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lib/libiw: add libiw from wireless tools v29, and wrapper to scan wlan networks

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Origin commit data
------------------
Branch: ni/coolstream
Commit: 9a40a9f740
Author: [CST] Focus <focus.cst@gmail.com>
Date: 2013-11-01 (Fri, 01 Nov 2013)


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This commit was generated by Migit
This commit is contained in:
[CST] Focus
2013-11-01 16:33:21 +04:00
parent f96beaeb2f
commit a3855afdf8
6 changed files with 5270 additions and 0 deletions
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6
lib/libiw/Makefile.am Normal file
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noinst_LIBRARIES = libiw.a
AM_CXXFLAGS = -I$(top_builddir) -fno-rtti -fno-exceptions
libiw_a_SOURCES = iwlib.c iwscan.cpp

3214
lib/libiw/iwlib.c Normal file
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lib/libiw/iwlib.h Normal file
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/*
* Wireless Tools
*
* Jean II - HPLB 97->99 - HPL 99->07
*
* Common header for the Wireless Extension library...
*
* This file is released under the GPL license.
* Copyright (c) 1997-2007 Jean Tourrilhes <jt@hpl.hp.com>
*/
#ifndef IWLIB_H
#define IWLIB_H
/*#include "CHANGELOG.h"*/
/***************************** INCLUDES *****************************/
/* Standard headers */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <math.h>
#include <errno.h>
#include <fcntl.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h> /* gethostbyname, getnetbyname */
#include <net/ethernet.h> /* struct ether_addr */
#include <sys/time.h> /* struct timeval */
#include <unistd.h>
/* This is our header selection. Try to hide the mess and the misery :-(
* Don't look, you would go blind ;-)
* Note : compatibility with *old* distributions has been removed,
* you will need Glibc 2.2 and older to compile (which means
* Mandrake 8.0, Debian 2.3, RH 7.1 or older).
*/
/* Set of headers proposed by Dr. Michael Rietz <rietz@mail.amps.de>, 27.3.2 */
#include <net/if_arp.h> /* For ARPHRD_ETHER */
#include <sys/socket.h> /* For AF_INET & struct sockaddr */
#include <netinet/in.h> /* For struct sockaddr_in */
#include <netinet/if_ether.h>
/* Fixup to be able to include kernel includes in userspace.
* Basically, kill the sparse annotations... Jean II */
#ifndef __user
#define __user
#endif
#include <linux/types.h> /* for "caddr_t" et al */
/* Glibc systems headers are supposedly less problematic than kernel ones */
#include <sys/socket.h> /* for "struct sockaddr" et al */
#include <net/if.h> /* for IFNAMSIZ and co... */
/* Private copy of Wireless extensions (in this directoty) */
#include "wireless.h"
/* Make gcc understant that when we say inline, we mean it.
* I really hate when the compiler is trying to be more clever than me,
* because in this case gcc is not able to figure out functions with a
* single call site, so not only I have to tag those functions inline
* by hand, but then it refuse to inline them properly.
* Total saving for iwevent : 150B = 0.7%.
* Fortunately, in gcc 3.4, they now automatically inline static functions
* with a single call site. Hurrah !
* Jean II */
#undef IW_GCC_HAS_BROKEN_INLINE
#if __GNUC__ == 3
#if __GNUC_MINOR__ >= 1 && __GNUC_MINOR__ < 4
#define IW_GCC_HAS_BROKEN_INLINE 1
#endif /* __GNUC_MINOR__ */
#endif /* __GNUC__ */
/* However, gcc 4.0 has introduce a new "feature", when compiling with
* '-Os', it does not want to inline iw_ether_cmp() and friends.
* So, we need to fix inline again !
* Jean II */
#if __GNUC__ == 4
#define IW_GCC_HAS_BROKEN_INLINE 1
#endif /* __GNUC__ */
/* Now, really fix the inline */
#ifdef IW_GCC_HAS_BROKEN_INLINE
#ifdef inline
#undef inline
#endif /* inline */
#define inline inline __attribute__((always_inline))
#endif /* IW_GCC_HAS_BROKEN_INLINE */
#ifdef __cplusplus
extern "C" {
#endif
/****************************** DEBUG ******************************/
//#define DEBUG 1
/************************ CONSTANTS & MACROS ************************/
/* Various versions information */
/* Recommended Wireless Extension version */
#define WE_VERSION 21
/* Maximum forward compatibility built in this version of WT */
#define WE_MAX_VERSION 22
/* Version of Wireless Tools */
#define WT_VERSION 29
/* Paths */
#define PROC_NET_WIRELESS "/proc/net/wireless"
#define PROC_NET_DEV "/proc/net/dev"
/* Some usefull constants */
#define KILO 1e3
#define MEGA 1e6
#define GIGA 1e9
/* For doing log10/exp10 without libm */
#define LOG10_MAGIC 1.25892541179
/* Backward compatibility for network headers */
#ifndef ARPHRD_IEEE80211
#define ARPHRD_IEEE80211 801 /* IEEE 802.11 */
#endif /* ARPHRD_IEEE80211 */
#ifndef IW_EV_LCP_PK_LEN
/* Size of the Event prefix when packed in stream */
#define IW_EV_LCP_PK_LEN (4)
/* Size of the various events when packed in stream */
#define IW_EV_CHAR_PK_LEN (IW_EV_LCP_PK_LEN + IFNAMSIZ)
#define IW_EV_UINT_PK_LEN (IW_EV_LCP_PK_LEN + sizeof(__u32))
#define IW_EV_FREQ_PK_LEN (IW_EV_LCP_PK_LEN + sizeof(struct iw_freq))
#define IW_EV_PARAM_PK_LEN (IW_EV_LCP_PK_LEN + sizeof(struct iw_param))
#define IW_EV_ADDR_PK_LEN (IW_EV_LCP_PK_LEN + sizeof(struct sockaddr))
#define IW_EV_QUAL_PK_LEN (IW_EV_LCP_PK_LEN + sizeof(struct iw_quality))
#define IW_EV_POINT_PK_LEN (IW_EV_LCP_PK_LEN + 4)
struct iw_pk_event
{
__u16 len; /* Real lenght of this stuff */
__u16 cmd; /* Wireless IOCTL */
union iwreq_data u; /* IOCTL fixed payload */
} __attribute__ ((packed));
struct iw_pk_point
{
void __user *pointer; /* Pointer to the data (in user space) */
__u16 length; /* number of fields or size in bytes */
__u16 flags; /* Optional params */
} __attribute__ ((packed));
#define IW_EV_LCP_PK2_LEN (sizeof(struct iw_pk_event) - sizeof(union iwreq_data))
#define IW_EV_POINT_PK2_LEN (IW_EV_LCP_PK2_LEN + sizeof(struct iw_pk_point) - IW_EV_POINT_OFF)
#endif /* IW_EV_LCP_PK_LEN */
/****************************** TYPES ******************************/
/* Shortcuts */
typedef struct iw_statistics iwstats;
typedef struct iw_range iwrange;
typedef struct iw_param iwparam;
typedef struct iw_freq iwfreq;
typedef struct iw_quality iwqual;
typedef struct iw_priv_args iwprivargs;
typedef struct sockaddr sockaddr;
/* Structure for storing all wireless information for each device
* This is a cut down version of the one above, containing only
* the things *truly* needed to configure a card.
* Don't add other junk, I'll remove it... */
typedef struct wireless_config
{
char name[IFNAMSIZ + 1]; /* Wireless/protocol name */
int has_nwid;
iwparam nwid; /* Network ID */
int has_freq;
double freq; /* Frequency/channel */
int freq_flags;
int has_key;
unsigned char key[IW_ENCODING_TOKEN_MAX]; /* Encoding key used */
int key_size; /* Number of bytes */
int key_flags; /* Various flags */
int has_essid;
int essid_on;
char essid[IW_ESSID_MAX_SIZE + 1]; /* ESSID (extended network) */
int has_mode;
int mode; /* Operation mode */
} wireless_config;
/* Structure for storing all wireless information for each device
* This is pretty exhaustive... */
typedef struct wireless_info
{
struct wireless_config b; /* Basic information */
int has_sens;
iwparam sens; /* sensitivity */
int has_nickname;
char nickname[IW_ESSID_MAX_SIZE + 1]; /* NickName */
int has_ap_addr;
sockaddr ap_addr; /* Access point address */
int has_bitrate;
iwparam bitrate; /* Bit rate in bps */
int has_rts;
iwparam rts; /* RTS threshold in bytes */
int has_frag;
iwparam frag; /* Fragmentation threshold in bytes */
int has_power;
iwparam power; /* Power management parameters */
int has_txpower;
iwparam txpower; /* Transmit Power in dBm */
int has_retry;
iwparam retry; /* Retry limit or lifetime */
/* Stats */
iwstats stats;
int has_stats;
iwrange range;
int has_range;
/* Auth params for WPA/802.1x/802.11i */
int auth_key_mgmt;
int has_auth_key_mgmt;
int auth_cipher_pairwise;
int has_auth_cipher_pairwise;
int auth_cipher_group;
int has_auth_cipher_group;
} wireless_info;
/* Structure for storing an entry of a wireless scan.
* This is only a subset of all possible information, the flexible
* structure of scan results make it impossible to capture all
* information in such a static structure. */
typedef struct wireless_scan
{
/* Linked list */
struct wireless_scan * next;
/* Cell identifiaction */
int has_ap_addr;
sockaddr ap_addr; /* Access point address */
/* Other information */
struct wireless_config b; /* Basic information */
iwstats stats; /* Signal strength */
int has_stats;
iwparam maxbitrate; /* Max bit rate in bps */
int has_maxbitrate;
} wireless_scan;
/*
* Context used for non-blocking scan.
*/
typedef struct wireless_scan_head
{
wireless_scan * result; /* Result of the scan */
int retry; /* Retry level */
} wireless_scan_head;
/* Structure used for parsing event streams, such as Wireless Events
* and scan results */
typedef struct stream_descr
{
char * end; /* End of the stream */
char * current; /* Current event in stream of events */
char * value; /* Current value in event */
} stream_descr;
/* Prototype for handling display of each single interface on the
* system - see iw_enum_devices() */
typedef int (*iw_enum_handler)(int skfd,
char * ifname,
char * args[],
int count);
/* Describe a modulation */
typedef struct iw_modul_descr
{
unsigned int mask; /* Modulation bitmask */
char cmd[8]; /* Short name */
char * verbose; /* Verbose description */
} iw_modul_descr;
/**************************** PROTOTYPES ****************************/
/*
* All the functions in iwcommon.c
*/
/* ---------------------- SOCKET SUBROUTINES -----------------------*/
int
iw_sockets_open(void);
void
iw_enum_devices(int skfd,
iw_enum_handler fn,
char * args[],
int count);
/* --------------------- WIRELESS SUBROUTINES ----------------------*/
int
iw_get_kernel_we_version(void);
int
iw_print_version_info(const char * toolname);
int
iw_get_range_info(int skfd,
const char * ifname,
iwrange * range);
int
iw_get_priv_info(int skfd,
const char * ifname,
iwprivargs ** ppriv);
int
iw_get_basic_config(int skfd,
const char * ifname,
wireless_config * info);
int
iw_set_basic_config(int skfd,
const char * ifname,
wireless_config * info);
/* --------------------- PROTOCOL SUBROUTINES --------------------- */
int
iw_protocol_compare(const char * protocol1,
const char * protocol2);
/* -------------------- FREQUENCY SUBROUTINES --------------------- */
void
iw_float2freq(double in,
iwfreq * out);
double
iw_freq2float(const iwfreq * in);
void
iw_print_freq_value(char * buffer,
int buflen,
double freq);
void
iw_print_freq(char * buffer,
int buflen,
double freq,
int channel,
int freq_flags);
int
iw_freq_to_channel(double freq,
const struct iw_range * range);
int
iw_channel_to_freq(int channel,
double * pfreq,
const struct iw_range * range);
void
iw_print_bitrate(char * buffer,
int buflen,
int bitrate);
/* ---------------------- POWER SUBROUTINES ----------------------- */
int
iw_dbm2mwatt(int in);
int
iw_mwatt2dbm(int in);
void
iw_print_txpower(char * buffer,
int buflen,
struct iw_param * txpower);
/* -------------------- STATISTICS SUBROUTINES -------------------- */
int
iw_get_stats(int skfd,
const char * ifname,
iwstats * stats,
const iwrange * range,
int has_range);
void
iw_print_stats(char * buffer,
int buflen,
const iwqual * qual,
const iwrange * range,
int has_range);
/* --------------------- ENCODING SUBROUTINES --------------------- */
void
iw_print_key(char * buffer,
int buflen,
const unsigned char * key,
int key_size,
int key_flags);
int
iw_in_key(const char * input,
unsigned char * key);
int
iw_in_key_full(int skfd,
const char * ifname,
const char * input,
unsigned char * key,
__u16 * flags);
/* ----------------- POWER MANAGEMENT SUBROUTINES ----------------- */
void
iw_print_pm_value(char * buffer,
int buflen,
int value,
int flags,
int we_version);
void
iw_print_pm_mode(char * buffer,
int buflen,
int flags);
/* --------------- RETRY LIMIT/LIFETIME SUBROUTINES --------------- */
void
iw_print_retry_value(char * buffer,
int buflen,
int value,
int flags,
int we_version);
/* ----------------------- TIME SUBROUTINES ----------------------- */
void
iw_print_timeval(char * buffer,
int buflen,
const struct timeval * time,
const struct timezone * tz);
/* --------------------- ADDRESS SUBROUTINES ---------------------- */
int
iw_check_mac_addr_type(int skfd,
const char * ifname);
int
iw_check_if_addr_type(int skfd,
const char * ifname);
#if 0
int
iw_check_addr_type(int skfd,
const char * ifname);
#endif
#if 0
int
iw_get_mac_addr(int skfd,
const char * name,
struct ether_addr * eth,
unsigned short * ptype);
#endif
char *
iw_mac_ntop(const unsigned char * mac,
int maclen,
char * buf,
int buflen);
void
iw_ether_ntop(const struct ether_addr * eth,
char * buf);
char *
iw_sawap_ntop(const struct sockaddr * sap,
char * buf);
int
iw_mac_aton(const char * orig,
unsigned char * mac,
int macmax);
int
iw_ether_aton(const char* bufp, struct ether_addr* eth);
int
iw_in_inet(char *bufp, struct sockaddr *sap);
int
iw_in_addr(int skfd,
const char * ifname,
char * bufp,
struct sockaddr * sap);
/* ----------------------- MISC SUBROUTINES ------------------------ */
int
iw_get_priv_size(int args);
/* ---------------------- EVENT SUBROUTINES ---------------------- */
void
iw_init_event_stream(struct stream_descr * stream,
char * data,
int len);
int
iw_extract_event_stream(struct stream_descr * stream,
struct iw_event * iwe,
int we_version);
/* --------------------- SCANNING SUBROUTINES --------------------- */
int
iw_process_scan(int skfd,
char * ifname,
int we_version,
wireless_scan_head * context);
int
iw_scan(int skfd,
char * ifname,
int we_version,
wireless_scan_head * context);
/**************************** VARIABLES ****************************/
/* Modes as human readable strings */
extern const char * const iw_operation_mode[];
#define IW_NUM_OPER_MODE 7
#define IW_NUM_OPER_MODE_EXT 8
/* Modulations as human readable strings */
extern const struct iw_modul_descr iw_modul_list[];
#define IW_SIZE_MODUL_LIST 16
/************************* INLINE FUNTIONS *************************/
/*
* Functions that are so simple that it's more efficient inlining them
*/
/*
* Note : I've defined wrapper for the ioctl request so that
* it will be easier to migrate to other kernel API if needed
*/
/*------------------------------------------------------------------*/
/*
* Wrapper to push some Wireless Parameter in the driver
*/
static inline int
iw_set_ext(int skfd, /* Socket to the kernel */
const char * ifname, /* Device name */
int request, /* WE ID */
struct iwreq * pwrq) /* Fixed part of the request */
{
/* Set device name */
strncpy(pwrq->ifr_name, ifname, IFNAMSIZ);
/* Do the request */
return(ioctl(skfd, request, pwrq));
}
/*------------------------------------------------------------------*/
/*
* Wrapper to extract some Wireless Parameter out of the driver
*/
static inline int
iw_get_ext(int skfd, /* Socket to the kernel */
const char * ifname, /* Device name */
int request, /* WE ID */
struct iwreq * pwrq) /* Fixed part of the request */
{
/* Set device name */
strncpy(pwrq->ifr_name, ifname, IFNAMSIZ);
/* Do the request */
return(ioctl(skfd, request, pwrq));
}
/*------------------------------------------------------------------*/
/*
* Close the socket used for ioctl.
*/
static inline void
iw_sockets_close(int skfd)
{
close(skfd);
}
/*------------------------------------------------------------------*/
/*
* Display an Ethernet Socket Address in readable format.
*/
static inline char *
iw_saether_ntop(const struct sockaddr *sap, char* bufp)
{
iw_ether_ntop((const struct ether_addr *) sap->sa_data, bufp);
return bufp;
}
/*------------------------------------------------------------------*/
/*
* Input an Ethernet Socket Address and convert to binary.
*/
static inline int
iw_saether_aton(const char *bufp, struct sockaddr *sap)
{
sap->sa_family = ARPHRD_ETHER;
return iw_ether_aton(bufp, (struct ether_addr *) sap->sa_data);
}
/*------------------------------------------------------------------*/
/*
* Create an Ethernet broadcast address
*/
static inline void
iw_broad_ether(struct sockaddr *sap)
{
sap->sa_family = ARPHRD_ETHER;
memset((char *) sap->sa_data, 0xFF, ETH_ALEN);
}
/*------------------------------------------------------------------*/
/*
* Create an Ethernet NULL address
*/
static inline void
iw_null_ether(struct sockaddr *sap)
{
sap->sa_family = ARPHRD_ETHER;
memset((char *) sap->sa_data, 0x00, ETH_ALEN);
}
/*------------------------------------------------------------------*/
/*
* Compare two ethernet addresses
*/
static inline int
iw_ether_cmp(const struct ether_addr* eth1, const struct ether_addr* eth2)
{
return memcmp(eth1, eth2, sizeof(*eth1));
}
#ifdef __cplusplus
}
#endif
#endif /* IWLIB_H */

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/*
Copyright (C) 2013 CoolStream International Ltd
Based on iwlist.c, Copyright (c) 1997-2007 Jean Tourrilhes <jt@hpl.hp.com>
License: GPLv2
This program 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;
This program 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.
*/
#include <sys/time.h>
extern "C" {
#include "iwlib.h" /* Header */
}
#include <config.h>
#include "iwscan.h"
static void device_up(std::string dev)
{
int sockfd;
struct ifreq ifr;
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd < 0) {
perror("socket");
return;
}
memset(&ifr, 0, sizeof ifr);
strncpy(ifr.ifr_name, dev.c_str(), IFNAMSIZ);
if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0)
perror("SIOCGIFFLAGS");
ifr.ifr_flags |= IFF_UP | IFF_RUNNING;
if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0)
perror("SIOCSIFFLAGS");
close(sockfd);
}
bool get_wlan_list(std::string dev, std::vector<wlan_network> &networks)
{
int skfd;
struct iwreq wrq;
unsigned char * buffer = NULL; /* Results */
int buflen = IW_SCAN_MAX_DATA; /* Min for compat WE<17 */
struct iw_range range;
int has_range;
struct timeval tv; /* Select timeout */
int timeout = 15000000; /* 15s */
const char * ifname = dev.c_str();
networks.clear();
device_up(dev);
if((skfd = iw_sockets_open()) < 0)
{
perror("socket");
return false;
}
/* Get range stuff */
has_range = (iw_get_range_info(skfd, ifname, &range) >= 0);
/* Check if the interface could support scanning. */
if((!has_range) || (range.we_version_compiled < 14))
{
fprintf(stderr, "%-8.16s Interface doesn't support scanning.\n\n",
ifname);
goto _return;
}
/* Init timeout value -> 250ms between set and first get */
tv.tv_sec = 0;
tv.tv_usec = 250000;
wrq.u.data.pointer = NULL;
wrq.u.data.flags = 0;
wrq.u.data.length = 0;
/* Initiate Scanning */
if(iw_set_ext(skfd, ifname, SIOCSIWSCAN, &wrq) < 0)
{
if(errno != EPERM)
{
fprintf(stderr, "%-8.16s Interface doesn't support scanning : %s\n\n",
ifname, strerror(errno));
goto _return;
}
/* If we don't have the permission to initiate the scan, we may
* still have permission to read left-over results.
* But, don't wait !!! */
tv.tv_usec = 0;
}
timeout -= tv.tv_usec;
/* Forever */
while(1)
{
fd_set rfds; /* File descriptors for select */
int last_fd; /* Last fd */
int ret;
/* Guess what ? We must re-generate rfds each time */
FD_ZERO(&rfds);
last_fd = -1;
/* In here, add the rtnetlink fd in the list */
/* Wait until something happens */
ret = select(last_fd + 1, &rfds, NULL, NULL, &tv);
/* Check if there was an error */
if(ret < 0)
{
if(errno == EAGAIN || errno == EINTR)
continue;
fprintf(stderr, "Unhandled signal - exiting...\n");
goto _return;
}
/* Check if there was a timeout */
if(ret == 0)
{
unsigned char * newbuf;
realloc:
/* (Re)allocate the buffer - realloc(NULL, len) == malloc(len) */
newbuf = (unsigned char *) realloc(buffer, buflen);
if(newbuf == NULL)
{
fprintf(stderr, "%s: Allocation failed\n", __FUNCTION__);
goto _return;
}
buffer = newbuf;
/* Try to read the results */
wrq.u.data.pointer = buffer;
wrq.u.data.flags = 0;
wrq.u.data.length = buflen;
if(iw_get_ext(skfd, ifname, SIOCGIWSCAN, &wrq) < 0)
{
/* Check if buffer was too small (WE-17 only) */
if((errno == E2BIG) && (range.we_version_compiled > 16))
{
/* Some driver may return very large scan results, either
* because there are many cells, or because they have many
* large elements in cells (like IWEVCUSTOM). Most will
* only need the regular sized buffer. We now use a dynamic
* allocation of the buffer to satisfy everybody. Of course,
* as we don't know in advance the size of the array, we try
* various increasing sizes. Jean II */
/* Check if the driver gave us any hints. */
if(wrq.u.data.length > buflen)
buflen = wrq.u.data.length;
else
buflen *= 2;
/* Try again */
goto realloc;
}
/* Check if results not available yet */
if(errno == EAGAIN)
{
/* Restart timer for only 100ms*/
tv.tv_sec = 0;
tv.tv_usec = 100000;
timeout -= tv.tv_usec;
if(timeout > 0)
continue; /* Try again later */
}
/* Bad error */
fprintf(stderr, "%-8.16s Failed to read scan data : %s\n\n",
ifname, strerror(errno));
goto _return;
}
else
/* We have the results, go to process them */
break;
}
/* In here, check if event and event type
* if scan event, read results. All errors bad & no reset timeout */
}
if(wrq.u.data.length)
{
struct iw_event iwe;
struct iw_event * event = &iwe;
struct stream_descr stream;
int ret;
printf("%-8.16s Scan completed :\n", ifname);
iw_init_event_stream(&stream, (char *) buffer, wrq.u.data.length);
int count = -1;
while(1)
{
wlan_network network;
/* Extract an event and print it */
ret = iw_extract_event_stream(&stream, &iwe,
range.we_version_compiled);
if (ret <= 0)
break;
switch(event->cmd) {
case SIOCGIWESSID:
{
char essid[IW_ESSID_MAX_SIZE+1];
memset(essid, '\0', sizeof(essid));
if((event->u.essid.pointer) && (event->u.essid.length))
memcpy(essid, event->u.essid.pointer, event->u.essid.length);
if(event->u.essid.flags)
{
printf(" ESSID:\"%s\"\n", essid);
network.ssid = essid;
}
else {
printf(" ESSID:off/any/hidden\n");
network.ssid = "(hidden)";
}
count++;
networks.push_back(network);
}
break;
case SIOCGIWFREQ:
{
double freq; /* Frequency/channel */
int channel = -1; /* Converted to channel */
char buf[128];
freq = iw_freq2float(&(event->u.freq));
/* Convert to channel if possible */
if(has_range)
channel = iw_freq_to_channel(freq, &range);
iw_print_freq(buf, sizeof(buf),
freq, channel, event->u.freq.flags);
#if 0
if ((channel < 0) && (freq < KILO))
channel = freq;
#endif
printf(" %s\n", buf);
networks[count].channel = buf;
}
break;
case IWEVQUAL:
{
char buf[128];
iw_print_stats(buf, sizeof(buf),
&event->u.qual, &range, has_range);
printf(" %s\n", buf);
networks[count].qual = buf;
std::size_t found = networks[count].qual.find_first_of(' ');
if (found != std::string::npos)
networks[count].qual = networks[count].qual.substr(0, found);
}
break;
case SIOCGIWENCODE:
if(event->u.data.flags & IW_ENCODE_DISABLED)
networks[count].encrypted = 0;
else
networks[count].encrypted = 1;
printf(" Encryption key:%s\n", networks[count].encrypted ? "on" : "off");
break;
}
}
printf("\n");
}
else
printf("%-8.16s No scan results\n\n", ifname);
_return:
if (buffer)
free(buffer);
iw_sockets_close(skfd);
return !networks.empty();
}

36
lib/libiw/iwscan.h Normal file
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@@ -0,0 +1,36 @@
/*
Copyright (C) 2013 CoolStream International Ltd
License: GPLv2
This program 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;
This program 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.
*/
#ifndef _IWSCAN_H_
#define _IWSCAN_H_
#include <vector>
#include <string>
struct wlan_network
{
std::string ssid;
int encrypted;
std::string channel;
std::string qual;
wlan_network(): encrypted(0) {}
};
bool get_wlan_list(std::string dev, std::vector<wlan_network> &networks);
#endif

1120
lib/libiw/wireless.h Normal file
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