3 * Bill Paul <wpaul@windriver.com>. All rights reserved.
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.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
32 * $FreeBSD: head/usr.sbin/wpa/wpa_supplicant/Packet32.c 189220 2009-03-01 08:01:38Z sam $
38 * This file implements a small portion of the Winpcap API for the
39 * Windows NDIS interface in wpa_supplicant. It provides just enough
40 * routines to fool wpa_supplicant into thinking it's really running
41 * in a Windows environment.
44 #include <sys/types.h>
45 #include <sys/param.h>
46 #include <sys/socket.h>
47 #include <sys/ioctl.h>
48 #include <sys/socket.h>
49 #include <sys/errno.h>
50 #include <sys/sysctl.h>
51 #include <sys/fcntl.h>
53 #include <net/if_dl.h>
54 #include <net/if_var.h>
56 #include <netinet/in.h>
57 #include <arpa/inet.h>
59 #include <net/route.h>
61 #include <netproto/802_11/ieee80211_ioctl.h>
71 #define OID_802_11_ADD_KEY 0x0d01011D
73 typedef ULONGLONG NDIS_802_11_KEY_RSC;
74 typedef UCHAR NDIS_802_11_MAC_ADDRESS[6];
76 typedef struct NDIS_802_11_KEY {
80 NDIS_802_11_MAC_ADDRESS BSSID;
81 NDIS_802_11_KEY_RSC KeyRSC;
85 typedef struct NDIS_802_11_KEY_COMPAT {
89 NDIS_802_11_MAC_ADDRESS BSSID;
90 UCHAR Pad[6]; /* Make struct layout match Windows. */
91 NDIS_802_11_KEY_RSC KeyRSC;
95 } NDIS_802_11_KEY_COMPAT;
107 PacketGetVersion(void)
109 return("FreeBSD WinPcap compatibility shim v1.0");
113 PacketOpenAdapter(CHAR *iface)
119 struct ieee80211req ireq;
121 s = socket(PF_INET, SOCK_DGRAM, 0);
126 a = malloc(sizeof(struct adapter));
131 if (strncmp(iface, "\\Device\\NPF_", 12) == 0)
133 else if (strncmp(iface, "\\DEVICE\\", 8) == 0)
135 snprintf(a->name, IFNAMSIZ, "%s", iface);
137 /* Turn off net80211 roaming */
138 bzero((char *)&ireq, sizeof(ireq));
139 strncpy(ireq.i_name, iface, sizeof (ifr.ifr_name));
140 ireq.i_type = IEEE80211_IOC_ROAMING;
141 if (ioctl(a->socket, SIOCG80211, &ireq) == 0) {
142 a->prev_roaming = ireq.i_val;
143 ireq.i_val = IEEE80211_ROAMING_MANUAL;
144 if (ioctl(a->socket, SIOCS80211, &ireq) < 0)
146 "Could not set IEEE80211_ROAMING_MANUAL\n");
149 bzero((char *)&ifr, sizeof(ifr));
150 strncpy(ifr.ifr_name, iface, sizeof (ifr.ifr_name));
151 if (ioctl(a->socket, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
156 ifr.ifr_flags |= IFF_UP;
157 if (ioctl(a->socket, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) {
167 PacketRequest(void *iface, BOOLEAN set, PACKET_OID_DATA *oid)
172 NDIS_802_11_KEY *old;
173 NDIS_802_11_KEY_COMPAT *new;
174 PACKET_OID_DATA *o = NULL;
180 bzero((char *)&ifr, sizeof(ifr));
183 * This hack is necessary to work around a difference
184 * betwee the GNU C and Microsoft C compilers. The NDIS_802_11_KEY
185 * structure has a uint64_t in it, right after an array of
186 * chars. The Microsoft compiler inserts padding right before
187 * the 64-bit value to align it on a 64-bit boundary, but
188 * GCC only aligns it on a 32-bit boundary. Trying to pass
189 * the GCC-formatted structure to an NDIS binary driver
190 * fails because some of the fields appear to be at the
193 * To get around this, if we detect someone is trying to do
194 * a set operation on OID_802_11_ADD_KEY, we shuffle the data
195 * into a properly padded structure and pass that into the
196 * driver instead. This allows the driver_ndis.c code supplied
197 * with wpa_supplicant to work unmodified.
200 if (set == TRUE && oid->Oid == OID_802_11_ADD_KEY) {
201 old = (NDIS_802_11_KEY *)&oid->Data;
202 o = malloc(sizeof(PACKET_OID_DATA) +
203 sizeof(NDIS_802_11_KEY_COMPAT) + old->KeyLength);
206 bzero((char *)o, sizeof(PACKET_OID_DATA) +
207 sizeof(NDIS_802_11_KEY_COMPAT) + old->KeyLength);
209 o->Length = sizeof(NDIS_802_11_KEY_COMPAT) + old->KeyLength;
210 new = (NDIS_802_11_KEY_COMPAT *)&o->Data;
211 new->KeyRSC = old->KeyRSC;
212 new->Length = o->Length;
213 new->KeyIndex = old->KeyIndex;
214 new->KeyLength = old->KeyLength;
215 bcopy(old->BSSID, new->BSSID, sizeof(NDIS_802_11_MAC_ADDRESS));
216 bcopy(old->KeyMaterial, (char *)new +
217 sizeof(NDIS_802_11_KEY_COMPAT), new->KeyLength);
218 ifr.ifr_data = (caddr_t)o;
220 ifr.ifr_data = (caddr_t)oid;
222 strlcpy(ifr.ifr_name, a->name, sizeof(ifr.ifr_name));
225 retval = ioctl(a->socket, SIOCSDRVSPEC, &ifr);
227 retval = ioctl(a->socket, SIOCGDRVSPEC, &ifr);
239 PacketGetAdapterNames(CHAR *namelist, ULONG *len)
243 struct if_msghdr *ifm;
244 struct sockaddr_dl *sdl;
245 char *buf, *lim, *next;
258 mib[2] = 0; /* protocol */
259 mib[3] = 0; /* wildcard address family */
260 mib[4] = NET_RT_IFLIST;
261 mib[5] = 0; /* no flags */
263 if (sysctl (mib, 6, NULL, &needed, NULL, 0) < 0)
266 buf = malloc (needed);
270 if (sysctl (mib, 6, buf, &needed, NULL, 0) < 0) {
277 /* Generate interface name list. */
281 ifm = (struct if_msghdr *)next;
282 if (ifm->ifm_type == RTM_IFINFO) {
283 sdl = (struct sockaddr_dl *)(ifm + 1);
284 if (strnstr(sdl->sdl_data, "wlan", sdl->sdl_nlen)) {
285 if ((spc + sdl->sdl_nlen) > *len) {
289 strncpy(plist, sdl->sdl_data, sdl->sdl_nlen);
290 plist += (sdl->sdl_nlen + 1);
291 spc += (sdl->sdl_nlen + 1);
295 next += ifm->ifm_msglen;
299 /* Insert an extra "" as a spacer */
305 * Now generate the interface description list. There
306 * must be a unique description for each interface, and
307 * they have to match what the ndis_events program will
308 * feed in later. To keep this simple, we just repeat
309 * the interface list over again.
314 ifm = (struct if_msghdr *)next;
315 if (ifm->ifm_type == RTM_IFINFO) {
316 sdl = (struct sockaddr_dl *)(ifm + 1);
317 if (strnstr(sdl->sdl_data, "wlan", sdl->sdl_nlen)) {
318 if ((spc + sdl->sdl_nlen) > *len) {
322 strncpy(plist, sdl->sdl_data, sdl->sdl_nlen);
323 plist += (sdl->sdl_nlen + 1);
324 spc += (sdl->sdl_nlen + 1);
328 next += ifm->ifm_msglen;
339 PacketCloseAdapter(void *iface)
343 struct ieee80211req ireq;
350 /* Reset net80211 roaming */
351 bzero((char *)&ireq, sizeof(ireq));
352 strncpy(ireq.i_name, a->name, sizeof (ifr.ifr_name));
353 ireq.i_type = IEEE80211_IOC_ROAMING;
354 ireq.i_val = a->prev_roaming;
355 ioctl(a->socket, SIOCS80211, &ireq);
357 bzero((char *)&ifr, sizeof(ifr));
358 strncpy(ifr.ifr_name, a->name, sizeof (ifr.ifr_name));
359 ioctl(a->socket, SIOCGIFFLAGS, (caddr_t)&ifr);
360 ifr.ifr_flags &= ~IFF_UP;
361 ioctl(a->socket, SIOCSIFFLAGS, (caddr_t)&ifr);
368 #if __FreeBSD_version < 600000
371 * The version of libpcap in FreeBSD 5.2.1 doesn't have these routines.
372 * Call me insane if you will, but I still run 5.2.1 on my laptop, and
373 * I'd like to use WPA there.
377 pcap_get_selectable_fd(pcap_t *p)
379 return(pcap_fileno(p));
383 * The old version of libpcap opens its BPF descriptor in read-only
384 * mode. We need to temporarily create a new one we can write to.
388 pcap_inject(pcap_t *p, const void *buf, size_t len)
392 char device[sizeof "/dev/bpf0000000000"];
396 * Go through all the minors and find one that isn't in use.
399 (void)snprintf(device, sizeof(device), "/dev/bpf%d", n++);
400 fd = open(device, O_RDWR);
401 } while (fd < 0 && errno == EBUSY);
406 bzero((char *)&ifr, sizeof(ifr));
407 ioctl(pcap_fileno(p), BIOCGETIF, (caddr_t)&ifr);
408 ioctl(fd, BIOCSETIF, (caddr_t)&ifr);
410 res = write(fd, buf, len);