diff options
Diffstat (limited to 'sys/net/if_ovpn.c')
| -rw-r--r-- | sys/net/if_ovpn.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/net/if_ovpn.c b/sys/net/if_ovpn.c index fb9596069101..f6f640a65f61 100644 --- a/sys/net/if_ovpn.c +++ b/sys/net/if_ovpn.c @@ -255,6 +255,7 @@ static const char ovpnname[] = "ovpn"; static const char ovpngroupname[] = "openvpn"; static MALLOC_DEFINE(M_OVPN, ovpnname, "OpenVPN DCO Interface"); +#define MTAG_OVPN_LOOP 0x6f76706e /* ovpn */ SYSCTL_DECL(_net_link); static SYSCTL_NODE(_net_link, IFT_OTHER, openvpn, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, @@ -1854,6 +1855,14 @@ ovpn_transmit_to_peer(struct ifnet *ifp, struct mbuf *m, if (af != 0) BPF_MTAP2(ifp, &af, sizeof(af), m); + if (__predict_false(if_tunnel_check_nesting(ifp, m, MTAG_OVPN_LOOP, 3))) { + if (_ovpn_lock_trackerp != NULL) + OVPN_RUNLOCK(sc); + OVPN_COUNTER_ADD(sc, lost_data_pkts_out, 1); + m_freem(m); + return (ELOOP); + } + len = m->m_pkthdr.len; MPASS(len <= ifp->if_mtu); |