/*---------------------------------------------------------------------------*/
void
ip64_dhcpc_init(const void *mac_addr, int mac_len)
{
/* Although this is DHCPv4, we explicitly bind the socket to an IPv6
address so that it can operate over the ip64 bridge. */
uip_ip6addr_t v6addr;
uip_ip4addr_t v4addr;
struct uip_udp_conn *conn2;
s.mac_addr = mac_addr;
s.mac_len = mac_len;
s.state = STATE_INITIAL;
uip_ipaddr(&v4addr, 255,255,255,255);
ip64_addr_4to6(&v4addr, &v6addr);
s.conn = udp_new(&v6addr, UIP_HTONS(IP64_DHCPC_SERVER_PORT), NULL);
conn2 = udp_new(NULL, UIP_HTONS(IP64_DHCPC_SERVER_PORT), NULL);
if(s.conn != NULL) {
udp_bind(s.conn, UIP_HTONS(IP64_DHCPC_CLIENT_PORT));
}
if(conn2 != NULL) {
udp_bind(conn2, UIP_HTONS(IP64_DHCPC_CLIENT_PORT));
}
PT_INIT(&s.pt);
}
/**
* Connect to MQTT broker.
*
* N.B. None-blocking call.
*/
mqtt_status_t
mqtt_connect(struct mqtt_connection* conn,
const char* host,
uint16_t port,
uint16_t keep_alive)
{
uip_ip6addr_t ip6addr;
uip_ip4addr_t ip4addr;
uip_ipaddr_t *ipaddr;
ipaddr = &ip6addr;
/* Sanity check */
assert(conn != NULL &&
host != NULL);
/* Check if we are already trying to connect */
if(conn->state > MQTT_CONN_STATE_NOT_CONNECTED) {
return MQTT_STATUS_OK;
}
conn->server_host = host;
conn->keep_alive = keep_alive;
conn->server_port = port;
conn->out_buffer_ptr = conn->out_buffer;
conn->out_packet.qos_state = MQTT_QOS_STATE_NO_ACK;
/* First check if the host is an IP address. If not, try to look it up. */
if(uiplib_ip6addrconv(host, &ip6addr) == 0) {
if(uiplib_ip4addrconv(host, &ip4addr) != 0) {
ip64_addr_4to6(&ip4addr, &ip6addr);
} else {
#if UIP_UDP
ipaddr = mdns_lookup(host);
if(ipaddr == NULL) {
printf("MQTT - Resolving host...\r\n");
mdns_query(host);
conn->state = MQTT_CONN_STATE_DNS_LOOKUP;
return MQTT_STATUS_OK;
}
#else /* UIP_UDP */
DBG("Error looking up hostname when mDNS is not used due to UIP_UDP = 0.");
conn->state = MQTT_CONN_STATE_ERROR;
return MQTT_STATUS_DNS_ERROR;
#endif /* UIP_UDP */
}
}
uip_ipaddr_copy(&(conn->server_ip), ipaddr);
/* Initiate the connection if the IP could be resolved. Otherwise the
* connection will be initiated when the DNS lookup is finished, in the main
* event loop.
*/
process_post(&mqtt_process, mqtt_do_connect_tcp_event, conn);
return MQTT_STATUS_OK;
}
/*---------------------------------------------------------------------------*/
void
ip64_dhcpc_configured(const struct ip64_dhcpc_state *s)
{
uip_ip6addr_t ip6dnsaddr;
printf("DHCP Configured with %d.%d.%d.%d\n",
s->ipaddr.u8[0], s->ipaddr.u8[1],
s->ipaddr.u8[2], s->ipaddr.u8[3]);
ip64_set_hostaddr((uip_ip4addr_t *)&s->ipaddr);
ip64_set_netmask((uip_ip4addr_t *)&s->netmask);
ip64_set_draddr((uip_ip4addr_t *)&s->default_router);
ip64_addr_4to6((uip_ip4addr_t *)&s->dnsaddr, &ip6dnsaddr);
// mdns_conf(&ip6dnsaddr);
}
/*---------------------------------------------------------------------------*/
static int
start_request(struct http_socket *s)
{
uip_ip4addr_t ip4addr;
uip_ip6addr_t ip6addr;
uip_ip6addr_t *addr;
char host[MAX_HOSTLEN];
char path[MAX_PATHLEN];
uint16_t port;
int ret;
if(parse_url(s->url, host, &port, path)) {
printf("url %s host %s port %d path %s\n",
s->url, host, port, path);
/* Check if we are to route the request through a proxy. */
if(s->proxy_port != 0) {
/* The proxy address should be an IPv6 address. */
uip_ip6addr_copy(&ip6addr, &s->proxy_addr);
port = s->proxy_port;
} else if(uiplib_ip6addrconv(host, &ip6addr) == 0) {
/* First check if the host is an IP address. */
if(uiplib_ip4addrconv(host, &ip4addr) != 0) {
ip64_addr_4to6(&ip4addr, &ip6addr);
} else {
/* Try to lookup the hostname. If it fails, we initiate a hostname
lookup. */
ret = resolv_lookup(host, &addr);
if(ret == RESOLV_STATUS_UNCACHED ||
ret == RESOLV_STATUS_EXPIRED) {
resolv_query(host);
puts("Resolving host...");
return HTTP_SOCKET_OK;
}
if(addr != NULL) {
s->did_tcp_connect = 1;
tcp_socket_connect(&s->s, addr, port);
return HTTP_SOCKET_OK;
} else {
return HTTP_SOCKET_ERR;
}
}
}
tcp_socket_connect(&s->s, &ip6addr, port);
return HTTP_SOCKET_OK;
} else {
return HTTP_SOCKET_ERR;
}
}
/*-----------------------------------------------------------------------------------*/
unsigned char
websocket_http_client_get(struct websocket_http_client_state *s,
const char *host, uint16_t port, const char *file,
const char *subprotocol)
{
struct uip_conn *conn;
uip_ip6addr_t ip6addr;
uip_ip4addr_t ip4addr;
uip_ipaddr_t *ipaddr;
ipaddr = &ip6addr;
/* First check if the host is an IP address. */
if(uiplib_ip6addrconv(host, &ip6addr) == 0) {
if(uiplib_ip4addrconv(host, &ip4addr) != 0) {
ip64_addr_4to6(&ip4addr, &ip6addr);
} else {
#if UIP_UDP
ipaddr = mdns_lookup(host);
if(ipaddr == NULL) {
return 0;
}
#else /* UIP_UDP */
return 0;
#endif /* UIP_UDP */
}
}
conn = tcp_connect(ipaddr, uip_htons(port), NULL);
if(conn == NULL) {
return 0;
}
tcp_markconn(conn, s);
s->conn = conn;
s->port = port;
strncpy(s->file, file, sizeof(s->file));
strncpy(s->host, host, sizeof(s->host));
strncpy(s->subprotocol, subprotocol, sizeof(s->subprotocol));
init_connection(s);
return 1;
}
/*---------------------------------------------------------------------------*/
static int
start_request(struct http_socket *s)
{
uip_ip4addr_t ip4addr;
uip_ip6addr_t ip6addr;
uip_ip6addr_t *addr;
char host[MAX_HOSTLEN];
char path[MAX_PATHLEN];
uint16_t port;
if(parse_url(s->url, host, &port, path)) {
printf("url %s host %s port %d path %s\n\r",
s->url, host, port, path);
/* First check if the host is an IP address. */
if(uiplib_ip6addrconv(host, &ip6addr) == 0) {
if(uiplib_ip4addrconv(host, &ip4addr) != 0) {
ip64_addr_4to6(&ip4addr, &ip6addr);
} else {
/* Try to lookup the hostname. If it fails, we initiate a hostname
lookup. */
addr = mdns_lookup(host);
if(addr == NULL) {
mdns_query(host);
puts("Resolving host...");
return HTTP_SOCKET_OK;
}
tcp_socket_connect(&s->s, addr, port);
return HTTP_SOCKET_OK;
}
}
tcp_socket_connect(&s->s, &ip6addr, port);
return HTTP_SOCKET_OK;
} else {
return HTTP_SOCKET_ERR;
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(http_example_process, ev, data)
{
static struct etimer et;
uip_ip4addr_t ip4addr;
uip_ip6addr_t ip6addr;
PROCESS_BEGIN();
uip_ipaddr(&ip4addr, 8, 8, 8, 8);
ip64_addr_4to6(&ip4addr, &ip6addr);
uip_nameserver_update(&ip6addr, UIP_NAMESERVER_INFINITE_LIFETIME);
etimer_set(&et, CLOCK_SECOND * 20);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
memset(url_buffer, 0, HTTP_CLIENT_BUFFER_LEN);
snprintf(url_buffer, HTTP_CLIENT_BUFFER_LEN,
"http://maker.ifttt.com/trigger/%s/with/key/%s",
IFTTT_EVENT, IFTTT_KEY);
http_socket_init(&s);
restarts = 0;
while(1) {
PROCESS_YIELD();
if((ev == sensors_event) && (data == &button_sensor)) {
if(button_sensor.value(BUTTON_SENSOR_VALUE_TYPE_LEVEL) ==
BUTTON_SENSOR_PRESSED_LEVEL) {
leds_on(LEDS_GREEN);
printf("Button pressed! sending a POST to IFTTT\n");
http_socket_post(&s, url_buffer, NULL, 0, NULL, callback, NULL);
}
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
static int
start_request(struct http_socket *s)
{
uip_ip4addr_t ip4addr;
uip_ip6addr_t ip6addr;
uip_ipaddr_t *addr;
char host[MAX_HOSTLEN];
char path[MAX_PATHLEN];
uint16_t port;
if(parse_url(s->url, host, &port, path)) {
PRINTF("%s url %s host %s port %d path %s\n",
HTTP_METHOD_STR(s->method), s->url, host, port, path);
/* First check if the host is an IP address. */
if(uiplib_ip6addrconv(host, &ip6addr) == 0) {
if(uiplib_ip4addrconv(host, &ip4addr) != 0) {
ip64_addr_4to6(&ip4addr, &ip6addr);
} else {
/* Try to lookup the hostname. If it fails, we initiate a hostname
lookup. */
if(resolv_lookup(host, &addr) != RESOLV_STATUS_CACHED) {
resolv_query(host);
PRINTF("Resolving host...\n");
return HTTP_SOCKET_OK;
}
tcp_socket_connect(&s->s, addr, port);
return HTTP_SOCKET_OK;
}
}
tcp_socket_connect(&s->s, (uip_ipaddr_t *)&ip6addr, port);
return HTTP_SOCKET_OK;
} else {
return HTTP_SOCKET_ERR;
}
}
/*---------------------------------------------------------------------------*/
void
ip64_dhcpc_configured(const struct ip64_dhcpc_state *s)
{
uip_ip6addr_t ip6dnsaddr;
PRINTF("DHCP Configured with %d.%d.%d.%d\n",
s->ipaddr.u8[0], s->ipaddr.u8[1],
s->ipaddr.u8[2], s->ipaddr.u8[3]);
ip64_set_hostaddr((uip_ip4addr_t *)&s->ipaddr);
ip64_set_netmask((uip_ip4addr_t *)&s->netmask);
ip64_set_draddr((uip_ip4addr_t *)&s->default_router);
if(!uip_ip4addr_cmp((uip_ip4addr_t *)&s->dnsaddr, &uip_all_zeroes_addr)) {
//Note: Currently we assume only one DNS server
uip_ipaddr_t * dns = uip_nameserver_get(0);
//Only update DNS entry if it is empty or already IPv4
if(uip_is_addr_unspecified(dns) || ip64_addr_is_ip64(dns)) {
ip64_addr_4to6((uip_ip4addr_t *)&s->dnsaddr, &ip6dnsaddr);
uip_nameserver_update(&ip6dnsaddr, uip_ntohs(s->lease_time[0])*65536ul + uip_ntohs(s->lease_time[1]));
}
}
#if CETIC_6LBR
cetic_6lbr_ip64_dhcpc_configured(s);
#endif
}
/*---------------------------------------------------------------------------*/
void
contiki_init(void)
{
int i;
uint8_t addr[sizeof(uip_lladdr.addr)];
uip_ipaddr_t ipaddr;
uip_ds6_addr_t *lladdr;
uip_ip4addr_t ipv4addr, netmask;
/* Start process handler */
process_init();
/* Start Contiki processes */
process_start(&etimer_process, NULL);
process_start(&sensors_process, NULL);
ctimer_init();
/* Print startup information */
printf(CONTIKI_VERSION_STRING " started. ");
if(node_id > 0) {
printf("Node id is set to %u.\n", node_id);
} else {
printf("Node id is not set.\n");
}
set_mac_addr();
queuebuf_init();
/* Initialize communication stack */
netstack_init();
printf("%s/%s/%s, channel check rate %lu Hz\n",
NETSTACK_NETWORK.name, NETSTACK_MAC.name, NETSTACK_RDC.name,
CLOCK_SECOND / (NETSTACK_RDC.channel_check_interval() == 0 ? 1:
NETSTACK_RDC.channel_check_interval()));
/* IPv6 CONFIGURATION */
for(i = 0; i < sizeof(uip_lladdr.addr); i += 2) {
addr[i + 1] = node_id & 0xff;
addr[i + 0] = node_id >> 8;
}
linkaddr_copy(addr, &linkaddr_node_addr);
memcpy(&uip_lladdr.addr, addr, sizeof(uip_lladdr.addr));
process_start(&tcpip_process, NULL);
printf("Tentative link-local IPv6 address ");
lladdr = uip_ds6_get_link_local(-1);
for(i = 0; i < 7; ++i) {
printf("%02x%02x:", lladdr->ipaddr.u8[i * 2],
lladdr->ipaddr.u8[i * 2 + 1]);
}
printf("%02x%02x\n", lladdr->ipaddr.u8[14],
lladdr->ipaddr.u8[15]);
uip_ip6addr(&ipaddr, 0xaaaa, 0, 0, 0, 0, 0, 0, 0);
uip_ds6_set_addr_iid(&ipaddr, &uip_lladdr);
uip_ds6_addr_add(&ipaddr, 0, ADDR_TENTATIVE);
printf("Tentative global IPv6 address ");
for(i = 0; i < 7; ++i) {
printf("%02x%02x:",
ipaddr.u8[i * 2], ipaddr.u8[i * 2 + 1]);
}
printf("%02x%02x\n",
ipaddr.u8[7 * 2], ipaddr.u8[7 * 2 + 1]);
/* Start serial process */
serial_line_init();
/* Start autostart processes (defined in Contiki application) */
print_processes(autostart_processes);
autostart_start(autostart_processes);
/* Start the SLIP */
printf("Initiating SLIP with IP address is 172.16.0.2.\n");
uip_ipaddr(&ipv4addr, 172, 16, 0, 2);
uip_ipaddr(&netmask, 255, 255, 255, 0);
ip64_set_ipv4_address(&ipv4addr, &netmask);
rs232_set_input(slip_input_byte);
log_set_putchar_with_slip(1);
uip_ip4addr_t ip4addr;
uip_ip6addr_t ip6addr;
uip_ipaddr(&ip4addr, 8,8,8,8);
ip64_addr_4to6(&ip4addr, &ip6addr);
uip_nameserver_update((uip_ipaddr_t *)&ip6addr, UIP_NAMESERVER_INFINITE_LIFETIME);
}
/*---------------------------------------------------------------------------*/
int
ip64_4to6(const uint8_t *ipv4packet, const uint16_t ipv4packet_len,
uint8_t *resultpacket)
{
struct ipv4_hdr *v4hdr;
struct ipv6_hdr *v6hdr;
struct udp_hdr *udphdr;
struct tcp_hdr *tcphdr;
struct icmpv4_hdr *icmpv4hdr;
struct icmpv6_hdr *icmpv6hdr;
uint16_t ipv4len, ipv6len, ipv6_packet_len;
struct ip64_addrmap_entry *m;
v6hdr = (struct ipv6_hdr *)resultpacket;
v4hdr = (struct ipv4_hdr *)ipv4packet;
if((v4hdr->len[0] << 8) + v4hdr->len[1] <= ipv4packet_len) {
ipv4len = (v4hdr->len[0] << 8) + v4hdr->len[1];
} else {
PRINTF("ip64_4to6: packet smaller than reported in IPv4 header, dropping\n");
return 0;
}
if(ipv4len <= IPV4_HDRLEN) {
return 0;
}
/* Make sure that the resulting packet fits in the ip64 packet
buffer. If not, we drop it. */
if(ipv4len - IPV4_HDRLEN + IPV6_HDRLEN > BUFSIZE) {
PRINTF("ip64_4to6: packet too big to fit in buffer, dropping\n");
return 0;
}
/* We copy the data from the IPv4 packet into the IPv6 packet. */
memcpy(&resultpacket[IPV6_HDRLEN],
&ipv4packet[IPV4_HDRLEN],
ipv4len - IPV4_HDRLEN);
udphdr = (struct udp_hdr *)&resultpacket[IPV6_HDRLEN];
tcphdr = (struct tcp_hdr *)&resultpacket[IPV6_HDRLEN];
icmpv4hdr = (struct icmpv4_hdr *)&ipv4packet[IPV4_HDRLEN];
icmpv6hdr = (struct icmpv6_hdr *)&resultpacket[IPV6_HDRLEN];
ipv6len = ipv4len - IPV4_HDRLEN + IPV6_HDRLEN;
ipv6_packet_len = ipv6len - IPV6_HDRLEN;
/* Translate the IPv4 header into an IPv6 header. */
/* We first fill in the simple fields: IP header version, traffic
class and flow label, and length fields. */
v6hdr->vtc = 0x60;
v6hdr->tcflow = 0;
v6hdr->flow = 0;
v6hdr->len[0] = ipv6_packet_len >> 8;
v6hdr->len[1] = ipv6_packet_len & 0xff;
/* We use the IPv4 TTL field as the IPv6 hop limit field. */
v6hdr->hoplim = v4hdr->ttl;
/* We now translate the IPv4 source and destination addresses to
IPv6 source and destination addresses. We translate the IPv4
source address into an IPv6-encoded IPv4 address. The IPv4
destination address will be the address with which we have
previously been configured, through the ip64_set_ipv4_address()
function. We use the mapping table to look up the new IPv6
destination address. As we assume that the IPv4 packet is a
response to a previously sent IPv6 packet, we should have a
mapping between the (protocol, destport, srcport, srcaddress)
tuple. If not, we'll return 0 to indicate that we failed to
translate the packet. */
if(ip64_addr_4to6(&v4hdr->srcipaddr, &v6hdr->srcipaddr) == 0) {
PRINTF("ip64_packet_4to6: failed to convert source IP address\n");
return 0;
}
/* For the next header field, we simply use the IPv4 protocol
field. We only support UDP and TCP packets. */
switch(v4hdr->proto) {
case IP_PROTO_UDP:
v6hdr->nxthdr = IP_PROTO_UDP;
break;
case IP_PROTO_TCP:
v6hdr->nxthdr = IP_PROTO_TCP;
break;
case IP_PROTO_ICMPV4:
/* Allow only ICMPv4 ECHO_REQUESTS (ping packets) through to the
local IPv6 host. */
if(icmpv4hdr->type == ICMP_ECHO) {
PRINTF("ip64_4to6: translating ICMPv4 ECHO packet\n");
v6hdr->nxthdr = IP_PROTO_ICMPV6;
icmpv6hdr->type = ICMP6_ECHO;
ip64_addr_copy6(&v6hdr->destipaddr, &ipv6_local_address);
} else {
PRINTF("ip64_packet_4to6: ICMPv4 packet type %d not supported\n",
icmpv4hdr->type);
return 0;
}
break;
default:
/* For protocol types that we do not support, we return 0 to
indicate that we failed to translate the packet to an IPv6
packet. */
PRINTF("ip64_packet_4to6: protocol type %d not supported\n",
v4hdr->proto);
return 0;
}
/* Translate IPv4 broadcasts to IPv6 all-nodes multicasts. */
if(uip_ip4addr_cmp(&v4hdr->destipaddr, &ipv4_broadcast_addr) ||
(uip_ipaddr_maskcmp(&v4hdr->destipaddr, &ip64_hostaddr,
&ip64_netmask) &&
((v4hdr->destipaddr.u16[0] & (~ip64_netmask.u16[0])) ==
(ipv4_broadcast_addr.u16[0] & (~ip64_netmask.u16[0]))) &&
((v4hdr->destipaddr.u16[1] & (~ip64_netmask.u16[1])) ==
(ipv4_broadcast_addr.u16[1] & (~ip64_netmask.u16[1]))))) {
uip_create_linklocal_allnodes_mcast(&v6hdr->destipaddr);
} else {
if(!ip64_hostaddr_configured) {
PRINTF("ip64_packet_4to6: no local IPv4 address configured, dropping incoming packet.\n");
return 0;
}
if(!uip_ip4addr_cmp(&v4hdr->destipaddr, &ip64_hostaddr)) {
PRINTF("ip64_packet_4to6: the IPv4 destination address %d.%d.%d.%d did not match our IPv4 address %d.%d.%d.%d\n",
uip_ipaddr_to_quad(&v4hdr->destipaddr),
uip_ipaddr_to_quad(&ip64_hostaddr));
return 0;
}
/* Now we translate the transport layer port numbers. We assume that
the IPv4 packet is a response to a packet that has previously
been translated from IPv6 to IPv4. If this is the case, the tuple
(protocol, destport, srcport, srcaddress) corresponds to an address/port
pair in our mapping table. If we do not find a mapping, we return
0 to indicate that we could not translate the IPv4 packet to an
IPv6 packet. */
/* XXX treat a few ports differently: those ports should be let
through to the local host. For those ports, we set up an address
mapping that ensures that the local port number is retained. */
if((v4hdr->proto == IP_PROTO_TCP || v4hdr->proto == IP_PROTO_UDP)) {
if(uip_htons(tcphdr->destport) < EPHEMERAL_PORTRANGE) {
/* This packet should go to the local host. */
PRINTF("Port is in the non-ephemeral port range %d (%d)\n",
tcphdr->destport, uip_htons(tcphdr->destport));
ip64_addr_copy6(&v6hdr->destipaddr, &ipv6_local_address);
} else if(ip64_special_ports_incoming_is_special(uip_htons(tcphdr->destport))) {
uip_ip6addr_t newip6addr;
uint16_t newport;
PRINTF("ip64 port %d (%d) is special, treating it differently\n",
tcphdr->destport, uip_htons(tcphdr->destport));
if(ip64_special_ports_translate_incoming(uip_htons(tcphdr->destport),
&newip6addr, &newport)) {
ip64_addr_copy6(&v6hdr->destipaddr, &newip6addr);
tcphdr->destport = uip_htons(newport);
PRINTF("New port %d (%d)\n",
tcphdr->destport, uip_htons(tcphdr->destport));
} else {
ip64_addr_copy6(&v6hdr->destipaddr, &ipv6_local_address);
PRINTF("No new port\n");
}
} else {
/* The TCP or UDP port numbers were not non-ephemeral and not
special, so we map the port number according to the address
mapping table. */
m = ip64_addrmap_lookup_port(uip_ntohs(udphdr->destport),
v4hdr->proto);
if(m == NULL) {
PRINTF("Inbound lookup failed\n");
return 0;
} else {
PRINTF("Inbound lookup did not fail\n");
}
ip64_addr_copy6(&v6hdr->destipaddr, &m->ip6addr);
udphdr->destport = uip_htons(m->ip6port);
}
}
}
/* The checksum is in different places in the different protocol
headers, so we need to be sure that we update the correct
field. */
switch(v6hdr->nxthdr) {
case IP_PROTO_TCP:
tcphdr->tcpchksum = 0;
tcphdr->tcpchksum = ~(ipv6_transport_checksum(resultpacket,
ipv6len,
IP_PROTO_TCP));
break;
case IP_PROTO_UDP:
udphdr->udpchksum = 0;
udphdr->udpchksum = ~(ipv6_transport_checksum(resultpacket,
ipv6len,
IP_PROTO_UDP));
if(udphdr->udpchksum == 0) {
udphdr->udpchksum = 0xffff;
}
break;
case IP_PROTO_ICMPV6:
icmpv6hdr->icmpchksum = 0;
icmpv6hdr->icmpchksum = ~(ipv6_transport_checksum(resultpacket,
ipv6len,
IP_PROTO_ICMPV6));
break;
default:
PRINTF("ip64_4to6: transport protocol %d not implemented\n", v4hdr->proto);
return 0;
}
/* Finally, we return the length of the resulting IPv6 packet. */
PRINTF("ip64_4to6: ipv6len %d\n", ipv6len);
return ipv6len;
}
