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authormax <max>2003-03-04 14:04:52 (UTC)
committer max <max>2003-03-04 14:04:52 (UTC)
commit3adca473d5440b00e15781627e00465350e9118b (patch) (side-by-side diff)
treee60e57f10c8297eee39f9e31974f9199013c4930 /noncore/net
parent7cf53b4030437bdbd405b8b16684ba9f68e2891d (diff)
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start_sniff
Diffstat (limited to 'noncore/net') (more/less context) (ignore whitespace changes)
-rw-r--r--noncore/net/wellenreiter/daemon/source/daemon.cc27
-rw-r--r--noncore/net/wellenreiter/libwellenreiter/source/cardmode.cc59
-rw-r--r--noncore/net/wellenreiter/libwellenreiter/source/cardmode.hh6
-rw-r--r--noncore/net/wellenreiter/libwellenreiter/source/sniff.cc71
-rw-r--r--noncore/net/wellenreiter/libwellenreiter/source/sniff.hh5
-rw-r--r--noncore/net/wellenreiter/libwellenreiter/source/wl_types.hh1
6 files changed, 135 insertions, 34 deletions
diff --git a/noncore/net/wellenreiter/daemon/source/daemon.cc b/noncore/net/wellenreiter/daemon/source/daemon.cc
index 3a28217..b840f17 100644
--- a/noncore/net/wellenreiter/daemon/source/daemon.cc
+++ b/noncore/net/wellenreiter/daemon/source/daemon.cc
@@ -11,6 +11,7 @@
#define MAXCHANNEL 13
#define CHANINTERVAL 500000
+
/* Main function of wellenreiterd */
int main(int argc, char **argv)
{
@@ -18,7 +19,7 @@ int main(int argc, char **argv)
char buffer[WL_SOCKBUF];
struct pcap_pkthdr header;
struct sockaddr_in saddr;
- pcap_t *handletopcap;
+// pcap_t *handletopcap;
wl_cardtype_t cardtype;
pthread_t sub;
const unsigned char *packet;
@@ -40,26 +41,14 @@ int main(int argc, char **argv)
if(cardtype.type < 1 || cardtype.type > 4)
usage();
- /* set card into monitor mode */
- if(!card_into_monitormode(&handletopcap, cardtype.iface,
- cardtype.type))
+ /* Until we do not act as a read daemon, it starts the sniffer
+ right after startup */
+ if (!start_sniffer(cardtype.iface,cardtype.type))
{
- wl_logerr("Cannot initialize the wireless-card, aborting");
- exit(EXIT_FAILURE);
+ wl_logerr("daemon, start_sniff did not return proper, aborting");
+ exit(EXIT_FAILURE);
}
- wl_loginfo("Set card into monitor mode");
-
- /* setup pcap */
- if((handletopcap = pcap_open_live(cardtype.iface,
- BUFSIZ, 1, 0, NULL)) == NULL)
- {
- wl_logerr("pcap_open_live() failed: %s", strerror(errno));
- exit(EXIT_FAILURE);
- }
-
-#ifdef HAVE_PCAP_NONBLOCK
- pcap_setnonblock(handletopcap, 1, NULL);
-#endif
+ wl_loginfo ("daemon, wireless card prepared for sniffing");
/* Setup socket for incoming commands */
if((sock=wl_setupsock(DAEMONADDR, DAEMONPORT, saddr)) < 0)
diff --git a/noncore/net/wellenreiter/libwellenreiter/source/cardmode.cc b/noncore/net/wellenreiter/libwellenreiter/source/cardmode.cc
index 7c9fbc4..4f187c0 100644
--- a/noncore/net/wellenreiter/libwellenreiter/source/cardmode.cc
+++ b/noncore/net/wellenreiter/libwellenreiter/source/cardmode.cc
@@ -6,9 +6,9 @@
#include "cardmode.hh"
#include "wl_log.hh"
-
+pcap_t *handletopcap;
/* main card into monitor function */
-int card_into_monitormode (pcap_t **orighandle, const char *device, int cardtype)
+int card_into_monitormode (const char *device, int cardtype)
{
char CiscoRFMON[35] = "/proc/driver/aironet/";
FILE *CISCO_CONFIG_FILE;
@@ -152,6 +152,51 @@ int card_check_rfmon_datalink (const char *device)
}
}
+/* Ipaq running familiar does not have a loopback device, we need one */
+int check_loopback()
+{
+ /* Checking for a loopback interface with 127.0.0.1, otherwise the other stuff seems to fail on
+ familiar linux on ipaq's */
+ int err;
+ /* First generate a socket to use with iocalls */
+ int fd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (fd < 0)
+ {
+ /* In case of an error */
+ wl_logerr("check_loopback, generation of a socket failed, cannot continue");
+ return 0;
+ }
+ /* Fill an empty an interface structure with the right flags (UP and Promsic) */
+ struct ifreq ifr;
+ strncpy(ifr.ifr_name, "lo",3);
+
+ /* Get the interface flags, loopback interfaces can be detected that way */
+ err = ioctl(fd, SIOCGIFFLAGS, &ifr);
+ if (err < 0)
+ {
+ wl_logerr("check_loopback, could not get the flags of lo, check if you got a lo loopback interface, cannot continue");
+ close(fd);
+ return 0;
+ }
+ /* Checking the flags for IFF_LOOPBACK flags */
+ if(ifr.ifr_flags && IFF_LOOPBACK)
+ {
+ /* Yes, we do have a loopback interface....sup! */
+ close(fd);
+ wl_loginfo ("check_loopback, check for loopback interface lo successful");
+ return 1;
+ }
+ else
+ {
+ wl_logerr("check_loopback, did not found an interface lo with the IFF_LOOPBACK flag set, cannot continue");
+ close(fd);
+ return 0;
+ }
+ /* Should never be reached */
+ return 0;
+} /*check_loopback */
+
+
/* Set card into promisc mode */
int card_set_promisc_up (const char *device)
{
@@ -215,16 +260,6 @@ int card_remove_promisc (const char *device)
/* Fill an empty an interface structure with the right flags (UP and Promsic) */
struct ifreq ifr;
-/* strncpy(ifr.ifr_name, device,10);
- ifr.ifr_flags = IFF_UP + IFF_PROMISC;
- err = ioctl(fd, SIOCSIFFLAGS, &ifr);
- if (err < 0)
- {
- perror("Could not access the interface, ");
- close(fd);
- return 0;
- }
- */
/* Get the flags from the interface*/
strncpy(ifr.ifr_name, device,10);
err = ioctl(fd, SIOCGIFFLAGS, &ifr);
diff --git a/noncore/net/wellenreiter/libwellenreiter/source/cardmode.hh b/noncore/net/wellenreiter/libwellenreiter/source/cardmode.hh
index 58e99ac..73e0ae1 100644
--- a/noncore/net/wellenreiter/libwellenreiter/source/cardmode.hh
+++ b/noncore/net/wellenreiter/libwellenreiter/source/cardmode.hh
@@ -38,6 +38,8 @@ extern "C"
#include <pcap.h>
}
+extern pcap_t *handletopcap;
+
/* Defines, used for the card setup */
#define DEFAULT_PATH "/proc/driver/aironet/%s/Config"
#define CISCO_STATUS "/proc/driver/aironet/%s/Status"
@@ -58,7 +60,8 @@ extern "C"
/* Prototypes */
int card_check_rfmon_datalink (const char *device);
-int card_into_monitormode (pcap_t **, const char *, int);
+int card_into_monitormode (const char *, int);
+int check_loopback();
int card_set_promisc_up (const char *device);
int card_remove_promisc (const char *device);
int card_set_channel (const char *device, int channel,int cardtype);
@@ -67,7 +70,6 @@ double iw_freq2float(iw_freq * in);
void iw_float2freq(double in, iw_freq * out);
int card_detect_channels (char * device);
-
/*------------------------------------------------------------------*/
/*
* Wrapper to push some Wireless Parameter in the driver
diff --git a/noncore/net/wellenreiter/libwellenreiter/source/sniff.cc b/noncore/net/wellenreiter/libwellenreiter/source/sniff.cc
index 6e512c4..0616a7e 100644
--- a/noncore/net/wellenreiter/libwellenreiter/source/sniff.cc
+++ b/noncore/net/wellenreiter/libwellenreiter/source/sniff.cc
@@ -10,6 +10,77 @@
#include "wl_log.hh"
#include "wl_types.hh"
#include "wl_proto.hh"
+#include "cardmode.hh"
+
+int start_sniffer(const char *device, int cardtype )
+{
+
+ /* This function initialize the sniffing
+ 1. Check for lo interface
+ 2. bring it into promsicous mode and UP
+ 3. bring device into rfmon mode
+ start the pcap sniffing process.
+ */
+
+ /* Do we have the device name ? */
+ if(device == NULL)
+ {
+ wl_logerr("start_sniffer, parameter \"device\" is empty, please check your config");
+ return 0;
+ }
+
+ /* Some Linux System does not have a loopback device lo with 127.0.0.1 so sockets could
+ not made correctly, let the proggie check that and proceed only if it exists. */
+ if (!check_loopback())
+ {
+ wl_logerr("start_sniffer, check_loopback failed, cannot continue without a loopback");
+ return 0;
+ }
+
+ /* Set the card into regulary promiscous mode first and set the UP flag, in case no ip
+ was given. It would work without the promisc flags but i dont like this */
+ if (!card_set_promisc_up(device))
+ {
+ wl_logerr("start_sniffer, card_set_promisc_up failed, cannot continue");
+ return 0;
+ }
+
+ /* Set card into the rfmon/monitoring mode */
+ if (!card_into_monitormode(device,cardtype))
+ {
+ wl_logerr("start_sniffer, cannot put wireless card into monitoring mode, aborting");
+ return 0;
+ }
+
+ /* setup pcap handle, used for the packet decoding etc. */
+ if((handletopcap = pcap_open_live((char *) device, BUFSIZ, 1, 0, NULL)) == NULL)
+ {
+ wl_logerr("pcap_open_live() failed: %s", strerror(errno));
+ return 0;
+ }
+
+#ifdef HAVE_PCAP_NONBLOCK
+ pcap_setnonblock(handletopcap, 1, NULL);
+#endif
+ return 1;
+}
+
+
+int stop_sniffer(const char *device, int cardtype)
+{
+ /* This function terminates the sniffing
+ 1. get the device state
+ 2. remove the rfmon state
+ 3. Remove the promisc state
+ start the pcap sniffing process.
+
+ */
+
+ /* Do we really have at least a lo interface with the 127.0.0.1 ? */
+ return 0;
+
+}
+
/* Main function, checks packets */
void process_packets(const struct pcap_pkthdr *pkthdr,
diff --git a/noncore/net/wellenreiter/libwellenreiter/source/sniff.hh b/noncore/net/wellenreiter/libwellenreiter/source/sniff.hh
index c7108ac..a4cf4b7 100644
--- a/noncore/net/wellenreiter/libwellenreiter/source/sniff.hh
+++ b/noncore/net/wellenreiter/libwellenreiter/source/sniff.hh
@@ -40,11 +40,14 @@ struct packetinfo
int ssid_len;
};
+/* Function definitions */
+/* Used for stoping and starting the sniffer process */
+int start_sniffer(const char *device, int cardtype);
+int stop_sniffer(const char *device, int cardtype);
void process_packets(const struct pcap_pkthdr* pkthdr,const u_char* packet, char *, int);
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);
-
int GetHeaderLength(u_int16_t fc);
/*
diff --git a/noncore/net/wellenreiter/libwellenreiter/source/wl_types.hh b/noncore/net/wellenreiter/libwellenreiter/source/wl_types.hh
index cd482fe..afc105c 100644
--- a/noncore/net/wellenreiter/libwellenreiter/source/wl_types.hh
+++ b/noncore/net/wellenreiter/libwellenreiter/source/wl_types.hh
@@ -38,5 +38,6 @@ typedef struct {
#define WL_CONFFILE "sample.conf"
#define WL_CONFBUFF 128
+
#endif /* WL_TYPES_HH */