ipv6_addr_t init_threeway_handshake(void)
{
border_syn_packet_t *syn;
msg_t m;
m.content.ptr = NULL;
msg_send(&m, border_get_serial_reader(), 1);
msg_receive(&m);
syn = (border_syn_packet_t *)m.content.ptr;
border_conf_header_t *synack = (border_conf_header_t *)get_serial_out_buffer(0);
ipv6_addr_t addr;
memcpy(&addr, &(syn->addr), sizeof(ipv6_addr_t));
slwin_stat.next_exp = syn->next_seq_num;
slwin_stat.last_frame = syn->next_exp - 1;
slwin_stat.last_ack = slwin_stat.last_frame;
synack->empty = 0;
synack->type = BORDER_PACKET_CONF_TYPE;
synack->conftype = BORDER_CONF_SYNACK;
sending_slot_pid = thread_create(sending_slot_stack, SENDING_SLOT_STACK_SIZE, PRIORITY_MAIN - 1, CREATE_SLEEPING, sending_slot, "sending slot");
flowcontrol_send_over_uart((border_packet_t *)synack, sizeof(border_conf_header_t));
synack_seqnum = synack->seq_num;
return addr;
}
void send_ack(uint8_t seq_num) {
border_packet_t *packet = (border_packet_t *)get_serial_out_buffer(0);
packet->empty = 0;
packet->type = BORDER_PACKET_ACK_TYPE;
packet->seq_num = seq_num;
writepacket((uint8_t *)packet, sizeof (border_packet_t));
}
void multiplex_send_ipv6_over_tty(const struct ip6_hdr *packet)
{
border_l3_header_t *l3_hdr = (border_l3_header_t *)get_serial_out_buffer(0);
size_t packet_size = sizeof(struct ip6_hdr) + packet->ip6_plen;
l3_hdr->empty = 0;
l3_hdr->type = BORDER_PACKET_L3_TYPE;
l3_hdr->ethertype = ETHERTYPE_IPV6;
memcpy(
get_serial_out_buffer(0) + sizeof(border_l3_header_t),
packet,
packet_size
);
flowcontrol_send_over_tty(
(border_packet_t *) l3_hdr,
sizeof(border_l3_header_t) + packet_size
);
}
void multiplex_send_ipv6_over_uart(ipv6_hdr_t *packet)
{
border_l3_header_t *serial_buf;
serial_buf = (border_l3_header_t *)get_serial_out_buffer(0);
serial_buf->empty = 0;
serial_buf->type = BORDER_PACKET_L3_TYPE;
serial_buf->ethertype = BORDER_ETHERTYPE_IPV6;
memcpy(get_serial_in_buffer(0) + sizeof(border_l3_header_t), packet, IPV6_HDR_LEN + packet->length);
flowcontrol_send_over_uart((border_packet_t *) serial_buf, sizeof(border_l3_header_t));
}
void multiplex_send_addr_over_tty(struct in6_addr *addr)
{
border_addr_packet_t *packet = (border_addr_packet_t *)get_serial_out_buffer(0);
packet->empty = 0;
packet->type = BORDER_PACKET_CONF_TYPE;
packet->conftype = BORDER_CONF_IPADDR;
memcpy(
&packet->addr,
addr,
sizeof(struct in6_addr)
);
flowcontrol_send_over_tty(
(border_packet_t *) packet,
sizeof(border_addr_packet_t)
);
}
void multiplex_send_context_over_tty(const border_context_t *context)
{
border_context_packet_t *con_packet = (border_context_packet_t *)get_serial_out_buffer(0);
con_packet->empty = 0;
con_packet->type = BORDER_PACKET_CONF_TYPE;
con_packet->conftype = BORDER_CONF_CONTEXT;
memcpy(
&con_packet->context,
context,
sizeof(border_context_t)
);
flowcontrol_send_over_tty(
(border_packet_t *) con_packet,
sizeof(border_context_packet_t)
);
}
