/* $NetBSD: smb_trantcp.c,v 1.15 2003/06/29 22:32:11 fvdl Exp $ */ /* * 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. * 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. * * FreeBSD: src/sys/netsmb/smb_trantcp.c,v 1.17 2003/02/19 05:47:38 imp Exp */ #include __KERNEL_RCSID(0, "$NetBSD: smb_trantcp.c,v 1.15 2003/06/29 22:32:11 fvdl Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define M_NBDATA M_PCB static int nb_tcpsndbuf = NB_SNDQ; static int nb_tcprcvbuf = NB_RCVQ; static const struct timeval nb_timo = { 15, 0 }; /* XXX sysctl? */ #ifndef __NetBSD__ SYSCTL_DECL(_net_smb); SYSCTL_INT(_net_smb, OID_AUTO, tcpsndbuf, CTLFLAG_RW, &nb_tcpsndbuf, 0, ""); SYSCTL_INT(_net_smb, OID_AUTO, tcprcvbuf, CTLFLAG_RW, &nb_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 #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) { #ifdef __NetBSD__ return sosetopt(so, level, name, NULL); /* XXX */ #else 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); #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 /* XXX this is exactly equal to soo_poll() */ struct socket *so = nbp->nbp_tso; int revents = 0; int s = splsoftnet(); if (events & (POLLIN | POLLRDNORM)) if (soreadable(so)) revents |= events & (POLLIN | POLLRDNORM); if (events & (POLLOUT | POLLWRNORM)) if (sowritable(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, const struct timeval *tv, int events, struct proc *p) { struct timeval atv; extern int nselcoll; int ncoll; int timo, error; int s; struct lwp *l = curlwp; if (tv) { atv = *tv; if (itimerfix(&atv)) return (EINVAL); s = splclock(); timeradd(&atv, &time, &atv); splx(s); timo = hzto(&atv); if (timo <= 0) return (EWOULDBLOCK); } else timo = 0; retry: ncoll = nselcoll; l->l_flag |= L_SELECT; error = nb_poll(nbp, events, p); if (error) { error = 0; goto done; } if (tv) { /* * We have to recalculate the timeout on every retry. */ timo = hzto(&atv); if (timo <= 0) { error = EWOULDBLOCK; goto done; } } s = splsched(); if ((l->l_flag & L_SELECT) == 0 || nselcoll != ncoll) { splx(s); goto retry; } l->l_flag &= ~L_SELECT; error = tsleep((caddr_t)&selwait, PSOCK, "smbsel", timo); splx(s); if (error == 0) goto retry; done: l->l_flag &= ~L_SELECT; /* select is not restarted after signals... */ if (error == ERESTART) error = 0; return (error); } static int nb_intr(struct nbpcb *nbp, struct proc *p) { return 0; } static void nb_upcall(struct socket *so, caddr_t arg, int waitflag) { struct nbpcb *nbp = (void *)arg; if (arg == NULL || nbp->nbp_selectid == NULL) return; wakeup(nbp->nbp_selectid); } 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 proc *p) { struct socket *so; int error, s; #ifdef __NetBSD__ struct mbuf *m; #endif error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP); if (error) return error; nbp->nbp_tso = so; so->so_upcallarg = (caddr_t)nbp; so->so_upcall = nb_upcall; so->so_rcv.sb_flags |= SB_UPCALL; so->so_rcv.sb_timeo = NB_SNDTIMEO; so->so_snd.sb_timeo = NB_RCVTIMEO; error = soreserve(so, nb_tcpsndbuf, nb_tcprcvbuf); 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 m = m_get(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, "smbcon", 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 mbchain mb, *mbp = &mb; struct mdchain md, *mdp = &md; struct mbuf *m0; struct sockaddr_in sin; u_short port; u_int8_t rpcode; int error, rplen; error = mb_init(mbp); if (error) return error; mb_put_uint32le(mbp, 0); (void) nb_put_name(mbp, nbp->nbp_paddr); (void) 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; } mb_detach(mbp); mb_done(mbp); if (error) return error; error = nbssn_rselect(nbp, &nb_timo, 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) 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, 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); if (m0) md_done(mdp); 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, *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. */ error = nbssn_recvhdr(nbp, &len, &rpcode, MSG_DONTWAIT, 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; /* 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_procp = p; resid -= auio.uio_resid; /* * Spin until we have collected everything in * this chunk. */ do { rcvflg = MSG_WAITALL; #ifdef __NetBSD__ error = (*so->so_receive)(so, (struct mbuf **)0, &auio, &tm, (struct mbuf **)NULL, &rcvflg); #else error = so->so_proto->pr_usrreqs->pru_soreceive (so, (struct sockaddr **)NULL, &auio, &tm, (struct mbuf **)NULL, &rcvflg); #endif } 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 proc *p) { struct nbpcb *nbp; MALLOC(nbp, struct nbpcb *, sizeof *nbp, M_NBDATA, M_WAITOK); memset(nbp, 0, sizeof *nbp); nbp->nbp_state = NBST_CLOSED; nbp->nbp_vc = vcp; 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; snb = (struct sockaddr_nb*)dup_sockaddr(sap, 1); 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 proc *p) { 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, p); if (error) return error; 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) { /* Nothing */ } 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) { switch (param) { case SMBTP_SNDSZ: *(int*)data = nb_tcpsndbuf; break; case SMBTP_RCVSZ: *(int*)data = nb_tcprcvbuf; break; case SMBTP_TIMEOUT: *(struct timeval*)data = nb_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 };