added memsets

1 files changed, 4 insertions, 1 deletions

diff --git a/noncore/net/wellenreiter/libwellenreiter/source/sniff.cc b/noncore/net/wellenreiter/libwellenreiter/source/sniff.cc
index 9b4e360..e516177 100644
--- a/noncore/net/wellenreiter/libwellenreiter/source/sniff.cc
+++ b/noncore/net/wellenreiter/libwellenreiter/source/sniff.cc
@@ -13,209 +13,212 @@
 /* Main function, checks packets */
 void process_packets(const struct pcap_pkthdr *pkthdr, const unsigned char *packet, char *guihost, int guiport)
 {
   unsigned int caplen = pkthdr->caplen;
   unsigned int length = pkthdr->len;
   u_int16_t fc;
   unsigned int HEADER_LENGTH;
   
   /* pinfo holds all interresting information for us */
   struct packetinfo pinfo;
   struct packetinfo *pinfoptr;
 
   /* wl_network_t will finally be set and send to the ui */
   wl_network_t wl_net;
 
   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))
       {
 	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)
 		{
 		  wl_loginfo("Found an access point");
 		  wl_net.net_type=1;
 		}
 	      else if(pinfoptr->cap_ESS == 0 && pinfoptr->cap_IBSS == 2) 
 		{
 		  wl_loginfo("Found an ad-hoc network");
 		  wl_net.net_type=2;
 		}
 
+	      memset(wl_net.bssid, 0, sizeof(wl_net.bssid));
+
 	      if (strcmp (pinfoptr->ssid,NONBROADCASTING) ==0)
 		  wl_loginfo("Net is a non-broadcasting network");
 	      else
 		  wl_loginfo("SSID is: %s", pinfoptr->ssid);
 
               wl_loginfo("SSID is: %s", pinfoptr->ssid);
 	      memcpy(wl_net.bssid, pinfoptr->ssid, sizeof(wl_net.bssid)-1);
 
 	      wl_loginfo("SSID length is: %d", pinfoptr->ssid_len);
 	      wl_net.ssid_len=pinfoptr->ssid_len;
 	    
               wl_loginfo("Channel is: %d", pinfoptr->channel);
 	      wl_net.channel=pinfoptr->channel;
 	      wl_net.wep=pinfoptr->cap_WEP;
 
 	      wl_loginfo("Mac is: %s", pinfoptr->sndhwaddr);
-	      memcpy(wl_net.mac, pinfoptr->sndhwaddr, sizeof(wl_net.mac)-1);;
+	      memset(wl_net.mac, 0, sizeof(wl_net.mac));
+	      memcpy(wl_net.mac, pinfoptr->sndhwaddr, sizeof(wl_net.mac)-1);
 	      
 	      if(!send_network_found((char *)guihost, guiport, &wl_net))
 	      {
 		wl_logerr("Error sending data to UI: %s", strerror(errno));
 		break;
 	      }
 	      wl_loginfo("Sent network to GUI '%s:%d'", guihost, guiport);
 	    }
 	  break;	
 
 	default:
 	  wl_logerr("Unknown IEEE802.11 frame subtype (%d)", FC_SUBTYPE(fc));
 	  break;	
 	} /* End of switch over different mgt frame types */
       
       break;
   
   case T_CTRL:
     wl_loginfo("Received control frame, not implemented yet");
     break;
 
   case T_DATA:
     wl_loginfo("Received date frame, not implemented yet");
     break;
 
   default:
     wl_logerr("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 unsigned int i, j;
   register char *cp;
   char buf[sizeof("00:00:00:00:00:00\0")];
   cp = buf;
   if ((j = *ep >> 4) != 0)
   {
   	*cp++ = hex[j];
   }
   else
   {
   	*cp++ = '0';
   }
   *cp++ = hex[*ep++ & 0xf];
   
   for (i = 5; (int)--i >= 0;) 
   {
     *cp++ = ':';
     if ((j = *ep >> 4) != 0)
     {
     	*cp++ = hex[j];
     }
     else
     {
     	*cp++ = '0';
     }
   
     *cp++ = hex[*ep++ & 0xf];
   }
   *cp = '\0';
   strcpy(text,buf);
 }
 
 /* beacon handler */
 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;