/* * 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 1.3.2.1 2001/05/22 08:32:34 bp Exp $ * $DragonFly: src/sys/netproto/smb/smb_trantcp.c,v 1.14 2006/05/06 02:43:13 dillon Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "netbios.h" #include "smb.h" #include "smb_conn.h" #include "smb_tran.h" #include "smb_trantcp.h" #include "smb_subr.h" #define M_NBDATA M_PCB static int smb_tcpsndbuf = 10 * 1024; static int smb_tcprcvbuf = 10 * 1024; 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,p) \ so_pru_sosend(so, NULL, NULL, m, NULL, 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; 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); } static __inline int nb_poll(struct nbpcb *nbp, int events, struct thread *td) { return so_pru_sopoll(nbp->nbp_tso, events, NULL); } static int nbssn_rselect(struct nbpcb *nbp, struct timeval *tv, int events, struct thread *td) { struct proc *p = td->td_proc; struct timeval atv, rtv, ttv; int timo, error; if (tv) { atv = *tv; if (itimerfix(&atv)) { error = EINVAL; goto done; } getmicrouptime(&rtv); timevaladd(&atv, &rtv); } timo = 0; KKASSERT(p); retry: p->p_flag |= P_SELECT; error = nb_poll(nbp, events, td); if (error) { error = 0; goto done; } if (tv) { getmicrouptime(&rtv); if (timevalcmp(&rtv, &atv, >=)) goto done; ttv = atv; timevalsub(&ttv, &rtv); timo = tvtohz_high(&ttv); } crit_enter(); if ((p->p_flag & P_SELECT) == 0) { crit_exit(); goto retry; } p->p_flag &= ~P_SELECT; error = tsleep((caddr_t)&selwait, 0, "nbsel", timo); crit_exit(); done: p->p_flag &= ~P_SELECT; if (error == ERESTART) return 0; return error; } static int nb_intr(struct nbpcb *nbp, struct thread *td) { return 0; } static void nb_upcall(struct socket *so, void *arg, int waitflag) { struct nbpcb *nbp = 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 thread *td) { struct socket *so; int error; error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP, td); 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 = (5 * hz); so->so_snd.sb_timeo = (5 * hz); error = soreserve(so, nbp->nbp_sndbuf, nbp->nbp_rcvbuf, &td->td_proc->p_rlimit[RLIMIT_SBSIZE]); 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; error = soconnect(so, (struct sockaddr*)to, td); /* * If signals are allowed nbssn_recv() can wind up in a hard loop * on EWOULDBLOCK. */ so->so_rcv.sb_flags |= SB_NOINTR; so->so_snd.sb_flags |= SB_NOINTR; if (error) goto bad; crit_enter(); while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { tsleep(&so->so_timeo, 0, "nbcon", 2 * hz); if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 && (error = nb_intr(nbp, td)) != 0) { so->so_state &= ~SS_ISCONNECTING; crit_exit(); goto bad; } } if (so->so_error) { error = so->so_error; so->so_error = 0; crit_exit(); goto bad; } crit_exit(); 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 mb, *mbp = &mb; struct mdchain md, *mdp = &md; 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_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); if (error) return error; TIMESPEC_TO_TIMEVAL(&tv, &nbp->nbp_timo); error = nbssn_rselect(nbp, &tv, POLLIN, td); 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, td); 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, 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); 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; error = so_pru_soreceive(so, NULL, &auio, NULL, NULL, &flags); 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; 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_DONTWAIT, td); 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; if (rpcode == NB_SSN_KEEPALIVE) continue; bzero(&auio, sizeof(auio)); auio.uio_resid = len; auio.uio_td = td; do { rcvflg = MSG_WAITALL; error = so_pru_soreceive(so, NULL, &auio, &m, NULL, &rcvflg); } 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; } /* * SMB transport interface */ static int smb_nbst_create(struct smb_vc *vcp, struct thread *td) { struct nbpcb *nbp; MALLOC(nbp, struct nbpcb *, 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*)dup_sockaddr(sap); 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*)dup_sockaddr(sap); 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 == 0) ts2.tv_sec = 1; 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, MB_TRYWAIT); if (m0 == NULL) return ENOBUFS; 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 };