pre-alpha version, most things does not work yet.

todo: communication protocol with GUI and implementation of sniffer

16 files changed, 437 insertions, 93 deletions

diff --git a/noncore/net/wellenreiter/daemon/source/Makefile b/noncore/net/wellenreiter/daemon/source/Makefile
new file mode 100644
index 0000000..dc459af
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/Makefile
@@ -0,0 +1,31 @@
+# $Id$
+
+        CPP       = g++
+
+        CFLAGS=
+        OPTIMFLAGS= -g
+        WARNFLAGS= -Wall  -pedantic -DDEBUG
+        LDFLAGS         = 
+        LIBS    = -lpcap
+        OBJ     = daemon.o log.o sendgui.o getgui.o sniffer.o
+
+.SUFFIXES:
+        .PHONY:         all wellenreiterd clean distclean realclean
+
+%.o : %.cc
+        $(CPP) $(CFLAGS) $(WARNFLAGS) $(OPTIMFLAGS) -c $< -o $@
+
+        all:wellenreiterd
+
+        wellenreiterd:$(OBJ)
+        $(CPP) $(OPTIMFLAGS) $(WARNFLAGS) $(CFLAGS) $(OBJ) $(LDFLAGS) $(LIBS) -o $@
+        @echo Build wellenreiterd
+
+clean distclean realclean:
+        @rm -rf wellenreiterd *~ *.o
+        @echo All dependent files have been removed.
+
+        wellenreiterd.o:config.hh
+        serve.o:        config.hh
+        log.o:          config.hh
+        sendgui.o:      config.hh
diff --git a/noncore/net/wellenreiter/daemon/source/README b/noncore/net/wellenreiter/daemon/source/README
deleted file mode 100644
index 249d950..0000000
--- a/noncore/net/wellenreiter/daemon/source/README
+++ b/dev/null
@@ -1,5 +0,0 @@
-compile it using:
-
-gcc -o sniffer ./sniffer.c -lpcap
-
-
diff --git a/noncore/net/wellenreiter/daemon/source/TODO b/noncore/net/wellenreiter/daemon/source/TODO
new file mode 100644
index 0000000..39b1a05
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/TODO
@@ -0,0 +1,5 @@
+implement communication protocol
+security analysis
+implement sniffer (last step)
+security analysis
+code cleanup
\ No newline at end of file
diff --git a/noncore/net/wellenreiter/daemon/source/config.hh b/noncore/net/wellenreiter/daemon/source/config.hh
new file mode 100644
index 0000000..b124f41
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/config.hh
@@ -0,0 +1,22 @@
+/*
+ *
+ * Global configuration for wellenreiter
+ *
+ * $Id$
+ *
+ * Written by Martin J. Muench <mjm@codito.de>
+ *
+ */
+
+#ifndef CONFIG_HH
+#define CONFIG_HH
+
+#define PROGNAME "wellenreiter"  /* Name of program (for syslog et.al.) */
+#define VERSION  "0.2"           /* Version of wellenreiter             */
+
+#define DAEMONPORT    37772            /* Port of Daemon                           */
+
+#define GUIADDR  "127.0.0.1"     /* Adress of GUI, later specified in configfile */
+#define GUIPORT  37773          /* Port of GUI, "   " */
+
+#endif /* CONFIG_HH */
diff --git a/noncore/net/wellenreiter/daemon/source/daemon.cc b/noncore/net/wellenreiter/daemon/source/daemon.cc
new file mode 100644
index 0000000..7972c0f
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/daemon.cc
@@ -0,0 +1,82 @@
+/*
+ * Startup functions of wellenreiter
+ *
+ * $Id$
+ */
+
+#include "config.hh"
+#include "daemon.hh"
+#include "log.hh"
+#include "sendgui.hh"
+#include "getgui.hh"
+
+/* Main function of wellenreiterd */
+int main(int argc, char **argv)
+{
+  int sock, maxfd;
+  struct sockaddr_in *cliaddr;
+  socklen_t len=sizeof(struct sockaddr);
+  char buffer[128];
+  FILE *fp=stdin; /* Will be replaced with sniffer */
+  fd_set rset;
+
+  fprintf(stderr, "wellenreiterd %s\n\n", VERSION);
+
+  /* Setup socket for incoming commands */
+  if(!commsock(&sock))
+    return 0;
+
+  log_info("Set up socket '%d' for GUI communication", sock);
+
+  FD_ZERO(&rset);
+
+  /* Start main loop */
+  log_info("Starting main loop");
+  while(1)
+  {
+
+    FD_SET(sock, &rset);
+    FD_SET(fileno(fp), &rset);
+    maxfd=sock+fileno(fp)+1;
+    if(select(maxfd, &rset, NULL, NULL, NULL) < 0)
+    {
+      log_err("Error calling select: %s", strerror(errno));
+      break;
+    }     
+
+    /* Got data on local socket from GUI */
+    if(FD_ISSET(sock, &rset))
+    {
+      memset(buffer, 0, sizeof(buffer));
+      if(recvfrom(sock, buffer, sizeof(buffer)-1, 0, (struct sockaddr *)cliaddr, &len) < 0)
+      {
+         log_err("Cannot read from socket: %s", strerror(errno));
+         break;
+      }
+      log_info("Received command from '%s': %s", inet_ntoa(cliaddr->sin_addr), buffer); 
+
+      /* Pass string to analyze function */
+      commstring(buffer);
+
+    }
+
+    /* Will be replaced with sniffer ... later */
+    if(FD_ISSET(fileno(fp), &rset))
+    {
+      memset(buffer, 0, sizeof(buffer));
+      if(fgets(buffer, sizeof(buffer) - 1, fp) == NULL)
+      {
+         log_err("Cannot read from stdin: %s", strerror(errno));
+         break;
+      }
+
+      /* Send string to GUI */
+      sendgui("%d: %s", 1234, buffer);
+
+    }
+
+  }
+
+  close(sock);
+  return 0;
+}
diff --git a/noncore/net/wellenreiter/daemon/source/daemon.hh b/noncore/net/wellenreiter/daemon/source/daemon.hh
new file mode 100644
index 0000000..6776d37
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/daemon.hh
@@ -0,0 +1,16 @@
+/* $Id$ */
+
+#ifndef DAEMON_HH
+#define DAEMON_HH
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <errno.h>
+
+#endif /* DAEMON_HH */ 
diff --git a/noncore/net/wellenreiter/daemon/source/extract.h b/noncore/net/wellenreiter/daemon/source/extract.hh
index c1bcdcd..21dcffa 100644
--- a/noncore/net/wellenreiter/daemon/source/extract.h
+++ b/noncore/net/wellenreiter/daemon/source/extract.hh
@@ -1,6 +1,7 @@
+/* $Id */
 /*
  * 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
@@ -14,18 +15,18 @@
  * 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 */
 
+#ifndef EXTRACT_HH
+#define EXTRACT_HH
+
 #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 | \
@@ -52,6 +53,8 @@
                      (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)))
+
+#endif /* EXTRACT_HH */
diff --git a/noncore/net/wellenreiter/daemon/source/getgui.cc b/noncore/net/wellenreiter/daemon/source/getgui.cc
new file mode 100644
index 0000000..f56f40b
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/getgui.cc
@@ -0,0 +1,43 @@
+/*
+ * Setup UDP socket for commands
+ * Misc wrapper functions for incoming commands
+ *
+ * $Id$
+ */
+
+#include "config.hh"
+#include "getgui.hh"
+#include "log.hh"
+
+struct sockaddr_in saddr;
+
+/* Setup UDP Socket for incoming commands */
+int commsock(int *sock)
+{
+
+  if((*sock=socket(AF_INET, SOCK_DGRAM, 0)) < 0)
+  {
+    log_err("Cannot set up socket: %s", strerror(errno));
+    return 0;
+  }
+
+  memset(&saddr, 0, sizeof(saddr));
+  saddr.sin_family = PF_INET;
+  saddr.sin_port = htons(DAEMONPORT);
+  saddr.sin_addr.s_addr = htonl(INADDR_ANY);
+ 
+  if(bind(*sock,(struct sockaddr *)&saddr, sizeof(saddr)) < 0)
+  {
+    log_err("Cannot bind socket: %s", strerror(errno));
+    close(*sock);
+    return 0;
+  }
+
+  return 1;
+}
+
+int commstring(const char *input)
+{
+
+  return 1;
+}
diff --git a/noncore/net/wellenreiter/daemon/source/getgui.hh b/noncore/net/wellenreiter/daemon/source/getgui.hh
new file mode 100644
index 0000000..f5a37f9
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/getgui.hh
@@ -0,0 +1,16 @@
+/* $id */
+
+#ifndef GETGUI_HH
+#define GETGUI_HH
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+int commsock(int *);
+int commstring(const char *);
+
+#endif /* GETGUI_HH */
diff --git a/noncore/net/wellenreiter/daemon/source/ieee802_11.h b/noncore/net/wellenreiter/daemon/source/ieee802_11.hh
index 497e6ed..3cc5343 100644
--- a/noncore/net/wellenreiter/daemon/source/ieee802_11.h
+++ b/noncore/net/wellenreiter/daemon/source/ieee802_11.hh
@@ -1,7 +1,7 @@
-/* @(#) $Header$ (LBL) */
+/* $Id$ */
 /*
  * Copyright (c) 2001
          *Fortress Technologies
  *      Charlie Lenahan ( clenahan@fortresstech.com )
  *
  * Redistribution and use in source and binary forms, with or without
@@ -18,12 +18,15 @@
  * 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.
  */
 
+#ifndef IEEE802_11_HH
+#define IEEE802_11_HH
+
         #define IEEE802_11_FC_LEN2
 
 #define T_MGMT 0x0  /* management */
 #define T_CTRL 0x1  /* control */
 #define T_DATA 0x2 /* data */
 #define T_RESV 0x3  /* reserved */
@@ -240,6 +243,8 @@ struct ctrl_end_ack_t {
 
         #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)
+
+#endif /* IEEE802_11_HH */
diff --git a/noncore/net/wellenreiter/daemon/source/log.cc b/noncore/net/wellenreiter/daemon/source/log.cc
new file mode 100644
index 0000000..47589d2
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/log.cc
@@ -0,0 +1,52 @@
+/*
+ * Small functions to log to syslog
+ *
+ * $Id$
+ */
+
+#include "config.hh"
+#include "log.hh"
+
+/* Log to syslog INFO */
+void log_info(const char *fmt,...) 
+{
+
+  char buffer[4096];
+  va_list ap;
+
+  memset(buffer, 0, sizeof(buffer)),
+  va_start(ap, fmt);
+  vsnprintf(buffer, sizeof(buffer)-1, fmt, ap);
+  va_end(ap);
+  
+  openlog(PROGNAME, LOG_PID, LOG_SYSLOG);
+  syslog(LOG_INFO, "(info) %s", buffer);
+  closelog();
+
+#ifdef DEBUG
+  fprintf(stderr, "(info) %s\n", buffer);
+#endif
+
+}
+
+/* Log to syslog ERR */
+void log_err(const char *fmt,...) 
+{
+
+  char buffer[4096];
+  va_list ap;
+
+  memset(buffer, 0, sizeof(buffer));
+  va_start(ap, fmt);
+  vsnprintf(buffer, sizeof(buffer)-1, fmt, ap);
+  va_end(ap);
+
+  openlog(PROGNAME, LOG_PID, LOG_SYSLOG);
+          syslog(LOG_INFO, "(err) %s", buffer); 
+  closelog();
+
+#ifdef DEBUG
+  fprintf(stderr, "(err) %s\n", buffer);
+#endif        
+
+}
diff --git a/noncore/net/wellenreiter/daemon/source/log.hh b/noncore/net/wellenreiter/daemon/source/log.hh
new file mode 100644
index 0000000..bdea7e4
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/log.hh
@@ -0,0 +1,14 @@
+/* $Id$ */
+
+#ifndef LOG_HH
+#define LOG_HH
+
+#include <stdio.h>
+#include <syslog.h>
+#include <stdarg.h>
+#include <string.h>
+
+void log_info(const char *, ...);
+void log_err(const char *, ...);
+
+#endif /* LOG_HH */
diff --git a/noncore/net/wellenreiter/daemon/source/sendgui.cc b/noncore/net/wellenreiter/daemon/source/sendgui.cc
new file mode 100644
index 0000000..48ad5b8
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/sendgui.cc
@@ -0,0 +1,75 @@
+/* 
+ * Send string to GUI
+ *
+ * $Id$ 
+ */
+
+#include "config.hh"
+#include "sendgui.hh"
+#include "log.hh"
+
+/* Simple dummy for alarm timer */
+static void alarmdummy(int signo) 
+{ 
+  alarm (0);
+}
+
+/* Connect to given IP on given port */
+int connect_server(int *sock, unsigned int ipaddr, int port) 
+{
+  struct sockaddr_in saddr;
+  int retval=0;
+
+  *sock = socket (PF_INET, SOCK_STREAM, 0);
+  saddr.sin_family = PF_INET;
+  saddr.sin_port = htons (port);
+  saddr.sin_addr.s_addr = ipaddr;
+
+  signal (SIGALRM, alarmdummy);
+  siginterrupt (SIGALRM, 1);
+  
+  alarm(5);
+  retval=connect (*sock, (struct sockaddr *) &saddr, sizeof (saddr));
+  alarm(0);
+  
+  if(retval < 0)
+  {
+    close (*sock);
+    return 0;
+  }
+
+ return 1;
+}
+
+/* Send a string to the GUI */
+int sendgui(const char *string, ...) 
+{
+  int sock=0;
+  char buffer[4096];
+  va_list ap;
+
+  /* Generate string */
+  memset(buffer, 0, sizeof(buffer));
+  va_start(ap, string);
+  vsnprintf(buffer, sizeof(buffer)-1, string, ap);
+  va_end(ap);
+
+  if(!connect_server(&sock, inet_addr(GUIADDR), GUIPORT)) 
+  {
+    log_err("Connect to GUI at '%s' failed: %s", GUIADDR, strerror(errno));
+    return 0;
+  }
+
+  if(write(sock, buffer, sizeof(buffer)) < 0)
+  {
+    log_err("Cannot write to socket: %s", strerror(errno));
+    close(sock);
+    return 0;
+  }
+
+  if(close(sock) < 0)
+    log_err("Cannot close socket: %s", strerror(errno));
+
+  return 1;
+}
+
diff --git a/noncore/net/wellenreiter/daemon/source/sendgui.hh b/noncore/net/wellenreiter/daemon/source/sendgui.hh
new file mode 100644
index 0000000..e083704
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/sendgui.hh
@@ -0,0 +1,20 @@
+/* $Id$ */
+
+#ifndef SENDGUI_HH
+#define SENDGUI_HH
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <signal.h>
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+int connect_server(int *, unsigned int, int);
+int sendgui(const char *string, ...);
+
+#endif /* SENDGUI_HH */
diff --git a/noncore/net/wellenreiter/daemon/source/sniffer.c b/noncore/net/wellenreiter/daemon/source/sniffer.cc
index 31a5d13..c837505 100644
--- a/noncore/net/wellenreiter/daemon/source/sniffer.c
+++ b/noncore/net/wellenreiter/daemon/source/sniffer.cc
@@ -1,46 +1,42 @@
-/* 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 sniffer.c -o wlan-sniffer -lpcap
-
-*/
-#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);
-        }
+/* 
+ *  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 "sniffer.hh"
+#include "ieee802_11.hh"
+#include "extract.hh"
+
+int sniffer(void)
+        {
+        if(card_into_monitormode (SNIFFER_DEVICE, CARD_TYPE_NG) < 0)
+                return 0;
                 start_sniffing (SNIFFER_DEVICE);
 
-  return 0;
+  return 1;
 }
 
-int card_into_monitormode (char * device, int cardtype)
+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);
+                return 0;
     }
 
         /* Setting the prmiscous and up flag to the interface */
         if (card_set_promisc_up (device) == 0)
         {
                 printf ("Interface flags correctly set using ifconfig\n");
@@ -58,16 +54,16 @@ int card_into_monitormode (char * device, int cardtype)
                 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)
+                if (system (wlanngcmd) != 0)
                 {
                         printf ("\n Fatal error could not set %s in raw mode, check cardtype\n",device);
-                        exit(1);
+                        return 0;
             }
         }
         else if (cardtype == CARD_TYPE_HOSTAP)
         {
                 printf ("Got a host-ap card, nothing is implemented now\n");
         }
@@ -79,70 +75,66 @@ int card_into_monitormode (char * device, int cardtype)
         /* 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);
+                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);
+                pcap_close(handle); 
+                return 0;
         }
 }
 
 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;
         }
-        return(0);
+        return 1;
 }
 
 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);
+        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);
+        pcap_loop(handletopcap,-1,process_packets,NULL);
 
-    printf("\nDone processing packets... wheew!\n");
-    return 0;
+        printf("\nDone processing packets... wheew!\n");
+        return 1;
 }
 
 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;
@@ -260,23 +252,21 @@ void process_packets(u_char *useless,const struct pcap_pkthdr* pkthdr,const u_ch
 
 
 /* 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);
+        return 0;
 }
 
 
 void etheraddr_string(register const u_char *ep,char * text)
 {
         static char hex[] = "0123456789abcdef";
@@ -292,13 +282,12 @@ void etheraddr_string(register const u_char *ep,char * text)
                 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;
@@ -325,19 +314,19 @@ int handle_beacon(u_int16_t fc, const u_char *p,struct packetinfo *ppinfo)
                         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)
+                                        if (strcmp((char *)pbody.ssid.ssid,"")==0)
                                         {
                                                 ppinfo->ssid = NONBROADCASTING;
                                         }
                                         else
                                         {
-                                                ppinfo->ssid = pbody.ssid.ssid;
+                                                ppinfo->ssid = (char *)pbody.ssid.ssid;
                                         }
                                         ppinfo->ssid_len = pbody.ssid.length;
                                 }
                                 break;
                         case E_CHALLENGE:
                                 memcpy(&(pbody.challenge),p+offset,2); offset += 2;
@@ -367,23 +356,18 @@ int handle_beacon(u_int16_t fc, const u_char *p,struct packetinfo *ppinfo)
                                 {
                                         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);
-
-
-
+        return 1;
         
 } /* End of handle_beacon */
 
 
 static int GetHeaderLength(u_int16_t fc)
 {
diff --git a/noncore/net/wellenreiter/daemon/source/sniffer.h b/noncore/net/wellenreiter/daemon/source/sniffer.hh
index b880b68..7f45be6 100644
--- a/noncore/net/wellenreiter/daemon/source/sniffer.h
+++ b/noncore/net/wellenreiter/daemon/source/sniffer.hh
@@ -1,19 +1,20 @@
-// Wellenreiter-sniffer-code header file
+/* $Id$ */
+
+#ifndef SNIFFER_HH
+#define SNIFFER_HH
 
 #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_CISCO1
         #define   CARD_TYPE_NG2
         #define   CARD_TYPE_HOSTAP3
 
@@ -44,46 +45,24 @@ struct packetinfo
                 char *ssid;
         int ssid_len;
 };
 
 
 /* Prototypes */
-int card_into_monitormode (char * device, int cardtype);
 
+int sniffer(void);
+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.
  *
@@ -97,6 +76,8 @@ static const char *subtype_text[]={
 
 /* 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))
+
+#endif /* SNIFFER_HH */