/* $NetBSD: ieee80211_netbsd.c,v 1.7 2005/09/24 23:57:12 dyoung 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 #ifdef __FreeBSD__ __FBSDID("$FreeBSD: src/sys/net80211/ieee80211_freebsd.c,v 1.6 2005/01/22 20:29:23 sam Exp $"); #else __KERNEL_RCSID(0, "$NetBSD: ieee80211_netbsd.c,v 1.7 2005/09/24 23:57:12 dyoung Exp $"); #endif /* * IEEE 802.11 support (FreeBSD-specific code) */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define LOGICALLY_EQUAL(x, y) (!(x) == !(y)) static void ieee80211_sysctl_fill_node(struct ieee80211_node *, struct ieee80211_node_sysctl *, int, struct ieee80211_channel *, int); 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); #ifdef IEEE80211_DEBUG int ieee80211_debug = 0; #endif 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; strncpy(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, "net", NULL, NULL, 0, NULL, 0, CTL_NET, CTL_EOL)) != 0) goto err; if ((rc = sysctl_createv(log, 0, &rnode, &rnode, CTLFLAG_PERMANENT, CTLTYPE_NODE, "link", "link-layer statistics and controls", NULL, 0, NULL, 0, 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, 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; 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) { (void)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, struct ieee80211_channel *chan0, int is_bss) { ns->ns_ifindex = ifindex; ns->ns_capinfo = ni->ni_capinfo; ns->ns_flags = (is_bss) ? IEEE80211_NODE_SYSCTL_F_BSS : 0; (void)memcpy(ns->ns_macaddr, ni->ni_macaddr, sizeof(ns->ns_macaddr)); (void)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; (void)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; (void)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; 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; if (len >= eltsize) { ieee80211_sysctl_fill_node(ni, &ns, cur_ifindex, &ic->ic_channels[0], ni == ic->ic_bss); 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 an LKM or not */ SYSCTL_SETUP(sysctl_ieee80211, "sysctl ieee80211 subtree setup") { int rc; const struct sysctlnode *cnode, *rnode; if ((rnode = ieee80211_sysctl_treetop(clog)) == NULL) return; if ((rc = sysctl_createv(clog, 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(clog, 0, &rnode, &cnode, 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_DEBUG */ return; err: printf("%s: sysctl_createv failed (rc = %d)\n", __func__, rc); } int ieee80211_node_dectestref(struct ieee80211_node *ni) { int rc, s; s = splnet(); if (--ni->ni_refcnt == 0) { rc = 1; ni->ni_refcnt = 1; } else rc = 0; splx(s); return rc; } 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; } struct mbuf * m_getcl(int how, int type, int flags) { struct mbuf *m; if ((flags & M_PKTHDR) != 0) MGETHDR(m, how, type); else MGET(m, how, type); if (m == NULL) return NULL; MCLGET(m, flags); if ((m->m_flags & M_EXT) == 0) { m_free(m); return NULL; } return m; } /* * 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, caddr_t cp) { struct mbuf *m, *n; int remainder, space; for (m = m0; m->m_next != NULL; m = m->m_next) ; remainder = len; space = M_TRAILINGSPACE(m); if (space > 0) { /* * Copy into available space. */ if (space > remainder) space = remainder; memmove(mtod(m, caddr_t) + m->m_len, cp, space); m->m_len += space; 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, caddr_t), 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); } /* * 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; } return m; } void get_random_bytes(void *p, size_t n) { u_int8_t *dp = p; while (n > 0) { u_int32_t v = arc4random(); size_t nb = n > sizeof(u_int32_t) ? sizeof(u_int32_t) : n; (void)memcpy(dp, &v, nb); dp += sizeof(u_int32_t), n -= nb; } } 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, "%s: %snode %s join\n", ifp->if_xname, (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 if (newassoc) { /* fire off wireless event only for new station */ IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_macaddr); rt_ieee80211msg(ifp, RTM_IEEE80211_JOIN, &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, "%s: %snode %s leave\n", ifp->if_xname, (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", ic->ic_ifp->if_xname); /* 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 \n", ether_sprintf(wh->i_addr2), k->wk_cipher->ic_name, (intmax_t) rsc, (intmax_t) k->wk_keyrsc, k->wk_keyix); 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; 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 \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 }