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- /*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * Copyright (c) 2000-2001 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.
- *
- * 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>
- __FBSDID("$FreeBSD$");
- #include <sys/param.h>
- #include <sys/condvar.h>
- #include <sys/kernel.h>
- #include <sys/lock.h>
- #include <sys/malloc.h>
- #include <sys/mbuf.h>
- #include <sys/poll.h>
- #include <sys/proc.h>
- #include <sys/protosw.h>
- #include <sys/signalvar.h>
- #include <sys/socket.h>
- #include <sys/socketvar.h>
- #include <sys/sx.h>
- #include <sys/sysctl.h>
- #include <sys/systm.h>
- #include <sys/uio.h>
- #include <net/if.h>
- #include <net/route.h>
- #include <net/vnet.h>
- #include <netinet/in.h>
- #include <netinet/tcp.h>
- #include <sys/mchain.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 = NB_SNDQ - 1;
- static int smb_tcprcvbuf = NB_RCVQ - 1;
- SYSCTL_DECL(_net_smb);
- SYSCTL_INT(_net_smb, OID_AUTO, tcpsndbuf, CTLFLAG_RW, &smb_tcpsndbuf, 0, "");
- SYSCTL_INT(_net_smb, OID_AUTO, tcprcvbuf, CTLFLAG_RW, &smb_tcprcvbuf, 0, "");
- #define nb_sosend(so,m,flags,td) sosend(so, NULL, 0, m, 0, flags, td)
- static int nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
- u_int8_t *rpcodep, struct thread *td);
- static int smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td);
- static int
- nb_setsockopt_int(struct socket *so, int level, int name, int val)
- {
- struct sockopt sopt;
- int error;
- bzero(&sopt, sizeof(sopt));
- sopt.sopt_level = level;
- sopt.sopt_name = name;
- sopt.sopt_val = &val;
- sopt.sopt_valsize = sizeof(val);
- CURVNET_SET(so->so_vnet);
- error = sosetopt(so, &sopt);
- CURVNET_RESTORE();
- return error;
- }
- static int
- nb_intr(struct nbpcb *nbp, struct proc *p)
- {
- return 0;
- }
- static int
- nb_upcall(struct socket *so, void *arg, int waitflag)
- {
- struct nbpcb *nbp = arg;
- if (arg == NULL || nbp->nbp_selectid == NULL)
- return (SU_OK);
- wakeup(nbp->nbp_selectid);
- return (SU_OK);
- }
- 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 mbchain *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 thread *td)
- {
- struct socket *so;
- int error, s;
- error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP,
- td->td_ucred, td);
- if (error)
- return error;
- nbp->nbp_tso = so;
- SOCKBUF_LOCK(&so->so_rcv);
- soupcall_set(so, SO_RCV, nb_upcall, nbp);
- SOCKBUF_UNLOCK(&so->so_rcv);
- so->so_rcv.sb_timeo = (5 * SBT_1S);
- so->so_snd.sb_timeo = (5 * SBT_1S);
- 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);
- SOCKBUF_LOCK(&so->so_rcv);
- so->so_rcv.sb_flags &= ~SB_NOINTR;
- SOCKBUF_UNLOCK(&so->so_rcv);
- SOCKBUF_LOCK(&so->so_snd);
- so->so_snd.sb_flags &= ~SB_NOINTR;
- SOCKBUF_UNLOCK(&so->so_snd);
- error = soconnect(so, (struct sockaddr*)to, td);
- 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, td->td_proc)) != 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, td);
- return error;
- }
- static int
- nbssn_rq_request(struct nbpcb *nbp, struct thread *td)
- {
- struct mbchain *mbp;
- struct mdchain *mdp;
- struct mbuf *m0;
- struct timeval tv;
- struct sockaddr_in sin;
- u_short port;
- u_int8_t rpcode;
- int error, rplen;
- mbp = malloc(sizeof(struct mbchain), M_NBDATA, M_WAITOK);
- mdp = malloc(sizeof(struct mbchain), M_NBDATA, M_WAITOK);
- error = mb_init(mbp);
- if (error) {
- free(mbp, M_NBDATA);
- free(mdp, M_NBDATA);
- return error;
- }
- mb_put_uint32le(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, td);
- if (!error) {
- nbp->nbp_state = NBST_RQSENT;
- }
- mb_detach(mbp);
- mb_done(mbp);
- free(mbp, M_NBDATA);
- if (error) {
- free(mdp, M_NBDATA);
- return error;
- }
- TIMESPEC_TO_TIMEVAL(&tv, &nbp->nbp_timo);
- error = selsocket(nbp->nbp_tso, POLLIN, &tv, td);
- if (error == EWOULDBLOCK) { /* Timeout */
- NBDEBUG("initial request timeout\n");
- free(mdp, M_NBDATA);
- return ETIMEDOUT;
- }
- if (error) { /* restart or interrupt */
- free(mdp, M_NBDATA);
- return error;
- }
- error = nbssn_recv(nbp, &m0, &rplen, &rpcode, td);
- if (error) {
- NBDEBUG("recv() error %d\n", error);
- free(mdp, M_NBDATA);
- return error;
- }
- /*
- * Process NETBIOS reply
- */
- if (m0)
- md_initm(mdp, 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;
- }
- md_get_mem(mdp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM);
- md_get_uint16(mdp, &port);
- sin.sin_port = port;
- nbp->nbp_state = NBST_RETARGET;
- smb_nbst_disconnect(nbp->nbp_vc, td);
- error = nb_connect_in(nbp, &sin, td);
- if (!error)
- error = nbssn_rq_request(nbp, td);
- if (error) {
- smb_nbst_disconnect(nbp->nbp_vc, td);
- break;
- }
- } while(0);
- if (m0)
- md_done(mdp);
- free(mdp, M_NBDATA);
- return error;
- }
- static int
- nbssn_recvhdr(struct nbpcb *nbp, int *lenp,
- u_int8_t *rpcodep, int flags, struct thread *td)
- {
- 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_td = td;
- CURVNET_SET(so->so_vnet);
- error = soreceive(so, (struct sockaddr **)NULL, &auio,
- (struct mbuf **)NULL, (struct mbuf **)NULL, &flags);
- CURVNET_RESTORE();
- 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 thread *td)
- {
- struct socket *so = nbp->nbp_tso;
- struct uio auio;
- struct mbuf *m, *tm, *im;
- u_int8_t rpcode;
- int len, resid;
- int error, rcvflg;
- if (so == NULL)
- return ENOTCONN;
- if (mpp)
- *mpp = NULL;
- m = NULL;
- for(;;) {
- /*
- * Poll for a response header.
- * If we don't have one waiting, return.
- */
- len = 0;
- rpcode = 0;
- error = nbssn_recvhdr(nbp, &len, &rpcode, MSG_DONTWAIT, td);
- if ((so->so_state & (SS_ISDISCONNECTING | SS_ISDISCONNECTED)) ||
- (so->so_rcv.sb_state & SBS_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;
- /* no data, try again */
- if (rpcode == NB_SSN_KEEPALIVE)
- continue;
- /*
- * Loop, blocking, for data following the response header.
- *
- * Note that we can't simply block here with MSG_WAITALL for the
- * entire response size, as it may be larger than the TCP
- * slow-start window that the sender employs. This will result
- * in the sender stalling until the delayed ACK is sent, then
- * resuming slow-start, resulting in very poor performance.
- *
- * Instead, we never request more than NB_SORECEIVE_CHUNK
- * bytes at a time, resulting in an ack being pushed by
- * the TCP code at the completion of each call.
- */
- resid = len;
- while (resid > 0) {
- tm = NULL;
- rcvflg = MSG_WAITALL;
- bzero(&auio, sizeof(auio));
- auio.uio_resid = min(resid, NB_SORECEIVE_CHUNK);
- auio.uio_td = td;
- resid -= auio.uio_resid;
- /*
- * Spin until we have collected everything in
- * this chunk.
- */
- do {
- rcvflg = MSG_WAITALL;
- CURVNET_SET(so->so_vnet);
- error = soreceive(so, (struct sockaddr **)NULL,
- &auio, &tm, (struct mbuf **)NULL, &rcvflg);
- CURVNET_RESTORE();
- } while (error == EWOULDBLOCK || error == EINTR ||
- error == ERESTART);
- if (error)
- goto out;
- /* short return guarantees unhappiness */
- if (auio.uio_resid > 0) {
- SMBERROR("packet is shorter than expected\n");
- error = EPIPE;
- goto out;
- }
- /* append received chunk to previous chunk(s) */
- if (m == NULL) {
- m = tm;
- } else {
- /*
- * Just glue the new chain on the end.
- * Consumer will pullup as required.
- */
- for (im = m; im->m_next != NULL; im = im->m_next)
- ;
- im->m_next = tm;
- }
- }
- /* got a session/message packet? */
- if (nbp->nbp_state == NBST_SESSION &&
- rpcode == NB_SSN_MESSAGE)
- break;
- /* drop packet and try for another */
- NBDEBUG("non-session packet %x\n", rpcode);
- if (m) {
- m_freem(m);
- m = NULL;
- }
- }
- out:
- if (error) {
- if (m)
- m_freem(m);
- return error;
- }
- if (mpp)
- *mpp = m;
- else
- m_freem(m);
- *lenp = len;
- *rpcodep = rpcode;
- return 0;
- }
- /*
- * SMB transport interface
- */
- static int
- smb_nbst_create(struct smb_vc *vcp, struct thread *td)
- {
- struct nbpcb *nbp;
- nbp = malloc(sizeof *nbp, M_NBDATA, M_WAITOK);
- bzero(nbp, sizeof *nbp);
- nbp->nbp_timo.tv_sec = 15; /* 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 thread *td)
- {
- struct nbpcb *nbp = vcp->vc_tdata;
- if (nbp == NULL)
- return ENOTCONN;
- smb_nbst_disconnect(vcp, td);
- 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 thread *td)
- {
- 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;
- snb = (struct sockaddr_nb*)sodupsockaddr(sap, M_WAITOK);
- if (snb == NULL) {
- 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 thread *td)
- {
- struct nbpcb *nbp = vcp->vc_tdata;
- struct sockaddr_in sin;
- struct sockaddr_nb *snb;
- struct timespec ts1, ts2;
- 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*)sodupsockaddr(sap, M_WAITOK);
- if (snb == NULL)
- return ENOMEM;
- nbp->nbp_paddr = snb;
- sin = snb->snb_addrin;
- getnanotime(&ts1);
- error = nb_connect_in(nbp, &sin, td);
- if (error)
- return error;
- getnanotime(&ts2);
- timespecsub(&ts2, &ts1, &ts2);
- if (ts2.tv_sec == 0) {
- ts2.tv_sec = 1;
- ts2.tv_nsec = 0;
- }
- timespecadd(&ts2, &ts2, &nbp->nbp_timo);
- timespecadd(&nbp->nbp_timo, &ts2, &nbp->nbp_timo);
- timespecadd(&nbp->nbp_timo, &ts2, &nbp->nbp_timo); /* * 4 */
- error = nbssn_rq_request(nbp, td);
- if (error)
- smb_nbst_disconnect(vcp, td);
- return error;
- }
- static int
- smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td)
- {
- 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 thread *td)
- {
- struct nbpcb *nbp = vcp->vc_tdata;
- int error;
- if (nbp->nbp_state != NBST_SESSION) {
- error = ENOTCONN;
- goto abort;
- }
- M_PREPEND(m0, 4, M_WAITOK);
- nb_sethdr(m0, NB_SSN_MESSAGE, m_fixhdr(m0) - 4);
- error = nb_sosend(nbp->nbp_tso, m0, 0, td);
- return error;
- abort:
- if (m0)
- m_freem(m0);
- return error;
- }
- static int
- smb_nbst_recv(struct smb_vc *vcp, struct mbuf **mpp, struct thread *td)
- {
- 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, td);
- nbp->nbp_flags &= ~NBF_RECVLOCK;
- return error;
- }
- static void
- smb_nbst_timo(struct smb_vc *vcp)
- {
- 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_getparam(struct smb_vc *vcp, int param, void *data)
- {
- struct nbpcb *nbp = vcp->vc_tdata;
- switch (param) {
- case SMBTP_SNDSZ:
- *(int*)data = nbp->nbp_sndbuf;
- break;
- case SMBTP_RCVSZ:
- *(int*)data = nbp->nbp_rcvbuf;
- break;
- case SMBTP_TIMEOUT:
- *(struct timespec*)data = nbp->nbp_timo;
- 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
- };
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