nexmon – Rev 1
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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 */