Diffstat (limited to 'noncore/net/wellenreiter/daemon/source/sniffer.cc') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | noncore/net/wellenreiter/daemon/source/sniffer.cc | 308 |
1 files changed, 0 insertions, 308 deletions
diff --git a/noncore/net/wellenreiter/daemon/source/sniffer.cc b/noncore/net/wellenreiter/daemon/source/sniffer.cc deleted file mode 100644 index 66d5b6f..0000000 --- a/noncore/net/wellenreiter/daemon/source/sniffer.cc +++ b/dev/null @@ -1,308 +0,0 @@ -/* - * rfmon mode sniffer - * This works only with cisco wireless cards with an rfmon - * able driver and not with wifi stuff. - * - * $Id$ - */ - -#include "config.hh" -#include "cardmode.hh" -#include "sniffer.hh" -#include "ieee802_11.hh" -#include "extract.hh" - -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; - - /* 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; - } - - /* Here should be the infos to the gui issued */ - 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) -{ - 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); -} - -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((char *)pbody.ssid.ssid,"")==0) - { - ppinfo->ssid = NONBROADCASTING; - } - else - { - ppinfo->ssid = (char *)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: - - offset+= *(p+offset+1) + 2; - break; - } /* end of switch*/ - } /* end of for loop */ - return 0; - -} /* End of handle_beacon */ - - -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; -} |