diff options
Diffstat (limited to 'sys/net')
| -rw-r--r-- | sys/net/if_ethersubr.c | 31 |
1 files changed, 26 insertions, 5 deletions
diff --git a/sys/net/if_ethersubr.c b/sys/net/if_ethersubr.c index 8e1357d2397..a70476a6aa7 100644 --- a/sys/net/if_ethersubr.c +++ b/sys/net/if_ethersubr.c @@ -1,4 +1,4 @@ -/* $OpenBSD: if_ethersubr.c,v 1.45 2001/05/28 19:51:06 dugsong Exp $ */ +/* $OpenBSD: if_ethersubr.c,v 1.46 2001/06/14 02:13:58 itojun Exp $ */ /* $NetBSD: if_ethersubr.c,v 1.19 1996/05/07 02:40:30 thorpej Exp $ */ /* @@ -575,17 +575,38 @@ ether_input(ifp, eh, m) m_freem(m); return; } - ifp->if_lastchange = time; - ifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh); if (eh->ether_dhost[0] & 1) { + if ((ifp->if_flags & IFF_SIMPLEX) == 0) { + struct ifaddr *ifa; + struct sockaddr_dl *sdl = NULL; + + for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; + ifa = ifa->ifa_list.tqe_next) + if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) && + sdl->sdl_family == AF_LINK) + break; + + /* + * If this is not a simplex interface, drop the packet + * if it came from us. + */ + if (sdl && bcmp(LLADDR(sdl), eh->ether_shost, + ETHER_ADDR_LEN) == 0) { + m_freem(m); + return; + } + } + if (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost, sizeof(etherbroadcastaddr)) == 0) m->m_flags |= M_BCAST; else m->m_flags |= M_MCAST; - } - if (m->m_flags & (M_BCAST|M_MCAST)) ifp->if_imcasts++; + } + + ifp->if_lastchange = time; + ifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh); etype = ntohs(eh->ether_type); |