srvnet.c

一个linux下的根文件系统的源码

/*
 * Copyright (c) 1999-2001, 2003 Greg Haerr <[e-mail]>
 * Portions Copyright (c) 2002, 2003 by Koninklijke Philips Electronics N.V.
 * Copyright (c) 1999 Alex Holden <[e-mail]>
 * Copyright (c) 2000 Vidar Hokstad
 * Copyright (c) 2000 Morten Rolland <[e-mail]>
 * Portions Copyright (c) 1991 David I. Bell
 *
 * Permission is granted to use, distribute, or modify this source,
 * provided that this copyright notice remains intact.
 *
 * Completely rewritten for speed by Greg Haerr
 *
 * This is the server side of the network interface, which accepts
 * connections from clients, receives functions from them, and dispatches
 * events to them.
 */
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/socket.h>
#if HAVE_SHAREDMEM_SUPPORT
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#endif
#if ELKS
#include <linuxmt/na.h>
#elif __ECOS
#include <netinet/in.h>

#else
#ifndef TRIMEDIA
#include <sys/un.h>
#endif
#endif
#include "serv.h"
#include "nxproto.h"

/* fix bad MIPS sys headers...*/
#ifndef SOCK_STREAM
#define SOCK_STREAM	2	/* <asm/socket.h>*/
#endif

extern	int		un_sock;
extern	GR_CLIENT	*root_client;
extern	int		current_fd;

static int GsWriteType(int,short);

/*
 * Wrapper functions called after full packet read
 */


#if (!MW_FEATURE_TIMERS) || (!MW_FEATURE_IMAGES) || (!defined(HAVE_FILEIO))
static void
GrNotImplementedWrapper(void *r)
{
    EPRINTF("nano-X: Function %s() not implemented\n", curfunc);
}
#endif

static void 
GrOpenWrapper(void *r)
{
	nxOpenReq *req = r;

	/* store process id of client*/
	curclient->processid = req->pid;

	GrOpen();
}

static void
GrCloseWrapper(void *r)
{
	GrClose();
}

static void
GrGetScreenInfoWrapper(void *r)
{
	GR_SCREEN_INFO si;

	GrGetScreenInfo(&si);
	GsWriteType(current_fd,GrNumGetScreenInfo);
	GsWrite(current_fd, &si, sizeof(si));
}

static void
GrGetSysColorWrapper(void *r)
{
	nxGetSysColorReq *req = r;
	GR_COLOR color = GrGetSysColor(req->index);

	GsWriteType(current_fd, GrNumGetSysColor);
	GsWrite(current_fd, &color, sizeof(color));
}

static void
GrNewWindowWrapper(void *r)
{
	nxNewWindowReq *req = r;
	GR_WINDOW_ID	wid;

	wid = GrNewWindow(req->parentid, req->x, req->y, req->width,
		req->height, req->bordersize, req->backgroundcolor,
		req->bordercolor);

	GsWriteType(current_fd,GrNumNewWindow);
	GsWrite(current_fd, &wid, sizeof(wid));
}


static void
GrNewPixmapWrapper(void *r)
{
	nxNewPixmapReq *req = r;
	GR_WINDOW_ID	wid;

        /* FIXME: Add support for passing info about shared memory
	 * segment
	 */
	wid = GrNewPixmap(req->width, req->height, 0);

	GsWriteType(current_fd,GrNumNewPixmap);
	GsWrite(current_fd, &wid, sizeof(wid));
}

static void
GrNewInputWindowWrapper(void *r)
{
	nxNewInputWindowReq *req = r;
	GR_WINDOW_ID         wid;

	wid = GrNewInputWindow(req->parentid, req->x, req->y, req->width,
		req->height);
	GsWriteType(current_fd,GrNumNewInputWindow);
	GsWrite(current_fd, &wid, sizeof(wid));
}

static void
GrDestroyWindowWrapper(void *r)
{
	nxDestroyWindowReq *req = r;

	GrDestroyWindow(req->windowid);
}

static void
GrNewGCWrapper(void *r)
{
	GR_GC_ID gc = GrNewGC();

	GsWriteType(current_fd,GrNumNewGC);
	GsWrite(current_fd, &gc, sizeof(gc));
}

static void
GrCopyGCWrapper(void *r)
{
	nxCopyGCReq *req = r;
	GR_GC_ID     gcnew;

	gcnew = GrCopyGC(req->gcid);
	GsWriteType(current_fd,GrNumCopyGC);
	GsWrite(current_fd, &gcnew, sizeof(gcnew));
}

static void
GrGetGCInfoWrapper(void *r)
{
	nxGetGCInfoReq *req = r;
	GR_GC_INFO      gcinfo;

	GrGetGCInfo(req->gcid, &gcinfo);
	GsWriteType(current_fd,GrNumGetGCInfo);
	GsWrite(current_fd, &gcinfo, sizeof(gcinfo));
}

static void
GrDestroyGCWrapper(void *r)
{
	nxDestroyGCReq *req = r;

	GrDestroyGC(req->gcid);
}

static void
GrNewRegionWrapper(void *r)
{
	GR_REGION_ID region = GrNewRegion();

	GsWriteType(current_fd, GrNumNewRegion);
	GsWrite(current_fd, &region, sizeof(region));
}

static void
GrDestroyRegionWrapper(void *r)
{
	nxDestroyRegionReq *req = r;

	GrDestroyRegion(req->regionid);
}

static void
GrIntersectRegionWrapper(void *r)
{
	nxIntersectRegionReq *req = r;

	GrIntersectRegion(req->regionid, req->srcregionid1,
		req->srcregionid2);
}

static void
GrUnionRectWithRegionWrapper(void *r)
{
	nxUnionRectWithRegionReq *req = r;

	GrUnionRectWithRegion(req->regionid, &(req->rect));
}

static void
GrUnionRegionWrapper(void *r)
{
	nxUnionRegionReq *req = r;

	GrUnionRegion(req->regionid, req->srcregionid1, req->srcregionid2);
}

static void
GrSubtractRegionWrapper(void *r)
{
	nxSubtractRegionReq *req = r;

	GrSubtractRegion(req->regionid, req->srcregionid1, req->srcregionid2);
}

static void
GrXorRegionWrapper(void *r)
{
	nxXorRegionReq *req = r;

	GrXorRegion(req->regionid, req->srcregionid1, req->srcregionid2);
}

static void
GrPointInRegionWrapper(void *r)
{
	nxPointInRegionReq *req = r;
	GR_BOOL ret_value = GrPointInRegion(req->regionid, req->x, req->y);
		
	GsWriteType(current_fd, GrNumPointInRegion);
	GsWrite(current_fd, &ret_value, sizeof(ret_value));
}

static void
GrRectInRegionWrapper(void *r)
{
	nxRectInRegionReq *req = r;
	unsigned short ret_value;
	
	ret_value = (unsigned short)GrRectInRegion(req->regionid,
		req->x, req->y, req->w, req->h);
		
	GsWriteType(current_fd, GrNumRectInRegion);
	GsWrite(current_fd, &ret_value, sizeof(ret_value));
}

static void
GrEmptyRegionWrapper(void *r)
{
	nxEmptyRegionReq *req = r;
	GR_BOOL		  ret_value;
	
	ret_value = GrEmptyRegion(req->regionid);
	GsWriteType(current_fd, GrNumEmptyRegion);
	GsWrite(current_fd, &ret_value, sizeof(ret_value));
}

static void
GrEqualRegionWrapper(void *r)
{
	nxEqualRegionReq *req = r;
	GR_BOOL		  ret_value;
	
	ret_value = GrEqualRegion(req->region1, req->region2);
	GsWriteType(current_fd, GrNumEqualRegion);
	GsWrite(current_fd, &ret_value, sizeof(ret_value));
}

static void
GrOffsetRegionWrapper(void *r)
{
	nxOffsetRegionReq *req = r;
	
	GrOffsetRegion(req->region, req->dx, req->dy);
}

static void
GrSetGCRegionWrapper(void *r)
{
	nxSetGCRegionReq *req = r;

	GrSetGCRegion(req->gcid, req->regionid);
}

static void
GrSetGCClipOriginWrapper(void *r)
{
	nxSetGCClipOriginReq *req = r;
	GrSetGCClipOrigin(req->gcid, req->xoff, req->yoff);
}

static void
GrSetGCGraphicsExposureWrapper(void *r)
{
	nxSetGCGraphicsExposureReq *req = r;
	GrSetGCGraphicsExposure(req->gcid, req->exposure);
}

static void
GrGetRegionBoxWrapper(void *r)
{
	nxRectInRegionReq *req = r;
	GR_BOOL		   ret_value;
	GR_RECT		   ret_rect;

	ret_value = GrGetRegionBox(req->regionid, &ret_rect);
		
	GsWriteType(current_fd, GrNumGetRegionBox);
	GsWrite(current_fd, &ret_rect, sizeof(ret_rect));
	GsWriteType(current_fd, GrNumGetRegionBox);
	GsWrite(current_fd, &ret_value, sizeof(ret_value));
}

static void
GrNewPolygonRegionWrapper(void *r)
{
	GR_REGION_ID region;
	nxNewPolygonRegionReq *req = r;
	int count;
	
	/* FIXME: unportable method, depends on sizeof(int) in GR_POINT*/
	count = GetReqVarLen(req) / sizeof(GR_POINT);	
	region = GrNewPolygonRegion(req->mode, count,
		(GR_POINT *)GetReqData(req));
	
	GsWriteType(current_fd, GrNumNewPolygonRegion);
	GsWrite(current_fd, &region, sizeof(region));
}

static void
GrMapWindowWrapper(void *r)
{
	nxMapWindowReq *req = r;

	GrMapWindow(req->windowid);
}

static void
GrUnmapWindowWrapper(void *r)
{
	nxUnmapWindowReq *req = r;

	GrUnmapWindow(req->windowid);
}

static void
GrRaiseWindowWrapper(void *r)
{
	nxRaiseWindowReq *req = r;

	GrRaiseWindow(req->windowid);
}

static void
GrLowerWindowWrapper(void *r)
{
	nxLowerWindowReq *req = r;

	GrLowerWindow(req->windowid);
}

static void
GrMoveWindowWrapper(void *r)
{
	nxMoveWindowReq *req = r;

	GrMoveWindow(req->windowid, req->x, req->y);
}

static void
GrResizeWindowWrapper(void *r)
{
	nxResizeWindowReq *req = r;

	GrResizeWindow(req->windowid, req->width, req->height);
}

static void
GrReparentWindowWrapper(void *r)
{
	nxReparentWindowReq *req = r;

	GrReparentWindow(req->windowid, req->parentid, req->x, req->y);
}

static void
GrGetWindowInfoWrapper(void *r)
{
	nxGetWindowInfoReq *req = r;
	GR_WINDOW_INFO      wi;

	GrGetWindowInfo(req->windowid, &wi);
	GsWriteType(current_fd,GrNumGetWindowInfo);
	GsWrite(current_fd, &wi, sizeof(wi));
}

static void
GrGetFontInfoWrapper(void *r)
{
	nxGetFontInfoReq *req = r;
	GR_FONT_INFO      fi;

	GrGetFontInfo(req->fontid, &fi);
	GsWriteType(current_fd,GrNumGetFontInfo);
	GsWrite(current_fd, &fi, sizeof(fi));
}

static void
GrGetFocusWrapper(void *r)
{
	GR_WINDOW_ID wid = GrGetFocus();

	GsWriteType(current_fd, GrNumGetFocus);
	GsWrite(current_fd, &wid, sizeof(wid));
}

static void
GrSetFocusWrapper(void *r)
{
	nxSetFocusReq *req = r;

	GrSetFocus(req->windowid);
}

static void
GrSetWindowCursorWrapper(void *r)
{
	nxSetWindowCursorReq *req = r;

	GrSetWindowCursor(req->windowid, req->cursorid);
}

static void
GrClearAreaWrapper(void *r)
{
	nxClearAreaReq *req = r;

	GrClearArea(req->windowid, req->x, req->y, req->width,
		req->height, req->exposeflag);
}

static void
GrSelectEventsWrapper(void *r)
{
	nxSelectEventsReq *req = r;

	GrSelectEvents(req->windowid, req->eventmask);
}

static void
GrGetNextEventWrapper(void *r)
{
#if 1
	/* tell main loop to call Finish routine on event*/
	curclient->waiting_for_event = TRUE;
#else
	GR_EVENT evt;

	/* first check if any event ready*/
	GrCheckNextEvent(&evt);
	if(evt.type == GR_EVENT_TYPE_NONE) {
		/* tell main loop to call Finish routine on event*/
		curclient->waiting_for_event = TRUE;
		return;
	}

	GsWriteType(current_fd, GrNumGetNextEvent);
	GsWrite(current_fd, &evt, sizeof(evt));
	if(evt.type == GR_EVENT_TYPE_CLIENT_DATA) {
		GsWrite(fd, evt.data, evt.datalen);
		free(evt.data);
	}
#endif
}

/* Complete the GrGetNextEvent call from client.
 * The client is still waiting on a read at this point.
 */
void
GrGetNextEventWrapperFinish(int fd)
{
	GR_EVENT evt;
	GR_EVENT_CLIENT_DATA *cde;

	/* get the event and pass it to client*/
	/* this will never be GR_EVENT_TYPE_NONE*/
	GrCheckNextEvent(&evt);

	GsWriteType(fd,GrNumGetNextEvent);
	GsWrite(fd, &evt, sizeof(evt));
	if(evt.type == GR_EVENT_TYPE_CLIENT_DATA) {
		cde = (GR_EVENT_CLIENT_DATA *)&evt;
		if(cde->data) {
			GsWrite(fd, cde->data, cde->datalen);
			free(cde->data);
		} cde->datalen = 0;
	}
}

static void
GrCheckNextEventWrapper(void *r)
{
	GR_EVENT evt;
	GR_EVENT_CLIENT_DATA *cde;

	GrCheckNextEvent(&evt);

	GsWriteType(current_fd,GrNumGetNextEvent);
	GsWrite(current_fd, &evt, sizeof(evt));
	if(evt.type == GR_EVENT_TYPE_CLIENT_DATA) {
		cde = (GR_EVENT_CLIENT_DATA *)&evt;
		if(cde->data) {
			GsWrite(current_fd, cde->data, cde->datalen);
			free(cde->data);
		} cde->datalen = 0;
	}
}

static void
GrPeekEventWrapper(void *r)
{
	GR_EVENT evt;
	GR_CHAR	 ret;
	GR_EVENT_CLIENT_DATA *cde;

	ret = GrPeekEvent(&evt);

	GsWriteType(current_fd,GrNumPeekEvent);
	GsWrite(current_fd, &evt, sizeof(evt));
	if(evt.type == GR_EVENT_TYPE_CLIENT_DATA) {
		cde = (GR_EVENT_CLIENT_DATA *)&evt;