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WebSVN – planix.SVN – Blame – /os/branches/feature_posix/sys/src/cmd/cifs/transnt.c – Rev 2

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#include <u.h>
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#include <libc.h>
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#include <fcall.h>
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#include <thread.h>
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#include <9p.h>
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#include "cifs.h"
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static Pkt *
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tnthdr(Session *s, Share *sp, int cmd)
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{
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	Pkt *p;
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	p = cifshdr(s, sp, SMB_COM_NT_TRANSACT);
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	p->tbase = p8(p, 0);		/*  0  Max setup count to return */
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	pl16(p, 0);			/*  1  reserved */
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	pl32(p, 0);			/*  3  Total parameter count */
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	pl32(p, 0);			/*  7  Total data count */
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	pl32(p, 64);			/* 11  Max parameter count to return */
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	pl32(p, (MTU - T2HDRLEN)-64);	/* 15  Max data count to return */
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	pl32(p, 0);			/* 19  Parameter count (in this buffer) */
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	pl32(p, 0);			/* 23  Offset to parameters (in this buffer) */
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	pl32(p, 0);			/* 27  Count of data  in this buffer */
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	pl32(p, 0);			/* 31  Offset to data in this buffer */
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	p8(p, 1);			/* 35  Count of setup words */
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	pl16(p, cmd);			/* 37  setup[0] */
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	pl16(p, 0);			/* padding ??!?!? */
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	pbytes(p);
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	return p;
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}
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static void
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ptntparam(Pkt *p)
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{
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	uchar *pos = p->pos;
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	assert(p->tbase != 0);
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	p->pos = p->tbase +23;
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	pl32(p, (pos - p->buf) - NBHDRLEN); /* param offset */
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	p->tparam = p->pos = pos;
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}
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static void
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ptntdata(Pkt *p)
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{
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	uchar *pos = p->pos;
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	assert(p->tbase != 0);
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	assert(p->tparam != 0);
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	p->pos = p->tbase +3;
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	pl32(p, pos - p->tparam);		/* total param count */
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	p->pos = p->tbase +19;
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	pl32(p, pos - p->tparam);		/* param count */
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	p->pos = p->tbase +31;
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	pl32(p, (pos - p->buf) - NBHDRLEN);	/* data offset */
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	p->tdata = p->pos = pos;
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}
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static int
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tntrpc(Pkt *p)
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{
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	int got;
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	uchar *pos;
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	assert(p->tbase != 0);
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	assert(p->tdata != 0);
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	pos = p->pos;
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	p->pos = p->tbase +7;
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	pl32(p, pos - p->tdata);		/* total data count */
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	p->pos = p->tbase +27;
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	pl32(p, pos - p->tdata);		/* data count */
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	p->pos = pos;
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	if((got = cifsrpc(p)) == -1)
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		return -1;
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	g8(p);				/* Reserved */
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	g8(p);				/* Reserved */
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	g8(p);				/* Reserved */
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	gl32(p);			/* Total parameter count */
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	gl32(p);			/* Total data count */
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	gl32(p);			/* Parameter count in this buffer */
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	p->tparam = p->buf +NBHDRLEN +gl32(p); /* Parameter offset */
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	gl32(p);			/* Parameter displacement */
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	gl32(p);			/* Data count (this buffer); */
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	p->tdata = p->buf +NBHDRLEN +gl32(p); /* Data offset */
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	gl32(p);			/* Data displacement */
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	g8(p);				/* Setup count */
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 	gl16(p);			/* padding ???  */
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	return got;
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}
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static void
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gtntparam(Pkt *p)
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{
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	p->pos = p->tparam;
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}
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static void
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gtntdata(Pkt *p)
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{
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	p->pos = p->tdata;
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}
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int
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TNTquerysecurity(Session *s, Share *sp, int fh, char **usid, char **gsid)
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{
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	Pkt *p;
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	uchar *base;
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	Fmt fmt, *f = &fmt;
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	int n, i, off2owner, off2group;
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	p = tnthdr(s, sp, NT_TRANSACT_QUERY_SECURITY_DESC);
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	ptntparam(p);
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	pl16(p, fh); 		/* File handle */
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	pl16(p, 0); 		/* Reserved */
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	pl32(p, QUERY_OWNER_SECURITY_INFORMATION |
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		QUERY_GROUP_SECURITY_INFORMATION);
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	ptntdata(p);
128 
 
129 
	if(tntrpc(p) == -1){
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		free(p);
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		return -1;
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	}
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134 
	gtntdata(p);
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	base = p->pos;
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	gl16(p);			/* revision */
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	gl16(p);			/* type */
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	off2owner = gl32(p);		/* offset to owner */
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	off2group = gl32(p);		/* offset to group */
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	gl32(p);
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	gl32(p);
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	if(off2owner){
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		p->pos = base +  off2owner;
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		fmtstrinit(f);
147 
		fmtprint(f, "S-%ud", g8(p));	/* revision */
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		n = g8(p);			/* num auth */
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		fmtprint(f, "-%llud", gb48(p));	/* authority */
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		for(i = 0; i < n; i++)
151 
			fmtprint(f, "-%ud", gl32(p));	/* sub-authorities */
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		*usid = fmtstrflush(f);
153 
	}
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	if(off2group){
156 
		p->pos = base +  off2group;
157 
		fmtstrinit(f);
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		fmtprint(f, "S-%ud", g8(p));	/* revision */
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		n = g8(p);			/* num auth */
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		fmtprint(f, "-%llud", gb48(p));	/* authority */
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		for(i = 0; i < n; i++)
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			fmtprint(f, "-%ud", gl32(p));	/* sub-authorities */
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		*gsid = fmtstrflush(f);
164 
	}
165 
	free(p);
166 
	return 0;
167 
}