int processpacket(short* packet, size_t* packetindex, unsigned short* packetcount)
{
if(!(IS_BYTE_1(packet[0])))
{
(*packetindex)--;//throw out packet
}
if((*packetindex) == 3)
{
display_packet(packet);
(*packetindex)=0;
(*packetcount)++;
}
return 0;
}
static void
on_packet_selected (GtkTreeSelection *selection, gpointer user_data)
{
GtkTreeModel *model;
GtkTreeIter iter;
time_t *arrival_time;
if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
SoupMessageHeaders *packet_headers;
gtk_tree_model_get (model,
&iter,
4, &packet_headers,
5, &arrival_time, -1);
display_packet (*arrival_time, packet_headers);
g_boxed_free (SOUP_TYPE_MESSAGE_HEADERS, packet_headers);
}
else
update_packet_details ("", 0);
}
int main( int argc, char *argv[] )
{
/*target address*/
struct sockaddr_ll socket_address;
/*buffer for ethernet frame*/
void* buffer = (void*)malloc(ETH_FRAME_LEN);
/*pointer to ethenet header*/
unsigned char* etherhead = buffer;
/*userdata in ethernet frame*/
unsigned char* data = buffer + 14;
/*another pointer to ethernet header*/
struct ethhdr *eh = (struct ethhdr *)etherhead;
int send_result = 0;
/*our MAC address*/ /* eth0: 00:1B:21:5D:35:14 */
unsigned char src_mac[6] = {0x00, 0x1B, 0x21, 0x5D, 0x35, 0x14};
/*other host MAC address*/
unsigned char dest_mac[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
int i, j, n;
int sock, pkt_num; // for socket-ID and packet-number
// allow user to modify the default number of packets to accept
for (i = 1; i+1 < argc; i++)
if ( strncmp( argv[ i ], "-c", 3 ) == 0 )
packet_limit = atoi( argv[ i+1 ] );
// create an unnamed socket for reception of ethernet packets
sock = socket( PF_PACKET, SOCK_RAW, htons( ETH_P_ALL ) );
if ( sock < 0 ) { perror( "socket" ); exit( 1 ); }
printf ("Foo! Index is: %d\n", get_netdev_index (sock, argc, argv));
/*prepare sockaddr_ll*/
/*RAW communication*/
socket_address.sll_family = PF_PACKET;
/*we don't use a protocoll above ethernet layer
->just use anything here*/
socket_address.sll_protocol = htons(ETH_P_ALL);
/*index of the network device
see full code later how to retrieve it*/
socket_address.sll_ifindex = get_netdev_index (sock, argc, argv);
printf ("Selected device index is: %d\n", get_netdev_index (sock, argc, argv));
/*ARP hardware identifier is ethernet*/
/*
socket_address.sll_hatype = ARPHRD_ETHER;
*/
/*target is another host*/
socket_address.sll_pkttype = PACKET_OTHERHOST;
/*address length*/
socket_address.sll_halen = ETH_ALEN;
/*MAC - begin*/
socket_address.sll_addr[0] = 0xFF;
socket_address.sll_addr[1] = 0xFF;
socket_address.sll_addr[2] = 0xFF;
socket_address.sll_addr[3] = 0xFF;
socket_address.sll_addr[4] = 0xFF;
socket_address.sll_addr[5] = 0xFF;
/*MAC - end*/
socket_address.sll_addr[6] = 0x00;/*not used*/
socket_address.sll_addr[7] = 0x00;/*not used*/
/*set the frame header*/
memcpy((void*)buffer, (void*)dest_mac, ETH_ALEN);
memcpy((void*)(buffer+ETH_ALEN), (void*)src_mac, ETH_ALEN);
eh->h_proto = 0x00;
/*fill the frame with some data*/
for (j = 0; j < 1500; j++) {
data[j] = (unsigned char)((int) (255.0*rand()/(RAND_MAX+1.0)));
}
/*send the packet*/
while (1)
{
send_result = sendto(sock, buffer, ETH_FRAME_LEN, 0,
(struct sockaddr*)&socket_address, sizeof(socket_address));
if (send_result == -1)
{
fprintf (stderr, "Error in sendto(): %s\n", strerror(errno));
/* exit (1); */
}
}
#if 0
// main loop to intercept and display the ethernet packets
char hostname[ 64 ], packet[ MAXPKT ];
gethostname( hostname, sizeof( hostname ) );
printf( "\nMonitoring network packets for interface \'%s\'", devname );
printf( " on station \'%s\' \n", hostname );
do {
struct sockaddr_ll saddr = { 0 };
socklen_t slen = sizeof( saddr );
size_t plen = sizeof( packet );
int nbytes;
nbytes = recvfrom( sock, packet, MAXPKT, 0,
(sockaddr*)&saddr, &slen );
if ( saddr.sll_ifindex == ifindex )
display_packet( packet, nbytes, saddr.sll_pkttype );
}
while ( pkt_num < packet_limit );
#endif
}
void dump_packets(void)
{
display_packet(packet);
}
