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authormax <max>2002-11-11 15:37:18 (UTC)
committer max <max>2002-11-11 15:37:18 (UTC)
commit2870d8cba649ab744d0e48a2bcc537ea753f842f (patch) (side-by-side diff)
tree42976a62e43264f281eccb297bee414d6f28cbf9
parent6c6a3870a3deddc8cf66c60d37d12c1763b087b4 (diff)
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beacon-decode first
Diffstat (more/less context) (show whitespace changes)
-rw-r--r--noncore/net/wellenreiter/daemon/source/README5
-rw-r--r--noncore/net/wellenreiter/daemon/source/extract.h57
-rw-r--r--noncore/net/wellenreiter/daemon/source/ieee802_11.h245
-rw-r--r--noncore/net/wellenreiter/daemon/source/sniffer.c437
-rw-r--r--noncore/net/wellenreiter/daemon/source/sniffer.h102
5 files changed, 846 insertions, 0 deletions
diff --git a/noncore/net/wellenreiter/daemon/source/README b/noncore/net/wellenreiter/daemon/source/README
new file mode 100644
index 0000000..249d950
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/README
@@ -0,0 +1,5 @@
+compile it using:
+
+gcc -o sniffer ./sniffer.c -lpcap
+
+
diff --git a/noncore/net/wellenreiter/daemon/source/extract.h b/noncore/net/wellenreiter/daemon/source/extract.h
new file mode 100644
index 0000000..c1bcdcd
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/extract.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 1992, 1993, 1994, 1995, 1996
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * @(#) $Header$ (LBL)
+ */
+
+/* Network to host order macros */
+
+#ifdef LBL_ALIGN
+#define EXTRACT_16BITS(p) \
+ ((u_int16_t)((u_int16_t)*((const u_int8_t *)(p) + 0) << 8 | \
+ (u_int16_t)*((const u_int8_t *)(p) + 1)))
+#define EXTRACT_32BITS(p) \
+ ((u_int32_t)((u_int32_t)*((const u_int8_t *)(p) + 0) << 24 | \
+ (u_int32_t)*((const u_int8_t *)(p) + 1) << 16 | \
+ (u_int32_t)*((const u_int8_t *)(p) + 2) << 8 | \
+ (u_int32_t)*((const u_int8_t *)(p) + 3)))
+#else
+#define EXTRACT_16BITS(p) \
+ ((u_int16_t)ntohs(*(const u_int16_t *)(p)))
+#define EXTRACT_32BITS(p) \
+ ((u_int32_t)ntohl(*(const u_int32_t *)(p)))
+#endif
+
+#define EXTRACT_24BITS(p) \
+ ((u_int32_t)((u_int32_t)*((const u_int8_t *)(p) + 0) << 16 | \
+ (u_int32_t)*((const u_int8_t *)(p) + 1) << 8 | \
+ (u_int32_t)*((const u_int8_t *)(p) + 2)))
+
+/* Little endian protocol host order macros */
+
+#define EXTRACT_LE_8BITS(p) (*(p))
+#define EXTRACT_LE_16BITS(p) \
+ ((u_int16_t)((u_int16_t)*((const u_int8_t *)(p) + 1) << 8 | \
+ (u_int16_t)*((const u_int8_t *)(p) + 0)))
+#define EXTRACT_LE_32BITS(p) \
+ ((u_int32_t)((u_int32_t)*((const u_int8_t *)(p) + 3) << 24 | \
+ (u_int32_t)*((const u_int8_t *)(p) + 2) << 16 | \
+ (u_int32_t)*((const u_int8_t *)(p) + 1) << 8 | \
+ (u_int32_t)*((const u_int8_t *)(p) + 0)))
diff --git a/noncore/net/wellenreiter/daemon/source/ieee802_11.h b/noncore/net/wellenreiter/daemon/source/ieee802_11.h
new file mode 100644
index 0000000..497e6ed
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/ieee802_11.h
@@ -0,0 +1,245 @@
+/* @(#) $Header$ (LBL) */
+/*
+ * Copyright (c) 2001
+ * Fortress Technologies
+ * Charlie Lenahan ( clenahan@fortresstech.com )
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#define IEEE802_11_FC_LEN 2
+
+#define T_MGMT 0x0 /* management */
+#define T_CTRL 0x1 /* control */
+#define T_DATA 0x2 /* data */
+#define T_RESV 0x3 /* reserved */
+
+#define ST_ASSOC_REQUEST 0x0
+#define ST_ASSOC_RESPONSE 0x1
+#define ST_REASSOC_REQUEST 0x2
+#define ST_REASSOC_RESPONSE 0x3
+#define ST_PROBE_REQUEST 0x4
+#define ST_PROBE_RESPONSE 0x5
+/* RESERVED 0x6 */
+/* RESERVED 0x7 */
+#define ST_BEACON 0x8
+#define ST_ATIM 0x9
+#define ST_DISASSOC 0xA
+#define ST_AUTH 0xB
+#define ST_DEAUTH 0xC
+/* RESERVED 0xD */
+/* RESERVED 0xE */
+/* RESERVED 0xF */
+
+
+#define CTRL_PS_POLL 0xA
+#define CTRL_RTS 0xB
+#define CTRL_CTS 0xC
+#define CTRL_ACK 0xD
+#define CTRL_CF_END 0xE
+#define CTRL_END_ACK 0xF
+
+/*
+ * Bits in the frame control field.
+ */
+#define FC_VERSION(fc) ((fc) & 0x3)
+#define FC_TYPE(fc) (((fc) >> 2) & 0x3)
+#define FC_SUBTYPE(fc) (((fc) >> 4) & 0xF)
+#define FC_TO_DS(fc) ((fc) & 0x0100)
+#define FC_FROM_DS(fc) ((fc) & 0x0200)
+#define FC_MORE_FLAG(fc) ((fc) & 0x0400)
+#define FC_RETRY(fc) ((fc) & 0x0800)
+#define FC_POWER_MGMT(fc) ((fc) & 0x1000)
+#define FC_MORE_DATA(fc) ((fc) & 0x2000)
+#define FC_WEP(fc) ((fc) & 0x4000)
+#define FC_ORDER(fc) ((fc) & 0x8000)
+
+struct mgmt_header_t {
+ u_int16_t fc;
+ u_int16_t duration;
+ u_int8_t da[6];
+ u_int8_t sa[6];
+ u_int8_t bssid[6];
+ u_int16_t seq_ctrl;
+};
+
+#define MGMT_HEADER_LEN (2+2+6+6+6+2)
+
+#define CAPABILITY_ESS(cap) ((cap) & 0x0001)
+#define CAPABILITY_IBSS(cap) ((cap) & 0x0002)
+#define CAPABILITY_CFP(cap) ((cap) & 0x0004)
+#define CAPABILITY_CFP_REQ(cap) ((cap) & 0x0008)
+#define CAPABILITY_PRIVACY(cap) ((cap) & 0x0010)
+
+struct ssid_t {
+ u_int8_t element_id;
+ u_int8_t length;
+ u_char ssid[33]; /* 32 + 1 for null */
+} ;
+
+struct rates_t {
+ u_int8_t element_id;
+ u_int8_t length;
+ u_int8_t rate[8];
+};
+
+struct challenge_t {
+ u_int8_t element_id;
+ u_int8_t length;
+ u_int8_t text[254]; /* 1-253 + 1 for null */
+};
+struct fh_t {
+ u_int8_t element_id;
+ u_int8_t length;
+ u_int16_t dwell_time;
+ u_int8_t hop_set;
+ u_int8_t hop_pattern;
+ u_int8_t hop_index;
+};
+
+struct ds_t {
+ u_int8_t element_id;
+ u_int8_t length;
+ u_int8_t channel;
+};
+
+struct cf_t {
+ u_int8_t element_id;
+ u_int8_t length;
+ u_int8_t count;
+ u_int8_t period;
+ u_int16_t max_duration;
+ u_int16_t dur_remaing;
+};
+
+struct tim_t {
+ u_int8_t element_id;
+ u_int8_t length;
+ u_int8_t count;
+ u_int8_t period;
+ u_int8_t bitmap_control;
+ u_int8_t bitmap[251];
+};
+
+#define E_SSID 0
+#define E_RATES 1
+#define E_FH 2
+#define E_DS 3
+#define E_CF 4
+#define E_TIM 5
+#define E_IBSS 6
+#define E_CISCO 133
+/* reserved 7 */
+/* reserved 8 */
+/* reserved 9 */
+/* reserved 10 */
+/* reserved 11 */
+/* reserved 12 */
+/* reserved 13 */
+/* reserved 14 */
+/* reserved 15 */
+/* reserved 16 */
+
+#define E_CHALLENGE 16
+/* reserved 17 */
+/* reserved 18 */
+/* reserved 19 */
+/* reserved 16 */
+/* reserved 16 */
+
+
+struct mgmt_body_t {
+ u_int8_t timestamp[8];
+ u_int16_t beacon_interval;
+ u_int16_t listen_interval;
+ u_int16_t status_code;
+ u_int16_t aid;
+ u_char ap[6];
+ u_int16_t reason_code;
+ u_int16_t auth_alg;
+ u_int16_t auth_trans_seq_num;
+ struct challenge_t challenge;
+ u_int16_t capability_info;
+ struct ssid_t ssid;
+ struct rates_t rates;
+ struct ds_t ds;
+ struct cf_t cf;
+ struct fh_t fh;
+ struct tim_t tim;
+};
+
+struct ctrl_rts_t {
+ u_int16_t fc;
+ u_int16_t duration;
+ u_int8_t ra[6];
+ u_int8_t ta[6];
+ u_int8_t fcs[4];
+};
+
+#define CTRL_RTS_LEN (2+2+6+6+4)
+
+struct ctrl_cts_t {
+ u_int16_t fc;
+ u_int16_t duration;
+ u_int8_t ra[6];
+ u_int8_t fcs[4];
+};
+
+#define CTRL_CTS_LEN (2+2+6+4)
+
+struct ctrl_ack_t {
+ u_int16_t fc;
+ u_int16_t duration;
+ u_int8_t ra[6];
+ u_int8_t fcs[4];
+};
+
+#define CTRL_ACK_LEN (2+2+6+4)
+
+struct ctrl_ps_poll_t {
+ u_int16_t fc;
+ u_int16_t aid;
+ u_int8_t bssid[6];
+ u_int8_t ta[6];
+ u_int8_t fcs[4];
+};
+
+#define CTRL_PS_POLL_LEN (2+2+6+6+4)
+
+struct ctrl_end_t {
+ u_int16_t fc;
+ u_int16_t duration;
+ u_int8_t ra[6];
+ u_int8_t bssid[6];
+ u_int8_t fcs[4];
+};
+
+#define CTRL_END_LEN (2+2+6+6+4)
+
+struct ctrl_end_ack_t {
+ u_int16_t fc;
+ u_int16_t duration;
+ u_int8_t ra[6];
+ u_int8_t bssid[6];
+ u_int8_t fcs[4];
+};
+
+#define CTRL_END_ACK_LEN (2+2+6+6+4)
+
+#define IV_IV(iv) ((iv) & 0xFFFFFF)
+#define IV_PAD(iv) (((iv) >> 24) & 0x3F)
+#define IV_KEYID(iv) (((iv) >> 30) & 0x03)
diff --git a/noncore/net/wellenreiter/daemon/source/sniffer.c b/noncore/net/wellenreiter/daemon/source/sniffer.c
new file mode 100644
index 0000000..6f40503
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/sniffer.c
@@ -0,0 +1,437 @@
+/* Its just a simple rfmon mode sniffer
+ i hope my C is at last a bit better then in my
+ early days :-).
+ This works only with cisco wireless cards with an rfmon
+ able driver and not with wifi stuff.
+ Btw. did i mention that i hate C?
+
+ To compile use:
+ gcc wlan-sniffer.c -o wlan-sniffer -lpcap
+
+ use it like this:
+ wlan-sniffer interface
+
+*/
+#include "sniffer.h"
+
+int main(int argc, char **argv)
+{
+ int ret; /* return code */
+ ret = card_into_monitormode (SNIFFER_DEVICE, CARD_TYPE_NG);
+ if (ret == -1)
+ {
+ exit(-1);
+ }
+ start_sniffing (SNIFFER_DEVICE);
+
+ return 0;
+}
+
+int card_into_monitormode (char * device, int cardtype)
+{
+ int ret = -1;
+ int datalink; /* used for getting the pcap datalink type */
+ char CiscoRFMON[35] = "/proc/driver/aironet/";
+ FILE *CISCO_CONFIG_FILE;
+ char errbuf[PCAP_ERRBUF_SIZE];
+ pcap_t *handle;
+
+ /* Checks if we have a device to sniff on */
+ if(device == NULL)
+ {
+ printf ("Fatal error i did not have any interfaces to sniff on\n");
+ exit(1);
+ }
+
+ /* Setting the prmiscous and up flag to the interface */
+ if (card_set_promisc_up (device) == 0)
+ {
+ printf ("Interface flags correctly set using ifconfig\n");
+ }
+
+ /* Check the cardtype and executes the commands to go into monitor mode */
+ if (cardtype == CARD_TYPE_CISCO) /* I got a cisco card */
+ {
+ /* bring the sniffer into rfmon mode */
+ snprintf(CiscoRFMON, sizeof(CiscoRFMON),DEFAULT_PATH, device);
+ CISCO_CONFIG_FILE = fopen(CiscoRFMON,"w");
+ fputs ("Mode: r",CISCO_CONFIG_FILE);
+ fputs ("Mode: y",CISCO_CONFIG_FILE);
+ fputs ("XmitPower: 1",CISCO_CONFIG_FILE);
+ fclose(CISCO_CONFIG_FILE);
+ }
+ else if (cardtype == CARD_TYPE_NG)
+ {
+ char wlanngcmd[62];
+ snprintf(wlanngcmd, sizeof(wlanngcmd),"%s %s lnxreq_wlansniff channel=1 enable=true",WLANCTL_PATH,device);
+ if (ret = (system (wlanngcmd)) != 0)
+ {
+ printf ("\n Fatal error could not set %s in raw mode, check cardtype\n",device);
+ exit(1);
+ }
+ }
+ else if (cardtype == CARD_TYPE_HOSTAP)
+ {
+ printf ("Got a host-ap card, nothing is implemented now\n");
+ }
+
+
+ /* Check the interface if it is in the correct raw mode */
+ handle = pcap_open_live(device, BUFSIZ, 1, 0, errbuf);
+
+ /* getting the datalink type */
+ datalink = pcap_datalink(handle);
+
+ if (datalink == DLT_IEEE802_11) /* Rawmode is IEEE802_11 */
+ {
+ printf ("Your successfully listen on %s in 802.11 raw mode\n",device);
+ pcap_close(handle);
+ return (0);
+
+ }
+ else
+ {
+ printf ("Fatal error, cannot continue, your interface %s does not work in the correct 802.11 raw mode, check you driver please\n",device);
+ pcap_close(handle);
+ exit(1);
+ }
+}
+
+int card_set_promisc_up (char * device)
+{
+ int ret;
+ char ifconfigcmd[32];
+ snprintf(ifconfigcmd,sizeof(ifconfigcmd),SBIN_PATH, device);
+ ret = system (ifconfigcmd);
+ if (ret > 0)
+ {
+ printf ("\nFatal error, could not execute %s please check your card,binary location and permission\n",ifconfigcmd);
+ exit(1);
+ }
+ return(0);
+}
+
+int start_sniffing (char * device)
+{
+ int ret; /* return code */
+ pcap_t *handletopcap;
+ char errbuf[PCAP_ERRBUF_SIZE];
+ struct pcap_pkthdr header; /* The header that pcap gives us */
+ const u_char *packet; /* The actual packet */
+
+ /* opening the pcap for sniffing */
+ handletopcap = pcap_open_live(device, BUFSIZ, 1, 1000, errbuf);
+
+ /* Next few lines a taken out of kismet */
+ #ifdef HAVE_PCAP_NONBLOCK
+ pcap_setnonblock(handletopcap, 1, errstr);
+ #endif
+
+ /*start scanning */
+ pcap_loop(handletopcap,-1,process_packets,NULL);
+
+ printf("\nDone processing packets... wheew!\n");
+ return 0;
+}
+
+void process_packets(u_char *useless,const struct pcap_pkthdr* pkthdr,const u_char* packet)
+{
+ u_int caplen = pkthdr->caplen;
+ u_int length = pkthdr->len;
+ u_int16_t fc;
+ u_int HEADER_LENGTH;
+ u_short extracted_ethertype;
+ int snapend;
+ int ret;
+ /* pinfo holds all interresting information for us */
+ struct packetinfo pinfo;
+ struct packetinfo *pinfoptr;
+ pinfoptr=&pinfo;
+
+ pinfoptr->isvalid = 0;
+ pinfoptr->pktlen = pkthdr->len;
+ if (caplen < IEEE802_11_FC_LEN)
+ {
+ /* This is a garbage packet, because is does not long enough
+ to hold a 802.11b header */
+ pinfoptr->isvalid = 0;
+ return;
+ }
+
+ /* Gets the framecontrol bits (2bytes long) */
+ fc = EXTRACT_LE_16BITS(packet);
+
+ HEADER_LENGTH = GetHeaderLength(fc);
+
+ if (caplen < HEADER_LENGTH)
+ {
+ /* This is a garbage packet, because it is not long enough
+ to hold a correct header of its type */
+ pinfoptr->isvalid = 0;
+ return;
+ }
+
+ /* Decode 802.11b header out of the packet */
+ if (decode_80211b_hdr(packet,pinfoptr) == 0)
+ {
+ /* Justification of the ofset to further process the packet */
+ length -= HEADER_LENGTH;
+ caplen -= HEADER_LENGTH;
+ packet += HEADER_LENGTH;
+ }
+ else
+ { /* Something is wrong,could not be a correct packet */
+ return;
+ }
+
+ switch (FC_TYPE(fc))
+ {
+ /* Is it a managemnet frame? */
+ case T_MGMT:
+ switch (FC_SUBTYPE(fc))
+ { /* Is it a beacon frame? */
+ case ST_BEACON:
+ if (handle_beacon(fc, packet,pinfoptr) ==0)
+ {
+ if (!strcmp(pinfoptr->desthwaddr,"ff:ff:ff:ff:ff:ff") == 0)
+ {
+ /* Every beacon must have the broadcast as destination
+ so it must be a shitti packet */
+ pinfoptr->isvalid = 0;
+ return;
+ }
+ if (pinfoptr->cap_ESS == pinfoptr->cap_IBSS)
+ {
+ /* Only one of both are possible, so must be
+ a noise packet, if this comes up */
+ pinfoptr->isvalid = 0;
+ return;
+ }
+ if (pinfoptr->channel < 1 || pinfoptr->channel > 14)
+ {
+ /* Only channels between 1 and 14 are possible
+ others must be noise packets */
+ pinfoptr->isvalid = 0;
+ return;
+ }
+
+ /* Decoding successfull of beacon frame */
+ if (pinfoptr->cap_ESS == 1 &&pinfoptr->cap_IBSS ==0)
+ {
+ printf ("\nHave found an accesspoint:");
+ }
+ else if(pinfoptr->cap_ESS == 0 && pinfoptr->cap_IBSS == 1)
+ {
+ printf ("\nHave found an AD-HOC station:");
+
+ }
+ if (strcmp (pinfoptr->ssid,NONBROADCASTING) ==0)
+ {
+ printf ("\n\tOn a non-broadcasting network");
+ }
+ else
+ {
+ printf ("\n\tOn network : %s",pinfoptr->ssid);
+ }
+ printf ("\n\tLen SSID : %d",pinfoptr->ssid_len);
+ printf ("\n\tOn Channel : %d",pinfoptr->channel);
+ printf ("\n\tEncryption : %s", pinfoptr->cap_WEP ? "ON" : "OFF");
+ printf ("\n\tMacaddress : %s",pinfoptr->sndhwaddr);
+ printf ("\n\tBssid : %s",pinfoptr->bssid);
+ printf ("\n\tDest : %s\n",pinfoptr->desthwaddr);
+ }
+ break;
+ default:
+ printf("Unknown IEEE802.11 frame subtype (%d)",FC_SUBTYPE(fc));
+ break;
+ } /* End of switch over different mgt frame types */
+
+ break;
+ case T_CTRL:
+ // decode_control_frames(fc, packet);
+ printf ("Its a control frame");
+ break;
+ case T_DATA:
+ // decode_data_frames(fc, packet);
+ printf ("Its a date frame");
+ break;
+ default:
+ printf("Unknown IEEE802.11 frame type (%d)",FC_TYPE(fc));
+ break;
+ }
+}
+
+
+/* This decodes the 802.11b frame header out of the 802.11b packet
+ all the infos is placed into the packetinfo structure */
+int decode_80211b_hdr(const u_char *p,struct packetinfo *ppinfo)
+{
+ char * ret;
+ char testme[16];
+ const struct mgmt_header_t *mgthdr = (const struct mgmt_header_t *) p;
+ ppinfo->fcsubtype = FC_SUBTYPE(mgthdr->fc);
+
+ /* Get the sender, bssid and dest mac address */
+ etheraddr_string(mgthdr->bssid,ppinfo->bssid);
+ etheraddr_string(mgthdr->da,ppinfo->desthwaddr);
+ etheraddr_string(mgthdr->sa,ppinfo->sndhwaddr);
+ ppinfo->fc_wep = FC_WEP(mgthdr->fc);
+ return(0);
+}
+
+
+void etheraddr_string(register const u_char *ep,char * text)
+{
+ static char hex[] = "0123456789abcdef";
+ register u_int i, j;
+ register char *cp;
+ char buf[sizeof("00:00:00:00:00:00")];
+ cp = buf;
+ if ((j = *ep >> 4) != 0)
+ *cp++ = hex[j];
+ *cp++ = hex[*ep++ & 0xf];
+ for (i = 5; (int)--i >= 0;) {
+ *cp++ = ':';
+ if ((j = *ep >> 4) != 0)
+ *cp++ = hex[j];
+ *cp++ = hex[*ep++ & 0xf];
+ }
+ *cp = '\0';
+ strcpy(text,buf);
+ return;
+}
+
+int handle_beacon(u_int16_t fc, const u_char *p,struct packetinfo *ppinfo)
+{
+ struct mgmt_body_t pbody;
+ int offset = 0;
+
+ /* Get the static informations out of the packet */
+ memset(&pbody, 0, sizeof(pbody));
+ memcpy(&pbody.timestamp, p, 8);
+ offset += 8;
+ pbody.beacon_interval = EXTRACT_LE_16BITS(p+offset);
+ offset += 2;
+ pbody.capability_info = EXTRACT_LE_16BITS(p+offset);
+ offset += 2;
+
+ /* Gets the different flags out of the capabilities */
+ ppinfo->cap_ESS = CAPABILITY_ESS(pbody.capability_info);
+ ppinfo->cap_IBSS = CAPABILITY_IBSS(pbody.capability_info);
+ ppinfo->cap_WEP = CAPABILITY_PRIVACY(pbody.capability_info);
+
+ /* Gets the tagged elements out of the packets */
+ while (offset + 1 < ppinfo->pktlen)
+ {
+ switch (*(p + offset))
+ {
+ case E_SSID:
+ memcpy(&(pbody.ssid),p+offset,2); offset += 2;
+ if (pbody.ssid.length > 0)
+ {
+ memcpy(&(pbody.ssid.ssid),p+offset,pbody.ssid.length); offset += pbody.ssid.length;
+ pbody.ssid.ssid[pbody.ssid.length]='\0';
+ if (strcmp(pbody.ssid.ssid,"")==0)
+ {
+ ppinfo->ssid = NONBROADCASTING;
+ }
+ else
+ {
+ ppinfo->ssid = pbody.ssid.ssid;
+ }
+ ppinfo->ssid_len = pbody.ssid.length;
+ }
+ break;
+ case E_CHALLENGE:
+ memcpy(&(pbody.challenge),p+offset,2); offset += 2;
+ if (pbody.challenge.length > 0)
+ {
+ memcpy(&(pbody.challenge.text),p+offset,pbody.challenge.length); offset += pbody.challenge.length;
+ pbody.challenge.text[pbody.challenge.length]='\0';
+ }
+ break;
+ case E_RATES:
+ memcpy(&(pbody.rates),p+offset,2); offset += 2;
+ if (pbody.rates.length > 0) {
+ memcpy(&(pbody.rates.rate),p+offset,pbody.rates.length); offset += pbody.rates.length;
+ }
+ break;
+ case E_DS:
+ memcpy(&(pbody.ds),p+offset,3); offset +=3;
+ ppinfo->channel = pbody.ds.channel;
+ break;
+ case E_CF:
+ memcpy(&(pbody.cf),p+offset,8); offset +=8;
+ break;
+ case E_TIM:
+ memcpy(&(pbody.tim),p+offset,2); offset +=2;
+ memcpy(&(pbody.tim.count),p+offset,3); offset +=3;
+ if ((pbody.tim.length -3) > 0)
+ {
+ memcpy((pbody.tim.bitmap),p+(pbody.tim.length -3),(pbody.tim.length -3));
+ offset += pbody.tim.length -3;
+ }
+ break;
+ default:
+#if 0
+ printf("(1) unhandled element_id (%d) ", *(p+offset) );
+#endif
+ offset+= *(p+offset+1) + 2;
+ break;
+ } /* end of switch*/
+ } /* end of for loop */
+ return(0);
+
+
+
+
+} /* End of handle_beacon */
+
+
+static int GetHeaderLength(u_int16_t fc)
+{
+ int iLength=0;
+
+ switch (FC_TYPE(fc)) {
+ case T_MGMT:
+ iLength = MGMT_HEADER_LEN;
+ break;
+ case T_CTRL:
+ switch (FC_SUBTYPE(fc)) {
+ case CTRL_PS_POLL:
+ iLength = CTRL_PS_POLL_LEN;
+ break;
+ case CTRL_RTS:
+ iLength = CTRL_RTS_LEN;
+ break;
+ case CTRL_CTS:
+ iLength = CTRL_CTS_LEN;
+ break;
+ case CTRL_ACK:
+ iLength = CTRL_ACK_LEN;
+ break;
+ case CTRL_CF_END:
+ iLength = CTRL_END_LEN;
+ break;
+ case CTRL_END_ACK:
+ iLength = CTRL_END_ACK_LEN;
+ break;
+ default:
+ iLength = 0;
+ break;
+ }
+ break;
+ case T_DATA:
+ if (FC_TO_DS(fc) && FC_FROM_DS(fc))
+ iLength = 30;
+ else
+ iLength = 24;
+ break;
+ default:
+ printf("unknown IEEE802.11 frame type (%d)",
+ FC_TYPE(fc));
+ break;
+ }
+
+ return iLength;
+}
diff --git a/noncore/net/wellenreiter/daemon/source/sniffer.h b/noncore/net/wellenreiter/daemon/source/sniffer.h
new file mode 100644
index 0000000..b880b68
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/sniffer.h
@@ -0,0 +1,102 @@
+// Wellenreiter-sniffer-code header file
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <pcap.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <net/bpf.h>
+#include "ieee802_11.h"
+#include "extract.h"
+
+#define DEFAULT_PATH "/proc/driver/aironet/%s/Config"
+#define CARD_TYPE_CISCO 1
+#define CARD_TYPE_NG 2
+#define CARD_TYPE_HOSTAP 3
+
+#define NONBROADCASTING "non-broadcasting"
+
+/* only for now, until we have the daemon running */
+/*the config file should provide these information */
+#define SNIFFER_DEVICE "wlan0"
+#define CARD_TYPE CARD_TYPE_CISCO
+#define SBIN_PATH "/sbin/ifconfig %s promisc up"
+#define WLANCTL_PATH "/sbin/wlanctl-ng"
+
+/* holds all the interresting data */
+struct packetinfo
+{
+ int isvalid;
+ int pktlen;
+ int fctype;
+ int fcsubtype;
+ int fc_wep;
+ int cap_WEP;
+ int cap_IBSS;
+ int cap_ESS;
+ int channel;
+ char bssid[sizeof("00:00:00:00:00:00")];
+ char desthwaddr[sizeof("00:00:00:00:00:00")];
+ char sndhwaddr[sizeof("00:00:00:00:00:00")];
+ char *ssid;
+ int ssid_len;
+};
+
+
+/* Prototypes */
+int card_into_monitormode (char * device, int cardtype);
+
+int card_set_promisc_up (char * device);
+
+int start_sniffing (char * device);
+
+void process_packets(u_char *useless,const struct pcap_pkthdr* pkthdr,const u_char* packet);
+
+int decode_80211b_hdr(const u_char *p,struct packetinfo *ppinfo);
+
+void etheraddr_string(register const u_char *ep,char * text);
+
+int handle_beacon(u_int16_t fc, const u_char *p,struct packetinfo *ppinfo);
+
+static int GetHeaderLength(u_int16_t fc);
+
+static const char *subtype_text[]={
+ "Assoc Request",
+ "Assoc Response",
+ "ReAssoc Request",
+ "ReAssoc Response",
+ "Probe Request",
+ "Probe Response",
+ "RESERVED",
+ "RESERVED",
+ "Beacon",
+ "ATIM",
+ "Disassociation",
+ "Authentication",
+ "DeAuthentication",
+ "RESERVED",
+ "RESERVED"
+};
+
+/*
+ * True if "l" bytes of "var" were captured.
+ *
+ * The "snapend - (l) <= snapend" checks to make sure "l" isn't so large
+ * that "snapend - (l)" underflows.
+ *
+ * The check is for <= rather than < because "l" might be 0.
+ */
+#define TTEST2(var, l) (snapend - (l) <= snapend && \
+ (const u_char *)&(var) <= snapend - (l))
+
+/* True if "var" was captured */
+#define TTEST(var) TTEST2(var, sizeof(var))
+
+/* Bail if "l" bytes of "var" were not captured */
+#define TCHECK2(var, l) if (!TTEST2(var, l)) goto trunc
+
+/* Bail if "var" was not captured */
+#define TCHECK(var) TCHECK2(var, sizeof(var))