smb_trantcp.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
    1 /*
    2  * Copyright (c) 2000-2001 Boris Popov
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *    This product includes software developed by Boris Popov.
   16  * 4. Neither the name of the author nor the names of any co-contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  * $FreeBSD: releng/5.1/sys/netsmb/smb_trantcp.c 111119 2003-02-19 05:47:46Z imp $
   33  */
   34 #include <sys/param.h>
   35 #include <sys/condvar.h>
   36 #include <sys/kernel.h>
   37 #include <sys/lock.h>
   38 #include <sys/malloc.h>
   39 #include <sys/mbuf.h>
   40 #include <sys/poll.h>
   41 #include <sys/proc.h>
   42 #include <sys/protosw.h>
   43 #include <sys/signalvar.h>
   44 #include <sys/socket.h>
   45 #include <sys/socketvar.h>
   46 #include <sys/sx.h>
   47 #include <sys/sysctl.h>
   48 #include <sys/systm.h>
   49 #include <sys/uio.h>
   50 
   51 #include <net/if.h>
   52 #include <net/route.h>
   53 
   54 #include <netinet/in.h>
   55 #include <netinet/tcp.h>
   56 
   57 #include <sys/mchain.h>
   58 
   59 #include <netsmb/netbios.h>
   60 
   61 #include <netsmb/smb.h>
   62 #include <netsmb/smb_conn.h>
   63 #include <netsmb/smb_tran.h>
   64 #include <netsmb/smb_trantcp.h>
   65 #include <netsmb/smb_subr.h>
   66 
   67 #define M_NBDATA        M_PCB
   68 
   69 static int smb_tcpsndbuf = NB_SNDQ - 1;
   70 static int smb_tcprcvbuf = NB_RCVQ - 1;
   71 
   72 SYSCTL_DECL(_net_smb);
   73 SYSCTL_INT(_net_smb, OID_AUTO, tcpsndbuf, CTLFLAG_RW, &smb_tcpsndbuf, 0, "");
   74 SYSCTL_INT(_net_smb, OID_AUTO, tcprcvbuf, CTLFLAG_RW, &smb_tcprcvbuf, 0, "");
   75 
   76 #define nb_sosend(so,m,flags,td) (so)->so_proto->pr_usrreqs->pru_sosend( \
   77                                     so, NULL, 0, m, 0, flags, td)
   78 
   79 static int  nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
   80         u_int8_t *rpcodep, struct thread *td);
   81 static int  smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td);
   82 
   83 static int
   84 nb_setsockopt_int(struct socket *so, int level, int name, int val)
   85 {
   86         struct sockopt sopt;
   87 
   88         bzero(&sopt, sizeof(sopt));
   89         sopt.sopt_level = level;
   90         sopt.sopt_name = name;
   91         sopt.sopt_val = &val;
   92         sopt.sopt_valsize = sizeof(val);
   93         return sosetopt(so, &sopt);
   94 }
   95 
   96 static __inline int
   97 nb_poll(struct nbpcb *nbp, int events, struct thread *td)
   98 {
   99         return nbp->nbp_tso->so_proto->pr_usrreqs->pru_sopoll(nbp->nbp_tso,
  100             events, NULL, td);
  101 }
  102 
  103 static int
  104 nbssn_rselect(struct nbpcb *nbp, struct timeval *tv, int events,
  105         struct thread *td)
  106 {
  107         struct timeval atv, rtv, ttv;
  108         int ncoll, timo, error;
  109 
  110         if (tv) {
  111                 atv = *tv;
  112                 if (itimerfix(&atv)) {
  113                         error = EINVAL;
  114                         goto done_noproclock;
  115                 }
  116                 getmicrouptime(&rtv);
  117                 timevaladd(&atv, &rtv);
  118         }
  119         timo = 0;
  120         mtx_lock(&sellock);
  121 retry:
  122 
  123         ncoll = nselcoll;
  124         mtx_lock_spin(&sched_lock);
  125         td->td_flags |= TDF_SELECT;
  126         mtx_unlock_spin(&sched_lock);
  127         mtx_unlock(&sellock);
  128 
  129         /* XXX: Should be done when the thread is initialized. */
  130         TAILQ_INIT(&td->td_selq);
  131         error = nb_poll(nbp, events, td);
  132         mtx_lock(&sellock);
  133         if (error) {
  134                 error = 0;
  135                 goto done;
  136         }
  137         if (tv) {
  138                 getmicrouptime(&rtv);
  139                 if (timevalcmp(&rtv, &atv, >=))
  140                         goto done;
  141                 ttv = atv;
  142                 timevalsub(&ttv, &rtv);
  143                 timo = tvtohz(&ttv);
  144         }
  145         /*
  146          * An event of our interest may occur during locking a process.
  147          * In order to avoid missing the event that occurred during locking
  148          * the process, test P_SELECT and rescan file descriptors if
  149          * necessary.
  150          */
  151         mtx_lock_spin(&sched_lock);
  152         if ((td->td_flags & TDF_SELECT) == 0 || nselcoll != ncoll) {
  153                 mtx_unlock_spin(&sched_lock);
  154                 goto retry;
  155         }
  156         mtx_unlock_spin(&sched_lock);
  157 
  158         if (timo > 0)
  159                 error = cv_timedwait(&selwait, &sellock, timo);
  160         else {
  161                 cv_wait(&selwait, &sellock);
  162                 error = 0;
  163         }
  164 
  165 done:
  166         clear_selinfo_list(td);
  167         
  168         mtx_lock_spin(&sched_lock);
  169         td->td_flags &= ~TDF_SELECT;
  170         mtx_unlock_spin(&sched_lock);
  171         mtx_unlock(&sellock);
  172 
  173 done_noproclock:
  174         if (error == ERESTART)
  175                 return 0;
  176         return error;
  177 }
  178 
  179 static int
  180 nb_intr(struct nbpcb *nbp, struct proc *p)
  181 {
  182         return 0;
  183 }
  184 
  185 static void
  186 nb_upcall(struct socket *so, void *arg, int waitflag)
  187 {
  188         struct nbpcb *nbp = arg;
  189 
  190         if (arg == NULL || nbp->nbp_selectid == NULL)
  191                 return;
  192         wakeup(nbp->nbp_selectid);
  193 }
  194 
  195 static int
  196 nb_sethdr(struct mbuf *m, u_int8_t type, u_int32_t len)
  197 {
  198         u_int32_t *p = mtod(m, u_int32_t *);
  199 
  200         *p = htonl((len & 0x1FFFF) | (type << 24));
  201         return 0;
  202 }
  203 
  204 static int
  205 nb_put_name(struct mbchain *mbp, struct sockaddr_nb *snb)
  206 {
  207         int error;
  208         u_char seglen, *cp;
  209 
  210         cp = snb->snb_name;
  211         if (*cp == 0)
  212                 return EINVAL;
  213         NBDEBUG("[%s]\n", cp);
  214         for (;;) {
  215                 seglen = (*cp) + 1;
  216                 error = mb_put_mem(mbp, cp, seglen, MB_MSYSTEM);
  217                 if (error)
  218                         return error;
  219                 if (seglen == 1)
  220                         break;
  221                 cp += seglen;
  222         }
  223         return 0;
  224 }
  225 
  226 static int
  227 nb_connect_in(struct nbpcb *nbp, struct sockaddr_in *to, struct thread *td)
  228 {
  229         struct socket *so;
  230         int error, s;
  231 
  232         error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP,
  233             td->td_ucred, td);
  234         if (error)
  235                 return error;
  236         nbp->nbp_tso = so;
  237         so->so_upcallarg = (caddr_t)nbp;
  238         so->so_upcall = nb_upcall;
  239         so->so_rcv.sb_flags |= SB_UPCALL;
  240         so->so_rcv.sb_timeo = (5 * hz);
  241         so->so_snd.sb_timeo = (5 * hz);
  242         error = soreserve(so, nbp->nbp_sndbuf, nbp->nbp_rcvbuf);
  243         if (error)
  244                 goto bad;
  245         nb_setsockopt_int(so, SOL_SOCKET, SO_KEEPALIVE, 1);
  246         nb_setsockopt_int(so, IPPROTO_TCP, TCP_NODELAY, 1);
  247         so->so_rcv.sb_flags &= ~SB_NOINTR;
  248         so->so_snd.sb_flags &= ~SB_NOINTR;
  249         error = soconnect(so, (struct sockaddr*)to, td);
  250         if (error)
  251                 goto bad;
  252         s = splnet();
  253         while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
  254                 tsleep(&so->so_timeo, PSOCK, "nbcon", 2 * hz);
  255                 if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 &&
  256                         (error = nb_intr(nbp, td->td_proc)) != 0) {
  257                         so->so_state &= ~SS_ISCONNECTING;
  258                         splx(s);
  259                         goto bad;
  260                 }
  261         }
  262         if (so->so_error) {
  263                 error = so->so_error;
  264                 so->so_error = 0;
  265                 splx(s);
  266                 goto bad;
  267         }
  268         splx(s);
  269         return 0;
  270 bad:
  271         smb_nbst_disconnect(nbp->nbp_vc, td);
  272         return error;
  273 }
  274 
  275 static int
  276 nbssn_rq_request(struct nbpcb *nbp, struct thread *td)
  277 {
  278         struct mbchain mb, *mbp = &mb;
  279         struct mdchain md, *mdp = &md;
  280         struct mbuf *m0;
  281         struct timeval tv;
  282         struct sockaddr_in sin;
  283         u_short port;
  284         u_int8_t rpcode;
  285         int error, rplen;
  286 
  287         error = mb_init(mbp);
  288         if (error)
  289                 return error;
  290         mb_put_uint32le(mbp, 0);
  291         nb_put_name(mbp, nbp->nbp_paddr);
  292         nb_put_name(mbp, nbp->nbp_laddr);
  293         nb_sethdr(mbp->mb_top, NB_SSN_REQUEST, mb_fixhdr(mbp) - 4);
  294         error = nb_sosend(nbp->nbp_tso, mbp->mb_top, 0, td);
  295         if (!error) {
  296                 nbp->nbp_state = NBST_RQSENT;
  297         }
  298         mb_detach(mbp);
  299         mb_done(mbp);
  300         if (error)
  301                 return error;
  302         TIMESPEC_TO_TIMEVAL(&tv, &nbp->nbp_timo);
  303         error = nbssn_rselect(nbp, &tv, POLLIN, td);
  304         if (error == EWOULDBLOCK) {     /* Timeout */
  305                 NBDEBUG("initial request timeout\n");
  306                 return ETIMEDOUT;
  307         }
  308         if (error)                      /* restart or interrupt */
  309                 return error;
  310         error = nbssn_recv(nbp, &m0, &rplen, &rpcode, td);
  311         if (error) {
  312                 NBDEBUG("recv() error %d\n", error);
  313                 return error;
  314         }
  315         /*
  316          * Process NETBIOS reply
  317          */
  318         if (m0)
  319                 md_initm(mdp, m0);
  320         error = 0;
  321         do {
  322                 if (rpcode == NB_SSN_POSRESP) {
  323                         nbp->nbp_state = NBST_SESSION;
  324                         nbp->nbp_flags |= NBF_CONNECTED;
  325                         break;
  326                 }
  327                 if (rpcode != NB_SSN_RTGRESP) {
  328                         error = ECONNABORTED;
  329                         break;
  330                 }
  331                 if (rplen != 6) {
  332                         error = ECONNABORTED;
  333                         break;
  334                 }
  335                 md_get_mem(mdp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM);
  336                 md_get_uint16(mdp, &port);
  337                 sin.sin_port = port;
  338                 nbp->nbp_state = NBST_RETARGET;
  339                 smb_nbst_disconnect(nbp->nbp_vc, td);
  340                 error = nb_connect_in(nbp, &sin, td);
  341                 if (!error)
  342                         error = nbssn_rq_request(nbp, td);
  343                 if (error) {
  344                         smb_nbst_disconnect(nbp->nbp_vc, td);
  345                         break;
  346                 }
  347         } while(0);
  348         if (m0)
  349                 md_done(mdp);
  350         return error;
  351 }
  352 
  353 static int
  354 nbssn_recvhdr(struct nbpcb *nbp, int *lenp,
  355         u_int8_t *rpcodep, int flags, struct thread *td)
  356 {
  357         struct socket *so = nbp->nbp_tso;
  358         struct uio auio;
  359         struct iovec aio;
  360         u_int32_t len;
  361         int error;
  362 
  363         aio.iov_base = (caddr_t)&len;
  364         aio.iov_len = sizeof(len);
  365         auio.uio_iov = &aio;
  366         auio.uio_iovcnt = 1;
  367         auio.uio_segflg = UIO_SYSSPACE;
  368         auio.uio_rw = UIO_READ;
  369         auio.uio_offset = 0;
  370         auio.uio_resid = sizeof(len);
  371         auio.uio_td = td;
  372         error = so->so_proto->pr_usrreqs->pru_soreceive
  373             (so, (struct sockaddr **)NULL, &auio,
  374             (struct mbuf **)NULL, (struct mbuf **)NULL, &flags);
  375         if (error)
  376                 return error;
  377         if (auio.uio_resid > 0) {
  378                 SMBSDEBUG("short reply\n");
  379                 return EPIPE;
  380         }
  381         len = ntohl(len);
  382         *rpcodep = (len >> 24) & 0xFF;
  383         len &= 0x1ffff;
  384         if (len > SMB_MAXPKTLEN) {
  385                 SMBERROR("packet too long (%d)\n", len);
  386                 return EFBIG;
  387         }
  388         *lenp = len;
  389         return 0;
  390 }
  391 
  392 static int
  393 nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
  394         u_int8_t *rpcodep, struct thread *td)
  395 {
  396         struct socket *so = nbp->nbp_tso;
  397         struct uio auio;
  398         struct mbuf *m, *tm, *im;
  399         u_int8_t rpcode;
  400         int len, resid;
  401         int error, rcvflg;
  402 
  403         if (so == NULL)
  404                 return ENOTCONN;
  405 
  406         if (mpp)
  407                 *mpp = NULL;
  408         m = NULL;
  409         for(;;) {
  410                 /*
  411                  * Poll for a response header.
  412                  * If we don't have one waiting, return.
  413                  */
  414                 error = nbssn_recvhdr(nbp, &len, &rpcode, MSG_DONTWAIT, td);
  415                 if (so->so_state &
  416                     (SS_ISDISCONNECTING | SS_ISDISCONNECTED | SS_CANTRCVMORE)) {
  417                         nbp->nbp_state = NBST_CLOSED;
  418                         NBDEBUG("session closed by peer\n");
  419                         return ECONNRESET;
  420                 }
  421                 if (error)
  422                         return error;
  423                 if (len == 0 && nbp->nbp_state != NBST_SESSION)
  424                         break;
  425                 /* no data, try again */
  426                 if (rpcode == NB_SSN_KEEPALIVE)
  427                         continue;
  428 
  429                 /*
  430                  * Loop, blocking, for data following the response header.
  431                  *
  432                  * Note that we can't simply block here with MSG_WAITALL for the
  433                  * entire response size, as it may be larger than the TCP
  434                  * slow-start window that the sender employs.  This will result
  435                  * in the sender stalling until the delayed ACK is sent, then
  436                  * resuming slow-start, resulting in very poor performance.
  437                  *
  438                  * Instead, we never request more than NB_SORECEIVE_CHUNK
  439                  * bytes at a time, resulting in an ack being pushed by
  440                  * the TCP code at the completion of each call.
  441                  */
  442                 resid = len;
  443                 while (resid > 0) {
  444                         tm = NULL;
  445                         rcvflg = MSG_WAITALL;
  446                         bzero(&auio, sizeof(auio));
  447                         auio.uio_resid = min(resid, NB_SORECEIVE_CHUNK);
  448                         auio.uio_td = td;
  449                         resid -= auio.uio_resid;
  450                         /*
  451                          * Spin until we have collected everything in
  452                          * this chunk.
  453                          */
  454                         do {
  455                                 rcvflg = MSG_WAITALL;
  456                                 error = so->so_proto->pr_usrreqs->pru_soreceive
  457                                     (so, (struct sockaddr **)NULL,
  458                                     &auio, &tm, (struct mbuf **)NULL, &rcvflg);
  459                         } while (error == EWOULDBLOCK || error == EINTR ||
  460                                  error == ERESTART);
  461                         if (error)
  462                                 goto out;
  463                         /* short return guarantees unhappiness */
  464                         if (auio.uio_resid > 0) {
  465                                 SMBERROR("packet is shorter than expected\n");
  466                                 error = EPIPE;
  467                                 goto out;
  468                         }
  469                         /* append received chunk to previous chunk(s) */
  470                         if (m == NULL) {
  471                                 m = tm;
  472                         } else {
  473                                 /*
  474                                  * Just glue the new chain on the end.
  475                                  * Consumer will pullup as required.
  476                                  */
  477                                 for (im = m; im->m_next != NULL; im = im->m_next)
  478                                         ;
  479                                 im->m_next = tm;
  480                         }
  481                 }
  482                 /* got a session/message packet? */
  483                 if (nbp->nbp_state == NBST_SESSION &&
  484                     rpcode == NB_SSN_MESSAGE)
  485                         break;
  486                 /* drop packet and try for another */
  487                 NBDEBUG("non-session packet %x\n", rpcode);
  488                 if (m) {
  489                         m_freem(m);
  490                         m = NULL;
  491                 }
  492         }
  493 
  494 out:
  495         if (error) {
  496                 if (m)
  497                         m_freem(m);
  498                 return error;
  499         }
  500         if (mpp)
  501                 *mpp = m;
  502         else
  503                 m_freem(m);
  504         *lenp = len;
  505         *rpcodep = rpcode;
  506         return 0;
  507 }
  508 
  509 /*
  510  * SMB transport interface
  511  */
  512 static int
  513 smb_nbst_create(struct smb_vc *vcp, struct thread *td)
  514 {
  515         struct nbpcb *nbp;
  516 
  517         MALLOC(nbp, struct nbpcb *, sizeof *nbp, M_NBDATA, M_WAITOK);
  518         bzero(nbp, sizeof *nbp);
  519         nbp->nbp_timo.tv_sec = 15;      /* XXX: sysctl ? */
  520         nbp->nbp_state = NBST_CLOSED;
  521         nbp->nbp_vc = vcp;
  522         nbp->nbp_sndbuf = smb_tcpsndbuf;
  523         nbp->nbp_rcvbuf = smb_tcprcvbuf;
  524         vcp->vc_tdata = nbp;
  525         return 0;
  526 }
  527 
  528 static int
  529 smb_nbst_done(struct smb_vc *vcp, struct thread *td)
  530 {
  531         struct nbpcb *nbp = vcp->vc_tdata;
  532 
  533         if (nbp == NULL)
  534                 return ENOTCONN;
  535         smb_nbst_disconnect(vcp, td);
  536         if (nbp->nbp_laddr)
  537                 free(nbp->nbp_laddr, M_SONAME);
  538         if (nbp->nbp_paddr)
  539                 free(nbp->nbp_paddr, M_SONAME);
  540         free(nbp, M_NBDATA);
  541         return 0;
  542 }
  543 
  544 static int
  545 smb_nbst_bind(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
  546 {
  547         struct nbpcb *nbp = vcp->vc_tdata;
  548         struct sockaddr_nb *snb;
  549         int error, slen;
  550 
  551         NBDEBUG("\n");
  552         error = EINVAL;
  553         do {
  554                 if (nbp->nbp_flags & NBF_LOCADDR)
  555                         break;
  556                 /*
  557                  * It is possible to create NETBIOS name in the kernel,
  558                  * but nothing prevents us to do it in the user space.
  559                  */
  560                 if (sap == NULL)
  561                         break;
  562                 slen = sap->sa_len;
  563                 if (slen < NB_MINSALEN)
  564                         break;
  565                 snb = (struct sockaddr_nb*)dup_sockaddr(sap, 1);
  566                 if (snb == NULL) {
  567                         error = ENOMEM;
  568                         break;
  569                 }
  570                 nbp->nbp_laddr = snb;
  571                 nbp->nbp_flags |= NBF_LOCADDR;
  572                 error = 0;
  573         } while(0);
  574         return error;
  575 }
  576 
  577 static int
  578 smb_nbst_connect(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
  579 {
  580         struct nbpcb *nbp = vcp->vc_tdata;
  581         struct sockaddr_in sin;
  582         struct sockaddr_nb *snb;
  583         struct timespec ts1, ts2;
  584         int error, slen;
  585 
  586         NBDEBUG("\n");
  587         if (nbp->nbp_tso != NULL)
  588                 return EISCONN;
  589         if (nbp->nbp_laddr == NULL)
  590                 return EINVAL;
  591         slen = sap->sa_len;
  592         if (slen < NB_MINSALEN)
  593                 return EINVAL;
  594         if (nbp->nbp_paddr) {
  595                 free(nbp->nbp_paddr, M_SONAME);
  596                 nbp->nbp_paddr = NULL;
  597         }
  598         snb = (struct sockaddr_nb*)dup_sockaddr(sap, 1);
  599         if (snb == NULL)
  600                 return ENOMEM;
  601         nbp->nbp_paddr = snb;
  602         sin = snb->snb_addrin;
  603         getnanotime(&ts1);
  604         error = nb_connect_in(nbp, &sin, td);
  605         if (error)
  606                 return error;
  607         getnanotime(&ts2);
  608         timespecsub(&ts2, &ts1);
  609         if (ts2.tv_sec == 0 && ts2.tv_sec == 0)
  610                 ts2.tv_sec = 1;
  611         nbp->nbp_timo = ts2;
  612         timespecadd(&nbp->nbp_timo, &ts2);
  613         timespecadd(&nbp->nbp_timo, &ts2);
  614         timespecadd(&nbp->nbp_timo, &ts2);      /*  * 4 */
  615         error = nbssn_rq_request(nbp, td);
  616         if (error)
  617                 smb_nbst_disconnect(vcp, td);
  618         return error;
  619 }
  620 
  621 static int
  622 smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td)
  623 {
  624         struct nbpcb *nbp = vcp->vc_tdata;
  625         struct socket *so;
  626 
  627         if (nbp == NULL || nbp->nbp_tso == NULL)
  628                 return ENOTCONN;
  629         if ((so = nbp->nbp_tso) != NULL) {
  630                 nbp->nbp_flags &= ~NBF_CONNECTED;
  631                 nbp->nbp_tso = (struct socket *)NULL;
  632                 soshutdown(so, 2);
  633                 soclose(so);
  634         }
  635         if (nbp->nbp_state != NBST_RETARGET) {
  636                 nbp->nbp_state = NBST_CLOSED;
  637         }
  638         return 0;
  639 }
  640 
  641 static int
  642 smb_nbst_send(struct smb_vc *vcp, struct mbuf *m0, struct thread *td)
  643 {
  644         struct nbpcb *nbp = vcp->vc_tdata;
  645         int error;
  646 
  647         if (nbp->nbp_state != NBST_SESSION) {
  648                 error = ENOTCONN;
  649                 goto abort;
  650         }
  651         M_PREPEND(m0, 4, M_TRYWAIT);
  652         if (m0 == NULL)
  653                 return ENOBUFS;
  654         nb_sethdr(m0, NB_SSN_MESSAGE, m_fixhdr(m0) - 4);
  655         error = nb_sosend(nbp->nbp_tso, m0, 0, td);
  656         return error;
  657 abort:
  658         if (m0)
  659                 m_freem(m0);
  660         return error;
  661 }
  662 
  663 
  664 static int
  665 smb_nbst_recv(struct smb_vc *vcp, struct mbuf **mpp, struct thread *td)
  666 {
  667         struct nbpcb *nbp = vcp->vc_tdata;
  668         u_int8_t rpcode;
  669         int error, rplen;
  670 
  671         nbp->nbp_flags |= NBF_RECVLOCK;
  672         error = nbssn_recv(nbp, mpp, &rplen, &rpcode, td);
  673         nbp->nbp_flags &= ~NBF_RECVLOCK;
  674         return error;
  675 }
  676 
  677 static void
  678 smb_nbst_timo(struct smb_vc *vcp)
  679 {
  680         return;
  681 }
  682 
  683 static void
  684 smb_nbst_intr(struct smb_vc *vcp)
  685 {
  686         struct nbpcb *nbp = vcp->vc_tdata;
  687 
  688         if (nbp == NULL || nbp->nbp_tso == NULL)
  689                 return;
  690         sorwakeup(nbp->nbp_tso);
  691         sowwakeup(nbp->nbp_tso);
  692 }
  693 
  694 static int
  695 smb_nbst_getparam(struct smb_vc *vcp, int param, void *data)
  696 {
  697         struct nbpcb *nbp = vcp->vc_tdata;
  698 
  699         switch (param) {
  700             case SMBTP_SNDSZ:
  701                 *(int*)data = nbp->nbp_sndbuf;
  702                 break;
  703             case SMBTP_RCVSZ:
  704                 *(int*)data = nbp->nbp_rcvbuf;
  705                 break;
  706             case SMBTP_TIMEOUT:
  707                 *(struct timespec*)data = nbp->nbp_timo;
  708                 break;
  709             default:
  710                 return EINVAL;
  711         }
  712         return 0;
  713 }
  714 
  715 static int
  716 smb_nbst_setparam(struct smb_vc *vcp, int param, void *data)
  717 {
  718         struct nbpcb *nbp = vcp->vc_tdata;
  719 
  720         switch (param) {
  721             case SMBTP_SELECTID:
  722                 nbp->nbp_selectid = data;
  723                 break;
  724             default:
  725                 return EINVAL;
  726         }
  727         return 0;
  728 }
  729 
  730 /*
  731  * Check for fatal errors
  732  */
  733 static int
  734 smb_nbst_fatal(struct smb_vc *vcp, int error)
  735 {
  736         switch (error) {
  737             case ENOTCONN:
  738             case ENETRESET:
  739             case ECONNABORTED:
  740                 return 1;
  741         }
  742         return 0;
  743 }
  744 
  745 
  746 struct smb_tran_desc smb_tran_nbtcp_desc = {
  747         SMBT_NBTCP,
  748         smb_nbst_create, smb_nbst_done,
  749         smb_nbst_bind, smb_nbst_connect, smb_nbst_disconnect,
  750         smb_nbst_send, smb_nbst_recv,
  751         smb_nbst_timo, smb_nbst_intr,
  752         smb_nbst_getparam, smb_nbst_setparam,
  753         smb_nbst_fatal
  754 };
  755
Cache object: a74e7783fe30755d33e6ba25a3d14a01
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.
FreeBSD/Linux Kernel Cross Reference sys/netsmb/smb_trantcp.c

FreeBSD/Linux Kernel Cross Reference
sys/netsmb/smb_trantcp.c
