/*- * 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #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 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); if (ts2.tv_sec == 0) { ts2.tv_sec = 1; ts2.tv_nsec = 0; } nbp->nbp_timo = ts2; timespecadd(&nbp->nbp_timo, &ts2); timespecadd(&nbp->nbp_timo, &ts2); timespecadd(&nbp->nbp_timo, &ts2); /* * 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 };