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

todo: communication protocol with GUI and implementation of sniffer

1 files changed, 83 insertions, 0 deletions

diff --git a/noncore/net/wellenreiter/daemon/source/sniffer.hh b/noncore/net/wellenreiter/daemon/source/sniffer.hh
new file mode 100644
index 0000000..7f45be6
--- a/dev/null
+++ b/noncore/net/wellenreiter/daemon/source/sniffer.hh
@@ -0,0 +1,83 @@
+/* $Id$ */
+
+#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>
+
+#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 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);
+
+/*
+ * 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))
+
+#endif /* SNIFFER_HH */