486 lines
12 KiB
C
486 lines
12 KiB
C
/*-
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* Copyright (c) 2005-2006 Robert N. M. Watson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Copyright (c) 1996 Charles D. Cranor and Washington University.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles D. Cranor and
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* Washington University.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $NetBSD: natm.c,v 1.5 1996/11/09 03:26:26 chuck Exp $
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*/
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/*
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* natm.c: Native mode ATM access (both aal0 and aal5).
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/signalvar.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sockio.h>
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#include <sys/sx.h>
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#include <sys/systm.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/if_atm.h>
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#include <net/netisr.h>
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#include <netinet/in.h>
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#include <netnatm/natm.h>
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static const u_long natm5_sendspace = 16*1024;
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static const u_long natm5_recvspace = 16*1024;
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static const u_long natm0_sendspace = 16*1024;
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static const u_long natm0_recvspace = 16*1024;
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/*
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* netnatm global subsystem lock, protects all global data structures in
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* netnatm.
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*/
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struct mtx natm_mtx;
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/*
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* User socket requests.
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*/
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static int natm_usr_attach(struct socket *, int, d_thread_t *);
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static void natm_usr_detach(struct socket *);
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static int natm_usr_connect(struct socket *, struct sockaddr *,
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d_thread_t *);
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static int natm_usr_disconnect(struct socket *);
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static int natm_usr_shutdown(struct socket *);
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static int natm_usr_send(struct socket *, int, struct mbuf *,
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struct sockaddr *, struct mbuf *, d_thread_t *);
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static int natm_usr_peeraddr(struct socket *, struct sockaddr **);
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static int natm_usr_control(struct socket *, u_long, caddr_t,
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struct ifnet *, d_thread_t *);
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static void natm_usr_abort(struct socket *);
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static int natm_usr_bind(struct socket *, struct sockaddr *,
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d_thread_t *);
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static int natm_usr_sockaddr(struct socket *, struct sockaddr **);
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static int
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natm_usr_attach(struct socket *so, int proto, d_thread_t *p)
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{
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struct natmpcb *npcb;
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int error = 0;
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npcb = (struct natmpcb *)so->so_pcb;
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KASSERT(npcb == NULL, ("natm_usr_attach: so_pcb != NULL"));
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if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
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if (proto == PROTO_NATMAAL5)
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error = soreserve(so, natm5_sendspace,
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natm5_recvspace);
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else
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error = soreserve(so, natm0_sendspace,
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natm0_recvspace);
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if (error)
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return (error);
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}
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so->so_pcb = npcb = npcb_alloc(M_WAITOK);
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npcb->npcb_socket = so;
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return (error);
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}
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static void
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natm_usr_detach(struct socket *so)
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{
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struct natmpcb *npcb;
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npcb = (struct natmpcb *)so->so_pcb;
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KASSERT(npcb != NULL, ("natm_usr_detach: npcb == NULL"));
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NATM_LOCK();
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npcb_free(npcb, NPCB_DESTROY); /* drain */
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so->so_pcb = NULL;
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NATM_UNLOCK();
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}
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static int
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natm_usr_connect(struct socket *so, struct sockaddr *nam, d_thread_t *p)
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{
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struct natmpcb *npcb;
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struct sockaddr_natm *snatm;
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struct atmio_openvcc op;
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struct ifnet *ifp;
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int error = 0;
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int proto = so->so_proto->pr_protocol;
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npcb = (struct natmpcb *)so->so_pcb;
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KASSERT(npcb != NULL, ("natm_usr_connect: npcb == NULL"));
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/*
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* Validate nam and npcb.
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*/
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NATM_LOCK();
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snatm = (struct sockaddr_natm *)nam;
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if (snatm->snatm_len != sizeof(*snatm) ||
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(npcb->npcb_flags & NPCB_FREE) == 0) {
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NATM_UNLOCK();
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return (EINVAL);
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}
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if (snatm->snatm_family != AF_NATM) {
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NATM_UNLOCK();
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return (EAFNOSUPPORT);
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}
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snatm->snatm_if[IFNAMSIZ - 1] = '\0'; /* XXX ensure null termination
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since ifunit() uses strcmp */
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/*
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* Convert interface string to ifp, validate.
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*/
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ifp = ifunit(snatm->snatm_if);
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if (ifp == NULL || (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
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NATM_UNLOCK();
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return (ENXIO);
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}
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if (ifp->if_output != atm_output) {
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NATM_UNLOCK();
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return (EAFNOSUPPORT);
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}
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/*
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* Register us with the NATM PCB layer.
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*/
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if (npcb_add(npcb, ifp, snatm->snatm_vci, snatm->snatm_vpi) != npcb) {
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NATM_UNLOCK();
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return (EADDRINUSE);
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}
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/*
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* Open the channel.
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*
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* XXXRW: Eventually desirable to hold mutex over ioctl?
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*/
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bzero(&op, sizeof(op));
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op.rxhand = npcb;
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op.param.flags = ATMIO_FLAG_PVC;
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op.param.vpi = npcb->npcb_vpi;
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op.param.vci = npcb->npcb_vci;
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op.param.rmtu = op.param.tmtu = ifp->if_mtu;
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op.param.aal = (proto == PROTO_NATMAAL5) ? ATMIO_AAL_5 : ATMIO_AAL_0;
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op.param.traffic = ATMIO_TRAFFIC_UBR;
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NATM_UNLOCK();
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IFF_LOCKGIANT(ifp);
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if (ifp->if_ioctl == NULL ||
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ifp->if_ioctl(ifp, SIOCATMOPENVCC, (caddr_t)&op) != 0) {
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IFF_UNLOCKGIANT(ifp);
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return (EIO);
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}
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IFF_UNLOCKGIANT(ifp);
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soisconnected(so);
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return (error);
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}
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static int
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natm_usr_disconnect(struct socket *so)
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{
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struct natmpcb *npcb;
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struct atmio_closevcc cl;
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struct ifnet *ifp;
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int error = 0;
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npcb = (struct natmpcb *)so->so_pcb;
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KASSERT(npcb != NULL, ("natm_usr_disconnect: npcb == NULL"));
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NATM_LOCK();
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if ((npcb->npcb_flags & NPCB_CONNECTED) == 0) {
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NATM_UNLOCK();
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printf("natm: disconnected check\n");
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return (EIO);
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}
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ifp = npcb->npcb_ifp;
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/*
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* Disable rx.
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*
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* XXXRW: Eventually desirable to hold mutex over ioctl?
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*/
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cl.vpi = npcb->npcb_vpi;
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cl.vci = npcb->npcb_vci;
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NATM_UNLOCK();
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if (ifp->if_ioctl != NULL) {
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IFF_LOCKGIANT(ifp);
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ifp->if_ioctl(ifp, SIOCATMCLOSEVCC, (caddr_t)&cl);
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IFF_UNLOCKGIANT(ifp);
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}
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soisdisconnected(so);
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return (error);
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}
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static int
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natm_usr_shutdown(struct socket *so)
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{
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socantsendmore(so);
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return (0);
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}
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static int
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natm_usr_send(struct socket *so, int flags, struct mbuf *m,
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struct sockaddr *nam, struct mbuf *control, d_thread_t *p)
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{
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struct natmpcb *npcb;
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struct atm_pseudohdr *aph;
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int error = 0;
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int proto = so->so_proto->pr_protocol;
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npcb = (struct natmpcb *)so->so_pcb;
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KASSERT(npcb != NULL, ("natm_usr_send: npcb == NULL"));
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NATM_LOCK();
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if (control && control->m_len) {
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NATM_UNLOCK();
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m_freem(control);
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m_freem(m);
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return (EINVAL);
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}
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/*
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* Send the data. We must put an atm_pseudohdr on first.
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*/
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M_PREPEND(m, sizeof(*aph), M_DONTWAIT);
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if (m == NULL) {
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NATM_UNLOCK();
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m_freem(control);
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return (ENOBUFS);
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}
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aph = mtod(m, struct atm_pseudohdr *);
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ATM_PH_VPI(aph) = npcb->npcb_vpi;
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ATM_PH_SETVCI(aph, npcb->npcb_vci);
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ATM_PH_FLAGS(aph) = (proto == PROTO_NATMAAL5) ? ATM_PH_AAL5 : 0;
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error = atm_output(npcb->npcb_ifp, m, NULL, NULL);
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NATM_UNLOCK();
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return (error);
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}
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static int
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natm_usr_peeraddr(struct socket *so, struct sockaddr **nam)
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{
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struct natmpcb *npcb;
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struct sockaddr_natm *snatm, ssnatm;
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npcb = (struct natmpcb *)so->so_pcb;
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KASSERT(npcb != NULL, ("natm_usr_peeraddr: npcb == NULL"));
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NATM_LOCK();
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snatm = &ssnatm;
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bzero(snatm, sizeof(*snatm));
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snatm->snatm_len = sizeof(*snatm);
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snatm->snatm_family = AF_NATM;
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strlcpy(snatm->snatm_if, npcb->npcb_ifp->if_xname,
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sizeof(snatm->snatm_if));
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snatm->snatm_vci = npcb->npcb_vci;
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snatm->snatm_vpi = npcb->npcb_vpi;
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NATM_UNLOCK();
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*nam = sodupsockaddr((struct sockaddr *)snatm, M_WAITOK);
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return (0);
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}
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static int
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natm_usr_control(struct socket *so, u_long cmd, caddr_t arg,
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struct ifnet *ifp, d_thread_t *p)
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{
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struct natmpcb *npcb;
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int error;
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npcb = (struct natmpcb *)so->so_pcb;
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KASSERT(npcb != NULL, ("natm_usr_control: npcb == NULL"));
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if (ifp == NULL || ifp->if_ioctl == NULL)
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return (EOPNOTSUPP);
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IFF_LOCKGIANT(ifp);
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error = ((*ifp->if_ioctl)(ifp, cmd, arg));
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IFF_UNLOCKGIANT(ifp);
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return (error);
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}
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static void
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natm_usr_abort(struct socket *so)
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{
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}
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static void
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natm_usr_close(struct socket *so)
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{
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}
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static int
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natm_usr_bind(struct socket *so, struct sockaddr *nam, d_thread_t *p)
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{
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return (EOPNOTSUPP);
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}
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static int
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natm_usr_sockaddr(struct socket *so, struct sockaddr **nam)
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{
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return (EOPNOTSUPP);
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}
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/* xxx - should be const */
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struct pr_usrreqs natm_usrreqs = {
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.pru_abort = natm_usr_abort,
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.pru_attach = natm_usr_attach,
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.pru_bind = natm_usr_bind,
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.pru_connect = natm_usr_connect,
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.pru_control = natm_usr_control,
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.pru_detach = natm_usr_detach,
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.pru_disconnect = natm_usr_disconnect,
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.pru_peeraddr = natm_usr_peeraddr,
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.pru_send = natm_usr_send,
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.pru_shutdown = natm_usr_shutdown,
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.pru_sockaddr = natm_usr_sockaddr,
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.pru_close = natm_usr_close,
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};
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/*
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* natmintr: interrupt
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*
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* Note: we expect a socket pointer in rcvif rather than an interface
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* pointer. We can get the interface pointer from the so's PCB if we really
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* need it.
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*/
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void
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natmintr(struct mbuf *m)
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{
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struct socket *so;
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struct natmpcb *npcb;
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#ifdef DIAGNOSTIC
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M_ASSERTPKTHDR(m);
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#endif
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NATM_LOCK();
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npcb = (struct natmpcb *)m->m_pkthdr.rcvif; /* XXX: overloaded */
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so = npcb->npcb_socket;
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npcb->npcb_inq--;
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if (npcb->npcb_flags & NPCB_DRAIN) {
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if (npcb->npcb_inq == 0)
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free(npcb, M_PCB); /* done! */
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NATM_UNLOCK();
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m_freem(m);
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return;
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}
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if (npcb->npcb_flags & NPCB_FREE) {
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NATM_UNLOCK();
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m_freem(m); /* drop */
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return;
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}
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#ifdef NEED_TO_RESTORE_IFP
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m->m_pkthdr.rcvif = npcb->npcb_ifp;
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#else
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#ifdef DIAGNOSTIC
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m->m_pkthdr.rcvif = NULL; /* null it out to be safe */
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#endif
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#endif
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if (sbspace(&so->so_rcv) > m->m_pkthdr.len) {
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#ifdef NATM_STAT
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natm_sookcnt++;
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natm_sookbytes += m->m_pkthdr.len;
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#endif
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sbappendrecord(&so->so_rcv, m);
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sorwakeup(so);
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NATM_UNLOCK();
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} else {
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#ifdef NATM_STAT
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natm_sodropcnt++;
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natm_sodropbytes += m->m_pkthdr.len;
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#endif
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NATM_UNLOCK();
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m_freem(m);
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}
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}
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/*
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* natm0_sysctl: not used, but here in case we want to add something
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* later...
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*/
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int
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natm0_sysctl(SYSCTL_HANDLER_ARGS)
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{
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/* All sysctl names at this level are terminal. */
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return (ENOENT);
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}
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/*
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* natm5_sysctl: not used, but here in case we want to add something
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* later...
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*/
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int
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natm5_sysctl(SYSCTL_HANDLER_ARGS)
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{
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/* All sysctl names at this level are terminal. */
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return (ENOENT);
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}
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