1 files changed, 182 insertions, 0 deletions

diff --git a/other/3wahas/sniff.c b/other/3wahas/sniff.c
new file mode 100644
index 0000000..826638d
--- /dev/null
+++ b/other/3wahas/sniff.c
@@ -0,0 +1,182 @@
+/* zodiac - advanced dns spoofer
+ *
+ * sniffing functions
+ *
+ * by scut
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pcap.h>
+#include <pthread.h>
+#include "common.h"
+#include "network.h"
+#include "packet.h"
+#include "sniff.h"
+#include "3wahas.h"
+
+/* sniff_new
+ *
+ * the only function that should be called from outside. set up sniffing
+ * device, create a new thread, then return.
+ * open `interface' device for sniffing, tell sniffing thread to use
+ * `pq_size' packet queues, available through `pq_list'.
+ * store thread id of new thread in `tid'.
+ *
+ * return 0 if thread creation was successful
+ * return 1 if thread creation failed
+ */
+
+void
+sniff_new (char *interface, char *ip_dst)
+{
+        sniff_info      *sinfo;         /* sniff information structure */
+
+        sinfo = xcalloc (1, sizeof (sniff_info));
+
+        sinfo->ip_dst.s_addr = net_resolve (ip_dst);
+
+        /* open interface
+         */
+        sinfo->device = sniff_open (interface);
+        if (sinfo->device == NULL) {
+                free (sinfo);
+                return;
+        }
+
+        sniff_handle (sinfo);
+        /* successfully created sniffer thread
+         */
+        return;
+}
+
+/* sniff_handle
+ *
+ * the main sniffing thread, fetching packets from the device, then calling
+ * the packet grinder `pq_grind' to process the packets
+ *
+ * should never return except on error or program exit
+ */ 
+
+void *
+sniff_handle (sniff_info *sinfo)
+{
+        int             n;              /* temporary return value */
+        pcap_handler    grinder;        /* pcap handler for the packet grinding function */
+
+        printf ("[phx] hello world from sniff handler\n\n");
+        grinder = (pcap_handler) pq_grind;
+        n = pcap_loop (sinfo->device->pd, -1, grinder, (void *) sinfo);
+
+        if (n == -1) {
+                printf ("[phx] sniff_handle (pcap_loop): %s\n", pcap_geterr (sinfo->device->pd));
+        }
+
+        return (NULL);
+}
+
+/* sniff_open
+ *
+ * open `dev' for sniffing, or just the first sniffable one, if
+ * dev is NULL.
+ *
+ * return NULL on failure
+ * return pointer sniffing device structure on success
+ */
+
+s_dev *
+sniff_open (char *devname)
+{
+        int     n;                              /* temporary return value */
+        s_dev   *device;                        /* sniffing device structure to create */
+        char    errorbuf[PCAP_ERRBUF_SIZE];     /* error buffer for pcap message */
+
+        /* create new sniffing device structure in s_dev
+         */
+        device = xcalloc (1, sizeof (s_dev));
+
+        /* check wether to use the first device or a specified device
+         */
+        if (devname == NULL) {
+                /* due to lame pcap manpage, you should not know that it's static *doh* */
+                device->interface = pcap_lookupdev (errorbuf);
+                if (device->interface == NULL) {
+                        printf ("[phx] sniff_open (pcap_lookupdev): %s\n", errorbuf);
+                        device->error = 1;
+                        return (device);
+                }
+        } else {
+                /* if the interface we have to use is already known just copy it
+                 */
+                device->interface = xstrdup (devname);
+        }
+
+        /* try to open the device found
+         */
+        device->pd = sniff_pcap_open (device->interface);
+        if (device->pd == NULL) {
+                device->error = 1;
+                return (device);
+        }
+
+        /* now query some information about the device and store them into our struct
+         */
+        n = pcap_lookupnet (device->interface, &device->localnet,
+                &device->netmask, errorbuf);
+        if (n == -1) {
+                device->error = 1;
+                return (device);
+        }
+
+        device->linktype = pcap_datalink (device->pd);
+        if (device->linktype == -1) {
+                device->error = 1;
+                return (device);
+        }
+
+        return (device);
+}
+
+/* sniff_pcap_open
+ *
+ * securely wraps the pcap_open_live call to catch any errors
+ *
+ * return NULL on failure
+ * return capture descriptor on succes
+ */
+
+pcap_t *
+sniff_pcap_open (char *device)
+{
+        char    errorbuf[PCAP_ERRBUF_SIZE];     /* error buffer */
+        pcap_t  *pdes = NULL;                   /* packet capture descriptor */
+
+        pdes = pcap_open_live (device, SNAPLEN, PROMISC, READ_TIMEOUT, errorbuf);
+
+        if (pdes == NULL) {
+                printf ("[phx] sniff_pcap_open (pcap_open_live): %s\n", errorbuf);
+                return (NULL);
+        }
+
+        return (pdes);
+}
+
+/* sniff_dev_free
+ *
+ * close and free a sniffing device
+ */
+
+void
+sniff_dev_free (s_dev *device)
+{
+        pcap_close (device->pd);
+        if (device->interface)
+                free (device->interface);
+
+        free (device);
+
+        return;
+}
+