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/*-
* 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("$FreeBSD$");
/*
* This program simulates the behavior of the ndis_events utility
* supplied with wpa_supplicant for Windows. The original utility
* is designed to translate Windows WMI events. We don't have WMI,
* but we need to supply certain event info to wpa_supplicant in
* order to make WPA2 work correctly, so we fake up the interface.
*/
#include <sys/types.h>
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/sysctl.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 <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <err.h>
#include <syslog.h>
#include <stdarg.h>
static int verbose = 0;
static int debug = 0;
static int all_events = 0;
#define PROGNAME "ndis_events"
#define WPA_SUPPLICANT_PORT 9876
#define NDIS_INDICATION_LEN 2048
#define EVENT_CONNECT 0
#define EVENT_DISCONNECT 1
#define EVENT_MEDIA_SPECIFIC 2
#define NDIS_STATUS_MEDIA_CONNECT 0x4001000B
#define NDIS_STATUS_MEDIA_DISCONNECT 0x4001000C
#define NDIS_STATUS_MEDIA_SPECIFIC_INDICATION 0x40010012
struct ndis_evt {
uint32_t ne_sts;
uint32_t ne_len;
#ifdef notdef
char ne_buf[1];
#endif
};
static int find_ifname(int, char *);
static int announce_event(char *, int, struct sockaddr_in *);
static void usage(char *);
static void
dbgmsg(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (debug)
vwarnx(fmt, ap);
else
vsyslog(LOG_ERR, fmt, ap);
va_end(ap);
return;
}
static int
find_ifname(idx, name)
int idx;
char *name;
{
int mib[6];
size_t needed;
struct if_msghdr *ifm;
struct sockaddr_dl *sdl;
char *buf, *lim, *next;
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(EIO);
buf = malloc (needed);
if (buf == NULL)
return(ENOMEM);
if (sysctl (mib, 6, buf, &needed, NULL, 0) < 0) {
free(buf);
return(EIO);
}
lim = buf + needed;
next = buf;
while (next < lim) {
ifm = (struct if_msghdr *)next;
if (ifm->ifm_type == RTM_IFINFO) {
sdl = (struct sockaddr_dl *)(ifm + 1);
if (ifm->ifm_index == idx) {
strncpy(name, sdl->sdl_data, sdl->sdl_nlen);
name[sdl->sdl_nlen] = '\0';
free (buf);
return (0);
}
}
next += ifm->ifm_msglen;
}
free (buf);
return(ENOENT);
}
static int
announce_event(ifname, sock, dst)
char *ifname;
int sock;
struct sockaddr_in *dst;
{
int s;
char indication[NDIS_INDICATION_LEN];
struct ifreq ifr;
struct ndis_evt *e;
char buf[512], *pos, *end;
int len, type, _type;
s = socket(PF_INET, SOCK_DGRAM, 0);
if (s < 0) {
dbgmsg("socket creation failed");
return(EINVAL);
}
bzero((char *)&ifr, sizeof(ifr));
e = (struct ndis_evt *)indication;
e->ne_len = NDIS_INDICATION_LEN - sizeof(struct ndis_evt);
strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
ifr.ifr_data = indication;
if (ioctl(s, SIOCGPRIVATE_0, &ifr) < 0) {
close(s);
if (verbose) {
if (errno == ENOENT)
dbgmsg("drained all events from %s",
ifname, errno);
else
dbgmsg("failed to read event info from %s: %d",
ifname, errno);
}
return(ENOENT);
}
if (e->ne_sts == NDIS_STATUS_MEDIA_CONNECT) {
type = EVENT_CONNECT;
if (verbose)
dbgmsg("Received a connect event for %s", ifname);
if (!all_events) {
close(s);
return(0);
}
}
if (e->ne_sts == NDIS_STATUS_MEDIA_DISCONNECT) {
type = EVENT_DISCONNECT;
if (verbose)
dbgmsg("Received a disconnect event for %s", ifname);
if (!all_events) {
close(s);
return(0);
}
}
if (e->ne_sts == NDIS_STATUS_MEDIA_SPECIFIC_INDICATION) {
type = EVENT_MEDIA_SPECIFIC;
if (verbose)
dbgmsg("Received a media-specific event for %s",
ifname);
}
end = buf + sizeof(buf);
_type = (int) type;
memcpy(buf, &_type, sizeof(_type));
pos = buf + sizeof(_type);
len = snprintf(pos + 1, end - pos - 1, "%s", ifname);
if (len < 0) {
close(s);
return(ENOSPC);
}
if (len > 255)
len = 255;
*pos = (unsigned char) len;
pos += 1 + len;
if (e->ne_len) {
if (e->ne_len > 255 || 1 + e->ne_len > end - pos) {
dbgmsg("Not enough room for send_event data (%d)\n",
e->ne_len);
close(s);
return(ENOSPC);
}
*pos++ = (unsigned char) e->ne_len;
memcpy(pos, (indication) + sizeof(struct ndis_evt), e->ne_len);
pos += e->ne_len;
}
len = sendto(sock, buf, pos - buf, 0, (struct sockaddr *) dst,
sizeof(struct sockaddr_in));
close(s);
return(0);
}
static void
usage(progname)
char *progname;
{
fprintf(stderr, "Usage: ndis_events [-a] [-d] [-v]\n", progname);
exit(1);
}
int
main(argc, argv)
int argc;
char *argv[];
{
int s, r, n;
struct sockaddr_in sin;
char msg[NDIS_INDICATION_LEN];
struct rt_msghdr *rtm;
struct if_msghdr *ifm;
char ifname[IFNAMSIZ];
int ch;
while ((ch = getopt(argc, argv, "dva")) != -1) {
switch(ch) {
case 'd':
debug++;
break;
case 'v':
verbose++;
break;
case 'a':
all_events++;
break;
default:
usage(PROGNAME);
break;
}
}
if (!debug && daemon(0, 0))
err(1, "failed to daemonize ourselves");
if (!debug)
openlog(PROGNAME, LOG_PID | LOG_CONS, LOG_DAEMON);
bzero((char *)&sin, sizeof(sin));
/* Create a datagram socket. */
s = socket(PF_INET, SOCK_DGRAM, 0);
if (s < 0) {
dbgmsg("socket creation failed");
exit(1);
}
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = inet_addr("127.0.0.1");
sin.sin_port = htons(WPA_SUPPLICANT_PORT);
/* Create a routing socket. */
r = socket (PF_ROUTE, SOCK_RAW, 0);
if (r < 0) {
dbgmsg("routing socket creation failed");
exit(1);
}
/* Now sit and spin, waiting for events. */
if (verbose)
dbgmsg("Listening for events");
while (1) {
n = read(r, msg, NDIS_INDICATION_LEN);
rtm = (struct rt_msghdr *)msg;
if (rtm->rtm_type != RTM_IFINFO)
continue;
ifm = (struct if_msghdr *)msg;
if (find_ifname(ifm->ifm_index, ifname))
continue;
if (strstr(ifname, "ndis")) {
while(announce_event(ifname, s, &sin) == 0)
;
} else {
if (verbose)
dbgmsg("Skipping ifinfo message from %s",
ifname);
}
}
/* NOTREACHED */
exit(0);
}
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