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if_pppx.c
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if_pppx.c
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/* $OpenBSD: if_pppx.c,v 1.112 2021/12/30 00:49:41 mvs Exp $ */
/*
* Copyright (c) 2010 Claudio Jeker <claudio@openbsd.org>
* Copyright (c) 2010 David Gwynne <dlg@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, 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.
*/
/*-
* Copyright (c) 2009 Internet Initiative Japan Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/queue.h>
#include <sys/pool.h>
#include <sys/mbuf.h>
#include <sys/errno.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/vnode.h>
#include <sys/poll.h>
#include <sys/selinfo.h>
#include <net/if.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <net/if_dl.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#ifdef INET6
#include <netinet6/in6_var.h>
#include <netinet/ip6.h>
#include <netinet6/nd6.h>
#endif /* INET6 */
#include "bpfilter.h"
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
#include "pf.h"
#if NPF > 0
#include <net/pfvar.h>
#endif
#include <net/ppp_defs.h>
#include <net/ppp-comp.h>
#include <crypto/arc4.h>
#ifdef PIPEX
#include <net/radix.h>
#include <net/pipex.h>
#include <net/pipex_local.h>
#else
#error PIPEX option not enabled
#endif
#ifdef PPPX_DEBUG
#define PPPX_D_INIT (1<<0)
int pppxdebug = 0;
#define DPRINTF(_m, _p...) do { \
if (ISSET(pppxdebug, (_m))) \
printf(_p); \
} while (0)
#else
#define DPRINTF(_m, _p...) /* _m, _p */
#endif
struct pppx_if;
/*
* Locks used to protect struct members and global data
* I immutable after creation
* K kernel lock
* N net lock
*/
struct pppx_dev {
LIST_ENTRY(pppx_dev) pxd_entry; /* [K] */
int pxd_unit; /* [I] */
/* kq shizz */
struct selinfo pxd_rsel;
struct mutex pxd_rsel_mtx;
struct selinfo pxd_wsel;
struct mutex pxd_wsel_mtx;
/* queue of packets for userland to service - protected by splnet */
struct mbuf_queue pxd_svcq;
int pxd_waiting; /* [N] */
LIST_HEAD(,pppx_if) pxd_pxis; /* [N] */
};
LIST_HEAD(, pppx_dev) pppx_devs =
LIST_HEAD_INITIALIZER(pppx_devs); /* [K] */
struct pool pppx_if_pl;
struct pppx_dev *pppx_dev_lookup(dev_t);
struct pppx_dev *pppx_dev2pxd(dev_t);
struct pppx_if_key {
int pxik_session_id; /* [I] */
int pxik_protocol; /* [I] */
};
struct pppx_if {
struct pppx_if_key pxi_key; /* [I] must be first
in the struct */
RBT_ENTRY(pppx_if) pxi_entry; /* [N] */
LIST_ENTRY(pppx_if) pxi_list; /* [N] */
int pxi_ready; /* [N] */
int pxi_unit; /* [I] */
struct ifnet pxi_if;
struct pppx_dev *pxi_dev; /* [I] */
struct pipex_session *pxi_session; /* [I] */
};
static inline int
pppx_if_cmp(const struct pppx_if *a, const struct pppx_if *b)
{
return memcmp(&a->pxi_key, &b->pxi_key, sizeof(a->pxi_key));
}
RBT_HEAD(pppx_ifs, pppx_if) pppx_ifs = RBT_INITIALIZER(&pppx_ifs); /* [N] */
RBT_PROTOTYPE(pppx_ifs, pppx_if, pxi_entry, pppx_if_cmp);
int pppx_if_next_unit(void);
struct pppx_if *pppx_if_find(struct pppx_dev *, int, int);
int pppx_add_session(struct pppx_dev *,
struct pipex_session_req *);
int pppx_del_session(struct pppx_dev *,
struct pipex_session_close_req *);
int pppx_set_session_descr(struct pppx_dev *,
struct pipex_session_descr_req *);
void pppx_if_destroy(struct pppx_dev *, struct pppx_if *);
void pppx_if_qstart(struct ifqueue *);
int pppx_if_output(struct ifnet *, struct mbuf *,
struct sockaddr *, struct rtentry *);
int pppx_if_ioctl(struct ifnet *, u_long, caddr_t);
void pppxattach(int);
void filt_pppx_rdetach(struct knote *);
int filt_pppx_read(struct knote *, long);
const struct filterops pppx_rd_filtops = {
.f_flags = FILTEROP_ISFD,
.f_attach = NULL,
.f_detach = filt_pppx_rdetach,
.f_event = filt_pppx_read,
};
void filt_pppx_wdetach(struct knote *);
int filt_pppx_write(struct knote *, long);
const struct filterops pppx_wr_filtops = {
.f_flags = FILTEROP_ISFD,
.f_attach = NULL,
.f_detach = filt_pppx_wdetach,
.f_event = filt_pppx_write,
};
struct pppx_dev *
pppx_dev_lookup(dev_t dev)
{
struct pppx_dev *pxd;
int unit = minor(dev);
LIST_FOREACH(pxd, &pppx_devs, pxd_entry) {
if (pxd->pxd_unit == unit)
return (pxd);
}
return (NULL);
}
struct pppx_dev *
pppx_dev2pxd(dev_t dev)
{
struct pppx_dev *pxd;
pxd = pppx_dev_lookup(dev);
return (pxd);
}
void
pppxattach(int n)
{
pool_init(&pppx_if_pl, sizeof(struct pppx_if), 0, IPL_NONE,
PR_WAITOK, "pppxif", NULL);
pipex_init();
}
int
pppxopen(dev_t dev, int flags, int mode, struct proc *p)
{
struct pppx_dev *pxd;
pxd = malloc(sizeof(*pxd), M_DEVBUF, M_WAITOK | M_ZERO);
if (pppx_dev_lookup(dev) != NULL) {
free(pxd, M_DEVBUF, sizeof(*pxd));
return (EBUSY);
}
pxd->pxd_unit = minor(dev);
mtx_init(&pxd->pxd_rsel_mtx, IPL_NET);
mtx_init(&pxd->pxd_wsel_mtx, IPL_NET);
LIST_INIT(&pxd->pxd_pxis);
mq_init(&pxd->pxd_svcq, 128, IPL_NET);
LIST_INSERT_HEAD(&pppx_devs, pxd, pxd_entry);
return 0;
}
int
pppxread(dev_t dev, struct uio *uio, int ioflag)
{
struct pppx_dev *pxd = pppx_dev2pxd(dev);
struct mbuf *m, *m0;
int error = 0;
size_t len;
if (!pxd)
return (ENXIO);
while ((m0 = mq_dequeue(&pxd->pxd_svcq)) == NULL) {
if (ISSET(ioflag, IO_NDELAY))
return (EWOULDBLOCK);
NET_LOCK();
pxd->pxd_waiting = 1;
error = rwsleep_nsec(pxd, &netlock,
(PZERO + 1)|PCATCH, "pppxread", INFSLP);
NET_UNLOCK();
if (error != 0) {
return (error);
}
}
while (m0 != NULL && uio->uio_resid > 0 && error == 0) {
len = ulmin(uio->uio_resid, m0->m_len);
if (len != 0)
error = uiomove(mtod(m0, caddr_t), len, uio);
m = m_free(m0);
m0 = m;
}
m_freem(m0);
return (error);
}
int
pppxwrite(dev_t dev, struct uio *uio, int ioflag)
{
struct pppx_dev *pxd = pppx_dev2pxd(dev);
struct pppx_hdr *th;
struct pppx_if *pxi;
uint32_t proto;
struct mbuf *top, **mp, *m;
int tlen;
int error = 0;
size_t mlen;
if (uio->uio_resid < sizeof(*th) + sizeof(uint32_t) ||
uio->uio_resid > MCLBYTES)
return (EMSGSIZE);
tlen = uio->uio_resid;
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL)
return (ENOBUFS);
mlen = MHLEN;
if (uio->uio_resid > MHLEN) {
MCLGET(m, M_DONTWAIT);
if (!(m->m_flags & M_EXT)) {
m_free(m);
return (ENOBUFS);
}
mlen = MCLBYTES;
}
top = NULL;
mp = ⊤
while (error == 0 && uio->uio_resid > 0) {
m->m_len = ulmin(mlen, uio->uio_resid);
error = uiomove(mtod (m, caddr_t), m->m_len, uio);
*mp = m;
mp = &m->m_next;
if (error == 0 && uio->uio_resid > 0) {
MGET(m, M_DONTWAIT, MT_DATA);
if (m == NULL) {
error = ENOBUFS;
break;
}
mlen = MLEN;
if (uio->uio_resid >= MINCLSIZE) {
MCLGET(m, M_DONTWAIT);
if (!(m->m_flags & M_EXT)) {
error = ENOBUFS;
m_free(m);
break;
}
mlen = MCLBYTES;
}
}
}
if (error) {
m_freem(top);
return (error);
}
top->m_pkthdr.len = tlen;
/* Find the interface */
th = mtod(top, struct pppx_hdr *);
m_adj(top, sizeof(struct pppx_hdr));
NET_LOCK();
pxi = pppx_if_find(pxd, th->pppx_id, th->pppx_proto);
if (pxi == NULL) {
NET_UNLOCK();
m_freem(top);
return (EINVAL);
}
top->m_pkthdr.ph_ifidx = pxi->pxi_if.if_index;
#if NBPFILTER > 0
if (pxi->pxi_if.if_bpf)
bpf_mtap(pxi->pxi_if.if_bpf, top, BPF_DIRECTION_IN);
#endif
/* strip the tunnel header */
proto = ntohl(*(uint32_t *)(th + 1));
m_adj(top, sizeof(uint32_t));
switch (proto) {
case AF_INET:
ipv4_input(&pxi->pxi_if, top);
break;
#ifdef INET6
case AF_INET6:
ipv6_input(&pxi->pxi_if, top);
break;
#endif
default:
m_freem(top);
error = EAFNOSUPPORT;
break;
}
NET_UNLOCK();
return (error);
}
int
pppxioctl(dev_t dev, u_long cmd, caddr_t addr, int flags, struct proc *p)
{
struct pppx_dev *pxd = pppx_dev2pxd(dev);
int error = 0;
NET_LOCK();
switch (cmd) {
case PIPEXASESSION:
error = pppx_add_session(pxd,
(struct pipex_session_req *)addr);
break;
case PIPEXDSESSION:
error = pppx_del_session(pxd,
(struct pipex_session_close_req *)addr);
break;
case PIPEXSIFDESCR:
error = pppx_set_session_descr(pxd,
(struct pipex_session_descr_req *)addr);
break;
case FIONBIO:
break;
case FIONREAD:
*(int *)addr = mq_hdatalen(&pxd->pxd_svcq);
break;
default:
error = pipex_ioctl(pxd, cmd, addr);
break;
}
NET_UNLOCK();
return (error);
}
int
pppxpoll(dev_t dev, int events, struct proc *p)
{
struct pppx_dev *pxd = pppx_dev2pxd(dev);
int revents = 0;
if (events & (POLLIN | POLLRDNORM)) {
if (!mq_empty(&pxd->pxd_svcq))
revents |= events & (POLLIN | POLLRDNORM);
}
if (events & (POLLOUT | POLLWRNORM))
revents |= events & (POLLOUT | POLLWRNORM);
if (revents == 0) {
if (events & (POLLIN | POLLRDNORM))
selrecord(p, &pxd->pxd_rsel);
}
return (revents);
}
int
pppxkqfilter(dev_t dev, struct knote *kn)
{
struct pppx_dev *pxd = pppx_dev2pxd(dev);
struct mutex *mtx;
struct klist *klist;
switch (kn->kn_filter) {
case EVFILT_READ:
mtx = &pxd->pxd_rsel_mtx;
klist = &pxd->pxd_rsel.si_note;
kn->kn_fop = &pppx_rd_filtops;
break;
case EVFILT_WRITE:
mtx = &pxd->pxd_wsel_mtx;
klist = &pxd->pxd_wsel.si_note;
kn->kn_fop = &pppx_wr_filtops;
break;
default:
return (EINVAL);
}
kn->kn_hook = (caddr_t)pxd;
mtx_enter(mtx);
klist_insert_locked(klist, kn);
mtx_leave(mtx);
return (0);
}
void
filt_pppx_rdetach(struct knote *kn)
{
struct pppx_dev *pxd = (struct pppx_dev *)kn->kn_hook;
struct klist *klist = &pxd->pxd_rsel.si_note;
mtx_enter(&pxd->pxd_rsel_mtx);
klist_remove_locked(klist, kn);
mtx_leave(&pxd->pxd_rsel_mtx);
}
int
filt_pppx_read(struct knote *kn, long hint)
{
struct pppx_dev *pxd = (struct pppx_dev *)kn->kn_hook;
kn->kn_data = mq_hdatalen(&pxd->pxd_svcq);
return (kn->kn_data > 0);
}
void
filt_pppx_wdetach(struct knote *kn)
{
struct pppx_dev *pxd = (struct pppx_dev *)kn->kn_hook;
struct klist *klist = &pxd->pxd_wsel.si_note;
mtx_enter(&pxd->pxd_wsel_mtx);
klist_remove_locked(klist, kn);
mtx_leave(&pxd->pxd_wsel_mtx);
}
int
filt_pppx_write(struct knote *kn, long hint)
{
/* We're always ready to accept a write. */
return (1);
}
int
pppxclose(dev_t dev, int flags, int mode, struct proc *p)
{
struct pppx_dev *pxd;
struct pppx_if *pxi;
pxd = pppx_dev_lookup(dev);
/* XXX */
NET_LOCK();
while ((pxi = LIST_FIRST(&pxd->pxd_pxis)))
pppx_if_destroy(pxd, pxi);
NET_UNLOCK();
LIST_REMOVE(pxd, pxd_entry);
mq_purge(&pxd->pxd_svcq);
free(pxd, M_DEVBUF, sizeof(*pxd));
return (0);
}
int
pppx_if_next_unit(void)
{
struct pppx_if *pxi;
int unit = 0;
/* this is safe without splnet since we're not modifying it */
do {
int found = 0;
RBT_FOREACH(pxi, pppx_ifs, &pppx_ifs) {
if (pxi->pxi_unit == unit) {
found = 1;
break;
}
}
if (found == 0)
break;
unit++;
} while (unit > 0);
return (unit);
}
struct pppx_if *
pppx_if_find(struct pppx_dev *pxd, int session_id, int protocol)
{
struct pppx_if_key key;
struct pppx_if *pxi;
memset(&key, 0, sizeof(key));
key.pxik_session_id = session_id;
key.pxik_protocol = protocol;
pxi = RBT_FIND(pppx_ifs, &pppx_ifs, (struct pppx_if *)&key);
if (pxi && pxi->pxi_ready == 0)
pxi = NULL;
return pxi;
}
int
pppx_add_session(struct pppx_dev *pxd, struct pipex_session_req *req)
{
struct pppx_if *pxi;
struct pipex_session *session;
struct ifnet *ifp;
int unit, error = 0;
struct in_ifaddr *ia;
struct sockaddr_in ifaddr;
/*
* XXX: As long as `session' is allocated as part of a `pxi'
* it isn't possible to free it separately. So disallow
* the timeout feature until this is fixed.
*/
if (req->pr_timeout_sec != 0)
return (EINVAL);
error = pipex_init_session(&session, req);
if (error)
return (error);
pxi = pool_get(&pppx_if_pl, PR_WAITOK | PR_ZERO);
ifp = &pxi->pxi_if;
pxi->pxi_session = session;
/* try to set the interface up */
unit = pppx_if_next_unit();
if (unit < 0) {
error = ENOMEM;
goto out;
}
pxi->pxi_unit = unit;
pxi->pxi_key.pxik_session_id = req->pr_session_id;
pxi->pxi_key.pxik_protocol = req->pr_protocol;
pxi->pxi_dev = pxd;
if (RBT_INSERT(pppx_ifs, &pppx_ifs, pxi) != NULL) {
error = EADDRINUSE;
goto out;
}
LIST_INSERT_HEAD(&pxd->pxd_pxis, pxi, pxi_list);
snprintf(ifp->if_xname, sizeof(ifp->if_xname), "%s%d", "pppx", unit);
ifp->if_mtu = req->pr_peer_mru; /* XXX */
ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST | IFF_UP;
ifp->if_xflags = IFXF_CLONED | IFXF_MPSAFE;
ifp->if_qstart = pppx_if_qstart;
ifp->if_output = pppx_if_output;
ifp->if_ioctl = pppx_if_ioctl;
ifp->if_rtrequest = p2p_rtrequest;
ifp->if_type = IFT_PPP;
ifp->if_softc = pxi;
/* ifp->if_rdomain = req->pr_rdomain; */
if_counters_alloc(ifp);
/* XXXSMP: be sure pppx_if_qstart() called with NET_LOCK held */
ifq_set_maxlen(&ifp->if_snd, 1);
/* XXXSMP breaks atomicity */
NET_UNLOCK();
if_attach(ifp);
NET_LOCK();
if_addgroup(ifp, "pppx");
if_alloc_sadl(ifp);
#if NBPFILTER > 0
bpfattach(&ifp->if_bpf, ifp, DLT_LOOP, sizeof(u_int32_t));
#endif
/* XXX ipv6 support? how does the caller indicate it wants ipv6
* instead of ipv4?
*/
memset(&ifaddr, 0, sizeof(ifaddr));
ifaddr.sin_family = AF_INET;
ifaddr.sin_len = sizeof(ifaddr);
ifaddr.sin_addr = req->pr_ip_srcaddr;
ia = malloc(sizeof (*ia), M_IFADDR, M_WAITOK | M_ZERO);
ia->ia_addr.sin_family = AF_INET;
ia->ia_addr.sin_len = sizeof(struct sockaddr_in);
ia->ia_addr.sin_addr = req->pr_ip_srcaddr;
ia->ia_dstaddr.sin_family = AF_INET;
ia->ia_dstaddr.sin_len = sizeof(struct sockaddr_in);
ia->ia_dstaddr.sin_addr = req->pr_ip_address;
ia->ia_sockmask.sin_family = AF_INET;
ia->ia_sockmask.sin_len = sizeof(struct sockaddr_in);
ia->ia_sockmask.sin_addr = req->pr_ip_netmask;
ia->ia_ifa.ifa_addr = sintosa(&ia->ia_addr);
ia->ia_ifa.ifa_dstaddr = sintosa(&ia->ia_dstaddr);
ia->ia_ifa.ifa_netmask = sintosa(&ia->ia_sockmask);
ia->ia_ifa.ifa_ifp = ifp;
ia->ia_netmask = ia->ia_sockmask.sin_addr.s_addr;
error = in_ifinit(ifp, ia, &ifaddr, 1);
if (error) {
printf("pppx: unable to set addresses for %s, error=%d\n",
ifp->if_xname, error);
} else {
if_addrhooks_run(ifp);
}
error = pipex_link_session(session, ifp, pxd);
if (error)
goto detach;
SET(ifp->if_flags, IFF_RUNNING);
pxi->pxi_ready = 1;
return (error);
detach:
/* XXXSMP breaks atomicity */
NET_UNLOCK();
if_detach(ifp);
NET_LOCK();
if (RBT_REMOVE(pppx_ifs, &pppx_ifs, pxi) == NULL)
panic("%s: inconsistent RB tree", __func__);
LIST_REMOVE(pxi, pxi_list);
out:
pool_put(&pppx_if_pl, pxi);
pipex_rele_session(session);
return (error);
}
int
pppx_del_session(struct pppx_dev *pxd, struct pipex_session_close_req *req)
{
struct pppx_if *pxi;
pxi = pppx_if_find(pxd, req->pcr_session_id, req->pcr_protocol);
if (pxi == NULL)
return (EINVAL);
pipex_export_session_stats(pxi->pxi_session, &req->pcr_stat);
pppx_if_destroy(pxd, pxi);
return (0);
}
int
pppx_set_session_descr(struct pppx_dev *pxd,
struct pipex_session_descr_req *req)
{
struct pppx_if *pxi;
pxi = pppx_if_find(pxd, req->pdr_session_id, req->pdr_protocol);
if (pxi == NULL)
return (EINVAL);
(void)memset(pxi->pxi_if.if_description, 0, IFDESCRSIZE);
strlcpy(pxi->pxi_if.if_description, req->pdr_descr, IFDESCRSIZE);
return (0);
}
void
pppx_if_destroy(struct pppx_dev *pxd, struct pppx_if *pxi)
{
struct ifnet *ifp;
struct pipex_session *session;
NET_ASSERT_LOCKED();
session = pxi->pxi_session;
ifp = &pxi->pxi_if;
pxi->pxi_ready = 0;
CLR(ifp->if_flags, IFF_RUNNING);
pipex_unlink_session(session);
/* XXXSMP breaks atomicity */
NET_UNLOCK();
if_detach(ifp);
NET_LOCK();
pipex_rele_session(session);
if (RBT_REMOVE(pppx_ifs, &pppx_ifs, pxi) == NULL)
panic("%s: inconsistent RB tree", __func__);
LIST_REMOVE(pxi, pxi_list);
pool_put(&pppx_if_pl, pxi);
}
void
pppx_if_qstart(struct ifqueue *ifq)
{
struct ifnet *ifp = ifq->ifq_if;
struct pppx_if *pxi = (struct pppx_if *)ifp->if_softc;
struct mbuf *m;
int proto;
NET_ASSERT_LOCKED();
while ((m = ifq_dequeue(ifq)) != NULL) {
proto = *mtod(m, int *);
m_adj(m, sizeof(proto));
pipex_ppp_output(m, pxi->pxi_session, proto);
}
}
int
pppx_if_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
struct rtentry *rt)
{
struct pppx_if *pxi = (struct pppx_if *)ifp->if_softc;
struct pppx_hdr *th;
int error = 0;
int proto;
NET_ASSERT_LOCKED();
if (!ISSET(ifp->if_flags, IFF_RUNNING)) {
m_freem(m);
error = ENETDOWN;
goto out;
}
#if NBPFILTER > 0
if (ifp->if_bpf)
bpf_mtap_af(ifp->if_bpf, dst->sa_family, m, BPF_DIRECTION_OUT);
#endif
if (pipex_enable) {
switch (dst->sa_family) {
#ifdef INET6
case AF_INET6:
proto = PPP_IPV6;
break;
#endif
case AF_INET:
proto = PPP_IP;
break;
default:
m_freem(m);
error = EPFNOSUPPORT;
goto out;
}
} else
proto = htonl(dst->sa_family);
M_PREPEND(m, sizeof(int), M_DONTWAIT);
if (m == NULL) {
error = ENOBUFS;
goto out;
}
*mtod(m, int *) = proto;
if (pipex_enable)
error = if_enqueue(ifp, m);
else {
M_PREPEND(m, sizeof(struct pppx_hdr), M_DONTWAIT);
if (m == NULL) {
error = ENOBUFS;
goto out;
}
th = mtod(m, struct pppx_hdr *);
th->pppx_proto = 0; /* not used */
th->pppx_id = pxi->pxi_session->ppp_id;
error = mq_enqueue(&pxi->pxi_dev->pxd_svcq, m);
if (error == 0) {
if (pxi->pxi_dev->pxd_waiting) {
wakeup((caddr_t)pxi->pxi_dev);
pxi->pxi_dev->pxd_waiting = 0;
}
selwakeup(&pxi->pxi_dev->pxd_rsel);
}
}
out:
if (error)
counters_inc(ifp->if_counters, ifc_oerrors);
return (error);
}
int
pppx_if_ioctl(struct ifnet *ifp, u_long cmd, caddr_t addr)
{
struct pppx_if *pxi = (struct pppx_if *)ifp->if_softc;
struct ifreq *ifr = (struct ifreq *)addr;
int error = 0;
switch (cmd) {
case SIOCSIFADDR:
break;
case SIOCSIFFLAGS:
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
break;
case SIOCSIFMTU:
if (ifr->ifr_mtu < 512 ||
ifr->ifr_mtu > pxi->pxi_session->peer_mru)
error = EINVAL;
else
ifp->if_mtu = ifr->ifr_mtu;
break;
default:
error = ENOTTY;
break;
}
return (error);
}
RBT_GENERATE(pppx_ifs, pppx_if, pxi_entry, pppx_if_cmp);
/*
* Locks used to protect struct members and global data
* I immutable after creation
* K kernel lock
* N net lock
*/
struct pppac_softc {
struct ifnet sc_if;
dev_t sc_dev; /* [I] */
int sc_ready; /* [K] */
LIST_ENTRY(pppac_softc)
sc_entry; /* [K] */
struct mutex sc_rsel_mtx;
struct selinfo sc_rsel;
struct mutex sc_wsel_mtx;
struct selinfo sc_wsel;
struct pipex_session
*sc_multicast_session;
struct mbuf_queue
sc_mq;
};
LIST_HEAD(pppac_list, pppac_softc); /* [K] */
static void filt_pppac_rdetach(struct knote *);
static int filt_pppac_read(struct knote *, long);
static const struct filterops pppac_rd_filtops = {
.f_flags = FILTEROP_ISFD,
.f_attach = NULL,
.f_detach = filt_pppac_rdetach,
.f_event = filt_pppac_read
};
static void filt_pppac_wdetach(struct knote *);
static int filt_pppac_write(struct knote *, long);
static const struct filterops pppac_wr_filtops = {
.f_flags = FILTEROP_ISFD,
.f_attach = NULL,
.f_detach = filt_pppac_wdetach,
.f_event = filt_pppac_write
};
static struct pppac_list pppac_devs = LIST_HEAD_INITIALIZER(pppac_devs);
static int pppac_ioctl(struct ifnet *, u_long, caddr_t);
static int pppac_add_session(struct pppac_softc *,
struct pipex_session_req *);
static int pppac_del_session(struct pppac_softc *,
struct pipex_session_close_req *);
static int pppac_output(struct ifnet *, struct mbuf *, struct sockaddr *,
struct rtentry *);
static void pppac_qstart(struct ifqueue *);
static inline struct pppac_softc *
pppac_lookup(dev_t dev)
{
struct pppac_softc *sc;
LIST_FOREACH(sc, &pppac_devs, sc_entry) {
if (sc->sc_dev == dev) {
if (sc->sc_ready == 0)
break;
return (sc);
}
}
return (NULL);
}
void