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NetBSD/sys/net80211/ieee80211_netbsd.c

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/* $NetBSD: ieee80211_netbsd.c,v 1.31 2018/04/27 06:56:21 maxv Exp $ */
/*
* Copyright (c) 2003-2005 Sam Leffler, Errno Consulting
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifdef __FreeBSD__
__FBSDID("$FreeBSD: src/sys/net80211/ieee80211_freebsd.c,v 1.8 2005/08/08 18:46:35 sam Exp $");
#else
__KERNEL_RCSID(0, "$NetBSD: ieee80211_netbsd.c,v 1.31 2018/04/27 06:56:21 maxv Exp $");
#endif
/*
* IEEE 802.11 support (NetBSD-specific code)
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <sys/once.h>
#include <sys/socket.h>
#include <sys/cprng.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/if_ether.h>
#include <net/route.h>
#include <net80211/ieee80211_netbsd.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_sysctl.h>
#define LOGICALLY_EQUAL(x, y) (!(x) == !(y))
static void ieee80211_sysctl_fill_node(struct ieee80211_node *,
struct ieee80211_node_sysctl *, int, const struct ieee80211_channel *,
uint32_t);
static struct ieee80211_node *ieee80211_node_walknext(
struct ieee80211_node_walk *);
static struct ieee80211_node *ieee80211_node_walkfirst(
struct ieee80211_node_walk *, u_short);
static int ieee80211_sysctl_node(SYSCTLFN_ARGS);
static void ieee80211_sysctl_setup(void);
#ifdef IEEE80211_DEBUG
int ieee80211_debug = 0;
#endif
typedef void (*ieee80211_setup_func)(void);
__link_set_decl(ieee80211_funcs, ieee80211_setup_func);
static int
ieee80211_init0(void)
{
ieee80211_setup_func * const *ieee80211_setup, f;
ieee80211_sysctl_setup();
if (max_linkhdr < ALIGN(sizeof(struct ieee80211_qosframe_addr4))) {
max_linkhdr = ALIGN(sizeof(struct ieee80211_qosframe_addr4));
}
__link_set_foreach(ieee80211_setup, ieee80211_funcs) {
f = (void*)*ieee80211_setup;
(*f)();
}
return 0;
}
void
ieee80211_init(void)
{
static ONCE_DECL(ieee80211_init_once);
RUN_ONCE(&ieee80211_init_once, ieee80211_init0);
}
static int
ieee80211_sysctl_inact(SYSCTLFN_ARGS)
{
int error, t;
struct sysctlnode node;
node = *rnode;
/*
* sysctl_lookup copies the product from t. Then, it
* copies the new value onto t.
*/
t = *(int*)rnode->sysctl_data * IEEE80211_INACT_WAIT;
node.sysctl_data = &t;
error = sysctl_lookup(SYSCTLFN_CALL(&node));
if (error || newp == NULL)
return error;
/*
* The new value was in seconds. Convert to inactivity-wait
* intervals. There are IEEE80211_INACT_WAIT seconds per
* interval.
*/
*(int*)rnode->sysctl_data = t / IEEE80211_INACT_WAIT;
return 0;
}
static int
ieee80211_sysctl_parent(SYSCTLFN_ARGS)
{
struct ieee80211com *ic;
char pname[IFNAMSIZ];
struct sysctlnode node;
node = *rnode;
ic = node.sysctl_data;
strlcpy(pname, ic->ic_ifp->if_xname, IFNAMSIZ);
node.sysctl_data = pname;
return sysctl_lookup(SYSCTLFN_CALL(&node));
}
/*
* Create or get top of sysctl tree net.link.ieee80211.
*/
static const struct sysctlnode *
ieee80211_sysctl_treetop(struct sysctllog **log)
{
int rc;
const struct sysctlnode *rnode;
if ((rc = sysctl_createv(log, 0, NULL, &rnode,
CTLFLAG_PERMANENT, CTLTYPE_NODE, "link",
"link-layer statistics and controls",
NULL, 0, NULL, 0, CTL_NET, PF_LINK, CTL_EOL)) != 0)
goto err;
if ((rc = sysctl_createv(log, 0, &rnode, &rnode,
CTLFLAG_PERMANENT, CTLTYPE_NODE, "ieee80211",
"IEEE 802.11 WLAN statistics and controls",
NULL, 0, NULL, 0, CTL_CREATE, CTL_EOL)) != 0)
goto err;
return rnode;
err:
printf("%s: sysctl_createv failed, rc = %d\n", __func__, rc);
return NULL;
}
void
ieee80211_sysctl_attach(struct ieee80211com *ic)
{
int rc;
const struct sysctlnode *cnode, *rnode;
char num[sizeof("vap") + 14]; /* sufficient for 32 bits */
if ((rnode = ieee80211_sysctl_treetop(NULL)) == NULL)
return;
snprintf(num, sizeof(num), "vap%u", ic->ic_vap);
if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &rnode,
CTLFLAG_PERMANENT, CTLTYPE_NODE, num, SYSCTL_DESCR("virtual AP"),
NULL, 0, NULL, 0, CTL_CREATE, CTL_EOL)) != 0)
goto err;
/* control debugging printfs */
if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode,
CTLFLAG_PERMANENT|CTLFLAG_READONLY, CTLTYPE_STRING,
"parent", SYSCTL_DESCR("parent device"),
ieee80211_sysctl_parent, 0, (void *)ic, IFNAMSIZ, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
#ifdef IEEE80211_DEBUG
/* control debugging printfs */
if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT,
"debug", SYSCTL_DESCR("control debugging printfs"),
NULL, ieee80211_debug, &ic->ic_debug, 0,
CTL_CREATE, CTL_EOL)) != 0)
goto err;
#endif
/* XXX inherit from tunables */
if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT,
"inact_run", SYSCTL_DESCR("station inactivity timeout (sec)"),
ieee80211_sysctl_inact, 0, &ic->ic_inact_run, 0,
CTL_CREATE, CTL_EOL)) != 0)
goto err;
if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT,
"inact_probe",
SYSCTL_DESCR("station inactivity probe timeout (sec)"),
ieee80211_sysctl_inact, 0, &ic->ic_inact_probe, 0,
CTL_CREATE, CTL_EOL)) != 0)
goto err;
if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT,
"inact_auth",
SYSCTL_DESCR("station authentication timeout (sec)"),
ieee80211_sysctl_inact, 0, &ic->ic_inact_auth, 0,
CTL_CREATE, CTL_EOL)) != 0)
goto err;
if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT,
"inact_init",
SYSCTL_DESCR("station initial state timeout (sec)"),
ieee80211_sysctl_inact, 0, &ic->ic_inact_init, 0,
CTL_CREATE, CTL_EOL)) != 0)
goto err;
if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT,
"driver_caps", SYSCTL_DESCR("driver capabilities"),
NULL, 0, &ic->ic_caps, 0, CTL_CREATE, CTL_EOL)) != 0)
goto err;
if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT,
"bmiss_max", SYSCTL_DESCR("consecutive beacon misses before scanning"),
NULL, 0, &ic->ic_bmiss_max, 0, CTL_CREATE, CTL_EOL)) != 0)
goto err;
return;
err:
printf("%s: sysctl_createv failed, rc = %d\n", __func__, rc);
}
void
ieee80211_sysctl_detach(struct ieee80211com *ic)
{
sysctl_teardown(&ic->ic_sysctllog);
}
/*
* Pointers for testing:
*
* If there are no interfaces, or else no 802.11 interfaces,
* ieee80211_node_walkfirst must return NULL.
*
* If there is any single 802.11 interface, ieee80211_node_walkfirst
* must not return NULL.
*/
static struct ieee80211_node *
ieee80211_node_walkfirst(struct ieee80211_node_walk *nw, u_short if_index)
{
memset(nw, 0, sizeof(*nw));
nw->nw_ifindex = if_index;
LIST_FOREACH(nw->nw_ic, &ieee80211com_head, ic_list) {
if (if_index != 0 && nw->nw_ic->ic_ifp->if_index != if_index)
continue;
if (!TAILQ_EMPTY(&nw->nw_ic->ic_sta.nt_node))
nw->nw_nt = &nw->nw_ic->ic_sta;
else if (!TAILQ_EMPTY(&nw->nw_ic->ic_scan.nt_node))
nw->nw_nt = &nw->nw_ic->ic_scan;
else if (nw->nw_ic->ic_bss == NULL)
continue;
break;
}
if (nw->nw_ic == NULL)
return NULL;
if (nw->nw_nt == NULL)
nw->nw_ni = nw->nw_ic->ic_bss;
else
nw->nw_ni = TAILQ_FIRST(&nw->nw_nt->nt_node);
return nw->nw_ni;
}
static struct ieee80211_node *
ieee80211_node_walknext(struct ieee80211_node_walk *nw)
{
if (nw->nw_nt != NULL)
nw->nw_ni = TAILQ_NEXT(nw->nw_ni, ni_list);
else
nw->nw_ni = NULL;
while (nw->nw_ni == NULL) {
if (nw->nw_nt == &nw->nw_ic->ic_sta) {
nw->nw_nt = &nw->nw_ic->ic_scan;
nw->nw_ni = TAILQ_FIRST(&nw->nw_nt->nt_node);
continue;
} else if (nw->nw_nt == &nw->nw_ic->ic_scan) {
nw->nw_nt = NULL;
nw->nw_ni = nw->nw_ic->ic_bss;
continue;
}
KASSERT(nw->nw_nt == NULL);
if (nw->nw_ifindex != 0)
return NULL;
nw->nw_ic = LIST_NEXT(nw->nw_ic, ic_list);
if (nw->nw_ic == NULL)
return NULL;
nw->nw_nt = &nw->nw_ic->ic_sta;
nw->nw_ni = TAILQ_FIRST(&nw->nw_nt->nt_node);
}
return nw->nw_ni;
}
static void
ieee80211_sysctl_fill_node(struct ieee80211_node *ni,
struct ieee80211_node_sysctl *ns, int ifindex,
const struct ieee80211_channel *chan0, uint32_t flags)
{
memset(ns, 0, sizeof(*ns));
ns->ns_ifindex = ifindex;
ns->ns_capinfo = ni->ni_capinfo;
ns->ns_flags = flags;
memcpy(ns->ns_macaddr, ni->ni_macaddr, sizeof(ns->ns_macaddr));
memcpy(ns->ns_bssid, ni->ni_bssid, sizeof(ns->ns_bssid));
if (ni->ni_chan != IEEE80211_CHAN_ANYC) {
ns->ns_freq = ni->ni_chan->ic_freq;
ns->ns_chanflags = ni->ni_chan->ic_flags;
ns->ns_chanidx = ni->ni_chan - chan0;
} else {
ns->ns_freq = ns->ns_chanflags = 0;
ns->ns_chanidx = 0;
}
ns->ns_rssi = ni->ni_rssi;
ns->ns_esslen = ni->ni_esslen;
memcpy(ns->ns_essid, ni->ni_essid, sizeof(ns->ns_essid));
ns->ns_erp = ni->ni_erp;
ns->ns_associd = ni->ni_associd;
ns->ns_inact = ni->ni_inact * IEEE80211_INACT_WAIT;
ns->ns_rstamp = ni->ni_rstamp;
ns->ns_rates = ni->ni_rates;
ns->ns_txrate = ni->ni_txrate;
ns->ns_intval = ni->ni_intval;
memcpy(ns->ns_tstamp, &ni->ni_tstamp, sizeof(ns->ns_tstamp));
ns->ns_txseq = ni->ni_txseqs[0];
ns->ns_rxseq = ni->ni_rxseqs[0];
ns->ns_fhdwell = ni->ni_fhdwell;
ns->ns_fhindex = ni->ni_fhindex;
ns->ns_fails = ni->ni_fails;
}
/* Between two examinations of the sysctl tree, I expect each
* interface to add no more than 5 nodes.
*/
#define IEEE80211_SYSCTL_NODE_GROWTH 5
static int
ieee80211_sysctl_node(SYSCTLFN_ARGS)
{
struct ieee80211_node_walk nw;
struct ieee80211_node *ni;
struct ieee80211_node_sysctl ns;
char *dp;
u_int cur_ifindex, ifcount, ifindex, last_ifindex, op, arg, hdr_type;
uint32_t flags;
size_t len, needed, eltsize, out_size;
int error, s, saw_bss = 0, nelt;
if (namelen == 1 && name[0] == CTL_QUERY)
return (sysctl_query(SYSCTLFN_CALL(rnode)));
if (namelen != IEEE80211_SYSCTL_NODENAMELEN)
return (EINVAL);
/* ifindex.op.arg.header-type.eltsize.nelt */
dp = oldp;
len = (oldp != NULL) ? *oldlenp : 0;
ifindex = name[IEEE80211_SYSCTL_NODENAME_IF];
op = name[IEEE80211_SYSCTL_NODENAME_OP];
arg = name[IEEE80211_SYSCTL_NODENAME_ARG];
hdr_type = name[IEEE80211_SYSCTL_NODENAME_TYPE];
eltsize = name[IEEE80211_SYSCTL_NODENAME_ELTSIZE];
nelt = name[IEEE80211_SYSCTL_NODENAME_ELTCOUNT];
out_size = MIN(sizeof(ns), eltsize);
if (op != IEEE80211_SYSCTL_OP_ALL || arg != 0 ||
hdr_type != IEEE80211_SYSCTL_T_NODE || eltsize < 1 || nelt < 0)
return (EINVAL);
error = 0;
needed = 0;
ifcount = 0;
last_ifindex = 0;
s = splnet();
for (ni = ieee80211_node_walkfirst(&nw, ifindex); ni != NULL;
ni = ieee80211_node_walknext(&nw)) {
struct ieee80211com *ic;
ic = nw.nw_ic;
cur_ifindex = ic->ic_ifp->if_index;
if (cur_ifindex != last_ifindex) {
saw_bss = 0;
ifcount++;
last_ifindex = cur_ifindex;
}
if (nelt <= 0)
continue;
if (saw_bss && ni == ic->ic_bss)
continue;
else if (ni == ic->ic_bss) {
saw_bss = 1;
flags = IEEE80211_NODE_SYSCTL_F_BSS;
} else
flags = 0;
if (ni->ni_table == &ic->ic_scan)
flags |= IEEE80211_NODE_SYSCTL_F_SCAN;
else if (ni->ni_table == &ic->ic_sta)
flags |= IEEE80211_NODE_SYSCTL_F_STA;
if (len >= eltsize) {
ieee80211_sysctl_fill_node(ni, &ns, cur_ifindex,
&ic->ic_channels[0], flags);
error = copyout(&ns, dp, out_size);
if (error)
goto cleanup;
dp += eltsize;
len -= eltsize;
}
needed += eltsize;
if (nelt != INT_MAX)
nelt--;
}
cleanup:
splx(s);
*oldlenp = needed;
if (oldp == NULL)
*oldlenp += ifcount * IEEE80211_SYSCTL_NODE_GROWTH * eltsize;
return (error);
}
/*
* Setup sysctl(3) MIB, net.ieee80211.*
*
* TBD condition CTLFLAG_PERMANENT on being a module or not
*/
static struct sysctllog *ieee80211_sysctllog;
static void
ieee80211_sysctl_setup(void)
{
int rc;
const struct sysctlnode *rnode;
if ((rnode = ieee80211_sysctl_treetop(&ieee80211_sysctllog)) == NULL)
return;
if ((rc = sysctl_createv(&ieee80211_sysctllog, 0, &rnode, NULL,
CTLFLAG_PERMANENT, CTLTYPE_NODE, "nodes", "client/peer stations",
ieee80211_sysctl_node, 0, NULL, 0, CTL_CREATE, CTL_EOL)) != 0)
goto err;
#ifdef IEEE80211_DEBUG
/* control debugging printfs */
if ((rc = sysctl_createv(&ieee80211_sysctllog, 0, &rnode, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT,
"debug", SYSCTL_DESCR("control debugging printfs"),
NULL, 0, &ieee80211_debug, 0, CTL_CREATE, CTL_EOL)) != 0)
goto err;
#endif
ieee80211_rssadapt_sysctl_setup(&ieee80211_sysctllog);
return;
err:
printf("%s: sysctl_createv failed (rc = %d)\n", __func__, rc);
}
int
ieee80211_node_dectestref(struct ieee80211_node *ni)
{
if (atomic_dec_uint_nv(&ni->ni_refcnt) == 0) {
atomic_inc_uint(&ni->ni_refcnt);
return 1;
} else
return 0;
}
void
ieee80211_drain_ifq(struct ifqueue *ifq)
{
struct ieee80211_node *ni;
struct mbuf *m;
for (;;) {
IF_DEQUEUE(ifq, m);
if (m == NULL)
break;
ni = M_GETCTX(m, struct ieee80211_node *);
KASSERT(ni != NULL);
ieee80211_free_node(ni);
M_SETCTX(m, NULL);
m_freem(m);
}
}
void
if_printf(struct ifnet *ifp, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
printf("%s: ", ifp->if_xname);
vprintf(fmt, ap);
va_end(ap);
return;
}
/*
* Allocate and setup a management frame of the specified
* size. We return the mbuf and a pointer to the start
* of the contiguous data area that's been reserved based
* on the packet length. The data area is forced to 32-bit
* alignment and the buffer length to a multiple of 4 bytes.
* This is done mainly so beacon frames (that require this)
* can use this interface too.
*/
struct mbuf *
ieee80211_getmgtframe(u_int8_t **frm, u_int pktlen)
{
struct mbuf *m;
u_int len;
/*
* NB: we know the mbuf routines will align the data area
* so we don't need to do anything special.
*/
/* XXX 4-address frame? */
len = roundup(sizeof(struct ieee80211_frame) + pktlen, 4);
IASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len));
if (len <= MHLEN) {
m = m_gethdr(M_NOWAIT, MT_HEADER);
/*
* Align the data in case additional headers are added.
* This should only happen when a WEP header is added
* which only happens for shared key authentication mgt
* frames which all fit in MHLEN.
*/
if (m != NULL)
MH_ALIGN(m, len);
} else {
m = m_getcl(M_NOWAIT, MT_HEADER, M_PKTHDR);
}
if (m != NULL) {
m->m_data += sizeof(struct ieee80211_frame);
*frm = m->m_data;
IASSERT((uintptr_t)*frm % 4 == 0, ("bad beacon boundary"));
}
return m;
}
void
get_random_bytes(void *p, size_t n)
{
cprng_fast(p, n);
}
void
ieee80211_notify_node_join(struct ieee80211com *ic, struct ieee80211_node *ni,
int newassoc)
{
struct ifnet *ifp = ic->ic_ifp;
struct ieee80211_join_event iev;
IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, "%snode %s join\n",
(ni == ic->ic_bss) ? "bss " : "",
ether_sprintf(ni->ni_macaddr));
memset(&iev, 0, sizeof(iev));
if (ni == ic->ic_bss) {
IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_bssid);
rt_ieee80211msg(ifp, newassoc ?
RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC,
&iev, sizeof(iev));
if_link_state_change(ifp, LINK_STATE_UP);
} else {
IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_macaddr);
rt_ieee80211msg(ifp, newassoc ?
RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN,
&iev, sizeof(iev));
}
}
void
ieee80211_notify_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni)
{
struct ifnet *ifp = ic->ic_ifp;
struct ieee80211_leave_event iev;
IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, "%snode %s leave\n",
(ni == ic->ic_bss) ? "bss " : "",
ether_sprintf(ni->ni_macaddr));
if (ni == ic->ic_bss) {
rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0);
if_link_state_change(ifp, LINK_STATE_DOWN);
} else {
/* fire off wireless event station leaving */
memset(&iev, 0, sizeof(iev));
IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_macaddr);
rt_ieee80211msg(ifp, RTM_IEEE80211_LEAVE, &iev, sizeof(iev));
}
}
void
ieee80211_notify_scan_done(struct ieee80211com *ic)
{
struct ifnet *ifp = ic->ic_ifp;
IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN,
"%s", "notify scan done\n");
/* dispatch wireless event indicating scan completed */
rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0);
}
void
ieee80211_notify_replay_failure(struct ieee80211com *ic,
const struct ieee80211_frame *wh, const struct ieee80211_key *k,
u_int64_t rsc)
{
struct ifnet *ifp = ic->ic_ifp;
IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
"[%s] %s replay detected <rsc %ju, csc %ju, keyix %u rxkeyix %u>\n",
ether_sprintf(wh->i_addr2), k->wk_cipher->ic_name,
(intmax_t) rsc, (intmax_t) k->wk_keyrsc,
k->wk_keyix, k->wk_rxkeyix);
if (ifp != NULL) { /* NB: for cipher test modules */
struct ieee80211_replay_event iev;
IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
iev.iev_cipher = k->wk_cipher->ic_cipher;
if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE)
iev.iev_keyix = k->wk_rxkeyix;
else
iev.iev_keyix = k->wk_keyix;
iev.iev_keyrsc = k->wk_keyrsc;
iev.iev_rsc = rsc;
rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev));
}
}
void
ieee80211_notify_michael_failure(struct ieee80211com *ic,
const struct ieee80211_frame *wh, u_int keyix)
{
struct ifnet *ifp = ic->ic_ifp;
IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
"[%s] michael MIC verification failed <keyix %u>\n",
ether_sprintf(wh->i_addr2), keyix);
ic->ic_stats.is_rx_tkipmic++;
if (ifp != NULL) { /* NB: for cipher test modules */
struct ieee80211_michael_event iev;
IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
iev.iev_cipher = IEEE80211_CIPHER_TKIP;
iev.iev_keyix = keyix;
rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev));
}
}
void
ieee80211_load_module(const char *modname)
{
#ifdef notyet
struct thread *td = curthread;
if (suser(td) == 0 && securelevel_gt(td->td_ucred, 0) == 0) {
mtx_lock(&Giant);
(void) linker_load_module(modname, NULL, NULL, NULL, NULL);
mtx_unlock(&Giant);
}
#else
printf("%s: load the %s module by hand for now.\n", __func__, modname);
#endif
}
/* -------------------------------------------------------------------------- */
/*
* Set the m_data pointer of a newly-allocated mbuf
* to place an object of the specified size at the
* end of the mbuf, longword aligned.
*/
void
m_align(struct mbuf *m, int len)
{
int adjust;
KASSERT(len != M_COPYALL);
if (m->m_flags & M_EXT)
adjust = m->m_ext.ext_size - len;
else if (m->m_flags & M_PKTHDR)
adjust = MHLEN - len;
else
adjust = MLEN - len;
m->m_data += adjust &~ (sizeof(long)-1);
}
/*
* Append the specified data to the indicated mbuf chain,
* Extend the mbuf chain if the new data does not fit in
* existing space.
*
* Return 1 if able to complete the job; otherwise 0.
*/
int
m_append(struct mbuf *m0, int len, const void *cpv)
{
struct mbuf *m, *n;
int remainder, space;
const char *cp = cpv;
KASSERT(len != M_COPYALL);
for (m = m0; m->m_next != NULL; m = m->m_next)
continue;
remainder = len;
space = M_TRAILINGSPACE(m);
if (space > 0) {
/*
* Copy into available space.
*/
if (space > remainder)
space = remainder;
memmove(mtod(m, char *) + m->m_len, cp, space);
m->m_len += space;
cp = cp + space, remainder -= space;
}
while (remainder > 0) {
/*
* Allocate a new mbuf; could check space
* and allocate a cluster instead.
*/
n = m_get(M_DONTWAIT, m->m_type);
if (n == NULL)
break;
n->m_len = min(MLEN, remainder);
memmove(mtod(n, void *), cp, n->m_len);
cp += n->m_len, remainder -= n->m_len;
m->m_next = n;
m = n;
}
if (m0->m_flags & M_PKTHDR)
m0->m_pkthdr.len += len - remainder;
return (remainder == 0);
}
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