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#include "headers.h"
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static int
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getlock(SmbBuffer *b, int large, ushort *pidp, uvlong *offsetp, uvlong *lengthp)
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{
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ulong ohigh, olow;
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ulong lhigh, llow;
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if (!smbbuffergets(b, pidp))
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return 0;
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if (large && !smbbuffergetbytes(b, nil, 2))
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return 0;
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if (large) {
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if (!smbbuffergetl(b, &ohigh) || !smbbuffergetl(b, &olow)
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|| !smbbuffergetl(b, &lhigh) || !smbbuffergetl(b, &llow))
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return 0;
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*offsetp = ((uvlong)ohigh << 32) | olow;
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*lengthp = ((uvlong)lhigh << 32) | llow;
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return 1;
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}
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if (!smbbuffergetl(b, &olow) || !smbbuffergetl(b, &llow))
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return 0;
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*offsetp = olow;
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*lengthp = llow;
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return 1;
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}
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SmbProcessResult
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smbcomlockingandx(SmbSession *s, SmbHeader *h, uchar *pdata, SmbBuffer *b)
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{
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uchar andxcommand;
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ushort andxoffset;
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ulong andxoffsetfixup;
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ushort fid;
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uchar locktype;
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uchar oplocklevel;
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ulong timeout;
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ushort numberofunlocks;
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ushort numberoflocks;
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SmbTree *t;
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SmbFile *f;
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int l;
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SmbProcessResult pr;
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ulong backupoffset;
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int large;
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if (!smbcheckwordcount("comlockingandx", h, 8))
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return SmbProcessResultFormat;
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andxcommand = *pdata++;
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pdata++;
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andxoffset = smbnhgets(pdata); pdata += 2;
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fid = smbnhgets(pdata); pdata += 2;
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locktype = *pdata++;
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oplocklevel = *pdata++;
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timeout = smbnhgetl(pdata); pdata += 4;
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numberofunlocks = smbnhgets(pdata); pdata += 2;
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numberoflocks = smbnhgets(pdata);
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smblogprint(h->command, "smbcomlockingandx: fid 0x%.4ux locktype 0x%.2ux oplocklevel 0x%.2ux timeout %lud numberofunlocks %d numberoflocks %ud\n",
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fid, locktype, oplocklevel, timeout, numberofunlocks, numberoflocks);
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large = locktype & 0x10;
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locktype &= ~0x10;
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if (locktype != 0 || oplocklevel != 0) {
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smblogprint(-1, "smbcomlockingandx: locktype 0x%.2ux unimplemented\n", locktype);
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return SmbProcessResultUnimp;
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}
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if (oplocklevel != 0) {
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smblogprint(-1, "smbcomlockingandx: oplocklevel 0x%.2ux unimplemented\n", oplocklevel);
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return SmbProcessResultUnimp;
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}
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t = smbidmapfind(s->tidmap, h->tid);
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if (t == nil) {
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smbseterror(s, ERRSRV, ERRinvtid);
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error:
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return SmbProcessResultError;
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}
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f = smbidmapfind(s->fidmap, fid);
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if (f == nil) {
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smbseterror(s, ERRDOS, ERRbadfid);
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goto error;
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}
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backupoffset = smbbufferreadoffset(b);
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for (l = 0; l < numberofunlocks; l++) {
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ushort pid;
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uvlong offset;
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uvlong length;
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if (!getlock(b, large, &pid, &offset, &length)) {
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pr = SmbProcessResultFormat;
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goto done;
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}
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smblogprint(h->command, "smbcomlockingandx: unlock pid 0x%.4ux offset %llud length %llud\n",
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pid, offset, length);
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smbsharedfileunlock(f->sf, s, h->pid, offset, offset + length);
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}
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for (l = 0; l < numberoflocks; l++) {
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ushort pid;
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uvlong offset;
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uvlong length;
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if (!getlock(b, large, &pid, &offset, &length)) {
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pr = SmbProcessResultFormat;
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goto done;
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}
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smblogprint(h->command, "smbcomlockingandx: lock pid 0x%.4ux offset %llud length %llud\n",
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pid, offset, length);
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if (!smbsharedfilelock(f->sf, s, h->pid, offset, offset + length))
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break;
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}
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if (l < numberoflocks) {
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ushort i;
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ushort pid;
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uvlong offset;
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uvlong length;
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smbbufferreadbackup(b, backupoffset);
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for (i = 0; i < l; i++) {
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assert(getlock(b, large, &pid, &offset, &length));
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smbsharedfileunlock(f->sf, s, h->pid, offset, offset + length);
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}
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smbseterror(s, ERRDOS, ERRlock);
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goto error;
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}
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h->wordcount = 2;
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if (!smbbufferputandxheader(s->response, h, &s->peerinfo, andxcommand, &andxoffsetfixup)
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|| !smbbufferputs(s->response, 0)) { // bytecount 0
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pr = SmbProcessResultMisc;
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goto done;
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}
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if (andxcommand != SMB_COM_NO_ANDX_COMMAND)
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pr = smbchaincommand(s, h, andxoffsetfixup, andxcommand, andxoffset, b);
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else
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pr = SmbProcessResultReply;
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done:
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return pr;
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}
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