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LookingGlass/client/main.c

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/*
Looking Glass - KVM FrameRelay (KVMFR) Client
Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
https://looking-glass.hostfission.com
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., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <getopt.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_syswm.h>
#include <SDL2/SDL_ttf.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include <assert.h>
#include <fontconfig/fontconfig.h>
#include "debug.h"
#include "utils.h"
#include "KVMFR.h"
#include "ivshmem/ivshmem.h"
#include "spice/spice.h"
#include "kb.h"
#include "lg-renderers.h"
struct AppState
{
bool running;
bool started;
TTF_Font *font;
SDL_Point srcSize;
LG_RendererRect dstRect;
SDL_Point cursor;
bool haveCursorPos;
float scaleX, scaleY;
const LG_Renderer * lgr ;
void * lgrData;
SDL_Window * window;
struct KVMFRHeader * shm;
unsigned int shmSize;
};
struct AppParams
{
bool autoResize;
bool allowResize;
bool keepAspect;
bool borderless;
bool center;
int x, y;
unsigned int w, h;
const char * ivshmemSocket;
bool useMipmap;
bool showFPS;
bool useSpice;
const char * spiceHost;
unsigned int spicePort;
bool scaleMouseInput;
bool hideMouse;
};
struct AppState state;
struct AppParams params =
{
.autoResize = false,
.allowResize = true,
.keepAspect = true,
.borderless = false,
.center = true,
.x = 0,
.y = 0,
.w = 1024,
.h = 768,
.ivshmemSocket = "/tmp/ivshmem_socket",
.useMipmap = true,
.showFPS = false,
.useSpice = true,
.spiceHost = "127.0.0.1",
.spicePort = 5900,
.scaleMouseInput = true,
.hideMouse = true
};
inline void updatePositionInfo()
{
int w, h;
SDL_GetWindowSize(state.window, &w, &h);
if (params.keepAspect)
{
const float srcAspect = (float)state.srcSize.y / (float)state.srcSize.x;
const float wndAspect = (float)h / (float)w;
if (wndAspect < srcAspect)
{
state.dstRect.w = (float)h / srcAspect;
state.dstRect.h = h;
state.dstRect.x = (w >> 1) - (state.dstRect.w >> 1);
state.dstRect.y = 0;
}
else
{
state.dstRect.w = w;
state.dstRect.h = (float)w * srcAspect;
state.dstRect.x = 0;
state.dstRect.y = (h >> 1) - (state.dstRect.h >> 1);
}
}
else
{
state.dstRect.x = 0;
state.dstRect.y = 0;
state.dstRect.w = w;
state.dstRect.h = h;
}
state.scaleX = (float)state.srcSize.y / (float)state.dstRect.h;
state.scaleY = (float)state.srcSize.x / (float)state.dstRect.w;
if (state.lgr)
state.lgr->on_resize(state.lgrData, w, h, state.dstRect);
}
int renderThread(void * unused)
{
bool error = false;
struct KVMFRHeader header;
volatile uint32_t * updateCount = &state.shm->updateCount;
while(state.running)
{
// poll until we have a new frame, or we time out
while(header.updateCount == *updateCount && state.running)
{
const struct timespec s =
{
.tv_sec = 0,
.tv_nsec = 1000
};
nanosleep(&s, NULL);
}
if (!state.running)
break;
// we must take a copy of the header, both to let the guest advance and to
// prevent the contained arguments being abused to overflow buffers
memcpy(&header, state.shm, sizeof(struct KVMFRHeader));
__sync_or_and_fetch(&state.shm->flags, KVMFR_HEADER_FLAG_READY);
// check the header's magic and version are valid
if (
memcmp(header.magic, KVMFR_HEADER_MAGIC, sizeof(KVMFR_HEADER_MAGIC)) != 0 ||
header.version != KVMFR_HEADER_VERSION
){
usleep(1000);
continue;
}
// if we have a frame
if (header.flags & KVMFR_HEADER_FLAG_FRAME)
{
// sainty check of the frame format
if (
header.frame.type >= FRAME_TYPE_MAX ||
header.frame.width == 0 ||
header.frame.height == 0 ||
header.frame.stride == 0 ||
header.frame.dataPos == 0 ||
header.frame.dataPos > state.shmSize
){
usleep(1000);
continue;
}
// setup the renderer format with the frame format details
LG_RendererFormat lgrFormat;
lgrFormat.width = header.frame.width;
lgrFormat.height = header.frame.height;
lgrFormat.stride = header.frame.stride;
switch(header.frame.type)
{
case FRAME_TYPE_ARGB:
lgrFormat.pitch = header.frame.stride * 4;
lgrFormat.bpp = 32;
break;
case FRAME_TYPE_RGB:
lgrFormat.pitch = header.frame.stride * 3;
lgrFormat.bpp = 24;
break;
default:
DEBUG_ERROR("Unsupported frameType");
error = true;
break;
}
if (error)
break;
// check the header's dataPos is sane
const size_t dataSize = lgrFormat.height * lgrFormat.pitch;
if (header.frame.dataPos + dataSize > state.shmSize)
{
DEBUG_ERROR("The guest sent an invalid dataPos");
break;
}
// check if we have a compatible renderer
if (!state.lgr || !state.lgr->is_compatible(state.lgrData, lgrFormat))
{
int width, height;
SDL_GetWindowSize(state.window, &width, &height);
LG_RendererParams lgrParams;
lgrParams.window = state.window;
lgrParams.font = state.font;
lgrParams.resample = params.useMipmap;
lgrParams.showFPS = params.showFPS;
lgrParams.width = width;
lgrParams.height = height;
DEBUG_INFO("Data Format: w=%u, h=%u, s=%u, p=%u, bpp=%u",
lgrFormat.width, lgrFormat.height, lgrFormat.stride, lgrFormat.pitch, lgrFormat.bpp);
// first try to reinitialize any existing renderer
if (state.lgr)
{
state.lgr->deinitialize(state.lgrData);
if (state.lgr->initialize(&state.lgrData, lgrParams, lgrFormat))
{
DEBUG_INFO("Reinitialized %s", state.lgr->get_name());
}
else
{
DEBUG_ERROR("Failed to reinitialize %s, trying other renderers", state.lgr->get_name());
state.lgr->deinitialize(state.lgrData);
state.lgr = NULL;
}
}
if (!state.lgr)
{
// probe for a a suitable renderer
for(const LG_Renderer **r = &LG_Renderers[0]; *r; ++r)
{
if (!IS_LG_RENDERER_VALID(*r))
{
DEBUG_ERROR("FIXME: Renderer %d is invalid, skipping", (int)(r - &LG_Renderers[0]));
continue;
}
state.lgrData = NULL;
if (!(*r)->initialize(&state.lgrData, lgrParams, lgrFormat))
{
(*r)->deinitialize(state.lgrData);
continue;
}
state.lgr = *r;
DEBUG_INFO("Initialized %s", (*r)->get_name());
break;
}
if (!state.lgr)
{
DEBUG_INFO("Unable to find a suitable renderer");
return -1;
}
}
state.srcSize.x = header.frame.width;
state.srcSize.y = header.frame.height;
if (params.autoResize)
SDL_SetWindowSize(state.window, header.frame.width, header.frame.height);
updatePositionInfo();
}
const uint8_t * data = (const uint8_t *)state.shm + header.frame.dataPos;
if (!state.lgr->on_frame_event(state.lgrData, data))
{
DEBUG_ERROR("Failed to render the frame");
break;
}
}
// if we have cursor data
if (header.flags & KVMFR_HEADER_FLAG_CURSOR)
{
if (header.cursor.flags & KVMFR_CURSOR_FLAG_POS)
{
state.cursor.x = header.cursor.x;
state.cursor.y = header.cursor.y;
state.haveCursorPos = true;
}
if (header.cursor.flags & KVMFR_CURSOR_FLAG_SHAPE)
{
LG_RendererCursor c = LG_CURSOR_COLOR;
switch(header.cursor.type)
{
case CURSOR_TYPE_COLOR : c = LG_CURSOR_COLOR ; break;
case CURSOR_TYPE_MONOCHROME : c = LG_CURSOR_MONOCHROME ; break;
case CURSOR_TYPE_MASKED_COLOR: c = LG_CURSOR_MASKED_COLOR; break;
default:
DEBUG_ERROR("Invalid cursor type");
break;
}
if (state.lgr)
{
if (!state.lgr->on_mouse_shape(
state.lgrData,
c,
header.cursor.w,
header.cursor.h,
header.cursor.pitch,
header.cursor.shape
))
{
DEBUG_ERROR("Failed to update mouse shape");
break;
}
}
}
if (state.lgr)
{
state.lgr->on_mouse_event(
state.lgrData,
(header.cursor.flags & KVMFR_CURSOR_FLAG_VISIBLE) != 0,
state.cursor.x,
state.cursor.y
);
}
}
if (state.lgr)
state.lgr->render(state.lgrData);
}
if (state.lgr)
state.lgr->deinitialize(state.lgrData);
return 0;
}
int ivshmemThread(void * arg)
{
while(state.running)
if (!ivshmem_process())
{
if (state.running)
{
state.running = false;
DEBUG_ERROR("failed to process ivshmem messages");
}
break;
}
return 0;
}
int spiceThread(void * arg)
{
while(state.running)
if (!spice_process())
{
if (state.running)
{
state.running = false;
DEBUG_ERROR("failed to process spice messages");
}
break;
}
spice_disconnect();
return 0;
}
static inline const uint32_t mapScancode(SDL_Scancode scancode)
{
uint32_t ps2;
if (scancode > (sizeof(usb_to_ps2) / sizeof(uint32_t)) || (ps2 = usb_to_ps2[scancode]) == 0)
{
DEBUG_WARN("Unable to map USB scan code: %x\n", scancode);
return 0;
}
return ps2;
}
int eventThread(void * arg)
{
bool serverMode = false;
bool realignGuest = true;
bool keyDown[SDL_NUM_SCANCODES];
memset(keyDown, 0, sizeof(keyDown));
// ensure mouse acceleration is identical in server mode
SDL_SetHintWithPriority(SDL_HINT_MOUSE_RELATIVE_MODE_WARP, "1", SDL_HINT_OVERRIDE);
while(state.running)
{
SDL_Event event;
if (!SDL_PollEvent(&event))
{
usleep(1000);
continue;
}
if (event.type == SDL_QUIT)
{
state.running = false;
break;
}
if (!params.useSpice)
continue;
switch(event.type)
{
case SDL_KEYDOWN:
{
SDL_Scancode sc = event.key.keysym.scancode;
if (sc == SDL_SCANCODE_SCROLLLOCK)
{
if (event.key.repeat)
break;
serverMode = !serverMode;
spice_mouse_mode(serverMode);
SDL_SetRelativeMouseMode(serverMode);
if (!serverMode)
realignGuest = true;
break;
}
uint32_t scancode = mapScancode(sc);
if (scancode == 0)
break;
if (spice_key_down(scancode))
keyDown[sc] = true;
else
{
DEBUG_ERROR("SDL_KEYDOWN: failed to send message");
break;
}
break;
}
case SDL_KEYUP:
{
SDL_Scancode sc = event.key.keysym.scancode;
if (sc == SDL_SCANCODE_SCROLLLOCK)
break;
// avoid sending key up events when we didn't send a down
if (!keyDown[sc])
break;
uint32_t scancode = mapScancode(sc);
if (scancode == 0)
break;
if (spice_key_up(scancode))
keyDown[sc] = false;
else
{
DEBUG_ERROR("SDL_KEYUP: failed to send message");
break;
}
break;
}
case SDL_MOUSEWHEEL:
if (
!spice_mouse_press (event.wheel.y == 1 ? 4 : 5) ||
!spice_mouse_release(event.wheel.y == 1 ? 4 : 5)
)
{
DEBUG_ERROR("SDL_MOUSEWHEEL: failed to send messages");
break;
}
break;
case SDL_MOUSEMOTION:
{
if (
!serverMode && (
event.motion.x < state.dstRect.x ||
event.motion.x > state.dstRect.x + state.dstRect.w ||
event.motion.y < state.dstRect.y ||
event.motion.y > state.dstRect.y + state.dstRect.h
)
)
{
realignGuest = true;
break;
}
int x = 0;
int y = 0;
if (realignGuest && state.haveCursorPos)
{
x = event.motion.x - state.dstRect.x;
y = event.motion.y - state.dstRect.y;
if (params.scaleMouseInput)
{
x = (float)x * state.scaleX;
y = (float)y * state.scaleY;
}
x -= state.cursor.x;
y -= state.cursor.y;
realignGuest = false;
if (!spice_mouse_motion(x, y))
DEBUG_ERROR("SDL_MOUSEMOTION: failed to send message");
break;
}
x = event.motion.xrel;
y = event.motion.yrel;
if (x != 0 || y != 0)
{
if (params.scaleMouseInput)
{
x = (float)x * state.scaleX;
y = (float)y * state.scaleY;
}
if (!spice_mouse_motion(x, y))
{
DEBUG_ERROR("SDL_MOUSEMOTION: failed to send message");
break;
}
}
break;
}
case SDL_MOUSEBUTTONDOWN:
if (
!spice_mouse_position(event.button.x, event.button.y) ||
!spice_mouse_press(event.button.button)
)
{
DEBUG_ERROR("SDL_MOUSEBUTTONDOWN: failed to send message");
break;
}
break;
case SDL_MOUSEBUTTONUP:
if (
!spice_mouse_position(event.button.x, event.button.y) ||
!spice_mouse_release(event.button.button)
)
{
DEBUG_ERROR("SDL_MOUSEBUTTONUP: failed to send message");
break;
}
break;
case SDL_WINDOWEVENT:
{
switch(event.window.event)
{
case SDL_WINDOWEVENT_ENTER:
realignGuest = true;
break;
case SDL_WINDOWEVENT_SIZE_CHANGED:
updatePositionInfo();
realignGuest = true;
break;
}
break;
}
default:
break;
}
}
return 0;
}
int run()
{
DEBUG_INFO("Looking Glass (" BUILD_VERSION ")");
memset(&state, 0, sizeof(state));
state.running = true;
state.scaleX = 1.0f;
state.scaleY = 1.0f;
if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
DEBUG_ERROR("SDL_Init Failed");
return -1;
}
if (params.showFPS)
{
if (TTF_Init() < 0)
{
DEBUG_ERROR("TTL_Init Failed");
return -1;
}
FcConfig * config = FcInitLoadConfigAndFonts();
if (!config)
{
DEBUG_ERROR("FcInitLoadConfigAndFonts Failed");
return -1;
}
FcPattern * pat = FcNameParse((const FcChar8*)"FreeMono");
FcConfigSubstitute (config, pat, FcMatchPattern);
FcDefaultSubstitute(pat);
FcResult result;
FcChar8 * file = NULL;
FcPattern * font = FcFontMatch(config, pat, &result);
if (font && (FcPatternGetString(font, FC_FILE, 0, &file) == FcResultMatch))
{
state.font = TTF_OpenFont((char *)file, 14);
if (!state.font)
{
DEBUG_ERROR("TTL_OpenFont Failed");
return -1;
}
}
else
{
DEBUG_ERROR("Failed to locate a font for FPS display");
return -1;
}
FcPatternDestroy(pat);
}
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 0);
state.window = SDL_CreateWindow(
"Looking Glass (Client)",
params.center ? SDL_WINDOWPOS_CENTERED : params.x,
params.center ? SDL_WINDOWPOS_CENTERED : params.y,
params.w,
params.h,
(
SDL_WINDOW_SHOWN |
SDL_WINDOW_OPENGL |
(params.allowResize ? SDL_WINDOW_RESIZABLE : 0) |
(params.borderless ? SDL_WINDOW_BORDERLESS : 0)
)
);
// set the compositor hint to bypass for low latency
SDL_SysWMinfo wminfo;
SDL_VERSION(&wminfo.version);
if (SDL_GetWindowWMInfo(state.window, &wminfo))
{
if (wminfo.subsystem == SDL_SYSWM_X11)
{
Atom NETWM_BYPASS_COMPOSITOR = XInternAtom(
wminfo.info.x11.display,
"NETWM_BYPASS_COMPOSITOR",
False);
unsigned long value = 1;
XChangeProperty(
wminfo.info.x11.display,
wminfo.info.x11.window,
NETWM_BYPASS_COMPOSITOR,
XA_CARDINAL,
32,
PropModeReplace,
(unsigned char *)&value,
1
);
}
}
if (!state.window)
{
DEBUG_ERROR("failed to create window");
return -1;
}
SDL_Cursor *cursor = NULL;
if (params.hideMouse)
{
// work around SDL_ShowCursor being non functional
int32_t cursorData[2] = {0, 0};
cursor = SDL_CreateCursor((uint8_t*)cursorData, (uint8_t*)cursorData, 8, 8, 4, 4);
SDL_SetCursor(cursor);
SDL_ShowCursor(SDL_DISABLE);
}
int shm_fd = 0;
SDL_Thread *t_ivshmem = NULL;
SDL_Thread *t_spice = NULL;
SDL_Thread *t_event = NULL;
while(1)
{
if (!ivshmem_connect(params.ivshmemSocket))
{
DEBUG_ERROR("failed to connect to the ivshmem server");
break;
}
if (!(t_ivshmem = SDL_CreateThread(ivshmemThread, "ivshmemThread", NULL)))
{
DEBUG_ERROR("ivshmem create thread failed");
break;
}
state.shm = (struct KVMFRHeader *)ivshmem_get_map();
if (!state.shm)
{
DEBUG_ERROR("Failed to map memory");
break;
}
state.shmSize = ivshmem_get_map_size();
state.shm->hostID = ivshmem_get_id();
if (params.useSpice)
{
if (!spice_connect(params.spiceHost, params.spicePort, ""))
{
DEBUG_ERROR("Failed to connect to spice server");
return 0;
}
while(state.running && !spice_ready())
if (!spice_process())
{
state.running = false;
DEBUG_ERROR("Failed to process spice messages");
break;
}
if (!(t_spice = SDL_CreateThread(spiceThread, "spiceThread", NULL)))
{
DEBUG_ERROR("spice create thread failed");
break;
}
}
if (!(t_event = SDL_CreateThread(eventThread, "eventThread", NULL)))
{
DEBUG_ERROR("gpu create thread failed");
break;
}
// flag the host that we are starting up this is important so that
// the host wakes up if it is waiting on an interrupt, the host will
// also send us the current mouse shape since we won't know it yet
DEBUG_INFO("Waiting for host to signal it's ready...");
__sync_or_and_fetch(&state.shm->flags, KVMFR_HEADER_FLAG_RESTART);
while(state.running && (state.shm->flags & KVMFR_HEADER_FLAG_RESTART))
usleep(1000);
DEBUG_INFO("Host ready, starting session");
while(state.running)
renderThread(NULL);
break;
}
state.running = false;
if (t_event)
SDL_WaitThread(t_event, NULL);
// this needs to happen here to abort any waiting reads
// as ivshmem uses recvmsg which has no timeout
ivshmem_disconnect();
if (t_ivshmem)
SDL_WaitThread(t_ivshmem, NULL);
if (t_spice)
SDL_WaitThread(t_spice, NULL);
if (state.window)
SDL_DestroyWindow(state.window);
if (cursor)
SDL_FreeCursor(cursor);
if (shm_fd)
close(shm_fd);
TTF_Quit();
SDL_Quit();
return 0;
}
void doHelp(char * app)
{
char x[8], y[8];
snprintf(x, sizeof(x), "%d", params.x);
snprintf(y, sizeof(y), "%d", params.y);
fprintf(stderr,
"Looking Glass Client\n"
"Usage: %s [OPTION]...\n"
"Example: %s -h\n"
"\n"
" -h Print out this help\n"
"\n"
" -f PATH Specify the path to the ivshmem socket [current: %s]\n"
"\n"
" -s Disable spice client\n"
" -c HOST Specify the spice host [current: %s]\n"
" -p PORT Specify the spice port [current: %d]\n"
" -j Disable cursor position scaling\n"
" -M Don't hide the host cursor\n"
"\n"
" -m Disable mipmapping\n"
" -v Disable VSync\n"
" -k Enable FPS display\n"
"\n"
" -a Auto resize the window to the guest\n"
" -n Don't allow the window to be manually resized\n"
" -r Don't maintain the aspect ratio\n"
" -d Borderless mode\n"
" -x XPOS Initial window X position [current: %s]\n"
" -y YPOS Initial window Y position [current: %s]\n"
" -w WIDTH Initial window width [current: %u]\n"
" -b HEIGHT Initial window height [current: %u]\n"
"\n"
" -l License information\n"
"\n",
app,
app,
params.ivshmemSocket,
params.spiceHost,
params.spicePort,
params.center ? "center" : x,
params.center ? "center" : y,
params.w,
params.h
);
}
void doLicense()
{
fprintf(stderr,
"\n"
"Looking Glass - KVM FrameRelay (KVMFR) Client\n"
"Copyright(C) 2017 Geoffrey McRae <geoff@hostfission.com>\n"
"https://looking-glass.hostfission.com\n"
"\n"
"This program is free software; you can redistribute it and / or modify it under\n"
"the terms of the GNU General Public License as published by the Free Software\n"
"Foundation; either version 2 of the License, or (at your option) any later\n"
"version.\n"
"\n"
"This program is distributed in the hope that it will be useful, but WITHOUT ANY\n"
"WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A\n"
"PARTICULAR PURPOSE.See the GNU General Public License for more details.\n"
"\n"
"You should have received a copy of the GNU General Public License along with\n"
"this program; if not, write to the Free Software Foundation, Inc., 59 Temple\n"
"Place, Suite 330, Boston, MA 02111 - 1307 USA\n"
"\n"
);
}
int main(int argc, char * argv[])
{
int c;
while((c = getopt(argc, argv, "hf:sc:p:jMmkanrdx:y:w:b:l")) != -1)
switch(c)
{
case '?':
case 'h':
default :
doHelp(argv[0]);
return (c == 'h') ? 0 : -1;
case 'f':
params.ivshmemSocket = optarg;
break;
case 's':
params.useSpice = false;
break;
case 'c':
params.spiceHost = optarg;
break;
case 'p':
params.spicePort = atoi(optarg);
break;
case 'j':
params.scaleMouseInput = false;
break;
case 'M':
params.hideMouse = false;
break;
case 'm':
params.useMipmap = false;
break;
case 'k':
params.showFPS = true;
break;
case 'a':
params.autoResize = true;
break;
case 'n':
params.allowResize = false;
break;
case 'r':
params.keepAspect = false;
break;
case 'd':
params.borderless = true;
break;
case 'x':
params.center = false;
params.x = atoi(optarg);
break;
case 'y':
params.center = false;
params.y = atoi(optarg);
break;
case 'w':
params.w = atoi(optarg);
break;
case 'b':
params.h = atoi(optarg);
break;
case 'l':
doLicense();
return 0;
}
return run();
}
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