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if_ppp.c
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if_ppp.c
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/* $NetBSD: if_ppp.c,v 1.111.4.2 2007/03/12 05:59:12 rmind Exp $ */
/* Id: if_ppp.c,v 1.6 1997/03/04 03:33:00 paulus Exp */
/*
* if_ppp.c - Point-to-Point Protocol (PPP) Asynchronous driver.
*
* Copyright (c) 1984-2000 Carnegie Mellon University. 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. The name "Carnegie Mellon University" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For permission or any legal
* details, please contact
* Office of Technology Transfer
* Carnegie Mellon University
* 5000 Forbes Avenue
* Pittsburgh, PA 15213-3890
* (412) 268-4387, fax: (412) 268-7395
* tech-transfer@andrew.cmu.edu
*
* 4. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by Computing Services
* at Carnegie Mellon University (http://www.cmu.edu/computing/)."
*
* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Based on:
* @(#)if_sl.c 7.6.1.2 (Berkeley) 2/15/89
*
* Copyright (c) 1987 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Serial Line interface
*
* Rick Adams
* Center for Seismic Studies
* 1300 N 17th Street, Suite 1450
* Arlington, Virginia 22209
* (703)276-7900
* rick@seismo.ARPA
* seismo!rick
*
* Pounded on heavily by Chris Torek (chris@mimsy.umd.edu, umcp-cs!chris).
* Converted to 4.3BSD Beta by Chris Torek.
* Other changes made at Berkeley, based in part on code by Kirk Smith.
*
* Converted to 4.3BSD+ 386BSD by Brad Parker (brad@cayman.com)
* Added VJ tcp header compression; more unified ioctls
*
* Extensively modified by Paul Mackerras (paulus@cs.anu.edu.au).
* Cleaned up a lot of the mbuf-related code to fix bugs that
* caused system crashes and packet corruption. Changed pppstart
* so that it doesn't just give up with a collision if the whole
* packet doesn't fit in the output ring buffer.
*
* Added priority queueing for interactive IP packets, following
* the model of if_sl.c, plus hooks for bpf.
* Paul Mackerras (paulus@cs.anu.edu.au).
*/
/* from if_sl.c,v 1.11 84/10/04 12:54:47 rick Exp */
/* from NetBSD: if_ppp.c,v 1.15.2.2 1994/07/28 05:17:58 cgd Exp */
/*
* XXX IMP ME HARDER
*
* This is an explanation of that comment. This code used to use
* splimp() to block both network and tty interrupts. However,
* that call is deprecated. So, we have replaced the uses of
* splimp() with splhigh() in order to applomplish what it needs
* to accomplish, and added that happy little comment.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_ppp.c,v 1.111.4.2 2007/03/12 05:59:12 rmind Exp $");
#include "ppp.h"
#include "opt_inet.h"
#include "opt_gateway.h"
#include "opt_ppp.h"
#ifdef INET
#define VJC
#endif
#define PPP_COMPRESS
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <sys/kauth.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/netisr.h>
#include <net/route.h>
#ifdef PPP_FILTER
#include <net/bpf.h>
#endif
#include <machine/intr.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#ifdef INET
#include <netinet/ip.h>
#endif
#include "bpfilter.h"
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
#if defined(PPP_FILTER) || NBPFILTER > 0
#include <net/slip.h>
#endif
#ifdef VJC
#include <net/slcompress.h>
#endif
#include <net/ppp_defs.h>
#include <net/if_ppp.h>
#include <net/if_pppvar.h>
#include <machine/cpu.h>
#ifdef PPP_COMPRESS
#define PACKETPTR struct mbuf *
#include <net/ppp-comp.h>
#endif
static int pppsioctl(struct ifnet *, u_long, void *);
static void ppp_requeue(struct ppp_softc *);
static void ppp_ccp(struct ppp_softc *, struct mbuf *m, int rcvd);
static void ppp_ccp_closed(struct ppp_softc *);
static void ppp_inproc(struct ppp_softc *, struct mbuf *);
static void pppdumpm(struct mbuf *m0);
#ifdef ALTQ
static void ppp_ifstart(struct ifnet *ifp);
#endif
#ifndef __HAVE_GENERIC_SOFT_INTERRUPTS
void pppnetisr(void);
#endif
static void pppintr(void *);
/*
* Some useful mbuf macros not in mbuf.h.
*/
#define M_IS_CLUSTER(m) ((m)->m_flags & M_EXT)
#define M_DATASTART(m) \
(M_IS_CLUSTER(m) ? (m)->m_ext.ext_buf : \
(m)->m_flags & M_PKTHDR ? (m)->m_pktdat : (m)->m_dat)
#define M_DATASIZE(m) \
(M_IS_CLUSTER(m) ? (m)->m_ext.ext_size : \
(m)->m_flags & M_PKTHDR ? MHLEN: MLEN)
/*
* We define two link layer specific mbuf flags, to mark high-priority
* packets for output, and received packets following lost/corrupted
* packets.
*/
#define M_HIGHPRI M_LINK0 /* output packet for sc_fastq */
#define M_ERRMARK M_LINK1 /* rx packet following lost/corrupted pkt */
static int ppp_clone_create(struct if_clone *, int);
static int ppp_clone_destroy(struct ifnet *);
static struct ppp_softc *ppp_create(const char *, int);
static LIST_HEAD(, ppp_softc) ppp_softc_list;
struct if_clone ppp_cloner =
IF_CLONE_INITIALIZER("ppp", ppp_clone_create, ppp_clone_destroy);
static struct simplelock ppp_list_mutex = SIMPLELOCK_INITIALIZER;
#ifdef PPP_COMPRESS
/*
* List of compressors we know about.
* We leave some space so maybe we can modload compressors.
*/
extern struct compressor ppp_bsd_compress;
extern struct compressor ppp_deflate, ppp_deflate_draft;
struct compressor *ppp_compressors[PPP_COMPRESSORS_MAX] = {
#if DO_BSD_COMPRESS && defined(PPP_BSDCOMP)
&ppp_bsd_compress,
#endif
#if DO_DEFLATE && defined(PPP_DEFLATE)
&ppp_deflate,
&ppp_deflate_draft,
#endif
NULL
};
#endif /* PPP_COMPRESS */
/*
* Called from boot code to establish ppp interfaces.
*/
void
pppattach(void)
{
extern struct linesw ppp_disc;
if (ttyldisc_attach(&ppp_disc) != 0)
panic("pppattach");
LIST_INIT(&ppp_softc_list);
if_clone_attach(&ppp_cloner);
}
static struct ppp_softc *
ppp_create(const char *name, int unit)
{
struct ppp_softc *sc, *sci, *scl = NULL;
MALLOC(sc, struct ppp_softc *, sizeof(*sc), M_DEVBUF, M_WAIT|M_ZERO);
simple_lock(&ppp_list_mutex);
if (unit == -1) {
int i = 0;
LIST_FOREACH(sci, &ppp_softc_list, sc_iflist) {
scl = sci;
if (i < sci->sc_unit) {
unit = i;
break;
} else {
#ifdef DIAGNOSTIC
KASSERT(i == sci->sc_unit);
#endif
i++;
}
}
if (unit == -1)
unit = i;
} else {
LIST_FOREACH(sci, &ppp_softc_list, sc_iflist) {
scl = sci;
if (unit < sci->sc_unit)
break;
else if (unit == sci->sc_unit) {
FREE(sc, M_DEVBUF);
return NULL;
}
}
}
if (sci != NULL)
LIST_INSERT_BEFORE(sci, sc, sc_iflist);
else if (scl != NULL)
LIST_INSERT_AFTER(scl, sc, sc_iflist);
else
LIST_INSERT_HEAD(&ppp_softc_list, sc, sc_iflist);
simple_unlock(&ppp_list_mutex);
(void)snprintf(sc->sc_if.if_xname, sizeof(sc->sc_if.if_xname), "%s%d",
name, sc->sc_unit = unit);
callout_init(&sc->sc_timo_ch);
sc->sc_if.if_softc = sc;
sc->sc_if.if_mtu = PPP_MTU;
sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
sc->sc_if.if_type = IFT_PPP;
sc->sc_if.if_hdrlen = PPP_HDRLEN;
sc->sc_if.if_dlt = DLT_NULL;
sc->sc_if.if_ioctl = pppsioctl;
sc->sc_if.if_output = pppoutput;
#ifdef ALTQ
sc->sc_if.if_start = ppp_ifstart;
#endif
IFQ_SET_MAXLEN(&sc->sc_if.if_snd, IFQ_MAXLEN);
sc->sc_inq.ifq_maxlen = IFQ_MAXLEN;
sc->sc_fastq.ifq_maxlen = IFQ_MAXLEN;
sc->sc_rawq.ifq_maxlen = IFQ_MAXLEN;
/* Ratio of 1:2 packets between the regular and the fast queue */
sc->sc_maxfastq = 2;
IFQ_SET_READY(&sc->sc_if.if_snd);
if_attach(&sc->sc_if);
if_alloc_sadl(&sc->sc_if);
#if NBPFILTER > 0
bpfattach(&sc->sc_if, DLT_NULL, 0);
#endif
return sc;
}
static int
ppp_clone_create(struct if_clone *ifc, int unit)
{
return ppp_create(ifc->ifc_name, unit) == NULL ? EEXIST : 0;
}
static int
ppp_clone_destroy(struct ifnet *ifp)
{
struct ppp_softc *sc = (struct ppp_softc *)ifp->if_softc;
if (sc->sc_devp != NULL)
return EBUSY; /* Not removing it */
simple_lock(&ppp_list_mutex);
LIST_REMOVE(sc, sc_iflist);
simple_unlock(&ppp_list_mutex);
#if NBPFILTER > 0
bpfdetach(ifp);
#endif
if_detach(ifp);
FREE(sc, M_DEVBUF);
return 0;
}
/*
* Allocate a ppp interface unit and initialize it.
*/
struct ppp_softc *
pppalloc(pid_t pid)
{
struct ppp_softc *sc = NULL, *scf;
int i;
simple_lock(&ppp_list_mutex);
for (scf = LIST_FIRST(&ppp_softc_list); scf != NULL;
scf = LIST_NEXT(scf, sc_iflist)) {
if (scf->sc_xfer == pid) {
scf->sc_xfer = 0;
simple_unlock(&ppp_list_mutex);
return scf;
}
if (scf->sc_devp == NULL && sc == NULL)
sc = scf;
}
simple_unlock(&ppp_list_mutex);
if (sc == NULL)
sc = ppp_create(ppp_cloner.ifc_name, -1);
#ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
sc->sc_si = softintr_establish(IPL_SOFTNET, pppintr, sc);
if (sc->sc_si == NULL) {
printf("%s: unable to establish softintr\n", sc->sc_if.if_xname);
return (NULL);
}
#endif
sc->sc_flags = 0;
sc->sc_mru = PPP_MRU;
sc->sc_relinq = NULL;
(void)memset(&sc->sc_stats, 0, sizeof(sc->sc_stats));
#ifdef VJC
MALLOC(sc->sc_comp, struct slcompress *, sizeof(struct slcompress),
M_DEVBUF, M_NOWAIT);
if (sc->sc_comp)
sl_compress_init(sc->sc_comp);
#endif
#ifdef PPP_COMPRESS
sc->sc_xc_state = NULL;
sc->sc_rc_state = NULL;
#endif /* PPP_COMPRESS */
for (i = 0; i < NUM_NP; ++i)
sc->sc_npmode[i] = NPMODE_ERROR;
sc->sc_npqueue = NULL;
sc->sc_npqtail = &sc->sc_npqueue;
sc->sc_last_sent = sc->sc_last_recv = time_second;
return sc;
}
/*
* Deallocate a ppp unit. Must be called at splsoftnet or higher.
*/
void
pppdealloc(struct ppp_softc *sc)
{
struct mbuf *m;
#ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
softintr_disestablish(sc->sc_si);
#endif
if_down(&sc->sc_if);
sc->sc_if.if_flags &= ~(IFF_UP|IFF_RUNNING);
sc->sc_devp = NULL;
sc->sc_xfer = 0;
for (;;) {
IF_DEQUEUE(&sc->sc_rawq, m);
if (m == NULL)
break;
m_freem(m);
}
for (;;) {
IF_DEQUEUE(&sc->sc_inq, m);
if (m == NULL)
break;
m_freem(m);
}
for (;;) {
IF_DEQUEUE(&sc->sc_fastq, m);
if (m == NULL)
break;
m_freem(m);
}
while ((m = sc->sc_npqueue) != NULL) {
sc->sc_npqueue = m->m_nextpkt;
m_freem(m);
}
if (sc->sc_togo != NULL) {
m_freem(sc->sc_togo);
sc->sc_togo = NULL;
}
#ifdef PPP_COMPRESS
ppp_ccp_closed(sc);
sc->sc_xc_state = NULL;
sc->sc_rc_state = NULL;
#endif /* PPP_COMPRESS */
#ifdef PPP_FILTER
if (sc->sc_pass_filt_in.bf_insns != 0) {
FREE(sc->sc_pass_filt_in.bf_insns, M_DEVBUF);
sc->sc_pass_filt_in.bf_insns = 0;
sc->sc_pass_filt_in.bf_len = 0;
}
if (sc->sc_pass_filt_out.bf_insns != 0) {
FREE(sc->sc_pass_filt_out.bf_insns, M_DEVBUF);
sc->sc_pass_filt_out.bf_insns = 0;
sc->sc_pass_filt_out.bf_len = 0;
}
if (sc->sc_active_filt_in.bf_insns != 0) {
FREE(sc->sc_active_filt_in.bf_insns, M_DEVBUF);
sc->sc_active_filt_in.bf_insns = 0;
sc->sc_active_filt_in.bf_len = 0;
}
if (sc->sc_active_filt_out.bf_insns != 0) {
FREE(sc->sc_active_filt_out.bf_insns, M_DEVBUF);
sc->sc_active_filt_out.bf_insns = 0;
sc->sc_active_filt_out.bf_len = 0;
}
#endif /* PPP_FILTER */
#ifdef VJC
if (sc->sc_comp != 0) {
FREE(sc->sc_comp, M_DEVBUF);
sc->sc_comp = 0;
}
#endif
(void)ppp_clone_destroy(&sc->sc_if);
}
/*
* Ioctl routine for generic ppp devices.
*/
int
pppioctl(struct ppp_softc *sc, u_long cmd, void *data, int flag,
struct lwp *l)
{
int s, error, flags, mru, npx;
u_int nb;
struct ppp_option_data *odp;
struct compressor **cp;
struct npioctl *npi;
time_t t;
#ifdef PPP_FILTER
struct bpf_program *bp, *nbp;
struct bpf_insn *newcode, *oldcode;
int newcodelen;
#endif /* PPP_FILTER */
#ifdef PPP_COMPRESS
u_char ccp_option[CCP_MAX_OPTION_LENGTH];
#endif
switch (cmd) {
case PPPIOCSFLAGS:
case PPPIOCSMRU:
case PPPIOCSMAXCID:
case PPPIOCSCOMPRESS:
case PPPIOCSNPMODE:
if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_INTERFACE,
KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, &sc->sc_if, (void *)cmd,
NULL) != 0)
return (EPERM);
break;
case PPPIOCXFERUNIT:
/* XXX: Why is this privileged?! */
if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_INTERFACE,
KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, &sc->sc_if, (void *)cmd,
NULL) != 0)
return (EPERM);
break;
default:
break;
}
switch (cmd) {
case FIONREAD:
*(int *)data = sc->sc_inq.ifq_len;
break;
case PPPIOCGUNIT:
*(int *)data = sc->sc_unit;
break;
case PPPIOCGFLAGS:
*(u_int *)data = sc->sc_flags;
break;
case PPPIOCGRAWIN:
{
struct ppp_rawin *rwin = (struct ppp_rawin *)data;
u_char c, q = 0;
for (c = sc->sc_rawin_start; c < sizeof(sc->sc_rawin.buf);)
rwin->buf[q++] = sc->sc_rawin.buf[c++];
for (c = 0; c < sc->sc_rawin_start;)
rwin->buf[q++] = sc->sc_rawin.buf[c++];
rwin->count = sc->sc_rawin.count;
}
break;
case PPPIOCSFLAGS:
flags = *(int *)data & SC_MASK;
s = splsoftnet();
#ifdef PPP_COMPRESS
if (sc->sc_flags & SC_CCP_OPEN && !(flags & SC_CCP_OPEN))
ppp_ccp_closed(sc);
#endif
splhigh(); /* XXX IMP ME HARDER */
sc->sc_flags = (sc->sc_flags & ~SC_MASK) | flags;
splx(s);
break;
case PPPIOCSMRU:
mru = *(int *)data;
if (mru >= PPP_MINMRU && mru <= PPP_MAXMRU)
sc->sc_mru = mru;
break;
case PPPIOCGMRU:
*(int *)data = sc->sc_mru;
break;
#ifdef VJC
case PPPIOCSMAXCID:
if (sc->sc_comp) {
s = splsoftnet();
sl_compress_setup(sc->sc_comp, *(int *)data);
splx(s);
}
break;
#endif
case PPPIOCXFERUNIT:
sc->sc_xfer = l->l_proc->p_pid;
break;
#ifdef PPP_COMPRESS
case PPPIOCSCOMPRESS:
odp = (struct ppp_option_data *) data;
nb = odp->length;
if (nb > sizeof(ccp_option))
nb = sizeof(ccp_option);
if ((error = copyin(odp->ptr, ccp_option, nb)) != 0)
return (error);
if (ccp_option[1] < 2) /* preliminary check on the length byte */
return (EINVAL);
for (cp = ppp_compressors; *cp != NULL; ++cp)
if ((*cp)->compress_proto == ccp_option[0]) {
/*
* Found a handler for the protocol - try to allocate
* a compressor or decompressor.
*/
error = 0;
if (odp->transmit) {
s = splsoftnet();
if (sc->sc_xc_state != NULL)
(*sc->sc_xcomp->comp_free)(sc->sc_xc_state);
sc->sc_xcomp = *cp;
sc->sc_xc_state = (*cp)->comp_alloc(ccp_option, nb);
if (sc->sc_xc_state == NULL) {
if (sc->sc_flags & SC_DEBUG)
printf("%s: comp_alloc failed\n",
sc->sc_if.if_xname);
error = ENOBUFS;
}
splhigh(); /* XXX IMP ME HARDER */
sc->sc_flags &= ~SC_COMP_RUN;
splx(s);
} else {
s = splsoftnet();
if (sc->sc_rc_state != NULL)
(*sc->sc_rcomp->decomp_free)(sc->sc_rc_state);
sc->sc_rcomp = *cp;
sc->sc_rc_state = (*cp)->decomp_alloc(ccp_option, nb);
if (sc->sc_rc_state == NULL) {
if (sc->sc_flags & SC_DEBUG)
printf("%s: decomp_alloc failed\n",
sc->sc_if.if_xname);
error = ENOBUFS;
}
splhigh(); /* XXX IMP ME HARDER */
sc->sc_flags &= ~SC_DECOMP_RUN;
splx(s);
}
return (error);
}
if (sc->sc_flags & SC_DEBUG)
printf("%s: no compressor for [%x %x %x], %x\n",
sc->sc_if.if_xname, ccp_option[0], ccp_option[1],
ccp_option[2], nb);
return (EINVAL); /* no handler found */
#endif /* PPP_COMPRESS */
case PPPIOCGNPMODE:
case PPPIOCSNPMODE:
npi = (struct npioctl *) data;
switch (npi->protocol) {
case PPP_IP:
npx = NP_IP;
break;
case PPP_IPV6:
npx = NP_IPV6;
break;
default:
return EINVAL;
}
if (cmd == PPPIOCGNPMODE) {
npi->mode = sc->sc_npmode[npx];
} else {
if (npi->mode != sc->sc_npmode[npx]) {
s = splnet();
sc->sc_npmode[npx] = npi->mode;
if (npi->mode != NPMODE_QUEUE) {
ppp_requeue(sc);
ppp_restart(sc);
}
splx(s);
}
}
break;
case PPPIOCGIDLE:
s = splsoftnet();
t = time_second;
((struct ppp_idle *)data)->xmit_idle = t - sc->sc_last_sent;
((struct ppp_idle *)data)->recv_idle = t - sc->sc_last_recv;
splx(s);
break;
#ifdef PPP_FILTER
case PPPIOCSPASS:
case PPPIOCSACTIVE:
/* These are no longer supported. */
return EOPNOTSUPP;
case PPPIOCSIPASS:
case PPPIOCSOPASS:
case PPPIOCSIACTIVE:
case PPPIOCSOACTIVE:
nbp = (struct bpf_program *) data;
if ((unsigned) nbp->bf_len > BPF_MAXINSNS)
return EINVAL;
newcodelen = nbp->bf_len * sizeof(struct bpf_insn);
if (newcodelen != 0) {
newcode = malloc(newcodelen, M_DEVBUF, M_WAITOK);
/* WAITOK -- malloc() never fails. */
if ((error = copyin((void *)nbp->bf_insns, (void *)newcode,
newcodelen)) != 0) {
free(newcode, M_DEVBUF);
return error;
}
if (!bpf_validate(newcode, nbp->bf_len)) {
free(newcode, M_DEVBUF);
return EINVAL;
}
} else
newcode = 0;
switch (cmd) {
case PPPIOCSIPASS:
bp = &sc->sc_pass_filt_in;
break;
case PPPIOCSOPASS:
bp = &sc->sc_pass_filt_out;
break;
case PPPIOCSIACTIVE:
bp = &sc->sc_active_filt_in;
break;
case PPPIOCSOACTIVE:
bp = &sc->sc_active_filt_out;
break;
default:
free(newcode, M_DEVBUF);
return (EPASSTHROUGH);
}
oldcode = bp->bf_insns;
s = splnet();
bp->bf_len = nbp->bf_len;
bp->bf_insns = newcode;
splx(s);
if (oldcode != 0)
free(oldcode, M_DEVBUF);
break;
#endif /* PPP_FILTER */
default:
return (EPASSTHROUGH);
}
return (0);
}
/*
* Process an ioctl request to the ppp network interface.
*/
static int
pppsioctl(struct ifnet *ifp, u_long cmd, void *data)
{
struct lwp *l = curlwp; /* XXX */
struct ppp_softc *sc = ifp->if_softc;
struct ifaddr *ifa = (struct ifaddr *)data;
struct ifreq *ifr = (struct ifreq *)data;
struct ppp_stats *psp;
#ifdef PPP_COMPRESS
struct ppp_comp_stats *pcp;
#endif
int s = splnet(), error = 0;
switch (cmd) {
case SIOCSIFFLAGS:
if ((ifp->if_flags & IFF_RUNNING) == 0)
ifp->if_flags &= ~IFF_UP;
break;
case SIOCSIFADDR:
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
break;
#endif
#ifdef INET6
case AF_INET6:
break;
#endif
default:
error = EAFNOSUPPORT;
break;
}
break;
case SIOCSIFDSTADDR:
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
break;
#endif
#ifdef INET6
case AF_INET6:
break;
#endif
default:
error = EAFNOSUPPORT;
break;
}
break;
case SIOCSIFMTU:
if ((error = kauth_authorize_network(l->l_cred,
KAUTH_NETWORK_INTERFACE, KAUTH_REQ_NETWORK_INTERFACE_SETPRIV,
ifp, (void *)cmd, NULL) != 0))
break;
sc->sc_if.if_mtu = ifr->ifr_mtu;
break;
case SIOCGIFMTU:
ifr->ifr_mtu = sc->sc_if.if_mtu;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
if (ifr == 0) {
error = EAFNOSUPPORT;
break;
}
switch (ifr->ifr_addr.sa_family) {
#ifdef INET
case AF_INET:
break;
#endif
#ifdef INET6
case AF_INET6:
break;
#endif
default:
error = EAFNOSUPPORT;
break;
}
break;
case SIOCGPPPSTATS:
psp = &((struct ifpppstatsreq *) data)->stats;
memset(psp, 0, sizeof(*psp));
psp->p = sc->sc_stats;
#if defined(VJC) && !defined(SL_NO_STATS)
if (sc->sc_comp) {
psp->vj.vjs_packets = sc->sc_comp->sls_packets;
psp->vj.vjs_compressed = sc->sc_comp->sls_compressed;
psp->vj.vjs_searches = sc->sc_comp->sls_searches;
psp->vj.vjs_misses = sc->sc_comp->sls_misses;
psp->vj.vjs_uncompressedin = sc->sc_comp->sls_uncompressedin;
psp->vj.vjs_compressedin = sc->sc_comp->sls_compressedin;
psp->vj.vjs_errorin = sc->sc_comp->sls_errorin;
psp->vj.vjs_tossed = sc->sc_comp->sls_tossed;
}
#endif /* VJC */
break;
#ifdef PPP_COMPRESS
case SIOCGPPPCSTATS:
pcp = &((struct ifpppcstatsreq *) data)->stats;
memset(pcp, 0, sizeof(*pcp));
if (sc->sc_xc_state != NULL)
(*sc->sc_xcomp->comp_stat)(sc->sc_xc_state, &pcp->c);
if (sc->sc_rc_state != NULL)
(*sc->sc_rcomp->decomp_stat)(sc->sc_rc_state, &pcp->d);
break;
#endif /* PPP_COMPRESS */
default:
error = EINVAL;
}
splx(s);
return (error);
}
/*
* Queue a packet. Start transmission if not active.
* Packet is placed in Information field of PPP frame.
*/
int
pppoutput(struct ifnet *ifp, struct mbuf *m0, const struct sockaddr *dst,
struct rtentry *rtp)
{
struct ppp_softc *sc = ifp->if_softc;
int protocol, address, control;
u_char *cp;
int s, error;
#ifdef INET
struct ip *ip;
#endif
struct ifqueue *ifq;
enum NPmode mode;
int len;
ALTQ_DECL(struct altq_pktattr pktattr;)
if (sc->sc_devp == NULL || (ifp->if_flags & IFF_RUNNING) == 0
|| ((ifp->if_flags & IFF_UP) == 0 && dst->sa_family != AF_UNSPEC)) {
error = ENETDOWN; /* sort of */
goto bad;
}
IFQ_CLASSIFY(&ifp->if_snd, m0, dst->sa_family, &pktattr);
/*
* Compute PPP header.
*/
m0->m_flags &= ~M_HIGHPRI;
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
address = PPP_ALLSTATIONS;
control = PPP_UI;
protocol = PPP_IP;
mode = sc->sc_npmode[NP_IP];
/*
* If this packet has the "low delay" bit set in the IP header,
* put it on the fastq instead.
*/
ip = mtod(m0, struct ip *);
if (ip->ip_tos & IPTOS_LOWDELAY)
m0->m_flags |= M_HIGHPRI;
break;
#endif
#ifdef INET6
case AF_INET6:
address = PPP_ALLSTATIONS; /*XXX*/
control = PPP_UI; /*XXX*/
protocol = PPP_IPV6;
mode = sc->sc_npmode[NP_IPV6];
#if 0 /* XXX flowinfo/traffic class, maybe? */
/*
* If this packet has the "low delay" bit set in the IP header,
* put it on the fastq instead.
*/
ip = mtod(m0, struct ip *);
if (ip->ip_tos & IPTOS_LOWDELAY)
m0->m_flags |= M_HIGHPRI;
#endif
break;
#endif
case AF_UNSPEC:
address = PPP_ADDRESS(dst->sa_data);
control = PPP_CONTROL(dst->sa_data);
protocol = PPP_PROTOCOL(dst->sa_data);
mode = NPMODE_PASS;
break;
default:
printf("%s: af%d not supported\n", ifp->if_xname, dst->sa_family);
error = EAFNOSUPPORT;
goto bad;
}
/*
* Drop this packet, or return an error, if necessary.
*/
if (mode == NPMODE_ERROR) {
error = ENETDOWN;
goto bad;
}
if (mode == NPMODE_DROP) {
error = 0;
goto bad;
}
/*
* Add PPP header.
*/
M_PREPEND(m0, PPP_HDRLEN, M_DONTWAIT);
if (m0 == NULL) {
error = ENOBUFS;
goto bad;
}
cp = mtod(m0, u_char *);
*cp++ = address;
*cp++ = control;
*cp++ = protocol >> 8;
*cp++ = protocol & 0xff;
len = m_length(m0);
if (sc->sc_flags & SC_LOG_OUTPKT) {
printf("%s output: ", ifp->if_xname);
pppdumpm(m0);
}
if ((protocol & 0x8000) == 0) {
#ifdef PPP_FILTER
/*
* Apply the pass and active filters to the packet,
* but only if it is a data packet.
*/
if (sc->sc_pass_filt_out.bf_insns != 0
&& bpf_filter(sc->sc_pass_filt_out.bf_insns, (u_char *) m0,
len, 0) == 0) {
error = 0; /* drop this packet */
goto bad;
}