| /* |
| * Copyright (c) 2001, Adam Dunkels. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS |
| * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
| * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * This file is part of the uIP TCP/IP stack. |
| * |
| * $Id: vnc-viewer.c,v 1.9 2004/09/12 07:32:05 adamdunkels Exp $ |
| * |
| */ |
| |
| /* A micro implementation of a VNC client. VNC is a protocol for |
| remote network displays. See http://www.uk.research.att.com/vnc/ |
| for information about VNC. |
| */ |
| |
| #include "vnc-draw.h" |
| #include "uip.h" |
| #include "vnc-viewer.h" |
| |
| #include <string.h> /* XXX for memcpy */ |
| #include <stdio.h> /* XXX for printf */ |
| |
| /* RFB server initial handshaking string. */ |
| #define RFB_SERVER_VERSION_STRING rfb_server_version_string |
| |
| /* "RFB 003.003" */ |
| static u8_t rfb_server_version_string[12] = |
| {82,70,66,32,48,48,51,46,48,48,51,10}; |
| |
| #if 0 |
| #define PRINTF(x) |
| #else |
| #define PRINTF(x) printf x |
| #endif |
| |
| #ifndef NULL |
| #define NULL (void *)0 |
| #endif |
| |
| static struct vnc_viewer_state vnc_viewer_state; |
| #define vs (&vnc_viewer_state) |
| |
| /*-----------------------------------------------------------------------------------*/ |
| void |
| vnc_viewer_init(void) |
| { |
| } |
| /*-----------------------------------------------------------------------------------*/ |
| void |
| vnc_viewer_close(void) |
| { |
| vs->close = 1; |
| } |
| /*-----------------------------------------------------------------------------------*/ |
| void |
| vnc_viewer_connect(u16_t *server, u8_t display) |
| { |
| struct uip_conn *conn; |
| |
| vnc_draw_init(); |
| |
| memset(vs, 0, sizeof(struct vnc_viewer_state)); |
| conn = uip_connect(server, htons(5900 + display)); |
| if(conn == NULL) { |
| return; |
| } |
| tcp_markconn(conn, NULL); |
| |
| vs->close = 0; |
| } |
| /*-----------------------------------------------------------------------------------*/ |
| static void |
| senddata(void) |
| { |
| register u8_t *dataptr; |
| u16_t dataleft; |
| |
| dataptr = (u8_t *)uip_appdata; |
| |
| switch(vs->sendmsg) { |
| case VNC_SEND_VERSION: |
| PRINTF(("Sending VERSION_STRING\n")); |
| uip_send(RFB_SERVER_VERSION_STRING, sizeof(RFB_SERVER_VERSION_STRING)); |
| break; |
| case VNC_SEND_AUTH: |
| /* Send 16 bytes of encrypted challange response. */ |
| /* XXX: not implemented. */ |
| PRINTF(("Sending AUTH\n")); |
| uip_send(uip_appdata, 16); |
| break; |
| case VNC_SEND_CINIT: |
| PRINTF(("Sending CINIT\n")); |
| /* Send one byte of client init. */ |
| *(u8_t *)dataptr = 1; |
| uip_send(uip_appdata, 1); |
| break; |
| case VNC_SEND_PFMT: |
| PRINTF(("Sending PFMT\n")); |
| ((struct rfb_set_pixel_format *)dataptr)->type = RFB_SET_PIXEL_FORMAT; |
| |
| /* Set to BGR233 pixel format. */ |
| ((struct rfb_set_pixel_format *)dataptr)->format.bps = 8; |
| ((struct rfb_set_pixel_format *)dataptr)->format.depth = 8; |
| ((struct rfb_set_pixel_format *)dataptr)->format.endian = 1; |
| ((struct rfb_set_pixel_format *)dataptr)->format.truecolor = 1; |
| ((struct rfb_set_pixel_format *)dataptr)->format.red_max = htons(7); |
| ((struct rfb_set_pixel_format *)dataptr)->format.green_max = htons(7); |
| ((struct rfb_set_pixel_format *)dataptr)->format.blue_max = htons(3); |
| ((struct rfb_set_pixel_format *)dataptr)->format.red_shift = 0; |
| ((struct rfb_set_pixel_format *)dataptr)->format.green_shift = 3; |
| ((struct rfb_set_pixel_format *)dataptr)->format.blue_shift = 6; |
| |
| uip_send(uip_appdata, sizeof(struct rfb_set_pixel_format)); |
| |
| break; |
| case VNC_SEND_ENCODINGS: |
| PRINTF(("Sending ENCODINGS\n")); |
| ((struct rfb_set_encodings *)dataptr)->type = RFB_SET_ENCODINGS; |
| ((struct rfb_set_encodings *)dataptr)->encodings = htons(1); |
| dataptr += sizeof(struct rfb_set_encodings); |
| dataptr[0] = dataptr[1] = dataptr[2] = 0; |
| dataptr[3] = RFB_ENC_RAW; |
| /* ((u8_t *)dataptr + sizeof(struct rfb_set_encodings))[4] = |
| ((u8_t *)dataptr + sizeof(struct rfb_set_encodings))[5] = |
| ((u8_t *)dataptr + sizeof(struct rfb_set_encodings))[6] = 0; |
| ((u8_t *)dataptr + sizeof(struct rfb_set_encodings))[7] = RFB_ENC_RRE;*/ |
| uip_send(uip_appdata, sizeof(struct rfb_set_encodings) + 4); |
| break; |
| case VNC_SEND_UPDATERQ: |
| ((struct rfb_fb_update_request *)dataptr)->type = RFB_FB_UPDATE_REQ; |
| ((struct rfb_fb_update_request *)dataptr)->incremental = 0; |
| ((struct rfb_fb_update_request *)dataptr)->x = htons(vnc_draw_viewport_x()); |
| ((struct rfb_fb_update_request *)dataptr)->y = htons(vnc_draw_viewport_y()); |
| ((struct rfb_fb_update_request *)dataptr)->w = htons(vnc_draw_viewport_w()); |
| ((struct rfb_fb_update_request *)dataptr)->h = htons(vnc_draw_viewport_h()); |
| uip_send(uip_appdata, sizeof(struct rfb_fb_update_request)); |
| break; |
| case VNC_SEND_UPDATERQ_INC: |
| ((struct rfb_fb_update_request *)dataptr)->type = RFB_FB_UPDATE_REQ; |
| ((struct rfb_fb_update_request *)dataptr)->incremental = 1; |
| ((struct rfb_fb_update_request *)dataptr)->x = htons(vnc_draw_viewport_x()); |
| ((struct rfb_fb_update_request *)dataptr)->y = htons(vnc_draw_viewport_y()); |
| ((struct rfb_fb_update_request *)dataptr)->w = htons(vnc_draw_viewport_w()); |
| ((struct rfb_fb_update_request *)dataptr)->h = htons(vnc_draw_viewport_h()); |
| uip_send(uip_appdata, sizeof(struct rfb_fb_update_request)); |
| break; |
| |
| case VNC_SEND_EVENTS: |
| |
| dataleft = uip_mss(); |
| |
| vs->eventptr_unacked = vs->eventptr_acked; |
| while(vs->eventptr_unacked != vs->eventptr_next && |
| dataleft > sizeof(struct rfb_key_event)) { |
| switch(vs->event_queue[vs->eventptr_unacked].type) { |
| case VNC_POINTER_EVENT: |
| ((struct rfb_pointer_event *)dataptr)->type = RFB_POINTER_EVENT; |
| ((struct rfb_pointer_event *)dataptr)->buttonmask = |
| vs->event_queue[vs->eventptr_unacked].ev.ptr.buttonmask; |
| ((struct rfb_pointer_event *)dataptr)->x = |
| htons(vs->event_queue[vs->eventptr_unacked].ev.ptr.x); |
| ((struct rfb_pointer_event *)dataptr)->y = |
| htons(vs->event_queue[vs->eventptr_unacked].ev.ptr.y); |
| /* uip_send(uip_appdata, sizeof(struct rfb_pointer_event));*/ |
| dataptr += sizeof(struct rfb_pointer_event); |
| dataleft -= sizeof(struct rfb_pointer_event); |
| break; |
| case VNC_KEY_EVENT: |
| PRINTF(("Send key event.\n")); |
| ((struct rfb_key_event *)dataptr)->type = RFB_KEY_EVENT; |
| ((struct rfb_key_event *)dataptr)->down = |
| vs->event_queue[vs->eventptr_unacked].ev.key.down; |
| ((struct rfb_key_event *)dataptr)->key[0] = |
| ((struct rfb_key_event *)dataptr)->key[1]; |
| ((struct rfb_key_event *)dataptr)->key[2] = |
| vs->event_queue[vs->eventptr_unacked].ev.key.key >> 8; |
| |
| ((struct rfb_key_event *)dataptr)->key[3] = |
| vs->event_queue[vs->eventptr_unacked].ev.key.key & 0xff; |
| /* uip_send(uip_appdata, sizeof(struct rfb_key_event));*/ |
| dataptr += sizeof(struct rfb_key_event); |
| dataleft -= sizeof(struct rfb_key_event); |
| break; |
| case VNC_UPDATERQ_EVENT: |
| ((struct rfb_fb_update_request *)dataptr)->type = RFB_FB_UPDATE_REQ; |
| ((struct rfb_fb_update_request *)dataptr)->incremental = 0; |
| ((struct rfb_fb_update_request *)dataptr)->x = |
| htons(vs->event_queue[vs->eventptr_unacked].ev.urq.x); |
| ((struct rfb_fb_update_request *)dataptr)->y = |
| htons(vs->event_queue[vs->eventptr_unacked].ev.urq.y); |
| ((struct rfb_fb_update_request *)dataptr)->w = |
| htons(vs->event_queue[vs->eventptr_unacked].ev.urq.w); |
| ((struct rfb_fb_update_request *)dataptr)->h = |
| htons(vs->event_queue[vs->eventptr_unacked].ev.urq.h); |
| /* uip_send(uip_appdata, sizeof(struct rfb_fb_update_request)); */ |
| dataptr += sizeof(struct rfb_fb_update_request); |
| dataleft -= sizeof(struct rfb_fb_update_request); |
| break; |
| } |
| vs->eventptr_unacked = (vs->eventptr_unacked + 1) % VNC_EVENTQUEUE_SIZE; |
| } |
| |
| uip_send(uip_appdata, uip_mss() - dataleft); |
| break; |
| } |
| } |
| /*-----------------------------------------------------------------------------------*/ |
| static void |
| buffer_data(u8_t *data, u16_t datalen) |
| { |
| PRINTF(("Buffering %d bytes of data\n", datalen)); |
| |
| if(vs->buffersize + datalen > VNC_BUFFERSIZE) { |
| PRINTF(("Out of buffer space!\n")); |
| vs->buffersize = 0; |
| return; |
| } |
| |
| memcpy(&(vs->buffer[vs->buffersize]), data, datalen); |
| |
| vs->buffersize += datalen; |
| vs->bufferleft -= datalen; |
| } |
| /*-----------------------------------------------------------------------------------*/ |
| static void |
| clearbuffer(void) |
| { |
| PRINTF(("Clearing buffer\n")); |
| vs->buffersize = 0; |
| } |
| /*-----------------------------------------------------------------------------------*/ |
| /* Returns: the amount of bytes actually read. */ |
| static u16_t |
| recv_rectstate(u8_t *dataptr, u16_t datalen) |
| { |
| u16_t pixels; |
| u16_t pixelsleft; |
| |
| switch(vs->rectstate) { |
| case VNC_RECTSTATE_RAW: |
| |
| if(vs->rectstateleft > datalen) { |
| pixels = datalen; |
| vs->rectstateleft -= datalen; |
| } else { |
| pixels = vs->rectstateleft; |
| datalen = datalen - vs->rectstateleft; |
| vs->rectstateleft = 0; |
| vs->rectstate = VNC_RECTSTATE_NONE; |
| vs->sendmsg = VNC_SEND_NONE; |
| vs->waitmsg = VNC_WAIT_NONE; |
| vnc_viewer_refresh(); |
| } |
| |
| |
| pixelsleft = pixels; |
| while(pixelsleft > 0) { |
| if(pixelsleft >= vs->rectstatex2 - vs->rectstatex) { |
| vnc_draw_pixelline(vs->rectstatex, vs->rectstatey, |
| dataptr, |
| vs->rectstatex2 - vs->rectstatex); |
| dataptr += vs->rectstatex2 - vs->rectstatex; |
| pixelsleft -= vs->rectstatex2 - vs->rectstatex; |
| vs->rectstatex = vs->rectstatex0; |
| ++vs->rectstatey; |
| vnc_viewer_refresh(); |
| } else { |
| vnc_draw_pixelline(vs->rectstatex, vs->rectstatey, |
| dataptr, |
| pixelsleft); |
| vs->rectstatex += pixelsleft; |
| pixelsleft = 0; |
| } |
| |
| } |
| |
| break; |
| case VNC_RECTSTATE_RRE: |
| break; |
| } |
| return pixels; |
| } |
| /*-----------------------------------------------------------------------------------*/ |
| /* Returns: the amount of bytes that needs to be buffered before the |
| rect can be drawn. */ |
| static unsigned short |
| recv_update_rect(register struct rfb_fb_update_rect_hdr *rhdr, |
| u16_t dataleft) |
| { |
| struct rfb_rre_hdr *rrehdr; |
| |
| |
| if((rhdr->encoding[0] | |
| rhdr->encoding[1] | |
| rhdr->encoding[2]) == 0) { |
| switch(rhdr->encoding[3]) { |
| case RFB_ENC_RAW: |
| vs->rectstateleft = (u32_t)htons(rhdr->rect.w) * (u32_t)htons(rhdr->rect.h); |
| vs->rectstate = VNC_RECTSTATE_RAW; |
| vs->rectstatex0 = vs->rectstatex = htons(rhdr->rect.x); |
| vs->rectstatey0 = vs->rectstatey = htons(rhdr->rect.y); |
| vs->rectstatew = htons(rhdr->rect.w); |
| vs->rectstateh = htons(rhdr->rect.h); |
| vs->rectstatex2 = vs->rectstatex0 + vs->rectstatew; |
| vs->rectstatey2 = vs->rectstatey0 + vs->rectstateh; |
| break; |
| |
| case RFB_ENC_RRE: |
| rrehdr = (struct rfb_rre_hdr *)((u8_t *)rhdr + |
| sizeof(struct rfb_fb_update_rect_hdr)); |
| PRINTF(("Received RRE subrects %d (%d)\n", |
| (htons(rrehdr->subrects[1]) << 16) + |
| htons(rrehdr->subrects[0]), |
| rrehdr->bgpixel)); |
| vs->rectstateleft = ((u32_t)(htons(rrehdr->subrects[1]) << 16) + |
| (u32_t)htons(rrehdr->subrects[0])); |
| vs->rectstate = VNC_RECTSTATE_RRE; |
| |
| break; |
| |
| default: |
| PRINTF(("Bad encoding %02x%02x%02x%02x\n", rhdr->encoding[0], |
| rhdr->encoding[1],rhdr->encoding[2],rhdr->encoding[3])); |
| break; |
| } |
| |
| } |
| |
| return 0; |
| |
| PRINTF(("recv_update_rect: returning%d\n", vs->rectstateleft)); |
| return sizeof(struct rfb_fb_update_rect_hdr) + vs->rectstateleft; |
| } |
| /*-----------------------------------------------------------------------------------*/ |
| /* identify_data(): |
| * |
| * This function looks at the state of the connection (i.e., if it is |
| * handshaking or in steady-state) as well as on the contents of the |
| * incoming message and returns the number of bytes of data that is to |
| * be expected. |
| */ |
| static u16_t |
| identify_data(register u8_t *data, u16_t datalen) |
| { |
| switch(vs->waitmsg) { |
| case VNC_WAIT_VERSION: |
| /* Expecting version string (12 bytes). */ |
| return 12; |
| break; |
| case VNC_WAIT_AUTH: |
| return 4; |
| break; |
| case VNC_WAIT_AUTH_RESPONSE: |
| return 1; |
| break; |
| case VNC_WAIT_SINIT: |
| /* XXX: We should check that the entire message header is |
| received, otherwise we should buffer it. */ |
| return sizeof(struct rfb_server_init) + |
| ((struct rfb_server_init *)uip_appdata)->namelength[3] + |
| ((struct rfb_server_init *)uip_appdata)->namelength[2]; |
| |
| case VNC_WAIT_UPDATE: |
| case VNC_WAIT_NONE: |
| switch(*data) { |
| case RFB_FB_UPDATE: |
| PRINTF(("RFB FB UPDATE received\n")); |
| return sizeof(struct rfb_fb_update); |
| |
| case RFB_BELL: |
| return 1; |
| |
| case RFB_SERVER_CUT_TEXT: |
| PRINTF(("Cut text received, unhandled\n")); |
| return 8 + (data[6] << 8) + data[7]; |
| |
| case RFB_SET_COLORMAP_ENTRIES: |
| uip_abort(); |
| PRINTF(("Set colormap entries received, unhandled\n")); |
| return 0; |
| |
| default: |
| uip_abort(); |
| PRINTF(("Weird message type received (%d)\n", *(u8_t *)uip_appdata)); |
| return 0; |
| } |
| break; |
| |
| case VNC_WAIT_UPDATE_RECT: |
| return sizeof(struct rfb_fb_update_rect_hdr); |
| |
| default: |
| PRINTF(("identify: bad waitmsg %d\n", vs->waitmsg)); |
| } |
| |
| return 0; |
| } |
| /*-----------------------------------------------------------------------------------*/ |
| /* handle_data(): |
| * |
| * Handles the data. |
| */ |
| static unsigned short |
| handle_data(register u8_t *data, u16_t datalen) |
| { |
| |
| switch(vs->waitmsg) { |
| case VNC_WAIT_VERSION: |
| /* Make sure we get the right version string from the server. */ |
| /* XXX: not implemented. */ |
| PRINTF(("Got version, waiting for auth, sending version\n")); |
| vs->waitmsg = VNC_WAIT_AUTH; |
| vs->sendmsg = VNC_SEND_VERSION; |
| break; |
| case VNC_WAIT_AUTH: |
| switch(data[3]) { |
| case RFB_AUTH_FAILED: |
| 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", |
| htons(((struct rfb_server_init *)data)->width), |
| 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 = htons(((struct rfb_server_init *)data)->width); |
| vs->h = 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 = 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; |
| } |
| /*-----------------------------------------------------------------------------------*/ |