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NetBSD/sys/netsmb/smb_trantcp.c

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/* $NetBSD: smb_trantcp.c,v 1.2 2001/11/13 01:04:47 lukem Exp $ */
/*
* Copyright (c) 2000, Boris Popov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Boris Popov.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: smb_trantcp.c,v 1.2 2001/11/13 01:04:47 lukem Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/proc.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/poll.h>
#include <sys/uio.h>
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/subr_mbuf.h>
#include <netsmb/netbios.h>
#include <netsmb/smb.h>
#include <netsmb/smb_conn.h>
#include <netsmb/smb_tran.h>
#include <netsmb/smb_trantcp.h>
#include <netsmb/smb_subr.h>
#define M_NBDATA M_PCB
static int smb_tcpsndbuf = 10 * 1024;
static int smb_tcprcvbuf = 10 * 1024;
#ifdef SYSCTL_DECL
SYSCTL_DECL(_net_smb);
#endif
#ifndef NetBSD
SYSCTL_INT(_net_smb, OID_AUTO, tcpsndbuf, CTLFLAG_RW, &smb_tcpsndbuf, 0, "");
SYSCTL_INT(_net_smb, OID_AUTO, tcprcvbuf, CTLFLAG_RW, &smb_tcprcvbuf, 0, "");
#endif
#ifndef NetBSD
#define nb_sosend(so,m,flags,p) (so)->so_proto->pr_usrreqs->pru_sosend( \
so, NULL, 0, m, 0, flags, p)
#else
#if 0
#define nb_sosend(so,m,flags,p) (*(so)->so_proto->pr_usrreq)(so, PRU_SEND, \
m, (struct mbuf *)0, (struct mbuf *)0, p)
#endif
#define nb_sosend(so,m,flags,p) (*so->so_send)(so, NULL, (struct uio *)0, m, \
(struct mbuf *)0, flags)
#endif
static int nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
u_int8_t *rpcodep, struct proc *p);
static int smb_nbst_disconnect(struct smb_vc *vcp, struct proc *p);
static int
nb_setsockopt_int(struct socket *so, int level, int name, int val)
{
#ifndef NetBSD
struct sockopt sopt;
bzero(&sopt, sizeof(sopt));
sopt.sopt_level = level;
sopt.sopt_name = name;
sopt.sopt_val = &val;
sopt.sopt_valsize = sizeof(val);
return sosetopt(so, &sopt);
#else
struct mbuf *m;
MGET(m, M_WAIT, MT_SOOPTS);
*mtod(m, int *) = val;
m->m_len = sizeof(int);
return sosetopt(so, level, name, m);
#endif
}
static __inline int
nb_poll(struct nbpcb *nbp, int events, struct proc *p)
{
#ifndef NetBSD
return nbp->nbp_tso->so_proto->pr_usrreqs->pru_sopoll(nbp->nbp_tso,
events, NULL, p);
#else
register struct socket *so = nbp->nbp_tso;
int revents = 0;
register int s = splsoftnet();
if (events & (POLLIN | POLLRDNORM))
if (soreadable(so))
revents |= events & (POLLIN | POLLRDNORM);
if (events & (POLLOUT | POLLWRNORM))
if (sowriteable(so))
revents |= events & (POLLOUT | POLLWRNORM);
if (events & (POLLPRI | POLLRDBAND))
if (so->so_oobmark || (so->so_state & SS_RCVATMARK))
revents |= events & (POLLPRI | POLLRDBAND);
if (revents == 0) {
if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) {
selrecord(p, &so->so_rcv.sb_sel);
so->so_rcv.sb_flags |= SB_SEL;
}
if (events & (POLLOUT | POLLWRNORM)) {
selrecord(p, &so->so_snd.sb_sel);
so->so_snd.sb_flags |= SB_SEL;
}
}
splx(s);
return (revents);
#endif
}
static int
nbssn_rselect(struct nbpcb *nbp, struct timeval *tv, int events, struct proc *p)
{
#ifndef NetBSD
struct timeval atv, rtv, ttv;
int s, timo, error;
if (tv) {
atv = *tv;
if (itimerfix(&atv)) {
error = EINVAL;
goto done;
}
getmicrouptime(&rtv);
timevaladd(&atv, &rtv);
}
timo = 0;
retry:
p->p_flag |= P_SELECT;
error = nb_poll(nbp, events, p);
if (error) {
error = 0;
goto done;
}
if (tv) {
getmicrouptime(&rtv);
if (timevalcmp(&rtv, &atv, >=))
goto done;
ttv = atv;
timevalsub(&ttv, &rtv);
timo = tvtohz(&ttv);
}
s = splhigh();
if ((p->p_flag & P_SELECT) == 0) {
splx(s);
goto retry;
}
p->p_flag &= ~P_SELECT;
error = tsleep((caddr_t)&selwait, PSOCK, "nbsel", timo);
splx(s);
done:
p->p_flag &= ~P_SELECT;
if (error == ERESTART)
return 0;
return error;
#else
struct timeval atv;
int s, timo, error;
if (tv) {
atv = *tv;
if (itimerfix(&atv)) {
error = EINVAL;
goto done;
}
s = splclock();
timeradd(&atv, &time, &atv);
timo = hzto(&atv);
if (timo == 0)
timo = 1;
splx(s);
} else
timo = 0;
retry:
p->p_flag |= P_SELECT;
error = nb_poll(nbp, events, p);
if (error) {
error = 0;
goto done;
}
s = splhigh();
if (timo && timercmp(&time, &atv, >=)) {
splx(s);
goto done;
}
if ((p->p_flag & P_SELECT) == 0) {
splx(s);
goto retry;
}
p->p_flag &= ~P_SELECT;
error = tsleep((caddr_t)&selwait, PSOCK, "nbsel", timo);
splx(s);
done:
p->p_flag &= ~P_SELECT;
if (error == ERESTART)
return 0;
return error;
#endif
}
static int
nb_intr(struct nbpcb *nbp, struct proc *p)
{
return 0;
}
static int
nb_sethdr(struct mbuf *m, u_int8_t type, u_int32_t len)
{
u_int32_t *p = mtod(m, u_int32_t *);
*p = htonl((len & 0x1FFFF) | (type << 24));
return 0;
}
static int
nb_put_name(struct mbdata *mbp, struct sockaddr_nb *snb)
{
int error;
u_char seglen, *cp;
cp = snb->snb_name;
if (*cp == 0)
return EINVAL;
NBDEBUG("[%s]\n", cp);
for (;;) {
seglen = (*cp) + 1;
error = mb_put_mem(mbp, cp, seglen, MB_MSYSTEM);
if (error)
return error;
if (seglen == 1)
break;
cp += seglen;
}
return 0;
}
static int
nb_connect_in(struct nbpcb *nbp, struct sockaddr_in *to, struct proc *p)
{
struct socket *so;
int error, s;
#ifdef NetBSD
struct mbuf *m;
#endif
#ifndef NetBSD
error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP, p);
#else
error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP);
#endif
if (error)
return error;
nbp->nbp_tso = so;
so->so_rcv.sb_timeo = (5 * hz);
so->so_snd.sb_timeo = (5 * hz);
error = soreserve(so, nbp->nbp_sndbuf, nbp->nbp_rcvbuf);
if (error)
goto bad;
nb_setsockopt_int(so, SOL_SOCKET, SO_KEEPALIVE, 1);
nb_setsockopt_int(so, IPPROTO_TCP, TCP_NODELAY, 1);
so->so_rcv.sb_flags &= ~SB_NOINTR;
so->so_snd.sb_flags &= ~SB_NOINTR;
#ifndef NetBSD
error = soconnect(so, (struct sockaddr*)to, p);
#else
MGET(m, M_WAIT, MT_SONAME);
*mtod(m, struct sockaddr *) = *(struct sockaddr*)to;
m->m_len = sizeof(struct sockaddr);
error = soconnect(so, m);
m_free(m);
#endif
if (error)
goto bad;
s = splnet();
while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
tsleep(&so->so_timeo, PSOCK, "nbcon", 2 * hz);
if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 &&
(error = nb_intr(nbp, p)) != 0) {
so->so_state &= ~SS_ISCONNECTING;
splx(s);
goto bad;
}
}
if (so->so_error) {
error = so->so_error;
so->so_error = 0;
splx(s);
goto bad;
}
splx(s);
return 0;
bad:
smb_nbst_disconnect(nbp->nbp_vc, p);
return error;
}
static int
nbssn_rq_request(struct nbpcb *nbp, struct proc *p)
{
struct mbdata mb, *mbp = &mb;
struct mbuf *m0;
struct timeval tv;
struct sockaddr_in sin;
u_short port;
u_int8_t rpcode;
int error, rplen;
error = mb_init(mbp);
if (error)
return error;
mb_put_dwordle(mbp, 0);
nb_put_name(mbp, nbp->nbp_paddr);
nb_put_name(mbp, nbp->nbp_laddr);
nb_sethdr(mbp->mb_top, NB_SSN_REQUEST, mb_fixhdr(mbp) - 4);
error = nb_sosend(nbp->nbp_tso, mbp->mb_top, 0, p);
if (!error) {
nbp->nbp_state = NBST_RQSENT;
}
mbp->mb_top = NULL;
mb_done(mbp);
if (error)
return error;
tv.tv_sec = nbp->nbp_timo;
tv.tv_usec = 0;
error = nbssn_rselect(nbp, &tv, POLLIN, p);
if (error == EWOULDBLOCK) { /* Timeout */
NBDEBUG("initial request timeout\n");
return ETIMEDOUT;
}
if (error) /* restart or interrupt */
return error;
error = nbssn_recv(nbp, &m0, &rplen, &rpcode, p);
if (error) {
NBDEBUG("recv() error %d\n", error);
return error;
}
/*
* Process NETBIOS reply
*/
if (m0)
mb_initm(mbp, m0);
error = 0;
do {
if (rpcode == NB_SSN_POSRESP) {
nbp->nbp_state = NBST_SESSION;
nbp->nbp_flags |= NBF_CONNECTED;
break;
}
if (rpcode != NB_SSN_RTGRESP) {
error = ECONNABORTED;
break;
}
if (rplen != 6) {
error = ECONNABORTED;
break;
}
mb_get_mem(mbp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM);
mb_get_word(mbp, &port);
sin.sin_port = port;
nbp->nbp_state = NBST_RETARGET;
smb_nbst_disconnect(nbp->nbp_vc, p);
error = nb_connect_in(nbp, &sin, p);
if (!error)
error = nbssn_rq_request(nbp, p);
if (error) {
smb_nbst_disconnect(nbp->nbp_vc, p);
break;
}
} while(0);
mb_done(mbp);
return error;
}
static int
nbssn_recvhdr(struct nbpcb *nbp, int *lenp,
u_int8_t *rpcodep, int flags, struct proc *p)
{
struct socket *so = nbp->nbp_tso;
struct uio auio;
struct iovec aio;
u_int32_t len;
int error;
aio.iov_base = (caddr_t)&len;
aio.iov_len = sizeof(len);
auio.uio_iov = &aio;
auio.uio_iovcnt = 1;
auio.uio_segflg = UIO_SYSSPACE;
auio.uio_rw = UIO_READ;
auio.uio_offset = 0;
auio.uio_resid = sizeof(len);
auio.uio_procp = p;
#ifndef NetBSD
error = so->so_proto->pr_usrreqs->pru_soreceive
(so, (struct sockaddr **)NULL, &auio,
(struct mbuf **)NULL, (struct mbuf **)NULL, &flags);
#else
error = (*so->so_receive)(so, (struct mbuf **)0, &auio,
(struct mbuf **)NULL, (struct mbuf **)NULL, &flags);
#endif
if (error)
return error;
if (auio.uio_resid > 0) {
SMBSDEBUG("short reply\n");
return EPIPE;
}
len = ntohl(len);
*rpcodep = (len >> 24) & 0xFF;
len &= 0x1ffff;
if (len > SMB_MAXPKTLEN) {
SMBERROR("packet too long (%d)\n", len);
return EFBIG;
}
*lenp = len;
return 0;
}
static int
nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
u_int8_t *rpcodep, struct proc *p)
{
struct socket *so = nbp->nbp_tso;
struct uio auio;
struct mbuf *m;
u_int8_t rpcode;
int len;
int error, rcvflg;
if (so == NULL)
return ENOTCONN;
if (mpp)
*mpp = NULL;
for(;;) {
m = NULL;
error = nbssn_recvhdr(nbp, &len, &rpcode, MSG_WAITALL, p);
if (so->so_state &
(SS_ISDISCONNECTING | SS_ISDISCONNECTED | SS_CANTRCVMORE)) {
nbp->nbp_state = NBST_CLOSED;
NBDEBUG("session closed by peer\n");
return ECONNRESET;
}
if (error)
return error;
if (len == 0 && nbp->nbp_state != NBST_SESSION)
break;
bzero(&auio, sizeof(auio));
auio.uio_resid = len;
auio.uio_procp = p;
do {
rcvflg = MSG_WAITALL;
#ifndef NetBSD
error = so->so_proto->pr_usrreqs->pru_soreceive
(so, (struct sockaddr **)NULL,
&auio, &m, (struct mbuf **)NULL, &rcvflg);
#else
error = (*so->so_receive)(so, (struct mbuf **)0,
&auio, &m, (struct mbuf **)NULL, &rcvflg);
#endif
} while (error == EWOULDBLOCK || error == EINTR ||
error == ERESTART);
if (error)
break;
if (auio.uio_resid > 0) {
SMBERROR("packet is shorter than expected\n");
error = EPIPE;
break;
}
if (nbp->nbp_state == NBST_SESSION &&
rpcode == NB_SSN_MESSAGE)
break;
NBDEBUG("non-session packet %x\n", rpcode);
if (m)
m_freem(m);
}
if (error) {
if (m)
m_freem(m);
return error;
}
if (mpp)
*mpp = m;
else
m_freem(m);
*lenp = len;
*rpcodep = rpcode;
return 0;
}
int
nb_dupsockaddr(struct sockaddr_nb *src, struct sockaddr_nb **dst)
{
struct sockaddr_nb *snb;
snb = (struct sockaddr_nb*)dup_sockaddr((struct sockaddr*)src, 1);
if (snb == NULL)
return ENOMEM;
*dst = snb;
return 0;
}
/*
* SMB transport interface
*/
static int
smb_nbst_create(struct smb_vc *vcp, struct proc *p)
{
struct nbpcb *nbp;
MALLOC(nbp, struct nbpcb *, sizeof *nbp, M_NBDATA, M_WAITOK);
if (nbp == NULL)
return ENOBUFS;
bzero(nbp, sizeof *nbp);
nbp->nbp_timo = 5; /* XXX: sysctl ? */
nbp->nbp_state = NBST_CLOSED;
nbp->nbp_vc = vcp;
nbp->nbp_sndbuf = smb_tcpsndbuf;
nbp->nbp_rcvbuf = smb_tcprcvbuf;
vcp->vc_tdata = nbp;
return 0;
}
static int
smb_nbst_done(struct smb_vc *vcp, struct proc *p)
{
struct nbpcb *nbp = vcp->vc_tdata;
if (nbp == NULL)
return ENOTCONN;
smb_nbst_disconnect(vcp, p);
if (nbp->nbp_laddr)
free(nbp->nbp_laddr, M_SONAME);
if (nbp->nbp_paddr)
free(nbp->nbp_paddr, M_SONAME);
free(nbp, M_NBDATA);
return 0;
}
static int
smb_nbst_bind(struct smb_vc *vcp, struct sockaddr *sap, struct proc *p)
{
struct nbpcb *nbp = vcp->vc_tdata;
struct sockaddr_nb *snb;
int error, slen;
NBDEBUG("\n");
error = EINVAL;
do {
if (nbp->nbp_flags & NBF_LOCADDR)
break;
/*
* It is possible to create NETBIOS name in the kernel,
* but nothing prevents us to do it in the user space.
*/
if (sap == NULL)
break;
slen = sap->sa_len;
if (slen < NB_MINSALEN)
break;
error = nb_dupsockaddr((struct sockaddr_nb *)sap, &snb);
if (error)
break;
nbp->nbp_laddr = snb;
nbp->nbp_flags |= NBF_LOCADDR;
} while(0);
return error;
}
static int
smb_nbst_connect(struct smb_vc *vcp, struct sockaddr *sap, struct proc *p)
{
struct nbpcb *nbp = vcp->vc_tdata;
struct sockaddr_in sin;
struct sockaddr_nb *snb;
int error, slen, rtt;
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;
}
error = nb_dupsockaddr((struct sockaddr_nb *)sap, &snb);
if (error)
return error;
nbp->nbp_paddr = snb;
sin = snb->snb_addrin;
nbp->nbp_rtt = 0;
error = nb_connect_in(nbp, &sin, p);
if (error)
return error;
rtt = nbp->nbp_rtt ? nbp->nbp_rtt : 1;
nbp->nbp_timo = rtt * 4; /* emperic value ... */
error = nbssn_rq_request(nbp, p);
if (error)
smb_nbst_disconnect(vcp, p);
return error;
}
static int
smb_nbst_disconnect(struct smb_vc *vcp, struct proc *p)
{
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 = (struct socket *)NULL;
soshutdown(so, 2);
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 proc *p)
{
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, p);
return error;
abort:
if (m0)
m_freem(m0);
return error;
}
static int
smb_nbst_recv(struct smb_vc *vcp, struct mbuf **mpp, struct proc *p)
{
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, p);
nbp->nbp_flags &= ~NBF_RECVLOCK;
return error;
}
static void
smb_nbst_timo(struct smb_vc *vcp)
{
struct nbpcb *nbp = vcp->vc_tdata;
struct proc *p = curproc; /* XXX */
u_int8_t rpcode;
int len;
int error;
nbp->nbp_rtt++;
if ((nbp->nbp_flags & NBF_RECVLOCK) || nbp->nbp_state != NBST_SESSION)
return;
error = nbssn_recvhdr(nbp, &len, &rpcode, MSG_PEEK | MSG_DONTWAIT, p);
if (error)
return;
if (rpcode == NB_SSN_KEEPALIVE) {
nbssn_recvhdr(nbp, &len, &rpcode, MSG_WAITALL, p);
}
return;
}
static void
smb_nbst_intr(struct smb_vc *vcp)
{
struct nbpcb *nbp = vcp->vc_tdata;
if (nbp == NULL || nbp->nbp_tso == NULL)
return;
sorwakeup(nbp->nbp_tso);
sowwakeup(nbp->nbp_tso);
}
static int
smb_nbst_bufsz(struct smb_vc *vcp, int *sndsz, int *rcvsz)
{
struct nbpcb *nbp = vcp->vc_tdata;
if (sndsz)
*sndsz = nbp->nbp_sndbuf;
if (rcvsz)
*sndsz = nbp->nbp_rcvbuf;
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_bufsz
};
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