static ng_ipv6_addr_t *_add_addr_to_entry(ng_ipv6_netif_t *entry, const ng_ipv6_addr_t *addr,
uint8_t prefix_len, uint8_t flags)
{
ng_ipv6_netif_addr_t *tmp_addr = NULL;
for (int i = 0; i < NG_IPV6_NETIF_ADDR_NUMOF; i++) {
if (ng_ipv6_addr_equal(&(entry->addrs[i].addr), addr)) {
return &(entry->addrs[i].addr);
}
if (ng_ipv6_addr_is_unspecified(&(entry->addrs[i].addr)) && !tmp_addr) {
tmp_addr = &(entry->addrs[i]);
}
}
if (!tmp_addr) {
DEBUG("ipv6 netif: couldn't add %s/%" PRIu8 " to interface %" PRIkernel_pid "\n: No space left.",
ng_ipv6_addr_to_str(addr_str, addr, sizeof(addr_str)),
prefix_len, entry->pid);
return NULL;
}
memcpy(&(tmp_addr->addr), addr, sizeof(ng_ipv6_addr_t));
DEBUG("ipv6 netif: Added %s/%" PRIu8 " to interface %" PRIkernel_pid "\n",
ng_ipv6_addr_to_str(addr_str, addr, sizeof(addr_str)),
prefix_len, entry->pid);
tmp_addr->prefix_len = prefix_len;
tmp_addr->flags = flags;
if (ng_ipv6_addr_is_multicast(addr)) {
tmp_addr->flags |= NG_IPV6_NETIF_ADDR_FLAGS_NON_UNICAST;
}
else {
ng_ipv6_addr_t sol_node;
if (!ng_ipv6_addr_is_link_local(addr)) {
/* add also corresponding link-local address */
ng_ipv6_addr_t ll_addr;
ll_addr.u64[1] = addr->u64[1];
ng_ipv6_addr_set_link_local_prefix(&ll_addr);
_add_addr_to_entry(entry, &ll_addr, 64,
flags | NG_IPV6_NETIF_ADDR_FLAGS_NDP_ON_LINK);
}
else {
tmp_addr->flags |= NG_IPV6_NETIF_ADDR_FLAGS_NDP_ON_LINK;
}
ng_ipv6_addr_set_solicited_nodes(&sol_node, addr);
_add_addr_to_entry(entry, &sol_node, NG_IPV6_ADDR_BIT_LEN, 0);
}
return &(tmp_addr->addr);
}
void ng_ipv6_netif_add(kernel_pid_t pid)
{
for (int i = 0; i < NG_NETIF_NUMOF; i++) {
if (ipv6_ifs[i].pid == pid) {
return; /* prevent duplicates */
}
else if (ipv6_ifs[i].pid == KERNEL_PID_UNDEF) {
ng_ipv6_addr_t addr = NG_IPV6_ADDR_ALL_NODES_LINK_LOCAL;
mutex_lock(&ipv6_ifs[i].mutex);
DEBUG("Add IPv6 interface %" PRIkernel_pid " (i = %d)\n", pid, i);
ipv6_ifs[i].pid = pid;
DEBUG(" * pid = %" PRIkernel_pid " ", ipv6_ifs[i].pid);
ipv6_ifs[i].mtu = NG_IPV6_NETIF_DEFAULT_MTU;
DEBUG("mtu = %d ", ipv6_ifs[i].mtu);
ipv6_ifs[i].cur_hl = NG_IPV6_NETIF_DEFAULT_HL;
DEBUG("cur_hl = %d ", ipv6_ifs[i].cur_hl);
_add_addr_to_entry(&ipv6_ifs[i], &addr, NG_IPV6_ADDR_BIT_LEN, 0);
mutex_unlock(&ipv6_ifs[i].mutex);
return;
}
}
DEBUG("Could not add %" PRIkernel_pid " to IPv6: No space left.\n", pid);
}
void gnrc_ipv6_netif_init_by_dev(void)
{
kernel_pid_t ifs[GNRC_NETIF_NUMOF];
size_t ifnum = gnrc_netif_get(ifs);
for (size_t i = 0; i < ifnum; i++) {
ipv6_addr_t addr;
eui64_t iid;
gnrc_ipv6_netif_t *ipv6_if = gnrc_ipv6_netif_get(ifs[i]);
if (ipv6_if == NULL) {
continue;
}
mutex_lock(&ipv6_if->mutex);
#ifdef MODULE_GNRC_SIXLOWPAN
gnrc_nettype_t if_type = GNRC_NETTYPE_UNDEF;
if ((gnrc_netapi_get(ifs[i], NETOPT_PROTO, 0, &if_type,
sizeof(if_type)) != -ENOTSUP) &&
(if_type == GNRC_NETTYPE_SIXLOWPAN)) {
uint16_t src_len = 8;
uint16_t max_frag_size = UINT16_MAX;
DEBUG("ipv6 netif: Set 6LoWPAN flag\n");
ipv6_ifs[i].flags |= GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN;
/* use EUI-64 (8-byte address) for IID generation and for sending
* packets */
gnrc_netapi_set(ifs[i], NETOPT_SRC_LEN, 0, &src_len,
sizeof(src_len)); /* don't care for result */
if (gnrc_netapi_get(ifs[i], NETOPT_MAX_PACKET_SIZE,
0, &max_frag_size, sizeof(max_frag_size)) < 0) {
/* if error we assume it works */
DEBUG("ipv6 netif: Can not get max packet size from interface %"
PRIkernel_pid "\n", ifs[i]);
}
gnrc_sixlowpan_netif_add(ifs[i], max_frag_size);
}
#endif
if ((gnrc_netapi_get(ifs[i], NETOPT_IPV6_IID, 0, &iid,
sizeof(eui64_t)) < 0)) {
mutex_unlock(&ipv6_if->mutex);
continue;
}
ipv6_addr_set_aiid(&addr, iid.uint8);
ipv6_addr_set_link_local_prefix(&addr);
_add_addr_to_entry(ipv6_if, &addr, 64, 0);
mutex_unlock(&ipv6_if->mutex);
}
}
void gnrc_ipv6_netif_add(kernel_pid_t pid)
{
gnrc_ipv6_netif_t *free_entry = NULL;
for (int i = 0; i < GNRC_NETIF_NUMOF; i++) {
if (ipv6_ifs[i].pid == pid) {
/* pid has already been added */
return;
}
else if ((ipv6_ifs[i].pid == KERNEL_PID_UNDEF) && !free_entry) {
/* found the first free entry */
free_entry = &ipv6_ifs[i];
}
}
if (!free_entry) {
DEBUG("ipv6 netif: Could not add %" PRIkernel_pid " to IPv6: No space left.\n", pid);
return;
}
/* Otherwise, fill the free entry */
ipv6_addr_t addr = IPV6_ADDR_ALL_NODES_LINK_LOCAL;
mutex_lock(&free_entry->mutex);
DEBUG("ipv6 netif: Add IPv6 interface %" PRIkernel_pid " (i = %d)\n", pid,
free_entry - ipv6_ifs);
free_entry->pid = pid;
free_entry->mtu = GNRC_IPV6_NETIF_DEFAULT_MTU;
free_entry->cur_hl = GNRC_IPV6_NETIF_DEFAULT_HL;
free_entry->flags = 0;
_add_addr_to_entry(free_entry, &addr, IPV6_ADDR_BIT_LEN, 0);
mutex_unlock(&free_entry->mutex);
#ifdef MODULE_GNRC_NDP
gnrc_ndp_netif_add(free_entry);
#endif
DEBUG(" * pid = %" PRIkernel_pid " ", free_entry->pid);
DEBUG("cur_hl = %d ", free_entry->cur_hl);
DEBUG("mtu = %d ", free_entry->mtu);
DEBUG("flags = %04" PRIx16 "\n", free_entry->flags);
}
void ng_ipv6_netif_init_by_dev(void)
{
kernel_pid_t ifs[NG_NETIF_NUMOF];
size_t ifnum = ng_netif_get(ifs);
for (size_t i = 0; i < ifnum; i++) {
ng_ipv6_addr_t addr;
eui64_t iid;
ng_ipv6_netif_t *ipv6_if = ng_ipv6_netif_get(ifs[i]);
if (ipv6_if == NULL) {
continue;
}
mutex_lock(&ipv6_if->mutex);
#ifdef MODULE_NG_SIXLOWPAN
ng_nettype_t if_type = NG_NETTYPE_UNDEF;
if ((ng_netapi_get(ifs[i], NETCONF_OPT_PROTO, 0, &if_type,
sizeof(if_type)) != -ENOTSUP) &&
(if_type == NG_NETTYPE_SIXLOWPAN)) {
uint16_t src_len = 8;
DEBUG("Set 6LoWPAN flag\n");
ipv6_ifs[i].flags |= NG_IPV6_NETIF_FLAGS_SIXLOWPAN;
/* use EUI-64 (8-byte address) for IID generation and for sending
* packets */
ng_netapi_set(ifs[i], NETCONF_OPT_SRC_LEN, 0, &src_len,
sizeof(src_len)); /* don't care for result */
}
#endif
if ((ng_netapi_get(ifs[i], NETCONF_OPT_IPV6_IID, 0, &iid,
sizeof(eui64_t)) < 0)) {
mutex_unlock(&ipv6_if->mutex);
continue;
}
ng_ipv6_addr_set_aiid(&addr, iid.uint8);
ng_ipv6_addr_set_link_local_prefix(&addr);
_add_addr_to_entry(ipv6_if, &addr, 64, 0);
mutex_unlock(&ipv6_if->mutex);
}
}
ipv6_addr_t *gnrc_ipv6_netif_add_addr(kernel_pid_t pid, const ipv6_addr_t *addr,
uint8_t prefix_len, uint8_t flags)
{
gnrc_ipv6_netif_t *entry = gnrc_ipv6_netif_get(pid);
ipv6_addr_t *res;
if ((entry == NULL) || (addr == NULL) || (ipv6_addr_is_unspecified(addr)) ||
((prefix_len - 1) > 127)) { /* prefix_len < 1 || prefix_len > 128 */
return NULL;
}
mutex_lock(&entry->mutex);
res = _add_addr_to_entry(entry, addr, prefix_len, flags);
mutex_unlock(&entry->mutex);
return res;
}
int ng_ipv6_netif_add_addr(kernel_pid_t pid, const ng_ipv6_addr_t *addr,
uint8_t prefix_len, bool anycast)
{
ng_ipv6_netif_t *entry = ng_ipv6_netif_get(pid);
int res;
if (entry == NULL) {
return -ENOENT;
}
if ((addr == NULL) || (ng_ipv6_addr_is_unspecified(addr)) ||
((prefix_len - 1) > 127)) { /* prefix_len < 1 || prefix_len > 128 */
return -EINVAL;
}
mutex_lock(&entry->mutex);
res = _add_addr_to_entry(entry, addr, prefix_len, anycast);
mutex_unlock(&entry->mutex);
return res;
}
void gnrc_ipv6_netif_init_by_dev(void)
{
kernel_pid_t ifs[GNRC_NETIF_NUMOF];
size_t ifnum = gnrc_netif_get(ifs);
#ifdef MODULE_GNRC_SIXLOWPAN_ND_BORDER_ROUTER
bool abr_init = false;
#endif
for (size_t i = 0; i < ifnum; i++) {
ipv6_addr_t addr;
eui64_t iid;
uint16_t tmp;
gnrc_ipv6_netif_t *ipv6_if = gnrc_ipv6_netif_get(ifs[i]);
if (ipv6_if == NULL) {
continue;
}
mutex_lock(&ipv6_if->mutex);
#ifdef MODULE_GNRC_SIXLOWPAN
gnrc_nettype_t if_type = GNRC_NETTYPE_UNDEF;
if ((gnrc_netapi_get(ifs[i], NETOPT_PROTO, 0, &if_type,
sizeof(if_type)) != -ENOTSUP) &&
(if_type == GNRC_NETTYPE_SIXLOWPAN)) {
uint16_t src_len = 8;
uint16_t max_frag_size = UINT16_MAX;
DEBUG("ipv6 netif: Set 6LoWPAN flag\n");
ipv6_ifs[i].flags |= GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN;
/* the router flag must be set early here, because otherwise
* _add_addr_to_entry() wouldn't set the solicited node address.
* However, addresses have to be configured before calling
* gnrc_ipv6_netif_set_router().
*/
#ifdef MODULE_GNRC_SIXLOWPAN_ND_ROUTER
DEBUG("ipv6 netif: Set router flag\n");
ipv6_ifs[i].flags |= GNRC_IPV6_NETIF_FLAGS_ROUTER;
#endif
/* use EUI-64 (8-byte address) for IID generation and for sending
* packets */
gnrc_netapi_set(ifs[i], NETOPT_SRC_LEN, 0, &src_len,
sizeof(src_len)); /* don't care for result */
if (gnrc_netapi_get(ifs[i], NETOPT_MAX_PACKET_SIZE,
0, &max_frag_size, sizeof(max_frag_size)) < 0) {
/* if error we assume it works */
DEBUG("ipv6 netif: Can not get max packet size from interface %"
PRIkernel_pid "\n", ifs[i]);
}
gnrc_sixlowpan_netif_add(ifs[i], max_frag_size);
}
#endif
/* set link-local address */
if ((gnrc_netapi_get(ifs[i], NETOPT_IPV6_IID, 0, &iid,
sizeof(eui64_t)) < 0)) {
mutex_unlock(&ipv6_if->mutex);
continue;
}
ipv6_addr_set_aiid(&addr, iid.uint8);
ipv6_addr_set_link_local_prefix(&addr);
_add_addr_to_entry(ipv6_if, &addr, 64, 0);
/* set link MTU */
if ((gnrc_netapi_get(ifs[i], NETOPT_MAX_PACKET_SIZE, 0, &tmp,
sizeof(uint16_t)) >= 0)) {
if (tmp >= IPV6_MIN_MTU) {
ipv6_if->mtu = tmp;
}
/* otherwise leave at GNRC_IPV6_NETIF_DEFAULT_MTU as initialized in
* gnrc_ipv6_netif_add() */
}
if (gnrc_netapi_get(ifs[i], NETOPT_IS_WIRED, 0, &tmp, sizeof(int)) > 0) {
ipv6_if->flags |= GNRC_IPV6_NETIF_FLAGS_IS_WIRED;
}
else {
ipv6_if->flags &= ~GNRC_IPV6_NETIF_FLAGS_IS_WIRED;
}
mutex_unlock(&ipv6_if->mutex);
#if (defined(MODULE_GNRC_NDP_ROUTER) || defined(MODULE_GNRC_SIXLOWPAN_ND_ROUTER))
gnrc_ipv6_netif_set_router(ipv6_if, true);
#endif
#ifdef MODULE_GNRC_SIXLOWPAN_ND
if (ipv6_if->flags & GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN) {
#ifdef MODULE_GNRC_SIXLOWPAN_ND_BORDER_ROUTER
/* first interface wins */
if (!abr_init) {
gnrc_sixlowpan_nd_router_abr_create(&addr, 0);
gnrc_ipv6_netif_set_rtr_adv(ipv6_if, true);
abr_init = true;
}
#endif
gnrc_sixlowpan_nd_init(ipv6_if);
continue; /* skip gnrc_ndp_host_init() */
}
#endif
#ifdef MODULE_GNRC_NDP_HOST
/* start periodic router solicitations */
gnrc_ndp_host_init(ipv6_if);
#endif
}
}
static ipv6_addr_t *_add_addr_to_entry(gnrc_ipv6_netif_t *entry, const ipv6_addr_t *addr,
uint8_t prefix_len, uint8_t flags)
{
gnrc_ipv6_netif_addr_t *tmp_addr = NULL;
for (int i = 0; i < GNRC_IPV6_NETIF_ADDR_NUMOF; i++) {
if (ipv6_addr_equal(&(entry->addrs[i].addr), addr)) {
return &(entry->addrs[i].addr);
}
if (ipv6_addr_is_unspecified(&(entry->addrs[i].addr)) && !tmp_addr) {
tmp_addr = &(entry->addrs[i]);
}
}
if (!tmp_addr) {
DEBUG("ipv6 netif: couldn't add %s/%" PRIu8 " to interface %" PRIkernel_pid "\n: No space left.",
ipv6_addr_to_str(addr_str, addr, sizeof(addr_str)),
prefix_len, entry->pid);
return NULL;
}
memcpy(&(tmp_addr->addr), addr, sizeof(ipv6_addr_t));
DEBUG("ipv6 netif: Added %s/%" PRIu8 " to interface %" PRIkernel_pid "\n",
ipv6_addr_to_str(addr_str, addr, sizeof(addr_str)),
prefix_len, entry->pid);
tmp_addr->prefix_len = prefix_len;
tmp_addr->flags = flags;
#ifdef MODULE_GNRC_SIXLOWPAN_ND
if (!ipv6_addr_is_multicast(&(tmp_addr->addr)) &&
(entry->flags & GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN)) {
ipv6_addr_t *router = gnrc_ndp_internal_default_router();
if (router != NULL) {
mutex_unlock(&entry->mutex); /* function below relocks mutex */
gnrc_ndp_internal_send_nbr_sol(entry->pid, &tmp_addr->addr, router, router);
mutex_lock(&entry->mutex); /* relock mutex */
}
/* otherwise there is no default router to register to */
}
#endif
if (ipv6_addr_is_multicast(addr)) {
tmp_addr->flags |= GNRC_IPV6_NETIF_ADDR_FLAGS_NON_UNICAST;
}
else {
if (!ipv6_addr_is_link_local(addr)) {
#ifdef MODULE_GNRC_SIXLOWPAN_ND_BORDER_ROUTER
tmp_addr->valid = 0xFFFF;
gnrc_sixlowpan_nd_router_abr_t *abr = gnrc_sixlowpan_nd_router_abr_get();
if (gnrc_sixlowpan_nd_router_abr_add_prf(abr, entry, tmp_addr) < 0) {
DEBUG("ipv6_netif: error adding prefix to 6LoWPAN-ND management\n");
}
#endif
#if defined(MODULE_GNRC_NDP_ROUTER) || defined(MODULE_GNRC_SIXLOWPAN_ND_ROUTER)
if ((entry->flags & GNRC_IPV6_NETIF_FLAGS_ROUTER) &&
(entry->flags & GNRC_IPV6_NETIF_FLAGS_RTR_ADV)) {
mutex_unlock(&entry->mutex); /* function below relocks mutex */
#ifdef MODULE_GNRC_SIXLOWPAN_ND_ROUTER
if (entry->flags & GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN) {
gnrc_ndp_internal_send_rtr_adv(entry->pid, NULL, NULL, false);
}
#endif
#ifdef MODULE_GNRC_NDP_ROUTER
/* New prefixes MAY allow the router to retransmit up to
* GNRC_NDP_MAX_INIT_RTR_ADV_NUMOF unsolicited RA
* (see https://tools.ietf.org/html/rfc4861#section-6.2.4) */
if (!(entry->flags & GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN)) {
entry->rtr_adv_count = GNRC_NDP_MAX_INIT_RTR_ADV_NUMOF;
gnrc_ndp_router_retrans_rtr_adv(entry);
}
#endif
mutex_lock(&entry->mutex); /* relock mutex */
}
#endif
}
else {
tmp_addr->flags |= GNRC_IPV6_NETIF_ADDR_FLAGS_NDP_ON_LINK;
}
#if defined(MODULE_GNRC_NDP_NODE) || defined(MODULE_GNRC_SIXLOWPAN_ND_ROUTER)
/* add solicited-nodes multicast address for new address if interface is not a
* 6LoWPAN host interface (see: https://tools.ietf.org/html/rfc6775#section-5.2) */
if (!(entry->flags & GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN) ||
(entry->flags & GNRC_IPV6_NETIF_FLAGS_ROUTER)) {
ipv6_addr_t sol_node;
ipv6_addr_set_solicited_nodes(&sol_node, addr);
_add_addr_to_entry(entry, &sol_node, IPV6_ADDR_BIT_LEN, 0);
}
#endif
/* TODO: send NS with ARO on 6LoWPAN interfaces, but not so many and only for the new
* source address. */
}
return &(tmp_addr->addr);
}
static ipv6_addr_t *_add_addr_to_entry(gnrc_ipv6_netif_t *entry, const ipv6_addr_t *addr,
uint8_t prefix_len, uint8_t flags)
{
gnrc_ipv6_netif_addr_t *tmp_addr = NULL;
for (int i = 0; i < GNRC_IPV6_NETIF_ADDR_NUMOF; i++) {
if (ipv6_addr_equal(&(entry->addrs[i].addr), addr)) {
return &(entry->addrs[i].addr);
}
if (ipv6_addr_is_unspecified(&(entry->addrs[i].addr)) && !tmp_addr) {
tmp_addr = &(entry->addrs[i]);
}
}
if (!tmp_addr) {
DEBUG("ipv6 netif: couldn't add %s/%" PRIu8 " to interface %" PRIkernel_pid "\n: No space left.",
ipv6_addr_to_str(addr_str, addr, sizeof(addr_str)),
prefix_len, entry->pid);
return NULL;
}
memcpy(&(tmp_addr->addr), addr, sizeof(ipv6_addr_t));
DEBUG("ipv6 netif: Added %s/%" PRIu8 " to interface %" PRIkernel_pid "\n",
ipv6_addr_to_str(addr_str, addr, sizeof(addr_str)),
prefix_len, entry->pid);
tmp_addr->prefix_len = prefix_len;
tmp_addr->flags = flags;
if (ipv6_addr_is_multicast(addr)) {
tmp_addr->flags |= GNRC_IPV6_NETIF_ADDR_FLAGS_NON_UNICAST;
}
else {
if (!ipv6_addr_is_link_local(addr)) {
/* add also corresponding link-local address */
ipv6_addr_t ll_addr;
ll_addr.u64[1] = addr->u64[1];
ipv6_addr_set_link_local_prefix(&ll_addr);
_add_addr_to_entry(entry, &ll_addr, 64,
flags | GNRC_IPV6_NETIF_ADDR_FLAGS_NDP_ON_LINK);
#ifdef MODULE_GNRC_NDP_ROUTER
/* New prefixes MAY allow the router to retransmit up to
* GNRC_NDP_MAX_INIT_RTR_ADV_NUMOF unsolicited RA
* (see https://tools.ietf.org/html/rfc4861#section-6.2.4) */
if ((entry->flags & GNRC_IPV6_NETIF_FLAGS_ROUTER) &&
(entry->flags & GNRC_IPV6_NETIF_FLAGS_RTR_ADV)) {
entry->rtr_adv_count = GNRC_NDP_MAX_INIT_RTR_ADV_NUMOF;
mutex_unlock(&entry->mutex); /* function below relocks mutex */
gnrc_ndp_router_retrans_rtr_adv(entry);
mutex_lock(&entry->mutex); /* relock mutex */
}
#endif
}
else {
tmp_addr->flags |= GNRC_IPV6_NETIF_ADDR_FLAGS_NDP_ON_LINK;
}
#if defined(MODULE_GNRC_NDP_NODE) || defined(MODULE_GNRC_SIXLOWPAN_ND_ROUTER)
/* add solicited-nodes multicast address for new address if interface is not a
* 6LoWPAN host interface (see: https://tools.ietf.org/html/rfc6775#section-5.2) */
if (!(entry->flags & GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN) ||
(entry->flags & GNRC_IPV6_NETIF_FLAGS_ROUTER)) {
ipv6_addr_t sol_node;
ipv6_addr_set_solicited_nodes(&sol_node, addr);
_add_addr_to_entry(entry, &sol_node, IPV6_ADDR_BIT_LEN, 0);
}
#endif
/* TODO: send NS with ARO on 6LoWPAN interfaces, but not so many and only for the new
* source address. */
}
return &(tmp_addr->addr);
}