diff options
author | sam <sam@FreeBSD.org> | 2005-07-22 20:48:11 +0000 |
---|---|---|
committer | sam <sam@FreeBSD.org> | 2005-07-22 20:48:11 +0000 |
commit | bd0efadacda73f031838bab860b64bc4f02b89c4 (patch) | |
tree | 065203ba87ec2dfe6b8e16639a092201e1480799 /sys | |
parent | c45e23d0396e341c2ea30fff66b565186107df40 (diff) | |
download | FreeBSD-src-bd0efadacda73f031838bab860b64bc4f02b89c4.zip FreeBSD-src-bd0efadacda73f031838bab860b64bc4f02b89c4.tar.gz |
split 802.11 frame xmit setup code into ieee80211_send_setup
MFC after: 3 days
Diffstat (limited to 'sys')
-rw-r--r-- | sys/net80211/ieee80211_output.c | 108 |
1 files changed, 72 insertions, 36 deletions
diff --git a/sys/net80211/ieee80211_output.c b/sys/net80211/ieee80211_output.c index d48d8da..d92603d 100644 --- a/sys/net80211/ieee80211_output.c +++ b/sys/net80211/ieee80211_output.c @@ -78,6 +78,62 @@ doprint(struct ieee80211com *ic, int subtype) #endif /* + * Set the direction field and address fields of an outgoing + * non-QoS frame. Note this should be called early on in + * constructing a frame as it sets i_fc[1]; other bits can + * then be or'd in. + */ +static void +ieee80211_send_setup(struct ieee80211com *ic, + struct ieee80211_node *ni, + struct ieee80211_frame *wh, + int type, + const u_int8_t sa[IEEE80211_ADDR_LEN], + const u_int8_t da[IEEE80211_ADDR_LEN], + const u_int8_t bssid[IEEE80211_ADDR_LEN]) +{ +#define WH4(wh) ((struct ieee80211_frame_addr4 *)wh) + + wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type; + if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) { + switch (ic->ic_opmode) { + case IEEE80211_M_STA: + wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; + IEEE80211_ADDR_COPY(wh->i_addr1, bssid); + IEEE80211_ADDR_COPY(wh->i_addr2, sa); + IEEE80211_ADDR_COPY(wh->i_addr3, da); + break; + case IEEE80211_M_IBSS: + case IEEE80211_M_AHDEMO: + wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; + IEEE80211_ADDR_COPY(wh->i_addr1, da); + IEEE80211_ADDR_COPY(wh->i_addr2, sa); + IEEE80211_ADDR_COPY(wh->i_addr3, bssid); + break; + case IEEE80211_M_HOSTAP: + wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; + IEEE80211_ADDR_COPY(wh->i_addr1, da); + IEEE80211_ADDR_COPY(wh->i_addr2, bssid); + IEEE80211_ADDR_COPY(wh->i_addr3, sa); + break; + case IEEE80211_M_MONITOR: /* NB: to quiet compiler */ + break; + } + } else { + wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; + IEEE80211_ADDR_COPY(wh->i_addr1, da); + IEEE80211_ADDR_COPY(wh->i_addr2, sa); + IEEE80211_ADDR_COPY(wh->i_addr3, bssid); + } + *(u_int16_t *)&wh->i_dur[0] = 0; + /* NB: use non-QoS tid */ + *(u_int16_t *)&wh->i_seq[0] = + htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT); + ni->ni_txseqs[0]++; +#undef WH4 +} + +/* * Send a management frame to the specified node. The node pointer * must have a reference as the pointer will be passed to the driver * and potentially held for a long time. If the frame is successfully @@ -112,30 +168,9 @@ ieee80211_mgmt_output(struct ieee80211com *ic, struct ieee80211_node *ni, m->m_pkthdr.rcvif = (void *)ni; wh = mtod(m, struct ieee80211_frame *); - wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | type; - wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; - *(u_int16_t *)wh->i_dur = 0; - *(u_int16_t *)wh->i_seq = - htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT); - ni->ni_txseqs[0]++; - /* - * Hack. When sending PROBE_REQ frames while scanning we - * explicitly force a broadcast rather than (as before) clobber - * ni_macaddr and ni_bssid. This is stopgap, we need a way - * to communicate this directly rather than do something - * implicit based on surrounding state. - */ - if (type == IEEE80211_FC0_SUBTYPE_PROBE_REQ && - (ic->ic_flags & IEEE80211_F_SCAN)) { - IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); - IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr); - IEEE80211_ADDR_COPY(wh->i_addr3, ifp->if_broadcastaddr); - } else { - IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); - IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr); - IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); - } - + ieee80211_send_setup(ic, ni, wh, + IEEE80211_FC0_TYPE_MGT | type, + ic->ic_myaddr, ni->ni_macaddr, ni->ni_bssid); if ((m->m_flags & M_LINK0) != 0 && ni->ni_challenge != NULL) { m->m_flags &= ~M_LINK0; IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH, @@ -182,22 +217,23 @@ ieee80211_send_nulldata(struct ieee80211_node *ni) m->m_pkthdr.rcvif = (void *) ieee80211_ref_node(ni); wh = mtod(m, struct ieee80211_frame *); - wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA | - IEEE80211_FC0_SUBTYPE_NODATA; - *(u_int16_t *)wh->i_dur = 0; - *(u_int16_t *)wh->i_seq = - htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT); - ni->ni_txseqs[0]++; - - /* XXX WDS */ - wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; - IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); - IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); - IEEE80211_ADDR_COPY(wh->i_addr3, ic->ic_myaddr); + ieee80211_send_setup(ic, ni, wh, + IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA, + ic->ic_myaddr, ni->ni_macaddr, ni->ni_bssid); + /* NB: power management bit is never sent by an AP */ + if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && + ic->ic_opmode != IEEE80211_M_HOSTAP) + wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT; m->m_len = m->m_pkthdr.len = sizeof(struct ieee80211_frame); IEEE80211_NODE_STAT(ni, tx_data); + IEEE80211_DPRINTF(ic, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, + "[%s] send null data frame on channel %u, pwr mgt %s\n", + ether_sprintf(ni->ni_macaddr), + ieee80211_chan2ieee(ic, ni->ni_chan), + wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis"); + IF_ENQUEUE(&ic->ic_mgtq, m); /* cheat */ if_start(ifp); |