/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <u.h>#include <libc.h>#include <fcall.h>#include <thread.h>#include <9p.h>#include "cifs.h" static Pkt *tnthdr(Session *s, Share *sp, int cmd){	Pkt *p; 	p = cifshdr(s, sp, SMB_COM_NT_TRANSACT);	p->tbase = p8(p, 0);		/*  0  Max setup count to return */	pl16(p, 0);			/*  1  reserved */	pl32(p, 0);			/*  3  Total parameter count */	pl32(p, 0);			/*  7  Total data count */	pl32(p, 64);			/* 11  Max parameter count to return */	pl32(p, (MTU - T2HDRLEN)-64);	/* 15  Max data count to return */	pl32(p, 0);			/* 19  Parameter count (in this buffer) */	pl32(p, 0);			/* 23  Offset to parameters (in this buffer) */	pl32(p, 0);			/* 27  Count of data  in this buffer */	pl32(p, 0);			/* 31  Offset to data in this buffer */	p8(p, 1);			/* 35  Count of setup words */	pl16(p, cmd);			/* 37  setup[0] */	pl16(p, 0);			/* padding ??!?!? */	pbytes(p);	return p;} static voidptntparam(Pkt *p){	uchar *pos = p->pos;	assert(p->tbase != 0); 	p->pos = p->tbase +23;	pl32(p, (pos - p->buf) - NBHDRLEN); /* param offset */ 	p->tparam = p->pos = pos;} static voidptntdata(Pkt *p){	uchar *pos = p->pos;	assert(p->tbase != 0);	assert(p->tparam != 0); 	p->pos = p->tbase +3;	pl32(p, pos - p->tparam);		/* total param count */ 	p->pos = p->tbase +19;	pl32(p, pos - p->tparam);		/* param count */ 	p->pos = p->tbase +31;	pl32(p, (pos - p->buf) - NBHDRLEN);	/* data offset */	p->tdata = p->pos = pos;} static inttntrpc(Pkt *p){	int got;	uchar *pos;	assert(p->tbase != 0);	assert(p->tdata != 0); 	pos = p->pos; 	p->pos = p->tbase +7;	pl32(p, pos - p->tdata);		/* total data count */ 	p->pos = p->tbase +27;	pl32(p, pos - p->tdata);		/* data count */ 	p->pos = pos;	if((got = cifsrpc(p)) == -1)		return -1; 	g8(p);				/* Reserved */	g8(p);				/* Reserved */	g8(p);				/* Reserved */	gl32(p);			/* Total parameter count */	gl32(p);			/* Total data count */	gl32(p);			/* Parameter count in this buffer */	p->tparam = p->buf +NBHDRLEN +gl32(p); /* Parameter offset */	gl32(p);			/* Parameter displacement */	gl32(p);			/* Data count (this buffer); */	p->tdata = p->buf +NBHDRLEN +gl32(p); /* Data offset */	gl32(p);			/* Data displacement */	g8(p);				/* Setup count */ 	gl16(p);			/* padding ???  */ 	return got;} static voidgtntparam(Pkt *p){	p->pos = p->tparam;} static voidgtntdata(Pkt *p){	p->pos = p->tdata;}  intTNTquerysecurity(Session *s, Share *sp, int fh, char **usid, char **gsid){	Pkt *p;	uchar *base;	Fmt fmt, *f = &fmt;	int n, i, off2owner, off2group; 	p = tnthdr(s, sp, NT_TRANSACT_QUERY_SECURITY_DESC);	ptntparam(p); 	pl16(p, fh); 		/* File handle */	pl16(p, 0); 		/* Reserved */	pl32(p, QUERY_OWNER_SECURITY_INFORMATION |		QUERY_GROUP_SECURITY_INFORMATION); 	ptntdata(p); 	if(tntrpc(p) == -1){		free(p);		return -1;	} 	gtntdata(p); 	base = p->pos;	gl16(p);			/* revision */	gl16(p);			/* type */	off2owner = gl32(p);		/* offset to owner */	off2group = gl32(p);		/* offset to group */	gl32(p);	gl32(p); 	if(off2owner){		p->pos = base +  off2owner;		fmtstrinit(f);		fmtprint(f, "S-%ud", g8(p));	/* revision */		n = g8(p);			/* num auth */		fmtprint(f, "-%llud", gb48(p));	/* authority */		for(i = 0; i < n; i++)			fmtprint(f, "-%ud", gl32(p));	/* sub-authorities */		*usid = fmtstrflush(f);	} 	if(off2group){		p->pos = base +  off2group;		fmtstrinit(f);		fmtprint(f, "S-%ud", g8(p));	/* revision */		n = g8(p);			/* num auth */		fmtprint(f, "-%llud", gb48(p));	/* authority */		for(i = 0; i < n; i++)			fmtprint(f, "-%ud", gl32(p));	/* sub-authorities */		*gsid = fmtstrflush(f);	}	free(p);	return 0;}