void process_new_gateway (
lisp_addr_t gateway,
lispd_iface_elt *iface )
{
lisp_addr_t **gw_addr = NULL;
int afi = AF_UNSPEC;
switch(gateway.afi) {
case AF_INET:
gw_addr = &(iface->ipv4_gateway);
afi = AF_INET;
break;
case AF_INET6:
gw_addr = &(iface->ipv6_gateway);
afi = AF_INET6;
break;
default:
return;
}
if (*gw_addr == NULL) { // The default gateway of this interface is not deffined yet
*gw_addr = clone_lisp_addr(&gateway);
if (*gw_addr == NULL) {
free (*gw_addr);
*gw_addr = NULL;
return;
}
} else {
copy_lisp_addr(*gw_addr,&gateway);
}
add_route(afi,iface->iface_index,NULL,NULL,*gw_addr,0,100,iface->iface_index);
}
/*
* Copy address into a new generated lisp_addr_t structure
* @param addr Address to be copied
* @return New allocated address
*/
lisp_addr_t *clone_lisp_addr(lisp_addr_t *addr)
{
lisp_addr_t *new_addr = NULL;
if ((new_addr = (lisp_addr_t *)malloc(sizeof(lisp_addr_t))) == NULL) {
lispd_log_msg(LISP_LOG_WARNING, "clone_lisp_addr: Unable to allocate memory for lisp_addr_t: %s", strerror(errno));
return(NULL);
}
copy_lisp_addr(new_addr, addr);
if (new_addr->afi == AF_UNSPEC){
lispd_log_msg(LISP_LOG_DEBUG_1, "clone_lisp_addr: Unknown AFI: %d.", addr->afi);
free (new_addr);
new_addr = NULL;
}
return (new_addr);
}
int lispd_get_iface_address(
char *ifacename,
lisp_addr_t *addr,
int afi)
{
struct ifaddrs *ifaddr;
struct ifaddrs *ifa;
struct sockaddr_in *s4;
struct sockaddr_in6 *s6;
lisp_addr_t ip;
char addr_str[MAX_INET_ADDRSTRLEN];
if (default_rloc_afi != -1){ /* If forced a exact RLOC type (Just IPv4 of just IPv6) */
if(afi != default_rloc_afi){
lispd_log_msg(LISP_LOG_INFO,"Default RLOC afi defined: Skipped %s address in iface %s",
(afi == AF_INET) ? "IPv4" : "IPv6",ifacename);
return (BAD);
}
}
/*
* make sure this is clean
*/
memset(addr, 0, sizeof(lisp_addr_t));
/*
* go search for the interface
*/
if (getifaddrs(&ifaddr) !=0) {
lispd_log_msg(LISP_LOG_DEBUG_2,
"lispd_get_iface_address: getifaddrs error: %s", strerror(errno));
return(BAD);
}
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
if ((ifa->ifa_addr == NULL) || ((ifa->ifa_flags & IFF_UP) == 0) || (ifa->ifa_addr->sa_family != afi))
continue;
switch (ifa->ifa_addr->sa_family) {
case AF_INET:
s4 = (struct sockaddr_in *)(ifa->ifa_addr);
if (strcmp(ifa->ifa_name, ifacename) == 0) {
memcpy((void *) &(ip.address),
(void *)&(s4->sin_addr), sizeof(struct in_addr));
ip.afi = AF_INET;
if (is_link_local_addr(ip) != TRUE){
copy_lisp_addr(addr,&ip);
}else{
lispd_log_msg(LISP_LOG_DEBUG_2, "lispd_get_iface_address: interface address from %s discarded (%s)",
ifacename, get_char_from_lisp_addr_t(ip));
continue;
}
lispd_log_msg(LISP_LOG_DEBUG_2, "lispd_get_iface_address: IPv4 RLOC from interface (%s): %s \n",
ifacename,
inet_ntop(AF_INET, &(s4->sin_addr),
addr_str, MAX_INET_ADDRSTRLEN));
freeifaddrs(ifaddr);
return(GOOD);
} else {
continue;
}
case AF_INET6:
s6 = (struct sockaddr_in6 *)(ifa->ifa_addr);
// XXX sin6_scope_id is an ID depending on the scope of the address. Linux only supports it for link-
// local addresses, in that case sin6_scope_id contains the interface index. --> If sin6_scope_id is
// not zero, is a link-local address
if (s6->sin6_scope_id != 0){
lispd_log_msg(LISP_LOG_DEBUG_2, "lispd_get_iface_address: interface address from %s discarded (%s)",
ifacename, inet_ntop(AF_INET6, &(s6->sin6_addr), addr_str, MAX_INET_ADDRSTRLEN));
continue;
}
if (!strcmp(ifa->ifa_name, ifacename)) {
memcpy((void *) &(addr->address),
(void *)&(s6->sin6_addr),
sizeof(struct in6_addr));
addr->afi = AF_INET6;
lispd_log_msg(LISP_LOG_DEBUG_2, "lispd_get_iface_address: IPv6 RLOC from interface (%s): %s\n",
ifacename,
inet_ntop(AF_INET6, &(s6->sin6_addr),
addr_str, MAX_INET_ADDRSTRLEN));
freeifaddrs(ifaddr);
return(GOOD);
} else {
continue;
}
default:
continue; /* XXX */
}
}
freeifaddrs(ifaddr);
lispd_log_msg(LISP_LOG_DEBUG_3, "lispd_get_iface_address: No %s RLOC configured for interface %s\n",
(afi == AF_INET) ? "IPv4" : "IPv6",
ifacename);
return(BAD);
}
void process_address_change (
lispd_iface_elt *iface,
lisp_addr_t new_addr)
{
lisp_addr_t *iface_addr = NULL;
lispd_iface_mappings_list *mapping_list = NULL;
int aux_afi = 0;
// XXX To be modified when full NAT implemented --> When Nat Aware active no IPv6 RLOCs supported
if (nat_aware == TRUE && new_addr.afi == AF_INET6) {
return;
}
/* Check if the addres is a global address*/
if (is_link_local_addr(new_addr) == TRUE) {
lispd_log_msg(LISP_LOG_DEBUG_2,"precess_address_change: the extractet address from the netlink "
"messages is a local link address: %s discarded", get_char_from_lisp_addr_t(new_addr));
return;
}
/* If default RLOC afi defined (-a 4 or 6), only accept addresses of the specified afi */
if (default_rloc_afi != AF_UNSPEC && default_rloc_afi != new_addr.afi) {
lispd_log_msg(LISP_LOG_DEBUG_2,"precess_address_change: Default RLOC afi defined (-a #): Skipped %s address in iface %s",
(new_addr.afi == AF_INET) ? "IPv4" : "IPv6",iface->iface_name);
return;
}
/*
* Actions to be done due to a change of address: SMR
*/
switch (new_addr.afi) {
case AF_INET:
iface_addr = iface->ipv4_address;
break;
case AF_INET6:
iface_addr = iface->ipv6_address;
break;
}
// Same address that we already have
if (compare_lisp_addr_t(iface_addr,&new_addr)==0) {
lispd_log_msg(LISP_LOG_DEBUG_2,"precess_address_change: The detected change of address for interface %s "
"doesn't affect",iface->iface_name);
/* We must rebind the socket just in case the address is from a virtual interface who has changed its interafce number */
switch (new_addr.afi) {
case AF_INET:
bind_socket_src_address(iface->out_socket_v4,&new_addr);
break;
case AF_INET6:
bind_socket_src_address(iface->out_socket_v6,&new_addr);
break;
}
return;
}
/*
* Change source routing rules for this interface and binding
*/
if (iface_addr->afi != AF_UNSPEC) {
del_rule(iface_addr->afi,
0,
iface->iface_index,
iface->iface_index,
RTN_UNICAST,
iface_addr,
(iface_addr->afi == AF_INET) ? 32 : 128,
NULL,0,0);
}
add_rule(new_addr.afi,
0,
iface->iface_index,
iface->iface_index,
RTN_UNICAST,
&new_addr,
(new_addr.afi == AF_INET) ? 32 : 128,
NULL,0,0);
switch (new_addr.afi) {
case AF_INET:
bind_socket_src_address(iface->out_socket_v4,&new_addr);
break;
case AF_INET6:
bind_socket_src_address(iface->out_socket_v6,&new_addr);
break;
}
aux_afi = iface_addr->afi;
// Update the new address
copy_lisp_addr(iface_addr, &new_addr);
/* The interface was down during initial configuratiopn process and now it is up. Activate address */
if (aux_afi == AF_UNSPEC) {
lispd_log_msg(LISP_LOG_DEBUG_1,"process_address_change: Activating the locator address %s"
, get_char_from_lisp_addr_t(new_addr));
activate_interface_address(iface, new_addr);
if (iface->status == UP) {
iface_balancing_vectors_calc(iface);
/*
* If no default control and data interface, recalculate it
*/
if ((default_ctrl_iface_v4 == NULL && new_addr.afi == AF_INET) ||
(default_ctrl_iface_v6 == NULL && new_addr.afi == AF_INET6)) {
lispd_log_msg(LISP_LOG_DEBUG_2,"No default control interface. Recalculate new control interface");
set_default_ctrl_ifaces();
}
if ((default_out_iface_v4 == NULL && new_addr.afi == AF_INET) ||
(default_out_iface_v6 == NULL && new_addr.afi == AF_INET6)) {
lispd_log_msg(LISP_LOG_DEBUG_2,"No default output interface. Recalculate new output interface");
set_default_output_ifaces();
}
}
}
lispd_log_msg(LISP_LOG_DEBUG_1,"precess_address_change: New address detected for interface %s -> %s",
iface->iface_name, get_char_from_lisp_addr_t(new_addr));
mapping_list = iface->head_mappings_list;
/* Sort again the locators list of the affected mappings*/
while (mapping_list != NULL) {
if (aux_afi != AF_UNSPEC && // When the locator is activated, it is automatically sorted
((new_addr.afi == AF_INET && mapping_list->use_ipv4_address == TRUE) ||
(new_addr.afi == AF_INET6 && mapping_list->use_ipv6_address == TRUE))) {
sort_locators_list_elt (mapping_list->mapping, iface_addr);
}
mapping_list = mapping_list->next;
}
/* Indicate change of address in the interface */
switch (new_addr.afi) {
case AF_INET:
iface->ipv4_changed = TRUE;
break;
case AF_INET6:
iface->ipv6_changed = TRUE;
break;
}
/* If it is compiled in router mode, then recompile default routes changing the indicated src address*/
if (router_mode == TRUE) {
switch (new_addr.afi) {
case AF_INET:
if (iface == default_out_iface_v4) {
set_tun_default_route_v4();
}
break;
case AF_INET6:
if (iface == default_out_iface_v6) {
del_tun_default_route_v6();
set_tun_default_route_v6();
}
break;
}
}
/* Check if the new address is behind NAT */
if(nat_aware==TRUE) {
// TODO : To be modified when implementing NAT per multiple interfaces
nat_status = UNKNOWN;
clear_rtr_from_locators (iface);
if (iface->status == UP) {
initial_info_request_process();
} else {
nat_aware_iface_address_change = TRUE;
}
}
/* Reprograming SMR timer*/
if (smr_timer == NULL) {
smr_timer = create_timer (SMR_TIMER);
}
start_timer(smr_timer, LISPD_SMR_TIMEOUT,(timer_callback)init_smr, NULL);
}
void process_new_gateway (
lisp_addr_t gateway,
lispd_iface_elt *iface )
{
lisp_addr_t **gw_addr = NULL;
int afi = AF_UNSPEC;
lispd_mapping_list *map_list = NULL;
switch(gateway.afi){
case AF_INET:
gw_addr = &(iface->ipv4_gateway);
afi = AF_INET;
iface->ipv4_changed = TRUE;
break;
case AF_INET6:
gw_addr = &(iface->ipv6_gateway);
afi = AF_INET6;
iface->ipv6_changed = TRUE;
break;
default:
return;
}
if (*gw_addr == NULL){ // The default gateway of this interface is not deffined yet
*gw_addr = clone_lisp_addr(&gateway);
if (*gw_addr == NULL){
free (*gw_addr);
*gw_addr = NULL;
return;
}
}else{
copy_lisp_addr(*gw_addr,&gateway);
}
#ifndef VPNAPI
add_route(afi,iface->iface_index,NULL,NULL,*gw_addr,0,100,iface->iface_index);
#endif
#ifdef VPNAPI
if (iface->status != UP){
lispd_log_msg(LISP_LOG_DEBUG_1,"process_new_gateway: Probably the interface %s is UP "
"but we didn't receive netlink indicating this. Change %s status to UP",
iface->iface_name,iface->iface_name);
iface->status = UP;
/*
* If we don't have default control or output iface, recalculate it
*/
if ((default_ctrl_iface_v4 == NULL && iface->ipv4_address->afi != AF_UNSPEC) ||
(default_ctrl_iface_v6 == NULL && iface->ipv6_address->afi != AF_UNSPEC)){
lispd_log_msg(LISP_LOG_DEBUG_2,"process_new_gateway: Recalculate new control interface");
set_default_ctrl_ifaces();
}
if ((default_out_iface_v4 == NULL && iface->ipv4_address->afi != AF_UNSPEC) ||
(default_out_iface_v6 == NULL && iface->ipv6_address->afi != AF_UNSPEC)){
lispd_log_msg(LISP_LOG_DEBUG_2,"process_new_gateway: Recalculate new data interface");
set_default_output_ifaces();
}
}
if (gateway.afi == AF_INET){
reset_socket(ipv4_data_input_fd);
reset_socket(ipv4_control_input_fd);
}else{
reset_socket(ipv6_data_input_fd);
reset_socket(ipv6_control_input_fd);
}
#endif
/* Check if the interface is behind NAT */
if(nat_aware==TRUE){
if (iface->status == UP && iface->ipv4_address != NULL){
map_list = get_mappings_from_iface(iface);
restart_info_request_process(map_list,iface->ipv4_address);
free_mapping_list(map_list,FALSE);
}
}
/* Reprograming SMR timer*/
if (smr_timer == NULL){
smr_timer = create_timer (SMR_TIMER);
}
start_timer(smr_timer, LISPD_SMR_TIMEOUT,(timer_callback)init_smr, NULL);
}
