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2fc3bb1ea3f4530ede6fdd2fda10848cc2c4d9d7
archived-lcd4linux/plugin_wireless.c
michael 8402d701a9 wifi ioctl() fixed (ticket #144) 
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@978 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
2009-01-23 08:10:04 +00:00

676 lines
16 KiB
C
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/* $Id$
* $URL$
*
* Wireless Extension plugin
*
* Copyright (C) 2004 Xavier Vello <xavier66@free.fr>
* Copyright (C) 2004 Martin Hejl <martin@hejl.de>
* Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
*
* Losts of code borrowed from Wireless Tools, which is
* Copyright (C) 1997-2002 Jean Tourrilhes <jt@hpl.hp.com>
* (avaible at http://web.hpl.hp.com/personal/Jean_Tourrilhes/Linux/)
*
* This file is part of LCD4Linux.
*
* LCD4Linux is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* LCD4Linux is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
* Exported functions:
wifi_level
wifi_noise
wifi_quality
wifi_protocol
wifi_frequency
wifi_bitrate
wifi_essid
wifi_op_mode
wifi_sensitivity
wifi_sec_mode
All Functions take one parameter
(the name of the device, like "wlan0", "ath0" and so on)
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <math.h>
#include <sys/ioctl.h>
#include <net/if_arp.h>
#include <linux/if.h>
#include <linux/wireless.h>
#include "debug.h"
#include "plugin.h"
#include "cfg.h"
#include "hash.h"
#include "qprintf.h"
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif
#define HASH_TTL 100
/*#define KILO 1e3 */
/*#define MEGA 1e6 */
/*#define GIGA 1e9 */
#define KEY_LEVEL "level"
#define KEY_QUALITY "quality"
#define KEY_NOISE "noise"
#define KEY_PROTO "proto"
#define KEY_FREQUENCY "frequency"
#define KEY_BIT_RATE "bit_rate"
#define KEY_ESSID "essid"
#define KEY_OP_MODE "op_mode"
#define KEY_SENS "sens"
#define KEY_SEC_MODE "sec_mode"
#define FREQ2FLOAT(m,e) (((double) m) * pow(10,e))
#define MWATT2DBM(in) ((int) (ceil(10.0 * log10((double) in))))
static HASH wireless;
static int sock = -2;
static char *operation_mode[] = {
"Auto",
"Ad-Hoc",
"Managed",
"Master",
"Repeater",
"Secondary",
"Monitor",
"n/a"
};
static void ioctl_error(const int line)
{
error("IOCTL call to wireless extensions in line %d returned error", line);
}
int do_ioctl(const int sock, /* Socket to the kernel */
const char *ifname, /* Device name */
const int request, /* WE ID */
struct iwreq *pwrq)
{ /* Fixed part of the request */
int ret;
/* Set device name */
strncpy(pwrq->ifr_name, ifname, IFNAMSIZ);
/* Do the request */
ret = ioctl(sock, request, pwrq);
if (ret < 0) {
debug("ioctl(0x%04x) failed: %d '%s'", request, errno, strerror(errno));
}
return ret;
}
int get_range_info(const int sock, const char *ifname, struct iw_range *range)
{
struct iwreq req;
char buffer[sizeof(struct iw_range) * 2]; /* Large enough */
if (sock <= 0) {
return (-1);
}
/* Cleanup */
memset(buffer, 0, sizeof(buffer));
req.u.data.pointer = (caddr_t) buffer;
req.u.data.length = sizeof(buffer);
req.u.data.flags = 0;
if (do_ioctl(sock, ifname, SIOCGIWRANGE, &req) < 0)
return (-1);
/* Copy stuff at the right place, ignore extra */
memcpy((char *) range, buffer, sizeof(struct iw_range));
return (0);
}
static int get_ifname(struct iwreq *preq, const char *dev)
{
/* do not cache this call !!! */
struct iwreq req;
char key_buffer[32];
if (sock <= 0) {
return (-1);
}
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, KEY_PROTO);
if (!preq)
preq = &req;
if (do_ioctl(sock, dev, SIOCGIWNAME, preq)) {
debug("%s isn't a wirelesss interface !", dev);
return -1;
}
hash_put(&wireless, key_buffer, preq->u.name);
return (0);
}
static int get_frequency(const char *dev, const char *key)
{
/* Get frequency / channel */
struct iwreq req;
char qprintf_buffer[1024];
char key_buffer[32];
double freq;
int age;
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, key);
age = hash_age(&wireless, key);
/* reread every HASH_TTL msec only */
if (age > 0 && age <= HASH_TTL) {
return (0);
}
if (get_ifname(&req, dev) != 0) {
return (-1);
}
req.u.data.length = 0;
req.u.data.flags = 1; /* Clear updated flag */
if (do_ioctl(sock, dev, SIOCGIWFREQ, &req) < 0) {
ioctl_error(__LINE__);
return -1;
}
freq = FREQ2FLOAT(req.u.freq.m, req.u.freq.e);
/*if( freq>= GIGA)
snprintf(qprintf_buffer,sizeof(qprintf_buffer), "%g GHz", freq / GIGA);
else
if(freq>= MEGA)
snprintf(qprintf_buffer,sizeof(qprintf_buffer), "%g MHz", freq / MEGA);
else
snprintf(qprintf_buffer,sizeof(qprintf_buffer), "%g kHz", freq / KILO);
*/
snprintf(qprintf_buffer, sizeof(qprintf_buffer), "%g", freq);
hash_put(&wireless, key_buffer, qprintf_buffer);
return (0);
}
static int get_essid(const char *dev, const char *key)
{
/* Get ESSID */
struct iwreq req;
char key_buffer[32];
char essid_buffer[IW_ESSID_MAX_SIZE + 1];
int age;
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, key);
age = hash_age(&wireless, key);
/* reread every HASH_TTL msec only */
if (age > 0 && age <= HASH_TTL) {
return (0);
}
if (get_ifname(&req, dev) != 0) {
return (-1);
}
memset(essid_buffer, 0, sizeof(essid_buffer));
req.u.essid.pointer = (caddr_t) essid_buffer;
req.u.essid.length = IW_ESSID_MAX_SIZE + 1;
req.u.essid.flags = 0;
if (do_ioctl(sock, dev, SIOCGIWESSID, &req) < 0) {
ioctl_error(__LINE__);
return -1;
}
hash_put(&wireless, key_buffer, essid_buffer);
return (0);
}
static int get_op_mode(const char *dev, const char *key)
{
/* Get operation mode */
struct iwreq req;
char key_buffer[32];
int age;
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, key);
age = hash_age(&wireless, key);
/* reread every HASH_TTL msec only */
if (age > 0 && age <= HASH_TTL) {
return (0);
}
if (get_ifname(&req, dev) != 0) {
return (-1);
}
if (do_ioctl(sock, dev, SIOCGIWMODE, &req) < 0) {
ioctl_error(__LINE__);
return -1;
}
/* Fixme: req.u.mode is unsigned and therefore never < 0 */
/* if((req.u.mode > 6) || (req.u.mode < 0)) { */
if (req.u.mode > 6) {
req.u.mode = 7; /* mode not available */
}
hash_put(&wireless, key_buffer, operation_mode[req.u.mode]);
return (0);
}
static int get_bitrate(const char *dev, const char *key)
{
/* Get bit rate */
struct iwreq req;
char key_buffer[32];
char bitrate_buffer[64];
int age;
double bitrate = 0;
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, key);
age = hash_age(&wireless, key);
/* reread every HASH_TTL msec only */
if (age > 0 && age <= HASH_TTL) {
return (0);
}
if (get_ifname(&req, dev) != 0) {
return (-1);
}
if (do_ioctl(sock, dev, SIOCGIWRATE, &req) < 0) {
ioctl_error(__LINE__);
return -1;
}
bitrate_buffer[0] = '\0';
bitrate = (double) (req.u.bitrate.value);
/* if( bitrate>= GIGA)
snprintf(bitrate_buffer,sizeof(bitrate_buffer), "%gGb/s", bitrate / GIGA);
else
if(bitrate >= MEGA)
snprintf(bitrate_buffer,sizeof(bitrate_buffer), "%gMb/s", bitrate / MEGA);
else
snprintf(bitrate_buffer,sizeof(bitrate_buffer), "%gkb/s", bitrate / KILO);
*/
snprintf(bitrate_buffer, sizeof(bitrate_buffer), "%g", bitrate);
hash_put(&wireless, key_buffer, bitrate_buffer);
return (0);
}
static int get_sens(const char *dev, const char *key)
{
/* Get sensitivity */
struct iwreq req;
struct iw_range range;
char key_buffer[32];
char buffer[64];
int age;
int has_sens = 0;
int has_range = 0;
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, key);
age = hash_age(&wireless, key);
/* reread every HASH_TTL msec only */
if (age > 0 && age <= HASH_TTL) {
return (0);
}
if (get_ifname(&req, dev) != 0) {
return (-1);
}
if (do_ioctl(sock, dev, SIOCGIWSENS, &req) >= 0) {
has_sens = 1;
}
if (get_range_info(sock, dev, &range) < 0) {
memset(&range, 0, sizeof(range));
} else {
has_range = 1;
}
if (has_range) {
if (req.u.sens.value < 0) {
qprintf(buffer, sizeof(buffer), "%d dBm", req.u.sens.value);
} else {
qprintf(buffer, sizeof(buffer), "%d/%d", req.u.sens.value, range.sensitivity);
}
} else {
qprintf(buffer, sizeof(buffer), "%d", req.u.sens.value);
}
hash_put(&wireless, key_buffer, buffer);
return (0);
}
static int get_sec_mode(const char *dev, const char *key)
{
/* Get encryption information */
struct iwreq req;
char key_buffer[32];
char encrypt_key[IW_ENCODING_TOKEN_MAX + 1];
int age;
int has_key = 0;
int key_flags = 0;
int key_size = 0;
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, key);
age = hash_age(&wireless, key);
/* reread every HASH_TTL msec only */
if (age > 0 && age <= HASH_TTL) {
return (0);
}
if (get_ifname(&req, dev) != 0) {
return (-1);
}
req.u.data.pointer = (caddr_t) & encrypt_key;
req.u.data.length = IW_ENCODING_TOKEN_MAX;
req.u.data.flags = 0;
if (do_ioctl(sock, dev, SIOCGIWENCODE, &req) >= 0) {
has_key = 1;
key_flags = req.u.data.flags;
key_size = req.u.data.length;
} else {
return (-1);
}
/* Display encryption information */
/*if(has_key && (key_flags & IW_ENCODE_INDEX) > 1) */
/* printf(" [%d]", info->key_flags & IW_ENCODE_INDEX); */
if (has_key && (key_flags & IW_ENCODE_RESTRICTED))
hash_put(&wireless, key_buffer, "restricted");
else if (has_key && (key_flags & IW_ENCODE_OPEN))
hash_put(&wireless, key_buffer, "open");
return (0);
}
static int get_stats(const char *dev, const char *key)
{
struct iw_statistics stats;
struct iwreq req;
char qprintf_buffer[1024];
char key_buffer[32];
int age;
struct iw_range range;
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, key);
age = hash_age(&wireless, key);
/* reread every HASH_TTL msec only */
if (age > 0 && age <= HASH_TTL) {
return (0);
}
if (get_ifname(&req, dev) != 0) {
return (-1);
}
req.u.data.pointer = (caddr_t) & stats;
req.u.data.length = sizeof(stats);
req.u.data.flags = 1; /* Clear updated flag */
if (do_ioctl(sock, dev, SIOCGIWSTATS, &req) < 0) {
ioctl_error(__LINE__);
return -1;
}
if (get_range_info(sock, dev, &range) < 0)
memset(&range, 0, sizeof(range));
if (stats.qual.level > range.max_qual.level) {
qprintf(qprintf_buffer, sizeof(qprintf_buffer), "%d", stats.qual.level - 0x100);
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, KEY_LEVEL);
hash_put(&wireless, key_buffer, qprintf_buffer);
qprintf(qprintf_buffer, sizeof(qprintf_buffer), "%d", stats.qual.noise - 0x100);
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, KEY_NOISE);
hash_put(&wireless, key_buffer, qprintf_buffer);
qprintf(qprintf_buffer, sizeof(qprintf_buffer), "%d/%d", stats.qual.qual, range.max_qual.qual);
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, KEY_QUALITY);
hash_put(&wireless, key_buffer, qprintf_buffer);
} else {
qprintf(qprintf_buffer, sizeof(qprintf_buffer), "%d/%d", stats.qual.level, range.max_qual.level);
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, KEY_LEVEL);;
hash_put(&wireless, key_buffer, qprintf_buffer);
qprintf(qprintf_buffer, sizeof(qprintf_buffer), "%d/%d", stats.qual.noise, range.max_qual.noise);
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, KEY_NOISE);
hash_put(&wireless, key_buffer, qprintf_buffer);
qprintf(qprintf_buffer, sizeof(qprintf_buffer), "%d/%d", stats.qual.qual, range.max_qual.qual);
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, KEY_QUALITY);
hash_put(&wireless, key_buffer, qprintf_buffer);
}
return 0;
}
static int check_socket()
{
/* already handled in a previous run */
if (sock == -3)
return (-1);
/* socket not initialized */
if (sock == -2)
sock = socket(AF_INET, SOCK_DGRAM, 0);
/* error initilalizing socket */
if (sock <= 0) {
error("Error opening socket for reading wireless stats");
sock = -3;
return (-1);
}
return (0);
}
static void save_result(RESULT * result, const char *dev, const char *key, const int res)
{
char key_buffer[64];
char *val = NULL;
qprintf(key_buffer, sizeof(key_buffer), "%s.%s", dev, key);
if (res < 0) {
SetResult(&result, R_STRING, "");
return;
}
val = hash_get(&wireless, key_buffer, NULL);
if (val) {
SetResult(&result, R_STRING, val);
} else {
SetResult(&result, R_STRING, "");
}
}
/*
*functions exported to the evaluator
*/
static void wireless_quality(RESULT * result, RESULT * arg1)
{
char *dev = R2S(arg1);
if (check_socket() != 0)
return;
save_result(result, dev, KEY_QUALITY, get_stats(dev, KEY_QUALITY));
}
static void wireless_level(RESULT * result, RESULT * arg1)
{
char *dev = R2S(arg1);
if (check_socket() != 0)
return;
save_result(result, dev, KEY_LEVEL, get_stats(dev, KEY_LEVEL));
}
static void wireless_noise(RESULT * result, RESULT * arg1)
{
char *dev = R2S(arg1);
if (check_socket() != 0)
return;
save_result(result, dev, KEY_NOISE, get_stats(dev, KEY_NOISE));
}
static void wireless_protocol(RESULT * result, RESULT * arg1)
{
char *dev = R2S(arg1);
if (check_socket() != 0)
return;
save_result(result, dev, KEY_PROTO, get_ifname(NULL, dev));
}
static void wireless_frequency(RESULT * result, RESULT * arg1)
{
char *dev = R2S(arg1);
if (check_socket() != 0)
return;
save_result(result, dev, KEY_FREQUENCY, get_frequency(dev, KEY_FREQUENCY));
}
static void wireless_bitrate(RESULT * result, RESULT * arg1)
{
char *dev = R2S(arg1);
if (check_socket() != 0)
return;
save_result(result, dev, KEY_BIT_RATE, get_bitrate(dev, KEY_BIT_RATE));
}
static void wireless_essid(RESULT * result, RESULT * arg1)
{
char *dev = R2S(arg1);
if (check_socket() != 0)
return;
save_result(result, dev, KEY_ESSID, get_essid(dev, KEY_ESSID));
}
static void wireless_op_mode(RESULT * result, RESULT * arg1)
{
char *dev = R2S(arg1);
if (check_socket() != 0)
return;
save_result(result, dev, KEY_OP_MODE, get_op_mode(dev, KEY_OP_MODE));
}
static void wireless_sensitivity(RESULT * result, RESULT * arg1)
{
char *dev = R2S(arg1);
if (check_socket() != 0)
return;
save_result(result, dev, KEY_SENS, get_sens(dev, KEY_SENS));
}
static void wireless_sec_mode(RESULT * result, RESULT * arg1)
{
char *dev = R2S(arg1);
if (check_socket() != 0)
return;
save_result(result, dev, KEY_SEC_MODE, get_sec_mode(dev, KEY_SEC_MODE));
}
/*
init and cleanup
*/
int plugin_init_wireless(void)
{
hash_create(&wireless);
AddFunction("wifi::level", 1, wireless_level);
AddFunction("wifi::noise", 1, wireless_noise);
AddFunction("wifi::quality", 1, wireless_quality);
AddFunction("wifi::protocol", 1, wireless_protocol);
AddFunction("wifi::frequency", 1, wireless_frequency);
AddFunction("wifi::bitrate", 1, wireless_bitrate);
AddFunction("wifi::essid", 1, wireless_essid);
AddFunction("wifi::op_mode", 1, wireless_op_mode);
AddFunction("wifi::sensitivity", 1, wireless_sensitivity);
AddFunction("wifi::sec_mode", 1, wireless_sec_mode);
return 0;
}
void plugin_exit_wireless(void)
{
if (sock > 0)
close(sock);
hash_destroy(&wireless);
}
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