/* * Copyright (c) 2000-2001 Boris Popov * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Boris Popov. * 4. Neither the name of the author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $Id: smb_smb.c,v 1.35.100.2 2005/06/02 00:55:39 lindak Exp $ */ /* * Copyright 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* * various SMB requests. Most of the routines merely packs data into mbufs. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Largest size to use with LARGE_READ/LARGE_WRITE. * Specs say up to 64k data bytes, but Windows traffic * uses 60k... no doubt for some good reason. * (Probably to keep 4k block alignment.) * XXX: Move to smb.h maybe? */ #define SMB_MAX_LARGE_RW_SIZE (60*1024) /* * Default timeout values, all in seconds. * Make these tunable (only via mdb for now). */ int smb_timo_notice = 15; int smb_timo_default = 30; /* was SMB_DEFRQTIMO */ int smb_timo_open = 45; int smb_timo_read = 45; int smb_timo_write = 60; /* was SMBWRTTIMO */ int smb_timo_append = 90; static int smb_smb_read(struct smb_share *ssp, uint16_t fid, uint32_t *lenp, uio_t *uiop, smb_cred_t *scred, int timo); static int smb_smb_write(struct smb_share *ssp, uint16_t fid, uint32_t *lenp, uio_t *uiop, smb_cred_t *scred, int timo); static int smb_smb_readx(struct smb_share *ssp, uint16_t fid, uint32_t *lenp, uio_t *uiop, smb_cred_t *scred, int timo); static int smb_smb_writex(struct smb_share *ssp, uint16_t fid, uint32_t *lenp, uio_t *uiop, smb_cred_t *scred, int timo); int smb_smb_treeconnect(struct smb_share *ssp, struct smb_cred *scred) { struct smb_vc *vcp; struct smb_rq *rqp = NULL; struct mbchain *mbp; struct mdchain *mdp; char *pbuf, *unc_name = NULL; int error, tlen, plen, unc_len; uint16_t bcnt, options; uint8_t wc; vcp = SSTOVC(ssp); /* * Make this a "VC-level" request, so it will have * rqp->sr_share == NULL, and smb_iod_sendrq() * will send it with TID = SMB_TID_UNKNOWN * * This also serves to bypass the wait for * share state changes, which this call is * trying to carry out. */ error = smb_rq_alloc(VCTOCP(vcp), SMB_COM_TREE_CONNECT_ANDX, scred, &rqp); if (error) return (error); /* * Build the UNC name, i.e. "//server/share" * but with backslashes of course. * size math: three slashes, one null. */ unc_len = 4 + strlen(vcp->vc_srvname) + strlen(ssp->ss_name); unc_name = kmem_alloc(unc_len, KM_SLEEP); (void) snprintf(unc_name, unc_len, "\\\\%s\\%s", vcp->vc_srvname, ssp->ss_name); /* * The password is now pre-computed in the * user-space helper process. */ plen = ssp->ss_pwlen; pbuf = ssp->ss_pass; /* * Build the request. */ mbp = &rqp->sr_rq; smb_rq_wstart(rqp); mb_put_uint8(mbp, 0xff); mb_put_uint8(mbp, 0); mb_put_uint16le(mbp, 0); mb_put_uint16le(mbp, 0); /* Flags */ mb_put_uint16le(mbp, plen); smb_rq_wend(rqp); smb_rq_bstart(rqp); /* Tree connect password, if any */ error = mb_put_mem(mbp, pbuf, plen, MB_MSYSTEM); if (error) goto out; /* UNC resource name */ error = smb_put_dstring(mbp, vcp, unc_name, SMB_CS_NONE); if (error) goto out; /* * Put the type string (always ASCII), * including the null. */ tlen = strlen(ssp->ss_type_req) + 1; error = mb_put_mem(mbp, ssp->ss_type_req, tlen, MB_MSYSTEM); if (error) goto out; smb_rq_bend(rqp); /* * Run the request. * * Using NOINTR_RECV because we don't want to risk * missing a successful tree connect response, * which would "leak" Tree IDs. */ rqp->sr_flags |= SMBR_NOINTR_RECV; error = smb_rq_simple(rqp); SMBSDEBUG("%d\n", error); if (error) goto out; /* * Parse the TCON response */ smb_rq_getreply(rqp, &mdp); md_get_uint8(mdp, &wc); if (wc != 3) { error = EBADRPC; goto out; } md_get_uint16le(mdp, NULL); /* AndX cmd */ md_get_uint16le(mdp, NULL); /* AndX off */ md_get_uint16le(mdp, &options); /* option bits (DFS, search) */ error = md_get_uint16le(mdp, &bcnt); /* byte count */ if (error) goto out; /* * Get the returned share type string, * i.e. "IPC" or whatever. Don't care * if we get an error reading the type. */ tlen = sizeof (ssp->ss_type_ret); bzero(ssp->ss_type_ret, tlen--); if (tlen > bcnt) tlen = bcnt; md_get_mem(mdp, ssp->ss_type_ret, tlen, MB_MSYSTEM); /* Success! */ SMB_SS_LOCK(ssp); ssp->ss_tid = rqp->sr_rptid; ssp->ss_vcgenid = vcp->vc_genid; ssp->ss_options = options; ssp->ss_flags |= SMBS_CONNECTED; SMB_SS_UNLOCK(ssp); out: if (unc_name) kmem_free(unc_name, unc_len); smb_rq_done(rqp); return (error); } int smb_smb_treedisconnect(struct smb_share *ssp, struct smb_cred *scred) { struct smb_vc *vcp; struct smb_rq *rqp; int error; if (ssp->ss_tid == SMB_TID_UNKNOWN) return (0); /* * Build this as a "VC-level" request, so it will * avoid testing the _GONE flag on the share, * which has already been set at this point. * Add the share pointer "by hand" below, so * smb_iod_sendrq will plug in the TID. */ vcp = SSTOVC(ssp); error = smb_rq_alloc(VCTOCP(vcp), SMB_COM_TREE_DISCONNECT, scred, &rqp); if (error) return (error); rqp->sr_share = ssp; /* by hand */ smb_rq_wstart(rqp); smb_rq_wend(rqp); smb_rq_bstart(rqp); smb_rq_bend(rqp); /* * Run this with a relatively short timeout. (5 sec.) * We don't really care about the result here, but we * do need to make sure we send this out, or we could * "leak" active tree IDs on interrupt or timeout. * The NOINTR_SEND flag makes this request immune to * interrupt or timeout until the send is done. * Also, don't reconnect for this, of course! */ rqp->sr_flags |= (SMBR_NOINTR_SEND | SMBR_NORECONNECT); error = smb_rq_simple_timed(rqp, 5); SMBSDEBUG("%d\n", error); smb_rq_done(rqp); ssp->ss_tid = SMB_TID_UNKNOWN; return (error); } /* * Common function for read/write with UIO. * Called by netsmb smb_usr_rw, * smbfs_readvnode, smbfs_writevnode */ int smb_rwuio(struct smb_share *ssp, uint16_t fid, uio_rw_t rw, uio_t *uiop, smb_cred_t *scred, int timo) { struct smb_vc *vcp = SSTOVC(ssp); ssize_t save_resid; uint32_t len, rlen, maxlen; int error = 0; int (*iofun)(struct smb_share *, uint16_t, uint32_t *, uio_t *, smb_cred_t *, int); /* * Determine which function to use, * and the transfer size per call. */ if (SMB_DIALECT(vcp) >= SMB_DIALECT_NTLM0_12) { /* * Using NT LM 0.12, so readx, writex. * Make sure we can represent the offset. */ if ((vcp->vc_sopt.sv_caps & SMB_CAP_LARGE_FILES) == 0 && (uiop->uio_loffset + uiop->uio_resid) > UINT32_MAX) return (EFBIG); if (rw == UIO_READ) { iofun = smb_smb_readx; if (vcp->vc_sopt.sv_caps & SMB_CAP_LARGE_READX) maxlen = SMB_MAX_LARGE_RW_SIZE; else maxlen = vcp->vc_rxmax; } else { /* UIO_WRITE */ iofun = smb_smb_writex; if (vcp->vc_sopt.sv_caps & SMB_CAP_LARGE_WRITEX) maxlen = SMB_MAX_LARGE_RW_SIZE; else maxlen = vcp->vc_wxmax; } } else { /* * Using the old SMB_READ and SMB_WRITE so * we're limited to 32-bit offsets, etc. * XXX: Someday, punt the old dialects. */ if ((uiop->uio_loffset + uiop->uio_resid) > UINT32_MAX) return (EFBIG); if (rw == UIO_READ) { iofun = smb_smb_read; maxlen = vcp->vc_rxmax; } else { /* UIO_WRITE */ iofun = smb_smb_write; maxlen = vcp->vc_wxmax; } } save_resid = uiop->uio_resid; while (uiop->uio_resid > 0) { /* Lint: uio_resid may be 64-bits */ rlen = len = (uint32_t)min(maxlen, uiop->uio_resid); error = (*iofun)(ssp, fid, &rlen, uiop, scred, timo); /* * Note: the iofun called uio_update, so * not doing that here as one might expect. * * Quit the loop either on error, or if we * transferred less then requested. */ if (error || (rlen < len)) break; timo = 0; /* only first I/O should wait */ } if (error && (save_resid != uiop->uio_resid)) { /* * Stopped on an error after having * successfully transferred data. * Suppress this error. */ SMBSDEBUG("error %d suppressed\n", error); error = 0; } return (error); } static int smb_smb_readx(struct smb_share *ssp, uint16_t fid, uint32_t *lenp, uio_t *uiop, smb_cred_t *scred, int timo) { struct smb_rq *rqp; struct mbchain *mbp; struct mdchain *mdp; int error; uint32_t offlo, offhi, rlen; uint16_t lenhi, lenlo, off, doff; uint8_t wc; lenhi = (uint16_t)(*lenp >> 16); lenlo = (uint16_t)*lenp; offhi = (uint32_t)(uiop->uio_loffset >> 32); offlo = (uint32_t)uiop->uio_loffset; error = smb_rq_alloc(SSTOCP(ssp), SMB_COM_READ_ANDX, scred, &rqp); if (error) return (error); smb_rq_getrequest(rqp, &mbp); smb_rq_wstart(rqp); mb_put_uint8(mbp, 0xff); /* no secondary command */ mb_put_uint8(mbp, 0); /* MBZ */ mb_put_uint16le(mbp, 0); /* offset to secondary */ mb_put_uint16le(mbp, fid); mb_put_uint32le(mbp, offlo); /* offset (low part) */ mb_put_uint16le(mbp, lenlo); /* MaxCount */ mb_put_uint16le(mbp, 1); /* MinCount */ /* (only indicates blocking) */ mb_put_uint32le(mbp, lenhi); /* MaxCountHigh */ mb_put_uint16le(mbp, lenlo); /* Remaining ("obsolete") */ mb_put_uint32le(mbp, offhi); /* offset (high part) */ smb_rq_wend(rqp); smb_rq_bstart(rqp); smb_rq_bend(rqp); if (timo == 0) timo = smb_timo_read; error = smb_rq_simple_timed(rqp, timo); if (error) goto out; smb_rq_getreply(rqp, &mdp); error = md_get_uint8(mdp, &wc); if (error) goto out; if (wc != 12) { error = EBADRPC; goto out; } md_get_uint8(mdp, NULL); md_get_uint8(mdp, NULL); md_get_uint16le(mdp, NULL); md_get_uint16le(mdp, NULL); md_get_uint16le(mdp, NULL); /* data compaction mode */ md_get_uint16le(mdp, NULL); md_get_uint16le(mdp, &lenlo); /* data len ret. */ md_get_uint16le(mdp, &doff); /* data offset */ md_get_uint16le(mdp, &lenhi); rlen = (lenhi << 16) | lenlo; md_get_mem(mdp, NULL, 4 * 2, MB_MSYSTEM); error = md_get_uint16le(mdp, NULL); /* ByteCount */ if (error) goto out; /* * Does the data offset indicate padding? * The current offset is a constant, found * by counting the md_get_ calls above. */ off = SMB_HDRLEN + 3 + (12 * 2); /* =59 */ if (doff > off) /* pad byte(s)? */ md_get_mem(mdp, NULL, doff - off, MB_MSYSTEM); if (rlen == 0) { *lenp = rlen; goto out; } /* paranoid */ if (rlen > *lenp) { SMBSDEBUG("bad server! rlen %d, len %d\n", rlen, *lenp); rlen = *lenp; } error = md_get_uio(mdp, uiop, rlen); if (error) goto out; /* Success */ *lenp = rlen; out: smb_rq_done(rqp); return (error); } static int smb_smb_writex(struct smb_share *ssp, uint16_t fid, uint32_t *lenp, uio_t *uiop, smb_cred_t *scred, int timo) { struct smb_rq *rqp; struct mbchain *mbp; struct mdchain *mdp; int error; uint32_t offlo, offhi, rlen; uint16_t lenhi, lenlo; uint8_t wc; lenhi = (uint16_t)(*lenp >> 16); lenlo = (uint16_t)*lenp; offhi = (uint32_t)(uiop->uio_loffset >> 32); offlo = (uint32_t)uiop->uio_loffset; error = smb_rq_alloc(SSTOCP(ssp), SMB_COM_WRITE_ANDX, scred, &rqp); if (error) return (error); smb_rq_getrequest(rqp, &mbp); smb_rq_wstart(rqp); mb_put_uint8(mbp, 0xff); /* no secondary command */ mb_put_uint8(mbp, 0); /* MBZ */ mb_put_uint16le(mbp, 0); /* offset to secondary */ mb_put_uint16le(mbp, fid); mb_put_uint32le(mbp, offlo); /* offset (low part) */ mb_put_uint32le(mbp, 0); /* MBZ (timeout) */ mb_put_uint16le(mbp, 0); /* !write-thru */ mb_put_uint16le(mbp, 0); mb_put_uint16le(mbp, lenhi); mb_put_uint16le(mbp, lenlo); mb_put_uint16le(mbp, 64); /* data offset from header start */ mb_put_uint32le(mbp, offhi); /* offset (high part) */ smb_rq_wend(rqp); smb_rq_bstart(rqp); mb_put_uint8(mbp, 0); /* pad byte */ error = mb_put_uio(mbp, uiop, *lenp); if (error) goto out; smb_rq_bend(rqp); if (timo == 0) timo = smb_timo_write; error = smb_rq_simple_timed(rqp, timo); if (error) goto out; smb_rq_getreply(rqp, &mdp); error = md_get_uint8(mdp, &wc); if (error) goto out; if (wc != 6) { error = EBADRPC; goto out; } md_get_uint8(mdp, NULL); /* andx cmd */ md_get_uint8(mdp, NULL); /* reserved */ md_get_uint16le(mdp, NULL); /* andx offset */ md_get_uint16le(mdp, &lenlo); /* data len ret. */ md_get_uint16le(mdp, NULL); /* remaining */ error = md_get_uint16le(mdp, &lenhi); if (error) goto out; /* Success */ rlen = (lenhi << 16) | lenlo; *lenp = rlen; out: smb_rq_done(rqp); return (error); } static int smb_smb_read(struct smb_share *ssp, uint16_t fid, uint32_t *lenp, uio_t *uiop, smb_cred_t *scred, int timo) { struct smb_rq *rqp; struct mbchain *mbp; struct mdchain *mdp; int error; uint32_t off32; uint16_t bc, cnt, dlen, rcnt, todo; uint8_t wc; ASSERT(uiop->uio_loffset <= UINT32_MAX); off32 = (uint32_t)uiop->uio_loffset; ASSERT(*lenp <= UINT16_MAX); cnt = (uint16_t)*lenp; /* This next is an "estimate" of planned reads. */ todo = (uint16_t)min(uiop->uio_resid, UINT16_MAX); error = smb_rq_alloc(SSTOCP(ssp), SMB_COM_READ, scred, &rqp); if (error) return (error); smb_rq_getrequest(rqp, &mbp); smb_rq_wstart(rqp); mb_put_uint16le(mbp, fid); mb_put_uint16le(mbp, cnt); mb_put_uint32le(mbp, off32); mb_put_uint16le(mbp, todo); smb_rq_wend(rqp); smb_rq_bstart(rqp); smb_rq_bend(rqp); if (timo == 0) timo = smb_timo_read; error = smb_rq_simple_timed(rqp, timo); if (error) goto out; smb_rq_getreply(rqp, &mdp); error = md_get_uint8(mdp, &wc); if (error) goto out; if (wc != 5) { error = EBADRPC; goto out; } md_get_uint16le(mdp, &rcnt); /* ret. count */ md_get_mem(mdp, NULL, 4 * 2, MB_MSYSTEM); /* res. */ md_get_uint16le(mdp, &bc); /* byte count */ md_get_uint8(mdp, NULL); /* buffer format */ error = md_get_uint16le(mdp, &dlen); /* data len */ if (error) goto out; if (dlen < rcnt) { SMBSDEBUG("oops: dlen=%d rcnt=%d\n", (int)dlen, (int)rcnt); rcnt = dlen; } if (rcnt == 0) { *lenp = 0; goto out; } /* paranoid */ if (rcnt > cnt) { SMBSDEBUG("bad server! rcnt %d, cnt %d\n", (int)rcnt, (int)cnt); rcnt = cnt; } error = md_get_uio(mdp, uiop, (int)rcnt); if (error) goto out; /* success */ *lenp = (int)rcnt; out: smb_rq_done(rqp); return (error); } static int smb_smb_write(struct smb_share *ssp, uint16_t fid, uint32_t *lenp, uio_t *uiop, smb_cred_t *scred, int timo) { struct smb_rq *rqp; struct mbchain *mbp; struct mdchain *mdp; int error; uint32_t off32; uint16_t cnt, rcnt, todo; uint8_t wc; ASSERT(uiop->uio_loffset <= UINT32_MAX); off32 = (uint32_t)uiop->uio_loffset; ASSERT(*lenp <= UINT16_MAX); cnt = (uint16_t)*lenp; /* This next is an "estimate" of planned writes. */ todo = (uint16_t)min(uiop->uio_resid, UINT16_MAX); error = smb_rq_alloc(SSTOCP(ssp), SMB_COM_WRITE, scred, &rqp); if (error) return (error); smb_rq_getrequest(rqp, &mbp); smb_rq_wstart(rqp); mb_put_uint16le(mbp, fid); mb_put_uint16le(mbp, cnt); mb_put_uint32le(mbp, off32); mb_put_uint16le(mbp, todo); smb_rq_wend(rqp); smb_rq_bstart(rqp); mb_put_uint8(mbp, SMB_DT_DATA); mb_put_uint16le(mbp, cnt); error = mb_put_uio(mbp, uiop, *lenp); if (error) goto out; smb_rq_bend(rqp); if (timo == 0) timo = smb_timo_write; error = smb_rq_simple_timed(rqp, timo); if (error) goto out; smb_rq_getreply(rqp, &mdp); error = md_get_uint8(mdp, &wc); if (error) goto out; if (wc != 1) { error = EBADRPC; goto out; } error = md_get_uint16le(mdp, &rcnt); if (error) goto out; *lenp = rcnt; out: smb_rq_done(rqp); return (error); } static u_int32_t smbechoes = 0; int smb_smb_echo(struct smb_vc *vcp, struct smb_cred *scred, int timo) { struct smb_rq *rqp; struct mbchain *mbp; int error; error = smb_rq_alloc(VCTOCP(vcp), SMB_COM_ECHO, scred, &rqp); if (error) return (error); mbp = &rqp->sr_rq; smb_rq_wstart(rqp); mb_put_uint16le(mbp, 1); /* echo count */ smb_rq_wend(rqp); smb_rq_bstart(rqp); mb_put_uint32le(mbp, atomic_inc_32_nv(&smbechoes)); smb_rq_bend(rqp); /* * Note: the IOD calls this, so * this request must not wait for * connection state changes, etc. */ rqp->sr_flags |= SMBR_NORECONNECT; error = smb_rq_simple_timed(rqp, timo); SMBSDEBUG("%d\n", error); smb_rq_done(rqp); return (error); }