The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netsmb/smb_trantcp.c

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    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  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/10.1/sys/netsmb/smb_trantcp.c 258123 2013-11-14 09:19:50Z glebius $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/condvar.h>
   32 #include <sys/kernel.h>
   33 #include <sys/lock.h>
   34 #include <sys/malloc.h>
   35 #include <sys/mbuf.h>
   36 #include <sys/poll.h>
   37 #include <sys/proc.h>
   38 #include <sys/protosw.h>
   39 #include <sys/signalvar.h>
   40 #include <sys/socket.h>
   41 #include <sys/socketvar.h>
   42 #include <sys/sx.h>
   43 #include <sys/sysctl.h>
   44 #include <sys/systm.h>
   45 #include <sys/uio.h>
   46 
   47 #include <net/if.h>
   48 #include <net/route.h>
   49 #include <net/vnet.h>
   50 
   51 #include <netinet/in.h>
   52 #include <netinet/tcp.h>
   53 
   54 #include <sys/mchain.h>
   55 
   56 #include <netsmb/netbios.h>
   57 
   58 #include <netsmb/smb.h>
   59 #include <netsmb/smb_conn.h>
   60 #include <netsmb/smb_tran.h>
   61 #include <netsmb/smb_trantcp.h>
   62 #include <netsmb/smb_subr.h>
   63 
   64 #define M_NBDATA        M_PCB
   65 
   66 static int smb_tcpsndbuf = NB_SNDQ - 1;
   67 static int smb_tcprcvbuf = NB_RCVQ - 1;
   68 
   69 SYSCTL_DECL(_net_smb);
   70 SYSCTL_INT(_net_smb, OID_AUTO, tcpsndbuf, CTLFLAG_RW, &smb_tcpsndbuf, 0, "");
   71 SYSCTL_INT(_net_smb, OID_AUTO, tcprcvbuf, CTLFLAG_RW, &smb_tcprcvbuf, 0, "");
   72 
   73 #define nb_sosend(so,m,flags,td) sosend(so, NULL, 0, m, 0, flags, td)
   74 
   75 static int  nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
   76         u_int8_t *rpcodep, struct thread *td);
   77 static int  smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td);
   78 
   79 static int
   80 nb_setsockopt_int(struct socket *so, int level, int name, int val)
   81 {
   82         struct sockopt sopt;
   83         int error;
   84 
   85         bzero(&sopt, sizeof(sopt));
   86         sopt.sopt_level = level;
   87         sopt.sopt_name = name;
   88         sopt.sopt_val = &val;
   89         sopt.sopt_valsize = sizeof(val);
   90         CURVNET_SET(so->so_vnet);
   91         error = sosetopt(so, &sopt);
   92         CURVNET_RESTORE();
   93         return error;
   94 }
   95 
   96 static int
   97 nb_intr(struct nbpcb *nbp, struct proc *p)
   98 {
   99         return 0;
  100 }
  101 
  102 static int
  103 nb_upcall(struct socket *so, void *arg, int waitflag)
  104 {
  105         struct nbpcb *nbp = arg;
  106 
  107         if (arg == NULL || nbp->nbp_selectid == NULL)
  108                 return (SU_OK);
  109         wakeup(nbp->nbp_selectid);
  110         return (SU_OK);
  111 }
  112 
  113 static int
  114 nb_sethdr(struct mbuf *m, u_int8_t type, u_int32_t len)
  115 {
  116         u_int32_t *p = mtod(m, u_int32_t *);
  117 
  118         *p = htonl((len & 0x1FFFF) | (type << 24));
  119         return 0;
  120 }
  121 
  122 static int
  123 nb_put_name(struct mbchain *mbp, struct sockaddr_nb *snb)
  124 {
  125         int error;
  126         u_char seglen, *cp;
  127 
  128         cp = snb->snb_name;
  129         if (*cp == 0)
  130                 return EINVAL;
  131         NBDEBUG("[%s]\n", cp);
  132         for (;;) {
  133                 seglen = (*cp) + 1;
  134                 error = mb_put_mem(mbp, cp, seglen, MB_MSYSTEM);
  135                 if (error)
  136                         return error;
  137                 if (seglen == 1)
  138                         break;
  139                 cp += seglen;
  140         }
  141         return 0;
  142 }
  143 
  144 static int
  145 nb_connect_in(struct nbpcb *nbp, struct sockaddr_in *to, struct thread *td)
  146 {
  147         struct socket *so;
  148         int error, s;
  149 
  150         error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP,
  151             td->td_ucred, td);
  152         if (error)
  153                 return error;
  154         nbp->nbp_tso = so;
  155         SOCKBUF_LOCK(&so->so_rcv);
  156         soupcall_set(so, SO_RCV, nb_upcall, nbp);
  157         SOCKBUF_UNLOCK(&so->so_rcv);
  158         so->so_rcv.sb_timeo = (5 * SBT_1S);
  159         so->so_snd.sb_timeo = (5 * SBT_1S);
  160         error = soreserve(so, nbp->nbp_sndbuf, nbp->nbp_rcvbuf);
  161         if (error)
  162                 goto bad;
  163         nb_setsockopt_int(so, SOL_SOCKET, SO_KEEPALIVE, 1);
  164         nb_setsockopt_int(so, IPPROTO_TCP, TCP_NODELAY, 1);
  165         SOCKBUF_LOCK(&so->so_rcv);
  166         so->so_rcv.sb_flags &= ~SB_NOINTR;
  167         SOCKBUF_UNLOCK(&so->so_rcv);
  168         SOCKBUF_LOCK(&so->so_snd);
  169         so->so_snd.sb_flags &= ~SB_NOINTR;
  170         SOCKBUF_UNLOCK(&so->so_snd);
  171         error = soconnect(so, (struct sockaddr*)to, td);
  172         if (error)
  173                 goto bad;
  174         s = splnet();
  175         while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
  176                 tsleep(&so->so_timeo, PSOCK, "nbcon", 2 * hz);
  177                 if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 &&
  178                         (error = nb_intr(nbp, td->td_proc)) != 0) {
  179                         so->so_state &= ~SS_ISCONNECTING;
  180                         splx(s);
  181                         goto bad;
  182                 }
  183         }
  184         if (so->so_error) {
  185                 error = so->so_error;
  186                 so->so_error = 0;
  187                 splx(s);
  188                 goto bad;
  189         }
  190         splx(s);
  191         return 0;
  192 bad:
  193         smb_nbst_disconnect(nbp->nbp_vc, td);
  194         return error;
  195 }
  196 
  197 static int
  198 nbssn_rq_request(struct nbpcb *nbp, struct thread *td)
  199 {
  200         struct mbchain *mbp;
  201         struct mdchain *mdp;
  202         struct mbuf *m0;
  203         struct timeval tv;
  204         struct sockaddr_in sin;
  205         u_short port;
  206         u_int8_t rpcode;
  207         int error, rplen;
  208 
  209         mbp = malloc(sizeof(struct mbchain), M_NBDATA, M_WAITOK);
  210         mdp = malloc(sizeof(struct mbchain), M_NBDATA, M_WAITOK);
  211         error = mb_init(mbp);
  212         if (error) {
  213                 free(mbp, M_NBDATA);
  214                 free(mdp, M_NBDATA);
  215                 return error;
  216         }
  217         mb_put_uint32le(mbp, 0);
  218         nb_put_name(mbp, nbp->nbp_paddr);
  219         nb_put_name(mbp, nbp->nbp_laddr);
  220         nb_sethdr(mbp->mb_top, NB_SSN_REQUEST, mb_fixhdr(mbp) - 4);
  221         error = nb_sosend(nbp->nbp_tso, mbp->mb_top, 0, td);
  222         if (!error) {
  223                 nbp->nbp_state = NBST_RQSENT;
  224         }
  225         mb_detach(mbp);
  226         mb_done(mbp);
  227         free(mbp, M_NBDATA);
  228         if (error) {
  229                 free(mdp, M_NBDATA);
  230                 return error;
  231         }
  232         TIMESPEC_TO_TIMEVAL(&tv, &nbp->nbp_timo);
  233         error = selsocket(nbp->nbp_tso, POLLIN, &tv, td);
  234         if (error == EWOULDBLOCK) {     /* Timeout */
  235                 NBDEBUG("initial request timeout\n");
  236                 free(mdp, M_NBDATA);
  237                 return ETIMEDOUT;
  238         }
  239         if (error) {                    /* restart or interrupt */
  240                 free(mdp, M_NBDATA);
  241                 return error;
  242         }
  243         error = nbssn_recv(nbp, &m0, &rplen, &rpcode, td);
  244         if (error) {
  245                 NBDEBUG("recv() error %d\n", error);
  246                 free(mdp, M_NBDATA);
  247                 return error;
  248         }
  249         /*
  250          * Process NETBIOS reply
  251          */
  252         if (m0)
  253                 md_initm(mdp, m0);
  254         error = 0;
  255         do {
  256                 if (rpcode == NB_SSN_POSRESP) {
  257                         nbp->nbp_state = NBST_SESSION;
  258                         nbp->nbp_flags |= NBF_CONNECTED;
  259                         break;
  260                 }
  261                 if (rpcode != NB_SSN_RTGRESP) {
  262                         error = ECONNABORTED;
  263                         break;
  264                 }
  265                 if (rplen != 6) {
  266                         error = ECONNABORTED;
  267                         break;
  268                 }
  269                 md_get_mem(mdp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM);
  270                 md_get_uint16(mdp, &port);
  271                 sin.sin_port = port;
  272                 nbp->nbp_state = NBST_RETARGET;
  273                 smb_nbst_disconnect(nbp->nbp_vc, td);
  274                 error = nb_connect_in(nbp, &sin, td);
  275                 if (!error)
  276                         error = nbssn_rq_request(nbp, td);
  277                 if (error) {
  278                         smb_nbst_disconnect(nbp->nbp_vc, td);
  279                         break;
  280                 }
  281         } while(0);
  282         if (m0)
  283                 md_done(mdp);
  284         free(mdp, M_NBDATA);
  285         return error;
  286 }
  287 
  288 static int
  289 nbssn_recvhdr(struct nbpcb *nbp, int *lenp,
  290         u_int8_t *rpcodep, int flags, struct thread *td)
  291 {
  292         struct socket *so = nbp->nbp_tso;
  293         struct uio auio;
  294         struct iovec aio;
  295         u_int32_t len;
  296         int error;
  297 
  298         aio.iov_base = (caddr_t)&len;
  299         aio.iov_len = sizeof(len);
  300         auio.uio_iov = &aio;
  301         auio.uio_iovcnt = 1;
  302         auio.uio_segflg = UIO_SYSSPACE;
  303         auio.uio_rw = UIO_READ;
  304         auio.uio_offset = 0;
  305         auio.uio_resid = sizeof(len);
  306         auio.uio_td = td;
  307         CURVNET_SET(so->so_vnet);
  308         error = soreceive(so, (struct sockaddr **)NULL, &auio,
  309             (struct mbuf **)NULL, (struct mbuf **)NULL, &flags);
  310         CURVNET_RESTORE();
  311         if (error)
  312                 return error;
  313         if (auio.uio_resid > 0) {
  314                 SMBSDEBUG("short reply\n");
  315                 return EPIPE;
  316         }
  317         len = ntohl(len);
  318         *rpcodep = (len >> 24) & 0xFF;
  319         len &= 0x1ffff;
  320         if (len > SMB_MAXPKTLEN) {
  321                 SMBERROR("packet too long (%d)\n", len);
  322                 return EFBIG;
  323         }
  324         *lenp = len;
  325         return 0;
  326 }
  327 
  328 static int
  329 nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
  330         u_int8_t *rpcodep, struct thread *td)
  331 {
  332         struct socket *so = nbp->nbp_tso;
  333         struct uio auio;
  334         struct mbuf *m, *tm, *im;
  335         u_int8_t rpcode;
  336         int len, resid;
  337         int error, rcvflg;
  338 
  339         if (so == NULL)
  340                 return ENOTCONN;
  341 
  342         if (mpp)
  343                 *mpp = NULL;
  344         m = NULL;
  345         for(;;) {
  346                 /*
  347                  * Poll for a response header.
  348                  * If we don't have one waiting, return.
  349                  */
  350                 len = 0;
  351                 rpcode = 0;
  352                 error = nbssn_recvhdr(nbp, &len, &rpcode, MSG_DONTWAIT, td);
  353                 if ((so->so_state & (SS_ISDISCONNECTING | SS_ISDISCONNECTED)) ||
  354                     (so->so_rcv.sb_state & SBS_CANTRCVMORE)) {
  355                         nbp->nbp_state = NBST_CLOSED;
  356                         NBDEBUG("session closed by peer\n");
  357                         return ECONNRESET;
  358                 }
  359                 if (error)
  360                         return error;
  361                 if (len == 0 && nbp->nbp_state != NBST_SESSION)
  362                         break;
  363                 /* no data, try again */
  364                 if (rpcode == NB_SSN_KEEPALIVE)
  365                         continue;
  366 
  367                 /*
  368                  * Loop, blocking, for data following the response header.
  369                  *
  370                  * Note that we can't simply block here with MSG_WAITALL for the
  371                  * entire response size, as it may be larger than the TCP
  372                  * slow-start window that the sender employs.  This will result
  373                  * in the sender stalling until the delayed ACK is sent, then
  374                  * resuming slow-start, resulting in very poor performance.
  375                  *
  376                  * Instead, we never request more than NB_SORECEIVE_CHUNK
  377                  * bytes at a time, resulting in an ack being pushed by
  378                  * the TCP code at the completion of each call.
  379                  */
  380                 resid = len;
  381                 while (resid > 0) {
  382                         tm = NULL;
  383                         rcvflg = MSG_WAITALL;
  384                         bzero(&auio, sizeof(auio));
  385                         auio.uio_resid = min(resid, NB_SORECEIVE_CHUNK);
  386                         auio.uio_td = td;
  387                         resid -= auio.uio_resid;
  388                         /*
  389                          * Spin until we have collected everything in
  390                          * this chunk.
  391                          */
  392                         do {
  393                                 rcvflg = MSG_WAITALL;
  394                                 CURVNET_SET(so->so_vnet);
  395                                 error = soreceive(so, (struct sockaddr **)NULL,
  396                                     &auio, &tm, (struct mbuf **)NULL, &rcvflg);
  397                                 CURVNET_RESTORE();
  398                         } while (error == EWOULDBLOCK || error == EINTR ||
  399                                  error == ERESTART);
  400                         if (error)
  401                                 goto out;
  402                         /* short return guarantees unhappiness */
  403                         if (auio.uio_resid > 0) {
  404                                 SMBERROR("packet is shorter than expected\n");
  405                                 error = EPIPE;
  406                                 goto out;
  407                         }
  408                         /* append received chunk to previous chunk(s) */
  409                         if (m == NULL) {
  410                                 m = tm;
  411                         } else {
  412                                 /*
  413                                  * Just glue the new chain on the end.
  414                                  * Consumer will pullup as required.
  415                                  */
  416                                 for (im = m; im->m_next != NULL; im = im->m_next)
  417                                         ;
  418                                 im->m_next = tm;
  419                         }
  420                 }
  421                 /* got a session/message packet? */
  422                 if (nbp->nbp_state == NBST_SESSION &&
  423                     rpcode == NB_SSN_MESSAGE)
  424                         break;
  425                 /* drop packet and try for another */
  426                 NBDEBUG("non-session packet %x\n", rpcode);
  427                 if (m) {
  428                         m_freem(m);
  429                         m = NULL;
  430                 }
  431         }
  432 
  433 out:
  434         if (error) {
  435                 if (m)
  436                         m_freem(m);
  437                 return error;
  438         }
  439         if (mpp)
  440                 *mpp = m;
  441         else
  442                 m_freem(m);
  443         *lenp = len;
  444         *rpcodep = rpcode;
  445         return 0;
  446 }
  447 
  448 /*
  449  * SMB transport interface
  450  */
  451 static int
  452 smb_nbst_create(struct smb_vc *vcp, struct thread *td)
  453 {
  454         struct nbpcb *nbp;
  455 
  456         nbp = malloc(sizeof *nbp, M_NBDATA, M_WAITOK);
  457         bzero(nbp, sizeof *nbp);
  458         nbp->nbp_timo.tv_sec = 15;      /* XXX: sysctl ? */
  459         nbp->nbp_state = NBST_CLOSED;
  460         nbp->nbp_vc = vcp;
  461         nbp->nbp_sndbuf = smb_tcpsndbuf;
  462         nbp->nbp_rcvbuf = smb_tcprcvbuf;
  463         vcp->vc_tdata = nbp;
  464         return 0;
  465 }
  466 
  467 static int
  468 smb_nbst_done(struct smb_vc *vcp, struct thread *td)
  469 {
  470         struct nbpcb *nbp = vcp->vc_tdata;
  471 
  472         if (nbp == NULL)
  473                 return ENOTCONN;
  474         smb_nbst_disconnect(vcp, td);
  475         if (nbp->nbp_laddr)
  476                 free(nbp->nbp_laddr, M_SONAME);
  477         if (nbp->nbp_paddr)
  478                 free(nbp->nbp_paddr, M_SONAME);
  479         free(nbp, M_NBDATA);
  480         return 0;
  481 }
  482 
  483 static int
  484 smb_nbst_bind(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
  485 {
  486         struct nbpcb *nbp = vcp->vc_tdata;
  487         struct sockaddr_nb *snb;
  488         int error, slen;
  489 
  490         NBDEBUG("\n");
  491         error = EINVAL;
  492         do {
  493                 if (nbp->nbp_flags & NBF_LOCADDR)
  494                         break;
  495                 /*
  496                  * It is possible to create NETBIOS name in the kernel,
  497                  * but nothing prevents us to do it in the user space.
  498                  */
  499                 if (sap == NULL)
  500                         break;
  501                 slen = sap->sa_len;
  502                 if (slen < NB_MINSALEN)
  503                         break;
  504                 snb = (struct sockaddr_nb*)sodupsockaddr(sap, M_WAITOK);
  505                 if (snb == NULL) {
  506                         error = ENOMEM;
  507                         break;
  508                 }
  509                 nbp->nbp_laddr = snb;
  510                 nbp->nbp_flags |= NBF_LOCADDR;
  511                 error = 0;
  512         } while(0);
  513         return error;
  514 }
  515 
  516 static int
  517 smb_nbst_connect(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
  518 {
  519         struct nbpcb *nbp = vcp->vc_tdata;
  520         struct sockaddr_in sin;
  521         struct sockaddr_nb *snb;
  522         struct timespec ts1, ts2;
  523         int error, slen;
  524 
  525         NBDEBUG("\n");
  526         if (nbp->nbp_tso != NULL)
  527                 return EISCONN;
  528         if (nbp->nbp_laddr == NULL)
  529                 return EINVAL;
  530         slen = sap->sa_len;
  531         if (slen < NB_MINSALEN)
  532                 return EINVAL;
  533         if (nbp->nbp_paddr) {
  534                 free(nbp->nbp_paddr, M_SONAME);
  535                 nbp->nbp_paddr = NULL;
  536         }
  537         snb = (struct sockaddr_nb*)sodupsockaddr(sap, M_WAITOK);
  538         if (snb == NULL)
  539                 return ENOMEM;
  540         nbp->nbp_paddr = snb;
  541         sin = snb->snb_addrin;
  542         getnanotime(&ts1);
  543         error = nb_connect_in(nbp, &sin, td);
  544         if (error)
  545                 return error;
  546         getnanotime(&ts2);
  547         timespecsub(&ts2, &ts1);
  548         if (ts2.tv_sec == 0) {
  549                 ts2.tv_sec = 1;
  550                 ts2.tv_nsec = 0;
  551         }
  552         nbp->nbp_timo = ts2;
  553         timespecadd(&nbp->nbp_timo, &ts2);
  554         timespecadd(&nbp->nbp_timo, &ts2);
  555         timespecadd(&nbp->nbp_timo, &ts2);      /*  * 4 */
  556         error = nbssn_rq_request(nbp, td);
  557         if (error)
  558                 smb_nbst_disconnect(vcp, td);
  559         return error;
  560 }
  561 
  562 static int
  563 smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td)
  564 {
  565         struct nbpcb *nbp = vcp->vc_tdata;
  566         struct socket *so;
  567 
  568         if (nbp == NULL || nbp->nbp_tso == NULL)
  569                 return ENOTCONN;
  570         if ((so = nbp->nbp_tso) != NULL) {
  571                 nbp->nbp_flags &= ~NBF_CONNECTED;
  572                 nbp->nbp_tso = (struct socket *)NULL;
  573                 soshutdown(so, 2);
  574                 soclose(so);
  575         }
  576         if (nbp->nbp_state != NBST_RETARGET) {
  577                 nbp->nbp_state = NBST_CLOSED;
  578         }
  579         return 0;
  580 }
  581 
  582 static int
  583 smb_nbst_send(struct smb_vc *vcp, struct mbuf *m0, struct thread *td)
  584 {
  585         struct nbpcb *nbp = vcp->vc_tdata;
  586         int error;
  587 
  588         if (nbp->nbp_state != NBST_SESSION) {
  589                 error = ENOTCONN;
  590                 goto abort;
  591         }
  592         M_PREPEND(m0, 4, M_WAITOK);
  593         nb_sethdr(m0, NB_SSN_MESSAGE, m_fixhdr(m0) - 4);
  594         error = nb_sosend(nbp->nbp_tso, m0, 0, td);
  595         return error;
  596 abort:
  597         if (m0)
  598                 m_freem(m0);
  599         return error;
  600 }
  601 
  602 
  603 static int
  604 smb_nbst_recv(struct smb_vc *vcp, struct mbuf **mpp, struct thread *td)
  605 {
  606         struct nbpcb *nbp = vcp->vc_tdata;
  607         u_int8_t rpcode;
  608         int error, rplen;
  609 
  610         nbp->nbp_flags |= NBF_RECVLOCK;
  611         error = nbssn_recv(nbp, mpp, &rplen, &rpcode, td);
  612         nbp->nbp_flags &= ~NBF_RECVLOCK;
  613         return error;
  614 }
  615 
  616 static void
  617 smb_nbst_timo(struct smb_vc *vcp)
  618 {
  619         return;
  620 }
  621 
  622 static void
  623 smb_nbst_intr(struct smb_vc *vcp)
  624 {
  625         struct nbpcb *nbp = vcp->vc_tdata;
  626 
  627         if (nbp == NULL || nbp->nbp_tso == NULL)
  628                 return;
  629         sorwakeup(nbp->nbp_tso);
  630         sowwakeup(nbp->nbp_tso);
  631 }
  632 
  633 static int
  634 smb_nbst_getparam(struct smb_vc *vcp, int param, void *data)
  635 {
  636         struct nbpcb *nbp = vcp->vc_tdata;
  637 
  638         switch (param) {
  639             case SMBTP_SNDSZ:
  640                 *(int*)data = nbp->nbp_sndbuf;
  641                 break;
  642             case SMBTP_RCVSZ:
  643                 *(int*)data = nbp->nbp_rcvbuf;
  644                 break;
  645             case SMBTP_TIMEOUT:
  646                 *(struct timespec*)data = nbp->nbp_timo;
  647                 break;
  648             default:
  649                 return EINVAL;
  650         }
  651         return 0;
  652 }
  653 
  654 static int
  655 smb_nbst_setparam(struct smb_vc *vcp, int param, void *data)
  656 {
  657         struct nbpcb *nbp = vcp->vc_tdata;
  658 
  659         switch (param) {
  660             case SMBTP_SELECTID:
  661                 nbp->nbp_selectid = data;
  662                 break;
  663             default:
  664                 return EINVAL;
  665         }
  666         return 0;
  667 }
  668 
  669 /*
  670  * Check for fatal errors
  671  */
  672 static int
  673 smb_nbst_fatal(struct smb_vc *vcp, int error)
  674 {
  675         switch (error) {
  676             case ENOTCONN:
  677             case ENETRESET:
  678             case ECONNABORTED:
  679                 return 1;
  680         }
  681         return 0;
  682 }
  683 
  684 
  685 struct smb_tran_desc smb_tran_nbtcp_desc = {
  686         SMBT_NBTCP,
  687         smb_nbst_create, smb_nbst_done,
  688         smb_nbst_bind, smb_nbst_connect, smb_nbst_disconnect,
  689         smb_nbst_send, smb_nbst_recv,
  690         smb_nbst_timo, smb_nbst_intr,
  691         smb_nbst_getparam, smb_nbst_setparam,
  692         smb_nbst_fatal
  693 };
  694 

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