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NetBSD/sys/netsmb/smb_rq.c

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/* $NetBSD: smb_rq.c,v 1.2 2001/11/13 01:04:47 lukem Exp $ */
/*
* Copyright (c) 2000, 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: smb_rq.c,v 1.2 2001/11/13 01:04:47 lukem Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/lock.h>
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/mbuf.h>
#include <sys/subr_mbuf.h>
#include <sys/tree.h>
#include <netsmb/smb.h>
#include <netsmb/smb_conn.h>
#include <netsmb/smb_rq.h>
#include <netsmb/smb_subr.h>
#include <netsmb/smb_tran.h>
#ifndef NetBSD
MALLOC_DEFINE(M_SMBRQ, "SMBRQ", "SMB request");
#endif
static int smb_rq_recv(struct smb_rq *arqp);
static int smb_rq_send(struct smb_rq *rqp);
static int smb_rq_reply(struct smb_rq *rqp);
static int smb_rq_add(struct smb_rq *rqp);
static void smb_rq_remove(struct smb_rq *rqp);
static int smb_rq_rcvlock(struct smb_rq *rqp);
static int smb_rq_rcvunlock(struct smb_rq *rqp);
static int smb_rq_getenv(struct tnode *layer, struct smb_conn **scpp,
struct smb_vc **vcpp, struct smb_share **sspp);
static int smb_rq_new(struct smb_rq *rqp, u_char cmd);
static int smb_t2_reply(struct smb_t2rq *t2p);
int
smb_rq_alloc(struct tnode *layer, u_char cmd, struct smb_cred *scred,
struct smb_rq **rqpp)
{
struct smb_rq *rqp;
int error;
MALLOC(rqp, struct smb_rq *, sizeof(*rqp), M_SMBRQ, M_WAITOK);
if (rqp == NULL)
return ENOMEM;
error = smb_rq_init(rqp, layer, cmd, scred);
rqp->sr_flags |= SMBR_ALLOCED;
if (error) {
smb_rq_done(rqp);
return error;
}
*rqpp = rqp;
return 0;
}
static char tzero[12];
int
smb_rq_init(struct smb_rq *rqp, struct tnode *layer, u_char cmd,
struct smb_cred *scred)
{
int error;
bzero(rqp, sizeof(*rqp));
simple_lock_init(&rqp->sr_slock);
error = smb_rq_getenv(layer, &rqp->sr_conn, &rqp->sr_vc, &rqp->sr_share);
if (error)
return error;
error = smb_vc_access(rqp->sr_vc, scred, SMBM_EXEC);
if (error)
return error;
if (rqp->sr_share) {
error = smb_share_access(rqp->sr_share, scred, SMBM_EXEC);
if (error)
return error;
}
rqp->sr_cred = scred;
rqp->sr_mid = smb_vc_nextmid(rqp->sr_vc);
return smb_rq_new(rqp, cmd);
}
static int
smb_rq_new(struct smb_rq *rqp, u_char cmd)
{
struct smb_vc *vcp = rqp->sr_vc;
struct mbdata *mbp = &rqp->sr_rq;
int error;
mb_done(mbp);
mb_done(&rqp->sr_rp);
error = mb_init(mbp);
if (error)
return error;
mb_put_mem(mbp, SMB_SIGNATURE, SMB_SIGLEN, MB_MSYSTEM);
mb_put_byte(mbp, cmd);
mb_put_dwordle(mbp, 0); /* DosError */
mb_put_byte(mbp, vcp->vc_hflags);
mb_put_wordle(mbp, vcp->vc_hflags2);
mb_put_mem(mbp, tzero, 12, MB_MSYSTEM);
rqp->sr_rqtid = (u_int16_t*)mb_fit(mbp, sizeof(u_int16_t));
mb_put_wordle(mbp, 1 /*scred->sc_p->p_pid & 0xffff*/);
rqp->sr_rquid = (u_int16_t*)mb_fit(mbp, sizeof(u_int16_t));
mb_put_wordle(mbp, rqp->sr_mid);
return 0;
}
void
smb_rq_done(struct smb_rq *rqp)
{
mb_done(&rqp->sr_rq);
mb_done(&rqp->sr_rp);
if (rqp->sr_flags & SMBR_ALLOCED)
free(rqp, M_SMBRQ);
}
/*
* Simple request-reply exchange
*/
int
smb_rq_simple(struct smb_rq *rqp)
{
struct smb_conn *scp = rqp->sr_conn;
int error = EINVAL, i;
for (i = 0; i < SMB_MAXRCN; i++) {
rqp->sr_flags &= ~SMBR_RESTART;
rqp->sr_timo = scp->sc_timo;
error = smb_rq_add(rqp);
if (error)
return error;
error = smb_rq_send(rqp);
if (!error)
error = smb_rq_reply(rqp);
smb_rq_remove(rqp);
if (error == 0)
break;
if ((rqp->sr_flags & (SMBR_RESTART | SMBR_NORESTART)) != SMBR_RESTART)
break;
}
return error;
}
static int
smb_rq_add(struct smb_rq *rqp)
{
struct smb_vc *vcp = rqp->sr_vc;
struct proc *p = rqp->sr_cred->scr_p;
int error;
SMBSDEBUG("M:%d\n", rqp->sr_mid);
for (;;) {
error = smb_vc_rqlock(vcp, p);
if (error)
return error;
/*
* if connection is marked as invalid and we're the only request,
* try to restore it. Otherwise we have to wait.
*/
if ((vcp->vc_flags & (SMBV_INVALID | SMBV_RECONNECTING)) == SMBV_INVALID) {
vcp->vc_flags |= SMBV_RECONNECTING;
vcp->vc_scred = rqp->sr_cred;
smb_vc_rqunlock(vcp, p);
SMBSDEBUG("reconnect\n");
error = smb_vc_reconnect(vcp);
vcp->vc_flags &= ~SMBV_RECONNECTING;
/*
* If we're still not connected, just bail out
*/
if (error)
return error;
continue;
}
if (vcp->vc_flags & SMBV_RECONNECTING) {
if (vcp->vc_scred == rqp->sr_cred)
break;
} else if (vcp->vc_maxmux == 0 ||
vcp->vc_muxcnt < vcp->vc_maxmux)
break;
SMBSDEBUG("sleep\n");
vcp->vc_muxwant++;
#ifndef NetBSD
asleep(&vcp->vc_muxwant, PWAIT, "smbmx", 0);
smb_vc_rqunlock(vcp, p);
await(PWAIT, 0);
#else
smb_vc_rqunlock(vcp, p);
tsleep(&vcp->vc_muxwant, PWAIT, "smbmx", 0);
#endif
}
vcp->vc_muxcnt++;
TAILQ_INSERT_TAIL(&vcp->vc_rqlist, rqp, sr_link);
smb_vc_rqunlock(vcp, p);
return 0;
}
static void
smb_rq_remove(struct smb_rq *rqp)
{
struct smb_vc *vcp = rqp->sr_vc;
struct proc *p = rqp->sr_cred->scr_p;
SMBSDEBUG("M:%d\n", rqp->sr_mid);
if (smb_vc_rqlock(vcp, p) != 0) {
SMBERROR("can't lock connection");
return;
}
TAILQ_REMOVE(&vcp->vc_rqlist, rqp, sr_link);
vcp->vc_muxcnt--;
if (vcp->vc_muxwant) {
vcp->vc_muxwant--;
wakeup(&vcp->vc_muxwant);
}
smb_vc_rqunlock(vcp, p);
}
void
smb_rq_wstart(struct smb_rq *rqp)
{
rqp->sr_wcount = mb_fit(&rqp->sr_rq, sizeof(u_int8_t));
rqp->sr_rq.mb_count = 0;
}
void
smb_rq_wend(struct smb_rq *rqp)
{
if (rqp->sr_wcount == NULL) {
SMBERROR("no wcount\n"); /* actually panic */
return;
}
if (rqp->sr_rq.mb_count & 1)
SMBERROR("odd word count\n");
*rqp->sr_wcount = rqp->sr_rq.mb_count / 2;
}
void
smb_rq_bstart(struct smb_rq *rqp)
{
rqp->sr_bcount = (u_short*)mb_fit(&rqp->sr_rq, sizeof(u_short));
rqp->sr_rq.mb_count = 0;
}
void
smb_rq_bend(struct smb_rq *rqp)
{
int bcnt;
if (rqp->sr_bcount == NULL) {
SMBERROR("no bcount\n"); /* actually panic */
return;
}
bcnt = rqp->sr_rq.mb_count;
if (bcnt > 0xffff)
SMBERROR("byte count too large (%d)\n", bcnt);
*rqp->sr_bcount = bcnt;
}
int
smb_rq_intr(struct smb_rq *rqp)
{
struct proc *p = rqp->sr_cred->scr_p;
if (rqp->sr_flags & SMBR_INTR)
return EINTR;
return smb_proc_intr(p);
}
int
smb_tran_sndlock(struct smb_rq *rqp)
{
u_int *statep = &rqp->sr_vc->vc_locks;
int slpflag = 0, slptimeo = 0;
slpflag = PCATCH;
if (rqp->sr_flags & SMBR_RESTART)
return EINTR;
while (*statep & SMBV_SNDLOCK) {
if (smb_rq_intr(rqp))
return EINTR;
if (rqp->sr_flags & SMBR_RESTART)
return EINTR;
*statep |= SMBV_SNDWANT;
(void)tsleep((caddr_t)statep, slpflag | (PZERO - 1),
"smbslck", slptimeo);
if (slpflag == PCATCH) {
slpflag = 0;
slptimeo = 2 * hz;
}
}
*statep |= SMBV_SNDLOCK;
return 0;
}
int
smb_tran_sndunlock(struct smb_rq *rqp)
{
u_int *statep = &rqp->sr_vc->vc_locks;
if ((*statep & SMBV_SNDLOCK) == 0)
SMBPANIC("not locked\n");
*statep &= ~SMBV_SNDLOCK;
if (*statep & SMBV_SNDWANT) {
*statep &= ~SMBV_SNDWANT;
wakeup((caddr_t)statep);
}
return 0;
}
static void
smb_printrqlist(struct smb_vc *vcp)
{
#if 0
struct smb_rq *rqp;
TAILQ_FOREACH(rqp, &scp->sc_rqlist, sr_link) {
printf("RQ: MID=%d, GOTRESPONCE=%s\n", (u_int)rqp->sr_mid,
rqp->sr_rp.mb_top ? "yes" : "no");
}
#endif
}
static int
smb_rq_rcvlock(struct smb_rq *rqp)
{
u_int *statep = &rqp->sr_vc->vc_locks;
int slpflag, slptimeo = 0;
if (rqp->sr_rp.mb_top)
return EALREADY;
if (rqp->sr_flags & SMBR_RESTART)
return EINTR;
slpflag = PCATCH;
while (*statep & SMBV_RCVLOCK) {
if (smb_rq_intr(rqp))
return EINTR;
*statep |= SMBV_RCVWANT;
(void)tsleep((caddr_t)statep, slpflag | (PZERO - 1), "smbrlck",
slptimeo);
if (rqp->sr_rp.mb_top)
return EALREADY;
if (rqp->sr_flags & SMBR_RESTART)
return EINTR;
if (slpflag == PCATCH) {
slpflag = 0;
slptimeo = 2 * hz;
}
/*
printf("sleep: MID=%d, MUX=%d, NEXTMID=%d\n", (u_int)rqp->sr_mid,
rqp->sr_conn->sc_muxcnt, (u_int)rqp->sr_conn->sc_mid);
smb_printrqlist(rqp->sr_conn);
*/
}
*statep |= SMBV_RCVLOCK;
return 0;
}
static int
smb_rq_rcvunlock(struct smb_rq *rqp)
{
u_int *statep = &rqp->sr_vc->vc_locks;
if ((*statep & SMBV_RCVLOCK) == 0)
SMBPANIC("not locked");
*statep &= ~SMBV_RCVLOCK;
if (*statep & SMBV_RCVWANT) {
*statep &= ~SMBV_RCVWANT;
wakeup((caddr_t)statep);
}
return 0;
}
int
smb_rq_getrequest(struct smb_rq *rqp, struct mbdata **mbpp)
{
*mbpp = &rqp->sr_rq;
return 0;
}
int
smb_rq_getreply(struct smb_rq *rqp, struct mbdata **mbpp)
{
*mbpp = &rqp->sr_rp;
return 0;
}
static int
smb_rq_getenv(struct tnode *layer, struct smb_conn **scpp,
struct smb_vc **vcpp, struct smb_share **sspp)
{
struct smb_conn *scp = NULL;
struct smb_vc *vcp = NULL;
struct smb_share *ssp = NULL;
struct tnode *tp;
int error = 0;
switch (TTYPE(layer)) {
case TSMB_CONN:
scp = TNTOCN(layer);
break;
case TSMB_VC:
vcp = TNTOVC(layer);
tp = layer->t_parent;
if (tp == NULL) {
SMBERROR("zombie VC %s\n", layer->t_name);
error = EINVAL;
break;
}
scp = TNTOCN(tp);
break;
case TSMB_SHARE:
ssp = TNTOSS(layer);
tp = layer->t_parent;
if (tp == NULL) {
SMBERROR("zombie share %s\n", layer->t_name);
error = EINVAL;
break;
}
vcp = TNTOVC(tp);
tp = tp->t_parent;
if (tp == NULL) {
SMBERROR("zombie VC %s\n", layer->t_name);
error = EINVAL;
break;
}
scp = TNTOCN(tp);
break;
default:
SMBERROR("invalid layer %d passed\n", TTYPE(layer));
error = EINVAL;
}
if (scpp)
*scpp = scp;
if (vcpp)
*vcpp = vcp;
if (sspp)
*sspp = ssp;
return error;
}
/*
* Wait for reply on the request
*/
static int
smb_rq_reply(struct smb_rq *rqp)
{
struct mbdata *mbp = &rqp->sr_rp;
u_int32_t tdw;
u_int8_t tb;
int error, rperror = 0;
error = smb_rq_recv(rqp);
if (error)
return error;
error = mb_get_dword(mbp, &tdw);
error = mb_get_byte(mbp, &tb);
if (rqp->sr_vc->vc_hflags2 & SMB_FLAGS2_ERR_STATUS) {
error = mb_get_dwordle(mbp, &rqp->sr_error);
} else {
error = mb_get_byte(mbp, &rqp->sr_errclass);
error = mb_get_byte(mbp, &tb);
error = mb_get_wordle(mbp, &rqp->sr_serror);
if (!error)
rperror = smb_maperror(rqp->sr_errclass, rqp->sr_serror);
}
error = mb_get_byte(mbp, &rqp->sr_rpflags);
error = mb_get_wordle(mbp, &rqp->sr_rpflags2);
error = mb_get_dword(mbp, &tdw);
error = mb_get_dword(mbp, &tdw);
error = mb_get_dword(mbp, &tdw);
error = mb_get_wordle(mbp, &rqp->sr_rptid);
error = mb_get_wordle(mbp, &rqp->sr_rppid);
error = mb_get_wordle(mbp, &rqp->sr_rpuid);
error = mb_get_wordle(mbp, &rqp->sr_rpmid);
SMBSDEBUG("M:%04x, P:%04x, U:%04x, T:%04x, E: %d:%d\n",
rqp->sr_rpmid, rqp->sr_rppid, rqp->sr_rpuid, rqp->sr_rptid,
rqp->sr_errclass, rqp->sr_serror);
return error ? error : rperror;
}
/*
* Check for fatal errors
*/
static __inline int
smb_rq_fatal(int error)
{
switch (error) {
case ENOTCONN:
case ENETRESET:
case ECONNABORTED:
return 1;
}
return 0;
}
static int
smb_rq_recv(struct smb_rq *arqp)
{
struct smb_vc *vcp = arqp->sr_vc;
struct proc *p = arqp->sr_cred->scr_p;
struct smb_rq *rqp;
struct mbdata *mbp, mb;
struct mbuf *m;
u_char *hp;
u_short mid;
int error;
#define rcverr(err) do { error = err; goto exit; }while(0)
mbp = &mb;
for (;;) {
simple_lock(&arqp->sr_slock);
error = mb_fetch_record(&arqp->sr_rp);
simple_unlock(&arqp->sr_slock);
if (!error)
return 0;
bzero(mbp, sizeof(struct mbdata));
error = smb_rq_rcvlock(arqp);
if (error == EALREADY)
return 0;
if (error)
return error;
do {
error = SMB_TRAN_RECV(vcp, &m, p);
if (error == EWOULDBLOCK && (arqp->sr_flags & SMBR_INTR)) {
error = EINTR;
break;
}
} while (error == EWOULDBLOCK);
if (smb_rq_fatal(error)) {
smb_vc_invalidate(vcp);
goto unlock;
}
if (error)
goto unlock;
if (m == NULL) {
SMBERROR("tran return a NULL without error\n");
error = EPIPE;
goto unlock;
}
m = m_pullup(m, SMB_HDRLEN);
if (m == NULL) {
smb_rq_rcvunlock(arqp);
continue; /* wait for a good packet */
}
mb_initm(mbp, m);
/*
* Now we got an entire and possibly invalid SMB packet.
* Be careful while parsing it.
*/
m_dumpm(mbp->mb_top);
hp = mtod(mbp->mb_top, u_char*);
if (bcmp(hp, SMB_SIGNATURE, SMB_SIGLEN) != 0)
rcverr(EBADRPC);
mid = SMB_HDRMID(hp);
SMBSDEBUG("mid %04x\n", (u_int)mid);
smb_vc_rqlock(vcp, p);
TAILQ_FOREACH(rqp, &vcp->vc_rqlist, sr_link) {
if (rqp->sr_mid != mid)
continue;
if (rqp->sr_rp.mb_top == NULL)
mb_initm(&rqp->sr_rp, m);
else {
simple_lock(&rqp->sr_slock);
mb_append_record(&rqp->sr_rp, m);
simple_unlock(&rqp->sr_slock);
}
if (rqp == arqp) {
smb_vc_rqunlock(vcp, p);
goto unlock;
}
break;
}
smb_vc_rqunlock(vcp, p);
if (rqp == NULL) {
SMBSDEBUG("drop resp with mid %d\n", (u_int)mid);
smb_printrqlist(vcp);
mb_done(mbp);
}
smb_rq_rcvunlock(arqp);
}
exit:
mb_done(mbp);
unlock:
smb_rq_rcvunlock(arqp);
return error;
}
static int
smb_rq_send(struct smb_rq *rqp)
{
struct proc *p = rqp->sr_cred->scr_p;
struct smb_vc *vcp = rqp->sr_vc;
struct smb_share *ssp = rqp->sr_share;
struct mbuf *m;
int error, rcnt, rmax;
rmax = 5; /* TODO: configurable */
*rqp->sr_rqtid = htoles(ssp ? ssp->ss_id : SMB_TID_UNKNOWN);
*rqp->sr_rquid = htoles(vcp ? vcp->vc_id : 0);
mb_fixhdr(&rqp->sr_rq);
rqp->sr_flags &= ~SMBR_SENT;
error = ENOTCONN;
for (rcnt = 0; rcnt < rmax; rcnt++) {
error = smb_tran_sndlock(rqp);
if (error)
return error;
if (vcp->vc_tdata == NULL) {
smb_tran_sndunlock(rqp);
return ENOTCONN;
}
SMBSDEBUG("M:%04x, P:%04x, U:%04x, T:%04x\n",
rqp->sr_mid, 0, 0, 0);
m_dumpm(rqp->sr_rq.mb_top);
m = m_copym(rqp->sr_rq.mb_top, 0, M_COPYALL, M_WAIT);
error = SMB_TRAN_SEND(vcp, m, p);
smb_tran_sndunlock(rqp);
if (error == 0) {
rqp->sr_flags |= SMBR_SENT;
return 0;
}
/*
* Check for fatal errors
*/
if (smb_rq_fatal(error)) {
smb_vc_invalidate(vcp);
return error;
}
/*
* These errors are not fatal and can be recovered later
*/
if (error == EINTR || error == ENETDOWN || error == EPIPE)
return error;
if (smb_rq_intr(rqp))
return EINTR;
rqp->sr_rexmit = 1;
tsleep(&rqp->sr_rexmit, PWAIT | PCATCH, "smbrxm", 5 * hz);
if (smb_rq_intr(rqp))
return EINTR;
}
return error;
}
#define ALIGN4(a) (((a) + 3) & ~3)
/*
* TRANS2 request implementation
*/
int
smb_t2_alloc(struct tnode *layer, u_short setup, struct smb_cred *scred,
struct smb_t2rq **t2pp)
{
struct smb_t2rq *t2p;
int error;
MALLOC(t2p, struct smb_t2rq *, sizeof(*t2p), M_SMBRQ, M_WAITOK);
if (t2p == NULL)
return ENOMEM;
error = smb_t2_init(t2p, layer, setup, scred);
t2p->t2_flags |= SMBT2_ALLOCED;
if (error) {
smb_t2_done(t2p);
return error;
}
*t2pp = t2p;
return 0;
}
int
smb_t2_init(struct smb_t2rq *t2p, struct tnode *source, u_short setup,
struct smb_cred *scred)
{
int error;
bzero(t2p, sizeof(*t2p));
t2p->t2_source = source;
t2p->t2_setupcount = 1;
t2p->t2_setupdata = t2p->t2_setup;
t2p->t2_setup[0] = setup;
t2p->t2_fid = 0xffff;
t2p->t2_cred = scred;
error = smb_rq_getenv(source, &t2p->t2_conn,&t2p->t2_vc, NULL);
if (error)
return error;
return 0;
}
void
smb_t2_done(struct smb_t2rq *t2p)
{
mb_done(&t2p->t2_tparam);
mb_done(&t2p->t2_tdata);
mb_done(&t2p->t2_rparam);
mb_done(&t2p->t2_rdata);
if (t2p->t2_flags & SMBT2_ALLOCED)
free(t2p, M_SMBRQ);
}
static int
smb_t2_reply(struct smb_t2rq *t2p)
{
struct mbuf *m, *m0;
struct mbdata *mbp;
struct smb_rq *rqp = t2p->t2_rq;
int error, totpgot, totdgot, len;
u_int16_t totpcount, totdcount, pcount, poff, doff, pdisp, ddisp;
u_int16_t tmp, bc, dcount;
u_int8_t wc;
error = smb_rq_reply(rqp);
if (error)
return error;
if ((t2p->t2_flags & SMBT2_ALLSENT) == 0) {
/*
* this is an interim response, ignore it.
*/
mb_done(&rqp->sr_rp);
return 0;
}
/*
* Now we have to get all subseqent responses. The CIFS specification
* says that they can be misordered which is weird.
* TODO: timo
*/
totpgot = totdgot = 0;
totpcount = totdcount = 0xffff;
if (mb_init(&t2p->t2_rparam) != 0 || mb_init(&t2p->t2_rdata) != 0)
return ENOBUFS;
mbp = &rqp->sr_rp;
for (;;) {
m_dumpm(mbp->mb_top);
mb_get_byte(mbp, &wc);
mb_get_wordle(mbp, &tmp);
if (totpcount > tmp)
totpcount = tmp;
mb_get_wordle(mbp, &tmp);
if (totdcount > tmp)
totdcount = tmp;
mb_get_wordle(mbp, &tmp); /* reserved */
mb_get_wordle(mbp, &pcount);
mb_get_wordle(mbp, &poff);
mb_get_wordle(mbp, &pdisp);
if (pcount != 0 && pdisp != totpgot) {
SMBERROR("Can't handle misordered parameters %d:%d\n",
pdisp, totpgot);
error = EINVAL;
break;
}
mb_get_wordle(mbp, &dcount);
mb_get_wordle(mbp, &doff);
mb_get_wordle(mbp, &ddisp);
if (dcount != 0 && ddisp != totdgot) {
SMBERROR("Can't handle misordered data\n");
error = EINVAL;
break;
}
mb_get_byte(mbp, &wc);
mb_get_byte(mbp, NULL);
tmp = wc;
while (tmp--)
mb_get_word(mbp, NULL);
mb_get_wordle(mbp, &bc);
/* tmp = SMB_HDRLEN + 1 + 10 * 2 + 2 * wc + 2;*/
error = EBADRPC;
if (dcount) {
m0 = m_split(mbp->mb_top, doff, M_WAIT);
if (m0 == NULL)
break;
for(len = 0, m = m0; m->m_next; m = m->m_next)
len += m->m_len;
len += m->m_len;
m->m_len -= len - dcount;
m_cat(t2p->t2_rdata.mb_top, m0);
}
if (pcount) {
m0 = m_split(mbp->mb_top, poff, M_WAIT);
if (m0 == NULL)
break;
for(len = 0, m = m0; m->m_next; m = m->m_next)
len += m->m_len;
len += m->m_len;
m->m_len -= len - pcount;
m_cat(t2p->t2_rparam.mb_top, m0);
}
totpgot += pcount;
totdgot += dcount;
if (totpgot >= totpcount && totdgot >= totdcount) {
error = 0;
t2p->t2_flags |= SMBT2_ALLRECV;
break;
}
error = smb_rq_reply(rqp);
if (error)
break;
}
return error;
}
/*
* Perform a full round of TRANS2 request
*/
static int
smb_t2_request_int(struct smb_t2rq *t2p)
{
struct mbdata *mbp;
struct mbuf *m;
struct smb_rq rq, *rqp = &rq;
struct smb_vc *vcp = t2p->t2_vc;
struct smb_cred *scred = t2p->t2_cred;
int totpcount, leftpcount, totdcount, leftdcount, len, txmax, i;
int error, doff, poff, txdcount, txpcount, nmlen;
mbp = &t2p->t2_tparam;
if (mbp->mb_top) {
mb_initm(mbp, mbp->mb_top);
totpcount = mb_fixhdr(mbp);
if (totpcount > 0xffff) /* maxvalue for u_short */
return EINVAL;
} else
totpcount = 0;
mbp = &t2p->t2_tdata;
if (mbp->mb_top) {
mb_initm(mbp, mbp->mb_top);
totdcount = mb_fixhdr(mbp);
if (totdcount > 0xffff)
return EINVAL;
} else
totdcount = 0;
leftdcount = totdcount;
leftpcount = totpcount;
txmax = vcp->vc_txmax;
error = smb_rq_init(rqp, t2p->t2_source, t2p->t_name ?
SMB_COM_TRANSACTION : SMB_COM_TRANSACTION2, scred);
if (error)
return error;
t2p->t2_rq = rqp;
mbp = &rqp->sr_rq;
smb_rq_wstart(rqp);
mb_put_wordle(mbp, totpcount);
mb_put_wordle(mbp, totdcount);
mb_put_wordle(mbp, t2p->t2_maxpcount);
mb_put_wordle(mbp, t2p->t2_maxdcount);
mb_put_byte(mbp, t2p->t2_maxscount);
mb_put_byte(mbp, 0); /* reserved */
mb_put_wordle(mbp, 0); /* flags */
mb_put_dwordle(mbp, 0); /* Timeout */
mb_put_wordle(mbp, 0); /* reserved 2 */
len = mb_fixhdr(mbp);
/*
* now we have known packet size as
* ALIGN4(len + 5 * 2 + setupcount * 2 + 2 + strlen(name) + 1),
* and need to decide which parts should go into the first request
*/
nmlen = t2p->t_name ? strlen(t2p->t_name) : 0;
len = ALIGN4(len + 5 * 2 + t2p->t2_setupcount * 2 + 2 + nmlen + 1);
if (len + leftpcount > txmax) {
txpcount = min(leftpcount, txmax - len);
poff = len;
txdcount = 0;
doff = 0;
} else {
txpcount = leftpcount;
poff = txpcount ? len : 0;
len = ALIGN4(len + txpcount);
txdcount = min(leftdcount, txmax - len);
doff = txdcount ? len : 0;
}
leftpcount -= txpcount;
leftdcount -= txdcount;
mb_put_wordle(mbp, txpcount);
mb_put_wordle(mbp, poff);
mb_put_wordle(mbp, txdcount);
mb_put_wordle(mbp, doff);
mb_put_byte(mbp, t2p->t2_setupcount);
mb_put_byte(mbp, 0);
for (i = 0; i < t2p->t2_setupcount; i++)
mb_put_wordle(mbp, t2p->t2_setupdata[i]);
smb_rq_wend(rqp);
smb_rq_bstart(rqp);
/* TDUNICODE */
if (t2p->t_name)
mb_put_mem(mbp, t2p->t_name, nmlen, MB_MSYSTEM);
mb_put_byte(mbp, 0); /* terminating zero */
len = mb_fixhdr(mbp);
if (txpcount) {
mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
error = mb_get_mbuf(&t2p->t2_tparam, txpcount, &m);
SMBSDEBUG("%d:%d:%d\n", error, txpcount, txmax);
if (error)
goto freerq;
mb_put_mbuf(mbp, m);
}
len = mb_fixhdr(mbp);
if (txdcount) {
mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
error = mb_get_mbuf(&t2p->t2_tdata, txdcount, &m);
if (error)
goto freerq;
mb_put_mbuf(mbp, m);
}
smb_rq_bend(rqp); /* incredible, but thats it... */
error = smb_rq_add(rqp);
if (error)
goto freerq;
error = smb_rq_send(rqp);
if (error)
goto bad;
if (leftpcount == 0 && leftdcount == 0)
t2p->t2_flags |= SMBT2_ALLSENT;
error = smb_t2_reply(t2p);
if (error)
goto bad;
while (leftpcount || leftdcount) {
error = smb_rq_new(rqp, t2p->t_name ?
SMB_COM_TRANSACTION_SECONDARY : SMB_COM_TRANSACTION2_SECONDARY);
if (error)
goto bad;
mbp = &rqp->sr_rq;
smb_rq_wstart(rqp);
mb_put_wordle(mbp, totpcount);
mb_put_wordle(mbp, totdcount);
len = mb_fixhdr(mbp);
/*
* now we have known packet size as
* ALIGN4(len + 7 * 2 + 2) for T2 request, and -2 for T one,
* and need to decide which parts should go into request
*/
len = ALIGN4(len + 6 * 2 + 2);
if (t2p->t_name == NULL)
len += 2;
if (len + leftpcount > txmax) {
txpcount = min(leftpcount, txmax - len);
poff = len;
txdcount = 0;
doff = 0;
} else {
txpcount = leftpcount;
poff = txpcount ? len : 0;
len = ALIGN4(len + txpcount);
txdcount = min(leftdcount, txmax - len);
doff = txdcount ? len : 0;
}
mb_put_wordle(mbp, txpcount);
mb_put_wordle(mbp, poff);
mb_put_wordle(mbp, totpcount - leftpcount);
mb_put_wordle(mbp, txdcount);
mb_put_wordle(mbp, doff);
mb_put_wordle(mbp, totdcount - leftdcount);
leftpcount -= txpcount;
leftdcount -= txdcount;
if (t2p->t_name == NULL)
mb_put_wordle(mbp, t2p->t2_fid);
smb_rq_wend(rqp);
smb_rq_bstart(rqp);
mb_put_byte(mbp, 0); /* name */
len = mb_fixhdr(mbp);
if (txpcount) {
mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
error = mb_get_mbuf(&t2p->t2_tparam, txpcount, &m);
if (error)
goto bad;
mb_put_mbuf(mbp, m);
}
len = mb_fixhdr(mbp);
if (txdcount) {
mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
error = mb_get_mbuf(&t2p->t2_tdata, txdcount, &m);
if (error)
goto bad;
mb_put_mbuf(mbp, m);
}
smb_rq_bend(rqp);
error = smb_rq_send(rqp);
if (error)
goto bad;
} /* while left params or data */
t2p->t2_flags |= SMBT2_ALLSENT;
mbp = &t2p->t2_rdata;
if (mbp->mb_top) {
m_fixhdr(mbp->mb_top);
mb_initm(mbp, mbp->mb_top);
}
mbp = &t2p->t2_rparam;
if (mbp->mb_top) {
m_fixhdr(mbp->mb_top);
mb_initm(mbp, mbp->mb_top);
}
bad:
smb_rq_remove(rqp);
freerq:
if (error && (rqp->sr_flags & SMBR_RESTART))
t2p->t2_flags |= SMBT2_RESTART;
smb_rq_done(rqp);
return error;
}
int
smb_t2_request(struct smb_t2rq *t2p)
{
int error = EINVAL, i;
for (i = 0; i < SMB_MAXRCN; i++) {
t2p->t2_flags &= ~SMBR_RESTART;
error = smb_t2_request_int(t2p);
if (error == 0)
break;
if ((t2p->t2_flags & (SMBT2_RESTART | SMBT2_NORESTART)) != SMBT2_RESTART)
break;
}
return error;
}
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