diff options
Diffstat (limited to 'sys/net80211/ieee80211_output.c')
| -rw-r--r-- | sys/net80211/ieee80211_output.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/sys/net80211/ieee80211_output.c b/sys/net80211/ieee80211_output.c index e9ba167..2fff3ae 100644 --- a/sys/net80211/ieee80211_output.c +++ b/sys/net80211/ieee80211_output.c @@ -1495,18 +1495,28 @@ static int ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0, u_int hdrsize, u_int ciphdrsize, u_int mtu) { + struct ieee80211com *ic = vap->iv_ic; struct ieee80211_frame *wh, *whf; struct mbuf *m, *prev, *next; u_int totalhdrsize, fragno, fragsize, off, remainder, payload; + u_int hdrspace; KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?")); KASSERT(m0->m_pkthdr.len > mtu, ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu)); + /* + * Honor driver DATAPAD requirement. + */ + if (ic->ic_flags & IEEE80211_F_DATAPAD) + hdrspace = roundup(hdrsize, sizeof(uint32_t)); + else + hdrspace = hdrsize; + wh = mtod(m0, struct ieee80211_frame *); /* NB: mark the first frag; it will be propagated below */ wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG; - totalhdrsize = hdrsize + ciphdrsize; + totalhdrsize = hdrspace + ciphdrsize; fragno = 1; off = mtu - ciphdrsize; remainder = m0->m_pkthdr.len - off; @@ -1553,9 +1563,10 @@ ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0, payload = fragsize - totalhdrsize; /* NB: destination is known to be contiguous */ - m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrsize); - m->m_len = hdrsize + payload; - m->m_pkthdr.len = hdrsize + payload; + + m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrspace); + m->m_len = hdrspace + payload; + m->m_pkthdr.len = hdrspace + payload; m->m_flags |= M_FRAG; /* chain up the fragment */ |
