681 lines
16 KiB
C
681 lines
16 KiB
C
/* $NetBSD: smb_trantcp.c,v 1.50 2018/09/03 16:29:36 riastradh Exp $ */
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/*-
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* Copyright (c) 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 2000-2001 Boris Popov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Boris Popov.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* FreeBSD: src/sys/netsmb/smb_trantcp.c,v 1.17 2003/02/19 05:47:38 imp Exp
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: smb_trantcp.c,v 1.50 2018/09/03 16:29:36 riastradh Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/kmem.h>
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#include <sys/mbuf.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/poll.h>
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#include <sys/uio.h>
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#include <sys/select.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <netsmb/mchain.h>
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#include <netsmb/netbios.h>
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#include <netsmb/smb.h>
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#include <netsmb/smb_conn.h>
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#include <netsmb/smb_tran.h>
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#include <netsmb/smb_trantcp.h>
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#include <netsmb/smb_subr.h>
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static int nb_tcpsndbuf = NB_SNDQ;
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static int nb_tcprcvbuf = NB_RCVQ;
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#define nb_sosend(so,m,flags,l) (*(so)->so_send)(so, NULL, (struct uio *)0, \
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m, (struct mbuf *)0, flags, l)
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static int nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
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u_int8_t *rpcodep, bool firstwait, struct lwp *l);
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static int smb_nbst_disconnect(struct smb_vc *vcp, struct lwp *l);
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static int
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nb_setsockopt_int(struct socket *so, int level, int name, int val)
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{
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return so_setsockopt(NULL, so, level, name, &val, sizeof(val)); /* XXX */
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}
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static int
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nb_intr(struct nbpcb *nbp, struct lwp *l)
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{
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return 0;
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}
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static void
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nb_upcall(struct socket *so, void *arg, int events, int waitflag)
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{
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struct nbpcb *nbp = (void *)arg;
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if (arg == NULL || nbp->nbp_selectid == NULL)
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return;
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wakeup(nbp->nbp_selectid);
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}
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static int
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nb_sethdr(struct mbuf *m, u_int8_t type, u_int32_t len)
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{
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u_int32_t *p = mtod(m, u_int32_t *);
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*p = htonl((len & 0x1FFFF) | (type << 24));
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return 0;
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}
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static int
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nb_put_name(struct mbchain *mbp, struct sockaddr_nb *snb)
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{
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int error;
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u_char seglen, *cp;
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cp = snb->snb_name;
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if (*cp == 0)
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return EINVAL;
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NBDEBUG(("[%s]\n", cp));
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for (;;) {
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seglen = (*cp) + 1;
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error = mb_put_mem(mbp, cp, seglen, MB_MSYSTEM);
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if (error)
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return error;
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if (seglen == 1)
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break;
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cp += seglen;
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}
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return 0;
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}
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static int
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nb_connect_in(struct nbpcb *nbp, struct sockaddr_in *to, struct lwp *l)
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{
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struct socket *so;
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int error;
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error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP, l, NULL);
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if (error)
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return error;
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solock(so);
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nbp->nbp_tso = so;
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so->so_upcallarg = (void *)nbp;
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so->so_upcall = nb_upcall;
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so->so_rcv.sb_flags |= SB_UPCALL;
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so->so_rcv.sb_flags &= ~SB_NOINTR;
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so->so_snd.sb_flags &= ~SB_NOINTR;
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so->so_rcv.sb_timeo = NB_RCVTIMEO * hz;
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so->so_snd.sb_timeo = NB_RCVTIMEO * hz;
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error = soreserve(so, nb_tcpsndbuf, nb_tcprcvbuf);
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sounlock(so);
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if (error)
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goto bad;
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nb_setsockopt_int(so, SOL_SOCKET, SO_KEEPALIVE, 1);
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nb_setsockopt_int(so, IPPROTO_TCP, TCP_NODELAY, 1);
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solock(so);
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error = soconnect(so, (struct sockaddr *)to, l);
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if (error) {
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sounlock(so);
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goto bad;
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}
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while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
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sowait(so, false, 2 * hz);
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if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 &&
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(error = nb_intr(nbp, l)) != 0) {
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so->so_state &= ~SS_ISCONNECTING;
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sounlock(so);
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goto bad;
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}
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}
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if (so->so_error) {
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error = so->so_error;
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so->so_error = 0;
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sounlock(so);
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goto bad;
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}
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sounlock(so);
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return 0;
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bad:
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smb_nbst_disconnect(nbp->nbp_vc, l);
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return error;
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}
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static int
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nbssn_rq_request(struct nbpcb *nbp, struct lwp *l)
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{
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struct mbchain mb, *mbp = &mb;
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struct mdchain md, *mdp = &md;
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struct mbuf *m0;
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struct sockaddr_in sin;
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u_short port;
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u_int8_t rpcode;
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int error, rplen;
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error = mb_init(mbp);
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if (error)
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return error;
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mb_put_uint32le(mbp, 0);
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(void) nb_put_name(mbp, nbp->nbp_paddr);
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(void) nb_put_name(mbp, nbp->nbp_laddr);
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nb_sethdr(mbp->mb_top, NB_SSN_REQUEST, mb_fixhdr(mbp) - 4);
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error = nb_sosend(nbp->nbp_tso, mbp->mb_top, 0, l);
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if (!error) {
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nbp->nbp_state = NBST_RQSENT;
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}
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mb_detach(mbp);
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mb_done(mbp);
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if (error)
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return error;
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error = nbssn_recv(nbp, &m0, &rplen, &rpcode, true, l);
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if (error) {
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if (error == EWOULDBLOCK) { /* Timeout */
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NBDEBUG(("initial request timeout\n"));
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return ETIMEDOUT;
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}
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NBDEBUG(("recv() error %d\n", error));
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return error;
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}
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/*
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* Process NETBIOS reply
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*/
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if (m0)
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md_initm(mdp, m0);
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error = 0;
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do {
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if (rpcode == NB_SSN_POSRESP) {
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nbp->nbp_state = NBST_SESSION;
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nbp->nbp_flags |= NBF_CONNECTED;
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break;
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}
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if (rpcode != NB_SSN_RTGRESP) {
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error = ECONNABORTED;
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break;
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}
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if (rplen != 6) {
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error = ECONNABORTED;
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break;
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}
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md_get_mem(mdp, (void *)&sin.sin_addr, 4, MB_MSYSTEM);
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md_get_uint16(mdp, &port);
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sin.sin_port = port;
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nbp->nbp_state = NBST_RETARGET;
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smb_nbst_disconnect(nbp->nbp_vc, l);
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error = nb_connect_in(nbp, &sin, l);
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if (!error)
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error = nbssn_rq_request(nbp, l);
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if (error) {
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smb_nbst_disconnect(nbp->nbp_vc, l);
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break;
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}
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} while(0);
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if (m0)
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md_done(mdp);
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return error;
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}
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static int
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nbssn_recvhdr(struct nbpcb *nbp, int *lenp,
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u_int8_t *rpcodep, int flags, struct lwp *l)
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{
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struct socket *so = nbp->nbp_tso;
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struct uio auio;
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struct iovec aio;
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u_int32_t len;
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int error;
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aio.iov_base = (void *)&len;
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aio.iov_len = sizeof(len);
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auio.uio_iov = &aio;
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auio.uio_iovcnt = 1;
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auio.uio_rw = UIO_READ;
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auio.uio_offset = 0;
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auio.uio_resid = sizeof(len);
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UIO_SETUP_SYSSPACE(&auio);
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error = (*so->so_receive)(so, NULL, &auio, NULL, NULL, &flags);
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if (error)
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return error;
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if (auio.uio_resid > 0) {
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SMBSDEBUG(("short reply\n"));
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return EPIPE;
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}
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len = ntohl(len);
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*rpcodep = (len >> 24) & 0xFF;
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len &= 0x1ffff;
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if (len > SMB_MAXPKTLEN) {
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SMBERROR(("packet too long (%d)\n", len));
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return EFBIG;
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}
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*lenp = len;
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return 0;
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}
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static int
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nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
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u_int8_t *rpcodep, bool dowait, struct lwp *l)
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{
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struct socket *so = nbp->nbp_tso;
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struct uio auio;
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struct mbuf *m, *tm, *im;
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u_int8_t rpcode;
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int len, resid;
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int error, rcvflg;
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len = 0; /* XXX gcc */
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rpcode = 0; /* XXX gcc */
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if (so == NULL)
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return ENOTCONN;
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if (mpp)
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*mpp = NULL;
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m = NULL;
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for(;; dowait = false) {
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/*
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* Poll for a response header.
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* If we don't have one waiting, return.
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*/
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error = nbssn_recvhdr(nbp, &len, &rpcode,
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dowait ? 0 : MSG_DONTWAIT, l);
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if (so->so_state &
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(SS_ISDISCONNECTING | SS_ISDISCONNECTED | SS_CANTRCVMORE)) {
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nbp->nbp_state = NBST_CLOSED;
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NBDEBUG(("session closed by peer\n"));
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return ECONNRESET;
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}
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if (error)
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return error;
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if (len == 0 && nbp->nbp_state != NBST_SESSION)
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break;
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/* no data, try again */
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if (rpcode == NB_SSN_KEEPALIVE)
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continue;
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/*
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* Loop, blocking, for data following the response header.
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*
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* Note that we can't simply block here with MSG_WAITALL for the
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* entire response size, as it may be larger than the TCP
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* slow-start window that the sender employs. This will result
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* in the sender stalling until the delayed ACK is sent, then
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* resuming slow-start, resulting in very poor performance.
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*
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* Instead, we never request more than NB_SORECEIVE_CHUNK
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* bytes at a time, resulting in an ack being pushed by
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* the TCP code at the completion of each call.
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*/
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resid = len;
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while (resid > 0) {
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tm = NULL;
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rcvflg = MSG_WAITALL;
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memset(&auio, 0, sizeof(auio));
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auio.uio_resid = uimin(resid, NB_SORECEIVE_CHUNK);
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/* not need to setup uio_vmspace */
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resid -= auio.uio_resid;
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/*
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* Spin until we have collected everything in
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* this chunk.
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*/
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do {
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rcvflg = MSG_WAITALL;
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error = (*so->so_receive)(so, NULL, &auio, &tm,
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NULL, &rcvflg);
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} while (error == EWOULDBLOCK || error == EINTR ||
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error == ERESTART);
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if (error)
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goto out;
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/* short return guarantees unhappiness */
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if (auio.uio_resid > 0) {
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SMBERROR(("packet is shorter than expected\n"));
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error = EPIPE;
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goto out;
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}
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/* append received chunk to previous chunk(s) */
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if (m == NULL) {
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m = tm;
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} else {
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/*
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* Just glue the new chain on the end.
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* Consumer will pullup as required.
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*/
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for (im = m; im->m_next != NULL; im = im->m_next)
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;
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im->m_next = tm;
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}
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}
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/* got a session/message packet? */
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if (nbp->nbp_state == NBST_SESSION &&
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rpcode == NB_SSN_MESSAGE)
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break;
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/* drop packet and try for another */
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NBDEBUG(("non-session packet %x\n", rpcode));
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if (m) {
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m_freem(m);
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m = NULL;
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}
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}
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out:
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if (error) {
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if (m)
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m_freem(m);
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return error;
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}
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if (mpp)
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*mpp = m;
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else
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m_freem(m);
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*lenp = len;
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*rpcodep = rpcode;
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return 0;
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}
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/*
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* SMB transport interface
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*/
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static int
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smb_nbst_create(struct smb_vc *vcp, struct lwp *l)
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{
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struct nbpcb *nbp;
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nbp = kmem_zalloc(sizeof(*nbp), KM_SLEEP);
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nbp->nbp_state = NBST_CLOSED;
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nbp->nbp_vc = vcp;
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vcp->vc_tdata = nbp;
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return 0;
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}
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static int
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smb_nbst_done(struct smb_vc *vcp, struct lwp *l)
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{
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struct nbpcb *nbp = vcp->vc_tdata;
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if (nbp == NULL)
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return ENOTCONN;
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smb_nbst_disconnect(vcp, l);
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if (nbp->nbp_laddr)
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free(nbp->nbp_laddr, M_SONAME);
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if (nbp->nbp_paddr)
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free(nbp->nbp_paddr, M_SONAME);
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kmem_free(nbp, sizeof(*nbp));
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return 0;
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}
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static int
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smb_nbst_bind(struct smb_vc *vcp, struct sockaddr *sap, struct lwp *l)
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{
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struct nbpcb *nbp = vcp->vc_tdata;
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struct sockaddr_nb *snb;
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int error, slen;
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NBDEBUG(("\n"));
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error = EINVAL;
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do {
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if (nbp->nbp_flags & NBF_LOCADDR)
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break;
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/*
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* It is possible to create NETBIOS name in the kernel,
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* but nothing prevents us to do it in the user space.
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*/
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if (sap == NULL)
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break;
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slen = sap->sa_len;
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if (slen < NB_MINSALEN)
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break;
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snb = (struct sockaddr_nb*)dup_sockaddr(sap, 1);
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if (snb == NULL) {
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error = ENOMEM;
|
|
break;
|
|
}
|
|
nbp->nbp_laddr = snb;
|
|
nbp->nbp_flags |= NBF_LOCADDR;
|
|
error = 0;
|
|
} while(0);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
smb_nbst_connect(struct smb_vc *vcp, struct sockaddr *sap, struct lwp *l)
|
|
{
|
|
struct nbpcb *nbp = vcp->vc_tdata;
|
|
struct sockaddr_in sin;
|
|
struct sockaddr_nb *snb;
|
|
int error, slen;
|
|
|
|
NBDEBUG(("\n"));
|
|
if (nbp->nbp_tso != NULL)
|
|
return EISCONN;
|
|
if (nbp->nbp_laddr == NULL)
|
|
return EINVAL;
|
|
slen = sap->sa_len;
|
|
if (slen < NB_MINSALEN)
|
|
return EINVAL;
|
|
if (nbp->nbp_paddr) {
|
|
free(nbp->nbp_paddr, M_SONAME);
|
|
nbp->nbp_paddr = NULL;
|
|
}
|
|
snb = (struct sockaddr_nb*)dup_sockaddr(sap, 1);
|
|
if (snb == NULL)
|
|
return ENOMEM;
|
|
nbp->nbp_paddr = snb;
|
|
sin = snb->snb_addrin;
|
|
error = nb_connect_in(nbp, &sin, l);
|
|
if (error)
|
|
return error;
|
|
error = nbssn_rq_request(nbp, l);
|
|
if (error)
|
|
smb_nbst_disconnect(vcp, l);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
smb_nbst_disconnect(struct smb_vc *vcp, struct lwp *l)
|
|
{
|
|
struct nbpcb *nbp = vcp->vc_tdata;
|
|
struct socket *so;
|
|
|
|
if (nbp == NULL || nbp->nbp_tso == NULL)
|
|
return ENOTCONN;
|
|
if ((so = nbp->nbp_tso) != NULL) {
|
|
nbp->nbp_flags &= ~NBF_CONNECTED;
|
|
nbp->nbp_tso = NULL;
|
|
solock(so);
|
|
soshutdown(so, 2);
|
|
sounlock(so);
|
|
soclose(so);
|
|
}
|
|
if (nbp->nbp_state != NBST_RETARGET) {
|
|
nbp->nbp_state = NBST_CLOSED;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
smb_nbst_send(struct smb_vc *vcp, struct mbuf *m0, struct lwp *l)
|
|
{
|
|
struct nbpcb *nbp = vcp->vc_tdata;
|
|
int error;
|
|
|
|
if (nbp->nbp_state != NBST_SESSION) {
|
|
error = ENOTCONN;
|
|
goto abort;
|
|
}
|
|
M_PREPEND(m0, 4, M_WAITOK);
|
|
if (m0 == NULL)
|
|
return ENOBUFS;
|
|
nb_sethdr(m0, NB_SSN_MESSAGE, m_fixhdr(m0) - 4);
|
|
error = nb_sosend(nbp->nbp_tso, m0, 0, l);
|
|
return error;
|
|
abort:
|
|
if (m0)
|
|
m_freem(m0);
|
|
return error;
|
|
}
|
|
|
|
|
|
static int
|
|
smb_nbst_recv(struct smb_vc *vcp, struct mbuf **mpp, struct lwp *l)
|
|
{
|
|
struct nbpcb *nbp = vcp->vc_tdata;
|
|
u_int8_t rpcode;
|
|
int error, rplen;
|
|
|
|
nbp->nbp_flags |= NBF_RECVLOCK;
|
|
error = nbssn_recv(nbp, mpp, &rplen, &rpcode, false, l);
|
|
nbp->nbp_flags &= ~NBF_RECVLOCK;
|
|
return error;
|
|
}
|
|
|
|
static void
|
|
smb_nbst_timo(struct smb_vc *vcp)
|
|
{
|
|
|
|
/* Nothing */
|
|
}
|
|
|
|
static void
|
|
smb_nbst_intr(struct smb_vc *vcp)
|
|
{
|
|
struct nbpcb *nbp = vcp->vc_tdata;
|
|
struct socket *so;
|
|
|
|
if (nbp == NULL || (so = nbp->nbp_tso) == NULL)
|
|
return;
|
|
|
|
solock(so);
|
|
sorwakeup(so);
|
|
sowwakeup(so);
|
|
sounlock(so);
|
|
}
|
|
|
|
static int
|
|
smb_nbst_getparam(struct smb_vc *vcp, int param, void *data)
|
|
{
|
|
struct timeval *tvp;
|
|
switch (param) {
|
|
case SMBTP_SNDSZ:
|
|
*(int*)data = nb_tcpsndbuf;
|
|
break;
|
|
case SMBTP_RCVSZ:
|
|
*(int*)data = nb_tcprcvbuf;
|
|
break;
|
|
case SMBTP_TIMEOUT:
|
|
tvp = (struct timeval *)data;
|
|
tvp->tv_sec = NB_RCVTIMEO;
|
|
tvp->tv_usec = 0;
|
|
break;
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
smb_nbst_setparam(struct smb_vc *vcp, int param, void *data)
|
|
{
|
|
struct nbpcb *nbp = vcp->vc_tdata;
|
|
|
|
switch (param) {
|
|
case SMBTP_SELECTID:
|
|
nbp->nbp_selectid = data;
|
|
break;
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Check for fatal errors
|
|
*/
|
|
static int
|
|
smb_nbst_fatal(struct smb_vc *vcp, int error)
|
|
{
|
|
switch (error) {
|
|
case ENOTCONN:
|
|
case ENETRESET:
|
|
case ECONNABORTED:
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
struct smb_tran_desc smb_tran_nbtcp_desc = {
|
|
SMBT_NBTCP,
|
|
smb_nbst_create, smb_nbst_done,
|
|
smb_nbst_bind, smb_nbst_connect, smb_nbst_disconnect,
|
|
smb_nbst_send, smb_nbst_recv,
|
|
smb_nbst_timo, smb_nbst_intr,
|
|
smb_nbst_getparam, smb_nbst_setparam,
|
|
smb_nbst_fatal,
|
|
{ NULL, NULL },
|
|
};
|