madwifi-ng.h File Reference

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Defines
#define	SIOC80211IFCREATE   (SIOCDEVPRIVATE+7)
#define	SIOC80211IFDESTROY   (SIOCDEVPRIVATE+8)
#define	IEEE80211_CLONE_BSSID   0x0001
#define	IEEE80211_NO_STABEACONS   0x0002
#define	IEEE80211_M_STA   1
#define	IEEE80211_M_IBSS   0
#define	IEEE80211_M_MASTER   6
#define	IEEE80211_M_MONITOR   8
Functions
int	selectChannelMADWIFI_NG (char *devname, int channel)
int	shutCardMADWIFI_NG (char *devname)
int	openCardMADWIFI_NG (char *devname)
int	getPacketMADWIFI_NG (p80211_caphdr_t *wlan_header, UINT8 *buf, int maxlen)
int	openPacketMADWIFI_NG (char *devname)
void	closePacketMADWIFI_NG (void)

---

Define Documentation

#define SIOC80211IFCREATE   (SIOCDEVPRIVATE+7)

Definition at line 31 of file madwifi-ng.h.

Referenced by openCardMADWIFI_NG().

#define SIOC80211IFDESTROY   (SIOCDEVPRIVATE+8)

Definition at line 32 of file madwifi-ng.h.

Referenced by DestroyVAP_MADWIFI_NG().

#define IEEE80211_CLONE_BSSID   0x0001

Definition at line 34 of file madwifi-ng.h.

Referenced by openCardMADWIFI_NG().

#define IEEE80211_NO_STABEACONS   0x0002

Definition at line 35 of file madwifi-ng.h.

#define IEEE80211_M_STA   1

Definition at line 37 of file madwifi-ng.h.

#define IEEE80211_M_IBSS   0

Definition at line 38 of file madwifi-ng.h.

#define IEEE80211_M_MASTER   6

Definition at line 39 of file madwifi-ng.h.

#define IEEE80211_M_MONITOR   8

Definition at line 40 of file madwifi-ng.h.

Referenced by openCardMADWIFI_NG().

---

Function Documentation

int selectChannelMADWIFI_NG	(	char *	devname,
		int	channel
	)

Definition at line 59 of file madwifi-ng.c.

References IwconfigSetChannel().

Referenced by selectChannel().

{
  int result = 0;

  result = IwconfigSetChannel(devname, channel);

  //return NO_ERROR;                     // XXX no error if channel is forbidden
  return result;
}

int shutCardMADWIFI_NG

(

char *

devname

)

Definition at line 69 of file madwifi-ng.c.

References DestroyVAP_MADWIFI_NG().

Referenced by shutCard().

{
  // Destroy the created VAP
  return (DestroyVAP_MADWIFI_NG(devname));
}

int openCardMADWIFI_NG

(

char *

devname

)

Definition at line 133 of file madwifi-ng.c.

References debug, DestroyVAP_MADWIFI_NG(), devname1, devname2, findAvailableIF(), IEEE80211_CLONE_BSSID, IEEE80211_M_MONITOR, IfconfigSetFlags(), MADWIFING_ERROR_CANT_CREATE_SOCKET, MADWIFING_ERROR_NO_DEVICE_PRESENT, MADWIFING_ERROR_NO_INTERFACE_AVAILABLE, MADWIFING_ERROR_NO_VAP_CREATED, SIOC80211IFCREATE, STR_MAX, and warning().

Referenced by openCard().

{
  char dirpath[STR_MAX];
  DIR *devdir;
  struct dirent *devfile;

  struct ieee80211_clone_params {
    char icp_name[IFNAMSIZ];
    UINT16 icp_opmode;
    UINT16 icp_flags;
  };

  struct ieee80211_clone_params cp;
  struct ifreq ifr;
  int sock;

  // -- Search if /sys arborescence is available
  snprintf(dirpath, STR_MAX, "/sys/class/net/%s/device/", devname);
  if ((devdir = opendir(dirpath)) == NULL) {
    warning("Device %s is not present !!!\n", devname);
    return MADWIFING_ERROR_NO_DEVICE_PRESENT;
  }
  // -- Determine ath and wifi interface number
  //    and destroy all VAP if exists
  while ((devfile = readdir(devdir)) != NULL) {
    if (strncmp("net:ath", devfile->d_name, 7) == 0) {
      strncpy(devname1, devfile->d_name + 4, IFNAMSIZ);
#if 0
      DestroyVAP_MADWIFI_NG(devname1);
      debug(3, "Interface %s is destroyed\n", devname1);
#else
      debug(3, "Interface %s is skiped\n", devname1);
#endif
    }

    if (strncmp("net:wifi", devfile->d_name, 8) == 0) {
      strncpy(devname2, devfile->d_name + 4, IFNAMSIZ);
      debug(3, "Found a good Interface %s\n", devname2);
    }
  }
  closedir(devdir);

  // Now all is clean
  // We can create a VAP

  // First Step : Find a ath? interface available
  if (findAvailableIF(devname1) != 0) {
    warning("No available VAP found :-(\n");
    return MADWIFING_ERROR_NO_INTERFACE_AVAILABLE;
  }
  // Master interface is now devname2
  strncpy(devname, devname2, IFNAMSIZ);
  debug(3,
        "We now use %s as the master insterface for madwifi-ng driver\n",
        devname);

  // Second Step Create VAP and put it in MONITOR mode
  memset(&cp, 0, sizeof(cp));
  strncpy(cp.icp_name, devname1, IFNAMSIZ);
  cp.icp_opmode = IEEE80211_M_MONITOR;
  cp.icp_flags = IEEE80211_CLONE_BSSID;

  memset(&ifr, 0, sizeof(ifr));
  strncpy(ifr.ifr_name, devname2, IFNAMSIZ);
  ifr.ifr_data = (caddr_t) & cp;

  if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
    warning("Failed to create socket to madwifi: %s\n", strerror(errno));
    return MADWIFING_ERROR_CANT_CREATE_SOCKET;
  }

  if (ioctl(sock, SIOC80211IFCREATE, &ifr) < 0) {
    warning("Unable to create VAP: %s\n", strerror(errno));
    close(sock);
    return MADWIFING_ERROR_NO_VAP_CREATED;
  }

  strncpy(devname1, ifr.ifr_name, IFNAMSIZ);
  debug(3, "I create a VAP in monitor mode in %s\n", ifr.ifr_name);
  close(sock);

  // Slave interface and working interface is now the same
  strncpy(devname, devname1, IFNAMSIZ);
  debug(3, "We now use %s as the slave insterface for madwifi-ng driver\n",
        devname1);

  // last step : UP the interface
  return IfconfigSetFlags(devname, IFF_UP);
}

int getPacketMADWIFI_NG	(	p80211_caphdr_t *	wlan_header,
		UINT8 *	buf,
		int	maxlen
	)

Definition at line 227 of file madwifi-ng.c.

References CaptureArg_t::DataLink, debug, FillRadioData(), MAX_BUFFER_SIZE, MAX_OF, memcpy_buff(), MIN_OF, and CaptureArg_t::pcap.

Referenced by getPacket().

{
  struct pcap_pkthdr pktHdr;
  u_char *RadioPacket;
  fd_set rs;
  int real_size_of_headers = 0;

  FD_ZERO(&rs);
  FD_SET(0, &rs);

  RadioPacket = (u_char *) pcap_next(ca.pcap, &pktHdr);

  if (RadioPacket != NULL) {
  // If no problem and packet is enought big (with data)
    if (pktHdr.len >= sizeof(p80211msg_lnxind_wlansniffrm_t)) {
      if (pktHdr.len > MAX_BUFFER_SIZE) {
  debug(1, "ERROR : Packet is TOOO BIG size=%d\n", pktHdr.len);
  //DumpHexPaquets(RealTime_WND, buf, 0x1B0);
  return 0;
      } else {
  real_size_of_headers = FillRadioData(wlan_header, ca.DataLink, RadioPacket, pktHdr.len);
  memcpy_buff(buf, (RadioPacket + real_size_of_headers), MIN_OF((pktHdr.len - real_size_of_headers), maxlen));
  return MAX_OF(0, (pktHdr.len - real_size_of_headers));
      }
    }
  }
  return (0);                   /* Noting to read */
}

int openPacketMADWIFI_NG

(

char *

devname

)

Definition at line 256 of file madwifi-ng.c.

References CalculateOffset(), CaptureArg_t::DataLink, errbuf, ERROR_CANT_OPEN_PCAP, NO_ERROR, CaptureArg_t::offset, and CaptureArg_t::pcap.

Referenced by openPacket().

{
  ca.pcap = pcap_open_live(devname, 3000, 1, 0, errbuf);
  if (ca.pcap) {
    pcap_setnonblock(ca.pcap, 1, errbuf);
    ca.DataLink = pcap_datalink(ca.pcap);
    ca.offset = CalculateOffset(ca.DataLink);
    return NO_ERROR;
  }
  return ERROR_CANT_OPEN_PCAP;
}

void closePacketMADWIFI_NG

(

void

)

Definition at line 268 of file madwifi-ng.c.

References CaptureArg_t::pcap.

Referenced by closePacket().

{
  pcap_close(ca.pcap);
}