/* Sends a ping packet out the radio */
static void
raven_ping6(uip_ipaddr_t *addr, int len)
{
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 0;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
UIP_IP_BUF->ttl = UIP_TTL;
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, addr);
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
UIP_ICMP_BUF->type = ICMP6_ECHO_REQUEST;
UIP_ICMP_BUF->icode = 0;
/* set identifier and sequence number to 0 */
memset((void *)UIP_ICMP_BUF + UIP_ICMPH_LEN, 0, UIP_ICMP6_ECHO_REQUEST_LEN);
/* put len bytes of all one data */
memset((void *)UIP_ICMP_BUF + UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN,
1, len);
uip_len = UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN + UIP_IPH_LEN + len;
UIP_IP_BUF->len[0] = (u8_t)((uip_len - 40) >> 8);
UIP_IP_BUF->len[1] = (u8_t)((uip_len - 40) & 0x00FF);
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
tcpip_ipv6_output();
}
/*---------------------------------------------------------------------------*/
static void
send_ping(uip_ipaddr_t *dest_addr)
#if UIP_CONF_IPV6
{
static uint16_t count;
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 1;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
UIP_IP_BUF->ttl = uip_ds6_if.cur_hop_limit;
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, dest_addr);
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
UIP_ICMP_BUF->type = ICMP6_ECHO_REQUEST;
UIP_ICMP_BUF->icode = 0;
/* set identifier and sequence number to 0 */
memset((uint8_t *)UIP_ICMP_BUF + UIP_ICMPH_LEN, 0, 4);
/* put one byte of data */
memset((uint8_t *)UIP_ICMP_BUF + UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN,
count, PING_DATALEN);
count++;
uip_len = UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN +
UIP_IPH_LEN + PING_DATALEN;
UIP_IP_BUF->len[0] = (uint8_t)((uip_len - 40) >> 8);
UIP_IP_BUF->len[1] = (uint8_t)((uip_len - 40) & 0x00ff);
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
tcpip_ipv6_output();
}
/* Sends a ping packet out the radio */
void
raven_ping6(void)
{
/* ping ipv6.google.com*/
uip_ip6addr(&ping_addr,0x2001,0x420,0x5FFF,0x7D,0x2D0,0xB7FF,0xFE23,0xE6DB);
//uip_ip6addr(&ping_addr, 0x2001, 0x4860, 0, 0x2001, 0, 0, 0, 0x68);
//uip_ip6addr(&ping_addr, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0, 0, 0, 1);
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 1;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
//UIP_IP_BUF->ttl = uip_netif_physical_if.cur_hop_limit;
UIP_IP_BUF->ttl = uip_ds6_if.cur_hop_limit;
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &ping_addr);
//uip_netif_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
UIP_ICMP_BUF->type = ICMP6_ECHO_REQUEST;
UIP_ICMP_BUF->icode = 0;
/* set identifier and sequence number to 0 */
memset((void *)UIP_ICMP_BUF + UIP_ICMPH_LEN, 0, 4);
uip_len = UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN + UIP_IPH_LEN;
UIP_IP_BUF->len[0] = (uint8_t)((uip_len - 40) >> 8);
UIP_IP_BUF->len[1] = (uint8_t)((uip_len - 40) & 0x00FF);
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
tcpip_ipv6_output();
}
/*------------------------------------------------------------------*/
void
uip_nd6_ns_output(uip_ipaddr_t * src, uip_ipaddr_t * dest, uip_ipaddr_t * tgt)
{
uip_ext_len = 0;
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 0;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
UIP_IP_BUF->ttl = UIP_ND6_HOP_LIMIT;
if(dest == NULL) {
uip_create_solicited_node(tgt, &UIP_IP_BUF->destipaddr);
} else {
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, dest);
}
UIP_ICMP_BUF->type = ICMP6_NS;
UIP_ICMP_BUF->icode = 0;
UIP_ND6_NS_BUF->reserved = 0;
uip_ipaddr_copy((uip_ipaddr_t *) &UIP_ND6_NS_BUF->tgtipaddr, tgt);
UIP_IP_BUF->len[0] = 0; /* length will not be more than 255 */
/*
* check if we add a SLLAO option: for DAD, MUST NOT, for NUD, MAY
* (here yes), for Address resolution , MUST
*/
if(!(uip_ds6_is_my_addr(tgt))) {
if(src != NULL) {
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, src);
} else {
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
}
UIP_IP_BUF->len[1] =
UIP_ICMPH_LEN + UIP_ND6_NS_LEN + UIP_ND6_OPT_LLAO_LEN;
create_llao(&uip_buf[uip_l2_l3_icmp_hdr_len + UIP_ND6_NS_LEN],
UIP_ND6_OPT_SLLAO);
uip_len =
UIP_IPH_LEN + UIP_ICMPH_LEN + UIP_ND6_NS_LEN + UIP_ND6_OPT_LLAO_LEN;
} else {
uip_create_unspecified(&UIP_IP_BUF->srcipaddr);
UIP_IP_BUF->len[1] = UIP_ICMPH_LEN + UIP_ND6_NS_LEN;
uip_len = UIP_IPH_LEN + UIP_ICMPH_LEN + UIP_ND6_NS_LEN;
}
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
UIP_STAT(++uip_stat.nd6.sent);
PRINTF("Sending NS to");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("from");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("with target address");
PRINT6ADDR(tgt);
PRINTF("\n");
return;
}
/*---------------------------------------------------------------------------*/
void
uip_icmp6_echo_request_input(void)
{
#if UIP_CONF_IPV6_RPL
u8_t temp_ext_len;
#endif /* UIP_CONF_IPV6_RPL */
/*
* we send an echo reply. It is trivial if there was no extension
* headers in the request otherwise we need to remove the extension
* headers and change a few fields
*/
PRINTF("Received Echo Request from");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("to");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("\n");
/* IP header */
UIP_IP_BUF->ttl = uip_ds6_if.cur_hop_limit;
if(uip_is_addr_mcast(&UIP_IP_BUF->destipaddr)){
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &UIP_IP_BUF->srcipaddr);
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
} else {
uip_ipaddr_copy(&tmp_ipaddr, &UIP_IP_BUF->srcipaddr);
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &tmp_ipaddr);
}
if(uip_ext_len > 0) {
#if UIP_CONF_IPV6_RPL
if ((temp_ext_len=rpl_invert_header())) {
/* If there were other extension headers*/
UIP_FIRST_EXT_BUF->next = UIP_PROTO_ICMP6;
if (uip_ext_len != temp_ext_len) {
uip_len -= (uip_ext_len - temp_ext_len);
UIP_IP_BUF->len[0] = ((uip_len - UIP_IPH_LEN) >> 8);
UIP_IP_BUF->len[1] = ((uip_len - UIP_IPH_LEN) & 0xff);
/* move the echo request payload (starting after the icmp header)
* to the new location in the reply.
* The shift is equal to the length of the remaining extension headers present
* Note: UIP_ICMP_BUF still points to the echo request at this stage
*/
memmove((uint8_t *)UIP_ICMP_BUF + UIP_ICMPH_LEN - (uip_ext_len - temp_ext_len),
(uint8_t *)UIP_ICMP_BUF + UIP_ICMPH_LEN,
(uip_len - UIP_IPH_LEN - temp_ext_len - UIP_ICMPH_LEN));
}
uip_ext_len=temp_ext_len;
} else {
/* Useful for debugging so allow external calls */
void
raven_ping6(void)
{
#define PING_GOOGLE 0
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 1;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
UIP_IP_BUF->ttl = uip_ds6_if.cur_hop_limit;
#if PING_GOOGLE
if (seqno==1) {
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, uip_ds6_defrt_choose()); //the default router
} else if (seqno==2) {
uip_ip6addr(&UIP_IP_BUF->destipaddr,0x2001,0x4860,0x800f,0x0000,0x0000,0x0000,0x0000,0x0093); //ipv6.google.com
} else if (seqno==3) {
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, uip_ds6_defrt_choose()); //the default router
} else {
// uip_ip6addr(&UIP_IP_BUF->destipaddr,0x2001,0x0420,0x5FFF,0x007D,0x02D0,0xB7FF,0xFE23,0xE6DB); //?.cisco.com
uip_ip6addr(&UIP_IP_BUF->destipaddr,0x2001,0x0420,0x0000,0x0010,0x0250,0x8bff,0xfee8,0xf800); //six.cisco.com
}
#else
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, uip_ds6_defrt_choose()); //the default router
#endif
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
UIP_ICMP_BUF->type = ICMP6_ECHO_REQUEST;
UIP_ICMP_BUF->icode = 0;
/* set identifier and sequence number to 0 */
memset((void *)UIP_ICMP_BUF + UIP_ICMPH_LEN, 0, 4);
/* put one byte of data */
memset((void *)UIP_ICMP_BUF + UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN,
count, PING6_DATALEN);
uip_len = UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN + UIP_IPH_LEN + PING6_DATALEN;
UIP_IP_BUF->len[0] = (uint8_t)((uip_len - 40) >> 8);
UIP_IP_BUF->len[1] = (uint8_t)((uip_len - 40) & 0x00FF);
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
tcpip_ipv6_output();
}
/*---------------------------------------------------------------------------*/
static void
ping6handler()
{
if(count < PING6_NB) {
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 1;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
UIP_IP_BUF->ttl = uip_ds6_if.cur_hop_limit;
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &dest_addr);
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
UIP_ICMP_BUF->type = ICMP6_ECHO_REQUEST;
UIP_ICMP_BUF->icode = 0;
/* set identifier and sequence number to 0 */
memset((uint8_t *)UIP_ICMP_BUF + UIP_ICMPH_LEN, 0, 4);
/* put one byte of data */
memset((uint8_t *)UIP_ICMP_BUF + UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN,
count, PING6_DATALEN);
uip_len = UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN + UIP_IPH_LEN
+ PING6_DATALEN;
UIP_IP_BUF->len[0] = (uint8_t)((uip_len - 40) >> 8);
UIP_IP_BUF->len[1] = (uint8_t)((uip_len - 40) & 0x00FF);
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
PRINTF("Echo Request to ");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF(" from ");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("\n");
UIP_STAT(++uip_stat.icmp.sent);
tcpip_ipv6_output();
count++;
etimer_set(&ping6_periodic_timer, 3 * CLOCK_SECOND);
} else {
/*---------------------------------------------------------------------------*/
static void
echo_request_input(void)
{
/*
* we send an echo reply. It is trivial if there was no extension
* headers in the request otherwise we need to remove the extension
* headers and change a few fields
*/
PRINTF("Received Echo Request from ");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF(" to ");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("\n");
/* IP header */
UIP_IP_BUF->ttl = uip_ds6_if.cur_hop_limit;
if(uip_is_addr_mcast(&UIP_IP_BUF->destipaddr)){
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &UIP_IP_BUF->srcipaddr);
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
} else {
uip_ipaddr_copy(&tmp_ipaddr, &UIP_IP_BUF->srcipaddr);
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &tmp_ipaddr);
}
if(uip_ext_len > 0) {
/* Remove extension headers if any */
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
uip_len -= uip_ext_len;
UIP_IP_BUF->len[0] = ((uip_len - UIP_IPH_LEN) >> 8);
UIP_IP_BUF->len[1] = ((uip_len - UIP_IPH_LEN) & 0xff);
/* move the echo request payload (starting after the icmp header)
* to the new location in the reply.
* The shift is equal to the length of the extension headers present
* Note: UIP_ICMP_BUF still points to the echo request at this stage
*/
memmove((uint8_t *)UIP_ICMP_BUF + UIP_ICMPH_LEN - uip_ext_len,
(uint8_t *)UIP_ICMP_BUF + UIP_ICMPH_LEN,
(uip_len - UIP_IPH_LEN - UIP_ICMPH_LEN));
uip_ext_len = 0;
}
/*---------------------------------------------------------------------------*/
void
uip_nd6_rs_output(void)
{
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 0;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
UIP_IP_BUF->ttl = UIP_ND6_HOP_LIMIT;
uip_create_linklocal_allrouters_mcast(&UIP_IP_BUF->destipaddr);
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
UIP_ICMP_BUF->type = ICMP6_RS;
UIP_ICMP_BUF->icode = 0;
UIP_IP_BUF->len[0] = 0; /* length will not be more than 255 */
if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)) {
UIP_IP_BUF->len[1] = UIP_ICMPH_LEN + UIP_ND6_RS_LEN;
uip_len = uip_l3_icmp_hdr_len + UIP_ND6_RS_LEN;
} else {
uip_len = uip_l3_icmp_hdr_len + UIP_ND6_RS_LEN + UIP_ND6_OPT_LLAO_LEN;
UIP_IP_BUF->len[1] =
UIP_ICMPH_LEN + UIP_ND6_RS_LEN + UIP_ND6_OPT_LLAO_LEN;
create_llao(&uip_buf[uip_l2_l3_icmp_hdr_len + UIP_ND6_RS_LEN],
UIP_ND6_OPT_SLLAO);
}
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
UIP_STAT(++uip_stat.nd6.sent);
PRINTF("Sendin RS to");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("from");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("\n");
return;
}
/*---------------------------------------------------------------------------*/
static u8_t
ping6handler(process_event_t ev, process_data_t data)
{
if(ev == tcpip_icmp6_event) {
switch(*((uint8_t *)data)){
case ICMP6_ECHO_REPLY:
PRINTF("Echo reply received.\n");
break;
default:
PRINTF("Other ICMP6 message received.\n");
}
return 1;
}
if(count == 0){
#if MACDEBUG
#if NODE
#else
#error Must define NODE as the node id to ping
#endif
// Setup destination address.
// aaaa::280:e102:0:4874
addr[0] = 0xbbbb;
addr[7] = 0x0002;
//addr[4] = 0x0280;
//addr[5] = 0xe102;
//addr[6] = 0x0000;
//addr[7] = 0x4874;
//addr[4] = 0x0011;
//addr[5] = 0x22ff;
//addr[6] = 0xfe33;
//addr[7] = 0x4401;
uip_ip6addr(&dest_addr, addr[0], addr[1],addr[2],
addr[3],addr[4],addr[5],addr[6],addr[7]);
// Set the command to fool the 'if' below.
memcpy(command, (void *)"ping6", 5);
#else
/* prompt */
printf("> ");
/** \note the scanf here is blocking (the all stack is blocked waiting
* for user input). This is far from ideal and could be improved
*/
scanf("%s", command);
if(strcmp(command,"ping6") != 0){
PRINTF("> invalid command\n");
return 0;
}
if(scanf(" %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
&addr[0],&addr[1],&addr[2],&addr[3],
&addr[4],&addr[5],&addr[6],&addr[7]) == 8){
uip_ip6addr(&dest_addr, addr[0], addr[1],addr[2],
addr[3],addr[4],addr[5],addr[6],addr[7]);
} else {
PRINTF("> invalid ipv6 address format\n");
return 0;
}
#endif
}
if((strcmp(command,"ping6") == 0) && (count < PING6_NB)){
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 1;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
UIP_IP_BUF->ttl = uip_ds6_if.cur_hop_limit;
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &dest_addr);
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
UIP_ICMP_BUF->type = ICMP6_ECHO_REQUEST;
UIP_ICMP_BUF->icode = 0;
/* set identifier and sequence number to 0 */
memset((uint8_t *)UIP_ICMP_BUF + UIP_ICMPH_LEN, 0, 4);
/* put one byte of data */
memset((uint8_t *)UIP_ICMP_BUF + UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN,
count, PING6_DATALEN);
uip_len = UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN + UIP_IPH_LEN + PING6_DATALEN;
UIP_IP_BUF->len[0] = (u8_t)((uip_len - 40) >> 8);
UIP_IP_BUF->len[1] = (u8_t)((uip_len - 40) & 0x00FF);
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
PRINTF("Sending Echo Request to");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("from");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("\n");
UIP_STAT(++uip_stat.icmp.sent);
tcpip_ipv6_output();
count++;
etimer_set(&ping6_periodic_timer, 3 * CLOCK_SECOND);
return 1;
}
/*---------------------------------------------------------------------------*/
void
uip_nd6_ra_output(uip_ipaddr_t * dest)
{
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 0;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
UIP_IP_BUF->ttl = UIP_ND6_HOP_LIMIT;
if(dest == NULL) {
uip_create_linklocal_allnodes_mcast(&UIP_IP_BUF->destipaddr);
} else {
/* For sollicited RA */
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, dest);
}
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
UIP_ICMP_BUF->type = ICMP6_RA;
UIP_ICMP_BUF->icode = 0;
UIP_ND6_RA_BUF->cur_ttl = uip_ds6_if.cur_hop_limit;
UIP_ND6_RA_BUF->flags_reserved =
(UIP_ND6_M_FLAG << 7) | (UIP_ND6_O_FLAG << 6);
UIP_ND6_RA_BUF->router_lifetime = uip_htons(UIP_ND6_ROUTER_LIFETIME);
//UIP_ND6_RA_BUF->reachable_time = uip_htonl(uip_ds6_if.reachable_time);
//UIP_ND6_RA_BUF->retrans_timer = uip_htonl(uip_ds6_if.retrans_timer);
UIP_ND6_RA_BUF->reachable_time = 0;
UIP_ND6_RA_BUF->retrans_timer = 0;
uip_len = UIP_IPH_LEN + UIP_ICMPH_LEN + UIP_ND6_RA_LEN;
nd6_opt_offset = UIP_ND6_RA_LEN;
/* Prefix list */
for(prefix = uip_ds6_prefix_list;
prefix < uip_ds6_prefix_list + UIP_DS6_PREFIX_NB; prefix++) {
if((prefix->isused) && (prefix->advertise)) {
UIP_ND6_OPT_PREFIX_BUF->type = UIP_ND6_OPT_PREFIX_INFO;
UIP_ND6_OPT_PREFIX_BUF->len = UIP_ND6_OPT_PREFIX_INFO_LEN / 8;
UIP_ND6_OPT_PREFIX_BUF->preflen = prefix->length;
UIP_ND6_OPT_PREFIX_BUF->flagsreserved1 = prefix->l_a_reserved;
UIP_ND6_OPT_PREFIX_BUF->validlt = uip_htonl(prefix->vlifetime);
UIP_ND6_OPT_PREFIX_BUF->preferredlt = uip_htonl(prefix->plifetime);
UIP_ND6_OPT_PREFIX_BUF->reserved2 = 0;
uip_ipaddr_copy(&(UIP_ND6_OPT_PREFIX_BUF->prefix), &(prefix->ipaddr));
nd6_opt_offset += UIP_ND6_OPT_PREFIX_INFO_LEN;
uip_len += UIP_ND6_OPT_PREFIX_INFO_LEN;
}
}
/* Source link-layer option */
create_llao((uint8_t *)UIP_ND6_OPT_HDR_BUF, UIP_ND6_OPT_SLLAO);
uip_len += UIP_ND6_OPT_LLAO_LEN;
nd6_opt_offset += UIP_ND6_OPT_LLAO_LEN;
/* MTU */
UIP_ND6_OPT_MTU_BUF->type = UIP_ND6_OPT_MTU;
UIP_ND6_OPT_MTU_BUF->len = UIP_ND6_OPT_MTU_LEN >> 3;
UIP_ND6_OPT_MTU_BUF->reserved = 0;
//UIP_ND6_OPT_MTU_BUF->mtu = uip_htonl(uip_ds6_if.link_mtu);
UIP_ND6_OPT_MTU_BUF->mtu = uip_htonl(1500);
uip_len += UIP_ND6_OPT_MTU_LEN;
nd6_opt_offset += UIP_ND6_OPT_MTU_LEN;
#if UIP_CONF_DS6_ROUTE_INFORMATION
for(rtinfo = uip_ds6_route_info_list;
rtinfo < uip_ds6_route_info_list + UIP_DS6_ROUTE_INFO_NB; rtinfo++) {
if((rtinfo->isused)) {
UIP_ND6_OPT_ROUTE_BUF->type = UIP_ND6_OPT_ROUTE_INFO;
UIP_ND6_OPT_ROUTE_BUF->len =(rtinfo->length >> 6) + 1 ;
UIP_ND6_OPT_ROUTE_BUF->preflen = rtinfo->length;
UIP_ND6_OPT_ROUTE_BUF->flagsreserved = rtinfo->flags;
UIP_ND6_OPT_ROUTE_BUF->rlifetime = uip_htonl(rtinfo->lifetime);
uip_ipaddr_copy(&(UIP_ND6_OPT_ROUTE_BUF->prefix), &(rtinfo->ipaddr));
nd6_opt_offset += ((rtinfo->length >> 6) + 1)<<3;
uip_len += ((rtinfo->length >> 6) + 1)<<3;
}
}
static void
ns_input(void)
{
uint8_t flags;
#if CETIC_6LBR_SMARTBRIDGE
uip_ds6_route_t * route;
#endif
uip_ipaddr_t tgtipaddr;
PRINTF("Received NS from ");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF(" to ");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF(" with target address");
PRINT6ADDR((uip_ipaddr_t *) (&UIP_ND6_NS_BUF->tgtipaddr));
PRINTF("\n");
UIP_STAT(++uip_stat.nd6.recv);
#if UIP_CONF_IPV6_CHECKS
if((UIP_IP_BUF->ttl != UIP_ND6_HOP_LIMIT) ||
(uip_is_addr_mcast(&UIP_ND6_NS_BUF->tgtipaddr)) ||
(UIP_ICMP_BUF->icode != 0)) {
PRINTF("NS received is bad\n");
goto discard;
}
#endif /* UIP_CONF_IPV6_CHECKS */
/* Options processing */
nd6_opt_llao = NULL;
nd6_opt_offset = UIP_ND6_NS_LEN;
while(uip_l3_icmp_hdr_len + nd6_opt_offset < uip_len) {
#if UIP_CONF_IPV6_CHECKS
if(UIP_ND6_OPT_HDR_BUF->len == 0) {
PRINTF("NS received is bad\n");
goto discard;
}
#endif /* UIP_CONF_IPV6_CHECKS */
switch (UIP_ND6_OPT_HDR_BUF->type) {
case UIP_ND6_OPT_SLLAO:
nd6_opt_llao = &uip_buf[uip_l2_l3_icmp_hdr_len + nd6_opt_offset];
#if UIP_CONF_IPV6_CHECKS
/* There must be NO option in a DAD NS */
if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)) {
PRINTF("NS received is bad\n");
goto discard;
} else {
#endif /*UIP_CONF_IPV6_CHECKS */
nbr = uip_ds6_nbr_lookup(&UIP_IP_BUF->srcipaddr);
if(nbr == NULL) {
/* Copy link address to a uip_lladdr_t first
* to ensure the second argument to uip_ds6_nbr_add is word-aligned */
uip_lladdr_t lladdr;
memcpy(&lladdr, &nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], UIP_LLADDR_LEN);
uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, &lladdr, 0, NBR_STALE);
} else {
uip_lladdr_t *lladdr = (uip_lladdr_t *)uip_ds6_nbr_get_ll(nbr);
if(memcmp(&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
lladdr, UIP_LLADDR_LEN) != 0) {
memcpy(lladdr, &nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], UIP_LLADDR_LEN);
nbr->state = NBR_STALE;
} else {
if(nbr->state == NBR_INCOMPLETE) {
nbr->state = NBR_STALE;
}
}
}
#if UIP_CONF_IPV6_CHECKS
}
#endif /*UIP_CONF_IPV6_CHECKS */
break;
default:
PRINTF("ND option not supported in NS");
break;
}
nd6_opt_offset += (UIP_ND6_OPT_HDR_BUF->len << 3);
}
memcpy(&tgtipaddr, &UIP_ND6_NS_BUF->tgtipaddr, sizeof(tgtipaddr));
addr = uip_ds6_addr_lookup(&tgtipaddr);
#if CETIC_6LBR_SMARTBRIDGE
//ND Proxy implementation
if ( addr == NULL ) {
if ( (route = uip_ds6_route_lookup(&tgtipaddr)) != NULL ) {
if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)) {
/* DAD CASE */
uip_create_linklocal_allnodes_mcast(&tgtipaddr);
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &tgtipaddr);
flags = UIP_ND6_NA_FLAG_OVERRIDE;
goto create_na;
} else {
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &UIP_IP_BUF->srcipaddr);
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &tgtipaddr);
flags = UIP_ND6_NA_FLAG_SOLICITED | UIP_ND6_NA_FLAG_OVERRIDE;
goto create_na;
}
}
}
#endif
if(addr != NULL) {
#if UIP_ND6_DEF_MAXDADNS > 0
if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)) {
/* DAD CASE */
#if UIP_CONF_IPV6_CHECKS
if(!uip_is_addr_solicited_node(&UIP_IP_BUF->destipaddr)) {
PRINTF("NS received is bad\n");
goto discard;
}
#endif /* UIP_CONF_IPV6_CHECKS */
if(addr->state != ADDR_TENTATIVE) {
uip_create_linklocal_allnodes_mcast(&UIP_IP_BUF->destipaddr);
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
flags = UIP_ND6_NA_FLAG_OVERRIDE;
goto create_na;
} else {
/** \todo if I sent a NS before him, I win */
uip_ds6_dad_failed(addr);
goto discard;
}
#else /* UIP_ND6_DEF_MAXDADNS > 0 */
if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)) {
/* DAD CASE */
goto discard;
#endif /* UIP_ND6_DEF_MAXDADNS > 0 */
}
#if UIP_CONF_IPV6_CHECKS
if(uip_ds6_is_my_addr(&UIP_IP_BUF->srcipaddr)) {
/**
* \NOTE do we do something here? we both are using the same address.
* If we are doing dad, we could cancel it, though we should receive a
* NA in response of DAD NS we sent, hence DAD will fail anyway. If we
* were not doing DAD, it means there is a duplicate in the network!
*/
PRINTF("NS received is bad\n");
goto discard;
}
#endif /*UIP_CONF_IPV6_CHECKS */
/* Address resolution case */
if(uip_is_addr_solicited_node(&UIP_IP_BUF->destipaddr)) {
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &UIP_IP_BUF->srcipaddr);
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &tgtipaddr);
flags = UIP_ND6_NA_FLAG_SOLICITED | UIP_ND6_NA_FLAG_OVERRIDE;
goto create_na;
}
/* NUD CASE */
if(uip_ds6_addr_lookup(&UIP_IP_BUF->destipaddr) == addr) {
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &UIP_IP_BUF->srcipaddr);
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &tgtipaddr);
flags = UIP_ND6_NA_FLAG_SOLICITED | UIP_ND6_NA_FLAG_OVERRIDE;
goto create_na;
} else {
#if UIP_CONF_IPV6_CHECKS
PRINTF("NS received is bad\n");
goto discard;
#endif /* UIP_CONF_IPV6_CHECKS */
}
} else {
goto discard;
}
create_na:
/* If the node is a router it should set R flag in NAs */
#if UIP_CONF_ROUTER
flags = flags | UIP_ND6_NA_FLAG_ROUTER;
#endif
uip_ext_len = 0;
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 0;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->len[0] = 0; /* length will not be more than 255 */
UIP_IP_BUF->len[1] = UIP_ICMPH_LEN + UIP_ND6_NA_LEN + UIP_ND6_OPT_LLAO_LEN;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
UIP_IP_BUF->ttl = UIP_ND6_HOP_LIMIT;
UIP_ICMP_BUF->type = ICMP6_NA;
UIP_ICMP_BUF->icode = 0;
UIP_ND6_NA_BUF->flagsreserved = flags;
memcpy(&UIP_ND6_NA_BUF->tgtipaddr, &tgtipaddr, sizeof(uip_ipaddr_t));
create_llao(&uip_buf[uip_l2_l3_icmp_hdr_len + UIP_ND6_NA_LEN],
UIP_ND6_OPT_TLLAO);
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
uip_len =
UIP_IPH_LEN + UIP_ICMPH_LEN + UIP_ND6_NA_LEN + UIP_ND6_OPT_LLAO_LEN;
UIP_STAT(++uip_stat.nd6.sent);
PRINTF("Sending NA to ");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF(" from ");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF(" with target address ");
PRINT6ADDR(&UIP_ND6_NA_BUF->tgtipaddr);
PRINTF("\n");
return;
discard:
uip_clear_buf();
return;
}
#endif /* UIP_ND6_SEND_NA */
/*------------------------------------------------------------------*/
void
uip_nd6_ns_output(uip_ipaddr_t * src, uip_ipaddr_t * dest, uip_ipaddr_t * tgt)
{
uip_ext_len = 0;
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 0;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
UIP_IP_BUF->ttl = UIP_ND6_HOP_LIMIT;
if(dest == NULL) {
uip_create_solicited_node(tgt, &UIP_IP_BUF->destipaddr);
} else {
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, dest);
}
UIP_ICMP_BUF->type = ICMP6_NS;
UIP_ICMP_BUF->icode = 0;
UIP_ND6_NS_BUF->reserved = 0;
uip_ipaddr_copy((uip_ipaddr_t *) &UIP_ND6_NS_BUF->tgtipaddr, tgt);
UIP_IP_BUF->len[0] = 0; /* length will not be more than 255 */
/*
* check if we add a SLLAO option: for DAD, MUST NOT, for NUD, MAY
* (here yes), for Address resolution , MUST
*/
if(!(uip_ds6_is_my_addr(tgt))) {
if(src != NULL) {
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, src);
} else {
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
}
if (uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)) {
PRINTF("Dropping NS due to no suitable source address\n");
uip_clear_buf();
return;
}
UIP_IP_BUF->len[1] =
UIP_ICMPH_LEN + UIP_ND6_NS_LEN + UIP_ND6_OPT_LLAO_LEN;
create_llao(&uip_buf[uip_l2_l3_icmp_hdr_len + UIP_ND6_NS_LEN],
UIP_ND6_OPT_SLLAO);
uip_len =
UIP_IPH_LEN + UIP_ICMPH_LEN + UIP_ND6_NS_LEN + UIP_ND6_OPT_LLAO_LEN;
} else {
uip_create_unspecified(&UIP_IP_BUF->srcipaddr);
UIP_IP_BUF->len[1] = UIP_ICMPH_LEN + UIP_ND6_NS_LEN;
uip_len = UIP_IPH_LEN + UIP_ICMPH_LEN + UIP_ND6_NS_LEN;
}
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
UIP_STAT(++uip_stat.nd6.sent);
PRINTF("Sending NS to");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("from");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("with target address");
PRINT6ADDR(tgt);
PRINTF("\n");
return;
}
/*---------------------------------------------------------------------------*/
void
uip_nd6_ra_output(uip_ipaddr_t * dest)
{
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 0;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
UIP_IP_BUF->ttl = UIP_ND6_HOP_LIMIT;
if(dest == NULL) {
uip_create_linklocal_allnodes_mcast(&UIP_IP_BUF->destipaddr);
} else {
/* For sollicited RA */
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, dest);
}
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
UIP_ICMP_BUF->type = ICMP6_RA;
UIP_ICMP_BUF->icode = 0;
UIP_ND6_RA_BUF->cur_ttl = uip_ds6_if.cur_hop_limit;
UIP_ND6_RA_BUF->flags_reserved =
(UIP_ND6_M_FLAG << 7) | (UIP_ND6_O_FLAG << 6);
UIP_ND6_RA_BUF->router_lifetime = uip_htons(UIP_ND6_ROUTER_LIFETIME);
//UIP_ND6_RA_BUF->reachable_time = uip_htonl(uip_ds6_if.reachable_time);
//UIP_ND6_RA_BUF->retrans_timer = uip_htonl(uip_ds6_if.retrans_timer);
UIP_ND6_RA_BUF->reachable_time = 0;
UIP_ND6_RA_BUF->retrans_timer = 0;
uip_len = UIP_IPH_LEN + UIP_ICMPH_LEN + UIP_ND6_RA_LEN;
nd6_opt_offset = UIP_ND6_RA_LEN;
#if !UIP_CONF_ROUTER
/* Prefix list */
for(prefix = uip_ds6_prefix_list;
prefix < uip_ds6_prefix_list + UIP_DS6_PREFIX_NB; prefix++) {
if((prefix->isused) && (prefix->advertise)) {
UIP_ND6_OPT_PREFIX_BUF->type = UIP_ND6_OPT_PREFIX_INFO;
UIP_ND6_OPT_PREFIX_BUF->len = UIP_ND6_OPT_PREFIX_INFO_LEN / 8;
UIP_ND6_OPT_PREFIX_BUF->preflen = prefix->length;
UIP_ND6_OPT_PREFIX_BUF->flagsreserved1 = prefix->l_a_reserved;
UIP_ND6_OPT_PREFIX_BUF->validlt = uip_htonl(prefix->vlifetime);
UIP_ND6_OPT_PREFIX_BUF->preferredlt = uip_htonl(prefix->plifetime);
UIP_ND6_OPT_PREFIX_BUF->reserved2 = 0;
uip_ipaddr_copy(&(UIP_ND6_OPT_PREFIX_BUF->prefix), &(prefix->ipaddr));
nd6_opt_offset += UIP_ND6_OPT_PREFIX_INFO_LEN;
uip_len += UIP_ND6_OPT_PREFIX_INFO_LEN;
}
}
#endif /* !UIP_CONF_ROUTER */
/* Source link-layer option */
create_llao((uint8_t *)UIP_ND6_OPT_HDR_BUF, UIP_ND6_OPT_SLLAO);
uip_len += UIP_ND6_OPT_LLAO_LEN;
nd6_opt_offset += UIP_ND6_OPT_LLAO_LEN;
/* MTU */
UIP_ND6_OPT_MTU_BUF->type = UIP_ND6_OPT_MTU;
UIP_ND6_OPT_MTU_BUF->len = UIP_ND6_OPT_MTU_LEN >> 3;
UIP_ND6_OPT_MTU_BUF->reserved = 0;
//UIP_ND6_OPT_MTU_BUF->mtu = uip_htonl(uip_ds6_if.link_mtu);
UIP_ND6_OPT_MTU_BUF->mtu = uip_htonl(1500);
uip_len += UIP_ND6_OPT_MTU_LEN;
nd6_opt_offset += UIP_ND6_OPT_MTU_LEN;
UIP_IP_BUF->len[0] = ((uip_len - UIP_IPH_LEN) >> 8);
UIP_IP_BUF->len[1] = ((uip_len - UIP_IPH_LEN) & 0xff);
/*ICMP checksum */
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
UIP_STAT(++uip_stat.nd6.sent);
PRINTF("Sending RA to");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("from");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("\n");
return;
}
/*---------------------------------------------------------------------------*/
static uint8_t
ping6handler(process_event_t ev, process_data_t data)
{
if(count == 0){
#if MACDEBUG
// Setup destination address.
addr[0] = 0xFE80;
addr[4] = 0x6466;
addr[5] = 0x6666;
addr[6] = 0x6666;
addr[7] = 0x6666;
uip_ip6addr(&dest_addr, addr[0], addr[1],addr[2],
addr[3],addr[4],addr[5],addr[6],addr[7]);
// Set the command to fool the 'if' below.
memcpy(command, (void *)"ping6", 5);
#else
/* prompt */
printf("> ");
/** \note the scanf here is blocking (the all stack is blocked waiting
* for user input). This is far from ideal and could be improved
*/
// scanf("%s", command);
command[0] = 'p';
command[1] = 'i';
command[2] = 'n';
command[3] = 'g';
command[4] = '6';
if(strcmp(command,"ping6") != 0){
PRINTF("> invalid command\n");
return 0;
}
/* if(scanf(" %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
&addr[0],&addr[1],&addr[2],&addr[3],
&addr[4],&addr[5],&addr[6],&addr[7]) == 8){
*/
uip_ip6addr(&dest_addr, addr[0], addr[1],addr[2],
addr[3],addr[4],addr[5],addr[6],addr[7]);
/* } else {
PRINTF("> invalid ipv6 address format\n");
return 0;
}*/
#endif
}
if((strcmp(command,"ping6") == 0) && (count < PING6_NB)){
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 1;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
UIP_IP_BUF->ttl = uip_ds6_if.cur_hop_limit;
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &dest_addr);
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
UIP_ICMP_BUF->type = ICMP6_ECHO_REQUEST;
UIP_ICMP_BUF->icode = 0;
/* set identifier and sequence number to 0 */
memset((uint8_t *)UIP_ICMP_BUF + UIP_ICMPH_LEN, 0, 4);
/* put one byte of data */
memset((uint8_t *)UIP_ICMP_BUF + UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN,
count, PING6_DATALEN);
uip_len = UIP_ICMPH_LEN + UIP_ICMP6_ECHO_REQUEST_LEN + UIP_IPH_LEN + PING6_DATALEN;
UIP_IP_BUF->len[0] = (uint8_t)((uip_len - 40) >> 8);
UIP_IP_BUF->len[1] = (uint8_t)((uip_len - 40) & 0x00FF);
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
PRINTF("Sending Echo Request to");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("from");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("\n");
UIP_STAT(++uip_stat.icmp.sent);
tcpip_ipv6_output();
count++;
etimer_set(&ping6_periodic_timer, 3 * CLOCK_SECOND);
return 1;
}
void
uip_nd6_ns_input(void)
{
u8_t flags;
PRINTF("Received NS from");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("to");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("with target address");
PRINT6ADDR((uip_ipaddr_t *) (&UIP_ND6_NS_BUF->tgtipaddr));
PRINTF("\n");
UIP_STAT(++uip_stat.nd6.recv);
#if UIP_CONF_IPV6_CHECKS
if((UIP_IP_BUF->ttl != UIP_ND6_HOP_LIMIT) ||
(uip_is_addr_mcast(&UIP_ND6_NS_BUF->tgtipaddr)) ||
(UIP_ICMP_BUF->icode != 0)) {
PRINTF("NS received is bad\n");
goto discard;
}
#endif /* UIP_CONF_IPV6_CHECKS */
/* Options processing */
nd6_opt_llao = NULL;
nd6_opt_offset = UIP_ND6_NS_LEN;
while(uip_l3_icmp_hdr_len + nd6_opt_offset < uip_len) {
#if UIP_CONF_IPV6_CHECKS
if(UIP_ND6_OPT_HDR_BUF->len == 0) {
PRINTF("NS received is bad\n");
goto discard;
}
#endif /* UIP_CONF_IPV6_CHECKS */
switch (UIP_ND6_OPT_HDR_BUF->type) {
case UIP_ND6_OPT_SLLAO:
nd6_opt_llao = &uip_buf[uip_l2_l3_icmp_hdr_len + nd6_opt_offset];
#if UIP_CONF_IPV6_CHECKS
/* There must be NO option in a DAD NS */
if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)) {
PRINTF("NS received is bad\n");
goto discard;
} else {
#endif /*UIP_CONF_IPV6_CHECKS */
nbr = uip_ds6_nbr_lookup(&UIP_IP_BUF->srcipaddr);
if(nbr == NULL) {
uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr,
(uip_lladdr_t *)&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
0, NBR_STALE);
} else {
if(memcmp(&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
&nbr->lladdr, UIP_LLADDR_LEN) != 0) {
memcpy(&nbr->lladdr, &nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
UIP_LLADDR_LEN);
nbr->state = NBR_STALE;
} else {
if(nbr->state == NBR_INCOMPLETE) {
nbr->state = NBR_STALE;
}
}
}
#if UIP_CONF_IPV6_CHECKS
}
#endif /*UIP_CONF_IPV6_CHECKS */
break;
default:
PRINTF("ND option not supported in NS");
break;
}
nd6_opt_offset += (UIP_ND6_OPT_HDR_BUF->len << 3);
}
addr = uip_ds6_addr_lookup(&UIP_ND6_NS_BUF->tgtipaddr);
if(addr != NULL) {
if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)) {
/* DAD CASE */
#if UIP_CONF_IPV6_CHECKS
if(!uip_is_addr_solicited_node(&UIP_IP_BUF->destipaddr)) {
PRINTF("NS received is bad\n");
goto discard;
}
#endif /* UIP_CONF_IPV6_CHECKS */
if(addr->state != ADDR_TENTATIVE) {
uip_create_linklocal_allnodes_mcast(&UIP_IP_BUF->destipaddr);
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
flags = UIP_ND6_NA_FLAG_OVERRIDE;
goto create_na;
} else {
/** \todo if I sent a NS before him, I win */
uip_ds6_dad_failed(addr);
goto discard;
}
}
#if UIP_CONF_IPV6_CHECKS
if(uip_ds6_is_my_addr(&UIP_IP_BUF->srcipaddr)) {
/**
* \NOTE do we do something here? we both are using the same address.
* If we are doing dad, we could cancel it, though we should receive a
* NA in response of DAD NS we sent, hence DAD will fail anyway. If we
* were not doing DAD, it means there is a duplicate in the network!
*/
PRINTF("NS received is bad\n");
goto discard;
}
#endif /*UIP_CONF_IPV6_CHECKS */
/* Address resolution case */
if(uip_is_addr_solicited_node(&UIP_IP_BUF->destipaddr)) {
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &UIP_IP_BUF->srcipaddr);
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &UIP_ND6_NS_BUF->tgtipaddr);
flags = UIP_ND6_NA_FLAG_SOLICITED | UIP_ND6_NA_FLAG_OVERRIDE;
goto create_na;
}
/* NUD CASE */
if(uip_ds6_addr_lookup(&UIP_IP_BUF->destipaddr) == addr) {
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &UIP_IP_BUF->srcipaddr);
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &UIP_ND6_NS_BUF->tgtipaddr);
flags = UIP_ND6_NA_FLAG_SOLICITED | UIP_ND6_NA_FLAG_OVERRIDE;
goto create_na;
} else {
#if UIP_CONF_IPV6_CHECKS
PRINTF("NS received is bad\n");
goto discard;
#endif /* UIP_CONF_IPV6_CHECKS */
}
} else {
goto discard;
}
create_na:
uip_ext_len = 0;
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 0;
UIP_IP_BUF->flow = 0;
UIP_IP_BUF->len[0] = 0; /* length will not be more than 255 */
UIP_IP_BUF->len[1] = UIP_ICMPH_LEN + UIP_ND6_NA_LEN + UIP_ND6_OPT_LLAO_LEN;
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
UIP_IP_BUF->ttl = UIP_ND6_HOP_LIMIT;
UIP_ICMP_BUF->type = ICMP6_NA;
UIP_ICMP_BUF->icode = 0;
UIP_ND6_NA_BUF->flagsreserved = flags;
memcpy(&UIP_ND6_NA_BUF->tgtipaddr, &addr->ipaddr, sizeof(uip_ipaddr_t));
create_llao(&uip_buf[uip_l2_l3_icmp_hdr_len + UIP_ND6_NA_LEN],
UIP_ND6_OPT_TLLAO);
UIP_ICMP_BUF->icmpchksum = 0;
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
uip_len =
UIP_IPH_LEN + UIP_ICMPH_LEN + UIP_ND6_NA_LEN + UIP_ND6_OPT_LLAO_LEN;
UIP_STAT(++uip_stat.nd6.sent);
PRINTF("Sending NA to");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("from");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("with target address");
PRINT6ADDR(&UIP_ND6_NA_BUF->tgtipaddr);
PRINTF("\n");
return;
discard:
uip_len = 0;
return;
}
