/*
* Queue a packet. Start transmission if not active.
* Packet is placed in Information field of PPP frame.
* Called at splnet as the if->if_output handler.
* Called at splnet from pppwrite().
*/
static int
pppoutput_serialized(struct ifnet *ifp, struct ifaltq_subque *ifsq,
struct mbuf *m0, struct sockaddr *dst, struct rtentry *rtp)
{
struct ppp_softc *sc = &ppp_softc[ifp->if_dunit];
int protocol, address, control;
u_char *cp;
int error;
#ifdef INET
struct ip *ip;
#endif
struct ifqueue *ifq;
enum NPmode mode;
int len;
struct mbuf *m;
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 IPX
case AF_IPX:
/*
* This is pretty bogus.. We dont have an ipxcp module in pppd
* yet to configure the link parameters. Sigh. I guess a
* manual ifconfig would do.... -Peter
*/
address = PPP_ALLSTATIONS;
control = PPP_UI;
protocol = PPP_IPX;
mode = NPMODE_PASS;
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:
kprintf("%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. If no space in first mbuf, allocate another.
* (This assumes M_LEADINGSPACE is always 0 for a cluster mbuf.)
*/
if (M_LEADINGSPACE(m0) < PPP_HDRLEN) {
m0 = m_prepend(m0, PPP_HDRLEN, MB_DONTWAIT);
if (m0 == NULL) {
error = ENOBUFS;
goto bad;
}
m0->m_len = 0;
} else
m0->m_data -= PPP_HDRLEN;
cp = mtod(m0, u_char *);
*cp++ = address;
*cp++ = control;
*cp++ = protocol >> 8;
*cp++ = protocol & 0xff;
m0->m_len += PPP_HDRLEN;
len = 0;
for (m = m0; m != NULL; m = m->m_next)
len += m->m_len;
if (sc->sc_flags & SC_LOG_OUTPKT) {
kprintf("%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.
*/
*mtod(m0, u_char *) = 1; /* indicates outbound */
if (sc->sc_pass_filt.bf_insns != NULL
&& bpf_filter(sc->sc_pass_filt.bf_insns, (u_char *) m0,
len, 0) == 0) {
error = 0; /* drop this packet */
goto bad;
}
/*
* Update the time we sent the most recent packet.
*/
if (sc->sc_active_filt.bf_insns == NULL
|| bpf_filter(sc->sc_active_filt.bf_insns, (u_char *) m0, len, 0))
sc->sc_last_sent = time_uptime;
*mtod(m0, u_char *) = address;
#else
/*
* Update the time we sent the most recent data packet.
*/
sc->sc_last_sent = time_uptime;
#endif /* PPP_FILTER */
}
BPF_MTAP(ifp, m0);
/*
* Put the packet on the appropriate queue.
*/
crit_enter();
if (mode == NPMODE_QUEUE) {
/* XXX we should limit the number of packets on this queue */
*sc->sc_npqtail = m0;
m0->m_nextpkt = NULL;
sc->sc_npqtail = &m0->m_nextpkt;
} else {
/* fastq and if_snd are emptied at spl[soft]net now */
if ((m0->m_flags & M_HIGHPRI) && !ifq_is_enabled(&sc->sc_if.if_snd)) {
ifq = &sc->sc_fastq;
if (IF_QFULL(ifq) && dst->sa_family != AF_UNSPEC) {
IF_DROP(ifq);
m_freem(m0);
error = ENOBUFS;
} else {
IF_ENQUEUE(ifq, m0);
error = 0;
}
} else {
ASSERT_ALTQ_SQ_SERIALIZED_HW(ifsq);
error = ifsq_enqueue(ifsq, m0, &pktattr);
}
if (error) {
crit_exit();
IFNET_STAT_INC(&sc->sc_if, oerrors, 1);
sc->sc_stats.ppp_oerrors++;
return (error);
}
(*sc->sc_start)(sc);
}
getmicrotime(&ifp->if_lastchange);
IFNET_STAT_INC(ifp, opackets, 1);
IFNET_STAT_INC(ifp, obytes, len);
crit_exit();
return (0);
bad:
m_freem(m0);
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, struct sockaddr *dst,
struct rtentry *rtp)
{
struct ppp_softc *sc = ifp->if_softc;
int protocol, address, control;
u_char *cp;
int s, error;
struct ip *ip;
struct ifqueue *ifq;
enum NPmode mode;
int len;
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;
}
#ifdef DIAGNOSTIC
if (ifp->if_rdomain != rtable_l2(m0->m_pkthdr.ph_rtableid)) {
printf("%s: trying to send packet on wrong domain. "
"if %d vs. mbuf %d, AF %d\n", ifp->if_xname, ifp->if_rdomain,
rtable_l2(m0->m_pkthdr.ph_rtableid), dst->sa_family);
}
#endif
/*
* 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
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. If no space in first mbuf, allocate another.
* (This assumes M_LEADINGSPACE is always 0 for a cluster mbuf.)
*/
M_PREPEND(m0, PPP_HDRLEN, M_DONTWAIT);
if (m0 == 0) {
error = ENOBUFS;
goto bad;
}
cp = mtod(m0, u_char *);
*cp++ = address;
*cp++ = control;
*cp++ = protocol >> 8;
*cp++ = protocol & 0xff;
if ((m0->m_flags & M_PKTHDR) == 0)
panic("mbuf packet without packet header!");
len = m0->m_pkthdr.len;
if (sc->sc_flags & SC_LOG_OUTPKT) {
printf("%s output: ", ifp->if_xname);
pppdumpm(m0);
}
if ((protocol & 0x8000) == 0) {
#if NBPFILTER > 0
/*
* Apply the pass and active filters to the packet,
* but only if it is a data packet.
*/
*mtod(m0, u_char *) = 1; /* indicates outbound */
if (sc->sc_pass_filt.bf_insns != 0
&& bpf_filter(sc->sc_pass_filt.bf_insns, (u_char *) m0,
len, 0) == 0) {
error = 0; /* drop this packet */
goto bad;
}
/*
* Update the time we sent the most recent packet.
*/
if (sc->sc_active_filt.bf_insns == 0
|| bpf_filter(sc->sc_active_filt.bf_insns, (u_char *) m0, len, 0))
sc->sc_last_sent = time_second;
*mtod(m0, u_char *) = address;
#else
/*
* Update the time we sent the most recent packet.
*/
sc->sc_last_sent = time_second;
#endif
}
#if NBPFILTER > 0
/*
* See if bpf wants to look at the packet.
*/
if (sc->sc_bpf)
bpf_mtap(sc->sc_bpf, m0, BPF_DIRECTION_OUT);
#endif
/*
* Put the packet on the appropriate queue.
*/
s = splsoftnet();
if (mode == NPMODE_QUEUE) {
/* XXX we should limit the number of packets on this queue */
*sc->sc_npqtail = m0;
m0->m_nextpkt = NULL;
sc->sc_npqtail = &m0->m_nextpkt;
} else {
if (m0->m_flags & M_HIGHPRI) {
ifq = &sc->sc_fastq;
if (IF_QFULL(ifq) && dst->sa_family != AF_UNSPEC) {
IF_DROP(ifq);
m_freem(m0);
error = ENOBUFS;
}
else {
IF_ENQUEUE(ifq, m0);
error = 0;
}
} else
IFQ_ENQUEUE(&sc->sc_if.if_snd, m0, NULL, error);
if (error) {
splx(s);
sc->sc_if.if_oerrors++;
sc->sc_stats.ppp_oerrors++;
return (error);
}
(*sc->sc_start)(sc);
}
ifp->if_opackets++;
ifp->if_obytes += len;
splx(s);
return (0);
bad:
m_freem(m0);
return (error);
}
