
|
register struct vnc_event *ev;
|
|
struct vnc_event *ev0;
|
|
|
|
ev0 = &(vs->event_queue[(vs->eventptr_next - 1) % VNC_EVENTQUEUE_SIZE]);
|
|
|
|
ev = &(vs->event_queue[vs->eventptr_next]);
|
|
switch(type) {
|
|
case VNC_POINTER_EVENT:
|
|
if(0 && vs->eventptr_next != vs->eventptr_acked &&
|
|
ev0->type == VNC_POINTER_EVENT &&
|
|
data1 == ev0->ev.ptr.buttonmask) {
|
|
ev0->ev.ptr.x = data2;
|
|
ev0->ev.ptr.y = data3;
|
|
return;
|
|
} else {
|
|
ev->type = type;
|
|
ev->ev.ptr.buttonmask = data1;
|
|
ev->ev.ptr.x = data2;
|
|
ev->ev.ptr.y = data3;
|
|
}
|
|
break;
|
|
case VNC_KEY_EVENT:
|
|
PRINTF(("Key event posted\n"));
|
|
ev->type = type;
|
|
ev->ev.key.down = data1;
|
|
ev->ev.key.key = data2;
|
|
break;
|
|
case VNC_UPDATERQ_EVENT:
|
|
PRINTF(("Update request event posted\n"));
|
|
ev->type = type;
|
|
ev->ev.urq.x = data1;
|
|
ev->ev.urq.y = data2;
|
|
ev->ev.urq.w = data3;
|
|
ev->ev.urq.h = data4;
|
|
break;
|
|
}
|
|
vs->eventptr_next = (vs->eventptr_next + 1) % VNC_EVENTQUEUE_SIZE;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|