From FreeBSD. Handle ad hoc-mode nodes better.
Use FREE/MALLOC instead of free/malloc. Add back _ieee80211_find_node, the helper for ieee80211_find_node.
This commit is contained in:
dyoung
parent
26f67ccc94
commit
bd8379210b
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@ -1,4 +1,4 @@
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/* $NetBSD: ieee80211_node.c,v 1.10 2004/01/13 23:37:30 dyoung Exp $ */
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/* $NetBSD: ieee80211_node.c,v 1.11 2004/04/30 23:58:14 dyoung Exp $ */
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/*-
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* Copyright (c) 2001 Atsushi Onoe
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* Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting
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@ -33,9 +33,9 @@
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#include <sys/cdefs.h>
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#ifdef __FreeBSD__
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__FBSDID("$FreeBSD: src/sys/net80211/ieee80211_node.c,v 1.13 2003/11/09 23:36:46 sam Exp $");
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__FBSDID("$FreeBSD: src/sys/net80211/ieee80211_node.c,v 1.22 2004/04/05 04:15:55 sam Exp $");
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#else
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__KERNEL_RCSID(0, "$NetBSD: ieee80211_node.c,v 1.10 2004/01/13 23:37:30 dyoung Exp $");
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__KERNEL_RCSID(0, "$NetBSD: ieee80211_node.c,v 1.11 2004/04/30 23:58:14 dyoung Exp $");
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#endif
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#include "opt_inet.h"
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@ -96,7 +96,7 @@ static void ieee80211_setup_node(struct ieee80211com *ic,
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static void _ieee80211_free_node(struct ieee80211com *,
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struct ieee80211_node *);
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MALLOC_DEFINE(M_80211_NODE, "node", "802.11 node state");
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MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state");
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void
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ieee80211_node_attach(struct ifnet *ifp)
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@ -119,10 +119,13 @@ void
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ieee80211_node_lateattach(struct ifnet *ifp)
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{
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struct ieee80211com *ic = (void *)ifp;
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struct ieee80211_node *ni;
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ic->ic_bss = (*ic->ic_node_alloc)(ic);
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IASSERT(ic->ic_bss != NULL, ("unable to setup inital BSS node"));
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ic->ic_bss->ni_chan = IEEE80211_CHAN_ANYC;
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ni = (*ic->ic_node_alloc)(ic);
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IASSERT(ni != NULL, ("unable to setup inital BSS node"));
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ni->ni_chan = IEEE80211_CHAN_ANYC;
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ic->ic_bss = ni;
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ic->ic_txpower = IEEE80211_TXPOWER_MAX;
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}
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void
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@ -284,6 +287,7 @@ ieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni)
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if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
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fail |= 0x04;
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} else {
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/* XXX does this mean privacy is supported or required? */
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if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
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fail |= 0x04;
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}
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@ -292,12 +296,12 @@ ieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni)
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fail |= 0x08;
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if (ic->ic_des_esslen != 0 &&
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(ni->ni_esslen != ic->ic_des_esslen ||
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memcmp(ni->ni_essid, ic->ic_des_essid,
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ic->ic_des_esslen != 0)))
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memcmp(ni->ni_essid, ic->ic_des_essid, ic->ic_des_esslen) != 0))
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fail |= 0x10;
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if ((ic->ic_flags & IEEE80211_F_DESBSSID) &&
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!IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid))
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fail |= 0x20;
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#ifdef IEEE80211_DEBUG
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if (ifp->if_flags & IFF_DEBUG) {
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printf(" %c %s", fail ? '-' : '+',
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ether_sprintf(ni->ni_macaddr));
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@ -320,6 +324,7 @@ ieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni)
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ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
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printf("%s\n", fail & 0x10 ? "!" : "");
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}
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#endif
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return fail;
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}
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@ -420,6 +425,14 @@ ieee80211_end_scan(struct ifnet *ifp)
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goto notfound;
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}
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ieee80211_unref_node(&selbs);
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/*
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* Discard scan set; the nodes have a refcnt of zero
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* and have not asked the driver to setup private
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* node state. Let them be repopulated on demand either
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* through transmission (ieee80211_find_txnode) or receipt
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* of a probe response (to be added).
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*/
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ieee80211_free_allnodes(ic);
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ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
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} else {
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ieee80211_unref_node(&selbs);
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@ -448,18 +461,20 @@ ieee80211_get_rate(struct ieee80211com *ic)
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static struct ieee80211_node *
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ieee80211_node_alloc(struct ieee80211com *ic)
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{
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return malloc(sizeof(struct ieee80211_node), M_80211_NODE,
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M_NOWAIT | M_ZERO);
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struct ieee80211_node *ni;
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MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node),
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M_80211_NODE, M_NOWAIT | M_ZERO);
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return ni;
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}
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static void
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ieee80211_node_free(struct ieee80211com *ic, struct ieee80211_node *ni)
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{
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if (ni->ni_challenge != NULL) {
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free(ni->ni_challenge, M_DEVBUF);
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FREE(ni->ni_challenge, M_DEVBUF);
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ni->ni_challenge = NULL;
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}
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free(ni, M_80211_NODE);
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FREE(ni, M_80211_NODE);
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}
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static void
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@ -509,6 +524,8 @@ ieee80211_alloc_node(struct ieee80211com *ic, u_int8_t *macaddr)
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struct ieee80211_node *ni = (*ic->ic_node_alloc)(ic);
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if (ni != NULL)
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ieee80211_setup_node(ic, ni, macaddr);
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else
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ic->ic_stats.is_rx_nodealloc++;
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return ni;
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}
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@ -517,31 +534,53 @@ ieee80211_dup_bss(struct ieee80211com *ic, u_int8_t *macaddr)
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{
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struct ieee80211_node *ni = (*ic->ic_node_alloc)(ic);
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if (ni != NULL) {
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memcpy(ni, ic->ic_bss, sizeof(struct ieee80211_node));
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ieee80211_setup_node(ic, ni, macaddr);
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}
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/*
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* Inherit from ic_bss.
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*/
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IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid);
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ni->ni_chan = ic->ic_bss->ni_chan;
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} else
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ic->ic_stats.is_rx_nodealloc++;
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return ni;
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}
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static struct ieee80211_node *
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_ieee80211_find_node(struct ieee80211com *ic, u_int8_t *macaddr)
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{
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struct ieee80211_node *ni;
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int hash;
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#ifdef __FreeBSD__
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IEEE80211_NODE_LOCK_ASSERT(ic);
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#endif /* __FreeBSD__ */
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hash = IEEE80211_NODE_HASH(macaddr);
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LIST_FOREACH(ni, &ic->ic_hash[hash], ni_hash) {
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if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
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ieee80211_node_incref(ni); /* mark referenced */
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return ni;
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}
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}
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return NULL;
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}
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struct ieee80211_node *
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ieee80211_find_node(struct ieee80211com *ic, u_int8_t *macaddr)
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{
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struct ieee80211_node *ni;
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int hash;
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ieee80211_node_critsec_decl(s);
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hash = IEEE80211_NODE_HASH(macaddr);
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ieee80211_node_critsec_begin(ic, s);
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LIST_FOREACH(ni, &ic->ic_hash[hash], ni_hash) {
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if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
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ieee80211_node_incref(ni); /* mark referenced */
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break;
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}
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}
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ni = _ieee80211_find_node(ic, macaddr);
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ieee80211_node_critsec_end(ic, s);
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return ni;
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}
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/*
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* Return a reference to the appropriate node for sending
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* a data frame. This handles node discovery in adhoc networks.
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*/
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struct ieee80211_node *
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ieee80211_find_txnode(struct ieee80211com *ic, u_int8_t *macaddr)
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{
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@ -550,27 +589,36 @@ ieee80211_find_txnode(struct ieee80211com *ic, u_int8_t *macaddr)
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/*
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* The destination address should be in the node table
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* unless this is a multicast/broadcast frames or we are
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* in station mode.
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* unless we are operating in station mode or this is a
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* multicast/broadcast frame.
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*/
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if (IEEE80211_IS_MULTICAST(macaddr) || ic->ic_opmode == IEEE80211_M_STA)
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if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr))
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return ic->ic_bss;
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/* XXX can't hold lock across dup_bss 'cuz of recursive locking */
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ieee80211_node_critsec_begin(ic, s);
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ni = ieee80211_find_node(ic, macaddr);
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if (ni == NULL) {
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if (ic->ic_opmode != IEEE80211_M_MONITOR)
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ni = ieee80211_dup_bss(ic, macaddr);
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IEEE80211_DPRINTF(("%s: faked-up node %p for %s\n",
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__func__, ni, ether_sprintf(macaddr)));
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if (ni == NULL) {
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ieee80211_node_critsec_end(ic, s);
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/* ic->ic_stats.st_tx_nonode++; XXX statistic */
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return NULL;
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}
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(void)ieee80211_ref_node(ni);
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}
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ni = _ieee80211_find_node(ic, macaddr);
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ieee80211_node_critsec_end(ic, s);
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if (ni == NULL &&
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(ic->ic_opmode == IEEE80211_M_IBSS ||
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ic->ic_opmode == IEEE80211_M_AHDEMO)) {
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/*
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* Fake up a node; this handles node discovery in
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* adhoc mode. Note that for the driver's benefit
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* we we treat this like an association so the driver
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* has an opportunity to setup it's private state.
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*
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* XXX need better way to handle this; issue probe
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* request so we can deduce rate set, etc.
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*/
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ni = ieee80211_dup_bss(ic, macaddr);
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if (ni != NULL) {
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/* XXX no rate negotiation; just dup */
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ni->ni_rates = ic->ic_bss->ni_rates;
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if (ic->ic_newassoc)
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(*ic->ic_newassoc)(ic, ni, 1);
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}
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}
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return ni;
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}
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@ -654,12 +702,12 @@ ieee80211_find_rxnode(struct ieee80211com *ic, struct ieee80211_frame *wh)
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u_int8_t *bssid;
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ieee80211_node_critsec_decl(s);
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ieee80211_node_critsec_begin(ic, s);
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if (!ieee80211_needs_rxnode(ic, wh, &bssid))
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return ieee80211_ref_node(ic->ic_bss);
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ni = ieee80211_find_node(ic, wh->i_addr2);
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ieee80211_node_critsec_begin(ic, s);
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ni = _ieee80211_find_node(ic, wh->i_addr2);
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ieee80211_node_critsec_end(ic, s);
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if (ni == NULL) {
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if (ic->ic_opmode != IEEE80211_M_HOSTAP) {
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@ -672,7 +720,6 @@ ieee80211_find_rxnode(struct ieee80211com *ic, struct ieee80211_frame *wh)
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}
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ni = ieee80211_ref_node((ni == NULL) ? ic->ic_bss : ni);
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}
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ieee80211_node_critsec_end(ic, s);
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IASSERT(ni != NULL, ("%s: null node", __func__));
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return ni;
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}
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@ -691,7 +738,8 @@ ieee80211_lookup_node(struct ieee80211com *ic,
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hash = IEEE80211_NODE_HASH(macaddr);
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ieee80211_node_critsec_begin(ic, s);
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LIST_FOREACH(ni, &ic->ic_hash[hash], ni_hash) {
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if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && ni->ni_chan == chan) {
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if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) &&
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ni->ni_chan == chan) {
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ieee80211_node_incref(ni);/* mark referenced */
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break;
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}
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