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Allow injecting big packets via bpf(4) up to min(MTU, 16K-byte).

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MFC after:	1 week
This commit is contained in:
Jung-uk Kim 2008-07-14 22:41:48 +00:00
parent 1989184838
commit 968c88bc75
1 changed files with 9 additions and 3 deletions
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12
sys/net/bpf.c
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@ -443,13 +443,19 @@ bpf_movein(struct uio *uio, int linktype, struct ifnet *ifp, struct mbuf **mp,
if (len - hlen > ifp->if_mtu)
return (EMSGSIZE);
if ((unsigned)len > MCLBYTES)
if ((unsigned)len > MJUM16BYTES)
return (EIO);
if (len > MHLEN)
if (len <= MHLEN)
MGETHDR(m, M_WAIT, MT_DATA);
else if (len <= MCLBYTES)
m = m_getcl(M_WAIT, MT_DATA, M_PKTHDR);
else
MGETHDR(m, M_WAIT, MT_DATA);
m = m_getjcl(M_WAIT, MT_DATA, M_PKTHDR,
#if (MJUMPAGESIZE > MCLBYTES)
len <= MJUMPAGESIZE ? MJUMPAGESIZE :
#endif
(len <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES));
m->m_pkthdr.len = m->m_len = len;
m->m_pkthdr.rcvif = NULL;
*mp = m;