int ip_init()
{
set_my_ipaddr();
set_real_ip_addresses();
create_sending_socket();
create_listening_socket();
check_packet_logging();
packet_loss = get_percentage_env("PACKET_LOSS");
packet_corruption = get_percentage_env("PACKET_CORRUPTION");
if (my_ipaddr)
return 1;
return 0;
}
void
setup_receiver(struct receiver_arg* arg, int* s, unsigned char** payload,
int payload_len, struct msghdr* msg, struct iovec* entry,
struct control* control, struct sockaddr_in* from_addr)
{
arg->inf_index = inf_to_index(arg->dev);
arg->send_sfd = create_sending_socket(arg->dev, &(arg->sk));
*payload = malloc(payload_len);
if (NULL == payload){
printf("malloc failed\n");
exit(1);
}
memset(*payload, 0, payload_len);
*s = create_recv_rawsocket_ts(arg->dev);
set_promisc(arg->dev, *s);
setup_raw_msghdr(msg, entry,
control, *payload,
payload_len, from_addr);
}
/*
* Append the DRTT to the payload
* and send packet. The kernel will
* attach the timestamp along the way.
*/
void
send_cntp_packet()
{
unsigned char *pkt = malloc(C_HLEN + TIMESTAMP_LEN);
memset(pkt, 0, C_HLEN + TIMESTAMP_LEN);
struct sockaddr_ll sk;
int send_sock_fd = create_sending_socket(globals.sender_inf, &sk);
populate_header(globals.dest_node, globals.dest_node,
globals.src_node, CNTP_PORT, &pkt);
struct timestamp *drtt_st = (struct timestamp *)(pkt + C_HLEN);
drtt_st->sec = 0;
drtt_st->fsec = atoi(globals.drtt);
send_packet(send_sock_fd, &sk, pkt, C_HLEN + TIMESTAMP_LEN);
print_drtt_packet_net(pkt);
print_timestamp((struct timestamp*)(pkt + C_HLEN));
}
