2 * Copyright (c) 2011 Adrian Chadd, Xenion Lty Ltd
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
32 * net80211 fast-logging support, primarily for debugging.
34 * This implements a single debugging queue which includes
35 * per-device enumeration where needed.
40 #include <sys/param.h>
41 #include <sys/systm.h>
43 #include <sys/malloc.h>
44 #include <sys/endian.h>
45 #include <sys/kernel.h>
46 #include <sys/sysctl.h>
49 #include <sys/ucred.h>
52 #include <sys/socket.h>
55 #include <net/if_var.h>
56 #include <net/if_media.h>
57 #include <net/ethernet.h>
59 #include <net80211/ieee80211_var.h>
60 #include <net80211/ieee80211_freebsd.h>
61 #include <net80211/ieee80211_alq.h>
63 static struct alq *ieee80211_alq;
64 static int ieee80211_alq_lost;
65 static int ieee80211_alq_logged;
66 static char ieee80211_alq_logfile[MAXPATHLEN] = "/tmp/net80211.log";
67 static unsigned int ieee80211_alq_qsize = 64*1024;
70 ieee80211_alq_setlogging(int enable)
76 alq_close(ieee80211_alq);
78 error = alq_open(&ieee80211_alq,
79 ieee80211_alq_logfile,
82 ieee80211_alq_qsize, 0);
83 ieee80211_alq_lost = 0;
84 ieee80211_alq_logged = 0;
85 printf("net80211: logging to %s enabled; "
86 "struct size %d bytes\n",
87 ieee80211_alq_logfile,
88 (int) sizeof(struct ieee80211_alq_rec));
91 alq_close(ieee80211_alq);
93 printf("net80211: logging disabled\n");
100 sysctl_ieee80211_alq_log(SYSCTL_HANDLER_ARGS)
104 enable = (ieee80211_alq != NULL);
105 error = sysctl_handle_int(oidp, &enable, 0, req);
106 if (error || !req->newptr)
109 return (ieee80211_alq_setlogging(enable));
112 SYSCTL_PROC(_net_wlan, OID_AUTO, alq, CTLTYPE_INT|CTLFLAG_RW,
113 0, 0, sysctl_ieee80211_alq_log, "I", "Enable net80211 alq logging");
114 SYSCTL_INT(_net_wlan, OID_AUTO, alq_size, CTLFLAG_RW,
115 &ieee80211_alq_qsize, 0, "In-memory log size (bytes)");
116 SYSCTL_INT(_net_wlan, OID_AUTO, alq_lost, CTLFLAG_RW,
117 &ieee80211_alq_lost, 0, "Debugging operations not logged");
118 SYSCTL_INT(_net_wlan, OID_AUTO, alq_logged, CTLFLAG_RW,
119 &ieee80211_alq_logged, 0, "Debugging operations logged");
122 ieee80211_alq_get(size_t len)
126 ale = alq_getn(ieee80211_alq, len + sizeof(struct ieee80211_alq_rec),
129 ieee80211_alq_lost++;
131 ieee80211_alq_logged++;
136 ieee80211_alq_log(struct ieee80211com *ic, struct ieee80211vap *vap,
137 uint32_t op, uint32_t flags, uint16_t srcid, const uint8_t *src,
141 struct ieee80211_alq_rec *r;
144 /* Don't log if we're disabled */
145 if (ieee80211_alq == NULL)
148 if (len > IEEE80211_ALQ_MAX_PAYLOAD)
151 ale = ieee80211_alq_get(len);
155 r = (struct ieee80211_alq_rec *) ale->ae_data;
156 dst = ((char *) r) + sizeof(struct ieee80211_alq_rec);
157 r->r_timestamp = htobe64(ticks);
159 r->r_wlan = htobe16(vap->iv_ifp->if_dunit);
163 r->r_src = htobe16(srcid);
164 r->r_flags = htobe32(flags);
165 r->r_op = htobe32(op);
166 r->r_len = htobe32(len + sizeof(struct ieee80211_alq_rec));
167 r->r_threadid = htobe32((uint32_t) curthread->td_tid);
170 memcpy(dst, src, len);
172 alq_post(ieee80211_alq, ale);