void ip_response()
{
uint8_t buff[] = {
0x02, 0, 0, 0, 0, 0, //hw
0x02, 1, 1, 1, 1, 1,
0x08, 0x00, //ip
0x45, 0, //header ver/len/frag
0, 36, //len
0, 0, 0, 0,
200, //ttl
0x11, //udp
0x6f, 0x75, //checksum - 0x0000 = ignore
192, 168, 1, 2,
192, 168, 1, 1,
0xfd, 0xe8, 0xfd, 0xe8, //src/dest port
0, 16, //len
0xcf, 0x43, //checksum - 0 = ignore
'h', 'e', 'l', 'l', 'o', '-', 'm', 'e'
};
// write to debug file
write_pcap(buff, sizeof(buff));
(cb_frame_complete)(buff, sizeof(buff));
}
void arp_response( )
{
uint8_t buff[] = {
0x02, 0, 0, 0, 0, 0, //hw
0x02, 1, 1, 1, 1, 1,
0x08, 0x06, //arp
0x00, 0x01, //ether
0x08, 0x00, //arp
0x06, //hw len
0x04, //ip len
0x00, 0x02, //response
0x02, 1, 1, 1, 1, 1, //whoami
192, 168, 1, 2, //whoami
0x02, 0, 0, 0, 0, 0, //youare
192, 168, 1, 1
}; //youare
uint16_t buff_len = 42;
// write to debug file
write_pcap(buff, buff_len);
// send data back
(cb_frame_complete)(buff, buff_len);
}
static void save_network(struct network *n)
{
int i;
write_pcap(_outfd, n->n_beacon, n->n_beaconlen);
for (i = 0; i < 4; i++) {
struct packet *p = &n->n_handshake->c_handshake[i];
if (p->p_len)
packet_write_pcap(_outfd, p);
}
}
static void save_network(const struct network * n)
{
REQUIRE(n != NULL);
int i;
_outfd = open_pcap(_outfilename);
write_pcap(_outfd, n->n_beacon, n->n_beaconlen);
for (i = 0; i < 4; i++)
{
struct packet * p = &n->n_handshake->c_handshake[i];
ALLEGE(p != NULL); //-V547
if (p->p_len) packet_write_pcap(_outfd, p);
}
}
/** Write to file & decide what response to give **/
RETURN_STATUS send_frame(const uint8_t *buffer, const uint16_t buffer_len)
{
write_pcap(buffer, buffer_len-ETH_CRCLEN);
if(buffer[12] == 0x08 && buffer[13] == 0x06)
{
// only respond to a request
if(buffer[21] == 1)
arp_response();
}
if(buffer[12] == 0x08 && buffer[13] == 0x00)
{
//IP - assume UDP as thats what I'm testing...
ip_response();
}
return SUCCESS;
}
static inline void packet_write_pcap(int fd, const struct packet * p)
{
write_pcap(fd, p->p_data, p->p_len);
}
static void packet_write_pcap(int fd, struct packet *p)
{
write_pcap(fd, p->p_data, p->p_len);
}
