/**
* @ingroup netif_ip6
* Change the state of an IPv6 address of a network interface
* (INVALID, TEMPTATIVE, PREFERRED, DEPRECATED, where TEMPTATIVE
* includes the number of checks done, see ip6_addr.h)
*
* @param netif the network interface to change
* @param addr_idx index of the IPv6 address
* @param state the new IPv6 address state
*/
void
netif_ip6_addr_set_state(struct netif* netif, s8_t addr_idx, u8_t state)
{
u8_t old_state;
LWIP_ASSERT("netif != NULL", netif != NULL);
LWIP_ASSERT("invalid index", addr_idx < LWIP_IPV6_NUM_ADDRESSES);
old_state = netif_ip6_addr_state(netif, addr_idx);
/* state is actually being changed? */
if (old_state != state) {
u8_t old_valid = old_state & IP6_ADDR_VALID;
u8_t new_valid = state & IP6_ADDR_VALID;
LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_ip6_addr_set_state: netif address state being changed\n"));
if (old_valid && !new_valid) {
/* address about to be removed by setting invalid */
#if LWIP_TCP
tcp_netif_ip_addr_changed(netif_ip_addr6(netif, addr_idx), NULL);
#endif /* LWIP_TCP */
#if LWIP_UDP
udp_netif_ip_addr_changed(netif_ip_addr6(netif, addr_idx), NULL);
#endif /* LWIP_UDP */
#if LWIP_RAW
raw_netif_ip_addr_changed(netif_ip_addr6(netif, addr_idx), NULL);
#endif /* LWIP_RAW */
/* @todo: remove mib2 ip6 entries? */
}
netif->ip6_addr_state[addr_idx] = state;
if (!old_valid && new_valid) {
/* address added by setting valid */
/* @todo: add mib2 ip6 entries? */
netif_issue_reports(netif, NETIF_REPORT_TYPE_IPV6);
}
if ((old_state & IP6_ADDR_PREFERRED) != (state & IP6_ADDR_PREFERRED)) {
/* address state has changed (valid flag changed or switched between
preferred and deprecated) -> call the callback function */
NETIF_STATUS_CALLBACK(netif);
}
}
LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("netif: IPv6 address %d of interface %c%c set to %s/0x%"X8_F"\n",
addr_idx, netif->name[0], netif->name[1], ip6addr_ntoa(netif_ip6_addr(netif, addr_idx)),
netif_ip6_addr_state(netif, addr_idx)));
}
/*
* Change an IPv6 address of a network interface (internal version taking 4 * u32_t)
*
* @param netif the network interface to change
* @param addr_idx index of the IPv6 address
* @param i0 word0 of the new IPv6 address
* @param i1 word1 of the new IPv6 address
* @param i2 word2 of the new IPv6 address
* @param i3 word3 of the new IPv6 address
*/
void
netif_ip6_addr_set_parts(struct netif *netif, s8_t addr_idx, u32_t i0, u32_t i1, u32_t i2, u32_t i3)
{
const ip6_addr_t *old_addr;
LWIP_ASSERT("netif != NULL", netif != NULL);
LWIP_ASSERT("invalid index", addr_idx < LWIP_IPV6_NUM_ADDRESSES);
old_addr = netif_ip6_addr(netif, addr_idx);
/* address is actually being changed? */
if ((old_addr->addr[0] != i0) || (old_addr->addr[1] != i1) ||
(old_addr->addr[2] != i2) || (old_addr->addr[3] != i3)) {
LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_ip6_addr_set: netif address being changed\n"));
if (netif_ip6_addr_state(netif, addr_idx) & IP6_ADDR_VALID) {
#if LWIP_TCP || LWIP_UDP
ip_addr_t new_ipaddr;
IP_ADDR6(&new_ipaddr, i0, i1, i2, i3);
#endif /* LWIP_TCP || LWIP_UDP */
#if LWIP_TCP
tcp_netif_ip_addr_changed(netif_ip_addr6(netif, addr_idx), &new_ipaddr);
#endif /* LWIP_TCP */
#if LWIP_UDP
udp_netif_ip_addr_changed(netif_ip_addr6(netif, addr_idx), &new_ipaddr);
#endif /* LWIP_UDP */
#if LWIP_RAW
raw_netif_ip_addr_changed(netif_ip_addr6(netif, addr_idx), &new_ipaddr);
#endif /* LWIP_RAW */
}
/* @todo: remove/readd mib2 ip6 entries? */
IP6_ADDR(ip_2_ip6(&(netif->ip6_addr[addr_idx])), i0, i1, i2, i3);
IP_SET_TYPE_VAL(netif->ip6_addr[addr_idx], IPADDR_TYPE_V6);
if (netif_ip6_addr_state(netif, addr_idx) & IP6_ADDR_VALID) {
netif_issue_reports(netif, NETIF_REPORT_TYPE_IPV6);
NETIF_STATUS_CALLBACK(netif);
}
}
LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("netif: IPv6 address %d of interface %c%c set to %s/0x%"X8_F"\n",
addr_idx, netif->name[0], netif->name[1], ip6addr_ntoa(netif_ip6_addr(netif, addr_idx)),
netif_ip6_addr_state(netif, addr_idx)));
}
const ip_addr_t *LWIP::get_ipv6_addr(const struct netif *netif)
{
if (!netif_is_up(netif)) {
return NULL;
}
for (int i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) &&
!ip6_addr_islinklocal(netif_ip6_addr(netif, i))) {
return netif_ip_addr6(netif, i);
}
}
return NULL;
}
/**
* Select the best IPv6 source address for a given destination
* IPv6 address. Loosely follows RFC 3484. "Strong host" behavior
* is assumed.
*
* @param netif the netif on which to send a packet
* @param dest the destination we are trying to reach
* @return the most suitable source address to use, or NULL if no suitable
* source address is found
*/
const ip_addr_t *
ip6_select_source_address(struct netif *netif, const ip6_addr_t * dest)
{
const ip_addr_t *src = NULL;
u8_t i;
/* If dest is link-local, choose a link-local source. */
if (ip6_addr_islinklocal(dest) || ip6_addr_ismulticast_linklocal(dest) || ip6_addr_ismulticast_iflocal(dest)) {
for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) &&
ip6_addr_islinklocal(netif_ip6_addr(netif, i))) {
return netif_ip_addr6(netif, i);
}
}
}
/* Choose a site-local with matching prefix. */
if (ip6_addr_issitelocal(dest) || ip6_addr_ismulticast_sitelocal(dest)) {
for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) &&
ip6_addr_issitelocal(netif_ip6_addr(netif, i)) &&
ip6_addr_netcmp(dest, netif_ip6_addr(netif, i))) {
return netif_ip_addr6(netif, i);
}
}
}
/* Choose a unique-local with matching prefix. */
if (ip6_addr_isuniquelocal(dest) || ip6_addr_ismulticast_orglocal(dest)) {
for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) &&
ip6_addr_isuniquelocal(netif_ip6_addr(netif, i)) &&
ip6_addr_netcmp(dest, netif_ip6_addr(netif, i))) {
return netif_ip_addr6(netif, i);
}
}
}
/* Choose a global with best matching prefix. */
if (ip6_addr_isglobal(dest) || ip6_addr_ismulticast_global(dest)) {
for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) &&
ip6_addr_isglobal(netif_ip6_addr(netif, i))) {
if (src == NULL) {
src = netif_ip_addr6(netif, i);
}
else {
/* Replace src only if we find a prefix match. */
/* TODO find longest matching prefix. */
if ((!(ip6_addr_netcmp(ip_2_ip6(src), dest))) &&
ip6_addr_netcmp(netif_ip6_addr(netif, i), dest)) {
src = netif_ip_addr6(netif, i);
}
}
}
}
if (src != NULL) {
return src;
}
}
/* Last resort: see if arbitrary prefix matches. */
for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i)) &&
ip6_addr_netcmp(dest, netif_ip6_addr(netif, i))) {
return netif_ip_addr6(netif, i);
}
}
return NULL;
}
/**
* @ingroup netif
* Remove a network interface from the list of lwIP netifs.
*
* @param netif the network interface to remove
*/
void
netif_remove(struct netif *netif)
{
#if LWIP_IPV6
int i;
#endif
if (netif == NULL) {
return;
}
#if LWIP_IPV4
if (!ip4_addr_isany_val(*netif_ip4_addr(netif))) {
#if LWIP_TCP
tcp_netif_ip_addr_changed(netif_ip_addr4(netif), NULL);
#endif /* LWIP_TCP */
#if LWIP_UDP
udp_netif_ip_addr_changed(netif_ip_addr4(netif), NULL);
#endif /* LWIP_UDP */
#if LWIP_RAW
raw_netif_ip_addr_changed(netif_ip_addr4(netif), NULL);
#endif /* LWIP_RAW */
}
#if LWIP_IGMP
/* stop IGMP processing */
if (netif->flags & NETIF_FLAG_IGMP) {
igmp_stop(netif);
}
#endif /* LWIP_IGMP */
#endif /* LWIP_IPV4*/
#if LWIP_IPV6
for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
if (ip6_addr_isvalid(netif_ip6_addr_state(netif, i))) {
#if LWIP_TCP
tcp_netif_ip_addr_changed(netif_ip_addr6(netif, i), NULL);
#endif /* LWIP_TCP */
#if LWIP_UDP
udp_netif_ip_addr_changed(netif_ip_addr6(netif, i), NULL);
#endif /* LWIP_UDP */
#if LWIP_RAW
raw_netif_ip_addr_changed(netif_ip_addr6(netif, i), NULL);
#endif /* LWIP_RAW */
}
}
#if LWIP_IPV6_MLD
/* stop MLD processing */
mld6_stop(netif);
#endif /* LWIP_IPV6_MLD */
#endif /* LWIP_IPV6 */
if (netif_is_up(netif)) {
/* set netif down before removing (call callback function) */
netif_set_down(netif);
}
mib2_remove_ip4(netif);
/* this netif is default? */
if (netif_default == netif) {
/* reset default netif */
netif_set_default(NULL);
}
/* is it the first netif? */
if (netif_list == netif) {
netif_list = netif->next;
} else {
/* look for netif further down the list */
struct netif * tmp_netif;
for (tmp_netif = netif_list; tmp_netif != NULL; tmp_netif = tmp_netif->next) {
if (tmp_netif->next == netif) {
tmp_netif->next = netif->next;
break;
}
}
if (tmp_netif == NULL) {
return; /* netif is not on the list */
}
}
mib2_netif_removed(netif);
#if LWIP_NETIF_REMOVE_CALLBACK
if (netif->remove_callback) {
netif->remove_callback(netif);
}
#endif /* LWIP_NETIF_REMOVE_CALLBACK */
LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
}
