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Restore Ethernet-within-IP Encapsulation support that was broken after

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r273087. Move all checks from gif_output() into gif_transmit(). Previously
they were checked always, because if_start always called gif_output.
Now gif_transmit() can be called directly from if_bridge() code and we need
do checks here.

PR:		196646
MFC after:	1 week
This commit is contained in:
ae 2015-01-10 08:28:50 +00:00
parent 990c8c285b
commit e280c01379
1 changed files with 18 additions and 24 deletions
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42
sys/net/if_gif.c
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@ -118,6 +118,7 @@ void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, int af);
void (*ng_gif_attach_p)(struct ifnet *ifp);
void (*ng_gif_detach_p)(struct ifnet *ifp);
static int gif_check_nesting(struct ifnet *, struct mbuf *);
static int gif_set_tunnel(struct ifnet *, struct sockaddr *,
struct sockaddr *);
static void gif_delete_tunnel(struct ifnet *);
@ -351,18 +352,32 @@ gif_transmit(struct ifnet *ifp, struct mbuf *m)
uint8_t proto, ecn;
int error;
#ifdef MAC
error = mac_ifnet_check_transmit(ifp, m);
if (error) {
m_freem(m);
goto err;
}
#endif
error = ENETDOWN;
sc = ifp->if_softc;
if (sc->gif_family == 0) {
if ((ifp->if_flags & IFF_MONITOR) != 0 ||
(ifp->if_flags & IFF_UP) == 0 ||
sc->gif_family == 0 ||
(error = gif_check_nesting(ifp, m)) != 0) {
m_freem(m);
goto err;
}
/* Now pull back the af that we stashed in the csum_data. */
af = m->m_pkthdr.csum_data;
if (ifp->if_bridge)
af = AF_LINK;
else
af = m->m_pkthdr.csum_data;
m->m_flags &= ~(M_BCAST|M_MCAST);
M_SETFIB(m, sc->gif_fibnum);
BPF_MTAP2(ifp, &af, sizeof(af), m);
if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
M_SETFIB(m, sc->gif_fibnum);
/* inner AF-specific encapsulation */
ecn = 0;
switch (af) {
@ -488,28 +503,11 @@ gif_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
struct route *ro)
{
uint32_t af;
int error = 0;
#ifdef MAC
error = mac_ifnet_check_transmit(ifp, m);
if (error)
goto err;
#endif
if ((ifp->if_flags & IFF_MONITOR) != 0 ||
(ifp->if_flags & IFF_UP) == 0) {
error = ENETDOWN;
goto err;
}
error = gif_check_nesting(ifp, m);
if (error != 0)
goto err;
m->m_flags &= ~(M_BCAST|M_MCAST);
if (dst->sa_family == AF_UNSPEC)
bcopy(dst->sa_data, &af, sizeof(af));
else
af = dst->sa_family;
if (ifp->if_bridge)
af = AF_LINK;
/*
* Now save the af in the inbound pkt csum data, this is a cheat since
* we are using the inbound csum_data field to carry the af over to
@ -517,10 +515,6 @@ gif_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
*/
m->m_pkthdr.csum_data = af;
return (ifp->if_transmit(ifp, m));
err:
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
m_freem(m);
return (error);
}
void