1995-02-26 12:18:08 +00:00
|
|
|
/* $NetBSD: if_tun.c,v 1.14 1994/06/29 06:36:25 cgd Exp $ */
|
|
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|
|
1995-01-31 06:15:49 +00:00
|
|
|
/*
|
|
|
|
* Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk>
|
|
|
|
* Nottingham University 1987.
|
|
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|
*
|
|
|
|
* This source may be freely distributed, however I would be interested
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|
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|
* in any changes that are made.
|
|
|
|
*
|
|
|
|
* This driver takes packets off the IP i/f and hands them up to a
|
1998-04-17 22:37:19 +00:00
|
|
|
* user process to have its wicked way with. This driver has it's
|
1995-01-31 06:15:49 +00:00
|
|
|
* roots in a similar driver written by Phil Cockcroft (formerly) at
|
1997-09-14 03:09:01 +00:00
|
|
|
* UCL. This driver is based much more on read/write/poll mode of
|
1995-01-31 06:15:49 +00:00
|
|
|
* operation though.
|
1999-09-25 12:06:01 +00:00
|
|
|
*
|
|
|
|
* $FreeBSD$
|
1995-01-31 06:15:49 +00:00
|
|
|
*/
|
|
|
|
|
1998-01-08 23:42:31 +00:00
|
|
|
#include "opt_inet.h"
|
|
|
|
|
1995-02-26 12:18:08 +00:00
|
|
|
#include <sys/param.h>
|
|
|
|
#include <sys/proc.h>
|
|
|
|
#include <sys/systm.h>
|
|
|
|
#include <sys/mbuf.h>
|
|
|
|
#include <sys/socket.h>
|
1997-03-24 12:12:36 +00:00
|
|
|
#include <sys/filio.h>
|
|
|
|
#include <sys/sockio.h>
|
|
|
|
#include <sys/ttycom.h>
|
1997-09-14 03:09:01 +00:00
|
|
|
#include <sys/poll.h>
|
1995-03-16 18:17:34 +00:00
|
|
|
#include <sys/signalvar.h>
|
Installed the second patch attached to kern/7899 with some changes suggested
by bde, a few other tweaks to get the patch to apply cleanly again and
some improvements to the comments.
This change closes some fairly minor security holes associated with
F_SETOWN, fixes a few bugs, and removes some limitations that F_SETOWN
had on tty devices. For more details, see the description on the PR.
Because this patch increases the size of the proc and pgrp structures,
it is necessary to re-install the includes and recompile libkvm,
the vinum lkm, fstat, gcore, gdb, ipfilter, ps, top, and w.
PR: kern/7899
Reviewed by: bde, elvind
1998-11-11 10:04:13 +00:00
|
|
|
#include <sys/filedesc.h>
|
1995-02-26 12:18:08 +00:00
|
|
|
#include <sys/kernel.h>
|
1995-12-09 20:47:15 +00:00
|
|
|
#include <sys/sysctl.h>
|
1995-04-10 20:35:45 +00:00
|
|
|
#include <sys/conf.h>
|
1997-11-18 16:36:15 +00:00
|
|
|
#include <sys/uio.h>
|
|
|
|
#include <sys/vnode.h>
|
1999-08-15 09:54:57 +00:00
|
|
|
#include <sys/malloc.h>
|
1995-01-31 06:15:49 +00:00
|
|
|
|
|
|
|
#include <net/if.h>
|
|
|
|
#include <net/netisr.h>
|
|
|
|
#include <net/route.h>
|
|
|
|
|
|
|
|
#ifdef INET
|
|
|
|
#include <netinet/in.h>
|
|
|
|
#include <netinet/in_var.h>
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef NS
|
|
|
|
#include <netns/ns.h>
|
|
|
|
#include <netns/ns_if.h>
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#include <net/bpf.h>
|
|
|
|
|
1998-01-11 17:52:29 +00:00
|
|
|
#include <net/if_tunvar.h>
|
1995-01-31 06:15:49 +00:00
|
|
|
#include <net/if_tun.h>
|
|
|
|
|
1999-08-15 09:54:57 +00:00
|
|
|
static MALLOC_DEFINE(M_TUN, "tun", "Tunnel Interface");
|
|
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|
|
1995-09-09 18:10:37 +00:00
|
|
|
static void tunattach __P((void *));
|
1995-08-30 00:33:22 +00:00
|
|
|
PSEUDO_SET(tunattach, if_tun);
|
1995-11-29 10:49:16 +00:00
|
|
|
|
1999-08-15 09:54:57 +00:00
|
|
|
static void tuncreate __P((dev_t dev));
|
|
|
|
|
1995-01-31 06:15:49 +00:00
|
|
|
#define TUNDEBUG if (tundebug) printf
|
1995-12-09 20:47:15 +00:00
|
|
|
static int tundebug = 0;
|
1996-02-09 09:23:56 +00:00
|
|
|
SYSCTL_INT(_debug, OID_AUTO, if_tun_debug, CTLFLAG_RW, &tundebug, 0, "");
|
1995-01-31 06:15:49 +00:00
|
|
|
|
1995-12-09 20:47:15 +00:00
|
|
|
static int tunoutput __P((struct ifnet *, struct mbuf *, struct sockaddr *,
|
1995-02-26 12:18:08 +00:00
|
|
|
struct rtentry *rt));
|
1998-06-07 17:13:14 +00:00
|
|
|
static int tunifioctl __P((struct ifnet *, u_long, caddr_t));
|
1999-08-15 09:54:57 +00:00
|
|
|
static int tuninit __P((struct ifnet *));
|
1995-01-31 06:15:49 +00:00
|
|
|
|
1995-12-08 11:19:42 +00:00
|
|
|
static d_open_t tunopen;
|
|
|
|
static d_close_t tunclose;
|
|
|
|
static d_read_t tunread;
|
|
|
|
static d_write_t tunwrite;
|
|
|
|
static d_ioctl_t tunioctl;
|
1997-09-14 03:09:01 +00:00
|
|
|
static d_poll_t tunpoll;
|
1995-12-08 11:19:42 +00:00
|
|
|
|
|
|
|
#define CDEV_MAJOR 52
|
|
|
|
static struct cdevsw tun_cdevsw = {
|
1999-05-30 16:53:49 +00:00
|
|
|
/* open */ tunopen,
|
|
|
|
/* close */ tunclose,
|
|
|
|
/* read */ tunread,
|
|
|
|
/* write */ tunwrite,
|
|
|
|
/* ioctl */ tunioctl,
|
|
|
|
/* poll */ tunpoll,
|
|
|
|
/* mmap */ nommap,
|
|
|
|
/* strategy */ nostrategy,
|
|
|
|
/* name */ "tun",
|
|
|
|
/* maj */ CDEV_MAJOR,
|
|
|
|
/* dump */ nodump,
|
|
|
|
/* psize */ nopsize,
|
|
|
|
/* flags */ 0,
|
|
|
|
/* bmaj */ -1
|
1995-11-06 00:36:19 +00:00
|
|
|
};
|
1995-04-10 20:35:45 +00:00
|
|
|
|
1995-08-30 00:33:22 +00:00
|
|
|
static void
|
1995-11-06 00:36:19 +00:00
|
|
|
tunattach(dummy)
|
|
|
|
void *dummy;
|
1995-01-31 06:15:49 +00:00
|
|
|
{
|
|
|
|
|
1999-05-31 11:29:30 +00:00
|
|
|
cdevsw_add(&tun_cdevsw);
|
1999-08-15 09:54:57 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
tuncreate(dev)
|
|
|
|
dev_t dev;
|
|
|
|
{
|
|
|
|
struct tun_softc *sc;
|
|
|
|
struct ifnet *ifp;
|
|
|
|
|
|
|
|
dev = make_dev(&tun_cdevsw, minor(dev),
|
|
|
|
UID_UUCP, GID_DIALER, 0600, "tun%d", lminor(dev));
|
|
|
|
|
|
|
|
MALLOC(sc, struct tun_softc *, sizeof(*sc), M_TUN, M_WAITOK);
|
|
|
|
bzero(sc, sizeof *sc);
|
|
|
|
sc->tun_flags = TUN_INITED;
|
|
|
|
|
|
|
|
ifp = &sc->tun_if;
|
|
|
|
ifp->if_unit = lminor(dev);
|
|
|
|
ifp->if_name = "tun";
|
|
|
|
ifp->if_mtu = TUNMTU;
|
|
|
|
ifp->if_ioctl = tunifioctl;
|
|
|
|
ifp->if_output = tunoutput;
|
|
|
|
ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
|
|
|
|
ifp->if_snd.ifq_maxlen = ifqmaxlen;
|
|
|
|
ifp->if_softc = sc;
|
|
|
|
if_attach(ifp);
|
|
|
|
bpfattach(ifp, DLT_NULL, sizeof(u_int));
|
|
|
|
dev->si_drv1 = sc;
|
1995-01-31 06:15:49 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* tunnel open - must be superuser & the device must be
|
|
|
|
* configured in
|
|
|
|
*/
|
1995-12-08 11:19:42 +00:00
|
|
|
static int
|
1995-01-31 06:15:49 +00:00
|
|
|
tunopen(dev, flag, mode, p)
|
|
|
|
dev_t dev;
|
|
|
|
int flag, mode;
|
|
|
|
struct proc *p;
|
|
|
|
{
|
|
|
|
struct ifnet *ifp;
|
|
|
|
struct tun_softc *tp;
|
1999-08-15 09:54:57 +00:00
|
|
|
register int error;
|
1995-01-31 06:15:49 +00:00
|
|
|
|
1999-04-27 11:18:52 +00:00
|
|
|
error = suser(p);
|
1995-12-09 20:47:15 +00:00
|
|
|
if (error)
|
1995-01-31 06:15:49 +00:00
|
|
|
return (error);
|
|
|
|
|
1999-08-15 09:54:57 +00:00
|
|
|
tp = dev->si_drv1;
|
|
|
|
if (!tp) {
|
|
|
|
tuncreate(dev);
|
|
|
|
tp = dev->si_drv1;
|
|
|
|
}
|
1995-01-31 06:15:49 +00:00
|
|
|
if (tp->tun_flags & TUN_OPEN)
|
1996-05-26 22:05:36 +00:00
|
|
|
return EBUSY;
|
1999-06-19 18:42:31 +00:00
|
|
|
tp->tun_pid = p->p_pid;
|
1995-01-31 06:15:49 +00:00
|
|
|
ifp = &tp->tun_if;
|
|
|
|
tp->tun_flags |= TUN_OPEN;
|
|
|
|
TUNDEBUG("%s%d: open\n", ifp->if_name, ifp->if_unit);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* tunclose - close the device - mark i/f down & delete
|
|
|
|
* routing info
|
|
|
|
*/
|
1995-12-08 11:19:42 +00:00
|
|
|
static int
|
1997-11-18 16:36:15 +00:00
|
|
|
tunclose(dev, foo, bar, p)
|
|
|
|
dev_t dev;
|
|
|
|
int foo;
|
|
|
|
int bar;
|
|
|
|
struct proc *p;
|
1995-01-31 06:15:49 +00:00
|
|
|
{
|
1999-08-15 09:54:57 +00:00
|
|
|
register int s;
|
|
|
|
struct tun_softc *tp;
|
|
|
|
struct ifnet *ifp;
|
1995-01-31 06:15:49 +00:00
|
|
|
struct mbuf *m;
|
|
|
|
|
1999-08-15 09:54:57 +00:00
|
|
|
tp = dev->si_drv1;
|
|
|
|
ifp = &tp->tun_if;
|
|
|
|
|
1995-01-31 06:15:49 +00:00
|
|
|
tp->tun_flags &= ~TUN_OPEN;
|
1999-06-19 18:42:31 +00:00
|
|
|
tp->tun_pid = 0;
|
1995-01-31 06:15:49 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* junk all pending output
|
|
|
|
*/
|
|
|
|
do {
|
|
|
|
s = splimp();
|
|
|
|
IF_DEQUEUE(&ifp->if_snd, m);
|
|
|
|
splx(s);
|
|
|
|
if (m)
|
|
|
|
m_freem(m);
|
|
|
|
} while (m);
|
|
|
|
|
|
|
|
if (ifp->if_flags & IFF_UP) {
|
|
|
|
s = splimp();
|
|
|
|
if_down(ifp);
|
|
|
|
splx(s);
|
|
|
|
}
|
1999-05-27 13:18:28 +00:00
|
|
|
|
|
|
|
if (ifp->if_flags & IFF_RUNNING) {
|
|
|
|
register struct ifaddr *ifa;
|
|
|
|
|
|
|
|
s = splimp();
|
|
|
|
/* find internet addresses and delete routes */
|
|
|
|
for (ifa = ifp->if_addrhead.tqh_first; ifa;
|
|
|
|
ifa = ifa->ifa_link.tqe_next)
|
|
|
|
if (ifa->ifa_addr->sa_family == AF_INET)
|
|
|
|
rtinit(ifa, (int)RTM_DELETE,
|
|
|
|
tp->tun_flags & TUN_DSTADDR ? RTF_HOST : 0);
|
|
|
|
ifp->if_flags &= ~IFF_RUNNING;
|
|
|
|
splx(s);
|
|
|
|
}
|
|
|
|
|
Installed the second patch attached to kern/7899 with some changes suggested
by bde, a few other tweaks to get the patch to apply cleanly again and
some improvements to the comments.
This change closes some fairly minor security holes associated with
F_SETOWN, fixes a few bugs, and removes some limitations that F_SETOWN
had on tty devices. For more details, see the description on the PR.
Because this patch increases the size of the proc and pgrp structures,
it is necessary to re-install the includes and recompile libkvm,
the vinum lkm, fstat, gcore, gdb, ipfilter, ps, top, and w.
PR: kern/7899
Reviewed by: bde, elvind
1998-11-11 10:04:13 +00:00
|
|
|
funsetown(tp->tun_sigio);
|
1995-02-26 12:18:08 +00:00
|
|
|
selwakeup(&tp->tun_rsel);
|
1995-05-30 08:16:23 +00:00
|
|
|
|
1995-01-31 06:15:49 +00:00
|
|
|
TUNDEBUG ("%s%d: closed\n", ifp->if_name, ifp->if_unit);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
1999-08-15 09:54:57 +00:00
|
|
|
tuninit(ifp)
|
|
|
|
struct ifnet *ifp;
|
1995-01-31 06:15:49 +00:00
|
|
|
{
|
1999-08-15 09:54:57 +00:00
|
|
|
struct tun_softc *tp = ifp->if_softc;
|
1995-01-31 06:15:49 +00:00
|
|
|
register struct ifaddr *ifa;
|
|
|
|
|
|
|
|
TUNDEBUG("%s%d: tuninit\n", ifp->if_name, ifp->if_unit);
|
|
|
|
|
|
|
|
ifp->if_flags |= IFF_UP | IFF_RUNNING;
|
1998-04-06 11:43:12 +00:00
|
|
|
getmicrotime(&ifp->if_lastchange);
|
1995-01-31 06:15:49 +00:00
|
|
|
|
1996-12-13 21:29:07 +00:00
|
|
|
for (ifa = ifp->if_addrhead.tqh_first; ifa;
|
1998-01-08 23:42:31 +00:00
|
|
|
ifa = ifa->ifa_link.tqe_next) {
|
|
|
|
#ifdef INET
|
1995-02-26 12:18:08 +00:00
|
|
|
if (ifa->ifa_addr->sa_family == AF_INET) {
|
|
|
|
struct sockaddr_in *si;
|
1995-01-31 06:15:49 +00:00
|
|
|
|
1995-02-26 12:18:08 +00:00
|
|
|
si = (struct sockaddr_in *)ifa->ifa_addr;
|
|
|
|
if (si && si->sin_addr.s_addr)
|
|
|
|
tp->tun_flags |= TUN_IASET;
|
1995-01-31 06:15:49 +00:00
|
|
|
|
1995-02-26 12:18:08 +00:00
|
|
|
si = (struct sockaddr_in *)ifa->ifa_dstaddr;
|
|
|
|
if (si && si->sin_addr.s_addr)
|
|
|
|
tp->tun_flags |= TUN_DSTADDR;
|
|
|
|
}
|
1998-01-08 23:42:31 +00:00
|
|
|
#endif
|
|
|
|
}
|
1995-01-31 06:15:49 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Process an ioctl request.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
tunifioctl(ifp, cmd, data)
|
|
|
|
struct ifnet *ifp;
|
1998-06-07 17:13:14 +00:00
|
|
|
u_long cmd;
|
1995-01-31 06:15:49 +00:00
|
|
|
caddr_t data;
|
|
|
|
{
|
1999-06-19 18:42:31 +00:00
|
|
|
struct ifreq *ifr = (struct ifreq *)data;
|
1999-08-15 09:54:57 +00:00
|
|
|
struct tun_softc *tp = ifp->if_softc;
|
1999-06-19 18:42:31 +00:00
|
|
|
struct ifstat *ifs;
|
1995-01-31 06:15:49 +00:00
|
|
|
int error = 0, s;
|
|
|
|
|
|
|
|
s = splimp();
|
|
|
|
switch(cmd) {
|
1999-06-19 18:42:31 +00:00
|
|
|
case SIOCGIFSTATUS:
|
|
|
|
ifs = (struct ifstat *)data;
|
|
|
|
if (tp->tun_pid)
|
|
|
|
sprintf(ifs->ascii + strlen(ifs->ascii),
|
|
|
|
"\tOpened by PID %d\n", tp->tun_pid);
|
|
|
|
return(0);
|
1995-01-31 06:15:49 +00:00
|
|
|
case SIOCSIFADDR:
|
1999-08-15 09:54:57 +00:00
|
|
|
tuninit(ifp);
|
1995-02-26 12:18:08 +00:00
|
|
|
TUNDEBUG("%s%d: address set\n",
|
|
|
|
ifp->if_name, ifp->if_unit);
|
1995-01-31 06:15:49 +00:00
|
|
|
break;
|
|
|
|
case SIOCSIFDSTADDR:
|
1999-08-15 09:54:57 +00:00
|
|
|
tuninit(ifp);
|
1995-02-26 12:18:08 +00:00
|
|
|
TUNDEBUG("%s%d: destination address set\n",
|
|
|
|
ifp->if_name, ifp->if_unit);
|
1995-01-31 06:15:49 +00:00
|
|
|
break;
|
1996-12-16 19:23:34 +00:00
|
|
|
case SIOCSIFMTU:
|
1999-08-06 16:52:04 +00:00
|
|
|
ifp->if_mtu = ifr->ifr_mtu;
|
|
|
|
TUNDEBUG("%s%d: mtu set\n",
|
|
|
|
ifp->if_name, ifp->if_unit);
|
1996-12-16 19:23:34 +00:00
|
|
|
break;
|
1995-09-25 16:57:54 +00:00
|
|
|
case SIOCADDMULTI:
|
|
|
|
case SIOCDELMULTI:
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
1995-01-31 06:15:49 +00:00
|
|
|
default:
|
|
|
|
error = EINVAL;
|
|
|
|
}
|
|
|
|
splx(s);
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* tunoutput - queue packets from higher level ready to put out.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
tunoutput(ifp, m0, dst, rt)
|
|
|
|
struct ifnet *ifp;
|
|
|
|
struct mbuf *m0;
|
|
|
|
struct sockaddr *dst;
|
|
|
|
struct rtentry *rt;
|
|
|
|
{
|
1999-08-15 09:54:57 +00:00
|
|
|
struct tun_softc *tp = ifp->if_softc;
|
1995-01-31 06:15:49 +00:00
|
|
|
int s;
|
|
|
|
|
|
|
|
TUNDEBUG ("%s%d: tunoutput\n", ifp->if_name, ifp->if_unit);
|
|
|
|
|
|
|
|
if ((tp->tun_flags & TUN_READY) != TUN_READY) {
|
|
|
|
TUNDEBUG ("%s%d: not ready 0%o\n", ifp->if_name,
|
|
|
|
ifp->if_unit, tp->tun_flags);
|
|
|
|
m_freem (m0);
|
|
|
|
return EHOSTDOWN;
|
|
|
|
}
|
|
|
|
|
1995-09-25 16:57:54 +00:00
|
|
|
/* BPF write needs to be handled specially */
|
|
|
|
if (dst->sa_family == AF_UNSPEC) {
|
|
|
|
dst->sa_family = *(mtod(m0, int *));
|
|
|
|
m0->m_len -= sizeof(int);
|
|
|
|
m0->m_pkthdr.len -= sizeof(int);
|
|
|
|
m0->m_data += sizeof(int);
|
|
|
|
}
|
|
|
|
|
1996-02-06 18:51:28 +00:00
|
|
|
if (ifp->if_bpf) {
|
1995-01-31 06:15:49 +00:00
|
|
|
/*
|
|
|
|
* We need to prepend the address family as
|
|
|
|
* a four byte field. Cons up a dummy header
|
|
|
|
* to pacify bpf. This is safe because bpf
|
|
|
|
* will only read from the mbuf (i.e., it won't
|
|
|
|
* try to free it or keep a pointer to it).
|
|
|
|
*/
|
|
|
|
struct mbuf m;
|
|
|
|
u_int af = dst->sa_family;
|
|
|
|
|
|
|
|
m.m_next = m0;
|
|
|
|
m.m_len = 4;
|
|
|
|
m.m_data = (char *)⁡
|
|
|
|
|
1996-02-06 18:51:28 +00:00
|
|
|
bpf_mtap(ifp, &m);
|
1995-01-31 06:15:49 +00:00
|
|
|
}
|
1999-03-24 21:20:12 +00:00
|
|
|
|
|
|
|
/* prepend sockaddr? this may abort if the mbuf allocation fails */
|
|
|
|
if (tp->tun_flags & TUN_LMODE) {
|
|
|
|
/* allocate space for sockaddr */
|
|
|
|
M_PREPEND(m0, dst->sa_len, M_DONTWAIT);
|
|
|
|
|
|
|
|
/* if allocation failed drop packet */
|
|
|
|
if (m0 == NULL){
|
|
|
|
s = splimp(); /* spl on queue manipulation */
|
|
|
|
IF_DROP(&ifp->if_snd);
|
|
|
|
splx(s);
|
|
|
|
ifp->if_oerrors++;
|
|
|
|
return (ENOBUFS);
|
|
|
|
} else {
|
|
|
|
bcopy(dst, m0->m_data, dst->sa_len);
|
|
|
|
}
|
|
|
|
}
|
1995-01-31 06:15:49 +00:00
|
|
|
|
|
|
|
switch(dst->sa_family) {
|
|
|
|
#ifdef INET
|
|
|
|
case AF_INET:
|
|
|
|
s = splimp();
|
|
|
|
if (IF_QFULL(&ifp->if_snd)) {
|
|
|
|
IF_DROP(&ifp->if_snd);
|
|
|
|
m_freem(m0);
|
|
|
|
splx(s);
|
|
|
|
ifp->if_collisions++;
|
|
|
|
return (ENOBUFS);
|
|
|
|
}
|
1996-06-09 17:24:25 +00:00
|
|
|
ifp->if_obytes += m0->m_pkthdr.len;
|
1995-01-31 06:15:49 +00:00
|
|
|
IF_ENQUEUE(&ifp->if_snd, m0);
|
|
|
|
splx(s);
|
|
|
|
ifp->if_opackets++;
|
|
|
|
break;
|
|
|
|
#endif
|
|
|
|
default:
|
|
|
|
m_freem(m0);
|
|
|
|
return EAFNOSUPPORT;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (tp->tun_flags & TUN_RWAIT) {
|
|
|
|
tp->tun_flags &= ~TUN_RWAIT;
|
|
|
|
wakeup((caddr_t)tp);
|
|
|
|
}
|
Installed the second patch attached to kern/7899 with some changes suggested
by bde, a few other tweaks to get the patch to apply cleanly again and
some improvements to the comments.
This change closes some fairly minor security holes associated with
F_SETOWN, fixes a few bugs, and removes some limitations that F_SETOWN
had on tty devices. For more details, see the description on the PR.
Because this patch increases the size of the proc and pgrp structures,
it is necessary to re-install the includes and recompile libkvm,
the vinum lkm, fstat, gcore, gdb, ipfilter, ps, top, and w.
PR: kern/7899
Reviewed by: bde, elvind
1998-11-11 10:04:13 +00:00
|
|
|
if (tp->tun_flags & TUN_ASYNC && tp->tun_sigio)
|
|
|
|
pgsigio(tp->tun_sigio, SIGIO, 0);
|
1995-02-26 12:18:08 +00:00
|
|
|
selwakeup(&tp->tun_rsel);
|
1995-01-31 06:15:49 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* the cdevsw interface is now pretty minimal.
|
|
|
|
*/
|
1995-12-08 11:19:42 +00:00
|
|
|
static int
|
1995-02-26 12:18:08 +00:00
|
|
|
tunioctl(dev, cmd, data, flag, p)
|
1995-01-31 06:15:49 +00:00
|
|
|
dev_t dev;
|
1998-06-07 17:13:14 +00:00
|
|
|
u_long cmd;
|
1995-01-31 06:15:49 +00:00
|
|
|
caddr_t data;
|
|
|
|
int flag;
|
1995-02-26 12:18:08 +00:00
|
|
|
struct proc *p;
|
1995-01-31 06:15:49 +00:00
|
|
|
{
|
1999-08-15 09:54:57 +00:00
|
|
|
int s;
|
|
|
|
struct tun_softc *tp = dev->si_drv1;
|
1995-02-26 12:18:08 +00:00
|
|
|
struct tuninfo *tunp;
|
1995-01-31 06:15:49 +00:00
|
|
|
|
|
|
|
switch (cmd) {
|
1995-02-26 12:18:08 +00:00
|
|
|
case TUNSIFINFO:
|
|
|
|
tunp = (struct tuninfo *)data;
|
1999-08-06 16:52:04 +00:00
|
|
|
if (tunp->mtu < IF_MINMTU)
|
1999-08-06 13:53:03 +00:00
|
|
|
return (EINVAL);
|
1995-02-26 12:18:08 +00:00
|
|
|
tp->tun_if.if_mtu = tunp->mtu;
|
|
|
|
tp->tun_if.if_type = tunp->type;
|
|
|
|
tp->tun_if.if_baudrate = tunp->baudrate;
|
|
|
|
break;
|
|
|
|
case TUNGIFINFO:
|
|
|
|
tunp = (struct tuninfo *)data;
|
|
|
|
tunp->mtu = tp->tun_if.if_mtu;
|
|
|
|
tunp->type = tp->tun_if.if_type;
|
|
|
|
tunp->baudrate = tp->tun_if.if_baudrate;
|
|
|
|
break;
|
1995-01-31 06:15:49 +00:00
|
|
|
case TUNSDEBUG:
|
|
|
|
tundebug = *(int *)data;
|
|
|
|
break;
|
|
|
|
case TUNGDEBUG:
|
|
|
|
*(int *)data = tundebug;
|
|
|
|
break;
|
1999-03-24 21:20:12 +00:00
|
|
|
case TUNSLMODE:
|
|
|
|
if (*(int *)data)
|
|
|
|
tp->tun_flags |= TUN_LMODE;
|
|
|
|
else
|
|
|
|
tp->tun_flags &= ~TUN_LMODE;
|
|
|
|
break;
|
|
|
|
case TUNSIFMODE:
|
|
|
|
/* deny this if UP */
|
|
|
|
if (tp->tun_if.if_flags & IFF_UP)
|
|
|
|
return(EBUSY);
|
|
|
|
|
|
|
|
switch (*(int *)data) {
|
|
|
|
case IFF_POINTOPOINT:
|
|
|
|
tp->tun_if.if_flags |= IFF_POINTOPOINT;
|
|
|
|
tp->tun_if.if_flags &= ~IFF_BROADCAST;
|
|
|
|
break;
|
|
|
|
case IFF_BROADCAST:
|
|
|
|
tp->tun_if.if_flags &= ~IFF_POINTOPOINT;
|
|
|
|
tp->tun_if.if_flags |= IFF_BROADCAST;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return(EINVAL);
|
|
|
|
}
|
|
|
|
break;
|
1995-01-31 06:15:49 +00:00
|
|
|
case FIONBIO:
|
|
|
|
break;
|
|
|
|
case FIOASYNC:
|
|
|
|
if (*(int *)data)
|
|
|
|
tp->tun_flags |= TUN_ASYNC;
|
|
|
|
else
|
|
|
|
tp->tun_flags &= ~TUN_ASYNC;
|
|
|
|
break;
|
|
|
|
case FIONREAD:
|
|
|
|
s = splimp();
|
1995-12-11 13:24:58 +00:00
|
|
|
if (tp->tun_if.if_snd.ifq_head) {
|
|
|
|
struct mbuf *mb = tp->tun_if.if_snd.ifq_head;
|
|
|
|
for( *(int *)data = 0; mb != 0; mb = mb->m_next)
|
|
|
|
*(int *)data += mb->m_len;
|
|
|
|
} else
|
1995-01-31 06:15:49 +00:00
|
|
|
*(int *)data = 0;
|
|
|
|
splx(s);
|
|
|
|
break;
|
Installed the second patch attached to kern/7899 with some changes suggested
by bde, a few other tweaks to get the patch to apply cleanly again and
some improvements to the comments.
This change closes some fairly minor security holes associated with
F_SETOWN, fixes a few bugs, and removes some limitations that F_SETOWN
had on tty devices. For more details, see the description on the PR.
Because this patch increases the size of the proc and pgrp structures,
it is necessary to re-install the includes and recompile libkvm,
the vinum lkm, fstat, gcore, gdb, ipfilter, ps, top, and w.
PR: kern/7899
Reviewed by: bde, elvind
1998-11-11 10:04:13 +00:00
|
|
|
case FIOSETOWN:
|
|
|
|
return (fsetown(*(int *)data, &tp->tun_sigio));
|
|
|
|
|
|
|
|
case FIOGETOWN:
|
|
|
|
*(int *)data = fgetown(tp->tun_sigio);
|
|
|
|
return (0);
|
|
|
|
|
|
|
|
/* This is deprecated, FIOSETOWN should be used instead. */
|
1995-01-31 06:15:49 +00:00
|
|
|
case TIOCSPGRP:
|
Installed the second patch attached to kern/7899 with some changes suggested
by bde, a few other tweaks to get the patch to apply cleanly again and
some improvements to the comments.
This change closes some fairly minor security holes associated with
F_SETOWN, fixes a few bugs, and removes some limitations that F_SETOWN
had on tty devices. For more details, see the description on the PR.
Because this patch increases the size of the proc and pgrp structures,
it is necessary to re-install the includes and recompile libkvm,
the vinum lkm, fstat, gcore, gdb, ipfilter, ps, top, and w.
PR: kern/7899
Reviewed by: bde, elvind
1998-11-11 10:04:13 +00:00
|
|
|
return (fsetown(-(*(int *)data), &tp->tun_sigio));
|
|
|
|
|
|
|
|
/* This is deprecated, FIOGETOWN should be used instead. */
|
1995-01-31 06:15:49 +00:00
|
|
|
case TIOCGPGRP:
|
Installed the second patch attached to kern/7899 with some changes suggested
by bde, a few other tweaks to get the patch to apply cleanly again and
some improvements to the comments.
This change closes some fairly minor security holes associated with
F_SETOWN, fixes a few bugs, and removes some limitations that F_SETOWN
had on tty devices. For more details, see the description on the PR.
Because this patch increases the size of the proc and pgrp structures,
it is necessary to re-install the includes and recompile libkvm,
the vinum lkm, fstat, gcore, gdb, ipfilter, ps, top, and w.
PR: kern/7899
Reviewed by: bde, elvind
1998-11-11 10:04:13 +00:00
|
|
|
*(int *)data = -fgetown(tp->tun_sigio);
|
|
|
|
return (0);
|
|
|
|
|
1995-01-31 06:15:49 +00:00
|
|
|
default:
|
|
|
|
return (ENOTTY);
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* The cdevsw read interface - reads a packet at a time, or at
|
|
|
|
* least as much of a packet as can be read.
|
|
|
|
*/
|
1995-12-08 11:19:42 +00:00
|
|
|
static int
|
1997-11-18 16:36:15 +00:00
|
|
|
tunread(dev, uio, flag)
|
|
|
|
dev_t dev;
|
|
|
|
struct uio *uio;
|
|
|
|
int flag;
|
1995-01-31 06:15:49 +00:00
|
|
|
{
|
1999-08-15 09:54:57 +00:00
|
|
|
struct tun_softc *tp = dev->si_drv1;
|
1995-01-31 06:15:49 +00:00
|
|
|
struct ifnet *ifp = &tp->tun_if;
|
|
|
|
struct mbuf *m, *m0;
|
|
|
|
int error=0, len, s;
|
|
|
|
|
|
|
|
TUNDEBUG ("%s%d: read\n", ifp->if_name, ifp->if_unit);
|
|
|
|
if ((tp->tun_flags & TUN_READY) != TUN_READY) {
|
|
|
|
TUNDEBUG ("%s%d: not ready 0%o\n", ifp->if_name,
|
|
|
|
ifp->if_unit, tp->tun_flags);
|
|
|
|
return EHOSTDOWN;
|
|
|
|
}
|
|
|
|
|
|
|
|
tp->tun_flags &= ~TUN_RWAIT;
|
|
|
|
|
|
|
|
s = splimp();
|
|
|
|
do {
|
|
|
|
IF_DEQUEUE(&ifp->if_snd, m0);
|
|
|
|
if (m0 == 0) {
|
1997-11-18 16:36:15 +00:00
|
|
|
if (flag & IO_NDELAY) {
|
1995-01-31 06:15:49 +00:00
|
|
|
splx(s);
|
|
|
|
return EWOULDBLOCK;
|
|
|
|
}
|
|
|
|
tp->tun_flags |= TUN_RWAIT;
|
1999-01-27 22:42:27 +00:00
|
|
|
if((error = tsleep((caddr_t)tp, PCATCH | (PZERO + 1),
|
|
|
|
"tunread", 0)) != 0) {
|
1996-12-02 21:07:33 +00:00
|
|
|
splx(s);
|
|
|
|
return error;
|
|
|
|
}
|
1995-01-31 06:15:49 +00:00
|
|
|
}
|
|
|
|
} while (m0 == 0);
|
|
|
|
splx(s);
|
|
|
|
|
|
|
|
while (m0 && uio->uio_resid > 0 && error == 0) {
|
1995-02-26 12:18:08 +00:00
|
|
|
len = min(uio->uio_resid, m0->m_len);
|
1995-01-31 06:15:49 +00:00
|
|
|
if (len == 0)
|
|
|
|
break;
|
|
|
|
error = uiomove(mtod(m0, caddr_t), len, uio);
|
|
|
|
MFREE(m0, m);
|
|
|
|
m0 = m;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (m0) {
|
|
|
|
TUNDEBUG("Dropping mbuf\n");
|
|
|
|
m_freem(m0);
|
|
|
|
}
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* the cdevsw write interface - an atomic write is a packet - or else!
|
|
|
|
*/
|
1995-12-08 11:19:42 +00:00
|
|
|
static int
|
1997-11-18 16:36:15 +00:00
|
|
|
tunwrite(dev, uio, flag)
|
|
|
|
dev_t dev;
|
|
|
|
struct uio *uio;
|
|
|
|
int flag;
|
1995-01-31 06:15:49 +00:00
|
|
|
{
|
1999-08-15 09:54:57 +00:00
|
|
|
struct tun_softc *tp = dev->si_drv1;
|
|
|
|
struct ifnet *ifp = &tp->tun_if;
|
1995-01-31 06:15:49 +00:00
|
|
|
struct mbuf *top, **mp, *m;
|
|
|
|
int error=0, s, tlen, mlen;
|
|
|
|
|
|
|
|
TUNDEBUG("%s%d: tunwrite\n", ifp->if_name, ifp->if_unit);
|
|
|
|
|
1999-07-26 12:11:10 +00:00
|
|
|
if (uio->uio_resid == 0)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (uio->uio_resid < 0 || uio->uio_resid > TUNMRU) {
|
1995-01-31 06:15:49 +00:00
|
|
|
TUNDEBUG("%s%d: len=%d!\n", ifp->if_name, ifp->if_unit,
|
|
|
|
uio->uio_resid);
|
|
|
|
return EIO;
|
|
|
|
}
|
|
|
|
tlen = uio->uio_resid;
|
|
|
|
|
|
|
|
/* get a header mbuf */
|
|
|
|
MGETHDR(m, M_DONTWAIT, MT_DATA);
|
|
|
|
if (m == NULL)
|
|
|
|
return ENOBUFS;
|
|
|
|
mlen = MHLEN;
|
|
|
|
|
|
|
|
top = 0;
|
|
|
|
mp = ⊤
|
|
|
|
while (error == 0 && uio->uio_resid > 0) {
|
1995-02-26 12:18:08 +00:00
|
|
|
m->m_len = min(mlen, uio->uio_resid);
|
1995-01-31 06:15:49 +00:00
|
|
|
error = uiomove(mtod (m, caddr_t), m->m_len, uio);
|
|
|
|
*mp = m;
|
|
|
|
mp = &m->m_next;
|
|
|
|
if (uio->uio_resid > 0) {
|
|
|
|
MGET (m, M_DONTWAIT, MT_DATA);
|
|
|
|
if (m == 0) {
|
|
|
|
error = ENOBUFS;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
mlen = MLEN;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (error) {
|
|
|
|
if (top)
|
|
|
|
m_freem (top);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
top->m_pkthdr.len = tlen;
|
|
|
|
top->m_pkthdr.rcvif = ifp;
|
|
|
|
|
1996-02-06 18:51:28 +00:00
|
|
|
if (ifp->if_bpf) {
|
1995-01-31 06:15:49 +00:00
|
|
|
/*
|
|
|
|
* We need to prepend the address family as
|
|
|
|
* a four byte field. Cons up a dummy header
|
|
|
|
* to pacify bpf. This is safe because bpf
|
|
|
|
* will only read from the mbuf (i.e., it won't
|
|
|
|
* try to free it or keep a pointer to it).
|
|
|
|
*/
|
|
|
|
struct mbuf m;
|
|
|
|
u_int af = AF_INET;
|
|
|
|
|
|
|
|
m.m_next = top;
|
|
|
|
m.m_len = 4;
|
|
|
|
m.m_data = (char *)⁡
|
|
|
|
|
1996-02-06 18:51:28 +00:00
|
|
|
bpf_mtap(ifp, &m);
|
1995-01-31 06:15:49 +00:00
|
|
|
}
|
|
|
|
|
1998-01-08 23:42:31 +00:00
|
|
|
#ifdef INET
|
1995-01-31 06:15:49 +00:00
|
|
|
s = splimp();
|
|
|
|
if (IF_QFULL (&ipintrq)) {
|
|
|
|
IF_DROP(&ipintrq);
|
|
|
|
splx(s);
|
|
|
|
ifp->if_collisions++;
|
|
|
|
m_freem(top);
|
|
|
|
return ENOBUFS;
|
|
|
|
}
|
|
|
|
IF_ENQUEUE(&ipintrq, top);
|
|
|
|
splx(s);
|
1996-06-09 17:24:25 +00:00
|
|
|
ifp->if_ibytes += tlen;
|
1995-01-31 06:15:49 +00:00
|
|
|
ifp->if_ipackets++;
|
|
|
|
schednetisr(NETISR_IP);
|
1998-01-08 23:42:31 +00:00
|
|
|
#endif
|
1995-01-31 06:15:49 +00:00
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
1997-09-14 03:09:01 +00:00
|
|
|
* tunpoll - the poll interface, this is only useful on reads
|
1995-01-31 06:15:49 +00:00
|
|
|
* really. The write detect always returns true, write never blocks
|
|
|
|
* anyway, it either accepts the packet or drops it.
|
|
|
|
*/
|
1995-12-08 11:19:42 +00:00
|
|
|
static int
|
1997-11-18 16:36:15 +00:00
|
|
|
tunpoll(dev, events, p)
|
|
|
|
dev_t dev;
|
|
|
|
int events;
|
|
|
|
struct proc *p;
|
1995-01-31 06:15:49 +00:00
|
|
|
{
|
1999-08-15 09:54:57 +00:00
|
|
|
int s;
|
|
|
|
struct tun_softc *tp = dev->si_drv1;
|
1995-01-31 06:15:49 +00:00
|
|
|
struct ifnet *ifp = &tp->tun_if;
|
1997-09-14 03:09:01 +00:00
|
|
|
int revents = 0;
|
1995-01-31 06:15:49 +00:00
|
|
|
|
|
|
|
s = splimp();
|
1997-09-14 03:09:01 +00:00
|
|
|
TUNDEBUG("%s%d: tunpoll\n", ifp->if_name, ifp->if_unit);
|
1995-02-26 12:18:08 +00:00
|
|
|
|
1999-05-06 18:13:11 +00:00
|
|
|
if (events & (POLLIN | POLLRDNORM)) {
|
1995-01-31 06:15:49 +00:00
|
|
|
if (ifp->if_snd.ifq_len > 0) {
|
1997-09-14 03:09:01 +00:00
|
|
|
TUNDEBUG("%s%d: tunpoll q=%d\n", ifp->if_name,
|
1995-01-31 06:15:49 +00:00
|
|
|
ifp->if_unit, ifp->if_snd.ifq_len);
|
1997-09-14 03:09:01 +00:00
|
|
|
revents |= events & (POLLIN | POLLRDNORM);
|
|
|
|
} else {
|
|
|
|
TUNDEBUG("%s%d: tunpoll waiting\n", ifp->if_name,
|
|
|
|
ifp->if_unit);
|
|
|
|
selrecord(p, &tp->tun_rsel);
|
1995-01-31 06:15:49 +00:00
|
|
|
}
|
1999-05-06 18:13:11 +00:00
|
|
|
}
|
1997-09-14 03:09:01 +00:00
|
|
|
if (events & (POLLOUT | POLLWRNORM))
|
|
|
|
revents |= events & (POLLOUT | POLLWRNORM);
|
|
|
|
|
1995-01-31 06:15:49 +00:00
|
|
|
splx(s);
|
1997-09-14 03:09:01 +00:00
|
|
|
return (revents);
|
1995-01-31 06:15:49 +00:00
|
|
|
}
|