struct ieee80211_node *
ieee80211_alloc_node(struct ieee80211com *ic, const u_int8_t *macaddr)
{
struct ieee80211_node *ni = ieee80211_alloc_node_helper(ic);
if (ni != NULL)
ieee80211_setup_node(ic, ni, macaddr);
else
ic->ic_stats.is_rx_nodealloc++;
return ni;
}
struct ieee80211_node *
ieee80211_dup_bss(struct ieee80211com *ic, const u_int8_t *macaddr)
{
struct ieee80211_node *ni = ieee80211_alloc_node_helper(ic);
if (ni != NULL) {
ieee80211_setup_node(ic, ni, macaddr);
/*
* Inherit from ic_bss.
*/
IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid);
ni->ni_chan = ic->ic_bss->ni_chan;
} else
ic->ic_stats.is_rx_nodealloc++;
return ni;
}
/*
* Join an infrastructure network
*/
int
ieee80211_sta_join(struct ieee80211vap *vap, ieee80211_scan_entry_t scan_entry)
{
struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_node_table *nt = &ic->ic_sta;
struct ieee80211_node *ni = NULL;
const u_int8_t *macaddr = ieee80211_scan_entry_macaddr(scan_entry);
int error = 0;
ASSERT(vap->iv_opmode == IEEE80211_M_STA);
ni = ieee80211_find_node(nt, macaddr);
if (ni) {
/*
* reusing old node has a potential for several bugs . The old node may have some state info from previous association.
* get rid of the old bss node and create a new bss node.
*/
ieee80211_sta_leave(ni);
ieee80211_free_node(ni);
}
/*
* Create a BSS node.
*/
ni = ieee80211_alloc_node(nt, vap, macaddr);
if (ni == NULL)
return -ENOMEM;
/* set the maximum number frmaes to be queued when the vap is in fake sleep */
ieee80211_node_saveq_set_param(ni,IEEE80211_NODE_SAVEQ_DATA_Q_LEN,IEE80211_STA_MAX_NODE_SAVEQ_LEN);
/* To become a bss node, a node need an extra reference count, which alloc node already gives */
#ifdef IEEE80211_DEBUG_REFCNT
ieee80211_note(ni->ni_vap,"%s ,line %u: increase node %p <%s> refcnt to %d\n",
__func__, __LINE__, ni, ether_sprintf(ni->ni_macaddr),
ieee80211_node_refcnt(ni));
#endif
/* setup the bss node for association */
error = ieee80211_setup_node(ni, scan_entry);
if (error != 0) {
ieee80211_free_node(ni);
return error;
}
/* copy the beacon timestamp */
OS_MEMCPY(ni->ni_tstamp.data,
ieee80211_scan_entry_tsf(scan_entry),
sizeof(ni->ni_tstamp));
/*
* Join the BSS represented by this new node.
* This function will free up the old BSS node
* and use this one as the new BSS node.
*/
ieee80211_sta_join_bss(ni);
IEEE80211_ADD_NODE_TARGET(ni, ni->ni_vap, 0);
/* Save our home channel */
vap->iv_bsschan = ni->ni_chan;
vap->iv_cur_mode = ieee80211_chan2mode(ni->ni_chan);
/* Update the DotH falg */
ieee80211_update_spectrumrequirement(vap);
/*
* The OS will control our security keys.
* If clear, keys will be cleared.
* If static WEP, keys will be plumbed before JoinInfra.
* If WPA/WPA2, ciphers will be setup, but no keys will be plumbed until
* after they are negotiated.
* XXX We should ASSERT that all of the foregoing is true.
*/
return 0;
}