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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/usr.sbin/wpa/wpa_supplicant/Packet32.c |
/*-
* Copyright (c) 2005
* Bill Paul <wpaul@windriver.com>. 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``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 Bill Paul OR THE VOICES IN HIS HEAD
* 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>
__FBSDID("$FreeBSD: release/9.1.0/usr.sbin/wpa/wpa_supplicant/Packet32.c 223492 2011-06-24 07:05:20Z kevlo $");
/*
* This file implements a small portion of the Winpcap API for the
* Windows NDIS interface in wpa_supplicant. It provides just enough
* routines to fool wpa_supplicant into thinking it's really running
* in a Windows environment.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/sysctl.h>
#include <sys/fcntl.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_var.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <net/route.h>
#include <net80211/ieee80211_ioctl.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <pcap.h>
#include "Packet32.h"
#define OID_802_11_ADD_KEY 0x0d01011D
typedef ULONGLONG NDIS_802_11_KEY_RSC;
typedef UCHAR NDIS_802_11_MAC_ADDRESS[6];
typedef struct NDIS_802_11_KEY {
ULONG Length;
ULONG KeyIndex;
ULONG KeyLength;
NDIS_802_11_MAC_ADDRESS BSSID;
NDIS_802_11_KEY_RSC KeyRSC;
UCHAR KeyMaterial[1];
} NDIS_802_11_KEY;
typedef struct NDIS_802_11_KEY_COMPAT {
ULONG Length;
ULONG KeyIndex;
ULONG KeyLength;
NDIS_802_11_MAC_ADDRESS BSSID;
UCHAR Pad[6]; /* Make struct layout match Windows. */
NDIS_802_11_KEY_RSC KeyRSC;
#ifdef notdef
UCHAR KeyMaterial[1];
#endif
} NDIS_802_11_KEY_COMPAT;
#define TRUE 1
#define FALSE 0
struct adapter {
int socket;
char name[IFNAMSIZ];
int prev_roaming;
};
PCHAR
PacketGetVersion(void)
{
return("FreeBSD WinPcap compatibility shim v1.0");
}
void *
PacketOpenAdapter(CHAR *iface)
{
struct adapter *a;
int s;
int ifflags;
struct ifreq ifr;
struct ieee80211req ireq;
s = socket(PF_INET, SOCK_DGRAM, 0);
if (s == -1)
return(NULL);
a = malloc(sizeof(struct adapter));
if (a == NULL)
return(NULL);
a->socket = s;
if (strncmp(iface, "\\Device\\NPF_", 12) == 0)
iface += 12;
else if (strncmp(iface, "\\DEVICE\\", 8) == 0)
iface += 8;
snprintf(a->name, IFNAMSIZ, "%s", iface);
/* Turn off net80211 roaming */
bzero((char *)&ireq, sizeof(ireq));
strncpy(ireq.i_name, iface, sizeof (ifr.ifr_name));
ireq.i_type = IEEE80211_IOC_ROAMING;
if (ioctl(a->socket, SIOCG80211, &ireq) == 0) {
a->prev_roaming = ireq.i_val;
ireq.i_val = IEEE80211_ROAMING_MANUAL;
if (ioctl(a->socket, SIOCS80211, &ireq) < 0)
fprintf(stderr,
"Could not set IEEE80211_ROAMING_MANUAL\n");
}
bzero((char *)&ifr, sizeof(ifr));
strncpy(ifr.ifr_name, iface, sizeof (ifr.ifr_name));
if (ioctl(a->socket, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
free(a);
close(s);
return(NULL);
}
ifr.ifr_flags |= IFF_UP;
if (ioctl(a->socket, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) {
free(a);
close(s);
return(NULL);
}
return(a);
}
int
PacketRequest(void *iface, BOOLEAN set, PACKET_OID_DATA *oid)
{
struct adapter *a;
uint32_t retval;
struct ifreq ifr;
NDIS_802_11_KEY *old;
NDIS_802_11_KEY_COMPAT *new;
PACKET_OID_DATA *o = NULL;
if (iface == NULL)
return(-1);
a = iface;
bzero((char *)&ifr, sizeof(ifr));
/*
* This hack is necessary to work around a difference
* betwee the GNU C and Microsoft C compilers. The NDIS_802_11_KEY
* structure has a uint64_t in it, right after an array of
* chars. The Microsoft compiler inserts padding right before
* the 64-bit value to align it on a 64-bit boundary, but
* GCC only aligns it on a 32-bit boundary. Trying to pass
* the GCC-formatted structure to an NDIS binary driver
* fails because some of the fields appear to be at the
* wrong offsets.
*
* To get around this, if we detect someone is trying to do
* a set operation on OID_802_11_ADD_KEY, we shuffle the data
* into a properly padded structure and pass that into the
* driver instead. This allows the driver_ndis.c code supplied
* with wpa_supplicant to work unmodified.
*/
if (set == TRUE && oid->Oid == OID_802_11_ADD_KEY) {
old = (NDIS_802_11_KEY *)&oid->Data;
o = malloc(sizeof(PACKET_OID_DATA) +
sizeof(NDIS_802_11_KEY_COMPAT) + old->KeyLength);
if (o == NULL)
return(0);
bzero((char *)o, sizeof(PACKET_OID_DATA) +
sizeof(NDIS_802_11_KEY_COMPAT) + old->KeyLength);
o->Oid = oid->Oid;
o->Length = sizeof(NDIS_802_11_KEY_COMPAT) + old->KeyLength;
new = (NDIS_802_11_KEY_COMPAT *)&o->Data;
new->KeyRSC = old->KeyRSC;
new->Length = o->Length;
new->KeyIndex = old->KeyIndex;
new->KeyLength = old->KeyLength;
bcopy(old->BSSID, new->BSSID, sizeof(NDIS_802_11_MAC_ADDRESS));
bcopy(old->KeyMaterial, (char *)new +
sizeof(NDIS_802_11_KEY_COMPAT), new->KeyLength);
ifr.ifr_data = (caddr_t)o;
} else
ifr.ifr_data = (caddr_t)oid;
strlcpy(ifr.ifr_name, a->name, sizeof(ifr.ifr_name));
if (set == TRUE)
retval = ioctl(a->socket, SIOCSDRVSPEC, &ifr);
else
retval = ioctl(a->socket, SIOCGDRVSPEC, &ifr);
if (o != NULL)
free(o);
if (retval)
return(0);
return(1);
}
int
PacketGetAdapterNames(CHAR *namelist, ULONG *len)
{
int mib[6];
size_t needed;
struct if_msghdr *ifm;
struct sockaddr_dl *sdl;
char *buf, *lim, *next;
char *plist;
int spc;
int i, ifcnt = 0;
plist = namelist;
spc = 0;
bzero(plist, *len);
needed = 0;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0; /* protocol */
mib[3] = 0; /* wildcard address family */
mib[4] = NET_RT_IFLIST;
mib[5] = 0; /* no flags */
if (sysctl (mib, 6, NULL, &needed, NULL, 0) < 0)
return(FALSE);
buf = malloc (needed);
if (buf == NULL)
return(FALSE);
if (sysctl (mib, 6, buf, &needed, NULL, 0) < 0) {
free(buf);
return(FALSE);
}
lim = buf + needed;
/* Generate interface name list. */
next = buf;
while (next < lim) {
ifm = (struct if_msghdr *)next;
if (ifm->ifm_type == RTM_IFINFO) {
sdl = (struct sockaddr_dl *)(ifm + 1);
if (strnstr(sdl->sdl_data, "wlan", sdl->sdl_nlen)) {
if ((spc + sdl->sdl_nlen) > *len) {
free(buf);
return(FALSE);
}
strncpy(plist, sdl->sdl_data, sdl->sdl_nlen);
plist += (sdl->sdl_nlen + 1);
spc += (sdl->sdl_nlen + 1);
ifcnt++;
}
}
next += ifm->ifm_msglen;
}
/* Insert an extra "" as a spacer */
plist++;
spc++;
/*
* Now generate the interface description list. There
* must be a unique description for each interface, and
* they have to match what the ndis_events program will
* feed in later. To keep this simple, we just repeat
* the interface list over again.
*/
next = buf;
while (next < lim) {
ifm = (struct if_msghdr *)next;
if (ifm->ifm_type == RTM_IFINFO) {
sdl = (struct sockaddr_dl *)(ifm + 1);
if (strnstr(sdl->sdl_data, "wlan", sdl->sdl_nlen)) {
if ((spc + sdl->sdl_nlen) > *len) {
free(buf);
return(FALSE);
}
strncpy(plist, sdl->sdl_data, sdl->sdl_nlen);
plist += (sdl->sdl_nlen + 1);
spc += (sdl->sdl_nlen + 1);
ifcnt++;
}
}
next += ifm->ifm_msglen;
}
free (buf);
*len = spc + 1;
return(TRUE);
}
void
PacketCloseAdapter(void *iface)
{
struct adapter *a;
struct ifreq ifr;
struct ieee80211req ireq;
if (iface == NULL)
return;
a = iface;
/* Reset net80211 roaming */
bzero((char *)&ireq, sizeof(ireq));
strncpy(ireq.i_name, a->name, sizeof (ifr.ifr_name));
ireq.i_type = IEEE80211_IOC_ROAMING;
ireq.i_val = a->prev_roaming;
ioctl(a->socket, SIOCS80211, &ireq);
bzero((char *)&ifr, sizeof(ifr));
strncpy(ifr.ifr_name, a->name, sizeof (ifr.ifr_name));
ioctl(a->socket, SIOCGIFFLAGS, (caddr_t)&ifr);
ifr.ifr_flags &= ~IFF_UP;
ioctl(a->socket, SIOCSIFFLAGS, (caddr_t)&ifr);
close(a->socket);
free(a);
return;
}
#if __FreeBSD_version < 600000
/*
* The version of libpcap in FreeBSD 5.2.1 doesn't have these routines.
* Call me insane if you will, but I still run 5.2.1 on my laptop, and
* I'd like to use WPA there.
*/
int
pcap_get_selectable_fd(pcap_t *p)
{
return(pcap_fileno(p));
}
/*
* The old version of libpcap opens its BPF descriptor in read-only
* mode. We need to temporarily create a new one we can write to.
*/
int
pcap_inject(pcap_t *p, const void *buf, size_t len)
{
int fd;
int res, n = 0;
char device[sizeof "/dev/bpf0000000000"];
struct ifreq ifr;
/*
* Go through all the minors and find one that isn't in use.
*/
do {
(void)snprintf(device, sizeof(device), "/dev/bpf%d", n++);
fd = open(device, O_RDWR);
} while (fd < 0 && errno == EBUSY);
if (fd == -1)
return(-1);
bzero((char *)&ifr, sizeof(ifr));
ioctl(pcap_fileno(p), BIOCGETIF, (caddr_t)&ifr);
ioctl(fd, BIOCSETIF, (caddr_t)&ifr);
res = write(fd, buf, len);
close(fd);
return(res);
}
#endif